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wine/dlls/user32/cursoricon.c
Jacek Caban 0b87623819 user.exe: Use win32u directly for cursor icon handle support. 
Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2022-03-21 16:12:07 +01:00

2551 lines
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/*
* Cursor and icon support
*
* Copyright 1995 Alexandre Julliard
* Copyright 1996 Martin Von Loewis
* Copyright 1997 Alex Korobka
* Copyright 1998 Turchanov Sergey
* Copyright 2007 Henri Verbeet
* Copyright 2009 Vincent Povirk for CodeWeavers
* Copyright 2016 Dmitry Timoshkov
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <png.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winerror.h"
#include "winnls.h"
#include "wine/exception.h"
#include "wine/server.h"
#include "controls.h"
#include "win.h"
#include "user_private.h"
#include "wine/list.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(cursor);
WINE_DECLARE_DEBUG_CHANNEL(icon);
WINE_DECLARE_DEBUG_CHANNEL(resource);
#define RIFF_FOURCC( c0, c1, c2, c3 ) \
( (DWORD)(BYTE)(c0) | ( (DWORD)(BYTE)(c1) << 8 ) | \
( (DWORD)(BYTE)(c2) << 16 ) | ( (DWORD)(BYTE)(c3) << 24 ) )
#define PNG_SIGN RIFF_FOURCC(0x89,'P','N','G')
/**********************************************************************
* User objects management
*/
static HBITMAP create_color_bitmap( int width, int height )
{
HDC hdc = get_display_dc();
HBITMAP ret = CreateCompatibleBitmap( hdc, width, height );
release_display_dc( hdc );
return ret;
}
static int get_display_bpp(void)
{
HDC hdc = get_display_dc();
int ret = GetDeviceCaps( hdc, BITSPIXEL );
release_display_dc( hdc );
return ret;
}
static void free_icon_frame( struct cursoricon_frame *frame )
{
if (frame->color) DeleteObject( frame->color );
if (frame->alpha) DeleteObject( frame->alpha );
if (frame->mask) DeleteObject( frame->mask );
}
/***********************************************************************
* map_fileW
*
* Helper function to map a file to memory:
* name - file name
* [RETURN] ptr - pointer to mapped file
* [RETURN] filesize - pointer size of file to be stored if not NULL
*/
static const void *map_fileW( LPCWSTR name, LPDWORD filesize )
{
HANDLE hFile, hMapping;
LPVOID ptr = NULL;
hFile = CreateFileW( name, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, 0 );
if (hFile != INVALID_HANDLE_VALUE)
{
hMapping = CreateFileMappingW( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
if (hMapping)
{
ptr = MapViewOfFile( hMapping, FILE_MAP_READ, 0, 0, 0 );
CloseHandle( hMapping );
if (filesize)
*filesize = GetFileSize( hFile, NULL );
}
CloseHandle( hFile );
}
return ptr;
}
/***********************************************************************
* get_dib_image_size
*
* Return the size of a DIB bitmap in bytes.
*/
static int get_dib_image_size( int width, int height, int depth )
{
return (((width * depth + 31) / 8) & ~3) * abs( height );
}
/***********************************************************************
* bitmap_info_size
*
* Return the size of the bitmap info structure including color table.
*/
int bitmap_info_size( const BITMAPINFO * info, WORD coloruse )
{
unsigned int colors, size, masks = 0;
if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
{
const BITMAPCOREHEADER *core = (const BITMAPCOREHEADER *)info;
colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
return sizeof(BITMAPCOREHEADER) + colors *
((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
}
else /* assume BITMAPINFOHEADER */
{
colors = info->bmiHeader.biClrUsed;
if (colors > 256) /* buffer overflow otherwise */
colors = 256;
if (!colors && (info->bmiHeader.biBitCount <= 8))
colors = 1 << info->bmiHeader.biBitCount;
if (info->bmiHeader.biCompression == BI_BITFIELDS) masks = 3;
size = max( info->bmiHeader.biSize, sizeof(BITMAPINFOHEADER) + masks * sizeof(DWORD) );
return size + colors * ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
}
}
/***********************************************************************
* is_dib_monochrome
*
* Returns whether a DIB can be converted to a monochrome DDB.
*
* A DIB can be converted if its color table contains only black and
* white. Black must be the first color in the color table.
*
* Note : If the first color in the color table is white followed by
* black, we can't convert it to a monochrome DDB with
* SetDIBits, because black and white would be inverted.
*/
static BOOL is_dib_monochrome( const BITMAPINFO* info )
{
if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
{
const RGBTRIPLE *rgb = ((const BITMAPCOREINFO*)info)->bmciColors;
if (((const BITMAPCOREINFO*)info)->bmciHeader.bcBitCount != 1) return FALSE;
/* Check if the first color is black */
if ((rgb->rgbtRed == 0) && (rgb->rgbtGreen == 0) && (rgb->rgbtBlue == 0))
{
rgb++;
/* Check if the second color is white */
return ((rgb->rgbtRed == 0xff) && (rgb->rgbtGreen == 0xff)
&& (rgb->rgbtBlue == 0xff));
}
else return FALSE;
}
else /* assume BITMAPINFOHEADER */
{
const RGBQUAD *rgb = info->bmiColors;
if (info->bmiHeader.biBitCount != 1) return FALSE;
/* Check if the first color is black */
if ((rgb->rgbRed == 0) && (rgb->rgbGreen == 0) &&
(rgb->rgbBlue == 0) && (rgb->rgbReserved == 0))
{
rgb++;
/* Check if the second color is white */
return ((rgb->rgbRed == 0xff) && (rgb->rgbGreen == 0xff)
&& (rgb->rgbBlue == 0xff) && (rgb->rgbReserved == 0));
}
else return FALSE;
}
}
/***********************************************************************
* DIB_GetBitmapInfo
*
* Get the info from a bitmap header.
* Return 1 for INFOHEADER, 0 for COREHEADER, -1 in case of failure.
*/
static int DIB_GetBitmapInfo( const BITMAPINFOHEADER *header, LONG *width,
LONG *height, WORD *bpp, DWORD *compr )
{
if (header->biSize == sizeof(BITMAPCOREHEADER))
{
const BITMAPCOREHEADER *core = (const BITMAPCOREHEADER *)header;
*width = core->bcWidth;
*height = core->bcHeight;
*bpp = core->bcBitCount;
*compr = 0;
return 0;
}
else if (header->biSize == sizeof(BITMAPINFOHEADER) ||
header->biSize == sizeof(BITMAPV4HEADER) ||
header->biSize == sizeof(BITMAPV5HEADER))
{
*width = header->biWidth;
*height = header->biHeight;
*bpp = header->biBitCount;
*compr = header->biCompression;
return 1;
}
WARN("unknown/wrong size (%u) for header\n", header->biSize);
return -1;
}
/**********************************************************************
* get_icon_size
*/
BOOL get_icon_size( HICON handle, SIZE *size )
{
BOOL ret = NtUserGetIconSize( handle, 0, &size->cx, &size->cy );
if (ret) size->cy /= 2;
return ret;
}
struct png_wrapper
{
const char *buffer;
size_t size, pos;
};
static void user_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
struct png_wrapper *png = png_get_io_ptr(png_ptr);
if (png->size - png->pos >= length)
{
memcpy(data, png->buffer + png->pos, length);
png->pos += length;
}
else
{
png_error(png_ptr, "failed to read PNG data");
}
}
static unsigned be_uint(unsigned val)
{
union
{
unsigned val;
unsigned char c[4];
} u;
u.val = val;
return (u.c[0] << 24) | (u.c[1] << 16) | (u.c[2] << 8) | u.c[3];
}
static BOOL get_png_info(const void *png_data, DWORD size, int *width, int *height, int *bpp)
{
static const char png_sig[8] = { 0x89,'P','N','G',0x0d,0x0a,0x1a,0x0a };
static const char png_IHDR[8] = { 0,0,0,0x0d,'I','H','D','R' };
const struct
{
char png_sig[8];
char ihdr_sig[8];
unsigned width, height;
char bit_depth, color_type, compression, filter, interlace;
} *png = png_data;
if (size < sizeof(*png)) return FALSE;
if (memcmp(png->png_sig, png_sig, sizeof(png_sig)) != 0) return FALSE;
if (memcmp(png->ihdr_sig, png_IHDR, sizeof(png_IHDR)) != 0) return FALSE;
*bpp = (png->color_type == PNG_COLOR_TYPE_RGB_ALPHA) ? 32 : 24;
*width = be_uint(png->width);
*height = be_uint(png->height);
return TRUE;
}
static BITMAPINFO *load_png(const char *png_data, DWORD *size)
{
struct png_wrapper png;
png_structp png_ptr;
png_infop info_ptr;
png_bytep *row_pointers = NULL;
int color_type, bit_depth, bpp, width, height;
int rowbytes, image_size, mask_size = 0, i;
BITMAPINFO *info = NULL;
unsigned char *image_data;
if (!get_png_info(png_data, *size, &width, &height, &bpp)) return NULL;
png.buffer = png_data;
png.size = *size;
png.pos = 0;
/* initialize libpng */
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr) return NULL;
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_read_struct(&png_ptr, NULL, NULL);
return NULL;
}
/* set up setjmp/longjmp error handling */
if (setjmp(png_jmpbuf(png_ptr)))
{
free(row_pointers);
RtlFreeHeap(GetProcessHeap(), 0, info);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return NULL;
}
png_set_crc_action(png_ptr, PNG_CRC_QUIET_USE, PNG_CRC_QUIET_USE);
/* set up custom i/o handling */
png_set_read_fn(png_ptr, &png, user_read_data);
/* read the header */
png_read_info(png_ptr, info_ptr);
color_type = png_get_color_type(png_ptr, info_ptr);
bit_depth = png_get_bit_depth(png_ptr, info_ptr);
/* expand grayscale image data to rgb */
if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb(png_ptr);
/* expand palette image data to rgb */
if (color_type == PNG_COLOR_TYPE_PALETTE || bit_depth < 8)
png_set_expand(png_ptr);
/* update color type information */
png_read_update_info(png_ptr, info_ptr);
color_type = png_get_color_type(png_ptr, info_ptr);
bit_depth = png_get_bit_depth(png_ptr, info_ptr);
bpp = 0;
switch (color_type)
{
case PNG_COLOR_TYPE_RGB:
if (bit_depth == 8)
bpp = 24;
break;
case PNG_COLOR_TYPE_RGB_ALPHA:
if (bit_depth == 8)
{
png_set_bgr(png_ptr);
bpp = 32;
}
break;
default:
break;
}
if (!bpp)
{
FIXME("unsupported PNG color format %d, %d bpp\n", color_type, bit_depth);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return NULL;
}
width = png_get_image_width(png_ptr, info_ptr);
height = png_get_image_height(png_ptr, info_ptr);
rowbytes = (width * bpp + 7) / 8;
image_size = height * rowbytes;
if (bpp != 32) /* add a mask if there is no alpha */
mask_size = (width + 7) / 8 * height;
info = RtlAllocateHeap(GetProcessHeap(), 0, sizeof(BITMAPINFOHEADER) + image_size + mask_size);
if (!info)
{
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return NULL;
}
image_data = (unsigned char *)info + sizeof(BITMAPINFOHEADER);
memset(image_data + image_size, 0, mask_size);
row_pointers = malloc(height * sizeof(png_bytep));
if (!row_pointers)
{
RtlFreeHeap(GetProcessHeap(), 0, info);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return NULL;
}
/* upside down */
for (i = 0; i < height; i++)
row_pointers[i] = image_data + (height - i - 1) * rowbytes;
png_read_image(png_ptr, row_pointers);
free(row_pointers);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
info->bmiHeader.biWidth = width;
info->bmiHeader.biHeight = height * 2;
info->bmiHeader.biPlanes = 1;
info->bmiHeader.biBitCount = bpp;
info->bmiHeader.biCompression = BI_RGB;
info->bmiHeader.biSizeImage = image_size;
info->bmiHeader.biXPelsPerMeter = 0;
info->bmiHeader.biYPelsPerMeter = 0;
info->bmiHeader.biClrUsed = 0;
info->bmiHeader.biClrImportant = 0;
*size = sizeof(BITMAPINFOHEADER) + image_size + mask_size;
return info;
}
/*
* The following macro functions account for the irregularities of
* accessing cursor and icon resources in files and resource entries.
