Function imageDecodeToBgra8

3rdparty/bimg/src/image.cpp:4555–4965

	}

	void imageDecodeToBgra8(bx::AllocatorI* _allocator, void* _dst, const void* _src, uint32_t _width, uint32_t _height, uint32_t _dstPitch, TextureFormat::Enum _srcFormat)
	{
		const uint8_t* src = (const uint8_t*)_src;
		uint8_t* dst = (uint8_t*)_dst;

		uint32_t width  = _width/4;
		uint32_t height = _height/4;

		uint8_t temp[16*4];

		switch (_srcFormat)
		{
		case TextureFormat::BC1:
			if (BX_ENABLED(BIMG_DECODE_BC1) )
			{
				for (uint32_t yy = 0; yy < height; ++yy)
				{
					for (uint32_t xx = 0; xx < width; ++xx)
					{
						decodeBlockDxt1(temp, src);
						src += 8;

						uint8_t* block = &dst[yy*_dstPitch*4 + xx*16];
						bx::memCopy(&block[0*_dstPitch], &temp[ 0], 16);
						bx::memCopy(&block[1*_dstPitch], &temp[16], 16);
						bx::memCopy(&block[2*_dstPitch], &temp[32], 16);
						bx::memCopy(&block[3*_dstPitch], &temp[48], 16);
					}
				}
			}
			else
			{
				BX_WARN(false, "BC1 decoder is disabled (BIMG_DECODE_BC1).");
				imageCheckerboard(_dst, _width, _height, 16, UINT32_C(0xff000000), UINT32_C(0xff00ff00) );
			}
			break;

		case TextureFormat::BC2:
			if (BX_ENABLED(BIMG_DECODE_BC2) )
			{
				for (uint32_t yy = 0; yy < height; ++yy)
				{
					for (uint32_t xx = 0; xx < width; ++xx)
					{
						decodeBlockDxt23A(temp+3, src);
						src += 8;
						decodeBlockDxt(temp, src);
						src += 8;

						uint8_t* block = &dst[yy*_dstPitch*4 + xx*16];
						bx::memCopy(&block[0*_dstPitch], &temp[ 0], 16);
						bx::memCopy(&block[1*_dstPitch], &temp[16], 16);
						bx::memCopy(&block[2*_dstPitch], &temp[32], 16);
						bx::memCopy(&block[3*_dstPitch], &temp[48], 16);
					}
				}
			}
			else