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[Fix] (MG_Backend/DirectVulkan): ignore glClear/glClearBuffer* while GL_RASTERIZER_DISCARD is enabled, and early-out on an empty clear mask

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swung0x48
2026-07-16 21:17:58 -04:00
parent 56db115a1a
commit eb5b4bca3e
1 changed files with 11 additions and 0 deletions
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MobileGL/MG_Backend/DirectVulkan/Renderer/VulkanRenderer.cpp
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@@ -3586,6 +3586,13 @@ void main() {
void VulkanRenderer::Clear(GLbitfield mask) {
m_clearManager->CollectGarbage();
if ((mask & (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)) == 0) {
return;
}
// GL 3.3 §3.1: when RASTERIZER_DISCARD is enabled, Clear and ClearBuffer* are ignored.
if (MG_State::pGLContext->IsCapabilityEnabled(CapabilityInput::RasterizerDiscard)) {
return;
}
auto* fbo = MG_State::pGLContext->GetFramebufferBindingSlot(FramebufferTarget::Draw).GetBoundObject().get();
MOBILEGL_ASSERT(fbo, "VulkanRenderer::Clear: draw framebuffer not found (fbo == nullptr)");
if (IsUnsupportedFramebufferForDirectVulkan(*fbo)) {
@@ -3717,6 +3724,10 @@ void main() {
const MG_State::GLState::FramebufferObject& framebuffer, GLenum buffer, GLint drawbuffer,
const ClearAttachmentPayload& clearPayload) {
m_clearManager->CollectGarbage();
// GL 3.3 §3.1: when RASTERIZER_DISCARD is enabled, Clear and ClearBuffer* are ignored.
if (MG_State::pGLContext->IsCapabilityEnabled(CapabilityInput::RasterizerDiscard)) {
return;
}
if (IsUnsupportedFramebufferForDirectVulkan(framebuffer)) {
RecordUnsupportedFramebufferError(__func__);
return;