Merge remote-tracking branch 'origin/et_opengl_3'

resources/shaders/110/background.fs

@@ -0,0 +1,11 @@
+#version 110
+
+uniform vec4 top_color;
+uniform vec4 bottom_color;
+
+varying vec2 tex_coord;
+
+void main()
+{
+    gl_FragColor = mix(bottom_color, top_color, tex_coord.y);
+}

resources/shaders/110/flat.fs

@@ -0,0 +1,8 @@
+#version 110
+
+uniform vec4 uniform_color;
+
+void main()
+{
+    gl_FragColor = uniform_color;
+}

resources/shaders/110/flat.vs

@@ -1,10 +1,10 @@
 #version 110
 
-attribute vec3 v_position;
-
 uniform mat4 view_model_matrix;
 uniform mat4 projection_matrix;
 
+attribute vec3 v_position;
+
 void main()
 {
     gl_Position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);

resources/shaders/110/flat_texture.fs

@@ -0,0 +1,10 @@
+#version 110
+
+uniform sampler2D uniform_texture;
+
+varying vec2 tex_coord;
+
+void main()
+{
+    gl_FragColor = texture2D(uniform_texture, tex_coord);
+}

resources/shaders/110/flat_texture.vs

@@ -1,11 +1,11 @@
 #version 110
 
-attribute vec3 v_position;
-attribute vec2 v_tex_coord;
-
 uniform mat4 view_model_matrix;
 uniform mat4 projection_matrix;
 
+attribute vec3 v_position;
+attribute vec2 v_tex_coord;
+
 varying vec2 tex_coord;
 
 void main()

resources/shaders/110/gouraud.fs

@@ -0,0 +1,86 @@
+#version 110
+
+const vec3 ZERO = vec3(0.0, 0.0, 0.0);
+const float EPSILON = 0.0001;
+
+struct PrintVolumeDetection
+{
+	// 0 = rectangle, 1 = circle, 2 = custom, 3 = invalid
+	int type;
+    // type = 0 (rectangle):
+    // x = min.x, y = min.y, z = max.x, w = max.y
+    // type = 1 (circle):
+    // x = center.x, y = center.y, z = radius
+	vec4 xy_data;
+    // x = min z, y = max z
+	vec2 z_data;
+};
+
+struct SlopeDetection
+{
+    bool actived;
+	float normal_z;
+    mat3 volume_world_normal_matrix;
+};
+
+uniform vec4 uniform_color;
+uniform SlopeDetection slope;
+
+uniform bool offset_depth_buffer;
+
+#ifdef ENABLE_ENVIRONMENT_MAP
+    uniform sampler2D environment_tex;
+    uniform bool use_environment_tex;
+#endif // ENABLE_ENVIRONMENT_MAP
+
+uniform PrintVolumeDetection print_volume;
+
+varying vec3 clipping_planes_dots;
+
+// x = diffuse, y = specular;
+varying vec2 intensity;
+
+varying vec4 world_pos;
+varying float world_normal_z;
+varying vec3 eye_normal;
+
+void main()
+{
+    if (any(lessThan(clipping_planes_dots, ZERO)))
+        discard;
+    vec3  color = uniform_color.rgb;
+    float alpha = uniform_color.a;
+
+    if (slope.actived && world_normal_z < slope.normal_z - EPSILON) {
+        color = vec3(0.7, 0.7, 1.0);
+        alpha = 1.0;
+    }
+	
+    // if the fragment is outside the print volume -> use darker color
+	vec3 pv_check_min = ZERO;
+	vec3 pv_check_max = ZERO;
+    if (print_volume.type == 0) {
+		// rectangle
+		pv_check_min = world_pos.xyz - vec3(print_volume.xy_data.x, print_volume.xy_data.y, print_volume.z_data.x);
+		pv_check_max = world_pos.xyz - vec3(print_volume.xy_data.z, print_volume.xy_data.w, print_volume.z_data.y);
+	}
+	else if (print_volume.type == 1) {
+		// circle
+		float delta_radius = print_volume.xy_data.z - distance(world_pos.xy, print_volume.xy_data.xy);
+		pv_check_min = vec3(delta_radius, 0.0, world_pos.z - print_volume.z_data.x);
+		pv_check_max = vec3(0.0, 0.0, world_pos.z - print_volume.z_data.y);
+	}	
+	color = (any(lessThan(pv_check_min, ZERO)) || any(greaterThan(pv_check_max, ZERO))) ? mix(color, ZERO, 0.3333) : color;
+	
+#ifdef ENABLE_ENVIRONMENT_MAP
+    if (use_environment_tex)
+        gl_FragColor = vec4(0.45 * texture2D(environment_tex, normalize(eye_normal).xy * 0.5 + 0.5).xyz + 0.8 * color * intensity.x, alpha);
+    else
+#endif
+        gl_FragColor = vec4(vec3(intensity.y) + color * intensity.x, alpha);
+		
+    // In the support painting gizmo and the seam painting gizmo are painted triangles rendered over the already
+    // rendered object. To resolved z-fighting between previously rendered object and painted triangles, values
+    // inside the depth buffer are offset by small epsilon for painted triangles inside those gizmos.
+    gl_FragDepth = gl_FragCoord.z - (offset_depth_buffer ? EPSILON : 0.0);
+}

resources/shaders/110/gouraud.vs

@@ -25,9 +25,6 @@ struct SlopeDetection
     mat3 volume_world_normal_matrix;
 };
 
-attribute vec3 v_position;
-attribute vec3 v_normal;
-
 uniform mat4 view_model_matrix;
 uniform mat4 projection_matrix;
 uniform mat3 normal_matrix;
@@ -39,6 +36,9 @@ uniform vec2 z_range;
 // Clipping plane - general orientation. Used by the SLA gizmo.
 uniform vec4 clipping_plane;
 
+attribute vec3 v_position;
+attribute vec3 v_normal;
+
 // x = diffuse, y = specular;
 varying vec2 intensity;
 

resources/shaders/110/gouraud_light.fs

@@ -0,0 +1,12 @@
+#version 110
+
+uniform vec4 uniform_color;
+uniform float emission_factor;
+
+// x = tainted, y = specular;
+varying vec2 intensity;
+
+void main()
+{
+    gl_FragColor = vec4(vec3(intensity.y) + uniform_color.rgb * (intensity.x + emission_factor), uniform_color.a);
+}

resources/shaders/110/gouraud_light.vs

@@ -14,13 +14,13 @@ const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
 
 #define INTENSITY_AMBIENT    0.3
 
-attribute vec3 v_position;
-attribute vec3 v_normal;
-
 uniform mat4 view_model_matrix;
 uniform mat4 projection_matrix;
 uniform mat3 normal_matrix;
 
+attribute vec3 v_position;
+attribute vec3 v_normal;
+
 // x = tainted, y = specular;
 varying vec2 intensity;
 

resources/shaders/110/gouraud_light_instanced.fs

@@ -0,0 +1,12 @@
+#version 110
+
+uniform vec4 uniform_color;
+uniform float emission_factor;
+
+// x = tainted, y = specular;
+varying vec2 intensity;
+
+void main()
+{
+    gl_FragColor = vec4(vec3(intensity.y) + uniform_color.rgb * (intensity.x + emission_factor), uniform_color.a);
+}

resources/shaders/110/gouraud_light_instanced.vs

@@ -14,6 +14,10 @@ const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
 
 #define INTENSITY_AMBIENT    0.3
 
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+
 // vertex attributes
 attribute vec3 v_position;
 attribute vec3 v_normal;
@@ -21,10 +25,6 @@ attribute vec3 v_normal;
 attribute vec3 i_offset;
 attribute vec2 i_scales;
 
-uniform mat4 view_model_matrix;
-uniform mat4 projection_matrix;
-uniform mat3 normal_matrix;
-
 // x = tainted, y = specular;
 varying vec2 intensity;
 

resources/shaders/110/mm_contour.vs

@@ -1,10 +1,10 @@
 #version 110
 
-attribute vec3 v_position;
-
 uniform mat4 view_model_matrix;
 uniform mat4 projection_matrix;
 
+attribute vec3 v_position;
+
 void main()
 {
     gl_Position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);

resources/shaders/110/mm_gouraud.vs

@@ -2,8 +2,6 @@
 
 const vec3 ZERO = vec3(0.0, 0.0, 0.0);
 
-attribute vec3 v_position;
-
 uniform mat4 view_model_matrix;
 uniform mat4 projection_matrix;
 
@@ -13,6 +11,8 @@ uniform vec2 z_range;
 // Clipping plane - general orientation. Used by the SLA gizmo.
 uniform vec4 clipping_plane;
 
+attribute vec3 v_position;
+
 varying vec3 clipping_planes_dots;
 varying vec4 model_pos;
 

resources/shaders/110/printbed.fs

@@ -0,0 +1,34 @@
+#version 110
+
+const vec3 back_color_dark  = vec3(0.235, 0.235, 0.235);
+const vec3 back_color_light = vec3(0.365, 0.365, 0.365);
+
+uniform sampler2D texture;
+uniform bool transparent_background;
+uniform bool svg_source;
+
+varying vec2 tex_coord;
+
+vec4 svg_color()
+{
+    // takes foreground from texture
+    vec4 fore_color = texture2D(texture, tex_coord);
+
+    // calculates radial gradient
+    vec3 back_color = vec3(mix(back_color_light, back_color_dark, smoothstep(0.0, 0.5, length(abs(tex_coord.xy) - vec2(0.5)))));
+
+    // blends foreground with background
+    return vec4(mix(back_color, fore_color.rgb, fore_color.a), transparent_background ? fore_color.a : 1.0);
+}
+
+vec4 non_svg_color()
+{
+    // takes foreground from texture
+    vec4 color = texture2D(texture, tex_coord);
+    return vec4(color.rgb, transparent_background ? color.a * 0.25 : color.a);
+}
+
+void main()
+{
+    gl_FragColor = svg_source ? svg_color() : non_svg_color();
+}

resources/shaders/110/printbed.vs

@@ -1,11 +1,11 @@
 #version 110
 
-attribute vec3 v_position;
-attribute vec2 v_tex_coord;
-
 uniform mat4 view_model_matrix;
 uniform mat4 projection_matrix;
 
