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gdiplus: GdipBitmapLockBits should allow a NULL rect argument.

This commit is contained in:
Nikolay Sivov 2008-05-21 19:47:50 +04:00 committed by Alexandre Julliard
parent 87bb1cbcdc
commit 36a7f31752
2 changed files with 31 additions and 10 deletions
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22
dlls/gdiplus/image.c
View File

@ -101,16 +101,26 @@ GpStatus WINGDIPAPI GdipBitmapLockBits(GpBitmap* bitmap, GDIPCONST GpRect* rect,
BITMAPINFO bmi;
BYTE *buff = NULL;
UINT abs_height;
GpRect act_rect; /* actual rect to be used */
TRACE("%p %p %d %d %p\n", bitmap, rect, flags, format, lockeddata);
if(!lockeddata || !bitmap || !rect)
if(!lockeddata || !bitmap)
return InvalidParameter;
if(rect){
if(rect->X < 0 || rect->Y < 0 || (rect->X + rect->Width > bitmap->width) ||
(rect->Y + rect->Height > bitmap->height) || !flags)
return InvalidParameter;
act_rect = *rect;
}
else{
act_rect.X = act_rect.Y = 0;
act_rect.Width = bitmap->width;
act_rect.Height = bitmap->height;
}
if(flags & ImageLockModeUserInputBuf)
return NotImplemented;
@ -151,19 +161,19 @@ GpStatus WINGDIPAPI GdipBitmapLockBits(GpBitmap* bitmap, GDIPCONST GpRect* rect,
if(!buff)
return OutOfMemory;
lockeddata->Width = rect->Width;
lockeddata->Height = rect->Height;
lockeddata->Width = act_rect.Width;
lockeddata->Height = act_rect.Height;
lockeddata->PixelFormat = format;
lockeddata->Reserved = flags;
if(bmi.bmiHeader.biHeight > 0){
lockeddata->Stride = -stride;
lockeddata->Scan0 = buff + (bitspp / 8) * rect->X +
stride * (abs_height - 1 - rect->Y);
lockeddata->Scan0 = buff + (bitspp / 8) * act_rect.X +
stride * (abs_height - 1 - act_rect.Y);
}
else{
lockeddata->Stride = stride;
lockeddata->Scan0 = buff + (bitspp / 8) * rect->X + stride * rect->Y;
lockeddata->Scan0 = buff + (bitspp / 8) * act_rect.X + stride * act_rect.Y;
}
bitmap->lockmode = flags;

13
dlls/gdiplus/tests/image.c
View File

@ -247,7 +247,7 @@ static void test_LockBits(void)
GpBitmap *bm;
GpRect rect;
BitmapData bd;
const REAL WIDTH = 10.0, HEIGHT = 20.0;
const INT WIDTH = 10, HEIGHT = 20;
bm = NULL;
stat = GdipCreateBitmapFromScan0(WIDTH, HEIGHT, 0, PixelFormat24bppRGB, NULL, &bm);
@ -267,6 +267,17 @@ static void test_LockBits(void)
expect(Ok, stat);
}
/* read-only, with NULL rect -> whole bitmap lock */
stat = GdipBitmapLockBits(bm, NULL, ImageLockModeRead, PixelFormat24bppRGB, &bd);
expect(Ok, stat);
expect(bd.Width, WIDTH);
expect(bd.Height, HEIGHT);
if (stat == Ok) {
stat = GdipBitmapUnlockBits(bm, &bd);
expect(Ok, stat);
}
/* read-only, consecutive */
stat = GdipBitmapLockBits(bm, &rect, ImageLockModeRead, PixelFormat24bppRGB, &bd);
expect(Ok, stat);