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[Fix, Test] (BackendLoader, DirectGLES, DirectVulkan, GLImpl): answer the layer and viewport-index provoking-vertex conventions from the backend

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swung0x48
2026-08-20 15:40:25 -04:00
parent 51883cf1a3
commit d24d5b5ccd
8 changed files with 205 additions and 6 deletions
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MobileGL/MG_Test/SanityTest.cpp
+27
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@@ -665,6 +665,33 @@ TEST(DirectVulkanSanity, GatesClipDistancesOnTheShaderClipDistanceFeature) {
EXPECT_EQ(backend.GetDynamicParameters().MaxClipDistances, 8);
}
// GL_LAYER_PROVOKING_VERTEX / GL_VIEWPORT_INDEX_PROVOKING_VERTEX were a hard-coded
// GL_LAST_VERTEX_CONVENTION for both backends, derived from nothing, and wrong on both test
// devices in opposite directions. DirectGLES now forwards what its loader resolved; DirectVulkan
// reports GL_UNDEFINED_VERTEX, which GL 4.6 table 23.65 permits and which is what the backend
// honestly implements - the provoking mode is chosen per pipeline out of VK_EXT_provoking_vertex,
// provokingVertexModePerPipeline and the topology.
TEST(ProvokingVertexConventions, EachBackendReportsWhatItActuallyPins) {
using namespace MobileGL;
MG_Backend::DirectGLES::BackendObject_DirectGLES glesBackend;
MG_External::GLESCapabilities glesCaps;
glesCaps.LayerProvokingVertex = GL_FIRST_VERTEX_CONVENTION;
glesCaps.ViewportIndexProvokingVertex = GL_UNDEFINED_VERTEX;
glesBackend.ApplyGLESCapabilitiesForTesting(glesCaps);
EXPECT_EQ(glesBackend.GetDynamicParameters().LayerProvokingVertex,
static_cast<GLenum>(GL_FIRST_VERTEX_CONVENTION));
EXPECT_EQ(glesBackend.GetDynamicParameters().ViewportIndexProvokingVertex,
static_cast<GLenum>(GL_UNDEFINED_VERTEX));
MG_Backend::DirectVulkan::BackendObject_DirectVulkan vkBackend;
MG_External::VulkanCapabilities vkCaps;
vkBackend.ApplyVulkanCapabilitiesForTesting(vkCaps);
EXPECT_EQ(vkBackend.GetDynamicParameters().LayerProvokingVertex, static_cast<GLenum>(GL_UNDEFINED_VERTEX));
EXPECT_EQ(vkBackend.GetDynamicParameters().ViewportIndexProvokingVertex,
static_cast<GLenum>(GL_UNDEFINED_VERTEX));
}
TEST(FragmentInterpolationCapabilities, PlumbsGLESAndBothVulkanPropertyPaths) {
using namespace MobileGL;