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Unify the icon and cursor loading code for LoadImage.

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svn path=/trunk/; revision=20147
This commit is contained in:
Filip Navara 2005-12-13 19:07:08 +00:00
parent b666bbf296
commit bc49f0f151
1 changed files with 47 additions and 194 deletions
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239
reactos/lib/user32/windows/bitmap.c
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@ -72,7 +72,13 @@ LoadImageA(HINSTANCE hinst,
static HANDLE
LoadCursorImage(HINSTANCE hinst, LPCWSTR lpszName, UINT fuLoad)
LoadCursorIconImage(
HINSTANCE hinst,
LPCWSTR lpszName,
INT width,
INT height,
UINT fuLoad,
ULONG uType)
{
HANDLE hResource;
HANDLE h2Resource;
@ -84,194 +90,22 @@ LoadCursorImage(HINSTANCE hinst, LPCWSTR lpszName, UINT fuLoad)
HICON hIcon;
ULONG HeaderSize;
ULONG ColorCount;
ULONG ColorBits;
PVOID Data;
CURSORICONDIRENTRY* dirEntry;
ICONIMAGE* SafeIconImage;
GRPCURSORICONDIR* IconResDir;
INT id;
ICONIMAGE *ResIcon;
UINT ColorBits;
BOOL Icon = (uType == IMAGE_ICON);
if (!(fuLoad & LR_LOADFROMFILE))
{
if (hinst == NULL)
hinst = User32Instance;
hResource = hfRes = FindResourceW(hinst, lpszName, RT_GROUP_CURSOR);
if (hResource == NULL)
return NULL;
if (fuLoad & LR_SHARED)
{
/* FIXME - pass size! */
hIcon = NtUserFindExistingCursorIcon(hinst, (HRSRC)hfRes, 0, 0);
if (hIcon)
return hIcon;
}
hResource = LoadResource(hinst, hResource);
if (hResource == NULL)
return NULL;
IconResDir = LockResource(hResource);
if (IconResDir == NULL)
return NULL;
/*
* Find the best fitting in the IconResDir for this resolution
*/
id = LookupIconIdFromDirectoryEx((PBYTE)IconResDir, TRUE, 32, 32,
fuLoad & (LR_DEFAULTCOLOR | LR_MONOCHROME));
h2Resource = FindResourceW(hinst, MAKEINTRESOURCEW(id), MAKEINTRESOURCEW(RT_CURSOR));
hResource = LoadResource(hinst, h2Resource);
if (hResource == NULL)
return NULL;
ResIcon = LockResource(hResource);
if (ResIcon == NULL)
return NULL;
hIcon = CreateIconFromResourceEx((PBYTE)ResIcon,
SizeofResource(hinst, h2Resource),
FALSE, 0x00030000, 32, 32,
fuLoad & (LR_DEFAULTCOLOR | LR_MONOCHROME));
if (hIcon && 0 != (fuLoad & LR_SHARED))
{
NtUserSetCursorIconData((HICON)hIcon, NULL, NULL, hinst, (HRSRC)hfRes,
(HRSRC)NULL);
}
return hIcon;
}
if (fuLoad & LR_SHARED)
{
DbgPrint("FIXME: need LR_SHARED support for loading cursor images from files\n");
}
hFile = CreateFileW(lpszName, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, 0, NULL);
if (hFile == NULL)
return NULL;
hSection = CreateFileMappingW(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
CloseHandle(hFile);
if (hSection == NULL)
return NULL;
IconDIR = MapViewOfFile(hSection, FILE_MAP_READ, 0, 0, 0);
CloseHandle(hSection);
if (IconDIR == NULL)
return NULL;
if (0 != IconDIR->idReserved ||
(IMAGE_ICON != IconDIR->idType && IMAGE_CURSOR != IconDIR->idType))
{
UnmapViewOfFile(IconDIR);
return NULL;
}
/*
* Get a handle to the screen dc, the icon we create is going to be
* compatable with it.