+attribute vec3 v_position;
+attribute vec2 v_tex_coord;
+
 varying vec2 tex_coord;
 
 void main()

resources/shaders/110/toolpaths_cog.fs

@@ -0,0 +1,19 @@
+#version 110
+
+const vec4 BLACK = vec4(vec3(0.1), 1.0);
+const vec4 WHITE = vec4(vec3(1.0), 1.0);
+
+const float emission_factor = 0.25;
+
+uniform vec3 world_center;
+
+// x = tainted, y = specular;
+varying vec2 intensity;
+varying vec3 world_position;
+
+void main()
+{
+    vec3 delta = world_position - world_center;
+    vec4 color = delta.x * delta.y * delta.z > 0.0 ? BLACK : WHITE;
+    gl_FragColor = vec4(vec3(intensity.y) + color.rgb * (intensity.x + emission_factor), 1.0);
+}

resources/shaders/110/toolpaths_cog.vs

@@ -14,13 +14,13 @@ const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
 
 #define INTENSITY_AMBIENT    0.3
 
-attribute vec3 v_position;
-attribute vec3 v_normal;
-
 uniform mat4 view_model_matrix;
 uniform mat4 projection_matrix;
 uniform mat3 normal_matrix;
 
+attribute vec3 v_position;
+attribute vec3 v_normal;
+
 // x = tainted, y = specular;
 varying vec2 intensity;
 varying vec3 world_position;

resources/shaders/110/variable_layer_height.fs

@@ -0,0 +1,41 @@
+#version 110
+
+#define M_PI 3.1415926535897932384626433832795
+
+// 2D texture (1D texture split by the rows) of color along the object Z axis.
+uniform sampler2D z_texture;
+// Scaling from the Z texture rows coordinate to the normalized texture row coordinate.
+uniform float z_to_texture_row;
+uniform float z_texture_row_to_normalized;
+uniform float z_cursor;
+uniform float z_cursor_band_width;
+
+// x = tainted, y = specular;
+varying vec2 intensity;
+
+varying float object_z;
+
+void main()
+{
+    float object_z_row = z_to_texture_row * object_z;
+    // Index of the row in the texture.
+    float z_texture_row = floor(object_z_row);
+    // Normalized coordinate from 0. to 1.
+    float z_texture_col = object_z_row - z_texture_row;
+    float z_blend = 0.25 * cos(min(M_PI, abs(M_PI * (object_z - z_cursor) * 1.8 / z_cursor_band_width))) + 0.25;
+    // Calculate level of detail from the object Z coordinate.
+    // This makes the slowly sloping surfaces to be shown with high detail (with stripes),
+    // and the vertical surfaces to be shown with low detail (no stripes)
+    float z_in_cells = object_z_row * 190.;
+    // Gradient of Z projected on the screen.
+    float dx_vtc = dFdx(z_in_cells);
+    float dy_vtc = dFdy(z_in_cells);
+    float lod = clamp(0.5 * log2(max(dx_vtc * dx_vtc, dy_vtc * dy_vtc)), 0., 1.);
+    // Sample the Z texture. Texture coordinates are normalized to <0, 1>.
+    vec4 color = vec4(0.25, 0.25, 0.25, 1.0);
+    if (z_texture_row >= 0.0)
+        color = mix(texture2D(z_texture, vec2(z_texture_col, z_texture_row_to_normalized * (z_texture_row + 0.5    )), -10000.),
+                    texture2D(z_texture, vec2(z_texture_col, z_texture_row_to_normalized * (z_texture_row * 2. + 1.)),  10000.), lod);            
+    // Mix the final color.
+    gl_FragColor = vec4(vec3(intensity.y), 1.0) +  intensity.x * mix(color, vec4(1.0, 1.0, 0.0, 1.0), z_blend);
+}

resources/shaders/110/variable_layer_height.vs

@@ -14,16 +14,16 @@ const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
 
 #define INTENSITY_AMBIENT    0.3
 
-attribute vec3 v_position;
-attribute vec3 v_normal;
-attribute vec2 v_tex_coord;
-
 uniform mat4 view_model_matrix;
 uniform mat4 projection_matrix;
 uniform mat3 normal_matrix;
 uniform mat4 volume_world_matrix;
 uniform float object_max_z;
 
+attribute vec3 v_position;
+attribute vec3 v_normal;
+attribute vec2 v_tex_coord;
+
 // x = tainted, y = specular;
 varying vec2 intensity;
 

resources/shaders/140/background.fs

@@ -0,0 +1,11 @@
+#version 140
+
+uniform vec4 top_color;
+uniform vec4 bottom_color;
+
+in vec2 tex_coord;
+
+void main()
+{
+    gl_FragColor = mix(bottom_color, top_color, tex_coord.y);
+}

resources/shaders/140/background.vs

@@ -0,0 +1,12 @@
+#version 140
+
+in vec3 v_position;
+in vec2 v_tex_coord;
+
+out vec2 tex_coord;
+
+void main()
+{
+	tex_coord = v_tex_coord;
+    gl_Position = vec4(v_position, 1.0);
+}

resources/shaders/140/flat.fs

@@ -0,0 +1,8 @@
+#version 140
+
+uniform vec4 uniform_color;
+
+void main()
+{
+    gl_FragColor = uniform_color;
+}

resources/shaders/140/flat.vs

@@ -0,0 +1,11 @@
+#version 140
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+in vec3 v_position;
+
+void main()
+{
+    gl_Position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);
+}

resources/shaders/140/flat_texture.fs

@@ -0,0 +1,10 @@
+#version 140
+
+uniform sampler2D uniform_texture;
+
+in vec2 tex_coord;
+
+void main()
+{
+    gl_FragColor = texture(uniform_texture, tex_coord);
+}

resources/shaders/140/flat_texture.vs

@@ -0,0 +1,15 @@
+#version 140
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+in vec3 v_position;
+in vec2 v_tex_coord;
+
+out vec2 tex_coord;
+
+void main()
+{
+	tex_coord = v_tex_coord;
+    gl_Position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);
+}

resources/shaders/140/gouraud.fs

@@ -0,0 +1,86 @@
+#version 140
+
+const vec3 ZERO = vec3(0.0, 0.0, 0.0);
+const float EPSILON = 0.0001;
+
+struct PrintVolumeDetection
+{
+	// 0 = rectangle, 1 = circle, 2 = custom, 3 = invalid
+	int type;
+    // type = 0 (rectangle):
+    // x = min.x, y = min.y, z = max.x, w = max.y
+    // type = 1 (circle):
+    // x = center.x, y = center.y, z = radius
+	vec4 xy_data;
+    // x = min z, y = max z
+	vec2 z_data;
+};
+
+struct SlopeDetection
+{
+    bool actived;
+	float normal_z;
+    mat3 volume_world_normal_matrix;
+};
+
+uniform vec4 uniform_color;
+uniform SlopeDetection slope;
+
+uniform bool offset_depth_buffer;
+
+#ifdef ENABLE_ENVIRONMENT_MAP
+    uniform sampler2D environment_tex;
+    uniform bool use_environment_tex;
+#endif // ENABLE_ENVIRONMENT_MAP
+
+uniform PrintVolumeDetection print_volume;
+
+in vec3 clipping_planes_dots;
+
+// x = diffuse, y = specular;
+in vec2 intensity;
+
+in vec4 world_pos;
+in float world_normal_z;
+in vec3 eye_normal;
+
+void main()
+{
+    if (any(lessThan(clipping_planes_dots, ZERO)))
+        discard;
+    vec3  color = uniform_color.rgb;
+    float alpha = uniform_color.a;
+
+    if (slope.actived && world_normal_z < slope.normal_z - EPSILON) {
+        color = vec3(0.7, 0.7, 1.0);
+        alpha = 1.0;
+    }
+	
+    // if the fragment is outside the print volume -> use darker color
+	vec3 pv_check_min = ZERO;
+	vec3 pv_check_max = ZERO;
+    if (print_volume.type == 0) {
+		// rectangle
+		pv_check_min = world_pos.xyz - vec3(print_volume.xy_data.x, print_volume.xy_data.y, print_volume.z_data.x);
+		pv_check_max = world_pos.xyz - vec3(print_volume.xy_data.z, print_volume.xy_data.w, print_volume.z_data.y);
+	}
+	else if (print_volume.type == 1) {
+		// circle
+		float delta_radius = print_volume.xy_data.z - distance(world_pos.xy, print_volume.xy_data.xy);
+		pv_check_min = vec3(delta_radius, 0.0, world_pos.z - print_volume.z_data.x);
+		pv_check_max = vec3(0.0, 0.0, world_pos.z - print_volume.z_data.y);
+	}	
+	color = (any(lessThan(pv_check_min, ZERO)) || any(greaterThan(pv_check_max, ZERO))) ? mix(color, ZERO, 0.3333) : color;
+	
+#ifdef ENABLE_ENVIRONMENT_MAP
+    if (use_environment_tex)
+        gl_FragColor = vec4(0.45 * texture(environment_tex, normalize(eye_normal).xy * 0.5 + 0.5).xyz + 0.8 * color * intensity.x, alpha);
+    else
+#endif
+        gl_FragColor = vec4(vec3(intensity.y) + color * intensity.x, alpha);
+		
+    // In the support painting gizmo and the seam painting gizmo are painted triangles rendered over the already
+    // rendered object. To resolved z-fighting between previously rendered object and painted triangles, values
+    // inside the depth buffer are offset by small epsilon for painted triangles inside those gizmos.
+    gl_FragDepth = gl_FragCoord.z - (offset_depth_buffer ? EPSILON : 0.0);
+}

