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[Feat] (MG_Backend): wire primitive restart into both backends; detect dualSrcBlend

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Make GL_PRIMITIVE_RESTART[_FIXED_INDEX] actually take effect at draw time,
following the detect-at-init / POST / fallback-or-hard-fail discipline.

DirectVulkan:
- Thread primitiveRestartEnable through the pipeline (payload + hash +
  input-assembly), set from the GL_PRIMITIVE_RESTART / _FIXED_INDEX caps.
- Detect and enable primitiveTopologyListRestart
  (VK_EXT_primitive_topology_list_restart) at device creation; cache it.
  Strip/fan restart needs no feature; a *list* topology with restart and
  no feature hard-fails at the draw with the reason.
- Vulkan only restarts on the fixed all-ones index value, so an arbitrary
  GL_PRIMITIVE_RESTART index that is not that value hard-fails in
  UploadAndBindIndexBuffer (where the index type is known).
- Also detect+enable and cache the dualSrcBlend base feature (groundwork
  for GL_SRC1_* dual-source blending).

DirectGLES:
- Sync GL_PRIMITIVE_RESTART_FIXED_INDEX from either restart cap (GLES core
  has only the fixed-index form); an arbitrary non-fixed index hard-fails
  in the indexed draw paths with the reason.

POST: dualSrcBlend and primitiveTopologyListRestart capability rows (Pass
when supported, Warn with the fallback/hard-fail consequence otherwise).

Library builds clean; SanityTest 31/31. (The actual restart rendering and
the hard-fail paths need a real GPU and are not runtime-testable here.)
This commit is contained in:
swung0x48
2026-07-11 01:11:23 -04:00
parent e18d369adf
commit e9fa99e16b
6 changed files with 147 additions and 1 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/PipelineFactory.cpp
+3
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@@ -126,6 +126,8 @@ namespace MobileGL::MG_Backend::DirectVulkan {
XXHASH_VERIFY(XXH64_update(m_hashState, &payload.rasterizationSamples, sizeof(payload.rasterizationSamples)));
XXHASH_VERIFY(XXH64_update(m_hashState, &payload.subpass, sizeof(payload.subpass)));
XXHASH_VERIFY(XXH64_update(m_hashState, &payload.topology, sizeof(payload.topology)));
XXHASH_VERIFY(
XXH64_update(m_hashState, &payload.primitiveRestartEnable, sizeof(payload.primitiveRestartEnable)));
XXHASH_VERIFY(XXH64_update(m_hashState, &payload.polygonMode, sizeof(payload.polygonMode)));
XXHASH_VERIFY(XXH64_update(m_hashState, &payload.cullMode, sizeof(payload.cullMode)));
XXHASH_VERIFY(XXH64_update(m_hashState, &payload.frontFace, sizeof(payload.frontFace)));
@@ -212,6 +214,7 @@ namespace MobileGL::MG_Backend::DirectVulkan {
VkPipelineInputAssemblyStateCreateInfo ia{VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO};
ia.topology = payload.topology;
ia.primitiveRestartEnable = payload.primitiveRestartEnable ? VK_TRUE : VK_FALSE;
VkPipelineViewportStateCreateInfo vpci{VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO};
vpci.viewportCount = 1;