Sweden-Number/dlls/gdiplus/image.c

/*
 * Copyright (C) 2007 Google (Evan Stade)
 *
 * 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 <stdarg.h>

#define NONAMELESSUNION

#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "wingdi.h"

#define COBJMACROS
#include "objbase.h"
#include "olectl.h"
#include "ole2.h"

#include "initguid.h"
#include "gdiplus.h"
#include "gdiplus_private.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);

#define PIXELFORMATBPP(x) ((x) ? ((x) >> 8) & 255 : 24)

static INT ipicture_pixel_height(IPicture *pic)
{
    HDC hdcref;
    OLE_YSIZE_HIMETRIC y;

    IPicture_get_Height(pic, &y);

    hdcref = GetDC(0);

    y = MulDiv(y, GetDeviceCaps(hdcref, LOGPIXELSY), INCH_HIMETRIC);
    ReleaseDC(0, hdcref);

    return y;
}

static INT ipicture_pixel_width(IPicture *pic)
{
    HDC hdcref;
    OLE_XSIZE_HIMETRIC x;

    IPicture_get_Width(pic, &x);

    hdcref = GetDC(0);

    x = MulDiv(x, GetDeviceCaps(hdcref, LOGPIXELSX), INCH_HIMETRIC);

    ReleaseDC(0, hdcref);

    return x;
}

GpStatus WINGDIPAPI GdipBitmapApplyEffect(GpBitmap* bitmap, CGpEffect* effect,
    RECT* roi, BOOL useAuxData, VOID** auxData, INT* auxDataSize)
{
    FIXME("(%p %p %p %d %p %p): stub\n", bitmap, effect, roi, useAuxData, auxData, auxDataSize);
    /*
     * Note: According to Jose Roca's GDI+ docs, this function is not
     * implemented in Windows's GDI+.
     */
    return NotImplemented;
}

GpStatus WINGDIPAPI GdipBitmapCreateApplyEffect(GpBitmap** inputBitmaps,
    INT numInputs, CGpEffect* effect, RECT* roi, RECT* outputRect,
    GpBitmap** outputBitmap, BOOL useAuxData, VOID** auxData, INT* auxDataSize)
{
    FIXME("(%p %d %p %p %p %p %d %p %p): stub\n", inputBitmaps, numInputs, effect, roi, outputRect, outputBitmap, useAuxData, auxData, auxDataSize);
    /*
     * Note: According to Jose Roca's GDI+ docs, this function is not
     * implemented in Windows's GDI+.
     */
    return NotImplemented;
}

GpStatus WINGDIPAPI GdipBitmapGetPixel(GpBitmap* bitmap, INT x, INT y,
    ARGB *color)
{
    static int calls;
    TRACE("%p %d %d %p\n", bitmap, x, y, color);

    if(!bitmap || !color)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    *color = 0xdeadbeef;

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipBitmapSetPixel(GpBitmap* bitmap, INT x, INT y,
    ARGB color)
{
    static int calls;
    TRACE("bitmap:%p, x:%d, y:%d, color:%08x\n", bitmap, x, y, color);

    if(!bitmap)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

/* This function returns a pointer to an array of pixels that represents the
 * bitmap. The *entire* bitmap is locked according to the lock mode specified by
 * flags.  It is correct behavior that a user who calls this function with write
 * privileges can write to the whole bitmap (not just the area in rect).
 *
 * FIXME: only used portion of format is bits per pixel. */
GpStatus WINGDIPAPI GdipBitmapLockBits(GpBitmap* bitmap, GDIPCONST GpRect* rect,
    UINT flags, PixelFormat format, BitmapData* lockeddata)
{
    BOOL bm_is_selected;
    INT stride, bitspp = PIXELFORMATBPP(format);
    HDC hdc;
    HBITMAP hbm, old = NULL;
    BITMAPINFO *pbmi;
    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)
        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;

    if(bitmap->lockmode)
        return WrongState;

    hbm = bitmap->hbitmap;
    IPicture_get_CurDC(bitmap->image.picture, &hdc);
    bm_is_selected = (hdc != 0);

    pbmi = GdipAlloc(sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
    if (!pbmi)
        return OutOfMemory;
    pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    pbmi->bmiHeader.biBitCount = 0;

    if(!bm_is_selected){
        hdc = CreateCompatibleDC(0);
        old = SelectObject(hdc, hbm);
    }

    /* fill out bmi */
    GetDIBits(hdc, hbm, 0, 0, NULL, pbmi, DIB_RGB_COLORS);

    abs_height = abs(pbmi->bmiHeader.biHeight);
    stride = pbmi->bmiHeader.biWidth * bitspp / 8;
    stride = (stride + 3) & ~3;

    buff = GdipAlloc(stride * abs_height);

    pbmi->bmiHeader.biBitCount = bitspp;

    if(buff)
        GetDIBits(hdc, hbm, 0, abs_height, buff, pbmi, DIB_RGB_COLORS);

    if(!bm_is_selected){
        SelectObject(hdc, old);
        DeleteDC(hdc);
    }

    if(!buff){
        GdipFree(pbmi);
        return OutOfMemory;
    }

    lockeddata->Width  = act_rect.Width;
    lockeddata->Height = act_rect.Height;
    lockeddata->PixelFormat = format;
    lockeddata->Reserved = flags;

    if(pbmi->bmiHeader.biHeight > 0){
        lockeddata->Stride = -stride;
        lockeddata->Scan0  = buff + (bitspp / 8) * act_rect.X +
                             stride * (abs_height - 1 - act_rect.Y);
    }
    else{
        lockeddata->Stride = stride;
        lockeddata->Scan0  = buff + (bitspp / 8) * act_rect.X + stride * act_rect.Y;
    }

    bitmap->lockmode = flags;
    bitmap->numlocks++;

    bitmap->bitmapbits = buff;

    GdipFree(pbmi);
    return Ok;
}

GpStatus WINGDIPAPI GdipBitmapSetResolution(GpBitmap* bitmap, REAL xdpi, REAL ydpi)
{
    FIXME("(%p, %.2f, %.2f)\n", bitmap, xdpi, ydpi);

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipBitmapUnlockBits(GpBitmap* bitmap,
    BitmapData* lockeddata)
{
    HDC hdc;
    HBITMAP hbm, old = NULL;
    BOOL bm_is_selected;
    BITMAPINFO *pbmi;

    if(!bitmap || !lockeddata)
        return InvalidParameter;

    if(!bitmap->lockmode)
        return WrongState;

    if(lockeddata->Reserved & ImageLockModeUserInputBuf)
        return NotImplemented;

    if(lockeddata->Reserved & ImageLockModeRead){
        if(!(--bitmap->numlocks))
            bitmap->lockmode = 0;

        GdipFree(bitmap->bitmapbits);
        bitmap->bitmapbits = NULL;
        return Ok;
    }

    hbm = bitmap->hbitmap;
    IPicture_get_CurDC(bitmap->image.picture, &hdc);
    bm_is_selected = (hdc != 0);

    pbmi = GdipAlloc(sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
    pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    pbmi->bmiHeader.biBitCount = 0;

    if(!bm_is_selected){
        hdc = CreateCompatibleDC(0);
        old = SelectObject(hdc, hbm);
    }

    GetDIBits(hdc, hbm, 0, 0, NULL, pbmi, DIB_RGB_COLORS);
    pbmi->bmiHeader.biBitCount = PIXELFORMATBPP(lockeddata->PixelFormat);
    SetDIBits(hdc, hbm, 0, abs(pbmi->bmiHeader.biHeight),
              bitmap->bitmapbits, pbmi, DIB_RGB_COLORS);

    if(!bm_is_selected){
        SelectObject(hdc, old);
        DeleteDC(hdc);
    }

    GdipFree(pbmi);
    GdipFree(bitmap->bitmapbits);
    bitmap->bitmapbits = NULL;
    bitmap->lockmode = 0;

    return Ok;
}

GpStatus WINGDIPAPI GdipCloneBitmapArea(REAL x, REAL y, REAL width, REAL height,
    PixelFormat format, GpBitmap* srcBitmap, GpBitmap** dstBitmap)
{
    FIXME("(%f,%f,%f,%f,%i,%p,%p): stub\n", x, y, width, height, format, srcBitmap, dstBitmap);