resources/shaders/140/gouraud.vs

@@ -0,0 +1,77 @@
+#version 140
+
+#define INTENSITY_CORRECTION 0.6
+
+// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31)
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+// normalized values for (1./1.43, 0.2/1.43, 1./1.43)
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+//#define LIGHT_FRONT_SPECULAR (0.0 * INTENSITY_CORRECTION)
+//#define LIGHT_FRONT_SHININESS 5.0
+
+#define INTENSITY_AMBIENT    0.3
+
+const vec3 ZERO = vec3(0.0, 0.0, 0.0);
+
+struct SlopeDetection
+{
+    bool actived;
+	float normal_z;
+    mat3 volume_world_normal_matrix;
+};
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+uniform mat4 volume_world_matrix;
+uniform SlopeDetection slope;
+
+// Clipping plane, x = min z, y = max z. Used by the FFF and SLA previews to clip with a top / bottom plane.
+uniform vec2 z_range;
+// Clipping plane - general orientation. Used by the SLA gizmo.
+uniform vec4 clipping_plane;
+
+in vec3 v_position;
+in vec3 v_normal;
+
+// x = diffuse, y = specular;
+out vec2 intensity;
+
+out vec3 clipping_planes_dots;
+
+out vec4 world_pos;
+out float world_normal_z;
+out vec3 eye_normal;
+
+void main()
+{
+	// First transform the normal into camera space and normalize the result.
+    eye_normal = normalize(normal_matrix * v_normal);
+
+	// Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+	// Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+	float NdotL = max(dot(eye_normal, LIGHT_TOP_DIR), 0.0);
+
+	intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec4 position = view_model_matrix * vec4(v_position, 1.0);
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(position.xyz), reflect(-LIGHT_TOP_DIR, eye_normal)), 0.0), LIGHT_TOP_SHININESS);
+
+	// Perform the same lighting calculation for the 2nd light source (no specular applied).
+	NdotL = max(dot(eye_normal, LIGHT_FRONT_DIR), 0.0);
+	intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    // Point in homogenous coordinates.
+    world_pos = volume_world_matrix * vec4(v_position, 1.0);
+
+    // z component of normal vector in world coordinate used for slope shading
+    world_normal_z = slope.actived ? (normalize(slope.volume_world_normal_matrix * v_normal)).z : 0.0;
+
+    gl_Position = projection_matrix * position;
+    // Fill in the scalars for fragment shader clipping. Fragments with any of these components lower than zero are discarded.
+    clipping_planes_dots = vec3(dot(world_pos, clipping_plane), world_pos.z - z_range.x, z_range.y - world_pos.z);
+}

resources/shaders/140/gouraud_light.fs

@@ -0,0 +1,12 @@
+#version 140
+
+uniform vec4 uniform_color;
+uniform float emission_factor;
+
+// x = tainted, y = specular;
+in vec2 intensity;
+
+void main()
+{
+    gl_FragColor = vec4(vec3(intensity.y) + uniform_color.rgb * (intensity.x + emission_factor), uniform_color.a);
+}

resources/shaders/140/gouraud_light.vs

@@ -0,0 +1,45 @@
+#version 140
+
+#define INTENSITY_CORRECTION 0.6
+
+// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31)
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+// normalized values for (1./1.43, 0.2/1.43, 1./1.43)
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+
+#define INTENSITY_AMBIENT    0.3
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+
+in vec3 v_position;
+in vec3 v_normal;
+
+// x = tainted, y = specular;
+out vec2 intensity;
+
+void main()
+{
+    // First transform the normal into camera space and normalize the result.
+    vec3 normal = normalize(normal_matrix * v_normal);
+    
+    // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+    // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+    float NdotL = max(dot(normal, LIGHT_TOP_DIR), 0.0);
+
+    intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec4 position = view_model_matrix * vec4(v_position, 1.0);
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(position.xyz), reflect(-LIGHT_TOP_DIR, normal)), 0.0), LIGHT_TOP_SHININESS);
+
+    // Perform the same lighting calculation for the 2nd light source (no specular applied).
+    NdotL = max(dot(normal, LIGHT_FRONT_DIR), 0.0);
+    intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    gl_Position = projection_matrix * position;
+}

resources/shaders/140/gouraud_light_instanced.fs

@@ -0,0 +1,12 @@
+#version 140
+
+uniform vec4 uniform_color;
+uniform float emission_factor;
+
+// x = tainted, y = specular;
+in vec2 intensity;
+
+void main()
+{
+    gl_FragColor = vec4(vec3(intensity.y) + uniform_color.rgb * (intensity.x + emission_factor), uniform_color.a);
+}

resources/shaders/140/gouraud_light_instanced.vs

@@ -0,0 +1,50 @@
+#version 140
+
+#define INTENSITY_CORRECTION 0.6
+
+// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31)
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+// normalized values for (1./1.43, 0.2/1.43, 1./1.43)
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+
+#define INTENSITY_AMBIENT    0.3
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+
+// vertex attributes
+in vec3 v_position;
+in vec3 v_normal;
+// instance attributes
+in vec3 i_offset;
+in vec2 i_scales;
+
+// x = tainted, y = specular;
+out vec2 intensity;
+
+void main()
+{
+    // First transform the normal into camera space and normalize the result.
+    vec3 eye_normal = normalize(normal_matrix * v_normal);
+    
+    // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+    // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+    float NdotL = max(dot(eye_normal, LIGHT_TOP_DIR), 0.0);
+
+    intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec4 world_position = vec4(v_position * vec3(vec2(1.5 * i_scales.x), 1.5 * i_scales.y) + i_offset - vec3(0.0, 0.0, 0.5 * i_scales.y), 1.0);
+    vec4 eye_position = view_model_matrix * world_position;
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(eye_position.xyz), reflect(-LIGHT_TOP_DIR, eye_normal)), 0.0), LIGHT_TOP_SHININESS);
+
+    // Perform the same lighting calculation for the 2nd light source (no specular applied).
+    NdotL = max(dot(eye_normal, LIGHT_FRONT_DIR), 0.0);
+    intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    gl_Position = projection_matrix * eye_position;
+}

resources/shaders/140/imgui.fs

@@ -0,0 +1,11 @@
+#version 140
+
+uniform sampler2D Texture;
+
+in vec2 Frag_UV;
+in vec4 Frag_Color;
+
+void main()
+{
+	gl_FragColor = Frag_Color * texture(Texture, Frag_UV.st);
+}

resources/shaders/140/imgui.vs

@@ -0,0 +1,17 @@
+#version 140
+
+uniform mat4 ProjMtx;
+
+in vec2 Position;
+in vec2 UV;
+in vec4 Color;
+
+out vec2 Frag_UV;
+out vec4 Frag_Color;
+
+void main()
+{
+	Frag_UV = UV;
+	Frag_Color = Color;
+    gl_Position = ProjMtx * vec4(Position.xy, 0.0, 1.0);
+}

resources/shaders/140/mm_contour.fs

@@ -0,0 +1,13 @@
+#version 140
+
+const float EPSILON = 0.0001;
+
+uniform vec4 uniform_color;
+
+void main()
+{
+    gl_FragColor = uniform_color;
+    // Values inside depth buffer for fragments of the contour of a selected area are offset
+    // by small epsilon to solve z-fighting between painted triangles and contour lines.
+    gl_FragDepth = gl_FragCoord.z - EPSILON;
+}

resources/shaders/140/mm_contour.vs

@@ -0,0 +1,11 @@
+#version 140
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+in vec3 v_position;
+
+void main()
+{
+    gl_Position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);
+}

resources/shaders/140/mm_gouraud.fs

@@ -0,0 +1,63 @@
+#version 140
+
+#define INTENSITY_CORRECTION 0.6
+
+// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31)
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+// normalized values for (1./1.43, 0.2/1.43, 1./1.43)
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+
+#define INTENSITY_AMBIENT    0.3
+
+const vec3  ZERO    = vec3(0.0, 0.0, 0.0);
+const float EPSILON = 0.0001;
+
+uniform vec4 uniform_color;
+
+uniform bool volume_mirrored;
+
+uniform mat4 view_model_matrix;
+uniform mat3 normal_matrix;
+
+in vec3 clipping_planes_dots;
+in vec4 model_pos;
+
+void main()
+{
+    if (any(lessThan(clipping_planes_dots, ZERO)))
+        discard;
+    vec3  color = uniform_color.rgb;
+    float alpha = uniform_color.a;
+
+    vec3 triangle_normal = normalize(cross(dFdx(model_pos.xyz), dFdy(model_pos.xyz)));
+#ifdef FLIP_TRIANGLE_NORMALS
+    triangle_normal = -triangle_normal;
+#endif
+
+    if (volume_mirrored)
+        triangle_normal = -triangle_normal;
+
+    // First transform the normal into camera space and normalize the result.
+    vec3 eye_normal = normalize(normal_matrix * triangle_normal);
+
+    // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+    // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+    float NdotL = max(dot(eye_normal, LIGHT_TOP_DIR), 0.0);
+
+    // x = diffuse, y = specular;
+    vec2 intensity = vec2(0.0);
+    intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec3 position = (view_model_matrix * model_pos).xyz;
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(position), reflect(-LIGHT_TOP_DIR, eye_normal)), 0.0), LIGHT_TOP_SHININESS);
+
+    // Perform the same lighting calculation for the 2nd light source (no specular applied).
+    NdotL = max(dot(eye_normal, LIGHT_FRONT_DIR), 0.0);
+    intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    gl_FragColor = vec4(vec3(intensity.y) + color * intensity.x, alpha);
+}

resources/shaders/140/mm_gouraud.vs

@@ -0,0 +1,28 @@
+#version 140
+
+const vec3 ZERO = vec3(0.0, 0.0, 0.0);
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+uniform mat4 volume_world_matrix;
+// Clipping plane, x = min z, y = max z. Used by the FFF and SLA previews to clip with a top / bottom plane.
+uniform vec2 z_range;
+// Clipping plane - general orientation. Used by the SLA gizmo.
+uniform vec4 clipping_plane;
+
+in vec3 v_position;
+
+out vec3 clipping_planes_dots;
+out vec4 model_pos;
+
+void main()
+{
+    model_pos = vec4(v_position, 1.0);
+    // Point in homogenous coordinates.
+    vec4 world_pos = volume_world_matrix * model_pos;
+
+    gl_Position = projection_matrix * view_model_matrix * model_pos;
+    // Fill in the scalars for fragment shader clipping. Fragments with any of these components lower than zero are discarded.
+    clipping_planes_dots = vec3(dot(world_pos, clipping_plane), world_pos.z - z_range.x, z_range.y - world_pos.z);
+}

