Hi,
OK, the problem with emscripten wgpu::Texture::GetFormat is in the
wgpuTextureGetFormat function in library_webgpu.js
This is currently just directly returning webgpu texture.format, which is a
string (eg: "rgba8unorm"), but dawn texture formats are ints so this needs
to be converted.
I verified this is the problem by hacking wgpuTextureGetFormat to handle
just the formats I use:
wgpuTextureGetFormat: function(textureId) {
var texture = WebGPU.mgrTexture.get(textureId);
// Note: This switch currently MIA!
switch(texture.format) {
case 'rgba8unorm':return 18;
case 'rgba8unorm-srgb':return 19;
}
return 0;
},
Bye!
Mark
On Wednesday, February 8, 2023 at 1:33:09 PM UTC+13 Mark Sibly wrote:
> Hi,
>
> I'm writing an emscripten/webgpu app and Texture::GetFormat() is always
> returning 0. The texture is otherwise working and usable so I can work
> around it for now.
>
> GetFormat works as expected with the same code built natively using the
> dawn lib, and GetWidth and GetHeight are also working fin on both
> emscripten and native.
>
> Here's my texture creation code:
>
> wgpu::Extent3D size = {width, height, 1};
>
> wgpu::TextureDescriptor desc;
> desc.usage = usage;
> desc.dimension = wgpu::TextureDimension::e2D;
> desc.size = size;
> desc.format = format;
> desc.mipLevelCount = mipmap ?
> (uint32_t)std::floor(log2(std::min(width, height))) + 1 : 1;
> desc.sampleCount = 1;
>
> log() << "### Creating texture:" << (int)desc.format <<
> desc.size.width << desc.size.height;
>
> auto texture = device.CreateTexture(&desc);
>
> log() << "### Created texture:" << (int)texture.GetFormat() <<
> texture.GetWidth() << texture.GetHeight();
>
> I had a quick look at the library_webgpu.js code but the 2 lines there
> look fine.
>
> Also, emscripten wgpu::Buffer appears to be missing the GetMapState()
> member, ditto
> wgpuBufferGetMapState.
>
> Bye!
> Mark
>
>
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