dll/win32/windowscodecs/main.c

   1 /*
   2  * Copyright 2009 Vincent Povirk for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #define WIN32_NO_STATUS
  20 #define _INC_WINDOWS
  21 #define COM_NO_WINDOWS_H
  22
  23 #define COBJMACROS
  24 #include <config.h>
  25
  26 #include <stdarg.h>
  27
  28 #include <windef.h>
  29 #include <winbase.h>
  30 #include <objbase.h>
  31 #include <wincodec.h>
  32
  33 #include "wincodecs_private.h"
  34
  35 #include <wine/debug.h>
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
  38
  39 extern BOOL WINAPI WIC_DllMain(HINSTANCE, DWORD, LPVOID) DECLSPEC_HIDDEN;
  40
  41 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
  42 {
  43
  44     switch (fdwReason)
  45     {
  46         case DLL_PROCESS_ATTACH:
  47             DisableThreadLibraryCalls(hinstDLL);
  48             break;
  49         case DLL_PROCESS_DETACH:
  50             break;
  51     }
  52
  53     return WIC_DllMain(hinstDLL, fdwReason, lpvReserved);
  54 }
  55
  56 HRESULT WINAPI DllCanUnloadNow(void)
  57 {
  58     return S_FALSE;
  59 }
  60
  61 HRESULT copy_pixels(UINT bpp, const BYTE *srcbuffer,
  62     UINT srcwidth, UINT srcheight, INT srcstride,
  63     const WICRect *rc, UINT dststride, UINT dstbuffersize, BYTE *dstbuffer)
  64 {
  65     UINT bytesperrow;
  66     UINT row_offset; /* number of bits into the source rows where the data starts */
  67     WICRect rect;
  68
  69     if (!rc)
  70     {
  71         rect.X = 0;
  72         rect.Y = 0;
  73         rect.Width = srcwidth;
  74         rect.Height = srcheight;
  75         rc = &rect;
  76     }
  77     else
  78     {
  79         if (rc->X < 0 || rc->Y < 0 || rc->X+rc->Width > srcwidth || rc->Y+rc->Height > srcheight)
  80             return E_INVALIDARG;
  81     }
  82
  83     bytesperrow = ((bpp * rc->Width)+7)/8;
  84
  85     if (dststride < bytesperrow)
  86         return E_INVALIDARG;
  87
  88     if ((dststride * (rc->Height-1)) + ((rc->Width * bpp) + 7)/8 > dstbuffersize)
  89         return E_INVALIDARG;
  90
  91     /* if the whole bitmap is copied and the buffer format matches then it's a matter of a single memcpy */
  92     if (rc->X == 0 && rc->Y == 0 && rc->Width == srcwidth && rc->Height == srcheight &&
  93         srcstride == dststride && srcstride == bytesperrow)
  94     {
  95         memcpy(dstbuffer, srcbuffer, srcstride * srcheight);
  96         return S_OK;
  97     }
  98
  99     row_offset = rc->X * bpp;
 100
 101     if (row_offset % 8 == 0)
 102     {
 103         /* everything lines up on a byte boundary */
 104         INT row;
 105         const BYTE *src;
 106         BYTE *dst;
 107
 108         src = srcbuffer + (row_offset / 8) + srcstride * rc->Y;
 109         dst = dstbuffer;
 110         for (row=0; row < rc->Height; row++)
 111         {
 112             memcpy(dst, src, bytesperrow);
 113             src += srcstride;
 114             dst += dststride;
 115         }
 116         return S_OK;
 117     }
 118     else
 119     {
 120         /* we have to do a weird bitwise copy. eww. */
 121         FIXME("cannot reliably copy bitmap data if bpp < 8\n");
 122         return E_FAIL;
 123     }
 124 }
 125
 126 void reverse_bgr8(UINT bytesperpixel, LPBYTE bits, UINT width, UINT height, INT stride)
 127 {
 128     UINT x, y;
 129     BYTE *pixel, temp;
 130
 131     for (y=0; y<height; y++)
 132     {
 133         pixel = bits + stride * y;
 134
 135         for (x=0; x<width; x++)
 136         {
 137             temp = pixel[2];
 138             pixel[2] = pixel[0];
 139             pixel[0] = temp;
 140             pixel += bytesperpixel;
 141         }
 142     }
 143 }
 144
 145 HRESULT get_pixelformat_bpp(const GUID *pixelformat, UINT *bpp)
 146 {
 147     HRESULT hr;
 148     IWICComponentInfo *info;
 149     IWICPixelFormatInfo *formatinfo;
 150
 151     hr = CreateComponentInfo(pixelformat, &info);
 152     if (SUCCEEDED(hr))
 153     {
 154         hr = IWICComponentInfo_QueryInterface(info, &IID_IWICPixelFormatInfo, (void**)&formatinfo);
 155
 156         if (SUCCEEDED(hr))
 157         {
 158             hr = IWICPixelFormatInfo_GetBitsPerPixel(formatinfo, bpp);
 159
 160             IWICPixelFormatInfo_Release(formatinfo);
 161         }
 162
 163         IWICComponentInfo_Release(info);
 164     }
 165
 166     return hr;
 167 }