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipCloneBitmapAreaI(INT x, INT y, INT width, INT height,
    PixelFormat format, GpBitmap* srcBitmap, GpBitmap** dstBitmap)
{
    FIXME("(%i,%i,%i,%i,%i,%p,%p): stub\n", x, y, width, height, format, srcBitmap, dstBitmap);

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipCloneImage(GpImage *image, GpImage **cloneImage)
{
    IStream* stream;
    HRESULT hr;
    INT size;
    LARGE_INTEGER move;
    GpStatus stat = GenericError;

    TRACE("%p, %p\n", image, cloneImage);

    if (!image || !cloneImage)
        return InvalidParameter;

    hr = CreateStreamOnHGlobal(0, TRUE, &stream);
    if (FAILED(hr))
        return GenericError;

    hr = IPicture_SaveAsFile(image->picture, stream, FALSE, &size);
    if(FAILED(hr))
    {
        WARN("Failed to save image on stream\n");
        goto out;
    }

    /* Set seek pointer back to the beginning of the picture */
    move.QuadPart = 0;
    hr = IStream_Seek(stream, move, STREAM_SEEK_SET, NULL);
    if (FAILED(hr))
        goto out;

    stat = GdipLoadImageFromStream(stream, cloneImage);
    if (stat != Ok) WARN("Failed to load image from stream\n");

out:
    IStream_Release(stream);
    return stat;
}

GpStatus WINGDIPAPI GdipCreateBitmapFromFile(GDIPCONST WCHAR* filename,
    GpBitmap **bitmap)
{
    GpStatus stat;
    IStream *stream;

    TRACE("(%s) %p\n", debugstr_w(filename), bitmap);

    if(!filename || !bitmap)
        return InvalidParameter;

    stat = GdipCreateStreamOnFile(filename, GENERIC_READ, &stream);

    if(stat != Ok)
        return stat;

    stat = GdipCreateBitmapFromStream(stream, bitmap);

    IStream_Release(stream);

    return stat;
}

GpStatus WINGDIPAPI GdipCreateBitmapFromGdiDib(GDIPCONST BITMAPINFO* info,
                                               VOID *bits, GpBitmap **bitmap)
{
    DWORD height, stride;
    PixelFormat format;

    FIXME("(%p, %p, %p) - partially implemented\n", info, bits, bitmap);

    height = abs(info->bmiHeader.biHeight);
    stride = ((info->bmiHeader.biWidth * info->bmiHeader.biBitCount + 31) >> 3) & ~3;

    if(info->bmiHeader.biHeight > 0) /* bottom-up */
    {
        bits = (BYTE*)bits + (height - 1) * stride;
        stride = -stride;
    }

    switch(info->bmiHeader.biBitCount) {
    case 1:
        format = PixelFormat1bppIndexed;
        break;
    case 4:
        format = PixelFormat4bppIndexed;
        break;
    case 8:
        format = PixelFormat8bppIndexed;
        break;
    case 24:
        format = PixelFormat24bppRGB;
        break;
    default:
        FIXME("don't know how to handle %d bpp\n", info->bmiHeader.biBitCount);
        *bitmap = NULL;
        return InvalidParameter;
    }

    return GdipCreateBitmapFromScan0(info->bmiHeader.biWidth, height, stride, format,
                                     bits, bitmap);

}

/* FIXME: no icm */
GpStatus WINGDIPAPI GdipCreateBitmapFromFileICM(GDIPCONST WCHAR* filename,
    GpBitmap **bitmap)
{
    TRACE("(%s) %p\n", debugstr_w(filename), bitmap);

    return GdipCreateBitmapFromFile(filename, bitmap);
}

GpStatus WINGDIPAPI GdipCreateBitmapFromResource(HINSTANCE hInstance,
    GDIPCONST WCHAR* lpBitmapName, GpBitmap** bitmap)
{
    HBITMAP hbm;
    GpStatus stat = InvalidParameter;

    TRACE("%p (%s) %p\n", hInstance, debugstr_w(lpBitmapName), bitmap);

    if(!lpBitmapName || !bitmap)
        return InvalidParameter;

    /* load DIB */
    hbm = LoadImageW(hInstance, lpBitmapName, IMAGE_BITMAP, 0, 0,
                     LR_CREATEDIBSECTION);

    if(hbm){
        stat = GdipCreateBitmapFromHBITMAP(hbm, NULL, bitmap);
        DeleteObject(hbm);
    }

    return stat;
}

GpStatus WINGDIPAPI GdipCreateHBITMAPFromBitmap(GpBitmap* bitmap,
    HBITMAP* hbmReturn, ARGB background)
{
    GpStatus stat;
    HBITMAP result, oldbitmap;
    UINT width, height;
    HDC hdc;
    GpGraphics *graphics;
    BITMAPINFOHEADER bih;
    void *bits;
    TRACE("(%p,%p,%x)\n", bitmap, hbmReturn, background);

    if (!bitmap || !hbmReturn) return InvalidParameter;

    GdipGetImageWidth((GpImage*)bitmap, &width);
    GdipGetImageHeight((GpImage*)bitmap, &height);

    bih.biSize = sizeof(bih);
    bih.biWidth = width;
    bih.biHeight = height;
    bih.biPlanes = 1;
    bih.biBitCount = 32;
    bih.biCompression = BI_RGB;
    bih.biSizeImage = 0;
    bih.biXPelsPerMeter = 0;
    bih.biYPelsPerMeter = 0;
    bih.biClrUsed = 0;
    bih.biClrImportant = 0;

    hdc = CreateCompatibleDC(NULL);
    if (!hdc) return GenericError;

    result = CreateDIBSection(hdc, (BITMAPINFO*)&bih, DIB_RGB_COLORS, &bits,
        NULL, 0);

    if (result)
    {
        oldbitmap = SelectObject(hdc, result);

        stat = GdipCreateFromHDC(hdc, &graphics);
        if (stat == Ok)
        {
            stat = GdipGraphicsClear(graphics, background);

            if (stat == Ok)
                stat = GdipDrawImage(graphics, (GpImage*)bitmap, 0, 0);

            GdipDeleteGraphics(graphics);
        }

        SelectObject(hdc, oldbitmap);
    }
    else
        stat = GenericError;

    DeleteDC(hdc);

    if (stat != Ok && result)
    {
        DeleteObject(result);
        result = NULL;
    }

    *hbmReturn = result;

    return stat;
}

GpStatus WINGDIPAPI GdipConvertToEmfPlus(const GpGraphics* ref,
    GpMetafile* metafile, BOOL* succ, EmfType emfType,
    const WCHAR* description, GpMetafile** out_metafile)
{
    static int calls;

    if(!ref || !metafile || !out_metafile)
        return InvalidParameter;

    *succ = FALSE;
    *out_metafile = NULL;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

/* FIXME: this should create a bitmap in the given size with the attributes
 * (resolution etc.) of the graphics object */
GpStatus WINGDIPAPI GdipCreateBitmapFromGraphics(INT width, INT height,
    GpGraphics* target, GpBitmap** bitmap)
{
    static int calls;
    GpStatus ret;

    if(!target || !bitmap)
        return InvalidParameter;

    if(!(calls++))
        FIXME("hacked stub\n");

    ret = GdipCreateBitmapFromScan0(width, height, 0, PixelFormat24bppRGB,
                                    NULL, bitmap);

    return ret;
}

GpStatus WINGDIPAPI GdipCreateBitmapFromHICON(HICON hicon, GpBitmap** bitmap)
{
    HICON icon_copy;
    ICONINFO iinfo;
    PICTDESC desc;

    TRACE("%p, %p\n", hicon, bitmap);

    if(!bitmap || !GetIconInfo(hicon, &iinfo))
        return InvalidParameter;

    *bitmap = GdipAlloc(sizeof(GpBitmap));
    if(!*bitmap)    return OutOfMemory;

    icon_copy = CreateIconIndirect(&iinfo);

    if(!icon_copy){
        GdipFree(*bitmap);
        return InvalidParameter;
    }

    desc.cbSizeofstruct = sizeof(PICTDESC);
    desc.picType = PICTYPE_ICON;
    desc.u.icon.hicon = icon_copy;

    if(OleCreatePictureIndirect(&desc, &IID_IPicture, TRUE,
                                (LPVOID*) &((*bitmap)->image.picture)) != S_OK){
        DestroyIcon(icon_copy);
        GdipFree(*bitmap);
        return GenericError;
    }

