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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>
This commit is contained in:
Ziqing Hui 2020-08-19 10:02:35 +08:00 committed by Alexandre Julliard
parent 5e000b1830
commit e23516daf2
1 changed files with 61 additions and 8 deletions
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69
dlls/windowscodecs/tests/ddsformat.c
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@ -535,11 +535,11 @@ end:
return bpp;
}
static DWORD rgb565_to_argb(WORD color, BOOL has_alpha)
static DWORD rgb565_to_argb(WORD color, BYTE alpha)
{
return (has_alpha && !color) ? 0: MAKE_ARGB(0xFF, (GET_RGB565_R(color) * 0xFF + 0x0F) / 0x1F,
(GET_RGB565_G(color) * 0xFF + 0x1F) / 0x3F,
(GET_RGB565_B(color) * 0xFF + 0x0F) / 0x1F);
return MAKE_ARGB(alpha, (GET_RGB565_R(color) * 0xFF + 0x0F) / 0x1F,
(GET_RGB565_G(color) * 0xFF + 0x1F) / 0x3F,
(GET_RGB565_B(color) * 0xFF + 0x0F) / 0x1F);
}
static void decode_bc1(const BYTE *blocks, UINT block_count, UINT width, UINT height, DWORD *buffer)
@ -580,12 +580,55 @@ static void decode_bc1(const BYTE *blocks, UINT block_count, UINT width, UINT he
(pixel_index / stride >= height)) continue;
color_index = (color_indices[j / 4] >> ((j % 4) * 2)) & 0x3;
*pixel = rgb565_to_argb(color[color_index], has_alpha);
*pixel = (has_alpha && !color[color_index])? 0: rgb565_to_argb(color[color_index], 0xFF);
pixel++;
}
}
}
static void decode_bc2(const BYTE *blocks, UINT block_count, UINT width, UINT height, DWORD *buffer)
{
static const UINT BLOCK_SIZE = 16;
int i, j, alpha, color_index, block_x, block_y, x, y;
const BYTE *block, *color_indices, *alpha_table;
WORD color[4];
block_x = 0;
block_y = 0;
for (i = 0; i < block_count; i++)
{
block = blocks + i * BLOCK_SIZE;
color[0] = *((WORD *)(block + 8));
color[1] = *((WORD *)(block + 10));
color[2] = MAKE_RGB565(((GET_RGB565_R(color[0]) * 2 + GET_RGB565_R(color[1]) + 1) / 3),
((GET_RGB565_G(color[0]) * 2 + GET_RGB565_G(color[1]) + 1) / 3),
((GET_RGB565_B(color[0]) * 2 + GET_RGB565_B(color[1]) + 1) / 3));
color[3] = MAKE_RGB565(((GET_RGB565_R(color[0]) + GET_RGB565_R(color[1]) * 2 + 1) / 3),
((GET_RGB565_G(color[0]) + GET_RGB565_G(color[1]) * 2 + 1) / 3),
((GET_RGB565_B(color[0]) + GET_RGB565_B(color[1]) * 2 + 1) / 3));
alpha_table = block;
color_indices = block + 12;
for (j = 0; j < 16; j++)
{
x = block_x + j % 4;
y = block_y + j / 4;
if (x >= width || y >= height) continue;
alpha = (alpha_table[j / 2] >> (j % 2) * 4) & 0xF;
color_index = (color_indices[j / 4] >> ((j % 4) * 2)) & 0x3;
buffer[x + y * width] = rgb565_to_argb(color[color_index], (BYTE)((alpha * 0xFF + 0x7)/ 0xF));
}
block_x += 4;
if (block_x >= width) {
block_x = 0;
block_y += 4;
}
}
}
static BOOL color_match(DWORD color_a, DWORD color_b)
{
static const int tolerance = 8;
@ -1036,8 +1079,19 @@ static void test_dds_decoder_frame_data(IWICBitmapFrameDecode* frame, IWICDdsFra
hr = IWICBitmapFrameDecode_CopyPixels(frame, &rect, stride, sizeof(buffer), NULL);
ok(hr == E_INVALIDARG, "Test %u, frame %u: CopyBlocks got unexpected hr %#x\n", i, frame_index, hr);
if (format_info.DxgiFormat == DXGI_FORMAT_BC1_UNORM) {
decode_bc1(test_data[i].data + block_offset, width_in_blocks * height_in_blocks, frame_width, frame_height, pixels);
if (format_info.DxgiFormat == DXGI_FORMAT_BC1_UNORM ||
format_info.DxgiFormat == DXGI_FORMAT_BC2_UNORM ) {
switch (format_info.DxgiFormat)
{
case DXGI_FORMAT_BC1_UNORM:
decode_bc1(test_data[i].data + block_offset, width_in_blocks * height_in_blocks, frame_width, frame_height, pixels);
break;
case DXGI_FORMAT_BC2_UNORM:
decode_bc2(test_data[i].data + block_offset, width_in_blocks * height_in_blocks, frame_width, frame_height, pixels);
break;
default:
break;
}
hr = IWICBitmapFrameDecode_CopyPixels(frame, &rect, stride, sizeof(buffer), buffer);
ok(hr == S_OK, "Test %u, frame %u: CopyPixels failed, hr %#x\n", i, frame_index, hr);
@ -1047,7 +1101,6 @@ static void test_dds_decoder_frame_data(IWICBitmapFrameDecode* frame, IWICDdsFra
"Test %u, frame %u: Pixels mismatch\n", i, frame_index);
}
hr = IWICBitmapFrameDecode_CopyPixels(frame, NULL, frame_stride, sizeof(buffer), buffer);
ok(hr == S_OK, "Test %u, frame %u: CopyPixels failed, hr %#x\n", i, frame_index, hr);
if (hr == S_OK) {