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windowscodecs/tests: Add tests for decoding BC3 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 10:03:04 +08:00 committed by Alexandre Julliard
parent e23516daf2
commit 8e59928778
1 changed files with 66 additions and 1 deletions
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67
dlls/windowscodecs/tests/ddsformat.c
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@ -629,6 +629,67 @@ static void decode_bc2(const BYTE *blocks, UINT block_count, UINT width, UINT he
}
}
static void decode_bc3(const BYTE *block_data, UINT block_count, UINT width, UINT height, DWORD *buffer)
{
static const UINT BLOCK_SIZE = 16;
int i, j, color_index, alpha_index, block_x, block_y, x, y;
const BYTE *block, *color_indices, *alpha_indices;
WORD color[4];
BYTE alpha[8];
block_x = 0;
block_y = 0;
for (i = 0; i < block_count; i++)
{
block = block_data + 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[0] = *block;
alpha[1] = *(block + 1);
if (alpha[0] > alpha[1]) {
for (j = 2; j < 8; j++)
{
alpha[j] = (BYTE)((alpha[0] * (8 - j) + alpha[1] * (j - 1) + 3) / 7);
}
} else {
for (j = 2; j < 6; j++)
{
alpha[j] = (BYTE)((alpha[0] * (6 - j) + alpha[1] * (j - 1) + 2) / 5);
}
alpha[6] = 0;
alpha[7] = 0xFF;
}
alpha_indices = block + 2;
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_index = (*((DWORD *)(alpha_indices + (j / 8) * 3)) >> ((j % 8) * 3)) & 0x7;
color_index = (color_indices[j / 4] >> ((j % 4) * 2)) & 0x3;
buffer[x + y * width] = rgb565_to_argb(color[color_index], alpha[alpha_index]);
}
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;
@ -1080,7 +1141,8 @@ static void test_dds_decoder_frame_data(IWICBitmapFrameDecode* frame, IWICDdsFra
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 ||
format_info.DxgiFormat == DXGI_FORMAT_BC2_UNORM ) {
format_info.DxgiFormat == DXGI_FORMAT_BC2_UNORM ||
format_info.DxgiFormat == DXGI_FORMAT_BC3_UNORM ) {
switch (format_info.DxgiFormat)
{
case DXGI_FORMAT_BC1_UNORM:
@ -1089,6 +1151,9 @@ static void test_dds_decoder_frame_data(IWICBitmapFrameDecode* frame, IWICDdsFra
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;
case DXGI_FORMAT_BC3_UNORM:
decode_bc3(test_data[i].data + block_offset, width_in_blocks * height_in_blocks, frame_width, frame_height, pixels);
break;
default:
break;
}