resources/shaders/140/printbed.fs

@@ -0,0 +1,34 @@
+#version 140
+
+const vec3 back_color_dark  = vec3(0.235, 0.235, 0.235);
+const vec3 back_color_light = vec3(0.365, 0.365, 0.365);
+
+uniform sampler2D texture;
+uniform bool transparent_background;
+uniform bool svg_source;
+
+in vec2 tex_coord;
+
+vec4 svg_color()
+{
+    // takes foreground from texture
+    vec4 fore_color = texture(texture, tex_coord);
+
+    // calculates radial gradient
+    vec3 back_color = vec3(mix(back_color_light, back_color_dark, smoothstep(0.0, 0.5, length(abs(tex_coord.xy) - vec2(0.5)))));
+
+    // blends foreground with background
+    return vec4(mix(back_color, fore_color.rgb, fore_color.a), transparent_background ? fore_color.a : 1.0);
+}
+
+vec4 non_svg_color()
+{
+    // takes foreground from texture
+    vec4 color = texture(texture, tex_coord);
+    return vec4(color.rgb, transparent_background ? color.a * 0.25 : color.a);
+}
+
+void main()
+{
+    gl_FragColor = svg_source ? svg_color() : non_svg_color();
+}

resources/shaders/140/printbed.vs

@@ -0,0 +1,15 @@
+#version 140
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+in vec3 v_position;
+in vec2 v_tex_coord;
+
+out vec2 tex_coord;
+
+void main()
+{
+	tex_coord = v_tex_coord;
+    gl_Position = projection_matrix * view_model_matrix * vec4(v_position, 1.0);
+}

resources/shaders/140/toolpaths_cog.fs

@@ -0,0 +1,19 @@
+#version 140
+
+const vec4 BLACK = vec4(vec3(0.1), 1.0);
+const vec4 WHITE = vec4(vec3(1.0), 1.0);
+
+const float emission_factor = 0.25;
+
+uniform vec3 world_center;
+
+// x = tainted, y = specular;
+in vec2 intensity;
+in vec3 world_position;
+
+void main()
+{
+    vec3 delta = world_position - world_center;
+    vec4 color = delta.x * delta.y * delta.z > 0.0 ? BLACK : WHITE;
+    gl_FragColor = vec4(vec3(intensity.y) + color.rgb * (intensity.x + emission_factor), 1.0);
+}

resources/shaders/140/toolpaths_cog.vs

@@ -0,0 +1,47 @@
+#version 140
+
+#define INTENSITY_CORRECTION 0.6
+
+// normalized values for (-0.6/1.31, 0.6/1.31, 1./1.31)
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+// normalized values for (1./1.43, 0.2/1.43, 1./1.43)
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+
+#define INTENSITY_AMBIENT    0.3
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+
+in vec3 v_position;
+in vec3 v_normal;
+
+// x = tainted, y = specular;
+out vec2 intensity;
+out vec3 world_position;
+
+void main()
+{
+    // First transform the normal into camera space and normalize the result.
+    vec3 normal = normalize(normal_matrix * v_normal);
+    
+    // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+    // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+    float NdotL = max(dot(normal, LIGHT_TOP_DIR), 0.0);
+
+    intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec4 position = view_model_matrix * vec4(v_position, 1.0);
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(position.xyz), reflect(-LIGHT_TOP_DIR, normal)), 0.0), LIGHT_TOP_SHININESS);
+
+    // Perform the same lighting calculation for the 2nd light source (no specular applied).
+    NdotL = max(dot(normal, LIGHT_FRONT_DIR), 0.0);
+    intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+	world_position = v_position;
+    gl_Position = projection_matrix * position;
+}

resources/shaders/140/variable_layer_height.fs

@@ -0,0 +1,41 @@
+#version 140
+
+#define M_PI 3.1415926535897932384626433832795
+
+// 2D texture (1D texture split by the rows) of color along the object Z axis.
+uniform sampler2D z_texture;
+// Scaling from the Z texture rows coordinate to the normalized texture row coordinate.
+uniform float z_to_texture_row;
+uniform float z_texture_row_to_normalized;
+uniform float z_cursor;
+uniform float z_cursor_band_width;
+
+// x = tainted, y = specular;
+in vec2 intensity;
+
+in float object_z;
+
+void main()
+{
+    float object_z_row = z_to_texture_row * object_z;
+    // Index of the row in the texture.
+    float z_texture_row = floor(object_z_row);
+    // Normalized coordinate from 0. to 1.
+    float z_texture_col = object_z_row - z_texture_row;
+    float z_blend = 0.25 * cos(min(M_PI, abs(M_PI * (object_z - z_cursor) * 1.8 / z_cursor_band_width))) + 0.25;
+    // Calculate level of detail from the object Z coordinate.
+    // This makes the slowly sloping surfaces to be shown with high detail (with stripes),
+    // and the vertical surfaces to be shown with low detail (no stripes)
+    float z_in_cells = object_z_row * 190.;
+    // Gradient of Z projected on the screen.
+    float dx_vtc = dFdx(z_in_cells);
+    float dy_vtc = dFdy(z_in_cells);
+    float lod = clamp(0.5 * log2(max(dx_vtc * dx_vtc, dy_vtc * dy_vtc)), 0., 1.);
+    // Sample the Z texture. Texture coordinates are normalized to <0, 1>.
+    vec4 color = vec4(0.25, 0.25, 0.25, 1.0);
+    if (z_texture_row >= 0.0)
+        color = mix(texture(z_texture, vec2(z_texture_col, z_texture_row_to_normalized * (z_texture_row + 0.5    )), -10000.),
+                    texture(z_texture, vec2(z_texture_col, z_texture_row_to_normalized * (z_texture_row * 2. + 1.)),  10000.), lod);            
+    // Mix the final color.
+    gl_FragColor = vec4(vec3(intensity.y), 1.0) +  intensity.x * mix(color, vec4(1.0, 1.0, 0.0, 1.0), z_blend);
+}

resources/shaders/140/variable_layer_height.vs

@@ -0,0 +1,60 @@
+#version 140
+
+#define INTENSITY_CORRECTION 0.6
+
+const vec3 LIGHT_TOP_DIR = vec3(-0.4574957, 0.4574957, 0.7624929);
+#define LIGHT_TOP_DIFFUSE    (0.8 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SPECULAR   (0.125 * INTENSITY_CORRECTION)
+#define LIGHT_TOP_SHININESS  20.0
+
+const vec3 LIGHT_FRONT_DIR = vec3(0.6985074, 0.1397015, 0.6985074);
+#define LIGHT_FRONT_DIFFUSE  (0.3 * INTENSITY_CORRECTION)
+//#define LIGHT_FRONT_SPECULAR (0.0 * INTENSITY_CORRECTION)
+//#define LIGHT_FRONT_SHININESS 5.0
+
+#define INTENSITY_AMBIENT    0.3
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+uniform mat3 normal_matrix;
+uniform mat4 volume_world_matrix;
+uniform float object_max_z;
+
+in vec3 v_position;
+in vec3 v_normal;
+in vec2 v_tex_coord;
+
+// x = tainted, y = specular;
+out vec2 intensity;
+
+out float object_z;
+
+void main()
+{
+	// =====================================================
+	// NOTE:
+	// when object_max_z > 0.0  we are rendering the overlay
+	// when object_max_z == 0.0 we are rendering the volumes
+	// =====================================================
+
+    // First transform the normal into camera space and normalize the result.
+    vec3 normal = (object_max_z > 0.0) ? vec3(0.0, 0.0, 1.0) : normalize(normal_matrix * v_normal);
+    
+    // Compute the cos of the angle between the normal and lights direction. The light is directional so the direction is constant for every vertex.
+    // Since these two are normalized the cosine is the dot product. We also need to clamp the result to the [0,1] range.
+    float NdotL = max(dot(normal, LIGHT_TOP_DIR), 0.0);
+
+    intensity.x = INTENSITY_AMBIENT + NdotL * LIGHT_TOP_DIFFUSE;
+    vec4 position = view_model_matrix * vec4(v_position, 1.0);
+    intensity.y = LIGHT_TOP_SPECULAR * pow(max(dot(-normalize(position.xyz), reflect(-LIGHT_TOP_DIR, normal)), 0.0), LIGHT_TOP_SHININESS);
+
+    // Perform the same lighting calculation for the 2nd light source (no specular)
+    NdotL = max(dot(normal, LIGHT_FRONT_DIR), 0.0);
+    
+    intensity.x += NdotL * LIGHT_FRONT_DIFFUSE;
+
+    // Scaled to widths of the Z texture.
+    object_z = (object_max_z > 0.0) ? object_max_z * v_tex_coord.y : (volume_world_matrix * vec4(v_position, 1.0)).z;
+        
+    gl_Position = projection_matrix * position;
+}

src/slic3r/GUI/3DBed.cpp

@@ -130,11 +130,7 @@ void Bed3D::Axes::render()
     if (!m_arrow.is_initialized())
         m_arrow.init_from(stilized_arrow(16, DefaultTipRadius, DefaultTipLength, DefaultStemRadius, m_stem_length));
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 
@@ -620,11 +616,7 @@ void Bed3D::render_texture(bool bottom, GLCanvas3D& canvas)
 #if ENABLE_LEGACY_OPENGL_REMOVAL
     init_triangles();
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("printbed_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("printbed");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES
@@ -748,11 +740,7 @@ void Bed3D::render_model()
     }
 
     if (!m_model.get_filename().empty()) {
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
         GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         if (shader != nullptr) {
             shader->start_using();
             shader->set_uniform("emission_factor", 0.0f);
@@ -816,11 +804,7 @@ void Bed3D::render_default(bool bottom, bool picking)
     init_gridlines();
     init_triangles();
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 

src/slic3r/GUI/3DScene.cpp

@@ -1085,14 +1085,8 @@ void GLVolumeCollection::render(GLVolumeCollection::ERenderType type, bool disab
         return;
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* sink_shader = GUI::wxGetApp().get_shader("flat_attr");
-    GLShaderProgram* edges_shader = GUI::wxGetApp().get_shader("flat_attr");
-    assert(boost::algorithm::iends_with(shader->get_name(), "_attr"));
-#else
     GLShaderProgram* sink_shader  = GUI::wxGetApp().get_shader("flat");
     GLShaderProgram* edges_shader = GUI::wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 #endif // ENABLE_LEGACY_OPENGL_REMOVAL
 