    (*bitmap)->format = PixelFormat32bppARGB;
    (*bitmap)->image.type  = ImageTypeBitmap;
    (*bitmap)->image.flags = ImageFlagsNone;
    (*bitmap)->width  = ipicture_pixel_width((*bitmap)->image.picture);
    (*bitmap)->height = ipicture_pixel_height((*bitmap)->image.picture);
    (*bitmap)->hbitmap = NULL;

    DeleteObject(iinfo.hbmColor);
    DeleteObject(iinfo.hbmMask);

    return Ok;
}

GpStatus WINGDIPAPI GdipCreateBitmapFromScan0(INT width, INT height, INT stride,
    PixelFormat format, BYTE* scan0, GpBitmap** bitmap)
{
    BITMAPFILEHEADER *bmfh;
    BITMAPINFOHEADER *bmih;
    BYTE *buff;
    INT datalen, size;
    IStream *stream;

    TRACE("%d %d %d %d %p %p\n", width, height, stride, format, scan0, bitmap);

    if (!bitmap) return InvalidParameter;

    if(width <= 0 || height <= 0 || (scan0 && (stride % 4))){
        *bitmap = NULL;
        return InvalidParameter;
    }

    if(scan0 && !stride)
        return InvalidParameter;

    *bitmap = GdipAlloc(sizeof(GpBitmap));
    if(!*bitmap)    return OutOfMemory;

    if(stride == 0){
        stride = width * (PIXELFORMATBPP(format) / 8);
        stride = (stride + 3) & ~3;
    }

    datalen = abs(stride * height);
    size = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + datalen;
    buff = GdipAlloc(size);
    if(!buff){
        GdipFree(*bitmap);
        return OutOfMemory;
    }

    bmfh = (BITMAPFILEHEADER*) buff;
    bmih = (BITMAPINFOHEADER*) (bmfh + 1);

    bmfh->bfType    = (((WORD)'M') << 8) + (WORD)'B';
    bmfh->bfSize    = size;
    bmfh->bfOffBits = size - datalen;

    bmih->biSize            = sizeof(BITMAPINFOHEADER);
    bmih->biWidth           = width;
    /* FIXME: use the rest of the data from format */
    bmih->biBitCount        = PIXELFORMATBPP(format);
    bmih->biCompression     = BI_RGB;
    bmih->biSizeImage       = datalen;

    if (scan0)
    {
        if (stride > 0)
        {
            bmih->biHeight = -height;
            memcpy(bmih + 1, scan0, datalen);
        }
        else
        {
            bmih->biHeight = height;
            memcpy(bmih + 1, scan0 + stride * (height - 1), datalen);
        }
    }
    else
    {
        bmih->biHeight = height;
        memset(bmih + 1, 0, datalen);
    }

    if(CreateStreamOnHGlobal(buff, TRUE, &stream) != S_OK){
        ERR("could not make stream\n");
        GdipFree(*bitmap);
        GdipFree(buff);
        *bitmap = NULL;
        return GenericError;
    }

    if(OleLoadPicture(stream, 0, FALSE, &IID_IPicture,
        (LPVOID*) &((*bitmap)->image.picture)) != S_OK){
        TRACE("Could not load picture\n");
        IStream_Release(stream);
        GdipFree(*bitmap);
        GdipFree(buff);
        *bitmap = NULL;
        return GenericError;
    }

    (*bitmap)->image.type = ImageTypeBitmap;
    (*bitmap)->image.flags = ImageFlagsNone;
    (*bitmap)->width = width;
    (*bitmap)->height = height;
    (*bitmap)->format = format;
    IPicture_get_Handle((*bitmap)->image.picture, (OLE_HANDLE*)&(*bitmap)->hbitmap);

    return Ok;
}

GpStatus WINGDIPAPI GdipCreateBitmapFromStream(IStream* stream,
    GpBitmap **bitmap)
{
    GpStatus stat;

    TRACE("%p %p\n", stream, bitmap);

    stat = GdipLoadImageFromStream(stream, (GpImage**) bitmap);

    if(stat != Ok)
        return stat;

    if((*bitmap)->image.type != ImageTypeBitmap){
        GdipDisposeImage(&(*bitmap)->image);
        *bitmap = NULL;
        return GenericError; /* FIXME: what error to return? */
    }

    return Ok;
}

/* FIXME: no icm */
GpStatus WINGDIPAPI GdipCreateBitmapFromStreamICM(IStream* stream,
    GpBitmap **bitmap)
{
    TRACE("%p %p\n", stream, bitmap);

    return GdipCreateBitmapFromStream(stream, bitmap);
}

GpStatus WINGDIPAPI GdipCreateCachedBitmap(GpBitmap *bitmap, GpGraphics *graphics,
    GpCachedBitmap **cachedbmp)
{
    GpStatus stat;

    TRACE("%p %p %p\n", bitmap, graphics, cachedbmp);

    if(!bitmap || !graphics || !cachedbmp)
        return InvalidParameter;

    *cachedbmp = GdipAlloc(sizeof(GpCachedBitmap));
    if(!*cachedbmp)
        return OutOfMemory;

    stat = GdipCloneImage(&(bitmap->image), &(*cachedbmp)->image);
    if(stat != Ok){
        GdipFree(*cachedbmp);
        return stat;
    }

    return Ok;
}

GpStatus WINGDIPAPI GdipCreateHICONFromBitmap(GpBitmap *bitmap, HICON *hicon)
{
    FIXME("(%p, %p)\n", bitmap, hicon);

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipDeleteCachedBitmap(GpCachedBitmap *cachedbmp)
{
    TRACE("%p\n", cachedbmp);

    if(!cachedbmp)
        return InvalidParameter;

    GdipDisposeImage(cachedbmp->image);
    GdipFree(cachedbmp);

    return Ok;
}

GpStatus WINGDIPAPI GdipDrawCachedBitmap(GpGraphics *graphics,
    GpCachedBitmap *cachedbmp, INT x, INT y)
{
    TRACE("%p %p %d %d\n", graphics, cachedbmp, x, y);

    if(!graphics || !cachedbmp)
        return InvalidParameter;

    return GdipDrawImage(graphics, cachedbmp->image, (REAL)x, (REAL)y);
}

GpStatus WINGDIPAPI GdipEmfToWmfBits(HENHMETAFILE hemf, UINT cbData16,
    LPBYTE pData16, INT iMapMode, INT eFlags)
{
    FIXME("(%p, %d, %p, %d, %d): stub\n", hemf, cbData16, pData16, iMapMode, eFlags);
    return NotImplemented;
}

GpStatus WINGDIPAPI GdipDisposeImage(GpImage *image)
{
    HDC hdc;

    TRACE("%p\n", image);

    if(!image)
        return InvalidParameter;

    IPicture_get_CurDC(image->picture, &hdc);
    DeleteDC(hdc);
    IPicture_Release(image->picture);
    if (image->type == ImageTypeBitmap)
        GdipFree(((GpBitmap*)image)->bitmapbits);
    GdipFree(image);

    return Ok;
}

GpStatus WINGDIPAPI GdipFindFirstImageItem(GpImage *image, ImageItemData* item)
{
    if(!image || !item)
        return InvalidParameter;

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipGetImageBounds(GpImage *image, GpRectF *srcRect,
    GpUnit *srcUnit)
{
    TRACE("%p %p %p\n", image, srcRect, srcUnit);

    if(!image || !srcRect || !srcUnit)
        return InvalidParameter;
    if(image->type == ImageTypeMetafile){
        *srcRect = ((GpMetafile*)image)->bounds;
        *srcUnit = ((GpMetafile*)image)->unit;
    }
    else if(image->type == ImageTypeBitmap){
        srcRect->X = srcRect->Y = 0.0;
        srcRect->Width = (REAL) ((GpBitmap*)image)->width;
        srcRect->Height = (REAL) ((GpBitmap*)image)->height;
        *srcUnit = UnitPixel;
    }
    else{
        srcRect->X = srcRect->Y = 0.0;
        srcRect->Width = ipicture_pixel_width(image->picture);
        srcRect->Height = ipicture_pixel_height(image->picture);
        *srcUnit = UnitPixel;
    }

    TRACE("returning (%f, %f) (%f, %f) unit type %d\n", srcRect->X, srcRect->Y,
          srcRect->Width, srcRect->Height, *srcUnit);

    return Ok;
}

GpStatus WINGDIPAPI GdipGetImageDimension(GpImage *image, REAL *width,
    REAL *height)
{
    TRACE("%p %p %p\n", image, width, height);

    if(!image || !height || !width)
        return InvalidParameter;

    if(image->type == ImageTypeMetafile){
        HDC hdc = GetDC(0);