*/
typedef BOOL (*fnGetCIEntry)( LPCVOID dir, DWORD size, int n,
int *width, int *height, int *bits );
/**********************************************************************
* CURSORICON_FindBestIcon
*
* Find the icon closest to the requested size and bit depth.
*/
static int CURSORICON_FindBestIcon( LPCVOID dir, DWORD size, fnGetCIEntry get_entry,
int width, int height, int depth, UINT loadflags )
{
int i, cx, cy, bits, bestEntry = -1;
UINT iTotalDiff, iXDiff=0, iYDiff=0, iColorDiff;
UINT iTempXDiff, iTempYDiff, iTempColorDiff;
/* Find Best Fit */
iTotalDiff = 0xFFFFFFFF;
iColorDiff = 0xFFFFFFFF;
if (loadflags & LR_DEFAULTSIZE)
{
if (!width) width = GetSystemMetrics( SM_CXICON );
if (!height) height = GetSystemMetrics( SM_CYICON );
}
else if (!width && !height)
{
/* use the size of the first entry */
if (!get_entry( dir, size, 0, &width, &height, &bits )) return -1;
iTotalDiff = 0;
}
for ( i = 0; iTotalDiff && get_entry( dir, size, i, &cx, &cy, &bits ); i++ )
{
iTempXDiff = abs(width - cx);
iTempYDiff = abs(height - cy);
if(iTotalDiff > (iTempXDiff + iTempYDiff))
{
iXDiff = iTempXDiff;
iYDiff = iTempYDiff;
iTotalDiff = iXDiff + iYDiff;
}
}
/* Find Best Colors for Best Fit */
for ( i = 0; get_entry( dir, size, i, &cx, &cy, &bits ); i++ )
{
TRACE("entry %d: %d x %d, %d bpp\n", i, cx, cy, bits);
if(abs(width - cx) == iXDiff && abs(height - cy) == iYDiff)
{
iTempColorDiff = abs(depth - bits);
if(iColorDiff > iTempColorDiff)
{
bestEntry = i;
iColorDiff = iTempColorDiff;
}
}
}
return bestEntry;
}
static BOOL CURSORICON_GetResIconEntry( LPCVOID dir, DWORD size, int n,
int *width, int *height, int *bits )
{
const CURSORICONDIR *resdir = dir;
const ICONRESDIR *icon;
if ( resdir->idCount <= n )
return FALSE;
if ((const char *)&resdir->idEntries[n + 1] - (const char *)dir > size)
return FALSE;
icon = &resdir->idEntries[n].ResInfo.icon;
*width = icon->bWidth;
*height = icon->bHeight;
*bits = resdir->idEntries[n].wBitCount;
if (!*width && !*height) *width = *height = 256;
return TRUE;
}
/**********************************************************************
* CURSORICON_FindBestCursor
*
* Find the cursor closest to the requested size.
*
* FIXME: parameter 'color' ignored.
*/
static int CURSORICON_FindBestCursor( LPCVOID dir, DWORD size, fnGetCIEntry get_entry,
int width, int height, int depth, UINT loadflags )
{
int i, maxwidth, maxheight, maxbits, cx, cy, bits, bestEntry = -1;
if (loadflags & LR_DEFAULTSIZE)
{
if (!width) width = GetSystemMetrics( SM_CXCURSOR );
if (!height) height = GetSystemMetrics( SM_CYCURSOR );
}
else if (!width && !height)
{
/* use the first entry */
if (!get_entry( dir, size, 0, &width, &height, &bits )) return -1;
return 0;
}
/* First find the largest one smaller than or equal to the requested size*/
maxwidth = maxheight = maxbits = 0;
for ( i = 0; get_entry( dir, size, i, &cx, &cy, &bits ); i++ )
{
if (cx > width || cy > height) continue;
if (cx < maxwidth || cy < maxheight) continue;
if (cx == maxwidth && cy == maxheight)
{
if (loadflags & LR_MONOCHROME)
{
if (maxbits && bits >= maxbits) continue;
}
else if (bits <= maxbits) continue;
}
bestEntry = i;
maxwidth = cx;
maxheight = cy;
maxbits = bits;
}
if (bestEntry != -1) return bestEntry;
/* Now find the smallest one larger than the requested size */
maxwidth = maxheight = 255;
for ( i = 0; get_entry( dir, size, i, &cx, &cy, &bits ); i++ )
{
if (cx > maxwidth || cy > maxheight) continue;
if (cx == maxwidth && cy == maxheight)
{
if (loadflags & LR_MONOCHROME)
{
if (maxbits && bits >= maxbits) continue;
}
else if (bits <= maxbits) continue;
}
bestEntry = i;
maxwidth = cx;
maxheight = cy;
maxbits = bits;
}
if (bestEntry == -1) bestEntry = 0;
return bestEntry;
}
static BOOL CURSORICON_GetResCursorEntry( LPCVOID dir, DWORD size, int n,
int *width, int *height, int *bits )
{
const CURSORICONDIR *resdir = dir;
const CURSORDIR *cursor;
if ( resdir->idCount <= n )
return FALSE;
if ((const char *)&resdir->idEntries[n + 1] - (const char *)dir > size)
return FALSE;
cursor = &resdir->idEntries[n].ResInfo.cursor;
*width = cursor->wWidth;
*height = cursor->wHeight;
*bits = resdir->idEntries[n].wBitCount;
if (*height == *width * 2) *height /= 2;
return TRUE;
}
static const CURSORICONDIRENTRY *CURSORICON_FindBestIconRes( const CURSORICONDIR * dir, DWORD size,
int width, int height, int depth,
UINT loadflags )
{
int n;
n = CURSORICON_FindBestIcon( dir, size, CURSORICON_GetResIconEntry,
width, height, depth, loadflags );
if ( n < 0 )
return NULL;
return &dir->idEntries[n];
}
static const CURSORICONDIRENTRY *CURSORICON_FindBestCursorRes( const CURSORICONDIR *dir, DWORD size,
int width, int height, int depth,
UINT loadflags )
{
int n = CURSORICON_FindBestCursor( dir, size, CURSORICON_GetResCursorEntry,
width, height, depth, loadflags );
if ( n < 0 )
return NULL;
return &dir->idEntries[n];
}
static BOOL CURSORICON_GetFileEntry( LPCVOID dir, DWORD size, int n,
int *width, int *height, int *bits )
{
const CURSORICONFILEDIR *filedir = dir;
const CURSORICONFILEDIRENTRY *entry;
const BITMAPINFOHEADER *info;
if ( filedir->idCount <= n )
return FALSE;
if ((const char *)&filedir->idEntries[n + 1] - (const char *)dir > size)
return FALSE;
entry = &filedir->idEntries[n];
if (entry->dwDIBOffset > size - sizeof(info->biSize)) return FALSE;
info = (const BITMAPINFOHEADER *)((const char *)dir + entry->dwDIBOffset);
if (info->biSize == PNG_SIGN) return get_png_info(info, size, width, height, bits);
if (info->biSize != sizeof(BITMAPCOREHEADER))
{
if ((const char *)(info + 1) - (const char *)dir > size) return FALSE;
*bits = info->biBitCount;
}
else
{
const BITMAPCOREHEADER *coreinfo = (const BITMAPCOREHEADER *)((const char *)dir + entry->dwDIBOffset);
if ((const char *)(coreinfo + 1) - (const char *)dir > size) return FALSE;
*bits = coreinfo->bcBitCount;
}
*width = entry->bWidth;
*height = entry->bHeight;
return TRUE;
}
static const CURSORICONFILEDIRENTRY *CURSORICON_FindBestCursorFile( const CURSORICONFILEDIR *dir, DWORD size,
int width, int height, int depth,
UINT loadflags )
{
int n = CURSORICON_FindBestCursor( dir, size, CURSORICON_GetFileEntry,
width, height, depth, loadflags );
if ( n < 0 )
return NULL;
return &dir->idEntries[n];
}
static const CURSORICONFILEDIRENTRY *CURSORICON_FindBestIconFile( const CURSORICONFILEDIR *dir, DWORD size,
int width, int height, int depth,
UINT loadflags )
{
int n = CURSORICON_FindBestIcon( dir, size, CURSORICON_GetFileEntry,
width, height, depth, loadflags );
if ( n < 0 )
return NULL;
return &dir->idEntries[n];
}
/***********************************************************************
* bmi_has_alpha
*/
static BOOL bmi_has_alpha( const BITMAPINFO *info, const void *bits )
{
int i;
BOOL has_alpha = FALSE;
const unsigned char *ptr = bits;
if (info->bmiHeader.biBitCount != 32) return FALSE;
for (i = 0; i < info->bmiHeader.biWidth * abs(info->bmiHeader.biHeight); i++, ptr += 4)
if ((has_alpha = (ptr[3] != 0))) break;
return has_alpha;
}
/***********************************************************************
* create_alpha_bitmap
*
* Create the alpha bitmap for a 32-bpp icon that has an alpha channel.
