Function _sg_metal_encode_texture_pixels

source/graphics_platform_d3d11.cpp:336–369

}

static void _sg_metal_encode_texture_pixels(int x, int y, int w, int h, id<MTLTexture> mtl_src_texture, void* pixels) {
    SOKOL_ASSERT(!_sg.mtl.in_pass);
    _sg_metal_commit_command_buffer();
    MTLTextureDescriptor* mtl_dst_texture_desc = [MTLTextureDescriptor texture2DDescriptorWithPixelFormat:mtl_src_texture.pixelFormat width:w height:h mipmapped:NO];
    mtl_dst_texture_desc.storageMode = MTLStorageModeManaged;
    mtl_dst_texture_desc.resourceOptions = MTLResourceStorageModeManaged;
    mtl_dst_texture_desc.usage = MTLTextureUsageShaderRead + MTLTextureUsageShaderWrite;
    id<MTLTexture> mtl_dst_texture = [mtl_src_texture.device newTextureWithDescriptor:mtl_dst_texture_desc];
    id<MTLCommandBuffer> cmd_buffer = [_sg.mtl.cmd_queue commandBuffer];
    id<MTLBlitCommandEncoder> blit_encoder = [cmd_buffer blitCommandEncoder];
    [blit_encoder copyFromTexture:mtl_src_texture
        sourceSlice:0
        sourceLevel:0
        sourceOrigin:MTLOriginMake(x,y,0)
        sourceSize:MTLSizeMake(w,h,1)
        toTexture:mtl_dst_texture
        destinationSlice:0
        destinationLevel:0
        destinationOrigin:MTLOriginMake(0,0,0)
    ];
    [blit_encoder synchronizeTexture:mtl_dst_texture slice:0 level:0];
    [blit_encoder endEncoding];
    [cmd_buffer commit];
    [cmd_buffer waitUntilCompleted];

    MTLRegion mtl_region = MTLRegionMake2D(0, 0, w, h);
    void* temp_pixels = (void*)SOKOL_MALLOC(w * 4 * h);
    SOKOL_ASSERT(temp_pixels);
    [mtl_dst_texture getBytes:temp_pixels bytesPerRow:w * 4 fromRegion:mtl_region mipmapLevel:0];
    int res = SDL_ConvertPixels(w, h, _sg_metal_texture_format_to_sdl_pixel_format(mtl_dst_texture_desc.pixelFormat), temp_pixels, w * 4, SDL_PIXELFORMAT_RGBA32, pixels, w * 4);
    SOKOL_FREE(temp_pixels);
    SOKOL_ASSERT(res == 0);
    _SOKOL_UNUSED(res);
}

static void _sg_metal_query_image_pixels(_sg_image_t* img, void* pixels) {
    id<MTLTexture> mtl_src_texture = _sg.mtl.idpool.pool[img->mtl.tex[0]];