        *height = convert_unit(hdc, ((GpMetafile*)image)->unit) *
                        ((GpMetafile*)image)->bounds.Height;

        *width = convert_unit(hdc, ((GpMetafile*)image)->unit) *
                        ((GpMetafile*)image)->bounds.Width;

        ReleaseDC(0, hdc);
    }

    else if(image->type == ImageTypeBitmap){
        *height = ((GpBitmap*)image)->height;
        *width = ((GpBitmap*)image)->width;
    }
    else{
        *height = ipicture_pixel_height(image->picture);
        *width = ipicture_pixel_width(image->picture);
    }

    TRACE("returning (%f, %f)\n", *height, *width);
    return Ok;
}

GpStatus WINGDIPAPI GdipGetImageGraphicsContext(GpImage *image,
    GpGraphics **graphics)
{
    HDC hdc;

    TRACE("%p %p\n", image, graphics);

    if(!image || !graphics)
        return InvalidParameter;

    if(image->type != ImageTypeBitmap){
        FIXME("not implemented for image type %d\n", image->type);
        return NotImplemented;
    }

    IPicture_get_CurDC(image->picture, &hdc);

    if(!hdc){
        hdc = CreateCompatibleDC(0);
        IPicture_SelectPicture(image->picture, hdc, NULL, NULL);
    }

    return GdipCreateFromHDC(hdc, graphics);
}

GpStatus WINGDIPAPI GdipGetImageHeight(GpImage *image, UINT *height)
{
    TRACE("%p %p\n", image, height);

    if(!image || !height)
        return InvalidParameter;

    if(image->type == ImageTypeMetafile){
        HDC hdc = GetDC(0);

        *height = roundr(convert_unit(hdc, ((GpMetafile*)image)->unit) *
                        ((GpMetafile*)image)->bounds.Height);

        ReleaseDC(0, hdc);
    }
    else if(image->type == ImageTypeBitmap)
        *height = ((GpBitmap*)image)->height;
    else
        *height = ipicture_pixel_height(image->picture);

    TRACE("returning %d\n", *height);

    return Ok;
}

GpStatus WINGDIPAPI GdipGetImageHorizontalResolution(GpImage *image, REAL *res)
{
    static int calls;

    if(!image || !res)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipGetImagePaletteSize(GpImage *image, INT *size)
{
    FIXME("%p %p\n", image, size);

    if(!image || !size)
        return InvalidParameter;

    return NotImplemented;
}

/* FIXME: test this function for non-bitmap types */
GpStatus WINGDIPAPI GdipGetImagePixelFormat(GpImage *image, PixelFormat *format)
{
    TRACE("%p %p\n", image, format);

    if(!image || !format)
        return InvalidParameter;

    if(image->type != ImageTypeBitmap)
        *format = PixelFormat24bppRGB;
    else
        *format = ((GpBitmap*) image)->format;

    return Ok;
}

GpStatus WINGDIPAPI GdipGetImageRawFormat(GpImage *image, GUID *format)
{
    static int calls;

    if(!image || !format)
        return InvalidParameter;

    if(!(calls++))
        FIXME("stub\n");

    /* FIXME: should be detected from embedded picture or stored separately */
    switch (image->type)
    {
    case ImageTypeBitmap:   *format = ImageFormatBMP; break;
    case ImageTypeMetafile: *format = ImageFormatEMF; break;
    default:
        WARN("unknown type %u\n", image->type);
        *format = ImageFormatUndefined;
    }
    return Ok;
}

GpStatus WINGDIPAPI GdipGetImageType(GpImage *image, ImageType *type)
{
    TRACE("%p %p\n", image, type);

    if(!image || !type)
        return InvalidParameter;

    *type = image->type;

    return Ok;
}

GpStatus WINGDIPAPI GdipGetImageVerticalResolution(GpImage *image, REAL *res)
{
    static int calls;

    if(!image || !res)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipGetImageWidth(GpImage *image, UINT *width)
{
    TRACE("%p %p\n", image, width);

    if(!image || !width)
        return InvalidParameter;

    if(image->type == ImageTypeMetafile){
        HDC hdc = GetDC(0);

        *width = roundr(convert_unit(hdc, ((GpMetafile*)image)->unit) *
                        ((GpMetafile*)image)->bounds.Width);

        ReleaseDC(0, hdc);
    }
    else if(image->type == ImageTypeBitmap)
        *width = ((GpBitmap*)image)->width;
    else
        *width = ipicture_pixel_width(image->picture);

    TRACE("returning %d\n", *width);

    return Ok;
}

GpStatus WINGDIPAPI GdipGetMetafileHeaderFromMetafile(GpMetafile * metafile,
    MetafileHeader * header)
{
    static int calls;

    if(!metafile || !header)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return Ok;
}

GpStatus WINGDIPAPI GdipGetAllPropertyItems(GpImage *image, UINT size,
    UINT num, PropertyItem* items)
{
    static int calls;

    if(!(calls++))
        FIXME("not implemented\n");

    return InvalidParameter;
}

GpStatus WINGDIPAPI GdipGetPropertyCount(GpImage *image, UINT* num)
{
    static int calls;

    if(!(calls++))
        FIXME("not implemented\n");

    return InvalidParameter;
}

GpStatus WINGDIPAPI GdipGetPropertyIdList(GpImage *image, UINT num, PROPID* list)
{
    static int calls;

    if(!(calls++))
        FIXME("not implemented\n");

    return InvalidParameter;
}

GpStatus WINGDIPAPI GdipGetPropertyItem(GpImage *image, PROPID id, UINT size,
    PropertyItem* buffer)
{
    static int calls;

    if(!(calls++))
        FIXME("not implemented\n");

    return InvalidParameter;
}

GpStatus WINGDIPAPI GdipGetPropertyItemSize(GpImage *image, PROPID pid,
    UINT* size)
{
    static int calls;

    TRACE("%p %x %p\n", image, pid, size);

    if(!size || !image)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipGetPropertySize(GpImage *image, UINT* size, UINT* num)
{
    static int calls;

    if(!(calls++))
        FIXME("not implemented\n");

    return InvalidParameter;
}

GpStatus WINGDIPAPI GdipImageGetFrameCount(GpImage *image,
    GDIPCONST GUID* dimensionID, UINT* count)
{
    static int calls;

    if(!image || !dimensionID || !count)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipImageGetFrameDimensionsCount(GpImage *image,
    UINT* count)
{
    if(!image || !count)
        return InvalidParameter;

    *count = 1;

    FIXME("stub\n");

    return Ok;
}

GpStatus WINGDIPAPI GdipImageGetFrameDimensionsList(GpImage* image,
    GUID* dimensionIDs, UINT count)
{
    static int calls;

    if(!image || !dimensionIDs)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return Ok;
}

GpStatus WINGDIPAPI GdipImageSelectActiveFrame(GpImage *image,
    GDIPCONST GUID* dimensionID, UINT frameidx)
{
    static int calls;

    if(!image || !dimensionID)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return Ok;
}

GpStatus WINGDIPAPI GdipLoadImageFromFile(GDIPCONST WCHAR* filename,
                                          GpImage **image)
{
    GpStatus stat;
    IStream *stream;

    TRACE("(%s) %p\n", debugstr_w(filename), image);

    if (!filename || !image)
        return InvalidParameter;

    stat = GdipCreateStreamOnFile(filename, GENERIC_READ, &stream);

    if (stat != Ok)
        return stat;

    stat = GdipLoadImageFromStream(stream, image);

    IStream_Release(stream);

    return stat;
}

/* FIXME: no icm handling */
GpStatus WINGDIPAPI GdipLoadImageFromFileICM(GDIPCONST WCHAR* filename,GpImage **image)
{
    TRACE("(%s) %p\n", debugstr_w(filename), image);

    return GdipLoadImageFromFile(filename, image);
}

static GpStatus decode_image_olepicture_icon(IStream* stream, REFCLSID clsid, GpImage **image)
{
    IPicture *pic;

    TRACE("%p %p\n", stream, image);

    if(!stream || !image)
        return InvalidParameter;

    if(OleLoadPicture(stream, 0, FALSE, &IID_IPicture,
        (LPVOID*) &pic) != S_OK){
        TRACE("Could not load picture\n");
        return GenericError;
    }