*/
static HBITMAP create_alpha_bitmap( HBITMAP color, const BITMAPINFO *src_info, const void *color_bits )
{
HBITMAP alpha = 0;
BITMAPINFO *info = NULL;
BITMAP bm;
HDC hdc;
void *bits;
unsigned char *ptr;
int i;
if (!GetObjectW( color, sizeof(bm), &bm )) return 0;
if (bm.bmBitsPixel != 32) return 0;
if (!(hdc = CreateCompatibleDC( 0 ))) return 0;
if (!(info = HeapAlloc( GetProcessHeap(), 0, FIELD_OFFSET( BITMAPINFO, bmiColors[256] )))) goto done;
info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
info->bmiHeader.biWidth = bm.bmWidth;
info->bmiHeader.biHeight = -bm.bmHeight;
info->bmiHeader.biPlanes = 1;
info->bmiHeader.biBitCount = 32;
info->bmiHeader.biCompression = BI_RGB;
info->bmiHeader.biSizeImage = bm.bmWidth * bm.bmHeight * 4;
info->bmiHeader.biXPelsPerMeter = 0;
info->bmiHeader.biYPelsPerMeter = 0;
info->bmiHeader.biClrUsed = 0;
info->bmiHeader.biClrImportant = 0;
if (!(alpha = CreateDIBSection( hdc, info, DIB_RGB_COLORS, &bits, NULL, 0 ))) goto done;
if (src_info)
{
SelectObject( hdc, alpha );
StretchDIBits( hdc, 0, 0, bm.bmWidth, bm.bmHeight,
0, 0, src_info->bmiHeader.biWidth, src_info->bmiHeader.biHeight,
color_bits, src_info, DIB_RGB_COLORS, SRCCOPY );
}
else
{
GetDIBits( hdc, color, 0, bm.bmHeight, bits, info, DIB_RGB_COLORS );
if (!bmi_has_alpha( info, bits ))
{
DeleteObject( alpha );
alpha = 0;
goto done;
}
}
/* pre-multiply by alpha */
for (i = 0, ptr = bits; i < bm.bmWidth * bm.bmHeight; i++, ptr += 4)
{
unsigned int alpha = ptr[3];
ptr[0] = (ptr[0] * alpha + 127) / 255;
ptr[1] = (ptr[1] * alpha + 127) / 255;
ptr[2] = (ptr[2] * alpha + 127) / 255;
}
done:
DeleteDC( hdc );
HeapFree( GetProcessHeap(), 0, info );
return alpha;
}
static BOOL create_icon_frame( const BITMAPINFO *bmi, DWORD maxsize, POINT hotspot, BOOL is_icon,
INT width, INT height, UINT flags, struct cursoricon_frame *frame )
{
DWORD size, color_size, mask_size, compr;
const void *color_bits, *mask_bits;
void *alpha_mask_bits = NULL;
LONG bmi_width, bmi_height;
BITMAPINFO *bmi_copy;
BOOL do_stretch;
HDC hdc = 0;
WORD bpp;
BOOL ret = FALSE;
memset( frame, 0, sizeof(*frame) );
/* Check bitmap header */
if (bmi->bmiHeader.biSize == PNG_SIGN)
{
BITMAPINFO *bmi_png;
if (!(bmi_png = load_png( (const char *)bmi, &maxsize ))) return FALSE;
ret = create_icon_frame( bmi_png, maxsize, hotspot, is_icon, width, height, flags, frame );
HeapFree( GetProcessHeap(), 0, bmi_png );
return ret;
}
if (maxsize < sizeof(BITMAPCOREHEADER))
{
WARN( "invalid size %u\n", maxsize );
return FALSE;
}
if (maxsize < bmi->bmiHeader.biSize)
{
WARN( "invalid header size %u\n", bmi->bmiHeader.biSize );
return FALSE;
}
if ( (bmi->bmiHeader.biSize != sizeof(BITMAPCOREHEADER)) &&
(bmi->bmiHeader.biSize != sizeof(BITMAPINFOHEADER) ||
(bmi->bmiHeader.biCompression != BI_RGB &&
bmi->bmiHeader.biCompression != BI_BITFIELDS)) )
{
WARN( "invalid bitmap header %u\n", bmi->bmiHeader.biSize );
return FALSE;
}
size = bitmap_info_size( bmi, DIB_RGB_COLORS );
DIB_GetBitmapInfo(&bmi->bmiHeader, &bmi_width, &bmi_height, &bpp, &compr);
color_size = get_dib_image_size( bmi_width, bmi_height / 2,
bpp );
mask_size = get_dib_image_size( bmi_width, bmi_height / 2, 1 );
if (size > maxsize || color_size > maxsize - size)
{
WARN( "truncated file %u < %u+%u+%u\n", maxsize, size, color_size, mask_size );
return 0;
}
if (mask_size > maxsize - size - color_size) mask_size = 0; /* no mask */
if (flags & LR_DEFAULTSIZE)
{
if (!width) width = GetSystemMetrics( is_icon ? SM_CXICON : SM_CXCURSOR );
if (!height) height = GetSystemMetrics( is_icon ? SM_CYICON : SM_CYCURSOR );
}
else
{
if (!width) width = bmi_width;
if (!height) height = bmi_height/2;
}
do_stretch = (bmi_height/2 != height) || (bmi_width != width);
/* Scale the hotspot */
if (is_icon)
{
hotspot.x = width / 2;
hotspot.y = height / 2;
}
else if (do_stretch)
{
hotspot.x = (hotspot.x * width) / bmi_width;
hotspot.y = (hotspot.y * height) / (bmi_height / 2);
}
if (!(bmi_copy = HeapAlloc( GetProcessHeap(), 0, max( size, FIELD_OFFSET( BITMAPINFO, bmiColors[2] )))))
return 0;
if (!(hdc = CreateCompatibleDC( 0 ))) goto done;
memcpy( bmi_copy, bmi, size );
if (bmi_copy->bmiHeader.biSize != sizeof(BITMAPCOREHEADER))
bmi_copy->bmiHeader.biHeight /= 2;
else
((BITMAPCOREINFO *)bmi_copy)->bmciHeader.bcHeight /= 2;
bmi_height /= 2;
color_bits = (const char*)bmi + size;
mask_bits = (const char*)color_bits + color_size;
if (is_dib_monochrome( bmi ))
{
if (!(frame->mask = CreateBitmap( width, height * 2, 1, 1, NULL ))) goto done;
/* copy color data into second half of mask bitmap */
SelectObject( hdc, frame->mask );
StretchDIBits( hdc, 0, height, width, height,
0, 0, bmi_width, bmi_height,
color_bits, bmi_copy, DIB_RGB_COLORS, SRCCOPY );
}
else
{
if (!(frame->mask = CreateBitmap( width, height, 1, 1, NULL ))) goto done;
if (!(frame->color = create_color_bitmap( width, height ))) goto done;
SelectObject( hdc, frame->color );
StretchDIBits( hdc, 0, 0, width, height,
0, 0, bmi_width, bmi_height,
color_bits, bmi_copy, DIB_RGB_COLORS, SRCCOPY );
if (bmi_has_alpha( bmi_copy, color_bits ))
{
frame->alpha = create_alpha_bitmap( frame->color, bmi_copy, color_bits );
if (!mask_size) /* generate mask from alpha */
{
LONG x, y, dst_stride = ((bmi_width + 31) / 8) & ~3;
if ((alpha_mask_bits = heap_calloc( bmi_height, dst_stride )))
{
static const unsigned char masks[] = { 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1 };
const DWORD *src = color_bits;
unsigned char *dst = alpha_mask_bits;
for (y = 0; y < bmi_height; y++, src += bmi_width, dst += dst_stride)
for (x = 0; x < bmi_width; x++)
if (src[x] >> 24 != 0xff) dst[x >> 3] |= masks[x & 7];
mask_bits = alpha_mask_bits;
mask_size = bmi_height * dst_stride;
}
}
}
/* convert info to monochrome to copy the mask */
if (bmi_copy->bmiHeader.biSize != sizeof(BITMAPCOREHEADER))
{
RGBQUAD *rgb = bmi_copy->bmiColors;
bmi_copy->bmiHeader.biBitCount = 1;
bmi_copy->bmiHeader.biClrUsed = bmi_copy->bmiHeader.biClrImportant = 2;
rgb[0].rgbBlue = rgb[0].rgbGreen = rgb[0].rgbRed = 0x00;
rgb[1].rgbBlue = rgb[1].rgbGreen = rgb[1].rgbRed = 0xff;
rgb[0].rgbReserved = rgb[1].rgbReserved = 0;
}
else
{
RGBTRIPLE *rgb = (RGBTRIPLE *)(((BITMAPCOREHEADER *)bmi_copy) + 1);
((BITMAPCOREINFO *)bmi_copy)->bmciHeader.bcBitCount = 1;
rgb[0].rgbtBlue = rgb[0].rgbtGreen = rgb[0].rgbtRed = 0x00;
rgb[1].rgbtBlue = rgb[1].rgbtGreen = rgb[1].rgbtRed = 0xff;
}
}
if (mask_size)
{
SelectObject( hdc, frame->mask );
StretchDIBits( hdc, 0, 0, width, height,
0, 0, bmi_width, bmi_height,
mask_bits, bmi_copy, DIB_RGB_COLORS, SRCCOPY );
}
frame->width = width;
frame->height = height;
frame->hotspot = hotspot;
ret = TRUE;
done:
if (!ret) free_icon_frame( frame );
DeleteDC( hdc );
HeapFree( GetProcessHeap(), 0, bmi_copy );
HeapFree( GetProcessHeap(), 0, alpha_mask_bits );
return ret;
}
static HICON create_cursoricon_object( struct cursoricon_desc *desc, BOOL is_icon, HINSTANCE module,
const WCHAR *resname, HRSRC rsrc )
{
WCHAR buf[MAX_PATH];
UNICODE_STRING module_name = { 0, sizeof(buf), buf };
UNICODE_STRING res_str = { 0 };
HICON handle;
if (!(handle = UlongToHandle( NtUserCallOneParam( is_icon, NtUserCreateCursorIcon )))) return 0;
if (module) LdrGetDllFullName( module, &module_name );
res_str.Buffer = (WCHAR *)resname;
if (!IS_INTRESOURCE(resname))
{
res_str.Length = lstrlenW( resname ) * sizeof(WCHAR);
res_str.MaximumLength = res_str.Length + sizeof(WCHAR);
}
desc->rsrc = rsrc; /* FIXME: we should probably avoid storing rsrc */
if (!NtUserSetCursorIconData( handle, &module_name, &res_str, desc ))
{
NtUserDestroyCursor( handle, 0 );
return 0;
}
return handle;
}
/***********************************************************************
* create_icon_from_bmi
*
* Create an icon from its BITMAPINFO.
