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webgpu: clamp scissor rect to renderable size (#4106)

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Birk Skyum
2026-02-16 20:43:44 +01:00
committed by GitHub
parent 31237f0803
commit 9737694916
1 changed files with 13 additions and 5 deletions
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18
src/mbgl/webgpu/drawable.cpp
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@@ -841,11 +841,19 @@ void Drawable::draw(PaintParameters& parameters) const {
return;
}
wgpuRenderPassEncoderSetScissorRect(renderPassEncoder,
parameters.scissorRect.x,
parameters.scissorRect.y,
parameters.scissorRect.width,
parameters.scissorRect.height);
// Clamp scissor to the current render pass size (not the default renderable,
// which may be different during offscreen passes like hillshade prepare).
{
const auto& webgpuRP = static_cast<const webgpu::RenderPass&>(*parameters.renderPass);
const auto rtSize = webgpuRP.getDescriptor().renderable.getSize();
const uint32_t sx = static_cast<uint32_t>(parameters.scissorRect.x);
const uint32_t sy = static_cast<uint32_t>(parameters.scissorRect.y);
const uint32_t sw = (sx < rtSize.width) ? std::min(parameters.scissorRect.width, rtSize.width - sx) : 0;
const uint32_t sh = (sy < rtSize.height) ? std::min(parameters.scissorRect.height, rtSize.height - sy) : 0;
if (sw > 0 && sh > 0) {
wgpuRenderPassEncoderSetScissorRect(renderPassEncoder, sx, sy, sw, sh);
}
}
uint32_t bufferSlot = 0;
for (const auto& binding : uniqueBindings) {