windowscodecs/tests: Add tests for decoding BC2 format.
Signed-off-by: Ziqing Hui <zhui@codeweavers.com> Signed-off-by: Esme Povirk <esme@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
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@ -535,9 +535,9 @@ end:
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return bpp;
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}
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static DWORD rgb565_to_argb(WORD color, BOOL has_alpha)
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static DWORD rgb565_to_argb(WORD color, BYTE alpha)
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{
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return (has_alpha && !color) ? 0: MAKE_ARGB(0xFF, (GET_RGB565_R(color) * 0xFF + 0x0F) / 0x1F,
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return MAKE_ARGB(alpha, (GET_RGB565_R(color) * 0xFF + 0x0F) / 0x1F,
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(GET_RGB565_G(color) * 0xFF + 0x1F) / 0x3F,
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(GET_RGB565_B(color) * 0xFF + 0x0F) / 0x1F);
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}
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@ -580,12 +580,55 @@ static void decode_bc1(const BYTE *blocks, UINT block_count, UINT width, UINT he
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(pixel_index / stride >= height)) continue;
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color_index = (color_indices[j / 4] >> ((j % 4) * 2)) & 0x3;
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*pixel = rgb565_to_argb(color[color_index], has_alpha);
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*pixel = (has_alpha && !color[color_index])? 0: rgb565_to_argb(color[color_index], 0xFF);
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pixel++;
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}
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}
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}
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static void decode_bc2(const BYTE *blocks, UINT block_count, UINT width, UINT height, DWORD *buffer)
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{
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static const UINT BLOCK_SIZE = 16;
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int i, j, alpha, color_index, block_x, block_y, x, y;
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const BYTE *block, *color_indices, *alpha_table;
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WORD color[4];
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block_x = 0;
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block_y = 0;
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for (i = 0; i < block_count; i++)
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{
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block = blocks + i * BLOCK_SIZE;
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color[0] = *((WORD *)(block + 8));
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color[1] = *((WORD *)(block + 10));
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color[2] = MAKE_RGB565(((GET_RGB565_R(color[0]) * 2 + GET_RGB565_R(color[1]) + 1) / 3),
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((GET_RGB565_G(color[0]) * 2 + GET_RGB565_G(color[1]) + 1) / 3),
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((GET_RGB565_B(color[0]) * 2 + GET_RGB565_B(color[1]) + 1) / 3));
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color[3] = MAKE_RGB565(((GET_RGB565_R(color[0]) + GET_RGB565_R(color[1]) * 2 + 1) / 3),
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((GET_RGB565_G(color[0]) + GET_RGB565_G(color[1]) * 2 + 1) / 3),
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((GET_RGB565_B(color[0]) + GET_RGB565_B(color[1]) * 2 + 1) / 3));
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alpha_table = block;
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color_indices = block + 12;
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for (j = 0; j < 16; j++)
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{
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x = block_x + j % 4;
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y = block_y + j / 4;
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if (x >= width || y >= height) continue;
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alpha = (alpha_table[j / 2] >> (j % 2) * 4) & 0xF;
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color_index = (color_indices[j / 4] >> ((j % 4) * 2)) & 0x3;
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buffer[x + y * width] = rgb565_to_argb(color[color_index], (BYTE)((alpha * 0xFF + 0x7)/ 0xF));
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}
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block_x += 4;
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if (block_x >= width) {
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block_x = 0;
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block_y += 4;
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}
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}
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}
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static BOOL color_match(DWORD color_a, DWORD color_b)
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{
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static const int tolerance = 8;
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@ -1036,8 +1079,19 @@ static void test_dds_decoder_frame_data(IWICBitmapFrameDecode* frame, IWICDdsFra
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hr = IWICBitmapFrameDecode_CopyPixels(frame, &rect, stride, sizeof(buffer), NULL);
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ok(hr == E_INVALIDARG, "Test %u, frame %u: CopyBlocks got unexpected hr %#x\n", i, frame_index, hr);
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if (format_info.DxgiFormat == DXGI_FORMAT_BC1_UNORM) {
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if (format_info.DxgiFormat == DXGI_FORMAT_BC1_UNORM ||
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format_info.DxgiFormat == DXGI_FORMAT_BC2_UNORM ) {
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switch (format_info.DxgiFormat)
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{
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case DXGI_FORMAT_BC1_UNORM:
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decode_bc1(test_data[i].data + block_offset, width_in_blocks * height_in_blocks, frame_width, frame_height, pixels);
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break;
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case DXGI_FORMAT_BC2_UNORM:
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decode_bc2(test_data[i].data + block_offset, width_in_blocks * height_in_blocks, frame_width, frame_height, pixels);
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break;
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default:
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break;
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}
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hr = IWICBitmapFrameDecode_CopyPixels(frame, &rect, stride, sizeof(buffer), buffer);
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ok(hr == S_OK, "Test %u, frame %u: CopyPixels failed, hr %#x\n", i, frame_index, hr);
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@ -1047,7 +1101,6 @@ static void test_dds_decoder_frame_data(IWICBitmapFrameDecode* frame, IWICDdsFra
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"Test %u, frame %u: Pixels mismatch\n", i, frame_index);
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}
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hr = IWICBitmapFrameDecode_CopyPixels(frame, NULL, frame_stride, sizeof(buffer), buffer);
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ok(hr == S_OK, "Test %u, frame %u: CopyPixels failed, hr %#x\n", i, frame_index, hr);
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if (hr == S_OK) {
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