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User32 bitmap.c:

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- Patch by Michael Kaufmann
  - CopyImage: Handle the flags LR_COPYDELETEORG, LR_CREATEDIBSECTION, and LR_MONOCHROME.

svn path=/trunk/; revision=23906
This commit is contained in:
James Tabor 2006-09-04 03:08:18 +00:00
parent 76b17ae494
commit ab4e2c9cf4
1 changed files with 195 additions and 26 deletions
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221
reactos/dll/win32/user32/windows/bitmap.c
View file

@ -562,36 +562,200 @@ CopyImage(
IN INT desiredy, IN INT desiredy,
IN UINT flags) IN UINT flags)
{ {
HBITMAP res; /*
BITMAP bm; * BUGS
* Only Windows NT 4.0 supports the LR_COPYRETURNORG flag for bitmaps,
* all other versions (95/2000/XP have been tested) ignore it.
*
* NOTES
* If LR_CREATEDIBSECTION is absent, the copy will be monochrome for
* a monochrome source bitmap or if LR_MONOCHROME is present, otherwise
* the copy will have the same depth as the screen.
* The content of the image will only be copied if the bit depth of the
* original image is compatible with the bit depth of the screen, or
* if the source is a DIB section.
* The LR_MONOCHROME flag is ignored if LR_CREATEDIBSECTION is present.
*/
switch (type) switch (type)
{ {
case IMAGE_BITMAP: case IMAGE_BITMAP:
{ {
DPRINT("WARNING: Incomplete implementation of CopyImage!\n"); HBITMAP res = NULL;
/* DIBSECTION ds;
* FIXME: Support flags LR_COPYDELETEORG, LR_COPYFROMRESOURCE, int objSize;
* LR_COPYRETURNORG, LR_CREATEDIBSECTION and LR_MONOCHROME. BITMAPINFO * bi;
*/
if (!GetObjectW(hnd, sizeof(bm), &bm))
return NULL;
bm.bmBits = NULL;
if ((res = CreateBitmapIndirect(&bm)))
{
char *buf = HeapAlloc(GetProcessHeap(), 0, bm.bmWidthBytes * bm.bmHeight);
if (buf == NULL)
{
DeleteObject(res);
return NULL;
}
GetBitmapBits(hnd, bm.bmWidthBytes * bm.bmHeight, buf);
SetBitmapBits(res, bm.bmWidthBytes * bm.bmHeight, buf);
HeapFree(GetProcessHeap(), 0, buf);
}
return res;
}
objSize = GetObjectW( hnd, sizeof(ds), &ds );
if (!objSize) return 0;
if ((desiredx < 0) || (desiredy < 0)) return 0;
if (flags & LR_COPYFROMRESOURCE)
{
DPRINT1("FIXME: The flag LR_COPYFROMRESOURCE is not implemented for bitmaps\n");
}
if (desiredx == 0) desiredx = ds.dsBm.bmWidth;
if (desiredy == 0) desiredy = ds.dsBm.bmHeight;
/* Allocate memory for a BITMAPINFOHEADER structure and a
color table. The maximum number of colors in a color table
is 256 which corresponds to a bitmap with depth 8.
Bitmaps with higher depths don't have color tables. */
bi = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
if (!bi) return 0;
bi->bmiHeader.biSize = sizeof(bi->bmiHeader);
bi->bmiHeader.biPlanes = ds.dsBm.bmPlanes;
bi->bmiHeader.biBitCount = ds.dsBm.bmBitsPixel;
bi->bmiHeader.biCompression = BI_RGB;
if (flags & LR_CREATEDIBSECTION)
{
/* Create a DIB section. LR_MONOCHROME is ignored */
void * bits;
HDC dc = CreateCompatibleDC(NULL);
if (objSize == sizeof(DIBSECTION))
{
/* The source bitmap is a DIB.
Get its attributes to create an exact copy */
memcpy(bi, &ds.dsBmih, sizeof(BITMAPINFOHEADER));
}
/* Get the color table or the color masks */
GetDIBits(dc, hnd, 0, ds.dsBm.bmHeight, NULL, bi, DIB_RGB_COLORS);
bi->bmiHeader.biWidth = desiredx;
bi->bmiHeader.biHeight = desiredy;
bi->bmiHeader.biSizeImage = 0;
res = CreateDIBSection(dc, bi, DIB_RGB_COLORS, &bits, NULL, 0);
DeleteDC(dc);
}
else
{
/* Create a device-dependent bitmap */
BOOL monochrome = (flags & LR_MONOCHROME);
