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dwrite: Handle 8bpp gray bitmaps for bitmap target. 

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Nikolay Sivov 2017-09-05 13:35:27 +03:00 committed by Alexandre Julliard
parent 2e12f7cdd6
commit 55aedbffa6
1 changed files with 26 additions and 16 deletions
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42
dlls/dwrite/gdiinterop.c
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@ -256,22 +256,6 @@ static inline DWORD *get_pixel_ptr_32(struct dib_data *dib, int x, int y)
return (DWORD *)((BYTE*)dib->ptr + y * dib->stride + x * 4);
}
static void blit_8(struct dib_data *dib, const BYTE *src, const RECT *rect, DWORD text_pixel)
{
DWORD *dst_ptr = get_pixel_ptr_32(dib, rect->left, rect->top);
int x, y, src_width = rect->right - rect->left;
for (y = rect->top; y < rect->bottom; y++) {
for (x = 0; x < src_width; x++) {
if (src[x] < DWRITE_ALPHA_MAX) continue;
dst_ptr[x] = text_pixel;
}
src += src_width;
dst_ptr += dib->stride / 4;
}
}
static inline BYTE blend_color(BYTE dst, BYTE src, BYTE alpha)
{
return (src * alpha + dst * (255 - alpha) + 127) / 255;
@ -284,6 +268,32 @@ static inline DWORD blend_subpixel(BYTE r, BYTE g, BYTE b, DWORD text, const BYT
blend_color(b, text, alpha[2]);
}
static inline DWORD blend_pixel(BYTE r, BYTE g, BYTE b, DWORD text, BYTE alpha)
{
return blend_color(r, text >> 16, alpha) << 16 |
blend_color(g, text >> 8, alpha) << 8 |
blend_color(b, text, alpha);
}
static void blit_8(struct dib_data *dib, const BYTE *src, const RECT *rect, DWORD text_pixel)
{
DWORD *dst_ptr = get_pixel_ptr_32(dib, rect->left, rect->top);
int x, y, src_width = rect->right - rect->left;
for (y = rect->top; y < rect->bottom; y++) {
for (x = 0; x < src_width; x++) {
if (src[x]) continue;
if (src[x] == DWRITE_ALPHA_MAX)
dst_ptr[x] = text_pixel;
else
dst_ptr[x] = blend_pixel(dst_ptr[x] >> 16, dst_ptr[x] >> 8, dst_ptr[x], text_pixel, src[x]);
}
src += src_width;
dst_ptr += dib->stride / 4;
}
}
static void blit_subpixel_888(struct dib_data *dib, int dib_width, const BYTE *src,
const RECT *rect, DWORD text_pixel)
{