*/
static HICON create_icon_from_bmi( const BITMAPINFO *bmi, DWORD maxsize, HMODULE module, LPCWSTR resname,
HRSRC rsrc, POINT hotspot, BOOL bIcon, INT width, INT height,
UINT flags )
{
struct cursoricon_frame frame;
struct cursoricon_desc desc =
{
.flags = flags,
.frames = &frame,
};
HICON ret;
if (!create_icon_frame( bmi, maxsize, hotspot, bIcon, width, height, flags, &frame )) return 0;
ret = create_cursoricon_object( &desc, bIcon, module, resname, rsrc );
if (!ret) free_icon_frame( &frame );
return ret;
}
/**********************************************************************
* .ANI cursor support
*/
#define ANI_RIFF_ID RIFF_FOURCC('R', 'I', 'F', 'F')
#define ANI_LIST_ID RIFF_FOURCC('L', 'I', 'S', 'T')
#define ANI_ACON_ID RIFF_FOURCC('A', 'C', 'O', 'N')
#define ANI_anih_ID RIFF_FOURCC('a', 'n', 'i', 'h')
#define ANI_seq__ID RIFF_FOURCC('s', 'e', 'q', ' ')
#define ANI_fram_ID RIFF_FOURCC('f', 'r', 'a', 'm')
#define ANI_rate_ID RIFF_FOURCC('r', 'a', 't', 'e')
#define ANI_FLAG_ICON 0x1
#define ANI_FLAG_SEQUENCE 0x2
typedef struct {
DWORD header_size;
DWORD num_frames;
DWORD num_steps;
DWORD width;
DWORD height;
DWORD bpp;
DWORD num_planes;
DWORD display_rate;
DWORD flags;
} ani_header;
typedef struct {
DWORD data_size;
const unsigned char *data;
} riff_chunk_t;
static void dump_ani_header( const ani_header *header )
{
TRACE(" header size: %d\n", header->header_size);
TRACE(" frames: %d\n", header->num_frames);
TRACE(" steps: %d\n", header->num_steps);
TRACE(" width: %d\n", header->width);
TRACE(" height: %d\n", header->height);
TRACE(" bpp: %d\n", header->bpp);
TRACE(" planes: %d\n", header->num_planes);
TRACE(" display rate: %d\n", header->display_rate);
TRACE(" flags: 0x%08x\n", header->flags);
}
/*
* RIFF:
* DWORD "RIFF"
* DWORD size
* DWORD riff_id
* BYTE[] data
*
* LIST:
* DWORD "LIST"
* DWORD size
* DWORD list_id
* BYTE[] data
*
* CHUNK:
* DWORD chunk_id
* DWORD size
* BYTE[] data
*/
static void riff_find_chunk( DWORD chunk_id, DWORD chunk_type, const riff_chunk_t *parent_chunk, riff_chunk_t *chunk )
{
const unsigned char *ptr = parent_chunk->data;
const unsigned char *end = parent_chunk->data + (parent_chunk->data_size - (2 * sizeof(DWORD)));
if (chunk_type == ANI_LIST_ID || chunk_type == ANI_RIFF_ID) end -= sizeof(DWORD);
while (ptr < end)
{
if ((!chunk_type && *(const DWORD *)ptr == chunk_id )
|| (chunk_type && *(const DWORD *)ptr == chunk_type && *((const DWORD *)ptr + 2) == chunk_id ))
{
ptr += sizeof(DWORD);
chunk->data_size = (*(const DWORD *)ptr + 1) & ~1;
ptr += sizeof(DWORD);
if (chunk_type == ANI_LIST_ID || chunk_type == ANI_RIFF_ID) ptr += sizeof(DWORD);
chunk->data = ptr;
return;
}
ptr += sizeof(DWORD);
if (ptr >= end)
break;
ptr += (*(const DWORD *)ptr + 1) & ~1;
ptr += sizeof(DWORD);
}
}
/*
* .ANI layout:
*
* RIFF:'ACON' RIFF chunk
* |- CHUNK:'anih' Header
* |- CHUNK:'seq ' Sequence information (optional)
* \- LIST:'fram' Frame list
* |- CHUNK:icon Cursor frames
* |- CHUNK:icon
* |- ...
* \- CHUNK:icon
*/
static HCURSOR CURSORICON_CreateIconFromANI( const BYTE *bits, DWORD bits_size, INT width, INT height,
INT depth, BOOL is_icon, UINT loadflags )
{
struct cursoricon_desc desc = { 0 };
ani_header header;
HCURSOR cursor;
UINT i;
BOOL error = FALSE;
riff_chunk_t root_chunk = { bits_size, bits };
riff_chunk_t ACON_chunk = {0};
riff_chunk_t anih_chunk = {0};
riff_chunk_t fram_chunk = {0};
riff_chunk_t rate_chunk = {0};
riff_chunk_t seq_chunk = {0};
const unsigned char *icon_chunk;
const unsigned char *icon_data;
TRACE("bits %p, bits_size %d\n", bits, bits_size);
riff_find_chunk( ANI_ACON_ID, ANI_RIFF_ID, &root_chunk, &ACON_chunk );
if (!ACON_chunk.data)
{
ERR("Failed to get root chunk.\n");
return 0;
}
riff_find_chunk( ANI_anih_ID, 0, &ACON_chunk, &anih_chunk );
if (!anih_chunk.data)
{
ERR("Failed to get 'anih' chunk.\n");
return 0;
}
memcpy( &header, anih_chunk.data, sizeof(header) );
dump_ani_header( &header );
if (!(header.flags & ANI_FLAG_ICON))
{
FIXME("Raw animated icon/cursor data is not currently supported.\n");
return 0;
}
if (header.flags & ANI_FLAG_SEQUENCE)
{
riff_find_chunk( ANI_seq__ID, 0, &ACON_chunk, &seq_chunk );
if (seq_chunk.data)
{
desc.frame_seq = (DWORD *)seq_chunk.data;
}
else
{
FIXME("Sequence data expected but not found, assuming steps == frames.\n");
header.num_steps = header.num_frames;
}
}
riff_find_chunk( ANI_rate_ID, 0, &ACON_chunk, &rate_chunk );
if (rate_chunk.data)
desc.frame_rates = (DWORD *)rate_chunk.data;
riff_find_chunk( ANI_fram_ID, ANI_LIST_ID, &ACON_chunk, &fram_chunk );
if (!fram_chunk.data)
{
ERR("Failed to get icon list.\n");
return 0;
}
/* The .ANI stores the display rate in jiffies (1/60s) */
desc.delay = header.display_rate;
desc.num_frames = header.num_frames;
desc.num_steps = header.num_steps;
if (!(desc.frames = HeapAlloc( GetProcessHeap(), 0, sizeof(*desc.frames) * desc.num_frames )))
return 0;
icon_chunk = fram_chunk.data;
icon_data = fram_chunk.data + (2 * sizeof(DWORD));
for (i = 0; i < desc.num_frames; i++)
{
const DWORD chunk_size = *(const DWORD *)(icon_chunk + sizeof(DWORD));
const CURSORICONFILEDIRENTRY *entry;
INT frameWidth, frameHeight;
const BITMAPINFO *bmi;
POINT hotspot;
entry = CURSORICON_FindBestIconFile((const CURSORICONFILEDIR *) icon_data,
bits + bits_size - icon_data,
width, height, depth, loadflags );
hotspot.x = entry->xHotspot;
hotspot.y = entry->yHotspot;
if (!header.width || !header.height)
{
frameWidth = entry->bWidth;
frameHeight = entry->bHeight;
}
else
{
frameWidth = header.width;
frameHeight = header.height;
}
if (!(error = entry->dwDIBOffset >= bits + bits_size - icon_data))
{
bmi = (const BITMAPINFO *) (icon_data + entry->dwDIBOffset);
/* Grab a frame from the animation */
error = !create_icon_frame( bmi, bits + bits_size - (const BYTE *)bmi, hotspot,
is_icon, frameWidth, frameHeight, loadflags, &desc.frames[i] );
}
if (error)
{
if (i == 0)
{
FIXME_(cursor)("Completely failed to create animated cursor!\n");
HeapFree( GetProcessHeap(), 0, desc.frames );
return 0;
}
/* There was an error but we at least decoded the first frame, so just use that frame */
FIXME_(cursor)("Error creating animated cursor, only using first frame!\n");
while (i > 1) free_icon_frame( &desc.frames[--i] );
desc.num_frames = desc.num_steps = 1;
desc.frame_seq = NULL;
desc.delay = 0;
break;
}
/* Advance to the next chunk */
icon_chunk += chunk_size + (2 * sizeof(DWORD));
icon_data = icon_chunk + (2 * sizeof(DWORD));
}
cursor = create_cursoricon_object( &desc, is_icon, 0, 0, 0 );
if (!cursor) for (i = 0; i < desc.num_frames; i++) free_icon_frame( &desc.frames[i] );
HeapFree( GetProcessHeap(), 0, desc.frames );
return cursor;
}
/**********************************************************************
* CreateIconFromResourceEx (USER32.@)
*
* FIXME: Convert to mono when cFlag is LR_MONOCHROME.