    *image = GdipAlloc(sizeof(GpImage));
    if(!*image) return OutOfMemory;
    (*image)->type = ImageTypeUnknown;
    (*image)->picture = pic;
    (*image)->flags   = ImageFlagsNone;

    return Ok;
}

static GpStatus decode_image_olepicture_bitmap(IStream* stream, REFCLSID clsid, GpImage **image)
{
    IPicture *pic;
    BITMAPINFO *pbmi;
    BITMAPCOREHEADER* bmch;
    HBITMAP hbm;
    HDC hdc;

    TRACE("%p %p\n", stream, image);

    if(!stream || !image)
        return InvalidParameter;

    if(OleLoadPicture(stream, 0, FALSE, &IID_IPicture,
        (LPVOID*) &pic) != S_OK){
        TRACE("Could not load picture\n");
        return GenericError;
    }

    pbmi = GdipAlloc(sizeof(BITMAPINFOHEADER) + 256 * sizeof(RGBQUAD));
    if (!pbmi)
        return OutOfMemory;
    *image = GdipAlloc(sizeof(GpBitmap));
    if(!*image){
        GdipFree(pbmi);
        return OutOfMemory;
    }
    (*image)->type = ImageTypeBitmap;

    (*((GpBitmap**) image))->width = ipicture_pixel_width(pic);
    (*((GpBitmap**) image))->height = ipicture_pixel_height(pic);

    /* get the pixel format */
    IPicture_get_Handle(pic, (OLE_HANDLE*)&hbm);
    IPicture_get_CurDC(pic, &hdc);

    (*((GpBitmap**) image))->hbitmap = hbm;

    bmch = (BITMAPCOREHEADER*) (&pbmi->bmiHeader);
    bmch->bcSize = sizeof(BITMAPCOREHEADER);

    if(!hdc){
        HBITMAP old;
        hdc = CreateCompatibleDC(0);
        old = SelectObject(hdc, hbm);
        GetDIBits(hdc, hbm, 0, 0, NULL, pbmi, DIB_RGB_COLORS);
        SelectObject(hdc, old);
        DeleteDC(hdc);
    }
    else
        GetDIBits(hdc, hbm, 0, 0, NULL, pbmi, DIB_RGB_COLORS);

    switch(bmch->bcBitCount)
    {
        case 1:
            (*((GpBitmap**) image))->format = PixelFormat1bppIndexed;
            break;
        case 4:
            (*((GpBitmap**) image))->format = PixelFormat4bppIndexed;
            break;
        case 8:
            (*((GpBitmap**) image))->format = PixelFormat8bppIndexed;
            break;
        case 16:
            (*((GpBitmap**) image))->format = PixelFormat16bppRGB565;
            break;
        case 24:
            (*((GpBitmap**) image))->format = PixelFormat24bppRGB;
            break;
        case 32:
            (*((GpBitmap**) image))->format = PixelFormat32bppRGB;
            break;
        case 48:
            (*((GpBitmap**) image))->format = PixelFormat48bppRGB;
            break;
        default:
            FIXME("Bit depth %d is not fully supported yet\n", bmch->bcBitCount);
            (*((GpBitmap**) image))->format = (bmch->bcBitCount << 8) | PixelFormatGDI;
            break;
    }

    GdipFree(pbmi);

    (*image)->picture = pic;
    (*image)->flags   = ImageFlagsNone;

    return Ok;
}

static GpStatus decode_image_olepicture_metafile(IStream* stream, REFCLSID clsid, GpImage **image)
{
    IPicture *pic;

    TRACE("%p %p\n", stream, image);

    if(!stream || !image)
        return InvalidParameter;

    if(OleLoadPicture(stream, 0, FALSE, &IID_IPicture,
        (LPVOID*) &pic) != S_OK){
        TRACE("Could not load picture\n");
        return GenericError;
    }

    /* FIXME: missing initialization code */
    *image = GdipAlloc(sizeof(GpMetafile));
    if(!*image) return OutOfMemory;
    (*image)->type = ImageTypeMetafile;
    (*image)->picture = pic;
    (*image)->flags   = ImageFlagsNone;

    return Ok;
}

typedef GpStatus (*encode_image_func)(LPVOID bitmap_bits, LPBITMAPINFO bitmap_info,
                                   void **output, unsigned int *output_size);

typedef GpStatus (*decode_image_func)(IStream *stream, REFCLSID clsid, GpImage** image);

typedef struct image_codec {
    ImageCodecInfo info;
    encode_image_func encode_func;
    decode_image_func decode_func;
} image_codec;

typedef enum {
    BMP,
    JPEG,
    GIF,
    EMF,
    WMF,
    PNG,
    ICO,
    NUM_CODECS
} ImageFormat;

static const struct image_codec codecs[NUM_CODECS];

static GpStatus get_decoder_info(IStream* stream, const struct image_codec **result)
{
    BYTE signature[8];
    LARGE_INTEGER seek;
    HRESULT hr;
    UINT bytesread;
    int i, j;

    /* seek to the start of the stream */
    seek.QuadPart = 0;
    hr = IStream_Seek(stream, seek, STREAM_SEEK_SET, NULL);
    if (FAILED(hr)) return hresult_to_status(hr);

    /* read the first 8 bytes */
    /* FIXME: This assumes all codecs have one signature <= 8 bytes in length */
    hr = IStream_Read(stream, signature, 8, &bytesread);
    if (FAILED(hr)) return hresult_to_status(hr);
    if (hr == S_FALSE || bytesread == 0) return GenericError;

    for (i = 0; i < NUM_CODECS; i++) {
        if ((codecs[i].info.Flags & ImageCodecFlagsDecoder) &&
            bytesread >= codecs[i].info.SigSize)
        {
            for (j=0; j<codecs[i].info.SigSize; j++)
                if ((signature[j] & codecs[i].info.SigMask[j]) != codecs[i].info.SigPattern[j])
                    break;
            if (j == codecs[i].info.SigSize)
            {
                *result = &codecs[i];
                return Ok;
            }
        }
    }

    TRACE("no match for %i byte signature %x %x %x %x %x %x %x %x\n", bytesread,
        signature[0],signature[1],signature[2],signature[3],
        signature[4],signature[5],signature[6],signature[7]);

    return GenericError;
}

GpStatus WINGDIPAPI GdipLoadImageFromStream(IStream* stream, GpImage **image)
{
    GpStatus stat;
    LARGE_INTEGER seek;
    HRESULT hr;
    const struct image_codec *codec=NULL;

    /* choose an appropriate image decoder */
    stat = get_decoder_info(stream, &codec);
    if (stat != Ok) return stat;

    /* seek to the start of the stream */
    seek.QuadPart = 0;
    hr = IStream_Seek(stream, seek, STREAM_SEEK_SET, NULL);
    if (FAILED(hr)) return hresult_to_status(hr);

    /* call on the image decoder to do the real work */
    return codec->decode_func(stream, &codec->info.Clsid, image);
}

/* FIXME: no ICM */
GpStatus WINGDIPAPI GdipLoadImageFromStreamICM(IStream* stream, GpImage **image)
{
    TRACE("%p %p\n", stream, image);

    return GdipLoadImageFromStream(stream, image);
}

GpStatus WINGDIPAPI GdipRemovePropertyItem(GpImage *image, PROPID propId)
{
    static int calls;

    if(!image)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipSetPropertyItem(GpImage *image, GDIPCONST PropertyItem* item)
{
    static int calls;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipSaveImageToFile(GpImage *image, GDIPCONST WCHAR* filename,
                                        GDIPCONST CLSID *clsidEncoder,
                                        GDIPCONST EncoderParameters *encoderParams)
{
    GpStatus stat;
    IStream *stream;

    TRACE("%p (%s) %p %p\n", image, debugstr_w(filename), clsidEncoder, encoderParams);

    if (!image || !filename|| !clsidEncoder)
        return InvalidParameter;

    stat = GdipCreateStreamOnFile(filename, GENERIC_WRITE, &stream);
    if (stat != Ok)
        return GenericError;

    stat = GdipSaveImageToStream(image, stream, clsidEncoder, encoderParams);