     if (type == ERenderType::Transparent) {

src/slic3r/GUI/GCodeViewer.cpp

@@ -184,11 +184,7 @@ void GCodeViewer::COG::render()
 
     init();
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("toolpaths_cog_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("toolpaths_cog");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 
@@ -331,11 +327,7 @@ void GCodeViewer::SequentialView::Marker::render()
     if (!m_visible)
         return;
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 
@@ -703,11 +695,7 @@ void GCodeViewer::init()
 #if !DISABLE_GCODEVIEWER_INSTANCED_MODELS
             if (wxGetApp().is_gl_version_greater_or_equal_to(3, 3)) {
                 buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::InstancedModel;
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-                buffer.shader = "gouraud_light_instanced_attr";
-#else
                 buffer.shader = "gouraud_light_instanced";
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
                 buffer.model.model.init_from(diamond(16));
                 buffer.model.color = option_color(type);
                 buffer.model.instances.format = InstanceVBuffer::EFormat::InstancedModel;
@@ -716,12 +704,7 @@ void GCodeViewer::init()
 #endif // !DISABLE_GCODEVIEWER_INSTANCED_MODELS
                 buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::BatchedModel;
                 buffer.vertices.format = VBuffer::EFormat::PositionNormal3;
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-                buffer.shader = "gouraud_light_attr";
-#else
                 buffer.shader = "gouraud_light";
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
-
                 buffer.model.data = diamond(16);
                 buffer.model.color = option_color(type);
                 buffer.model.instances.format = InstanceVBuffer::EFormat::BatchedModel;
@@ -734,18 +717,14 @@ void GCodeViewer::init()
         case EMoveType::Extrude: {
             buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::Triangle;
             buffer.vertices.format = VBuffer::EFormat::PositionNormal3;
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-            buffer.shader = "gouraud_light_attr";
-#else
             buffer.shader = "gouraud_light";
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
             break;
         }
         case EMoveType::Travel: {
             buffer.render_primitive_type = TBuffer::ERenderPrimitiveType::Line;
 #if ENABLE_GL_SHADERS_ATTRIBUTES
             buffer.vertices.format = VBuffer::EFormat::Position;
-            buffer.shader = "flat_attr";
+            buffer.shader = "flat";
 #else
             buffer.vertices.format = VBuffer::EFormat::PositionNormal3;
             buffer.shader = "toolpaths_lines";
@@ -3167,11 +3146,8 @@ void GCodeViewer::render_toolpaths()
             const int position_id = shader->get_attrib_location("v_position");
             const int normal_id   = shader->get_attrib_location("v_normal");
 #else
-            switch (buffer.render_primitive_type) {
-            case TBuffer::ERenderPrimitiveType::Point: shader_init_as_points(*shader); break;
-            case TBuffer::ERenderPrimitiveType::Line:  shader_init_as_lines(*shader); break;
-            default: break;
-            }
+            if (buffer.render_primitive_type == TBuffer::ERenderPrimitiveType::Line)
+                shader_init_as_lines(*shader);
 #endif // ENABLE_GL_SHADERS_ATTRIBUTES
             const int uniform_color = shader->get_uniform_location("uniform_color");
 
@@ -3328,11 +3304,7 @@ void GCodeViewer::render_shells()
     if (!m_shells.visible || m_shells.volumes.empty())
         return;
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 

src/slic3r/GUI/GLCanvas3D.cpp

@@ -161,11 +161,7 @@ void GLCanvas3D::LayersEditing::select_object(const Model &model, int object_id)
 
 bool GLCanvas3D::LayersEditing::is_allowed() const
 {
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    return wxGetApp().get_shader("variable_layer_height_attr") != nullptr && m_z_texture_id > 0;
-#else
     return wxGetApp().get_shader("variable_layer_height") != nullptr && m_z_texture_id > 0;
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 }
 
 bool GLCanvas3D::LayersEditing::is_enabled() const
@@ -328,11 +324,7 @@ Rect GLCanvas3D::LayersEditing::get_bar_rect_viewport(const GLCanvas3D& canvas)
 
 bool GLCanvas3D::LayersEditing::is_initialized() const
 {
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    return wxGetApp().get_shader("variable_layer_height_attr") != nullptr;
-#else
     return wxGetApp().get_shader("variable_layer_height") != nullptr;
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 }
 
 std::string GLCanvas3D::LayersEditing::get_tooltip(const GLCanvas3D& canvas) const
@@ -375,11 +367,8 @@ void GLCanvas3D::LayersEditing::render_active_object_annotations(const GLCanvas3
         return;
 
     const float cnv_inv_width = 1.0f / cnv_width;
-
-    GLShaderProgram* shader = wxGetApp().get_shader("variable_layer_height_attr");
-#else
-    GLShaderProgram* shader = wxGetApp().get_shader("variable_layer_height");
 #endif // ENABLE_GL_SHADERS_ATTRIBUTES
+    GLShaderProgram* shader = wxGetApp().get_shader("variable_layer_height");
     if (shader == nullptr)
         return;
 
@@ -550,11 +539,7 @@ void GLCanvas3D::LayersEditing::render_profile(const Rect& bar_rect)
         m_profile.profile.init_from(std::move(init_data));
     }
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES
@@ -594,11 +579,7 @@ void GLCanvas3D::LayersEditing::render_volumes(const GLCanvas3D& canvas, const G
     if (current_shader != nullptr)
         current_shader->stop_using();
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("variable_layer_height_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("variable_layer_height");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 
@@ -1075,11 +1056,7 @@ void GLCanvas3D::SequentialPrintClearance::render()
     const ColorRGBA NO_FILL_COLOR = { 1.0f, 1.0f, 1.0f, 0.75f };
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 #else
     GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
 #endif // ENABLE_LEGACY_OPENGL_REMOVAL
@@ -4608,11 +4585,7 @@ void GLCanvas3D::_render_thumbnail_internal(ThumbnailData& thumbnail_data, const
 
     camera.apply_projection(volumes_box, near_z, far_z);
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 
@@ -5551,11 +5524,7 @@ void GLCanvas3D::_render_background()
         m_background.init_from(std::move(init_data));
     }
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("background_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("background");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
         shader->set_uniform("top_color", use_error_color ? ERROR_BG_LIGHT_COLOR : DEFAULT_BG_LIGHT_COLOR);
@@ -5681,11 +5650,7 @@ void GLCanvas3D::_render_objects(GLVolumeCollection::ERenderType type)
     m_volumes.set_show_non_manifold_edges(!m_gizmos.is_hiding_instances() && m_gizmos.get_current_type() != GLGizmosManager::Simplify);
 #endif // ENABLE_SHOW_NON_MANIFOLD_EDGES
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("gouraud");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 
@@ -5910,11 +5875,7 @@ void GLCanvas3D::_render_overlays()
 void GLCanvas3D::_render_volumes_for_picking() const
 {
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 #endif // ENABLE_LEGACY_OPENGL_REMOVAL
@@ -6137,11 +6098,7 @@ void GLCanvas3D::_render_camera_target()
         }
     }
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES
@@ -6322,11 +6279,7 @@ void GLCanvas3D::_render_sla_slices()
         }
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
         GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         if (shader != nullptr) {
             shader->start_using();
 

src/slic3r/GUI/GLModel.cpp

@@ -861,7 +861,7 @@ void GLModel::render(const std::pair<size_t, size_t>& range)
 #if ENABLE_GL_SHADERS_ATTRIBUTES
         position_id = shader->get_attrib_location("v_position");
         if (position_id != -1) {
-            glsafe(::glVertexAttribPointer(position_id, Geometry::position_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (GLvoid*)Geometry::position_offset_bytes(data.format)));
+            glsafe(::glVertexAttribPointer(position_id, Geometry::position_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (const void*)Geometry::position_offset_bytes(data.format)));
             glsafe(::glEnableVertexAttribArray(position_id));
         }
 #else
@@ -873,7 +873,7 @@ void GLModel::render(const std::pair<size_t, size_t>& range)
 #if ENABLE_GL_SHADERS_ATTRIBUTES
         normal_id = shader->get_attrib_location("v_normal");
         if (normal_id != -1) {
-            glsafe(::glVertexAttribPointer(normal_id, Geometry::normal_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (GLvoid*)Geometry::normal_offset_bytes(data.format)));
+            glsafe(::glVertexAttribPointer(normal_id, Geometry::normal_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (const void*)Geometry::normal_offset_bytes(data.format)));
             glsafe(::glEnableVertexAttribArray(normal_id));
         }
 #else
@@ -885,7 +885,7 @@ void GLModel::render(const std::pair<size_t, size_t>& range)
 #if ENABLE_GL_SHADERS_ATTRIBUTES
         tex_coord_id = shader->get_attrib_location("v_tex_coord");
         if (tex_coord_id != -1) {
-            glsafe(::glVertexAttribPointer(tex_coord_id, Geometry::tex_coord_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (GLvoid*)Geometry::tex_coord_offset_bytes(data.format)));
+            glsafe(::glVertexAttribPointer(tex_coord_id, Geometry::tex_coord_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (const void*)Geometry::tex_coord_offset_bytes(data.format)));
             glsafe(::glEnableVertexAttribArray(tex_coord_id));
         }
 #else
@@ -930,16 +930,12 @@ void GLModel::render_instanced(unsigned int instances_vbo, unsigned int instance
 void GLModel::render_instanced(unsigned int instances_vbo, unsigned int instances_count) const
 #endif // ENABLE_LEGACY_OPENGL_REMOVAL
 {
-    if (instances_vbo == 0)
+    if (instances_vbo == 0 || instances_count == 0)
         return;
 
     GLShaderProgram* shader = wxGetApp().get_current_shader();
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    if (shader == nullptr || !boost::algorithm::iends_with(shader->get_name(), "_instanced_attr"))
-#else
     if (shader == nullptr || !boost::algorithm::iends_with(shader->get_name(), "_instanced"))
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         return;
 