*/
HICON WINAPI CreateIconFromResourceEx( LPBYTE bits, UINT cbSize,
BOOL bIcon, DWORD dwVersion,
INT width, INT height,
UINT cFlag )
{
POINT hotspot;
const BITMAPINFO *bmi;
TRACE_(cursor)("%p (%u bytes), ver %08x, %ix%i %s %s\n",
bits, cbSize, dwVersion, width, height,
bIcon ? "icon" : "cursor", (cFlag & LR_MONOCHROME) ? "mono" : "" );
if (!bits) return 0;
if (dwVersion == 0x00020000)
{
FIXME_(cursor)("\t2.xx resources are not supported\n");
return 0;
}
/* Check if the resource is an animated icon/cursor */
if (!memcmp(bits, "RIFF", 4))
return CURSORICON_CreateIconFromANI( bits, cbSize, width, height,
0 /* default depth */, bIcon, cFlag );
if (bIcon)
{
hotspot.x = width / 2;
hotspot.y = height / 2;
bmi = (BITMAPINFO *)bits;
}
else /* get the hotspot */
{
const SHORT *pt = (const SHORT *)bits;
hotspot.x = pt[0];
hotspot.y = pt[1];
bmi = (const BITMAPINFO *)(pt + 2);
cbSize -= 2 * sizeof(*pt);
}
return create_icon_from_bmi( bmi, cbSize, NULL, NULL, NULL, hotspot, bIcon, width, height, cFlag );
}
/**********************************************************************
* CreateIconFromResource (USER32.@)
*/
HICON WINAPI CreateIconFromResource( LPBYTE bits, UINT cbSize,
BOOL bIcon, DWORD dwVersion)
{
return CreateIconFromResourceEx( bits, cbSize, bIcon, dwVersion, 0, 0, LR_DEFAULTSIZE | LR_SHARED );
}
static HICON CURSORICON_LoadFromFile( LPCWSTR filename,
INT width, INT height, INT depth,
BOOL fCursor, UINT loadflags)
{
const CURSORICONFILEDIRENTRY *entry;
const CURSORICONFILEDIR *dir;
DWORD filesize = 0;
HICON hIcon = 0;
const BYTE *bits;
POINT hotspot;
TRACE("loading %s\n", debugstr_w( filename ));
bits = map_fileW( filename, &filesize );
if (!bits)
return hIcon;
/* Check for .ani. */
if (memcmp( bits, "RIFF", 4 ) == 0)
{
hIcon = CURSORICON_CreateIconFromANI( bits, filesize, width, height, depth, !fCursor, loadflags );
goto end;
}
dir = (const CURSORICONFILEDIR*) bits;
if ( filesize < FIELD_OFFSET( CURSORICONFILEDIR, idEntries[dir->idCount] ))
goto end;
if ( fCursor )
entry = CURSORICON_FindBestCursorFile( dir, filesize, width, height, depth, loadflags );
else
entry = CURSORICON_FindBestIconFile( dir, filesize, width, height, depth, loadflags );
if ( !entry )
goto end;
/* check that we don't run off the end of the file */
if ( entry->dwDIBOffset > filesize )
goto end;
if ( entry->dwDIBOffset + entry->dwDIBSize > filesize )
goto end;
hotspot.x = entry->xHotspot;
hotspot.y = entry->yHotspot;
hIcon = create_icon_from_bmi( (const BITMAPINFO *)&bits[entry->dwDIBOffset], filesize - entry->dwDIBOffset,
NULL, NULL, NULL, hotspot, !fCursor, width, height, loadflags );
end:
TRACE("loaded %s -> %p\n", debugstr_w( filename ), hIcon );
UnmapViewOfFile( bits );
return hIcon;
}
/**********************************************************************
* CURSORICON_Load
*
* Load a cursor or icon from resource or file.
*/
static HICON CURSORICON_Load(HINSTANCE hInstance, LPCWSTR name,
INT width, INT height, INT depth,
BOOL fCursor, UINT loadflags)
{
HANDLE handle = 0;
HICON hIcon = 0;
HRSRC hRsrc;
DWORD size;
const CURSORICONDIR *dir;
const CURSORICONDIRENTRY *dirEntry;
const BYTE *bits;
WORD wResId;
POINT hotspot;
TRACE("%p, %s, %dx%d, depth %d, fCursor %d, flags 0x%04x\n",
hInstance, debugstr_w(name), width, height, depth, fCursor, loadflags);
if ( loadflags & LR_LOADFROMFILE ) /* Load from file */
return CURSORICON_LoadFromFile( name, width, height, depth, fCursor, loadflags );
if (!hInstance) hInstance = user32_module; /* Load OEM cursor/icon */
/* don't cache 16-bit instances (FIXME: should never get 16-bit instances in the first place) */
if ((ULONG_PTR)hInstance >> 16 == 0) loadflags &= ~LR_SHARED;
/* Get directory resource ID */
if (!(hRsrc = FindResourceW( hInstance, name,
(LPWSTR)(fCursor ? RT_GROUP_CURSOR : RT_GROUP_ICON) )))
{
/* try animated resource */
if (!(hRsrc = FindResourceW( hInstance, name,
(LPWSTR)(fCursor ? RT_ANICURSOR : RT_ANIICON) ))) return 0;
if (!(handle = LoadResource( hInstance, hRsrc ))) return 0;
bits = LockResource( handle );
return CURSORICON_CreateIconFromANI( bits, SizeofResource( hInstance, handle ),
width, height, depth, !fCursor, loadflags );
}
/* Find the best entry in the directory */
if (!(handle = LoadResource( hInstance, hRsrc ))) return 0;
if (!(dir = LockResource( handle ))) return 0;
size = SizeofResource( hInstance, hRsrc );
if (fCursor)
dirEntry = CURSORICON_FindBestCursorRes( dir, size, width, height, depth, loadflags );
else
dirEntry = CURSORICON_FindBestIconRes( dir, size, width, height, depth, loadflags );
if (!dirEntry) return 0;
wResId = dirEntry->wResId;
FreeResource( handle );
/* Load the resource */
if (!(hRsrc = FindResourceW(hInstance,MAKEINTRESOURCEW(wResId),
(LPWSTR)(fCursor ? RT_CURSOR : RT_ICON) ))) return 0;
/* If shared icon, check whether it was already loaded */
if (loadflags & LR_SHARED)
{
WCHAR module_buf[MAX_PATH];
UNICODE_STRING module_str, res_str;
res_str.Length = 0;
res_str.Buffer = MAKEINTRESOURCEW(wResId);
module_str.Buffer = module_buf;
module_str.MaximumLength = sizeof(module_buf);
if (!LdrGetDllFullName( hInstance, &module_str ) &&
(hIcon = NtUserFindExistingCursorIcon( &module_str, &res_str, hRsrc )))
return hIcon;
}
if (!(handle = LoadResource( hInstance, hRsrc ))) return 0;
size = SizeofResource( hInstance, hRsrc );
bits = LockResource( handle );
if (!fCursor)
{
hotspot.x = width / 2;
hotspot.y = height / 2;
}
else /* get the hotspot */
{
const SHORT *pt = (const SHORT *)bits;
hotspot.x = pt[0];
hotspot.y = pt[1];
bits += 2 * sizeof(SHORT);
size -= 2 * sizeof(SHORT);
}
hIcon = create_icon_from_bmi( (const BITMAPINFO *)bits, size, hInstance, name, hRsrc,
hotspot, !fCursor, width, height, loadflags );
FreeResource( handle );
return hIcon;
}
static HBITMAP create_masked_bitmap( int width, int height, const void *and, const void *xor )
{
HBITMAP and_bitmap, xor_bitmap, bitmap;
HDC src_dc, dst_dc;
and_bitmap = CreateBitmap( width, height, 1, 1, and );
xor_bitmap = CreateBitmap( width, height, 1, 1, xor );
bitmap = CreateBitmap( width, height * 2, 1, 1, NULL );
src_dc = CreateCompatibleDC( 0 );
dst_dc = CreateCompatibleDC( 0 );
SelectObject( dst_dc, bitmap );
SelectObject( src_dc, and_bitmap );
BitBlt( dst_dc, 0, 0, width, height, src_dc, 0, 0, SRCCOPY );
SelectObject( src_dc, xor_bitmap );
BitBlt( dst_dc, 0, height, width, height, src_dc, 0, 0, SRCCOPY );
DeleteObject( and_bitmap );
DeleteObject( xor_bitmap );
DeleteDC( src_dc );
DeleteDC( dst_dc );
return bitmap;
}
/***********************************************************************
* CreateCursor (USER32.@)
*/
HCURSOR WINAPI CreateCursor( HINSTANCE instance, int hotspot_x, int hotspot_y,
int width, int height, const void *and, const void *xor )
{
ICONINFO info;
HCURSOR cursor;
TRACE( "hotspot (%d,%d), size %dx%d\n", hotspot_x, hotspot_y, width, height );
info.fIcon = FALSE;
info.xHotspot = hotspot_x;
info.yHotspot = hotspot_y;
info.hbmColor = NULL;
info.hbmMask = create_masked_bitmap( width, height, and, xor );
cursor = CreateIconIndirect( &info );
DeleteObject( info.hbmMask );
return cursor;
}
/***********************************************************************
* CreateIcon (USER32.@)
*
* Creates an icon based on the specified bitmaps. The bitmaps must be
* provided in a device dependent format and will be resized to
* (SM_CXICON,SM_CYICON) and depth converted to match the screen's color
* depth. The provided bitmaps must be top-down bitmaps.
* Although Windows does not support 15bpp(*) this API must support it
* for Winelib applications.
*
* (*) Windows does not support 15bpp but it supports the 555 RGB 16bpp
* format!
*
* RETURNS
* Success: handle to an icon
* Failure: NULL
*
* FIXME: Do we need to resize the bitmaps?