*/
hScreenDc = CreateICW(NULL, NULL, NULL, NULL);
if (hScreenDc == NULL)
{
UnmapViewOfFile(IconDIR);
return NULL;
}
if (fuLoad & LR_MONOCHROME)
{
ColorBits = 1;
}
else
{
ColorBits = GetDeviceCaps(hScreenDc, BITSPIXEL);
/*
* FIXME:
* Remove this after proper support for alpha icons will be finished.
*/
if (ColorBits > 8)
ColorBits = 8;
}
/* Pick the best size. */
dirEntry = (CURSORICONDIRENTRY *)CURSORICON_FindBestIcon(IconDIR, 32, 32, ColorBits);
if (!dirEntry)
{
UnmapViewOfFile(IconDIR);
return NULL;
}
SafeIconImage = RtlAllocateHeap(GetProcessHeap(), 0, dirEntry->dwBytesInRes);
if (SafeIconImage == NULL)
{
UnmapViewOfFile(IconDIR);
return NULL;
}
memcpy(SafeIconImage, ((PBYTE)IconDIR) + dirEntry->dwImageOffset, dirEntry->dwBytesInRes);
UnmapViewOfFile(IconDIR);
/* At this point we have a copy of the icon image to play with. */
SafeIconImage->icHeader.biHeight = SafeIconImage->icHeader.biHeight /2;
if (SafeIconImage->icHeader.biSize == sizeof(BITMAPCOREHEADER))
{
BITMAPCOREHEADER* Core = (BITMAPCOREHEADER*)SafeIconImage;
ColorCount = (Core->bcBitCount <= 8) ? (1 << Core->bcBitCount) : 0;
HeaderSize = sizeof(BITMAPCOREHEADER) + ColorCount * sizeof(RGBTRIPLE);
}
else
{
ColorCount = SafeIconImage->icHeader.biClrUsed;
if (ColorCount == 0 && SafeIconImage->icHeader.biBitCount <= 8)
ColorCount = 1 << SafeIconImage->icHeader.biBitCount;
HeaderSize = sizeof(BITMAPINFOHEADER) + ColorCount * sizeof(RGBQUAD);
}
/* Make data point to the start of the XOR image data. */
Data = (PBYTE)SafeIconImage + HeaderSize;
hIcon = ICON_CreateCursorFromData(hScreenDc, Data, SafeIconImage, 32, 32, dirEntry->Info.cursor.wXHotspot, dirEntry->Info.cursor.wYHotspot);
DeleteDC(hScreenDc);
RtlFreeHeap(GetProcessHeap(), 0, SafeIconImage);
return hIcon;
}
static HANDLE
LoadIconImage(HINSTANCE hinst, LPCWSTR lpszName, INT width, INT height, UINT fuLoad)
{
HANDLE hResource;
HANDLE h2Resource;
HANDLE hfRes;
HANDLE hFile;
HANDLE hSection;
CURSORICONDIR *IconDIR;
HDC hScreenDc;
HICON hIcon;
ULONG HeaderSize;
ULONG ColorCount;
PVOID Data;
CURSORICONDIRENTRY* dirEntry;
ICONIMAGE* SafeIconImage;
GRPCURSORICONDIR* IconResDir;
INT id;
ICONIMAGE *ResIcon;
if (!(fuLoad & LR_LOADFROMFILE))
{
if (hinst == NULL)
hinst = User32Instance;
hResource = hfRes = FindResourceW(hinst, lpszName, RT_GROUP_ICON);
hResource = hfRes = FindResourceW(hinst, lpszName,
Icon ? RT_GROUP_ICON : RT_GROUP_CURSOR);
if (hResource == NULL)
return NULL;
@ -294,10 +128,12 @@ LoadIconImage(HINSTANCE hinst, LPCWSTR lpszName, INT width, INT height, UINT fuL
* Find the best fitting in the IconResDir for this resolution
*/
id = LookupIconIdFromDirectoryEx((PBYTE)IconResDir, TRUE, width, height,
id = LookupIconIdFromDirectoryEx((PBYTE)IconResDir, Icon, width, height,
fuLoad & (LR_DEFAULTCOLOR | LR_MONOCHROME));
