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Set the blender description manually for the UI renderer

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Mr-Wiseguy 2025-03-15 00:23:54 -04:00
parent 6d105ecbec
commit 9284346fe2
1 changed files with 13 additions and 1 deletions
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14
src/ui/ui_renderer.cpp
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@ -211,7 +211,19 @@ public:
// Create the pipeline description
RT64::RenderGraphicsPipelineDesc pipeline_desc{};
pipeline_desc.renderTargetBlend[0] = RT64::RenderBlendDesc::AlphaBlend();
// Set up alpha blending for non-premultiplied alpha. RmlUi recommends using premultiplied alpha normally,
// but that would require preprocessing all input files, which would be difficult for user-provided content (such as mods).
// This blending setup produces similar results as premultipled alpha but for normal assets as it multiplies during blending and
// computes the output alpha value the same way that a premultipled alpha blender would.
pipeline_desc.renderTargetBlend[0] = RT64::RenderBlendDesc {
.blendEnabled = true,
.srcBlend = RT64::RenderBlend::SRC_ALPHA,
.dstBlend = RT64::RenderBlend::INV_SRC_ALPHA,
.blendOp = RT64::RenderBlendOperation::ADD,
.srcBlendAlpha = RT64::RenderBlend::ONE,
.dstBlendAlpha = RT64::RenderBlend::INV_SRC_ALPHA,
.blendOpAlpha = RT64::RenderBlendOperation::ADD,
};
pipeline_desc.renderTargetFormat[0] = SwapChainFormat; // TODO: Use whatever format the swap chain was created with.
pipeline_desc.renderTargetCount = 1;
pipeline_desc.cullMode = RT64::RenderCullMode::NONE;