     // vertex attributes
@@ -974,11 +970,12 @@ void GLModel::render_instanced(unsigned int instances_vbo, unsigned int instance
 
     glsafe(::glBindBuffer(GL_ARRAY_BUFFER, instances_vbo));
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-    glsafe(::glVertexAttribPointer(offset_id, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (GLvoid*)0));
+    const size_t instance_stride = 5 * sizeof(float);
+    glsafe(::glVertexAttribPointer(offset_id, 3, GL_FLOAT, GL_FALSE, instance_stride, (const void*)0));
     glsafe(::glEnableVertexAttribArray(offset_id));
     glsafe(::glVertexAttribDivisor(offset_id, 1));
 
-    glsafe(::glVertexAttribPointer(scales_id, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (GLvoid*)(3 * sizeof(float))));
+    glsafe(::glVertexAttribPointer(scales_id, 2, GL_FLOAT, GL_FALSE, instance_stride, (const void*)(3 * sizeof(float))));
     glsafe(::glEnableVertexAttribArray(scales_id));
     glsafe(::glVertexAttribDivisor(scales_id, 1));
 #else
@@ -1000,8 +997,6 @@ void GLModel::render_instanced(unsigned int instances_vbo, unsigned int instance
     const GLenum mode = get_primitive_mode(data.format);
     const GLenum index_type = get_index_type(data);
 
-    shader->set_uniform("uniform_color", data.color);
-
     const size_t vertex_stride_bytes = Geometry::vertex_stride_bytes(data.format);
     const bool position = Geometry::has_position(data.format);
     const bool normal   = Geometry::has_normal(data.format);
@@ -1009,15 +1004,17 @@ void GLModel::render_instanced(unsigned int instances_vbo, unsigned int instance
     glsafe(::glBindBuffer(GL_ARRAY_BUFFER, m_render_data.vbo_id));
 
     if (position) {
-        glsafe(::glVertexAttribPointer(position_id, Geometry::position_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (GLvoid*)Geometry::position_offset_bytes(data.format)));
+        glsafe(::glVertexAttribPointer(position_id, Geometry::position_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (const void*)Geometry::position_offset_bytes(data.format)));
         glsafe(::glEnableVertexAttribArray(position_id));
     }
 
     if (normal) {
-        glsafe(::glVertexAttribPointer(normal_id, Geometry::normal_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (GLvoid*)Geometry::normal_offset_bytes(data.format)));
+        glsafe(::glVertexAttribPointer(normal_id, Geometry::normal_stride_floats(data.format), GL_FLOAT, GL_FALSE, vertex_stride_bytes, (const void*)Geometry::normal_offset_bytes(data.format)));
         glsafe(::glEnableVertexAttribArray(normal_id));
     }
 
+    shader->set_uniform("uniform_color", data.color);
+
     glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_render_data.ibo_id));
     glsafe(::glDrawElementsInstanced(mode, indices_count(), index_type, (const void*)0, instances_count));
     glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));

src/slic3r/GUI/GLSelectionRectangle.cpp

@@ -131,11 +131,7 @@ namespace GUI {
         glsafe(::glEnable(GL_LINE_STIPPLE));
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
         GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         if (shader != nullptr) {
             shader->start_using();
 

src/slic3r/GUI/GLShadersManager.cpp

@@ -35,14 +35,15 @@ std::pair<bool, std::string> GLShadersManager::init()
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
 #if ENABLE_GL_SHADERS_ATTRIBUTES
+    const std::string prefix = !GUI::wxGetApp().is_gl_version_greater_or_equal_to(3, 1) ? "140/" : "110/";
     // imgui shader
-    valid &= append_shader("imgui", { "imgui.vs", "imgui.fs" });
+    valid &= append_shader("imgui", { prefix + "imgui.vs", prefix + "imgui.fs" });
     // basic shader, used to render all what was previously rendered using the immediate mode
-    valid &= append_shader("flat_attr", { "flat_attr.vs", "flat.fs" });
+    valid &= append_shader("flat", { prefix + "flat.vs", prefix + "flat.fs" });
     // basic shader for textures, used to render textures
-    valid &= append_shader("flat_texture_attr", { "flat_texture_attr.vs", "flat_texture.fs" });
+    valid &= append_shader("flat_texture", { prefix + "flat_texture.vs", prefix + "flat_texture.fs" });
     // used to render 3D scene background
-    valid &= append_shader("background_attr", { "background_attr.vs", "background.fs" });
+    valid &= append_shader("background", { prefix + "background.vs", prefix + "background.fs" });
 #else
     // basic shader, used to render all what was previously rendered using the immediate mode
     valid &= append_shader("flat", { "flat.vs", "flat.fs" });
@@ -55,16 +56,16 @@ std::pair<bool, std::string> GLShadersManager::init()
 #if ENABLE_SHOW_TOOLPATHS_COG
     // used to render toolpaths center of gravity
 #if ENABLE_GL_SHADERS_ATTRIBUTES
-    valid &= append_shader("toolpaths_cog_attr", { "toolpaths_cog_attr.vs", "toolpaths_cog.fs" });
+    valid &= append_shader("toolpaths_cog", { prefix + "toolpaths_cog.vs", prefix + "toolpaths_cog.fs" });
 #else
     valid &= append_shader("toolpaths_cog", { "toolpaths_cog.vs", "toolpaths_cog.fs" });
 #endif // ENABLE_GL_SHADERS_ATTRIBUTES
 #endif // ENABLE_SHOW_TOOLPATHS_COG
 #if ENABLE_GL_SHADERS_ATTRIBUTES
     // used to render bed axes and model, selection hints, gcode sequential view marker model, preview shells, options in gcode preview
-    valid &= append_shader("gouraud_light_attr", { "gouraud_light_attr.vs", "gouraud_light.fs" });
+    valid &= append_shader("gouraud_light", { prefix + "gouraud_light.vs", prefix + "gouraud_light.fs" });
     // used to render printbed
-    valid &= append_shader("printbed_attr", { "printbed_attr.vs", "printbed.fs" });
+    valid &= append_shader("printbed", { prefix + "printbed.vs", prefix + "printbed.fs" });
 #else
     // used to render bed axes and model, selection hints, gcode sequential view marker model, preview shells, options in gcode preview
     valid &= append_shader("gouraud_light", { "gouraud_light.vs", "gouraud_light.fs" });
@@ -74,14 +75,14 @@ std::pair<bool, std::string> GLShadersManager::init()
     // used to render options in gcode preview
     if (GUI::wxGetApp().is_gl_version_greater_or_equal_to(3, 3)) {
 #if ENABLE_GL_SHADERS_ATTRIBUTES
-        valid &= append_shader("gouraud_light_instanced_attr", { "gouraud_light_instanced_attr.vs", "gouraud_light_instanced.fs" });
+        valid &= append_shader("gouraud_light_instanced", { prefix + "gouraud_light_instanced.vs", prefix + "gouraud_light_instanced.fs" });
 #else
         valid &= append_shader("gouraud_light_instanced", { "gouraud_light_instanced.vs", "gouraud_light_instanced.fs" });
 #endif // ENABLE_GL_SHADERS_ATTRIBUTES
     }
 #if ENABLE_GL_SHADERS_ATTRIBUTES
     // used to render objects in 3d editor
-    valid &= append_shader("gouraud_attr", { "gouraud_attr.vs", "gouraud.fs" }
+    valid &= append_shader("gouraud", { prefix + "gouraud.vs", prefix + "gouraud.fs" }
 #else
     // used to render extrusion and travel paths as lines in gcode preview
     valid &= append_shader("toolpaths_lines", { "toolpaths_lines.vs", "toolpaths_lines.fs" });
@@ -94,9 +95,9 @@ std::pair<bool, std::string> GLShadersManager::init()
         );
 #if ENABLE_GL_SHADERS_ATTRIBUTES
     // used to render variable layers heights in 3d editor
-    valid &= append_shader("variable_layer_height_attr", { "variable_layer_height_attr.vs", "variable_layer_height.fs" });
+    valid &= append_shader("variable_layer_height", { prefix + "variable_layer_height.vs", prefix + "variable_layer_height.fs" });
     // used to render highlight contour around selected triangles inside the multi-material gizmo
-    valid &= append_shader("mm_contour_attr", { "mm_contour_attr.vs", "mm_contour_attr.fs" });
+    valid &= append_shader("mm_contour", { prefix + "mm_contour.vs", prefix + "mm_contour.fs" });
 #else
     // used to render variable layers heights in 3d editor
     valid &= append_shader("variable_layer_height", { "variable_layer_height.vs", "variable_layer_height.fs" });
@@ -111,9 +112,9 @@ std::pair<bool, std::string> GLShadersManager::init()
     // triangle normals inside fragment shader have the right direction.
 #if ENABLE_GL_SHADERS_ATTRIBUTES
     if (platform_flavor() == PlatformFlavor::OSXOnArm && wxPlatformInfo::Get().GetOSMajorVersion() < 12)
-        valid &= append_shader("mm_gouraud_attr", { "mm_gouraud_attr.vs", "mm_gouraud_attr.fs" }, { "FLIP_TRIANGLE_NORMALS"sv });
+        valid &= append_shader("mm_gouraud", { prefix + "mm_gouraud.vs", prefix + "mm_gouraud.fs" }, { "FLIP_TRIANGLE_NORMALS"sv });
     else
-        valid &= append_shader("mm_gouraud_attr", { "mm_gouraud_attr.vs", "mm_gouraud_attr.fs" });
+        valid &= append_shader("mm_gouraud", { prefix + "mm_gouraud.vs", prefix + "mm_gouraud.fs" });
 #else
     if (platform_flavor() == PlatformFlavor::OSXOnArm && wxPlatformInfo::Get().GetOSMajorVersion() < 12)
         valid &= append_shader("mm_gouraud", {"mm_gouraud.vs", "mm_gouraud.fs"}, {"FLIP_TRIANGLE_NORMALS"sv});

src/slic3r/GUI/GLTexture.cpp

@@ -358,11 +358,7 @@ void GLTexture::render_sub_texture(unsigned int tex_id, float left, float right,
     GLModel model;
     model.init_from(std::move(init_data));
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_texture_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat_texture");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES

src/slic3r/GUI/Gizmos/GLGizmoBase.cpp

@@ -134,11 +134,7 @@ void GLGizmoBase::render_grabbers(const BoundingBoxf3& box) const
 
 void GLGizmoBase::render_grabbers(float size) const
 {
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
     shader->start_using();
@@ -153,11 +149,7 @@ void GLGizmoBase::render_grabbers(float size) const
 void GLGizmoBase::render_grabbers_for_picking(const BoundingBoxf3& box) const
 {
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 #endif // ENABLE_LEGACY_OPENGL_REMOVAL

src/slic3r/GUI/Gizmos/GLGizmoCut.cpp

@@ -107,11 +107,7 @@ void GLGizmoCut::on_render()
     glsafe(::glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA));
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
         const Vec3d diff = plane_center - m_old_center;
@@ -197,11 +193,7 @@ void GLGizmoCut::on_render()
         shader->stop_using();
     }
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
     shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 #else
     glsafe(::glColor3f(1.0, 1.0, 0.0));
     ::glBegin(GL_LINES);
@@ -222,11 +214,7 @@ void GLGizmoCut::on_render()
     }
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    shader = wxGetApp().get_shader("flat_attr");
-#else
     shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 #endif // ENABLE_LEGACY_OPENGL_REMOVAL

src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp

@@ -105,11 +105,7 @@ void GLGizmoFlatten::on_render()
     const Selection& selection = m_parent.get_selection();
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
     