h2Resource = FindResourceW(hinst, MAKEINTRESOURCEW(id), MAKEINTRESOURCEW(RT_ICON));
h2Resource = FindResourceW(hinst, MAKEINTRESOURCEW(id),
Icon ? MAKEINTRESOURCEW(RT_ICON) :
MAKEINTRESOURCEW(RT_CURSOR));
hResource = LoadResource(hinst, h2Resource);
if (hResource == NULL)
@ -309,7 +145,7 @@ LoadIconImage(HINSTANCE hinst, LPCWSTR lpszName, INT width, INT height, UINT fuL
hIcon = CreateIconFromResourceEx((PBYTE)ResIcon,
SizeofResource(hinst, h2Resource),
TRUE, 0x00030000, width, height,
Icon, 0x00030000, width, height,
fuLoad & (LR_DEFAULTCOLOR | LR_MONOCHROME));
if (hIcon && 0 != (fuLoad & LR_SHARED))
{
@ -355,10 +191,36 @@ LoadIconImage(HINSTANCE hinst, LPCWSTR lpszName, INT width, INT height, UINT fuL
return NULL;
}
/* Get a handle to the screen dc, the icon we create is going to be
* compatable with this. */
hScreenDc = CreateDCW(NULL, NULL, NULL, NULL);
if (hScreenDc == NULL)
{
UnmapViewOfFile(IconDIR);
RtlFreeHeap(GetProcessHeap(), 0, SafeIconImage);
return NULL;
}
if (fuLoad & LR_MONOCHROME)
{
ColorBits = 1;
}
else
{
ColorBits = GetDeviceCaps(hScreenDc, BITSPIXEL);
/*
* FIXME:
* Remove this after proper support for alpha icons will be finished.
*/
if (ColorBits > 8)
ColorBits = 8;
}
/* Pick the best size. */
dirEntry = (CURSORICONDIRENTRY *)CURSORICON_FindBestIcon(IconDIR, width, height, 1);
dirEntry = (CURSORICONDIRENTRY *)CURSORICON_FindBestIcon(IconDIR, width, height, ColorBits);
if (!dirEntry)
{
DeleteDC(hScreenDc);
UnmapViewOfFile(IconDIR);
return NULL;
}
@ -366,6 +228,7 @@ LoadIconImage(HINSTANCE hinst, LPCWSTR lpszName, INT width, INT height, UINT fuL
SafeIconImage = RtlAllocateHeap(GetProcessHeap(), 0, dirEntry->dwBytesInRes);
if (SafeIconImage == NULL)
{
DeleteDC(hScreenDc);
UnmapViewOfFile(IconDIR);
return NULL;
}
@ -394,16 +257,6 @@ LoadIconImage(HINSTANCE hinst, LPCWSTR lpszName, INT width, INT height, UINT fuL
/* Make data point to the start of the XOR image data. */
Data = (PBYTE)SafeIconImage + HeaderSize;
/* Get a handle to the screen dc, the icon we create is going to be
* compatable with this. */
hScreenDc = CreateICW(NULL, NULL, NULL, NULL);
if (hScreenDc == NULL)
{
if (fuLoad & LR_LOADFROMFILE)
RtlFreeHeap(GetProcessHeap(), 0, SafeIconImage);
return NULL;
}
hIcon = ICON_CreateIconFromData(hScreenDc, Data, SafeIconImage, width, height, width/2, height/2);
RtlFreeHeap(GetProcessHeap(), 0, SafeIconImage);
DeleteDC(hScreenDc);
@ -552,9 +405,9 @@ LoadImageW(
case IMAGE_BITMAP:
return LoadBitmapImage(hinst, lpszName, fuLoad);
case IMAGE_CURSOR:
return LoadCursorImage(hinst, lpszName, fuLoad);
case IMAGE_ICON:
return LoadIconImage(hinst, lpszName, cxDesired, cyDesired, fuLoad);
return LoadCursorIconImage(hinst, lpszName, cxDesired, cyDesired,
fuLoad, uType);
default:
break;
}