*/
HICON WINAPI CreateIcon( HINSTANCE instance, int width, int height, BYTE planes,
BYTE depth, const void *and, const void *xor )
{
ICONINFO info;
HICON icon;
TRACE_(icon)( "%dx%d, planes %d, depth %d\n", width, height, planes, depth );
info.fIcon = TRUE;
info.xHotspot = width / 2;
info.yHotspot = height / 2;
if (depth == 1)
{
info.hbmColor = NULL;
info.hbmMask = create_masked_bitmap( width, height, and, xor );
}
else
{
info.hbmColor = CreateBitmap( width, height, planes, depth, xor );
info.hbmMask = CreateBitmap( width, height, 1, 1, and );
}
icon = CreateIconIndirect( &info );
DeleteObject( info.hbmMask );
DeleteObject( info.hbmColor );
return icon;
}
/***********************************************************************
* CopyIcon (USER32.@)
*/
HICON WINAPI CopyIcon( HICON icon )
{
ICONINFO info;
HICON res;
if (!GetIconInfo( icon, &info ))
return NULL;
res = CopyImage( icon, info.fIcon ? IMAGE_ICON : IMAGE_CURSOR, 0, 0, 0 );
DeleteObject( info.hbmColor );
DeleteObject( info.hbmMask );
return res;
}
/***********************************************************************
* DestroyIcon (USER32.@)
*/
BOOL WINAPI DestroyIcon( HICON hIcon )
{
return NtUserDestroyCursor( hIcon, 0 );
}
/***********************************************************************
* DestroyCursor (USER32.@)
*/
BOOL WINAPI DestroyCursor( HCURSOR hCursor )
{
return DestroyIcon( hCursor );
}
/***********************************************************************
* DrawIcon (USER32.@)
*/
BOOL WINAPI DrawIcon( HDC hdc, INT x, INT y, HICON hIcon )
{
return NtUserDrawIconEx( hdc, x, y, hIcon, 0, 0, 0, 0, DI_NORMAL | DI_COMPAT | DI_DEFAULTSIZE );
}
/***********************************************************************
* GetClipCursor (USER32.@)
*/
BOOL WINAPI DECLSPEC_HOTPATCH GetClipCursor( RECT *rect )
{
return NtUserCallOneParam( (UINT_PTR)rect, NtUserGetClipCursor );
}
/***********************************************************************
* SetSystemCursor (USER32.@)
*/
BOOL WINAPI SetSystemCursor(HCURSOR hcur, DWORD id)
{
FIXME("(%p,%08x),stub!\n", hcur, id);
return TRUE;
}
/**********************************************************************
* LookupIconIdFromDirectoryEx (USER32.@)
*/
INT WINAPI LookupIconIdFromDirectoryEx( LPBYTE xdir, BOOL bIcon,
INT width, INT height, UINT cFlag )
{
const CURSORICONDIR *dir = (const CURSORICONDIR*)xdir;
UINT retVal = 0;
if( dir && !dir->idReserved && (dir->idType & 3) )
{
const CURSORICONDIRENTRY* entry;
int depth = (cFlag & LR_MONOCHROME) ? 1 : get_display_bpp();
if( bIcon )
entry = CURSORICON_FindBestIconRes( dir, ~0u, width, height, depth, LR_DEFAULTSIZE );
else
entry = CURSORICON_FindBestCursorRes( dir, ~0u, width, height, depth, LR_DEFAULTSIZE );
if( entry ) retVal = entry->wResId;
}
else WARN_(cursor)("invalid resource directory\n");
return retVal;
}
/**********************************************************************
* LookupIconIdFromDirectory (USER32.@)
*/
INT WINAPI LookupIconIdFromDirectory( LPBYTE dir, BOOL bIcon )
{
return LookupIconIdFromDirectoryEx( dir, bIcon, 0, 0, bIcon ? 0 : LR_MONOCHROME );
}
/***********************************************************************
* LoadCursorW (USER32.@)
*/
HCURSOR WINAPI LoadCursorW(HINSTANCE hInstance, LPCWSTR name)
{
TRACE("%p, %s\n", hInstance, debugstr_w(name));
return LoadImageW( hInstance, name, IMAGE_CURSOR, 0, 0,
LR_SHARED | LR_DEFAULTSIZE );
}
/***********************************************************************
* LoadCursorA (USER32.@)
*/
HCURSOR WINAPI LoadCursorA(HINSTANCE hInstance, LPCSTR name)
{
TRACE("%p, %s\n", hInstance, debugstr_a(name));
return LoadImageA( hInstance, name, IMAGE_CURSOR, 0, 0,
LR_SHARED | LR_DEFAULTSIZE );
}
/***********************************************************************
* LoadCursorFromFileW (USER32.@)
*/
HCURSOR WINAPI LoadCursorFromFileW (LPCWSTR name)
{
TRACE("%s\n", debugstr_w(name));
return LoadImageW( 0, name, IMAGE_CURSOR, 0, 0,
LR_LOADFROMFILE | LR_DEFAULTSIZE );
}
/***********************************************************************
* LoadCursorFromFileA (USER32.@)
*/
HCURSOR WINAPI LoadCursorFromFileA (LPCSTR name)
{
TRACE("%s\n", debugstr_a(name));
return LoadImageA( 0, name, IMAGE_CURSOR, 0, 0,
LR_LOADFROMFILE | LR_DEFAULTSIZE );
}
/***********************************************************************
* LoadIconW (USER32.@)
*/
HICON WINAPI LoadIconW(HINSTANCE hInstance, LPCWSTR name)
{
TRACE("%p, %s\n", hInstance, debugstr_w(name));
return LoadImageW( hInstance, name, IMAGE_ICON, 0, 0,
LR_SHARED | LR_DEFAULTSIZE );
}
/***********************************************************************
* LoadIconA (USER32.@)
*/
HICON WINAPI LoadIconA(HINSTANCE hInstance, LPCSTR name)
{
TRACE("%p, %s\n", hInstance, debugstr_a(name));
return LoadImageA( hInstance, name, IMAGE_ICON, 0, 0,
LR_SHARED | LR_DEFAULTSIZE );
}
/**********************************************************************
* GetCursorFrameInfo (USER32.@)
*
* NOTES
* So far no use has been found for the second parameter, it is currently presumed
* that this parameter is reserved for future use.
*
* PARAMS
* hCursor [I] Handle to cursor for which to retrieve information
* reserved [I] No purpose has been found for this parameter (may be NULL)
* istep [I] The step of the cursor for which to retrieve information
* rate_jiffies [O] Pointer to DWORD that receives the frame-specific delay (cannot be NULL)
* num_steps [O] Pointer to DWORD that receives the number of steps in the cursor (cannot be NULL)
*
* RETURNS
* Success: Handle to a frame of the cursor (specified by istep)
* Failure: NULL cursor (0)
*/
HCURSOR WINAPI GetCursorFrameInfo( HCURSOR handle, DWORD reserved, DWORD istep,
DWORD *rate_jiffies, DWORD *num_steps )
{
return NtUserGetCursorFrameInfo( handle, istep, rate_jiffies, num_steps );
}
/**********************************************************************
* GetIconInfo (USER32.@)
*/
BOOL WINAPI GetIconInfo( HICON icon, ICONINFO *info )
{
return NtUserGetIconInfo( icon, info, NULL, NULL, NULL, 0 );
}
/**********************************************************************
* GetIconInfoExA (USER32.@)
*/
BOOL WINAPI GetIconInfoExA( HICON icon, ICONINFOEXA *info )
{
ICONINFOEXW infoW;
if (info->cbSize != sizeof(*info))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
infoW.cbSize = sizeof(infoW);
if (!GetIconInfoExW( icon, &infoW )) return FALSE;
info->fIcon = infoW.fIcon;
info->xHotspot = infoW.xHotspot;
info->yHotspot = infoW.yHotspot;
info->hbmColor = infoW.hbmColor;
info->hbmMask = infoW.hbmMask;
info->wResID = infoW.wResID;
WideCharToMultiByte( CP_ACP, 0, infoW.szModName, -1, info->szModName, MAX_PATH, NULL, NULL );
WideCharToMultiByte( CP_ACP, 0, infoW.szResName, -1, info->szResName, MAX_PATH, NULL, NULL );
return TRUE;
}
/**********************************************************************
* GetIconInfoExW (USER32.@)
*/
BOOL WINAPI GetIconInfoExW( HICON handle, ICONINFOEXW *ret )
{
UNICODE_STRING module, res_name;
ICONINFO info;
if (ret->cbSize != sizeof(*ret))
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
module.Buffer = ret->szModName;
module.MaximumLength = sizeof(ret->szModName) - sizeof(WCHAR);
res_name.Buffer = ret->szResName;
res_name.MaximumLength = sizeof(ret->szResName) - sizeof(WCHAR);
if (!NtUserGetIconInfo( handle, &info, &module, &res_name, NULL, 0 )) return FALSE;
ret->fIcon = info.fIcon;
ret->xHotspot = info.xHotspot;
ret->yHotspot = info.yHotspot;
ret->hbmColor = info.hbmColor;
ret->hbmMask = info.hbmMask;
ret->wResID = res_name.Length ? 0 : LOWORD( res_name.Buffer );
ret->szModName[module.Length] = 0;
ret->szResName[res_name.Length] = 0;
return TRUE;
}
/* copy an icon bitmap, even when it can't be selected into a DC */
/* helper for CreateIconIndirect */
static void stretch_blt_icon( HDC hdc_dst, int dst_x, int dst_y, int dst_width, int dst_height,
HBITMAP src, int width, int height )
{
HDC hdc = CreateCompatibleDC( 0 );
if (!SelectObject( hdc, src )) /* do it the hard way */
{
BITMAPINFO *info;
void *bits;
if (!(info = HeapAlloc( GetProcessHeap(), 0, FIELD_OFFSET( BITMAPINFO, bmiColors[256] )))) return;
info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
info->bmiHeader.biWidth = width;
info->bmiHeader.biHeight = height;
