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gdiplus: Avoid recursively locking image in GdipImageRotateFlip.

Browse source 
GdipImageRotateFlip() calls GdipBitmapLockBits() while holding the image
lock, resulting in a recursive lock.

Since GdipImageRotateFlip() uses GdipBitmapLockBits() only to obtain
Scan0 and Stride, replace them with equivalent fields from GpBitmap
itself.
This commit is contained in:
Jinoh Kang 2022-10-22 20:38:47 +09:00 committed by Alexandre Julliard
parent 8e73b48f34
commit d6b4321125
1 changed files with 9 additions and 22 deletions
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33
dlls/gdiplus/image.c
View file

@ -5530,7 +5530,7 @@ GpStatus WINGDIPAPI GdipImageRotateFlip(GpImage *image, RotateFlipType type)
int src_x_offset, src_y_offset; int src_x_offset, src_y_offset;
LPBYTE src_origin; LPBYTE src_origin;
UINT x, y, width, height; UINT x, y, width, height;
BitmapData src_lock, dst_lock; BitmapData dst_lock;
GpStatus stat; GpStatus stat;
BOOL unlock; BOOL unlock;
@ -5577,14 +5577,6 @@ GpStatus WINGDIPAPI GdipImageRotateFlip(GpImage *image, RotateFlipType type)
stat = GdipCreateBitmapFromScan0(width, height, 0, bitmap->format, NULL, &new_bitmap); stat = GdipCreateBitmapFromScan0(width, height, 0, bitmap->format, NULL, &new_bitmap);
if (stat != Ok)
{
image_unlock(image, unlock);
return stat;
}
stat = GdipBitmapLockBits(bitmap, NULL, ImageLockModeRead, bitmap->format, &src_lock);
if (stat == Ok) if (stat == Ok)
{ {
stat = GdipBitmapLockBits(new_bitmap, NULL, ImageLockModeWrite, bitmap->format, &dst_lock); stat = GdipBitmapLockBits(new_bitmap, NULL, ImageLockModeWrite, bitmap->format, &dst_lock);
@ -5594,14 +5586,14 @@ GpStatus WINGDIPAPI GdipImageRotateFlip(GpImage *image, RotateFlipType type)
LPBYTE src_row, src_pixel; LPBYTE src_row, src_pixel;
LPBYTE dst_row, dst_pixel; LPBYTE dst_row, dst_pixel;
src_origin = src_lock.Scan0; src_origin = bitmap->bits;
if (flip_x) src_origin += bytesperpixel * (bitmap->width - 1); if (flip_x) src_origin += bytesperpixel * (bitmap->width - 1);
if (flip_y) src_origin += src_lock.Stride * (bitmap->height - 1); if (flip_y) src_origin += bitmap->stride * (bitmap->height - 1);
if (rotate_90) if (rotate_90)
{ {
if (flip_y) src_x_offset = -src_lock.Stride; if (flip_y) src_x_offset = -bitmap->stride;
else src_x_offset = src_lock.Stride; else src_x_offset = bitmap->stride;
if (flip_x) src_y_offset = -bytesperpixel; if (flip_x) src_y_offset = -bytesperpixel;
else src_y_offset = bytesperpixel; else src_y_offset = bytesperpixel;
} }
@ -5609,8 +5601,8 @@ GpStatus WINGDIPAPI GdipImageRotateFlip(GpImage *image, RotateFlipType type)
{ {
if (flip_x) src_x_offset = -bytesperpixel; if (flip_x) src_x_offset = -bytesperpixel;
else src_x_offset = bytesperpixel; else src_x_offset = bytesperpixel;
if (flip_y) src_y_offset = -src_lock.Stride; if (flip_y) src_y_offset = -bitmap->stride;
else src_y_offset = src_lock.Stride; else src_y_offset = bitmap->stride;
} }
src_row = src_origin; src_row = src_origin;
@ -5631,15 +5623,10 @@ GpStatus WINGDIPAPI GdipImageRotateFlip(GpImage *image, RotateFlipType type)
} }
GdipBitmapUnlockBits(new_bitmap, &dst_lock); GdipBitmapUnlockBits(new_bitmap, &dst_lock);
}
GdipBitmapUnlockBits(bitmap, &src_lock);
}
if (stat == Ok)
move_bitmap(bitmap, new_bitmap, FALSE); move_bitmap(bitmap, new_bitmap, FALSE);
else }
GdipDisposeImage(&new_bitmap->image); else GdipDisposeImage(&new_bitmap->image);
}
image_unlock(image, unlock); image_unlock(image, unlock);
return stat; return stat;