diff --git a/resources/shaders/imgui.fs b/resources/shaders/imgui.fs new file mode 100644 index 000000000..4b0e27ce9 --- /dev/null +++ b/resources/shaders/imgui.fs @@ -0,0 +1,11 @@ +#version 110 + +uniform sampler2D Texture; + +varying vec2 Frag_UV; +varying vec4 Frag_Color; + +void main() +{ + gl_FragColor = Frag_Color * texture2D(Texture, Frag_UV.st); +} \ No newline at end of file diff --git a/resources/shaders/imgui.vs b/resources/shaders/imgui.vs new file mode 100644 index 000000000..100813e2b --- /dev/null +++ b/resources/shaders/imgui.vs @@ -0,0 +1,17 @@ +#version 110 + +uniform mat4 ProjMtx; + +attribute vec2 Position; +attribute vec2 UV; +attribute vec4 Color; + +varying vec2 Frag_UV; +varying vec4 Frag_Color; + +void main() +{ + Frag_UV = UV; + Frag_Color = Color; + gl_Position = ProjMtx * vec4(Position.xy, 0.0, 1.0); +} \ No newline at end of file diff --git a/src/libslic3r/Technologies.hpp b/src/libslic3r/Technologies.hpp index 85158ccb2..b90769541 100644 --- a/src/libslic3r/Technologies.hpp +++ b/src/libslic3r/Technologies.hpp @@ -70,6 +70,8 @@ #define ENABLE_LEGACY_OPENGL_REMOVAL (1 && ENABLE_2_5_0_ALPHA1) // Enable using vertex attributes and matrices in shaders #define ENABLE_GL_SHADERS_ATTRIBUTES (1 && ENABLE_LEGACY_OPENGL_REMOVAL) +// Enable rendering imgui using shaders +#define ENABLE_GL_IMGUI_SHADERS (1 && ENABLE_GL_SHADERS_ATTRIBUTES) // Shows an imgui dialog with GLModel statistics data #define ENABLE_GLMODEL_STATISTICS (0 && ENABLE_LEGACY_OPENGL_REMOVAL) // Enable show non-manifold edges diff --git a/src/slic3r/GUI/GLShader.cpp b/src/slic3r/GUI/GLShader.cpp index 7e5704e87..c82658e5c 100644 --- a/src/slic3r/GUI/GLShader.cpp +++ b/src/slic3r/GUI/GLShader.cpp @@ -122,8 +122,7 @@ bool GLShaderProgram::init_from_texts(const std::string& name, const ShaderSourc for (size_t i = 0; i < static_cast(EShaderType::Count); ++i) { const std::string& source = sources[i]; - if (!source.empty()) - { + if (!source.empty()) { EShaderType type = static_cast(i); auto [result, id] = create_shader(type); if (result) @@ -303,6 +302,19 @@ void GLShaderProgram::set_uniform(int id, const Matrix3d& value) const } #endif // ENABLE_GL_SHADERS_ATTRIBUTES +#if ENABLE_GL_IMGUI_SHADERS +void GLShaderProgram::set_uniform(int id, const Matrix4f& value) const +{ + if (id >= 0) + glsafe(::glUniformMatrix4fv(id, 1, GL_FALSE, static_cast(value.data()))); +} + +void GLShaderProgram::set_uniform(int id, const Matrix4d& value) const +{ + set_uniform(id, (Matrix4f)value.cast()); +} +#endif // ENABLE_GL_IMGUI_SHADERS + void GLShaderProgram::set_uniform(int id, const Vec3f& value) const { if (id >= 0) diff --git a/src/slic3r/GUI/GLShader.hpp b/src/slic3r/GUI/GLShader.hpp index a867a62bd..3b669fc77 100644 --- a/src/slic3r/GUI/GLShader.hpp +++ b/src/slic3r/GUI/GLShader.hpp @@ -64,6 +64,10 @@ public: #if ENABLE_GL_SHADERS_ATTRIBUTES void set_uniform(const char* name, const Matrix3d& value) const { set_uniform(get_uniform_location(name), value); } #endif // ENABLE_GL_SHADERS_ATTRIBUTES +#if ENABLE_GL_IMGUI_SHADERS + void set_uniform(const char* name, const Matrix4f& value) const { set_uniform(get_uniform_location(name), value); } + void set_uniform(const char* name, const Matrix4d& value) const { set_uniform(get_uniform_location(name), value); } +#endif // ENABLE_GL_IMGUI_SHADERS void set_uniform(const char* name, const Vec3f& value) const { set_uniform(get_uniform_location(name), value); } void set_uniform(const char* name, const Vec3d& value) const { set_uniform(get_uniform_location(name), value); } void set_uniform(const char* name, const ColorRGB& value) const { set_uniform(get_uniform_location(name), value); } @@ -86,6 +90,10 @@ public: #if ENABLE_GL_SHADERS_ATTRIBUTES void set_uniform(int id, const Matrix3d& value) const; #endif // ENABLE_GL_SHADERS_ATTRIBUTES +#if ENABLE_GL_IMGUI_SHADERS + void set_uniform(int id, const Matrix4f& value) const; + void set_uniform(int id, const Matrix4d& value) const; +#endif // ENABLE_GL_IMGUI_SHADERS void set_uniform(int id, const Vec3f& value) const; void set_uniform(int id, const Vec3d& value) const; void set_uniform(int id, const ColorRGB& value) const; diff --git a/src/slic3r/GUI/GLShadersManager.cpp