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gdi32: Store the initial bitmap bits with DIB alignment.

This commit is contained in:
Alexandre Julliard 2011-08-29 15:09:45 +02:00
parent 8f46cb6b8b
commit a13df5ce6c
1 changed files with 55 additions and 19 deletions
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74
dlls/gdi32/bitmap.c
View File

@ -87,7 +87,7 @@ DWORD nulldrv_GetImage( PHYSDEV dev, HBITMAP hbitmap, BITMAPINFO *info,
src->y -= src->visrect.top;
offset_rect( &src->visrect, 0, -src->visrect.top );
if (bmp->bitmap.bmBits && bmp->bitmap.bmWidthBytes == width_bytes)
if (bmp->bitmap.bmBits)
{
bits->ptr = (char *)bmp->bitmap.bmBits + src->visrect.top * width_bytes;
bits->is_copy = FALSE;
@ -95,20 +95,10 @@ DWORD nulldrv_GetImage( PHYSDEV dev, HBITMAP hbitmap, BITMAPINFO *info,
}
else
{
bits->ptr = HeapAlloc( GetProcessHeap(), 0, info->bmiHeader.biSizeImage );
/* return all-zero bits */
bits->ptr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, info->bmiHeader.biSizeImage );
bits->is_copy = TRUE;
bits->free = free_heap_bits;
if (bmp->bitmap.bmBits)
{
/* fixup the line alignment */
char *src = bmp->bitmap.bmBits, *dst = bits->ptr;
for ( ; height > 0; height--, src += bmp->bitmap.bmWidthBytes, dst += width_bytes)
{
memcpy( dst, src, bmp->bitmap.bmWidthBytes );
memset( dst + bmp->bitmap.bmWidthBytes, 0, width_bytes - bmp->bitmap.bmWidthBytes );
}
}
else memset( bits->ptr, 0, info->bmiHeader.biSizeImage );
}
done:
GDI_ReleaseObj( hbitmap );
@ -153,12 +143,13 @@ DWORD nulldrv_PutImage( PHYSDEV dev, HBITMAP hbitmap, HRGN clip, BITMAPINFO *inf
}
if (!bmp->bitmap.bmBits &&
!(bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), 0,
bmp->bitmap.bmHeight * bmp->bitmap.bmWidthBytes )))
!(bmp->bitmap.bmBits = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
bmp->bitmap.bmHeight * width_bytes )))
{
GDI_ReleaseObj( hbitmap );
return ERROR_OUTOFMEMORY;
}
dst_bits = (unsigned char *)bmp->bitmap.bmBits + dst->visrect.top * width_bytes;
src_bits = bits->ptr;
if (info->bmiHeader.biHeight > 0)
{
@ -168,14 +159,13 @@ DWORD nulldrv_PutImage( PHYSDEV dev, HBITMAP hbitmap, HRGN clip, BITMAPINFO *inf
else
src_bits += src->visrect.top * width_bytes;
dst_bits = (unsigned char *)bmp->bitmap.bmBits + dst->visrect.top * bmp->bitmap.bmWidthBytes;
if (width_bytes != bmp->bitmap.bmWidthBytes)
{
for (i = 0; i < dst->visrect.bottom - dst->visrect.top; i++)
{
memcpy( dst_bits, src_bits, min( abs(width_bytes), bmp->bitmap.bmWidthBytes ));
memcpy( dst_bits, src_bits, bmp->bitmap.bmWidthBytes );
src_bits += width_bytes;
dst_bits += bmp->bitmap.bmWidthBytes;
dst_bits += abs(width_bytes);
}
}
else memcpy( dst_bits, src_bits, width_bytes * (dst->visrect.bottom - dst->visrect.top) );
@ -691,8 +681,54 @@ HBITMAP BITMAP_CopyBitmap(HBITMAP hbitmap)
static void set_initial_bitmap_bits( HBITMAP hbitmap, BITMAPOBJ *bmp )
{
char buffer[FIELD_OFFSET( BITMAPINFO, bmiColors[256] )];
BITMAPINFO *info = (BITMAPINFO *)buffer;
DWORD err;
int width_bytes;
struct bitblt_coords src, dst;
struct gdi_image_bits bits;
if (!bmp->bitmap.bmBits) return;
SetBitmapBits( hbitmap, bmp->bitmap.bmHeight * bmp->bitmap.bmWidthBytes, bmp->bitmap.bmBits );
if (bmp->funcs->pPutImage == nulldrv_PutImage) return;
width_bytes = get_dib_stride( bmp->bitmap.bmWidth, bmp->bitmap.bmBitsPixel );
src.visrect.left = src.x = 0;
src.visrect.top = src.y = 0;
src.visrect.right = src.width = bmp->bitmap.bmWidth;
src.visrect.bottom = src.height = bmp->bitmap.bmHeight;
dst = src;
bits.ptr = bmp->bitmap.bmBits;
bits.is_copy = TRUE;
bits.free = free_heap_bits;
bmp->bitmap.bmBits = NULL;
/* query the color info */
info->bmiHeader.biSize = sizeof(info->bmiHeader);
info->bmiHeader.biPlanes = 1;
info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
info->bmiHeader.biCompression = BI_RGB;
info->bmiHeader.biXPelsPerMeter = 0;
info->bmiHeader.biYPelsPerMeter = 0;
info->bmiHeader.biClrUsed = 0;
info->bmiHeader.biClrImportant = 0;
info->bmiHeader.biWidth = 0;
info->bmiHeader.biHeight = 0;
info->bmiHeader.biSizeImage = 0;
err = bmp->funcs->pPutImage( NULL, hbitmap, 0, info, NULL, NULL, NULL, SRCCOPY );
if (!err || err == ERROR_BAD_FORMAT)
{
info->bmiHeader.biPlanes = 1;
info->bmiHeader.biBitCount = bmp->bitmap.bmBitsPixel;
info->bmiHeader.biWidth = bmp->bitmap.bmWidth;
info->bmiHeader.biHeight = -dst.height;
info->bmiHeader.biSizeImage = dst.height * width_bytes;
bmp->funcs->pPutImage( NULL, hbitmap, 0, info, &bits, &src, &dst, SRCCOPY );
}
if (bits.free) bits.free( &bits );
}
/***********************************************************************