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[Feat] (RenderState): implement glMinSampleShading and the GL_SAMPLE_SHADING enable on both backends

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swung0x48
2026-08-27 03:35:55 -04:00
parent 07a0408a28
commit acf86d1fb6
16 changed files with 533 additions and 2 deletions
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MobileGL/MG_Impl/GLImpl/Exporting/Definitions.cpp
+1 -1
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@@ -411,7 +411,7 @@ DECLARE_GL_FUNCTION_HEAD(void, ReadnPixels, GLint x, GLint y, GLsizei width, GLs
DECLARE_GL_FUNCTION_STUB_HEAD(void, GetnUniformfv, GLuint program, GLint location, GLsizei bufSize, GLfloat* params) DECLARE_GL_FUNCTION_STUB_END_NO_RETURN(void, GetnUniformfv, program, location, bufSize, params)
DECLARE_GL_FUNCTION_STUB_HEAD(void, GetnUniformiv, GLuint program, GLint location, GLsizei bufSize, GLint* params) DECLARE_GL_FUNCTION_STUB_END_NO_RETURN(void, GetnUniformiv, program, location, bufSize, params)
DECLARE_GL_FUNCTION_STUB_HEAD(void, GetnUniformuiv, GLuint program, GLint location, GLsizei bufSize, GLuint* params) DECLARE_GL_FUNCTION_STUB_END_NO_RETURN(void, GetnUniformuiv, program, location, bufSize, params)
DECLARE_GL_FUNCTION_STUB_HEAD(void, MinSampleShading, GLfloat value) DECLARE_GL_FUNCTION_STUB_END_NO_RETURN(void, MinSampleShading, value)
DECLARE_GL_FUNCTION_HEAD(void, MinSampleShading, GLfloat value) DECLARE_GL_FUNCTION_END_NO_RETURN(void, MinSampleShading, value)
DECLARE_GL_FUNCTION_HEAD(void, PatchParameteri, GLenum pname, GLint value) DECLARE_GL_FUNCTION_END_NO_RETURN(void, PatchParameteri, pname, value)
DECLARE_GL_FUNCTION_HEAD(void, TexParameterIiv, GLenum target, GLenum pname, const GLint* params) DECLARE_GL_FUNCTION_END_NO_RETURN(void, TexParameterIiv, target, pname, params)
DECLARE_GL_FUNCTION_HEAD(void, TexParameterIuiv, GLenum target, GLenum pname, const GLuint* params) DECLARE_GL_FUNCTION_END_NO_RETURN(void, TexParameterIuiv, target, pname, params)
MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
+16 -1
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@@ -682,7 +682,10 @@ namespace MobileGL::MG_Impl::GLImpl {
return;
case GL_MIN_FRAGMENT_INTERPOLATION_OFFSET:
case GL_MAX_FRAGMENT_INTERPOLATION_OFFSET:
case GL_FRAGMENT_INTERPOLATION_OFFSET_BITS: {
case GL_FRAGMENT_INTERPOLATION_OFFSET_BITS:
// Same reason as the three above: the integer fallback would round the fraction to 0
// or 1 first, so a 0.25 sample-shading rate would answer GL_FALSE.
case GL_MIN_SAMPLE_SHADING_VALUE: {
GLfloat value = 0.0f;
GetFloatv(pname, &value);
*params = value != 0.0f ? GL_TRUE : GL_FALSE;
@@ -848,6 +851,11 @@ namespace MobileGL::MG_Impl::GLImpl {
case GL_SAMPLE_COVERAGE_VALUE:
params[0] = MG_State::pGLContext->GetSampleCoverageValue();
return;
case GL_MIN_SAMPLE_SHADING_VALUE:
// Float state, so it has to be answered here rather than through the integer
// fallback: glMinSampleShading(0.5) must read back as 0.5 and not as 0.
params[0] = MG_State::pGLContext->GetMinSampleShadingValue();
return;
case GL_POINT_FADE_THRESHOLD_SIZE:
// Float state: read it directly so the fractional part is not lost to the integer path.
params[0] = MG_State::pGLContext->GetPointFadeThresholdSize();
@@ -1941,6 +1949,13 @@ namespace MobileGL::MG_Impl::GLImpl {
case GL_SAMPLE_MASK:
*params = MG_State::pGLContext->IsCapabilityEnabled(CapabilityInput::SampleMask) ? GL_TRUE : GL_FALSE;
return;
case GL_SAMPLE_SHADING:
*params = MG_State::pGLContext->IsCapabilityEnabled(CapabilityInput::SampleShading) ? GL_TRUE : GL_FALSE;
return;
case GL_MIN_SAMPLE_SHADING_VALUE:
// GL 4.6 core 22.2: a floating-point value queried as an integer rounds to nearest.
*params = static_cast<GLint>(std::lround(MG_State::pGLContext->GetMinSampleShadingValue()));
return;
case GL_SAMPLE_MASK_VALUE:
*params = static_cast<GLint>(MG_State::pGLContext->GetSampleMaskValue());
return;
MobileGL/MG_Impl/GLImpl/RenderState/GL_RenderState.cpp
+12
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@@ -328,6 +328,14 @@ namespace MobileGL::MG_Impl::GLImpl {
MG_State::pGLContext->SetSampleCoverage(std::clamp(static_cast<Float>(value), 0.0f, 1.0f), invert == GL_TRUE);
}
// ARB_sample_shading / GL 4.6 core 14.3.1: "value is clamped to [0, 1] when specified", so
// there is no error to raise - a caller that asks for 2.0 gets 1.0 and GL_MIN_SAMPLE_SHADING_-
// VALUE reads back 1.0. Was a logging no-op while ARB_sample_shading was advertised, which
// let an application enable GL_SAMPLE_SHADING and then quietly get the driver's default rate.
void MinSampleShading_State(GLfloat value) {
MG_State::pGLContext->SetMinSampleShadingValue(std::clamp(static_cast<Float>(value), 0.0f, 1.0f));
}
void PolygonOffset_State(GLfloat factor, GLfloat units) {
MG_State::pGLContext->SetPolygonOffset(static_cast<Float>(factor), static_cast<Float>(units));
}
@@ -1013,6 +1021,10 @@ namespace MobileGL::MG_Impl::GLImpl {
SampleCoverage_State(value, invert);
}
void MinSampleShading(GLfloat value) {
MinSampleShading_State(value);
}
void PolygonOffset(GLfloat factor, GLfloat units) {
PolygonOffset_State(factor, units);
}
MobileGL/MG_Impl/GLImpl/RenderState/GL_RenderState.h
+1
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@@ -38,6 +38,7 @@ namespace MobileGL::MG_Impl::GLImpl {
void StencilFunc(GLenum func, GLint ref, GLuint mask);
void Scissor(GLint x, GLint y, GLsizei width, GLsizei height);
void SampleCoverage(GLfloat value, GLboolean invert);
void MinSampleShading(GLfloat value);
void PolygonOffset(GLfloat factor, GLfloat units);
void PolygonMode(GLenum face, GLenum mode);
void PointSize(GLfloat size);