b/src/slic3r/GUI/GLShadersManager.cpp index 75b6824a7..9f0b03ea0 100644 --- a/src/slic3r/GUI/GLShadersManager.cpp +++ b/src/slic3r/GUI/GLShadersManager.cpp @@ -35,6 +35,8 @@ std::pair GLShadersManager::init() #if ENABLE_LEGACY_OPENGL_REMOVAL #if ENABLE_GL_SHADERS_ATTRIBUTES + // imgui shader + valid &= append_shader("imgui", { "imgui.vs", "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" }); // basic shader for textures, used to render textures diff --git a/src/slic3r/GUI/ImGuiWrapper.cpp b/src/slic3r/GUI/ImGuiWrapper.cpp index 4b75befb6..819d6141e 100644 --- a/src/slic3r/GUI/ImGuiWrapper.cpp +++ b/src/slic3r/GUI/ImGuiWrapper.cpp @@ -26,13 +26,18 @@ #include "libslic3r/libslic3r.h" #include "libslic3r/Utils.hpp" #include "libslic3r/Color.hpp" + #include "3DScene.hpp" #include "GUI.hpp" #include "I18N.hpp" #include "Search.hpp" #include "BitmapCache.hpp" +#if ENABLE_GL_IMGUI_SHADERS +#include "GUI_App.hpp" +#endif // ENABLE_GL_IMGUI_SHADERS #include "../Utils/MacDarkMode.hpp" + #include "nanosvg/nanosvg.h" #include "nanosvg/nanosvgrast.h" @@ -1442,12 +1447,30 @@ void ImGuiWrapper::init_style() void ImGuiWrapper::render_draw_data(ImDrawData *draw_data) { + if (draw_data == nullptr || draw_data->CmdListsCount == 0) + return; + +#if ENABLE_GL_IMGUI_SHADERS + GLShaderProgram* shader = wxGetApp().get_shader("imgui"); + if (shader == nullptr) + return; +#endif // ENABLE_GL_IMGUI_SHADERS + // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates) ImGuiIO& io = ImGui::GetIO(); const int fb_width = (int)(draw_data->DisplaySize.x * io.DisplayFramebufferScale.x); const int fb_height = (int)(draw_data->DisplaySize.y * io.DisplayFramebufferScale.y); if (fb_width == 0 || fb_height == 0) return; + +#if ENABLE_GL_IMGUI_SHADERS + GLShaderProgram* curr_shader = wxGetApp().get_current_shader(); + if (curr_shader != nullptr) + curr_shader->stop_using(); + + shader->start_using(); +#endif // ENABLE_GL_IMGUI_SHADERS + draw_data->ScaleClipRects(io.DisplayFramebufferScale); // We are using the OpenGL fixed pipeline to make the example code simpler to read! @@ -1464,17 +1487,37 @@ void ImGuiWrapper::render_draw_data(ImDrawData *draw_data) glsafe(::glDisable(GL_LIGHTING)); glsafe(::glDisable(GL_COLOR_MATERIAL)); glsafe(::glEnable(GL_SCISSOR_TEST)); +#if !ENABLE_GL_IMGUI_SHADERS glsafe(::glEnableClientState(GL_VERTEX_ARRAY)); glsafe(::glEnableClientState(GL_TEXTURE_COORD_ARRAY)); glsafe(::glEnableClientState(GL_COLOR_ARRAY)); +#endif // !ENABLE_GL_IMGUI_SHADERS glsafe(::glEnable(GL_TEXTURE_2D)); glsafe(::glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)); glsafe(::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE)); GLint texture_env_mode = GL_MODULATE; glsafe(::glGetTexEnviv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, &texture_env_mode)); glsafe(::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE)); - //glUseProgram(0); // You may want this if using this code in an OpenGL 3+ context where shaders may be bound +#if ENABLE_GL_IMGUI_SHADERS + // Setup viewport, orthographic projection matrix + // Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps. + glsafe(::glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height)); + const float L = draw_data->DisplayPos.x; + const float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x; + const float T = draw_data->DisplayPos.y; + const float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y; + + Matrix4f ortho_projection; + ortho_projection << + 2.0f / (R - L), 0.0f, 0.0f, (R + L) / (L - R), + 0.0f, 2.0f / (T - B), 0.0f, (T + B) / (B - T), + 0.0f, 0.0f, -1.