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[Feat, Test] (MG_Backend/DirectVulkan, MG_Test, MG_IntegrationTest): rasterize the viewport gl_ViewportIndex selects, instead of collapsing all sixteen onto viewport 0

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swung0x48
2026-08-13 04:44:23 -04:00
parent 5fbb17f6b9
commit f41403e227
10 changed files with 947 additions and 13 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/PipelineFactory.cpp
+7 -2
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@@ -206,6 +206,7 @@ namespace MobileGL::MG_Backend::DirectVulkan {
XXHASH_VERIFY(
XXH64_update(m_hashState, &payload.primitiveRestartEnable, sizeof(payload.primitiveRestartEnable)));
XXHASH_VERIFY(XXH64_update(m_hashState, &payload.patchControlPoints, sizeof(payload.patchControlPoints)));
XXHASH_VERIFY(XXH64_update(m_hashState, &payload.viewportCount, sizeof(payload.viewportCount)));
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)));
@@ -406,8 +407,12 @@ namespace MobileGL::MG_Backend::DirectVulkan {
tessellation.patchControlPoints = payload.patchControlPoints;
VkPipelineViewportStateCreateInfo vpci{VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO};
vpci.viewportCount = 1;
vpci.scissorCount = 1;
// Both counts move together: GL has one scissor rectangle per viewport, and Vulkan
// requires viewportCount == scissorCount whenever both are dynamic
// (VUID-VkPipelineViewportStateCreateInfo-scissorCount-04136). The caller has already
// clamped this to the device's multiViewport capability.
vpci.viewportCount = std::max<Uint32>(payload.viewportCount, 1u);
vpci.scissorCount = vpci.viewportCount;
VkPipelineRasterizationStateCreateInfo raster{VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO};
raster.polygonMode = payload.polygonMode;