    IStream_Release(stream);
    return stat;
}

/*************************************************************************
 * Encoding functions -
 *   These functions encode an image in different image file formats.
 */
#define BITMAP_FORMAT_BMP   0x4d42 /* "BM" */
#define BITMAP_FORMAT_JPEG  0xd8ff
#define BITMAP_FORMAT_GIF   0x4947
#define BITMAP_FORMAT_PNG   0x5089
#define BITMAP_FORMAT_APM   0xcdd7

static GpStatus encode_image_BMP(LPVOID bitmap_bits, LPBITMAPINFO bitmap_info,
                                 void **output, unsigned int *output_size)
{
    int num_palette_entries;
    BITMAPFILEHEADER *bmp_file_hdr;
    BITMAPINFO *bmp_info_hdr;

    if (bitmap_info->bmiHeader.biClrUsed) {
        num_palette_entries = bitmap_info->bmiHeader.biClrUsed;
        if (num_palette_entries > 256) num_palette_entries = 256;
    } else {
        if (bitmap_info->bmiHeader.biBitCount <= 8)
            num_palette_entries = 1 << bitmap_info->bmiHeader.biBitCount;
        else
            num_palette_entries = 0;
    }

    *output_size =
        sizeof(BITMAPFILEHEADER) +
        sizeof(BITMAPINFOHEADER) +
        num_palette_entries * sizeof(RGBQUAD) +
        bitmap_info->bmiHeader.biSizeImage;

    *output = GdipAlloc(*output_size);

    bmp_file_hdr = *output;
    bmp_file_hdr->bfType = BITMAP_FORMAT_BMP;
    bmp_file_hdr->bfSize = *output_size;
    bmp_file_hdr->bfOffBits =
        sizeof(BITMAPFILEHEADER) +
        sizeof(BITMAPINFOHEADER) +
        num_palette_entries * sizeof (RGBQUAD);

    bmp_info_hdr = (BITMAPINFO*) ((unsigned char*)(*output) + sizeof(BITMAPFILEHEADER));
    memcpy(bmp_info_hdr, bitmap_info, sizeof(BITMAPINFOHEADER) + num_palette_entries * sizeof(RGBQUAD));
    memcpy((unsigned char *)(*output) +
           sizeof(BITMAPFILEHEADER) +
           sizeof(BITMAPINFOHEADER) +
           num_palette_entries * sizeof(RGBQUAD),
           bitmap_bits, bitmap_info->bmiHeader.biSizeImage);

    return Ok;
}

/*****************************************************************************
 * GdipSaveImageToStream [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipSaveImageToStream(GpImage *image, IStream* stream,
    GDIPCONST CLSID* clsid, GDIPCONST EncoderParameters* params)
{
    GpStatus stat;
    HRESULT hr;
    short type;
    HBITMAP hbmp;
    HBITMAP old_hbmp;
    HDC hdc;
    int bm_is_selected;
    BITMAPINFO bmp_info;
    LPVOID bmp_bits;
    encode_image_func encode_image;
    LPVOID output;
    unsigned int output_size;
    unsigned int dummy;
    int i;

    old_hbmp = 0;
    output = NULL;
    output_size = 0;

    TRACE("%p %p %p %p\n", image, stream, clsid, params);

    if(!image || !stream)
        return InvalidParameter;

    if (!image->picture)
        return GenericError;

    hr = IPicture_get_Type(image->picture, &type);
    if (FAILED(hr) || type != PICTYPE_BITMAP)
        return GenericError;

    /* select correct encoder */
    encode_image = NULL;
    for (i = 0; i < NUM_CODECS; i++) {
        if ((codecs[i].info.Flags & ImageCodecFlagsEncoder) &&
            IsEqualCLSID(clsid, &codecs[i].info.Clsid))
            encode_image = codecs[i].encode_func;
    }
    if (encode_image == NULL)
        return UnknownImageFormat;

    hbmp = ((GpBitmap*)image)->hbitmap;
    if (!hbmp)
        return GenericError;
    hr = IPicture_get_CurDC(image->picture, &hdc);
    if (FAILED(hr))
        return GenericError;
    bm_is_selected = (hdc != 0);
    if (!bm_is_selected) {
        hdc = CreateCompatibleDC(0);
        old_hbmp = SelectObject(hdc, hbmp);
    }

    /* get bits from HBITMAP */
    bmp_info.bmiHeader.biSize = sizeof(bmp_info.bmiHeader);
    bmp_info.bmiHeader.biBitCount = 0;
    GetDIBits(hdc, hbmp, 0, 0, NULL, &bmp_info, DIB_RGB_COLORS);

    bmp_bits = GdipAlloc(bmp_info.bmiHeader.biSizeImage);

    if (bmp_bits)
        GetDIBits(hdc, hbmp, 0, abs(bmp_info.bmiHeader.biHeight), bmp_bits, &bmp_info, DIB_RGB_COLORS);

    if (!bm_is_selected) {
        SelectObject(hdc, old_hbmp);
        DeleteDC(hdc);
    }

    if (!bmp_bits)
        return OutOfMemory;

    stat = encode_image(bmp_bits, &bmp_info, &output, &output_size);
    if (stat == Ok)
        IStream_Write(stream, output, output_size, &dummy);

    GdipFree(output);
    GdipFree(bmp_bits);

    return stat;
}

/*****************************************************************************
 * GdipGetImagePalette [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipGetImagePalette(GpImage *image, ColorPalette *palette, INT size)
{
    static int calls = 0;

    if(!image)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

/*****************************************************************************
 * GdipSetImagePalette [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipSetImagePalette(GpImage *image,
    GDIPCONST ColorPalette *palette)
{
    static int calls;

    if(!image || !palette)
        return InvalidParameter;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

/*************************************************************************
 * Encoders -
 *   Structures that represent which formats we support for encoding.
 */

/* ImageCodecInfo creation routines taken from libgdiplus */
static const WCHAR bmp_codecname[] = {'B', 'u', 'i','l', 't', '-','i', 'n', ' ', 'B', 'M', 'P', 0}; /* Built-in BMP */
static const WCHAR bmp_extension[] = {'*','.','B', 'M', 'P',';', '*','.', 'D','I', 'B',';', '*','.', 'R', 'L', 'E',0}; /* *.BMP;*.DIB;*.RLE */
static const WCHAR bmp_mimetype[] = {'i', 'm', 'a','g', 'e', '/', 'b', 'm', 'p', 0}; /* image/bmp */
static const WCHAR bmp_format[] = {'B', 'M', 'P', 0}; /* BMP */
static const BYTE bmp_sig_pattern[] = { 0x42, 0x4D };
static const BYTE bmp_sig_mask[] = { 0xFF, 0xFF };

static const WCHAR jpeg_codecname[] = {'B', 'u', 'i','l', 't', '-','i', 'n', ' ', 'J','P','E','G', 0};
static const WCHAR jpeg_extension[] = {'*','.','J','P','G',';', '*','.','J','P','E','G',';', '*','.','J','P','E',';', '*','.','J','F','I','F',0};
static const WCHAR jpeg_mimetype[] = {'i','m','a','g','e','/','j','p','e','g', 0};
static const WCHAR jpeg_format[] = {'J','P','E','G',0};
static const BYTE jpeg_sig_pattern[] = { 0xFF, 0xD8 };
static const BYTE jpeg_sig_mask[] = { 0xFF, 0xFF };

static const WCHAR gif_codecname[] = {'B', 'u', 'i','l', 't', '-','i', 'n', ' ', 'G','I','F', 0};
static const WCHAR gif_extension[] = {'*','.','G','I','F',0};
static const WCHAR gif_mimetype[] = {'i','m','a','g','e','/','g','i','f', 0};
static const WCHAR gif_format[] = {'G','I','F',0};
static const BYTE gif_sig_pattern[4] = "GIF8";
static const BYTE gif_sig_mask[] = { 0xFF, 0xFF, 0xFF, 0xFF };

static const WCHAR emf_codecname[] = {'B', 'u', 'i','l', 't', '-','i', 'n', ' ', 'E','M','F', 0};
static const WCHAR emf_extension[] = {'*','.','E','M','F',0};
static const WCHAR emf_mimetype[] = {'i','m','a','g','e','/','x','-','e','m','f', 0};
static const WCHAR emf_format[] = {'E','M','F',0};
static const BYTE emf_sig_pattern[] = { 0x01, 0x00, 0x00, 0x00 };
static const BYTE emf_sig_mask[] = { 0xFF, 0xFF, 0xFF, 0xFF };

