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gdi32: Implement the conversion between two identical bitfield dibs.

This commit is contained in:
Huw Davies 2011-07-13 13:04:58 +01:00 committed by Alexandre Julliard
parent ebebee5b9e
commit dddc079d4f
1 changed files with 37 additions and 0 deletions
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37
dlls/gdi32/dibdrv/primitives.c
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@ -719,6 +719,15 @@ static DWORD colorref_to_pixel_null(const dib_info *dib, COLORREF color)
return 0;
}
static inline BOOL bit_fields_match(const dib_info *d1, const dib_info *d2)
{
assert( d1->bit_count > 8 && d1->bit_count == d2->bit_count );
return d1->red_mask == d2->red_mask &&
d1->green_mask == d2->green_mask &&
d1->blue_mask == d2->blue_mask;
}
static BOOL convert_to_8888(dib_info *dst, const dib_info *src, const RECT *src_rect)
{
DWORD *dst_start = dst->bits, *dst_pixel, src_val;
@ -904,6 +913,20 @@ static BOOL convert_to_32(dib_info *dst, const dib_info *src, const RECT *src_re
src_start += src->stride / 4;
}
}
else if(bit_fields_match(src, dst))
{
if(src->stride > 0 && dst->stride > 0 && src_rect->left == 0 && src_rect->right == src->width)
memcpy(dst->bits, src_start, (src_rect->bottom - src_rect->top) * src->stride);
else
{
for(y = src_rect->top; y < src_rect->bottom; y++)
{
memcpy(dst_start, src_start, (src_rect->right - src_rect->left) * 4);
dst_start += dst->stride / 4;
src_start += src->stride / 4;
}
}
}
else
{
FIXME("Unsupported conversion: 32 -> 32\n");
@ -1456,6 +1479,20 @@ static BOOL convert_to_16(dib_info *dst, const dib_info *src, const RECT *src_re
src_start += src->stride / 2;
}
}
else if(bit_fields_match(src, dst))
{
if(src->stride > 0 && dst->stride > 0 && src_rect->left == 0 && src_rect->right == src->width)
memcpy(dst->bits, src_start, (src_rect->bottom - src_rect->top) * src->stride);
else
{
for(y = src_rect->top; y < src_rect->bottom; y++)
{
memcpy(dst_start, src_start, (src_rect->right - src_rect->left) * 2);
dst_start += dst->stride / 2;
src_start += src->stride / 2;
}
}
}
else
{
FIXME("Unsupported conversion: 16 -> 16\n");