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Fix WebGPU resize and presentation behavior #11

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Merged
Atrix256 merged 1 commit into from
Feb 15, 2026
Merged

Fix WebGPU resize and presentation behavior #11

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13 changes: 4 additions & 9 deletions thirteen.h
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Original file line number Diff line number Diff line change
Expand Up @@ -746,13 +746,9 @@ namespace Thirteen
{
if (!s_instance)
return EM_FALSE;
int canvasWidth = 0;
int canvasHeight = 0;
if (emscripten_get_canvas_element_size(c_canvasSelector, &canvasWidth, &canvasHeight) == EMSCRIPTEN_RESULT_SUCCESS)
{
if (canvasWidth > 0 && canvasHeight > 0 && ((uint32)canvasWidth != width || (uint32)canvasHeight != height))
SetSize((uint32)canvasWidth, (uint32)canvasHeight);
}
// Do not implicitly call SetSize() here. SetSize() can reallocate the pixel
// buffer and return a new pointer, which must be handled by application code.
// Automatic canvas resize events cannot safely propagate that new pointer.
return EM_TRUE;
}

Expand Down Expand Up @@ -807,7 +803,7 @@ namespace Thirteen
WGPUQueue queue = nullptr;
WGPUInstance instance = nullptr;
WGPUSurface surface = nullptr;
WGPUTextureFormat surfaceFormat = WGPUTextureFormat_BGRA8Unorm;
WGPUTextureFormat surfaceFormat = WGPUTextureFormat_RGBA8Unorm;
uint32 configuredWidth = 0;
uint32 configuredHeight = 0;
bool adapterRequestPending = false;
Expand Down Expand Up @@ -968,7 +964,6 @@ namespace Thirteen
WGPUExtent3D writeSize = { width, height, 1 };
wgpuQueueWriteTexture(queue, &dst, pixels, (size_t)width * (size_t)height * 4u, &layout, &writeSize);

wgpuSurfacePresent(surface);
wgpuTextureRelease(surfaceTexture.texture);
return true;
}
Expand Down