info->bmiHeader.biPlanes = GetDeviceCaps( hdc_dst, PLANES );
info->bmiHeader.biBitCount = GetDeviceCaps( hdc_dst, BITSPIXEL );
info->bmiHeader.biCompression = BI_RGB;
info->bmiHeader.biSizeImage = get_dib_image_size( width, height, info->bmiHeader.biBitCount );
info->bmiHeader.biXPelsPerMeter = 0;
info->bmiHeader.biYPelsPerMeter = 0;
info->bmiHeader.biClrUsed = 0;
info->bmiHeader.biClrImportant = 0;
bits = HeapAlloc( GetProcessHeap(), 0, info->bmiHeader.biSizeImage );
if (bits && GetDIBits( hdc, src, 0, height, bits, info, DIB_RGB_COLORS ))
StretchDIBits( hdc_dst, dst_x, dst_y, dst_width, dst_height,
0, 0, width, height, bits, info, DIB_RGB_COLORS, SRCCOPY );
HeapFree( GetProcessHeap(), 0, bits );
HeapFree( GetProcessHeap(), 0, info );
}
else StretchBlt( hdc_dst, dst_x, dst_y, dst_width, dst_height, hdc, 0, 0, width, height, SRCCOPY );
DeleteDC( hdc );
}
/**********************************************************************
* CreateIconIndirect (USER32.@)
*/
HICON WINAPI CreateIconIndirect(PICONINFO iconinfo)
{
struct cursoricon_frame frame = { 0 };
struct cursoricon_desc desc = { .frames = &frame };
BITMAP bmpXor, bmpAnd;
HICON ret;
HDC hdc;
TRACE("color %p, mask %p, hotspot %ux%u, fIcon %d\n",
iconinfo->hbmColor, iconinfo->hbmMask,
iconinfo->xHotspot, iconinfo->yHotspot, iconinfo->fIcon);
if (!iconinfo->hbmMask) return 0;
GetObjectW( iconinfo->hbmMask, sizeof(bmpAnd), &bmpAnd );
TRACE("mask: width %d, height %d, width bytes %d, planes %u, bpp %u\n",
bmpAnd.bmWidth, bmpAnd.bmHeight, bmpAnd.bmWidthBytes,
bmpAnd.bmPlanes, bmpAnd.bmBitsPixel);
if (iconinfo->hbmColor)
{
GetObjectW( iconinfo->hbmColor, sizeof(bmpXor), &bmpXor );
TRACE("color: width %d, height %d, width bytes %d, planes %u, bpp %u\n",
bmpXor.bmWidth, bmpXor.bmHeight, bmpXor.bmWidthBytes,
bmpXor.bmPlanes, bmpXor.bmBitsPixel);
frame.width = bmpXor.bmWidth;
frame.height = bmpXor.bmHeight;
frame.color = create_color_bitmap( frame.width, frame.height );
}
else
{
frame.width = bmpAnd.bmWidth;
frame.height = bmpAnd.bmHeight;
}
frame.mask = CreateBitmap( frame.width, frame.height, 1, 1, NULL );
hdc = CreateCompatibleDC( 0 );
SelectObject( hdc, frame.mask );
stretch_blt_icon( hdc, 0, 0, frame.width, frame.height, iconinfo->hbmMask,
bmpAnd.bmWidth, bmpAnd.bmHeight );
if (frame.color)
{
SelectObject( hdc, frame.color );
stretch_blt_icon( hdc, 0, 0, frame.width, frame.height, iconinfo->hbmColor,
frame.width, frame.height );
}
else frame.height /= 2;
DeleteDC( hdc );
frame.alpha = create_alpha_bitmap( iconinfo->hbmColor, NULL, NULL );
if (iconinfo->fIcon)
{
frame.hotspot.x = frame.width / 2;
frame.hotspot.y = frame.height / 2;
}
else
{
frame.hotspot.x = iconinfo->xHotspot;
frame.hotspot.y = iconinfo->yHotspot;
}
ret = create_cursoricon_object( &desc, iconinfo->fIcon, 0, 0, 0 );
if (!ret) free_icon_frame( &frame );
return ret;
}
/***********************************************************************
* DIB_FixColorsToLoadflags
*
* Change color table entries when LR_LOADTRANSPARENT or LR_LOADMAP3DCOLORS
* are in loadflags
*/
static void DIB_FixColorsToLoadflags(BITMAPINFO * bmi, UINT loadflags, BYTE pix)
{
int colors;
COLORREF c_W, c_S, c_F, c_L, c_C;
int incr,i;
RGBQUAD *ptr;
int bitmap_type;
LONG width;
LONG height;
WORD bpp;
DWORD compr;
if (((bitmap_type = DIB_GetBitmapInfo((BITMAPINFOHEADER*) bmi, &width, &height, &bpp, &compr)) == -1))
{
WARN_(resource)("Invalid bitmap\n");
return;
}
if (bpp > 8) return;
if (bitmap_type == 0) /* BITMAPCOREHEADER */
{
incr = 3;
colors = 1 << bpp;
}
else
{
incr = 4;
colors = bmi->bmiHeader.biClrUsed;
if (colors > 256) colors = 256;
if (!colors && (bpp <= 8)) colors = 1 << bpp;
}
c_W = GetSysColor(COLOR_WINDOW);
c_S = GetSysColor(COLOR_3DSHADOW);
c_F = GetSysColor(COLOR_3DFACE);
c_L = GetSysColor(COLOR_3DLIGHT);
if (loadflags & LR_LOADTRANSPARENT) {
switch (bpp) {
case 1: pix = pix >> 7; break;
case 4: pix = pix >> 4; break;
case 8: break;
default:
WARN_(resource)("(%d): Unsupported depth\n", bpp);
return;
}
if (pix >= colors) {
WARN_(resource)("pixel has color index greater than biClrUsed!\n");
return;
}
if (loadflags & LR_LOADMAP3DCOLORS) c_W = c_F;
ptr = (RGBQUAD*)((char*)bmi->bmiColors+pix*incr);
ptr->rgbBlue = GetBValue(c_W);
ptr->rgbGreen = GetGValue(c_W);
ptr->rgbRed = GetRValue(c_W);
}
if (loadflags & LR_LOADMAP3DCOLORS)
for (i=0; i<colors; i++) {
ptr = (RGBQUAD*)((char*)bmi->bmiColors+i*incr);
c_C = RGB(ptr->rgbRed, ptr->rgbGreen, ptr->rgbBlue);
if (c_C == RGB(128, 128, 128)) {
ptr->rgbRed = GetRValue(c_S);
ptr->rgbGreen = GetGValue(c_S);
ptr->rgbBlue = GetBValue(c_S);
} else if (c_C == RGB(192, 192, 192)) {
ptr->rgbRed = GetRValue(c_F);
ptr->rgbGreen = GetGValue(c_F);
ptr->rgbBlue = GetBValue(c_F);
} else if (c_C == RGB(223, 223, 223)) {
ptr->rgbRed = GetRValue(c_L);
ptr->rgbGreen = GetGValue(c_L);
ptr->rgbBlue = GetBValue(c_L);
}
}
}
/**********************************************************************
* BITMAP_Load
*/
static HBITMAP BITMAP_Load( HINSTANCE instance, LPCWSTR name,
INT desiredx, INT desiredy, UINT loadflags )
{
HBITMAP hbitmap = 0, orig_bm;
HRSRC hRsrc;
HGLOBAL handle;
const char *ptr = NULL;
BITMAPINFO *info, *fix_info = NULL, *scaled_info = NULL;
int size;
BYTE pix;
char *bits;
LONG width, height, new_width, new_height;
WORD bpp_dummy;
DWORD compr_dummy, offbits = 0;
INT bm_type;
HDC screen_mem_dc = NULL;
if (!(loadflags & LR_LOADFROMFILE))
{
if (!instance)
{
/* OEM bitmap: try to load the resource from user32.dll */
instance = user32_module;
}
if (!(hRsrc = FindResourceW( instance, name, (LPWSTR)RT_BITMAP ))) return 0;
if (!(handle = LoadResource( instance, hRsrc ))) return 0;
if ((info = LockResource( handle )) == NULL) return 0;
}
else
{
BITMAPFILEHEADER * bmfh;
if (!(ptr = map_fileW( name, NULL ))) return 0;
info = (BITMAPINFO *)(ptr + sizeof(BITMAPFILEHEADER));
bmfh = (BITMAPFILEHEADER *)ptr;
if (bmfh->bfType != 0x4d42 /* 'BM' */)
{
WARN("Invalid/unsupported bitmap format!\n");
goto end;
}
if (bmfh->bfOffBits) offbits = bmfh->bfOffBits - sizeof(BITMAPFILEHEADER);
}
bm_type = DIB_GetBitmapInfo( &info->bmiHeader, &width, &height,
&bpp_dummy, &compr_dummy);
if (bm_type == -1)
{
WARN("Invalid bitmap format!\n");
goto end;
}
size = bitmap_info_size(info, DIB_RGB_COLORS);
fix_info = HeapAlloc(GetProcessHeap(), 0, size);
scaled_info = HeapAlloc(GetProcessHeap(), 0, size);
if (!fix_info || !scaled_info) goto end;
memcpy(fix_info, info, size);
pix = *((LPBYTE)info + size);
DIB_FixColorsToLoadflags(fix_info, loadflags, pix);
memcpy(scaled_info, fix_info, size);
if(desiredx != 0)
new_width = desiredx;
else
new_width = width;
if(desiredy != 0)
new_height = height > 0 ? desiredy : -desiredy;
else
new_height = height;
if(bm_type == 0)
{
BITMAPCOREHEADER *core = (BITMAPCOREHEADER *)&scaled_info->bmiHeader;
core->bcWidth = new_width;
core->bcHeight = new_height;
}
else
{
/* Some sanity checks for BITMAPINFO (not applicable to BITMAPCOREINFO) */
if (info->bmiHeader.biHeight > 65535 || info->bmiHeader.biWidth > 65535) {
WARN("Broken BitmapInfoHeader!\n");
goto end;
}
scaled_info->bmiHeader.biWidth = new_width;
scaled_info->bmiHeader.biHeight = new_height;
}
if (new_height < 0) new_height = -new_height;
if (!(screen_mem_dc = CreateCompatibleDC( 0 ))) goto end;
bits = (char *)info + (offbits ? offbits : size);
if (loadflags & LR_CREATEDIBSECTION)
{
scaled_info->bmiHeader.biCompression = 0; /* DIBSection can't be compressed */
hbitmap = CreateDIBSection(0, scaled_info, DIB_RGB_COLORS, NULL, 0, 0);
}
else
{
if (is_dib_monochrome(fix_info))
hbitmap = CreateBitmap(new_width, new_height, 1, 1, NULL);
else
hbitmap = create_color_bitmap(new_width, new_height);
}
orig_bm = SelectObject(screen_mem_dc, hbitmap);
if (info->bmiHeader.biBitCount > 1)
SetStretchBltMode(screen_mem_dc, HALFTONE);
StretchDIBits(screen_mem_dc, 0, 0, new_width, new_height, 0, 0, width, height, bits, fix_info, DIB_RGB_COLORS, SRCCOPY);
SelectObject(screen_mem_dc, orig_bm);
end:
if (screen_mem_dc) DeleteDC(screen_mem_dc);
HeapFree(GetProcessHeap(), 0, scaled_info);
HeapFree(GetProcessHeap(), 0, fix_info);
if (loadflags & LR_LOADFROMFILE) UnmapViewOfFile( ptr );
return hbitmap;
}
/**********************************************************************
* LoadImageA (USER32.@)
*
* See LoadImageW.
