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video_core: Perform quaternion correction and interpolation in fragment shader using barycentric extension. (#7126)

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Steveice10 2023-11-09 15:23:56 -08:00 • committed by GitHub
parent fcc0fd671a
commit 84f9e9a10f
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9 changed files with 100 additions and 7 deletions
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39
src/video_core/shader/generator/glsl_fs_shader_gen.cpp
View file

@ -567,6 +567,17 @@ void FragmentModule::WriteLighting() {
}
}
// If the barycentric extension is enabled, perform quaternion correction here.
if (use_fragment_shader_barycentric) {
out += "vec4 normquat_0 = normquats[0];\n"
"vec4 normquat_1 = mix(normquats[1], -normquats[1], "
"bvec4(AreQuaternionsOpposite(normquats[0], normquats[1])));\n"
"vec4 normquat_2 = mix(normquats[2], -normquats[2], "
"bvec4(AreQuaternionsOpposite(normquats[0], normquats[2])));\n"
"vec4 normquat = gl_BaryCoord.x * normquat_0 + gl_BaryCoord.y * normquat_1 + "
"gl_BaryCoord.z * normquat_2;\n";
}
// Rotate the surface-local normal by the interpolated normal quaternion to convert it to
// eyespace.
out += "vec4 normalized_normquat = normalize(normquat);\n"
@ -1231,6 +1242,20 @@ void FragmentModule::DefineExtensions() {
use_fragment_shader_interlock = false;
}
}
if (config.lighting.enable) {
use_fragment_shader_barycentric = true;
if (profile.has_fragment_shader_barycentric) {
out += "#extension GL_EXT_fragment_shader_barycentric : enable\n";
out += "#define pervertex pervertexEXT\n";
out += "#define gl_BaryCoord gl_BaryCoordEXT\n";
} else if (profile.has_gl_nv_fragment_shader_barycentric) {
out += "#extension GL_NV_fragment_shader_barycentric : enable\n";
out += "#define pervertex pervertexNV\n";
out += "#define gl_BaryCoord gl_BaryCoordNV\n";
} else {
use_fragment_shader_barycentric = false;
}
}
if (config.EmulateBlend()) {
if (profile.has_gl_ext_framebuffer_fetch) {
out += "#extension GL_EXT_shader_framebuffer_fetch : enable\n";
@ -1263,7 +1288,11 @@ void FragmentModule::DefineInterface() {
define_input("vec2 texcoord1", Semantic::Texcoord1);
define_input("vec2 texcoord2", Semantic::Texcoord2);
define_input("float texcoord0_w", Semantic::Texcoord0_W);
define_input("vec4 normquat", Semantic::Normquat);
if (use_fragment_shader_barycentric) {
define_input("pervertex vec4 normquats[]", Semantic::Normquat);
} else {
define_input("vec4 normquat", Semantic::Normquat);
}
define_input("vec3 view", Semantic::View);
// Output attributes
@ -1360,6 +1389,14 @@ float LookupLightingLUTSigned(int lut_index, float pos) {
return LookupLightingLUT(lut_index, index, delta);
}
)";
if (use_fragment_shader_barycentric) {
out += R"(
bool AreQuaternionsOpposite(vec4 qa, vec4 qb) {
return (dot(qa, qb) < 0.0);
}
)";
}
}
void FragmentModule::DefineShadowHelpers() {

1
src/video_core/shader/generator/glsl_fs_shader_gen.h
View file

@ -87,6 +87,7 @@ private:
std::string out;
bool use_blend_fallback{};
bool use_fragment_shader_interlock{};
bool use_fragment_shader_barycentric{};
};
/**

2
src/video_core/shader/generator/profile.h
View file

@ -12,6 +12,7 @@ struct Profile {
bool has_geometry_shader{};
bool has_custom_border_color{};
bool has_fragment_shader_interlock{};
bool has_fragment_shader_barycentric{};
bool has_blend_minmax_factor{};
bool has_minus_one_to_one_range{};
bool has_logic_op{};
@ -19,6 +20,7 @@ struct Profile {
bool has_gl_arm_framebuffer_fetch{};
bool has_gl_nv_fragment_shader_interlock{};
bool has_gl_intel_fragment_shader_interlock{};
bool has_gl_nv_fragment_shader_barycentric{};
bool is_vulkan{};
};