@@ -165,11 +161,7 @@ void GLGizmoFlatten::on_render_for_picking()
     const Selection& selection = m_parent.get_selection();
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 

src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp

@@ -104,11 +104,7 @@ void GLGizmoHollow::on_render_for_picking()
 void GLGizmoHollow::render_points(const Selection& selection, bool picking)
 {
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = picking ? wxGetApp().get_shader("flat_attr") : wxGetApp().get_shader("gouraud_light_attr");
-#else
     GLShaderProgram* shader = picking ? wxGetApp().get_shader("flat") : wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 

src/slic3r/GUI/Gizmos/GLGizmoMmuSegmentation.cpp

@@ -170,11 +170,7 @@ void GLGizmoMmuSegmentation::data_changed()
 void GLGizmoMmuSegmentation::render_triangles(const Selection &selection) const
 {
     ClippingPlaneDataWrapper clp_data = this->get_clipping_plane_data();
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    auto* shader = wxGetApp().get_shader("mm_gouraud_attr");
-#else
     auto                    *shader   = wxGetApp().get_shader("mm_gouraud");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (!shader)
         return;
     shader->start_using();
@@ -598,16 +594,13 @@ void TriangleSelectorMmGui::render(ImGuiWrapper *imgui)
     auto *shader = wxGetApp().get_current_shader();
     if (!shader)
         return;
+    assert(shader->get_name() == "mm_gouraud");
 #if ENABLE_GL_SHADERS_ATTRIBUTES
-    assert(shader->get_name() == "mm_gouraud_attr");
-
     const Camera& camera = wxGetApp().plater()->get_camera();
     const Transform3d view_model_matrix = camera.get_view_matrix() * matrix;
     shader->set_uniform("view_model_matrix", view_model_matrix);
     shader->set_uniform("projection_matrix", camera.get_projection_matrix());
     shader->set_uniform("normal_matrix", (Matrix3d)view_model_matrix.matrix().block(0, 0, 3, 3).inverse().transpose());
-#else
-    assert(shader->get_name() == "mm_gouraud");
 #endif // ENABLE_GL_SHADERS_ATTRIBUTES
 
     for (size_t color_idx = 0; color_idx < m_gizmo_scene.triangle_indices.size(); ++color_idx) {

src/slic3r/GUI/Gizmos/GLGizmoMove.cpp

@@ -154,11 +154,7 @@ void GLGizmoMove3D::on_render()
 
     if (m_hover_id == -1) {
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
         GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         if (shader != nullptr) {
             shader->start_using();
 #endif // ENABLE_LEGACY_OPENGL_REMOVAL
@@ -199,11 +195,7 @@ void GLGizmoMove3D::on_render()
     else {
         // draw axis
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
         GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         if (shader != nullptr) {
             shader->start_using();
 
@@ -217,11 +209,7 @@ void GLGizmoMove3D::on_render()
             shader->stop_using();
         }
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
         shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 #else
         glsafe(::glColor4fv(AXES_COLOR[m_hover_id].data()));
         ::glBegin(GL_LINES);
@@ -286,11 +274,7 @@ void GLGizmoMove3D::render_grabber_extension(Axis axis, const BoundingBoxf3& box
     const double size = m_dragging ? double(m_grabbers[axis].get_dragging_half_size(mean_size)) : double(m_grabbers[axis].get_half_size(mean_size));
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader(picking ? "flat_attr" : "gouraud_light_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader(picking ? "flat" : "gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 #else
     GLShaderProgram* shader = wxGetApp().get_shader("gouraud_light");
 #endif // ENABLE_LEGACY_OPENGL_REMOVAL

src/slic3r/GUI/Gizmos/GLGizmoPainterBase.cpp

@@ -80,11 +80,7 @@ GLGizmoPainterBase::ClippingPlaneDataWrapper GLGizmoPainterBase::get_clipping_pl
 
 void GLGizmoPainterBase::render_triangles(const Selection& selection) const
 {
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    auto* shader = wxGetApp().get_shader("gouraud_attr");
-#else
     auto* shader = wxGetApp().get_shader("gouraud");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (! shader)
         return;
     shader->start_using();
@@ -250,11 +246,7 @@ void GLGizmoPainterBase::render_cursor_circle()
         m_circle.init_from(std::move(init_data));
     }
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = GUI::wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES
@@ -292,11 +284,7 @@ void GLGizmoPainterBase::render_cursor_sphere(const Transform3d& trafo) const
 #endif // ENABLE_LEGACY_OPENGL_REMOVAL
     }
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 
@@ -927,11 +915,9 @@ void TriangleSelectorGUI::render(ImGuiWrapper* imgui)
     auto* shader = wxGetApp().get_current_shader();
     if (! shader)
         return;
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    assert(shader->get_name() == "gouraud_attr");
-#else
+
     assert(shader->get_name() == "gouraud");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
+
     ScopeGuard guard([shader]() { if (shader) shader->set_uniform("offset_depth_buffer", false);});
     shader->set_uniform("offset_depth_buffer", true);
     for (auto iva : {std::make_pair(&m_iva_enforcers, enforcers_color),
@@ -1288,11 +1274,7 @@ void TriangleSelectorGUI::render_debug(ImGuiWrapper* imgui)
     if (curr_shader != nullptr)
         curr_shader->stop_using();
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 
@@ -1375,11 +1357,7 @@ void TriangleSelectorGUI::render_paint_contour()
     if (curr_shader != nullptr)
         curr_shader->stop_using();
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    auto* contour_shader = wxGetApp().get_shader("mm_contour_attr");
-#else
     auto* contour_shader = wxGetApp().get_shader("mm_contour");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (contour_shader != nullptr) {
         contour_shader->start_using();
 

src/slic3r/GUI/Gizmos/GLGizmoRotate.cpp

@@ -172,11 +172,7 @@ void GLGizmoRotate::on_render()
 
     glsafe(::glLineWidth((m_hover_id != -1) ? 2.0f : 1.5f));
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 
@@ -576,11 +572,7 @@ void GLGizmoRotate::render_grabber_extension(const BoundingBoxf3& box, bool pick
     const double size = m_dragging ? double(m_grabbers.front().get_dragging_half_size(mean_size)) : double(m_grabbers.front().get_half_size(mean_size));
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader(picking ? "flat_attr" : "gouraud_light_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader(picking ? "flat" : "gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 

src/slic3r/GUI/Gizmos/GLGizmoScale.cpp

@@ -265,11 +265,7 @@ void GLGizmoScale3D::on_render()
     if (m_hover_id == -1) {
 #if ENABLE_LEGACY_OPENGL_REMOVAL
         // draw connections
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
         GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         if (shader != nullptr) {
             shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES
@@ -316,11 +312,7 @@ void GLGizmoScale3D::on_render()
     else if (m_hover_id == 0 || m_hover_id == 1) {
 #if ENABLE_LEGACY_OPENGL_REMOVAL
         // draw connections
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
         GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         if (shader != nullptr) {
             shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES
@@ -333,11 +325,7 @@ void GLGizmoScale3D::on_render()
         }
 
         // draw grabbers
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
         shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 #else
         // draw connection
         glsafe(::glColor4fv(m_grabbers[0].color.data()));
@@ -357,11 +345,7 @@ void GLGizmoScale3D::on_render()
     else if (m_hover_id == 2 || m_hover_id == 3) {
 #if ENABLE_LEGACY_OPENGL_REMOVAL
         // draw connections
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
         GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         if (shader != nullptr) {
             shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES
@@ -374,11 +358,7 @@ void GLGizmoScale3D::on_render()
         }
 
         // draw grabbers
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
         shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 #else
         // draw connection
         glsafe(::glColor4fv(m_grabbers[2].color.data()));
@@ -398,11 +378,7 @@ void GLGizmoScale3D::on_render()
     else if (m_hover_id == 4 || m_hover_id == 5) {
 #if ENABLE_LEGACY_OPENGL_REMOVAL
         // draw connections
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
         GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         if (shader != nullptr) {
             shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES
@@ -415,11 +391,7 @@ void GLGizmoScale3D::on_render()
         }
 
         // draw grabbers
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
         shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 #else
         // draw connection
         glsafe(::glColor4fv(m_grabbers[4].color.data()));
@@ -439,11 +411,7 @@ void GLGizmoScale3D::on_render()
     else if (m_hover_id >= 6) {
 #if ENABLE_LEGACY_OPENGL_REMOVAL
         // draw connections
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
         GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
         if (shader != nullptr) {
             shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES
@@ -459,11 +427,7 @@ void GLGizmoScale3D::on_render()
         }
 