static const WCHAR wmf_codecname[] = {'B', 'u', 'i','l', 't', '-','i', 'n', ' ', 'W','M','F', 0};
static const WCHAR wmf_extension[] = {'*','.','W','M','F',0};
static const WCHAR wmf_mimetype[] = {'i','m','a','g','e','/','x','-','w','m','f', 0};
static const WCHAR wmf_format[] = {'W','M','F',0};
static const BYTE wmf_sig_pattern[] = { 0xd7, 0xcd };
static const BYTE wmf_sig_mask[] = { 0xFF, 0xFF };

static const WCHAR png_codecname[] = {'B', 'u', 'i','l', 't', '-','i', 'n', ' ', 'P','N','G', 0};
static const WCHAR png_extension[] = {'*','.','P','N','G',0};
static const WCHAR png_mimetype[] = {'i','m','a','g','e','/','p','n','g', 0};
static const WCHAR png_format[] = {'P','N','G',0};
static const BYTE png_sig_pattern[] = { 137, 80, 78, 71, 13, 10, 26, 10, };
static const BYTE png_sig_mask[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };

static const WCHAR ico_codecname[] = {'B', 'u', 'i','l', 't', '-','i', 'n', ' ', 'I','C','O', 0};
static const WCHAR ico_extension[] = {'*','.','I','C','O',0};
static const WCHAR ico_mimetype[] = {'i','m','a','g','e','/','x','-','i','c','o','n', 0};
static const WCHAR ico_format[] = {'I','C','O',0};
static const BYTE ico_sig_pattern[] = { 0x00, 0x00, 0x01, 0x00 };
static const BYTE ico_sig_mask[] = { 0xFF, 0xFF, 0xFF, 0xFF };

static const struct image_codec codecs[NUM_CODECS] = {
    {
        { /* BMP */
            /* Clsid */              { 0x557cf400, 0x1a04, 0x11d3, { 0x9a, 0x73, 0x0, 0x0, 0xf8, 0x1e, 0xf3, 0x2e } },
            /* FormatID */           { 0xb96b3cabU, 0x0728U, 0x11d3U, {0x9d, 0x7b, 0x00, 0x00, 0xf8, 0x1e, 0xf3, 0x2e} },
            /* CodecName */          bmp_codecname,
            /* DllName */            NULL,
            /* FormatDescription */  bmp_format,
            /* FilenameExtension */  bmp_extension,
            /* MimeType */           bmp_mimetype,
            /* Flags */              ImageCodecFlagsEncoder | ImageCodecFlagsDecoder | ImageCodecFlagsSupportBitmap | ImageCodecFlagsBuiltin,
            /* Version */            1,
            /* SigCount */           1,
            /* SigSize */            2,
            /* SigPattern */         bmp_sig_pattern,
            /* SigMask */            bmp_sig_mask,
        },
        encode_image_BMP,
        decode_image_olepicture_bitmap
    },
    {
        { /* JPEG */
            /* Clsid */              { 0x557cf401, 0x1a04, 0x11d3, { 0x9a, 0x73, 0x0, 0x0, 0xf8, 0x1e, 0xf3, 0x2e } },
            /* FormatID */           { 0xb96b3caeU, 0x0728U, 0x11d3U, {0x9d, 0x7b, 0x00, 0x00, 0xf8, 0x1e, 0xf3, 0x2e} },
            /* CodecName */          jpeg_codecname,
            /* DllName */            NULL,
            /* FormatDescription */  jpeg_format,
            /* FilenameExtension */  jpeg_extension,
            /* MimeType */           jpeg_mimetype,
            /* Flags */              ImageCodecFlagsDecoder | ImageCodecFlagsSupportBitmap | ImageCodecFlagsBuiltin,
            /* Version */            1,
            /* SigCount */           1,
            /* SigSize */            2,
            /* SigPattern */         jpeg_sig_pattern,
            /* SigMask */            jpeg_sig_mask,
        },
        NULL,
        decode_image_olepicture_bitmap
    },
    {
        { /* GIF */
            /* Clsid */              { 0x557cf402, 0x1a04, 0x11d3, { 0x9a, 0x73, 0x0, 0x0, 0xf8, 0x1e, 0xf3, 0x2e } },
            /* FormatID */           { 0xb96b3cb0U, 0x0728U, 0x11d3U, {0x9d, 0x7b, 0x00, 0x00, 0xf8, 0x1e, 0xf3, 0x2e} },
            /* CodecName */          gif_codecname,
            /* DllName */            NULL,
            /* FormatDescription */  gif_format,
            /* FilenameExtension */  gif_extension,
            /* MimeType */           gif_mimetype,
            /* Flags */              ImageCodecFlagsDecoder | ImageCodecFlagsSupportBitmap | ImageCodecFlagsBuiltin,
            /* Version */            1,
            /* SigCount */           1,
            /* SigSize */            4,
            /* SigPattern */         gif_sig_pattern,
            /* SigMask */            gif_sig_mask,
        },
        NULL,
        decode_image_olepicture_bitmap
    },
    {
        { /* EMF */
            /* Clsid */              { 0x557cf403, 0x1a04, 0x11d3, { 0x9a, 0x73, 0x0, 0x0, 0xf8, 0x1e, 0xf3, 0x2e } },
            /* FormatID */           { 0xb96b3cacU, 0x0728U, 0x11d3U, {0x9d, 0x7b, 0x00, 0x00, 0xf8, 0x1e, 0xf3, 0x2e} },
            /* CodecName */          emf_codecname,
            /* DllName */            NULL,
            /* FormatDescription */  emf_format,
            /* FilenameExtension */  emf_extension,
            /* MimeType */           emf_mimetype,
            /* Flags */              ImageCodecFlagsDecoder | ImageCodecFlagsSupportVector | ImageCodecFlagsBuiltin,
            /* Version */            1,
            /* SigCount */           1,
            /* SigSize */            4,
            /* SigPattern */         emf_sig_pattern,
            /* SigMask */            emf_sig_mask,
        },
        NULL,
        decode_image_olepicture_metafile
    },
    {
        { /* WMF */
            /* Clsid */              { 0x557cf404, 0x1a04, 0x11d3, { 0x9a, 0x73, 0x0, 0x0, 0xf8, 0x1e, 0xf3, 0x2e } },
            /* FormatID */           { 0xb96b3cadU, 0x0728U, 0x11d3U, {0x9d, 0x7b, 0x00, 0x00, 0xf8, 0x1e, 0xf3, 0x2e} },
            /* CodecName */          wmf_codecname,
            /* DllName */            NULL,
            /* FormatDescription */  wmf_format,
            /* FilenameExtension */  wmf_extension,
            /* MimeType */           wmf_mimetype,
            /* Flags */              ImageCodecFlagsDecoder | ImageCodecFlagsSupportVector | ImageCodecFlagsBuiltin,
            /* Version */            1,
            /* SigCount */           1,
            /* SigSize */            2,
            /* SigPattern */         wmf_sig_pattern,
            /* SigMask */            wmf_sig_mask,
        },
        NULL,
        decode_image_olepicture_metafile
    },
    {
        { /* PNG */
            /* Clsid */              { 0x557cf406, 0x1a04, 0x11d3, { 0x9a, 0x73, 0x0, 0x0, 0xf8, 0x1e, 0xf3, 0x2e } },
            /* FormatID */           { 0xb96b3cafU, 0x0728U, 0x11d3U, {0x9d, 0x7b, 0x00, 0x00, 0xf8, 0x1e, 0xf3, 0x2e} },
            /* CodecName */          png_codecname,
            /* DllName */            NULL,
            /* FormatDescription */  png_format,
            /* FilenameExtension */  png_extension,
            /* MimeType */           png_mimetype,
            /* Flags */              ImageCodecFlagsDecoder | ImageCodecFlagsSupportBitmap | ImageCodecFlagsBuiltin,
            /* Version */            1,
            /* SigCount */           1,
            /* SigSize */            8,
            /* SigPattern */         png_sig_pattern,
            /* SigMask */            png_sig_mask,
        },
        NULL,
        decode_image_olepicture_bitmap
    },
    {
        { /* ICO */
            /* Clsid */              { 0x557cf407, 0x1a04, 0x11d3, { 0x9a, 0x73, 0x0, 0x0, 0xf8, 0x1e, 0xf3, 0x2e } },
            /* FormatID */           { 0xb96b3cabU, 0x0728U, 0x11d3U, {0x9d, 0x7b, 0x00, 0x00, 0xf8, 0x1e, 0xf3, 0x2e} },
            /* CodecName */          ico_codecname,
            /* DllName */            NULL,
            /* FormatDescription */  ico_format,
            /* FilenameExtension */  ico_extension,
            /* MimeType */           ico_mimetype,
            /* Flags */              ImageCodecFlagsDecoder | ImageCodecFlagsSupportBitmap | ImageCodecFlagsBuiltin,
            /* Version */            1,
            /* SigCount */           1,
            /* SigSize */            4,
            /* SigPattern */         ico_sig_pattern,
            /* SigMask */            ico_sig_mask,
        },
        NULL,
        decode_image_olepicture_icon
    },
};