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 1.0f; + + shader->set_uniform("Texture", 0); + shader->set_uniform("ProjMtx", ortho_projection); +#else // Setup viewport, orthographic projection matrix // Our visible imgui space lies from draw_data->DisplayPps (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayMin is typically (0,0) for single viewport apps. glsafe(::glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height)); @@ -1485,16 +1528,57 @@ void ImGuiWrapper::render_draw_data(ImDrawData *draw_data) glsafe(::glMatrixMode(GL_MODELVIEW)); glsafe(::glPushMatrix()); 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_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 - ImVec2 pos = draw_data->DisplayPos; 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; +#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); + + GLuint vbo_id; + glsafe(::glGenBuffers(1, &vbo_id)); + glsafe(::glBindBuffer(GL_ARRAY_BUFFER, vbo_id)); + glsafe(::glBufferData(GL_ARRAY_BUFFER, vtx_buffer_size, nullptr, GL_STREAM_DRAW)); + glsafe(::glBufferSubData(GL_ARRAY_BUFFER, 0, vtx_buffer_size, (const GLvoid*)cmd_list->VtxBuffer.Data)); + + GLuint ibo_id; + glsafe(::glGenBuffers(1, &ibo_id)); + glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ibo_id)); + glsafe(::glBufferData(GL_ELEMENT_ARRAY_BUFFER, idx_buffer_size, nullptr, GL_STREAM_DRAW)); + glsafe(::glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, idx_buffer_size, (const GLvoid*)cmd_list->IdxBuffer.Data)); + + const int position_id = shader->get_attrib_location("Position"); + if (position_id != -1) { + glVertexAttribPointer(position_id, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, pos)); + glEnableVertexAttribArray(position_id); + } + const int uv_id = shader->get_attrib_location("UV"); + if (uv_id != -1) { + glVertexAttribPointer(uv_id, 2, GL_FLOAT, GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, uv)); + glEnableVertexAttribArray(uv_id); + } + const int color_id = shader->get_attrib_location("Color"); + if (color_id != -1) { + glVertexAttribPointer(color_id, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, col)); + glEnableVertexAttribArray(color_id); + } +#else glsafe(::glVertexPointer(2, GL_FLOAT, sizeof(ImDrawVert), (const GLvoid*)((const char*)vtx_buffer + IM_OFFSETOF(ImDrawVert, pos)))); glsafe(::glTexCoordPointer(2, GL_FLOAT, sizeof(ImDrawVert), (const GLvoid*)((const char*)vtx_buffer + IM_OFFSETOF(ImDrawVert, uv)))); glsafe(::glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(ImDrawVert), (const GLvoid*)((const char*)vtx_buffer + IM_OFFSETOF(ImDrawVert, col)))); +#endif // ENABLE_GL_IMGUI_SHADERS for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; ++cmd_i) { const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i]; @@ -1502,34 +1586,73 @@ void ImGuiWrapper::render_draw_data(ImDrawData *draw_data) // User callback (registered via ImDrawList::AddCallback) pcmd->UserCallback(cmd_list, pcmd); else { - 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 ENABLE_GL_IMGUI_SHADERS + // 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; + + // Apply scissor/clipping rectangle (Y is inverted in OpenGL) + 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, (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))); // Bind texture, Draw - glsafe(::glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->TextureId)); - glsafe(::glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, idx_buffer)); + 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)))); } +#endif // ENABLE_GL_IMGUI_SHADERS } idx_buffer += pcmd->ElemCount; } + +#if ENABLE_GL_IMGUI_SHADERS + if (position_id != -1) + glDisableVertexAttribArray(position_id); + if (uv_id != -1) + glDisableVertexAttribArray(uv_id); + if (color_id != -1) + glDisableVertexAttribArray(color_id); + + glsafe(::glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)); + glsafe(::glBindBuffer(GL_ARRAY_BUFFER, 0)); + + glsafe(::glDeleteBuffers(1, &ibo_id)); + glsafe(::glDeleteBuffers(1, &vbo_id)); +#endif // ENABLE_GL_IMGUI_SHADERS } // Restore modified state glsafe(::glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, texture_env_mode)); +#if !ENABLE_GL_IMGUI_SHADERS glsafe(::glDisableClientState(GL_COLOR_ARRAY)); glsafe(::glDisableClientState(GL_TEXTURE_COORD_ARRAY)); glsafe(::glDisableClientState(GL_VERTEX_ARRAY)); +#endif // !ENABLE_GL_IMGUI_SHADERS glsafe(::glBindTexture(GL_TEXTURE_2D, (GLuint)last_texture)); +#if !ENABLE_GL_IMGUI_SHADERS glsafe(::glMatrixMode(GL_MODELVIEW)); glsafe(::glPopMatrix()); glsafe(::glMatrixMode(GL_PROJECTION)); 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(::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 + if (curr_shader != nullptr) + curr_shader->start_using(); +#endif // ENABLE_GL_IMGUI_SHADERS } bool ImGuiWrapper::display_initialized() const