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Sweden-Number/dlls/gdiplus/image.c

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/*
* 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>
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "wingdi.h"
#define COBJMACROS
#include "objbase.h"
#include "olectl.h"
#include "ole2.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 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;
}
/* 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);
OLE_HANDLE hbm;
HDC hdc;
HBITMAP old = NULL;
BITMAPINFO bmi;
BYTE *buff = NULL;
UINT abs_height;
TRACE("%p %p %d %d %p\n", bitmap, rect, flags, format, lockeddata);
if(!lockeddata || !bitmap || !rect)
return InvalidParameter;
if(rect->X < 0 || rect->Y < 0 || (rect->X + rect->Width > bitmap->width) ||
(rect->Y + rect->Height > bitmap->height) || !flags)
return InvalidParameter;
if(flags & ImageLockModeUserInputBuf)
return NotImplemented;
if(bitmap->lockmode)
return WrongState;
IPicture_get_Handle(bitmap->image.picture, &hbm);
IPicture_get_CurDC(bitmap->image.picture, &hdc);
bm_is_selected = (hdc != 0);
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biBitCount = 0;
if(!bm_is_selected){
hdc = CreateCompatibleDC(0);
old = SelectObject(hdc, (HBITMAP)hbm);
}
/* fill out bmi */
GetDIBits(hdc, (HBITMAP)hbm, 0, 0, NULL, &bmi, DIB_RGB_COLORS);
abs_height = abs(bmi.bmiHeader.biHeight);
stride = bmi.bmiHeader.biWidth * bitspp / 8;
stride = (stride + 3) & ~3;
buff = GdipAlloc(stride * abs_height);
bmi.bmiHeader.biBitCount = bitspp;
if(buff)
GetDIBits(hdc, (HBITMAP)hbm, 0, abs_height, buff, &bmi, DIB_RGB_COLORS);
if(!bm_is_selected){
SelectObject(hdc, old);
DeleteDC(hdc);
}
if(!buff)
return OutOfMemory;
lockeddata->Width = rect->Width;
lockeddata->Height = rect->Height;
lockeddata->PixelFormat = format;
lockeddata->Reserved = flags;
if(bmi.bmiHeader.biHeight > 0){
lockeddata->Stride = -stride;
lockeddata->Scan0 = buff + (bitspp / 8) * rect->X +
stride * (abs_height - 1 - rect->Y);
}
else{
lockeddata->Stride = stride;
lockeddata->Scan0 = buff + (bitspp / 8) * rect->X + stride * rect->Y;
}
bitmap->lockmode = flags;
bitmap->numlocks++;
bitmap->bitmapbits = buff;
return Ok;
}
GpStatus WINGDIPAPI GdipBitmapUnlockBits(GpBitmap* bitmap,
BitmapData* lockeddata)
{
OLE_HANDLE hbm;
HDC hdc;
HBITMAP old = NULL;
BOOL bm_is_selected;
BITMAPINFO bmi;
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;
}
IPicture_get_Handle(bitmap->image.picture, &hbm);
IPicture_get_CurDC(bitmap->image.picture, &hdc);
bm_is_selected = (hdc != 0);
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biBitCount = 0;
if(!bm_is_selected){
hdc = CreateCompatibleDC(0);
old = SelectObject(hdc, (HBITMAP)hbm);
}
GetDIBits(hdc, (HBITMAP)hbm, 0, 0, NULL, &bmi, DIB_RGB_COLORS);
bmi.bmiHeader.biBitCount = PIXELFORMATBPP(lockeddata->PixelFormat);
SetDIBits(hdc, (HBITMAP)hbm, 0, abs(bmi.bmiHeader.biHeight),
bitmap->bitmapbits, &bmi, DIB_RGB_COLORS);
if(!bm_is_selected){
SelectObject(hdc, old);
DeleteDC(hdc);
}
GdipFree(bitmap->bitmapbits);
bitmap->bitmapbits = NULL;
bitmap->lockmode = 0;
return Ok;
}
GpStatus WINGDIPAPI GdipCreateBitmapFromFile(GDIPCONST WCHAR* filename,
GpBitmap **bitmap)
{
GpStatus stat;
IStream *stream;
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;
}
/* FIXME: no icm */