/*****************************************************************************
 * GdipGetImageDecodersSize [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipGetImageDecodersSize(UINT *numDecoders, UINT *size)
{
    int decoder_count=0;
    int i;
    TRACE("%p %p\n", numDecoders, size);

    if (!numDecoders || !size)
        return InvalidParameter;

    for (i=0; i<NUM_CODECS; i++)
    {
        if (codecs[i].info.Flags & ImageCodecFlagsDecoder)
            decoder_count++;
    }

    *numDecoders = decoder_count;
    *size = decoder_count * sizeof(ImageCodecInfo);

    return Ok;
}

/*****************************************************************************
 * GdipGetImageDecoders [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipGetImageDecoders(UINT numDecoders, UINT size, ImageCodecInfo *decoders)
{
    int i, decoder_count=0;
    TRACE("%u %u %p\n", numDecoders, size, decoders);

    if (!decoders ||
        size != numDecoders * sizeof(ImageCodecInfo))
        return GenericError;

    for (i=0; i<NUM_CODECS; i++)
    {
        if (codecs[i].info.Flags & ImageCodecFlagsDecoder)
        {
            if (decoder_count == numDecoders) return GenericError;
            memcpy(&decoders[decoder_count], &codecs[i].info, sizeof(ImageCodecInfo));
            decoder_count++;
        }
    }

    if (decoder_count < numDecoders) return GenericError;

    return Ok;
}

/*****************************************************************************
 * GdipGetImageEncodersSize [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipGetImageEncodersSize(UINT *numEncoders, UINT *size)
{
    int encoder_count=0;
    int i;
    TRACE("%p %p\n", numEncoders, size);

    if (!numEncoders || !size)
        return InvalidParameter;

    for (i=0; i<NUM_CODECS; i++)
    {
        if (codecs[i].info.Flags & ImageCodecFlagsEncoder)
            encoder_count++;
    }

    *numEncoders = encoder_count;
    *size = encoder_count * sizeof(ImageCodecInfo);

    return Ok;
}

/*****************************************************************************
 * GdipGetImageEncoders [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipGetImageEncoders(UINT numEncoders, UINT size, ImageCodecInfo *encoders)
{
    int i, encoder_count=0;
    TRACE("%u %u %p\n", numEncoders, size, encoders);

    if (!encoders ||
        size != numEncoders * sizeof(ImageCodecInfo))
        return GenericError;

    for (i=0; i<NUM_CODECS; i++)
    {
        if (codecs[i].info.Flags & ImageCodecFlagsEncoder)
        {
            if (encoder_count == numEncoders) return GenericError;
            memcpy(&encoders[encoder_count], &codecs[i].info, sizeof(ImageCodecInfo));
            encoder_count++;
        }
    }

    if (encoder_count < numEncoders) return GenericError;

    return Ok;
}

/*****************************************************************************
 * GdipCreateBitmapFromHBITMAP [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipCreateBitmapFromHBITMAP(HBITMAP hbm, HPALETTE hpal, GpBitmap** bitmap)
{
    BITMAP bm;
    GpStatus retval;
    PixelFormat format;
    BYTE* bits;

    TRACE("%p %p %p\n", hbm, hpal, bitmap);

    if(!hbm || !bitmap)
        return InvalidParameter;

    /* TODO: Support for device-dependent bitmaps */
    if(hpal){
        FIXME("no support for device-dependent bitmaps\n");
        return NotImplemented;
    }

    if (GetObjectA(hbm, sizeof(bm), &bm) != sizeof(bm))
            return InvalidParameter;

    /* TODO: Figure out the correct format for 16, 32, 64 bpp */
    switch(bm.bmBitsPixel) {
        case 1:
            format = PixelFormat1bppIndexed;
            break;
        case 4:
            format = PixelFormat4bppIndexed;
            break;
        case 8:
            format = PixelFormat8bppIndexed;
            break;
        case 24:
            format = PixelFormat24bppRGB;
            break;
        case 32:
            format = PixelFormat32bppRGB;
            break;
        case 48:
            format = PixelFormat48bppRGB;
            break;
        default:
            FIXME("don't know how to handle %d bpp\n", bm.bmBitsPixel);
            return InvalidParameter;
    }

    if (bm.bmBits)
        bits = (BYTE*)bm.bmBits + (bm.bmHeight - 1) * bm.bmWidthBytes;
    else
    {
        FIXME("can only get image data from DIB sections\n");
        bits = NULL;
    }

    retval = GdipCreateBitmapFromScan0(bm.bmWidth, bm.bmHeight, -bm.bmWidthBytes,
        format, bits, bitmap);

    return retval;
}

GpStatus WINGDIPAPI GdipDeleteEffect(CGpEffect *effect)
{
    FIXME("(%p): stub\n", effect);
    /* note: According to Jose Roca's GDI+ Docs, this is not implemented
     * in Windows's gdiplus */
    return NotImplemented;
}

/*****************************************************************************
 * GdipSetEffectParameters [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipSetEffectParameters(CGpEffect *effect,
    const VOID *params, const UINT size)
{
    static int calls;

    if(!(calls++))
        FIXME("not implemented\n");

    return NotImplemented;
}

/*****************************************************************************
 * GdipGetImageFlags [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipGetImageFlags(GpImage *image, UINT *flags)
{
    TRACE("%p %p\n", image, flags);

    if(!image || !flags)
        return InvalidParameter;

    *flags = image->flags;

    return Ok;
}

GpStatus WINGDIPAPI GdipTestControl(GpTestControlEnum control, void *param)
{
    TRACE("(%d, %p)\n", control, param);

    switch(control){
        case TestControlForceBilinear:
            if(param)
                FIXME("TestControlForceBilinear not handled\n");
            break;
        case TestControlNoICM:
            if(param)
                FIXME("TestControlNoICM not handled\n");
            break;
        case TestControlGetBuildNumber:
            *((DWORD*)param) = 3102;
            break;
    }

    return Ok;
}

GpStatus WINGDIPAPI GdipRecordMetafileFileName(GDIPCONST WCHAR* fileName,
                            HDC hdc, EmfType type, GDIPCONST GpRectF *pFrameRect,
                            MetafileFrameUnit frameUnit, GDIPCONST WCHAR *desc,
                            GpMetafile **metafile)
{
    FIXME("%s %p %d %p %d %s %p stub!\n", debugstr_w(fileName), hdc, type, pFrameRect,
                                 frameUnit, debugstr_w(desc), metafile);

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipRecordMetafileFileNameI(GDIPCONST WCHAR* fileName, HDC hdc, EmfType type,
                            GDIPCONST GpRect *pFrameRect, MetafileFrameUnit frameUnit,
                            GDIPCONST WCHAR *desc, GpMetafile **metafile)
{
    FIXME("%s %p %d %p %d %s %p stub!\n", debugstr_w(fileName), hdc, type, pFrameRect,
                                 frameUnit, debugstr_w(desc), metafile);

    return NotImplemented;
}

GpStatus WINGDIPAPI GdipImageForceValidation(GpImage *image)
{
    FIXME("%p\n", image);

    return Ok;
}

/*****************************************************************************
 * GdipGetImageThumbnail [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipGetImageThumbnail(GpImage *image, UINT width, UINT height,
                            GpImage **ret_image, GetThumbnailImageAbort cb,
                            VOID * cb_data)
{
    FIXME("(%p %u %u %p %p %p) stub\n",
        image, width, height, ret_image, cb, cb_data);
    return NotImplemented;
}

/*****************************************************************************
 * GdipImageRotateFlip [GDIPLUS.@]
 */
GpStatus WINGDIPAPI GdipImageRotateFlip(GpImage *image, RotateFlipType type)
{
    FIXME("(%p %u) stub\n", image, type);
    return NotImplemented;
}