*/
HANDLE WINAPI LoadImageA( HINSTANCE hinst, LPCSTR name, UINT type,
INT desiredx, INT desiredy, UINT loadflags)
{
HANDLE res;
LPWSTR u_name;
if (IS_INTRESOURCE(name))
return LoadImageW(hinst, (LPCWSTR)name, type, desiredx, desiredy, loadflags);
__TRY {
DWORD len = MultiByteToWideChar( CP_ACP, 0, name, -1, NULL, 0 );
u_name = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) );
MultiByteToWideChar( CP_ACP, 0, name, -1, u_name, len );
}
__EXCEPT_PAGE_FAULT {
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
__ENDTRY
res = LoadImageW(hinst, u_name, type, desiredx, desiredy, loadflags);
HeapFree(GetProcessHeap(), 0, u_name);
return res;
}
/******************************************************************************
* LoadImageW (USER32.@) Loads an icon, cursor, or bitmap
*
* PARAMS
* hinst [I] Handle of instance that contains image
* name [I] Name of image
* type [I] Type of image
* desiredx [I] Desired width
* desiredy [I] Desired height
* loadflags [I] Load flags
*
* RETURNS
* Success: Handle to newly loaded image
* Failure: NULL
*
* FIXME: Implementation lacks some features, see LR_ defines in winuser.h
*/
HANDLE WINAPI LoadImageW( HINSTANCE hinst, LPCWSTR name, UINT type,
INT desiredx, INT desiredy, UINT loadflags )
{
int depth;
WCHAR path[MAX_PATH];
TRACE_(resource)("(%p,%s,%d,%d,%d,0x%08x)\n",
hinst,debugstr_w(name),type,desiredx,desiredy,loadflags);
if (loadflags & LR_LOADFROMFILE)
{
loadflags &= ~LR_SHARED;
/* relative paths are not only relative to the current working directory */
if (SearchPathW(NULL, name, NULL, ARRAY_SIZE(path), path, NULL)) name = path;
}
switch (type) {
case IMAGE_BITMAP:
return BITMAP_Load( hinst, name, desiredx, desiredy, loadflags );
case IMAGE_ICON:
case IMAGE_CURSOR:
depth = 1;
if (!(loadflags & LR_MONOCHROME)) depth = get_display_bpp();
return CURSORICON_Load(hinst, name, desiredx, desiredy, depth, (type == IMAGE_CURSOR), loadflags);
}
return 0;
}
/* StretchBlt from src to dest; helper for CopyImage(). */
static void stretch_bitmap( HBITMAP dst, HBITMAP src, int dst_width, int dst_height, int src_width, int src_height )
{
HDC src_dc = CreateCompatibleDC( 0 ), dst_dc = CreateCompatibleDC( 0 );
SelectObject( src_dc, src );
SelectObject( dst_dc, dst );
StretchBlt( dst_dc, 0, 0, dst_width, dst_height, src_dc, 0, 0, src_width, src_height, SRCCOPY );
DeleteDC( src_dc );
DeleteDC( dst_dc );
}
/******************************************************************************
* CopyImage (USER32.@) Creates new image and copies attributes to it
*
* PARAMS
* hnd [I] Handle to image to copy
* type [I] Type of image to copy
* desiredx [I] Desired width of new image
* desiredy [I] Desired height of new image
* flags [I] Copy flags
*
* RETURNS
* Success: Handle to newly created image
* Failure: NULL
*
* 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.
*/
HANDLE WINAPI CopyImage( HANDLE hnd, UINT type, INT desiredx,
INT desiredy, UINT flags )
{
TRACE("hnd=%p, type=%u, desiredx=%d, desiredy=%d, flags=%x\n",
hnd, type, desiredx, desiredy, flags);
switch (type)
{
case IMAGE_BITMAP:
{
HBITMAP res = NULL;
DIBSECTION ds;
int objSize;
BITMAPINFO * bi;
objSize = GetObjectW( hnd, sizeof(ds), &ds );
if (!objSize) return 0;
if ((desiredx < 0) || (desiredy < 0)) return 0;
if (flags & LR_COPYFROMRESOURCE)
{
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));
}
bi->bmiHeader.biWidth = desiredx;
bi->bmiHeader.biHeight = desiredy;
/* Get the color table or the color masks */
GetDIBits(dc, hnd, 0, ds.dsBm.bmHeight, NULL, bi, DIB_RGB_COLORS);
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.biWidth = ds.dsBm.bmWidth;
bi->bmiHeader.biHeight = ds.dsBm.bmHeight;
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
res = create_color_bitmap(desiredx, desiredy);
}
if (res)
{
/* Only copy the bitmap if it's a DIB section or if it's
compatible to the screen */
if (objSize == sizeof(DIBSECTION) ||
ds.dsBm.bmBitsPixel == 1 ||
ds.dsBm.bmBitsPixel == get_display_bpp())
{
/* The source bitmap may already be selected in a device context,
use GetDIBits/StretchDIBits and not StretchBlt */
HDC dc;
void * bits;
dc = CreateCompatibleDC(NULL);
if (ds.dsBm.bmBitsPixel > 1)
SetStretchBltMode(dc, HALFTONE);
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 res;
}
case IMAGE_ICON:
case IMAGE_CURSOR:
{
ICONINFOEXW icon_info;
int depth = (flags & LR_MONOCHROME) ? 1 : get_display_bpp();
HICON resource_icon = 0;
LONG width, height;
ICONINFO info;
HANDLE module;
HICON res;
icon_info.cbSize = sizeof(icon_info);
if (!GetIconInfoExW( hnd, &icon_info )) return 0;
if (icon_info.szModName[0] && (flags & LR_COPYFROMRESOURCE) &&
(module = GetModuleHandleW( icon_info.szModName )))
{
const WCHAR *res = icon_info.szResName[0] ? icon_info.szResName
: MAKEINTRESOURCEW( icon_info.wResID );
resource_icon = CURSORICON_Load( module, res, desiredx, desiredy, depth,
!icon_info.fIcon, flags );
DeleteObject( icon_info.hbmColor );
DeleteObject( icon_info.hbmMask );
NtUserGetIconSize( resource_icon, 0, &width, &height );
if (!GetIconInfoExW( resource_icon, &icon_info )) return 0;
}
else NtUserGetIconSize( hnd, 0, &width, &height );
height /= 2;
if (flags & LR_DEFAULTSIZE)
{
if (!desiredx) desiredx = GetSystemMetrics( type == IMAGE_ICON ? SM_CXICON : SM_CXCURSOR );
if (!desiredy) desiredy = GetSystemMetrics( type == IMAGE_ICON ? SM_CYICON : SM_CYCURSOR );
}
else
{
if (!desiredx) desiredx = width;
if (!desiredy) desiredy = height;
}
info.fIcon = icon_info.fIcon;
info.xHotspot = icon_info.xHotspot;
info.yHotspot = icon_info.yHotspot;
if (desiredx == width && desiredy == height)
{
info.hbmColor = icon_info.hbmColor;
info.hbmMask = icon_info.hbmMask;
res = CreateIconIndirect( &info );
}
else
{
if (icon_info.hbmColor)
{
if (!(info.hbmColor = create_color_bitmap( desiredx, desiredy )))
{
DeleteObject( icon_info.hbmColor );
DeleteObject( icon_info.hbmMask );
if (resource_icon) DestroyIcon( resource_icon );
return 0;
}
stretch_bitmap( info.hbmColor, icon_info.hbmColor, desiredx, desiredy,
width, height );
if (!(info.hbmMask = CreateBitmap( desiredx, desiredy, 1, 1, NULL )))
{
DeleteObject( icon_info.hbmColor );
DeleteObject( icon_info.hbmMask );
DeleteObject( info.hbmColor );
if (resource_icon) DestroyIcon( resource_icon );
return 0;
}
stretch_bitmap( info.hbmMask, icon_info.hbmMask, desiredx, desiredy,
width, height );
}
else
{
info.hbmColor = NULL;
if (!(info.hbmMask = CreateBitmap( desiredx, desiredy * 2, 1, 1, NULL )))
{
DeleteObject( icon_info.hbmColor );
DeleteObject( icon_info.hbmMask );
if (resource_icon) DestroyIcon( resource_icon );
return 0;
}
stretch_bitmap( info.hbmMask, icon_info.hbmMask, desiredx, desiredy * 2,
width, height * 2 );
}
res = CreateIconIndirect( &info );
DeleteObject( info.hbmColor );
DeleteObject( info.hbmMask );
}
DeleteObject( icon_info.hbmColor );
DeleteObject( icon_info.hbmMask );
if (res && (flags & LR_COPYDELETEORG)) DestroyIcon( hnd );
if (resource_icon) DestroyIcon( resource_icon );
return res;
}
}
return 0;
}
/******************************************************************************
* LoadBitmapW (USER32.@) Loads bitmap from the executable file
*
* RETURNS
* Success: Handle to specified bitmap
* Failure: NULL
*/
HBITMAP WINAPI LoadBitmapW(
HINSTANCE instance, /* [in] Handle to application instance */
LPCWSTR name) /* [in] Address of bitmap resource name */
{
return LoadImageW( instance, name, IMAGE_BITMAP, 0, 0, 0 );
}
/**********************************************************************
* LoadBitmapA (USER32.@)
*
* See LoadBitmapW.
*/
HBITMAP WINAPI LoadBitmapA( HINSTANCE instance, LPCSTR name )
{
return LoadImageA( instance, name, IMAGE_BITMAP, 0, 0, 0 );
}
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