GpStatus WINGDIPAPI GdipCreateBitmapFromFileICM(GDIPCONST WCHAR* filename,
GpBitmap **bitmap)
{
return GdipCreateBitmapFromFile(filename, bitmap);
}
GpStatus WINGDIPAPI GdipCreateHBITMAPFromBitmap(GpBitmap* bitmap,
HBITMAP* hbmReturn, ARGB background)
{
FIXME("stub\n");
hbmReturn = NULL;
return NotImplemented;
}
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 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 || width <= 0 || height <= 0 || (scan0 && (stride % 4))){
*bitmap = NULL;
return InvalidParameter;
}
if(scan0 && !stride)
return InvalidParameter;
/* FIXME: windows allows negative stride (reads backwards from scan0) */
if(stride < 0){
FIXME("negative stride\n");
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;
bmih->biHeight = -height;
/* FIXME: use the rest of the data from format */
bmih->biBitCount = PIXELFORMATBPP(format);
bmih->biCompression = BI_RGB;
bmih->biSizeImage = datalen;
if(scan0)
memcpy(bmih + 1, scan0, datalen);
else
memset(bmih + 1, 0, datalen);
if(CreateStreamOnHGlobal(buff, TRUE, &stream) != S_OK){
ERR("could not make stream\n");
GdipFree(*bitmap);
GdipFree(buff);
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);
return GenericError;
}
(*bitmap)->image.type = ImageTypeBitmap;
(*bitmap)->width = width;
(*bitmap)->height = height;
(*bitmap)->format = format;
return Ok;
}
GpStatus WINGDIPAPI GdipCreateBitmapFromStream(IStream* stream,
GpBitmap **bitmap)
{
GpStatus stat;
stat = GdipLoadImageFromStream(stream, (GpImage**) bitmap);
if(stat != Ok)
return stat;
if((*bitmap)->image.type != ImageTypeBitmap){
IPicture_Release((*bitmap)->image.picture);
GdipFree(bitmap);
return GenericError; /* FIXME: what error to return? */
}
return Ok;
}
/* FIXME: no icm */
GpStatus WINGDIPAPI GdipCreateBitmapFromStreamICM(IStream* stream,
GpBitmap **bitmap)
{
return GdipCreateBitmapFromStream(stream, bitmap);
}
GpStatus WINGDIPAPI GdipDisposeImage(GpImage *image)
{
HDC hdc;
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)
{
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)
{
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;
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)
{
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;
}
/* FIXME: test this function for non-bitmap types */
GpStatus WINGDIPAPI GdipGetImagePixelFormat(GpImage *image, PixelFormat *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("not implemented\n");
return NotImplemented;
}
GpStatus WINGDIPAPI GdipGetImageType(GpImage *image, ImageType *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)
{
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 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 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 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;
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;
}
GpStatus WINGDIPAPI GdipLoadImageFromStream(IStream* stream, GpImage **image)
{
IPicture *pic;
short type;
if(!stream || !image)
return InvalidParameter;
if(OleLoadPicture(stream, 0, FALSE, &IID_IPicture,
(LPVOID*) &pic) != S_OK){
TRACE("Could not load picture\n");
return GenericError;
}
IPicture_get_Type(pic, &type);
if(type == PICTYPE_BITMAP){
BITMAPINFO bmi;
BITMAPCOREHEADER* bmch;
OLE_HANDLE hbm;
HDC hdc;
*image = GdipAlloc(sizeof(GpBitmap));
if(!*image) 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, &hbm);
