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Add WebGPU Backend w/ Dawn Support (#3838)

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This commit is contained in:
Birk Skyum
2025-10-16 20:35:33 +02:00
committed by GitHub
parent cd129e873a
commit 68459732be
119 changed files with 14067 additions and 28 deletions
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43
src/mbgl/renderer/paint_parameters.cpp
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@@ -15,6 +15,11 @@
#include <mbgl/shaders/gl/legacy/clipping_mask_program.hpp>
#endif
#if MLN_RENDER_BACKEND_WEBGPU
#include <mbgl/webgpu/context.hpp>
#include <mbgl/shaders/webgpu/clipping_mask.hpp>
#endif
#if MLN_RENDER_BACKEND_METAL
#include <mbgl/mtl/context.hpp>
#include <mbgl/shaders/mtl/clipping_mask.hpp>
@@ -155,6 +160,9 @@ void PaintParameters::clearStencil() {
const auto& vulkanRenderPass = static_cast<vulkan::RenderPass&>(*renderPass);
vulkanRenderPass.clearStencil();
context.renderingStats().stencilClears++;
#elif MLN_RENDER_BACKEND_WEBGPU
// WebGPU clears stencil through render pass descriptor
context.renderingStats().stencilClears++;
#elif MLN_RENDER_BACKEND_OPENGL
context.clearStencilBuffer(0b00000000);
@@ -176,7 +184,40 @@ void PaintParameters::renderTileClippingMasks(const RenderTiles& renderTiles) {
clearStencil();
}
#if MLN_RENDER_BACKEND_METAL
#if MLN_RENDER_BACKEND_WEBGPU
std::vector<shaders::ClipUBO> tileUBOs;
for (const auto& tileRef : *renderTiles) {
const auto& tileID = tileRef.get().id;
const int32_t stencilID = nextStencilID;
const auto result = tileClippingMaskIDs.insert(std::make_pair(tileID, stencilID));
if (result.second) {
nextStencilID++;
} else {
continue;
}
if (tileUBOs.empty()) {
tileUBOs.reserve(count);
}
tileUBOs.emplace_back(shaders::ClipUBO{/* .matrix = */ util::cast<float>(matrixForTile(tileID)),
/* .stencil_ref = */ static_cast<uint32_t>(stencilID),
/* .pad1 = */ 0,
/* .pad2 = */ 0,
/* .pad3 = */ 0});
}
if (!tileUBOs.empty()) {
#if !defined(NDEBUG)
const auto debugGroup = renderPass->createDebugGroup("tile-clip-masks");
#endif
auto& webgpuContext = static_cast<webgpu::Context&>(context);
webgpuContext.renderTileClippingMasks(*renderPass, staticData, tileUBOs);
webgpuContext.renderingStats().stencilUpdates++;
}
#elif MLN_RENDER_BACKEND_METAL
// Assign a stencil ID and build a UBO for each tile in the set
std::vector<shaders::ClipUBO> tileUBOs;
for (const auto& tileRef : *renderTiles) {