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handle zero width/height for BitBlt and StretchBlt

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Vincent Wei
2021-05-03 19:31:46 +08:00
parent f8e144d1f2
commit 5978175ef8
1 changed files with 10 additions and 0 deletions
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10
src/newgdi/bitmap.c
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@@ -1112,6 +1112,8 @@ void GUIAPI BitBlt (HDC hsdc, int sx, int sy, int sw, int sh,
sw += sx; sh += sy;
coor_LP2SP (psdc, &sx, &sy);
coor_LP2SP (psdc, &sw, &sh);
if (sw == sx) sw = sx + RECTW (psdc->DevRC);
if (sh == sy) sh = sy + RECTH (psdc->DevRC);
SetRect (&srcOutput, sx, sy, sw, sh);
NormalizeRect (&srcOutput);
sx = srcOutput.left; sy = srcOutput.top;
@@ -1383,6 +1385,8 @@ void GUIAPI StretchBltLegacy (HDC hsdc, int sx, int sy, int sw, int sh,
sw += sx; sh += sy;
coor_LP2SP(psdc, &sx, &sy);
coor_LP2SP(psdc, &sw, &sh);
if (sw == sx) sw = sx + RECTW (psdc->DevRC);
if (sh == sy) sh = sy + RECTH (psdc->DevRC);
SetRect (&srcOutput, sx, sy, sw, sh);
NormalizeRect (&srcOutput);
sx = srcOutput.left; sy = srcOutput.top;
@@ -1391,6 +1395,8 @@ void GUIAPI StretchBltLegacy (HDC hsdc, int sx, int sy, int sw, int sh,
dw += dx; dh += dy;
coor_LP2SP (pddc, &dx, &dy);
coor_LP2SP (pddc, &dw, &dh);
if (dw == dx) dw = dx + RECTW (pddc->DevRC);
if (dh == dy) dh = dy + RECTH (pddc->DevRC);
SetRect (&dstOutput, dx, dy, dw, dh);
NormalizeRect (&dstOutput);
dx = dstOutput.left; dy = dstOutput.top;
@@ -1491,6 +1497,8 @@ void GUIAPI StretchBlt (HDC hsdc, int sx, int sy, int sw, int sh,
sw += sx; sh += sy;
coor_LP2SP(psdc, &sx, &sy);
coor_LP2SP(psdc, &sw, &sh);
if (sw == sx) sw = sx + RECTW (psdc->DevRC);
if (sh == sy) sh = sy + RECTH (psdc->DevRC);
SetRect (&srcOutput, sx, sy, sw, sh);
NormalizeRect (&srcOutput);
sx = srcOutput.left; sy = srcOutput.top;
@@ -1499,6 +1507,8 @@ void GUIAPI StretchBlt (HDC hsdc, int sx, int sy, int sw, int sh,
dw += dx; dh += dy;
coor_LP2SP (pddc, &dx, &dy);
coor_LP2SP (pddc, &dw, &dh);
if (dw == dx) dw = dx + RECTW (pddc->DevRC);
if (dh == dy) dh = dy + RECTH (pddc->DevRC);
SetRect (&dstOutput, dx, dy, dw, dh);
NormalizeRect (&dstOutput);
dx = dstOutput.left; dy = dstOutput.top;