IPicture_get_CurDC(pic, &hdc);
bmch = (BITMAPCOREHEADER*) (&bmi.bmiHeader);
bmch->bcSize = sizeof(BITMAPCOREHEADER);
if(!hdc){
HBITMAP old;
hdc = CreateCompatibleDC(0);
old = SelectObject(hdc, (HBITMAP)hbm);
GetDIBits(hdc, (HBITMAP)hbm, 0, 0, NULL, &bmi, DIB_RGB_COLORS);
SelectObject(hdc, old);
DeleteDC(hdc);
}
else
GetDIBits(hdc, (HBITMAP)hbm, 0, 0, NULL, &bmi, DIB_RGB_COLORS);
(*((GpBitmap**) image))->format = (bmch->bcBitCount << 8) | PixelFormatGDI;
}
else if(type == PICTYPE_METAFILE || type == PICTYPE_ENHMETAFILE){
/* FIXME: missing initialization code */
*image = GdipAlloc(sizeof(GpMetafile));
if(!*image) return OutOfMemory;
(*image)->type = ImageTypeMetafile;
}
else{
*image = GdipAlloc(sizeof(GpImage));
if(!*image) return OutOfMemory;
(*image)->type = ImageTypeUnknown;
}
(*image)->picture = pic;
return Ok;
}
/* FIXME: no ICM */
GpStatus WINGDIPAPI GdipLoadImageFromStreamICM(IStream* stream, GpImage **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 GdipSaveImageToFile(GpImage *image, GDIPCONST WCHAR* filename,
GDIPCONST CLSID *clsidEncoder,
GDIPCONST EncoderParameters *encoderParams)
{
GpStatus stat;
IStream *stream;
if (!image || !filename|| !clsidEncoder)
return InvalidParameter;
if (!(image->picture))
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 = (BITMAPFILEHEADER*) *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;
}
typedef GpStatus encode_image_func(LPVOID bitmap_bits, LPBITMAPINFO bitmap_info,
void **output, unsigned int *output_size);
typedef enum {
BMP,
NUM_ENCODERS_SUPPORTED
} ImageFormat;
static const ImageCodecInfo codecs[NUM_ENCODERS_SUPPORTED];
static encode_image_func *const encode_image_funcs[NUM_ENCODERS_SUPPORTED] = {
encode_image_BMP,
};
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;
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_ENCODERS_SUPPORTED; i++) {
if (IsEqualCLSID(clsid, &codecs[i].Clsid))
encode_image = encode_image_funcs[i];
}
if (encode_image == NULL)
return UnknownImageFormat;
/* extract underlying hbitmap representation from the IPicture */
hr = IPicture_get_Handle(image->picture, (OLE_HANDLE*)&hbmp);
if (FAILED(hr) || !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;
}
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 ImageCodecInfo codecs[NUM_ENCODERS_SUPPORTED] =
{
{ /* 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,
},
};
GpStatus WINGDIPAPI GdipGetImageEncodersSize(UINT *numEncoders, UINT *size)
{
if (!numEncoders || !size)
return InvalidParameter;
*numEncoders = NUM_ENCODERS_SUPPORTED;
*size = sizeof (codecs);
return Ok;
}
GpStatus WINGDIPAPI GdipGetImageEncoders(UINT numEncoders, UINT size, ImageCodecInfo *encoders)
{
if (!encoders ||
(numEncoders != NUM_ENCODERS_SUPPORTED) ||
(size != sizeof (codecs)))
return GenericError;
memcpy(encoders, codecs, sizeof (codecs));
return Ok;
}
GpStatus WINGDIPAPI GdipCreateBitmapFromHBITMAP(HBITMAP hbm, HPALETTE hpal, GpBitmap** bitmap)
{
BITMAP bm;
GpStatus retval;
PixelFormat format;
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 48:
format = PixelFormat48bppRGB;
break;
default:
FIXME("don't know how to handle %d bpp\n", bm.bmBitsPixel);
return InvalidParameter;
}
retval = GdipCreateBitmapFromScan0(bm.bmWidth, bm.bmHeight, bm.bmWidthBytes,
format, bm.bmBits, bitmap);
return retval;
}
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