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gdi32: Add a helper to return the maximum level to use for a given anti-aliasing format.

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Huw Davies 2011-11-16 11:20:50 +00:00 committed by Alexandre Julliard
parent 2bffcedc82
commit f3fab96393
1 changed files with 25 additions and 19 deletions
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44
dlls/gdi32/freetype.c
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@ -5038,6 +5038,17 @@ static inline BOOL is_identity_MAT2(const MAT2 *matrix)
return !memcmp(matrix, &identity, sizeof(MAT2));
}
static inline BYTE get_max_level( UINT format )
{
switch( format )
{
case GGO_GRAY2_BITMAP: return 4;
case GGO_GRAY4_BITMAP: return 16;
case GGO_GRAY8_BITMAP: return 64;
}
return 255;
}
static DWORD get_glyph_outline(GdiFont *incoming_font, UINT glyph, UINT format,
LPGLYPHMETRICS lpgm, DWORD buflen, LPVOID buf,
const MAT2* lpmat)
@ -5337,7 +5348,7 @@ static DWORD get_glyph_outline(GdiFont *incoming_font, UINT glyph, UINT format,
case GGO_GRAY8_BITMAP:
case WINE_GGO_GRAY16_BITMAP:
{
unsigned int mult, row, col;
unsigned int max_level, row, col;
BYTE *start, *ptr;
width = lpgm->gmBlackBoxX;
@ -5347,6 +5358,8 @@ static DWORD get_glyph_outline(GdiFont *incoming_font, UINT glyph, UINT format,
if(!buf || !buflen) break;
max_level = get_max_level( format );
switch(ft_face->glyph->format) {
case ft_glyph_format_bitmap:
{
@ -5379,29 +5392,22 @@ static DWORD get_glyph_outline(GdiFont *incoming_font, UINT glyph, UINT format,
pFT_Outline_Get_Bitmap(library, &ft_face->glyph->outline, &ft_bitmap);
if(format == GGO_GRAY2_BITMAP)
mult = 4;
else if(format == GGO_GRAY4_BITMAP)
mult = 16;
else if(format == GGO_GRAY8_BITMAP)
mult = 64;
else /* format == WINE_GGO_GRAY16_BITMAP */
return needed;
break;
if (max_level != 255)
{
for (row = 0, start = buf; row < height; row++)
{
for (col = 0, ptr = start; col < width; col++, ptr++)
*ptr = (((int)*ptr) * max_level + 128) / 256;
start += pitch;
}
}
return needed;
}
default:
FIXME("loaded glyph format %x\n", ft_face->glyph->format);
return GDI_ERROR;
}
start = buf;
for(row = 0; row < height; row++) {
ptr = start;
for(col = 0; col < width; col++, ptr++) {
*ptr = (((int)*ptr) * mult + 128) / 256;
}
start += pitch;
}
break;
}