         // draw grabbers
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
         shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
 #else
         // draw connection
         glsafe(::glColor4fv(m_drag_color.data()));

src/slic3r/GUI/Gizmos/GLGizmoSimplify.cpp

@@ -737,14 +737,11 @@ void GLGizmoSimplify::on_render()
         GLModel &glmodel = it->second;
 
         const Transform3d trafo_matrix = selected_volume->world_matrix();
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-        auto* gouraud_shader = wxGetApp().get_shader("gouraud_light_attr");
-#else
+#if !ENABLE_GL_SHADERS_ATTRIBUTES
         glsafe(::glPushMatrix());
         glsafe(::glMultMatrixd(trafo_matrix.data()));
-
-        auto *gouraud_shader = wxGetApp().get_shader("gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
+#endif // !ENABLE_GL_SHADERS_ATTRIBUTES
+        auto* gouraud_shader = wxGetApp().get_shader("gouraud_light");
         glsafe(::glPushAttrib(GL_DEPTH_TEST));
         glsafe(::glEnable(GL_DEPTH_TEST));
         gouraud_shader->start_using();
@@ -759,11 +756,7 @@ void GLGizmoSimplify::on_render()
         gouraud_shader->stop_using();
 
         if (m_show_wireframe) {
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-            auto* contour_shader = wxGetApp().get_shader("mm_contour_attr");
-#else
             auto *contour_shader = wxGetApp().get_shader("mm_contour");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
             contour_shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES
             contour_shader->set_uniform("view_model_matrix", view_model_matrix);

src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp

@@ -130,11 +130,7 @@ void GLGizmoSlaSupports::render_points(const Selection& selection, bool picking)
         return;
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = picking ? wxGetApp().get_shader("flat_attr") : wxGetApp().get_shader("gouraud_light_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader(picking ? "flat" : "gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 

src/slic3r/GUI/ImGuiWrapper.cpp

@@ -1475,10 +1475,10 @@ void ImGuiWrapper::render_draw_data(ImDrawData *draw_data)
 
     // We are using the OpenGL fixed pipeline to make the example code simpler to read!
     // Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, vertex/texcoord/color pointers, polygon fill.
-    GLint last_texture; glsafe(::glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
-    GLint last_polygon_mode[2]; glsafe(::glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode));
-    GLint last_viewport[4]; glsafe(::glGetIntegerv(GL_VIEWPORT, last_viewport));
-    GLint last_scissor_box[4]; glsafe(::glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box));
+    GLint last_texture;          glsafe(::glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture));
+    GLint last_polygon_mode[2];  glsafe(::glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode));
+    GLint last_viewport[4];      glsafe(::glGetIntegerv(GL_VIEWPORT, last_viewport));
+    GLint last_scissor_box[4];   glsafe(::glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box));
     GLint last_texture_env_mode; glsafe(::glGetTexEnviv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, &last_texture_env_mode));
     glsafe(::glPushAttrib(GL_ENABLE_BIT | GL_COLOR_BUFFER_BIT | GL_TRANSFORM_BIT));
     glsafe(::glEnable(GL_BLEND));
@@ -1528,19 +1528,15 @@ void ImGuiWrapper::render_draw_data(ImDrawData *draw_data)
     glsafe(::glLoadIdentity());
 #endif // ENABLE_GL_IMGUI_SHADERS
 
-#if ENABLE_GL_IMGUI_SHADERS
     // Will project scissor/clipping rectangles into framebuffer space
-    const ImVec2 clip_off   = draw_data->DisplayPos;         // (0,0) unless using multi-viewports
+    const ImVec2 clip_off   = draw_data->DisplayPos;       // (0,0) unless using multi-viewports
     const ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
-#else
-    const ImVec2 pos = draw_data->DisplayPos;
-#endif // ENABLE_GL_IMGUI_SHADERS
 
     // Render command lists
     for (int n = 0; n < draw_data->CmdListsCount; ++n) {
         const ImDrawList* cmd_list = draw_data->CmdLists[n];
         const ImDrawVert* vtx_buffer = cmd_list->VtxBuffer.Data;
-        const ImDrawIdx* idx_buffer = cmd_list->IdxBuffer.Data;
+        const ImDrawIdx* idx_buffer  = cmd_list->IdxBuffer.Data;
 #if ENABLE_GL_IMGUI_SHADERS
         const GLsizeiptr vtx_buffer_size = (GLsizeiptr)cmd_list->VtxBuffer.Size * (int)sizeof(ImDrawVert);
         const GLsizeiptr idx_buffer_size = (GLsizeiptr)cmd_list->IdxBuffer.Size * (int)sizeof(ImDrawIdx);
@@ -1557,17 +1553,17 @@ void ImGuiWrapper::render_draw_data(ImDrawData *draw_data)
 
         const int position_id = shader->get_attrib_location("Position");
         if (position_id != -1) {
-            glsafe(::glVertexAttribPointer(position_id, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, pos)));
+            glsafe(::glVertexAttribPointer(position_id, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (const void*)IM_OFFSETOF(ImDrawVert, pos)));
             glsafe(::glEnableVertexAttribArray(position_id));
         }
         const int uv_id = shader->get_attrib_location("UV");
         if (uv_id != -1) {
-            glsafe(::glVertexAttribPointer(uv_id, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, uv)));
+            glsafe(::glVertexAttribPointer(uv_id, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (const void*)IM_OFFSETOF(ImDrawVert, uv)));
             glsafe(::glEnableVertexAttribArray(uv_id));
         }
         const int color_id = shader->get_attrib_location("Color");
         if (color_id != -1) {
-            glsafe(::glVertexAttribPointer(color_id, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, col)));
+            glsafe(::glVertexAttribPointer(color_id, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (const void*)IM_OFFSETOF(ImDrawVert, col)));
             glsafe(::glEnableVertexAttribArray(color_id));
         }
 #else
@@ -1596,18 +1592,20 @@ void ImGuiWrapper::render_draw_data(ImDrawData *draw_data)
                 glsafe(::glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->GetTexID()));
                 glsafe(::glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx))));
 #else
-                const ImVec4 clip_rect = ImVec4(pcmd->ClipRect.x - pos.x, pcmd->ClipRect.y - pos.y, pcmd->ClipRect.z - pos.x, pcmd->ClipRect.w - pos.y);
-                if (clip_rect.x < fb_width && clip_rect.y < fb_height && clip_rect.z >= 0.0f && clip_rect.w >= 0.0f) {
-                    // Apply scissor/clipping rectangle
-                    glsafe(::glScissor((int)clip_rect.x, (int)(fb_height - clip_rect.w), (int)(clip_rect.z - clip_rect.x), (int)(clip_rect.w - clip_rect.y)));
+                // Project scissor/clipping rectangles into framebuffer space
+                const ImVec2 clip_min((pcmd->ClipRect.x - clip_off.x) * clip_scale.x, (pcmd->ClipRect.y - clip_off.y) * clip_scale.y);
+                const ImVec2 clip_max((pcmd->ClipRect.z - clip_off.x) * clip_scale.x, (pcmd->ClipRect.w - clip_off.y) * clip_scale.y);
+                if (clip_max.x <= clip_min.x || clip_max.y <= clip_min.y)
+                    continue;
 
-                    // Bind texture, Draw
-                    glsafe(::glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->GetTexID()));
-                    glsafe(::glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx))));
-                }
+                // Apply scissor/clipping rectangle (Y is inverted in OpenGL)
+                glsafe(::glScissor((int)clip_min.x, (int)(fb_height - clip_max.y), (int)(clip_max.x - clip_min.x), (int)(clip_max.y - clip_min.y)));
+
+                // Bind texture, Draw
+                glsafe(::glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->GetTexID()));
+                glsafe(::glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, idx_buffer + pcmd->IdxOffset));
 #endif // ENABLE_GL_IMGUI_SHADERS
             }
-            idx_buffer += pcmd->ElemCount;
         }
 
 #if ENABLE_GL_IMGUI_SHADERS
@@ -1639,11 +1637,14 @@ void ImGuiWrapper::render_draw_data(ImDrawData *draw_data)
     glsafe(::glPopMatrix());
 #endif // !ENABLE_GL_IMGUI_SHADERS
     glsafe(::glPopAttrib());
-    glsafe(::glPolygonMode(GL_FRONT, (GLenum)last_polygon_mode[0]); glPolygonMode(GL_BACK, (GLenum)last_polygon_mode[1]));
+    glsafe(::glPolygonMode(GL_FRONT, (GLenum)last_polygon_mode[0]);
+    glsafe(::glPolygonMode(GL_BACK,  (GLenum)last_polygon_mode[1])));
     glsafe(::glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]));
     glsafe(::glScissor(last_scissor_box[0], last_scissor_box[1], (GLsizei)last_scissor_box[2], (GLsizei)last_scissor_box[3]));
 
 #if ENABLE_GL_IMGUI_SHADERS
+    shader->stop_using();
+
     if (curr_shader != nullptr)
         curr_shader->start_using();
 #endif // ENABLE_GL_IMGUI_SHADERS

src/slic3r/GUI/MeshUtils.cpp

@@ -87,11 +87,7 @@ void MeshClipper::render_cut()
     if (curr_shader != nullptr)
         curr_shader->stop_using();
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader != nullptr) {
         shader->start_using();
 #if ENABLE_GL_SHADERS_ATTRIBUTES

src/slic3r/GUI/Selection.cpp

@@ -1275,11 +1275,7 @@ void Selection::render_center(bool gizmo_is_dragging)
         return;
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 
@@ -1324,11 +1320,7 @@ void Selection::render_sidebar_hints(const std::string& sidebar_field)
         return;
 
 #if ENABLE_LEGACY_OPENGL_REMOVAL
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader(boost::starts_with(sidebar_field, "layer") ? "flat_attr" : "gouraud_light_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader(boost::starts_with(sidebar_field, "layer") ? "flat" : "gouraud_light");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;
 
@@ -2020,11 +2012,7 @@ void Selection::render_bounding_box(const BoundingBoxf3 & box, float* color) con
 
     glsafe(::glLineWidth(2.0f * m_scale_factor));
 
-#if ENABLE_GL_SHADERS_ATTRIBUTES
-    GLShaderProgram* shader = wxGetApp().get_shader("flat_attr");
-#else
     GLShaderProgram* shader = wxGetApp().get_shader("flat");
-#endif // ENABLE_GL_SHADERS_ATTRIBUTES
     if (shader == nullptr)
         return;