if (objSize == sizeof(DIBSECTION))
{
/* The source bitmap is a DIB section.
Get its attributes */
HDC dc = CreateCompatibleDC(NULL);
bi->bmiHeader.biSize = sizeof(bi->bmiHeader);
bi->bmiHeader.biBitCount = ds.dsBm.bmBitsPixel;
GetDIBits(dc, hnd, 0, ds.dsBm.bmHeight, NULL, bi, DIB_RGB_COLORS);
DeleteDC(dc);
if (!monochrome && ds.dsBm.bmBitsPixel == 1)
{
/* Look if the colors of the DIB are black and white */
monochrome =
(bi->bmiColors[0].rgbRed == 0xff
&& bi->bmiColors[0].rgbGreen == 0xff
&& bi->bmiColors[0].rgbBlue == 0xff
&& bi->bmiColors[0].rgbReserved == 0
&& bi->bmiColors[1].rgbRed == 0
&& bi->bmiColors[1].rgbGreen == 0
&& bi->bmiColors[1].rgbBlue == 0
&& bi->bmiColors[1].rgbReserved == 0)
||
(bi->bmiColors[0].rgbRed == 0
&& bi->bmiColors[0].rgbGreen == 0
&& bi->bmiColors[0].rgbBlue == 0
&& bi->bmiColors[0].rgbReserved == 0
&& bi->bmiColors[1].rgbRed == 0xff
&& bi->bmiColors[1].rgbGreen == 0xff
&& bi->bmiColors[1].rgbBlue == 0xff
&& bi->bmiColors[1].rgbReserved == 0);
}
}
else if (!monochrome)
{
monochrome = ds.dsBm.bmBitsPixel == 1;
}
if (monochrome)
{
res = CreateBitmap(desiredx, desiredy, 1, 1, NULL);
}
else
{
HDC screenDC = GetDC(NULL);
res = CreateCompatibleBitmap(screenDC, desiredx, desiredy);
ReleaseDC(NULL, screenDC);
}
}
if (res)
{
/* Only copy the bitmap if it's a DIB section or if it's
compatible to the screen */
BOOL copyContents;
if (objSize == sizeof(DIBSECTION))
{
copyContents = TRUE;
}
else
{
HDC screenDC = GetDC(NULL);
int screen_depth = GetDeviceCaps(screenDC, BITSPIXEL);
ReleaseDC(NULL, screenDC);
copyContents = (ds.dsBm.bmBitsPixel == 1 || ds.dsBm.bmBitsPixel == screen_depth);
}
if (copyContents)
{
/* The source bitmap may already be selected in a device context,
use GetDIBits/StretchDIBits and not StretchBlt */
HDC dc;
void * bits;
dc = CreateCompatibleDC(NULL);
bi->bmiHeader.biWidth = ds.dsBm.bmWidth;
bi->bmiHeader.biHeight = ds.dsBm.bmHeight;
bi->bmiHeader.biSizeImage = 0;
bi->bmiHeader.biClrUsed = 0;
bi->bmiHeader.biClrImportant = 0;
/* Fill in biSizeImage */
GetDIBits(dc, hnd, 0, ds.dsBm.bmHeight, NULL, bi, DIB_RGB_COLORS);
bits = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, bi->bmiHeader.biSizeImage);
if (bits)
{
HBITMAP oldBmp;
/* Get the image bits of the source bitmap */
GetDIBits(dc, hnd, 0, ds.dsBm.bmHeight, bits, bi, DIB_RGB_COLORS);
/* Copy it to the destination bitmap */
oldBmp = SelectObject(dc, res);
StretchDIBits(dc, 0, 0, desiredx, desiredy,
0, 0, ds.dsBm.bmWidth, ds.dsBm.bmHeight,
bits, bi, DIB_RGB_COLORS, SRCCOPY);
SelectObject(dc, oldBmp);
HeapFree(GetProcessHeap(), 0, bits);
}
DeleteDC(dc);
}
if (flags & LR_COPYDELETEORG)
{
DeleteObject(hnd);
}
}
HeapFree(GetProcessHeap(), 0, bi);
return (HICON)res;
}
case IMAGE_ICON: case IMAGE_ICON:
{ {
static BOOL IconMsgDisplayed = FALSE; static BOOL IconMsgDisplayed = FALSE;
@ -602,6 +766,7 @@ CopyImage(
IconMsgDisplayed = TRUE; IconMsgDisplayed = TRUE;
} }
return CopyIcon(hnd); return CopyIcon(hnd);
// return CURSORICON_ExtCopy(hnd,type, desiredx, desiredy, flags);
} }
case IMAGE_CURSOR: case IMAGE_CURSOR:
@ -613,9 +778,13 @@ CopyImage(
DPRINT("FIXME: CopyImage doesn't support IMAGE_CURSOR correctly!\n"); DPRINT("FIXME: CopyImage doesn't support IMAGE_CURSOR correctly!\n");
IconMsgDisplayed = TRUE; IconMsgDisplayed = TRUE;
} }
/* Should call CURSORICON_ExtCopy but more testing
* needs to be done before we change this
*/
if (flags) DPRINT1("FIXME: Flags are ignored\n");
return CopyCursor(hnd); return CopyCursor(hnd);
} }
} }
return NULL; return NULL;
} }