Function load_texture_image

examples/utils/load_texture_image.cpp:36–156

}

bool load_texture_image(const resource_desc &desc, subresource_data &data, std::vector<std::vector<uint8_t>> &data_to_delete)
{
#if RESHADE_ADDON_TEXTURE_LOAD_HASH_TEXMOD
	// Behavior of the original TexMod (see https://github.com/codemasher/texmod/blob/master/uMod_DX9/uMod_TextureFunction.cpp#L41)
	const uint32_t hash = ~compute_crc32(
		static_cast<const uint8_t *>(data.data),
		desc.texture.height * static_cast<size_t>(
			(desc.texture.format >= format::bc1_typeless && desc.texture.format <= format::bc1_unorm_srgb) || (desc.texture.format >= format::bc4_typeless && desc.texture.format <= format::bc4_snorm) ? (desc.texture.width * 4) / 8 :
			(desc.texture.format >= format::bc2_typeless && desc.texture.format <= format::bc2_unorm_srgb) || (desc.texture.format >= format::bc3_typeless && desc.texture.format <= format::bc3_unorm_srgb) || (desc.texture.format >= format::bc5_typeless && desc.texture.format <= format::bc7_unorm_srgb) ? desc.texture.width :
			format_row_pitch(desc.texture.format, desc.texture.width)));
#else
	// Correct hash calculation using entire resource data
	const uint32_t hash = compute_crc32(
		static_cast<const uint8_t *>(data.data),
		format_slice_pitch(desc.texture.format, data.row_pitch, desc.texture.height));
#endif

	const std::filesystem::path file_path = make_texture_file_path(hash);

	// Check if a replacement file for this texture hash exists and if so, overwrite the texture data with its contents
	if (!std::filesystem::exists(file_path))
		return false;

	int width = 0, height = 0, channels = 0;
	stbi_uc *const rgba_pixel_data_p = stbi_load(file_path.u8string().c_str(), &width, &height, &channels, STBI_rgb_alpha);
	if (rgba_pixel_data_p == nullptr)
		return false;

	std::vector<uint8_t> pixel_data(rgba_pixel_data_p, rgba_pixel_data_p + static_cast<size_t>(width) * static_cast<size_t>(height) * 4);

	stbi_image_free(rgba_pixel_data_p);

	// Only support changing pixel data, but not texture dimensions
	if (desc.texture.width != static_cast<uint32_t>(width) ||
		desc.texture.height != static_cast<uint32_t>(height))
	{
		reshade::log::message(reshade::log::level::error, "Failed to replace texture data because dimensions do not match!");
		return false;
	}

	switch (desc.texture.format)
	{
	case format::l8_unorm:
	case format::a8_unorm:
	case format::r8_typeless:
	case format::r8_unorm:
	case format::r8_snorm:
		for (size_t y = 0; y < static_cast<size_t>(height); ++y)
		{
			for (size_t x = 0; x < static_cast<size_t>(width); ++x)
			{
				const uint8_t *const src = pixel_data.data() + (y * width + x) * 4;
				uint8_t *const dst = pixel_data.data() + (y * width + x);

				dst[0] = src[0];
			}
		}
		pixel_data.resize(static_cast<size_t>(width) * static_cast<size_t>(height));