3DPrinting/PrusaSlicer-NonPlainar
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OSX specific: Fixed darker colors of objects inside multi-material gizmo on macOS running on Arm64 CPU.

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For Apple's on Arm CPU computed triangle normals inside fragment shader using dFdx and dFdy has the opposite direction. Because of this, objects had darker colors inside the multi-material gizmo.
Based on https://stackoverflow.com/a/66206648, the similar behavior was also spotted on some other devices with Arm CPU.
This commit is contained in:
Lukáš Hejl 2021-08-02 14:03:17 +02:00
parent ab9dfb7932
commit bad51cdb52
4 changed files with 61 additions and 4 deletions
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3
resources/shaders/gouraud.fs
View File

@ -64,6 +64,9 @@ void main()
float world_normal_z_fs = world_normal_z;
if (compute_triangle_normals_in_fs) {
vec3 triangle_normal = normalize(cross(dFdx(model_pos.xyz), dFdy(model_pos.xyz)));
#ifdef FLIP_TRIANGLE_NORMALS
triangle_normal = -triangle_normal;
#endif
// First transform the normal into camera space and normalize the result.
eye_normal_fs = normalize(gl_NormalMatrix * triangle_normal);

41
src/libslic3r/Platform.cpp
View File

@ -3,6 +3,12 @@
#include <boost/log/trivial.hpp>
#include <boost/filesystem/operations.hpp>
#if defined(__APPLE__)
#include <sys/types.h>
#include <sys/sysctl.h>
#include <mach/machine.h>
#endif
namespace Slic3r {
static auto s_platform = Platform::Uninitialized;
@ -16,8 +22,39 @@ void detect_platform()
s_platform_flavor = PlatformFlavor::Generic;
#elif defined(__APPLE__)
BOOST_LOG_TRIVIAL(info) << "Platform: OSX";
s_platform = Platform::OSX;
s_platform_flavor = PlatformFlavor::Generic;
s_platform = Platform::OSX;
s_platform_flavor = PlatformFlavor::GenericOSX;
{
cpu_type_t type = 0;
size_t size = sizeof(type);
if (sysctlbyname("hw.cputype", &type, &size, NULL, 0) == 0) {
type &= ~CPU_ARCH_MASK;
if (type == CPU_TYPE_X86) {
int proc_translated = 0;
size = sizeof(proc_translated);
// Detect if native CPU is really X86 or PrusaSlicer runs through Rosetta.
if (sysctlbyname("sysctl.proc_translated", &proc_translated, &size, NULL, 0) == -1) {
if (errno == ENOENT) {
// Native CPU is X86, and property sysctl.proc_translated doesn't exist.
s_platform_flavor = PlatformFlavor::OSXOnX86;
BOOST_LOG_TRIVIAL(info) << "Platform flavor: OSXOnX86";
}
} else if (proc_translated == 1) {
// Native CPU is ARM and PrusaSlicer runs through Rosetta.
s_platform_flavor = PlatformFlavor::OSXOnArm;
BOOST_LOG_TRIVIAL(info) << "Platform flavor: OSXOnArm";
} else {
// Native CPU is X86.
s_platform_flavor = PlatformFlavor::OSXOnX86;
BOOST_LOG_TRIVIAL(info) << "Platform flavor: OSXOnX86";
}
} else if (type == CPU_TYPE_ARM) {
// Native CPU is ARM
s_platform_flavor = PlatformFlavor::OSXOnArm;
BOOST_LOG_TRIVIAL(info) << "Platform flavor: OSXOnArm";
}
}
}
#elif defined(__linux__)
BOOST_LOG_TRIVIAL(info) << "Platform: Linux";
s_platform = Platform::Linux;

6
src/libslic3r/Platform.hpp
View File

@ -28,6 +28,12 @@ enum class PlatformFlavor
WSL2,
// For Platform::BSDUnix
OpenBSD,
// For Platform::OSX
GenericOSX,
// For Apple's on Intel X86 CPU
OSXOnX86,
// For Apple's on Arm CPU
OSXOnArm,
};
// To be called on program start-up.

15
src/slic3r/GUI/GLShadersManager.cpp
View File

@ -1,4 +1,5 @@
#include "libslic3r/libslic3r.h"
#include "libslic3r/Platform.hpp"
#include "GLShadersManager.hpp"
#include "3DScene.hpp"
#include "GUI_App.hpp"
@ -43,9 +44,19 @@ std::pair<bool, std::string> GLShadersManager::init()
// used to render extrusion and travel paths as lines in gcode preview
valid &= append_shader("toolpaths_lines", { "toolpaths_lines.vs", "toolpaths_lines.fs" });
// used to render objects in 3d editor
valid &= append_shader("gouraud", { "gouraud.vs", "gouraud.fs" }
// For Apple's on Arm CPU computed triangle normals inside fragment shader using dFdx and dFdy has the opposite direction.
// Because of this, objects had darker colors inside the multi-material gizmo.
// Based on https://stackoverflow.com/a/66206648, the similar behavior was also spotted on some other devices with Arm CPU.
if (platform_flavor() == PlatformFlavor::OSXOnArm)
valid &= append_shader("gouraud", { "gouraud.vs", "gouraud.fs" }, { "FLIP_TRIANGLE_NORMALS"sv
#if ENABLE_ENVIRONMENT_MAP
, { "ENABLE_ENVIRONMENT_MAP"sv }
, "ENABLE_ENVIRONMENT_MAP"sv
#endif
});
else
valid &= append_shader("gouraud", { "gouraud.vs", "gouraud.fs" }
#if ENABLE_ENVIRONMENT_MAP
, { "ENABLE_ENVIRONMENT_MAP"sv }
#endif
);
// used to render variable layers heights in 3d editor