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[Feat] (MG_Backend, MG_Impl): expose experimental GL 4.6 CTS limits

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swung0x48
2026-07-30 23:00:13 -04:00
parent 77bd03d962
commit 7e8c32a063
10 changed files with 320 additions and 8 deletions
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MobileGL/MG_Test/BackendLoader/BackendLoaderTest.cpp
+75
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@@ -34,6 +34,11 @@ namespace {
GLint maxFragmentImageUniforms = 4;
GLint maxComputeImageUniforms = 5;
bool maxGeometryImageUniformsQueried = false;
GLfloat minFragmentInterpolationOffset = -0.75f;
GLfloat maxFragmentInterpolationOffset = 0.625f;
GLint fragmentInterpolationOffsetBits = 6;
bool fragmentInterpolationLimitsQueried = false;
bool fragmentInterpolationQueryRaisesError = false;
// Emulates ANGLE-on-Vulkan: the draw reads the indirect command's
// baseInstance word and exposes it through gl_InstanceID.
bool drawLeaksBaseInstanceWord = false;
@@ -108,6 +113,14 @@ namespace {
case GL_MAX_COMPUTE_IMAGE_UNIFORMS:
*data = g_fake.maxComputeImageUniforms;
break;
case GL_FRAGMENT_INTERPOLATION_OFFSET_BITS:
g_fake.fragmentInterpolationLimitsQueried = true;
if (g_fake.fragmentInterpolationQueryRaisesError) {
g_fake.pendingError = GL_INVALID_ENUM;
} else {
*data = g_fake.fragmentInterpolationOffsetBits;
}
break;
// FillInGLESCapabilities reads the context version before running the
// baseInstance probe, which requires ES >= 3.1.
case GL_MAJOR_VERSION:
@@ -155,6 +168,22 @@ namespace {
g_fake.maxTextureMaxAnisotropyQueried = true;
data[0] = g_fake.maxTextureMaxAnisotropy;
break;
case GL_MIN_FRAGMENT_INTERPOLATION_OFFSET:
g_fake.fragmentInterpolationLimitsQueried = true;
if (g_fake.fragmentInterpolationQueryRaisesError) {
g_fake.pendingError = GL_INVALID_ENUM;
} else {
data[0] = g_fake.minFragmentInterpolationOffset;
}
break;
case GL_MAX_FRAGMENT_INTERPOLATION_OFFSET:
g_fake.fragmentInterpolationLimitsQueried = true;
if (g_fake.fragmentInterpolationQueryRaisesError) {
g_fake.pendingError = GL_INVALID_ENUM;
} else {
data[0] = g_fake.maxFragmentInterpolationOffset;
}
break;
// Two-component range queries.
case GL_ALIASED_LINE_WIDTH_RANGE:
case GL_SMOOTH_LINE_WIDTH_RANGE:
@@ -462,6 +491,52 @@ TEST(ImageUniformCapabilities, QueriesRealPerStageLimitsAndConservativelyGatesGe
EXPECT_TRUE(g_fake.maxGeometryImageUniformsQueried);
}
TEST(FragmentInterpolationCapabilities, QueriesOnlyWhenSupportedAndPreservesDriverLimits) {
const auto funcs = MakeFakeGLESFunctions();
ResetFakeDriver();
g_fake.maxVertexSsboBlocks = 0;
MobileGL::MG_External::GLESCapabilities unsupportedCaps;
ASSERT_TRUE(MobileGL::MG_Util::BackendLoader::FillInGLESCapabilities(unsupportedCaps, funcs));
EXPECT_FALSE(unsupportedCaps.SupportsShaderMultisampleInterpolation);
EXPECT_FALSE(g_fake.fragmentInterpolationLimitsQueried);
EXPECT_FLOAT_EQ(unsupportedCaps.MinFragmentInterpolationOffset, -0.5f);
EXPECT_FLOAT_EQ(unsupportedCaps.MaxFragmentInterpolationOffset, 0.4375f);
EXPECT_EQ(unsupportedCaps.FragmentInterpolationOffsetBits, 4);
ResetFakeDriver();
g_fake.maxVertexSsboBlocks = 0;
g_fake.extensions.emplace_back("GL_OES_shader_multisample_interpolation");
// A stale error from an earlier capability probe must not make the optional
// interpolation query look like it failed.
g_fake.pendingError = GL_INVALID_OPERATION;
MobileGL::MG_External::GLESCapabilities supportedCaps;
ASSERT_TRUE(MobileGL::MG_Util::BackendLoader::FillInGLESCapabilities(supportedCaps, funcs));
EXPECT_TRUE(supportedCaps.SupportsShaderMultisampleInterpolation);
EXPECT_TRUE(g_fake.fragmentInterpolationLimitsQueried);
EXPECT_FLOAT_EQ(supportedCaps.MinFragmentInterpolationOffset, g_fake.minFragmentInterpolationOffset);
EXPECT_FLOAT_EQ(supportedCaps.MaxFragmentInterpolationOffset, g_fake.maxFragmentInterpolationOffset);
EXPECT_EQ(supportedCaps.FragmentInterpolationOffsetBits, g_fake.fragmentInterpolationOffsetBits);
EXPECT_EQ(funcs.glGetError(), GL_NO_ERROR);
}
TEST(FragmentInterpolationCapabilities, QueryErrorIsDrainedAndFallsBackToCoreMinimums) {
ResetFakeDriver();
g_fake.maxVertexSsboBlocks = 0;
g_fake.extensions.emplace_back("GL_OES_shader_multisample_interpolation");
g_fake.fragmentInterpolationQueryRaisesError = true;
const auto funcs = MakeFakeGLESFunctions();
MobileGL::MG_External::GLESCapabilities caps;
ASSERT_TRUE(MobileGL::MG_Util::BackendLoader::FillInGLESCapabilities(caps, funcs));
EXPECT_TRUE(g_fake.fragmentInterpolationLimitsQueried);
EXPECT_FLOAT_EQ(caps.MinFragmentInterpolationOffset, -0.5f);
EXPECT_FLOAT_EQ(caps.MaxFragmentInterpolationOffset, 0.4375f);
EXPECT_EQ(caps.FragmentInterpolationOffsetBits, 4);
EXPECT_EQ(funcs.glGetError(), GL_NO_ERROR);
}
// The extension string is what apps gate on (LWJGL builds GLCapabilities from it), so advertising
// it on a driver that cannot filter anisotropically would leave them silently on trilinear.
TEST(TextureAnisotropyCapabilities, ExtensionIsAdvertisedOnlyWhenTheHostDriverSupportsIt) {