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[Fix] (MG_Impl, DirectGLES): correct ARB_clear_texture error codes, reject cube maps in CopyTextureSubImage2D, advertise the extension on Espryt, and pin the error contracts with tests

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swung0x48
2026-07-20 02:36:25 -04:00
parent f0cc07c937
commit 293f64b3c2
3 changed files with 73 additions and 4 deletions
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MobileGL/MG_Test/Texture/TextureTest.cpp
+43
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@@ -318,6 +318,49 @@ TEST_F(TextureTest, CopyTextureSubImage2DUsesNamedObjectAndRestoresBinding) {
EXPECT_EQ(MG_Impl::GLImpl::GetError(), GL_NO_ERROR);
}
TEST_F(TextureTest, CopyTextureSubImage2DRejectsCubeMapTargets) {
const ScopedTextureBackendFunctionsOverride backendGuard;
MG_Backend::gBackendFunctionsTable.GL.CopyTexSubImage2D = RecordCopyTexSubImage2D;
g_copyTexSubImage2DCall = {};
GLuint cubeTexture = 0;
MG_Impl::GLImpl::CreateTextures(GL_TEXTURE_CUBE_MAP, 1, &cubeTexture);
MG_Impl::GLImpl::CopyTextureSubImage2D(cubeTexture, 0, 0, 0, 0, 0, 1, 1);
// GL 4.6 sec. 8.8: the 2D form only accepts 2D/1D-array/rectangle effective targets.
EXPECT_FALSE(g_copyTexSubImage2DCall.Called);
EXPECT_EQ(MG_Impl::GLImpl::GetError(), static_cast<GLenum>(GL_INVALID_OPERATION));
}
TEST_F(TextureTest, ClearTexImageErrorContracts) {
GLuint texture = 0;
MG_Impl::GLImpl::GenTextures(1, &texture);
MG_Impl::GLImpl::BindTexture(GL_TEXTURE_2D, texture);
MG_Impl::GLImpl::TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 2, 2, 0,
GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
// Zero texture name is INVALID_OPERATION (ARB_clear_texture).
MG_Impl::GLImpl::ClearTexImage(0, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
EXPECT_EQ(MG_Impl::GLImpl::GetError(), static_cast<GLenum>(GL_INVALID_OPERATION));
// A negative level is INVALID_VALUE...
MG_Impl::GLImpl::ClearTexImage(texture, -1, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
EXPECT_EQ(MG_Impl::GLImpl::GetError(), static_cast<GLenum>(GL_INVALID_VALUE));
// ...but clearing a level that was never defined is INVALID_OPERATION.
MG_Impl::GLImpl::ClearTexImage(texture, 5, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
EXPECT_EQ(MG_Impl::GLImpl::GetError(), static_cast<GLenum>(GL_INVALID_OPERATION));
// A clear region outside the level is INVALID_VALUE.
MG_Impl::GLImpl::ClearTexSubImage(texture, 0, 1, 1, 0, 4, 4, 1,
GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
EXPECT_EQ(MG_Impl::GLImpl::GetError(), static_cast<GLenum>(GL_INVALID_VALUE));
// An invalid pixel-transfer format is INVALID_ENUM from the shared validators.
MG_Impl::GLImpl::ClearTexImage(texture, 0, GL_NONE, GL_UNSIGNED_BYTE, nullptr);
EXPECT_EQ(MG_Impl::GLImpl::GetError(), static_cast<GLenum>(GL_INVALID_ENUM));
}
// GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT is float state that must answer every numeric query: GetFloatv
// is authoritative and GetIntegerv would otherwise fall through to its INVALID_ENUM default.
TEST_F(TextureTest, MaxTextureMaxAnisotropyIsAnsweredFromTheBackendLimit) {