reactos/rosapps/smartpdf/baseutils/win_image.cpp
Daniel Reimer a7fddf9c07 Delete all Trailing spaces in code.
svn path=/trunk/; revision=29689
2007-10-19 23:05:02 +00:00

140 lines
2.9 KiB
C++

/* Written by Krzysztof Kowalczyk (http://blog.kowalczyk.info)
The author disclaims copyright to this source code. */
#include "base_util.h"
#include "win_image.h"
#define INITGUID
#include <initguid.h>
#include <Imaging.h>
#pragma comment(lib, "imaging")
/* TODO: those only work on wince 5.0 so we should have fallback for
earlier versions */
struct win_image {
IImage * image;
int dx;
int dy;
};
win_image *win_image_from_file(const TCHAR *file_path)
{
IImagingFactory* imageFactory;
ImageInfo info;
win_image * img = NULL;
img = SAZ(win_image);
if (!img)
return NULL;
CoInitializeEx(NULL, COINIT_MULTITHREADED);
HRESULT hr = CoCreateInstance (CLSID_ImagingFactory, NULL, CLSCTX_INPROC_SERVER,
IID_IImagingFactory, (LPVOID*)&imageFactory);
if (FAILED(hr))
goto Error;
hr = imageFactory->CreateImageFromFile(file_path, &img->image);
imageFactory->Release();
if (FAILED(hr))
goto Error;
img->image->GetImageInfo(&info);
img->dx = info.Width;
img->dy = info.Height;
return img;
Error:
win_image_delete(img);
return NULL;
}
win_image * win_image_from_buffer(void *buf, UINT buf_size)
{
IImagingFactory* imageFactory;
ImageInfo info;
win_image * img = NULL;
img = SAZ(win_image);
if (!img)
return NULL;
CoInitializeEx(NULL, COINIT_MULTITHREADED);
HRESULT hr = CoCreateInstance (CLSID_ImagingFactory, NULL, CLSCTX_INPROC_SERVER,
IID_IImagingFactory, (LPVOID*)&imageFactory);
if (FAILED(hr))
goto Error;
hr = imageFactory->CreateImageFromBuffer(buf, buf_size, BufferDisposalFlagNone, &img->image);
imageFactory->Release();
if (FAILED(hr))
goto Error;
img->image->GetImageInfo(&info);
img->dx = info.Width;
img->dy = info.Height;
return img;
Error:
win_image_delete(img);
return NULL;
}
win_image *win_image_from_resource(HMODULE hinst, int resource_id)
{
HRSRC hres;
void * buf;
DWORD res_size;
HGLOBAL hdata;
hres = FindResource(hinst, MAKEINTRESOURCE(resource_id), RT_RCDATA);
if (!hres)
return NULL;
res_size = SizeofResource(hinst, hres);
if (0 == res_size)
return NULL;
hdata = LoadResource(hinst, hres);
if (!hdata)
return NULL;
buf = (void*)LockResource(hdata);
if (!buf)
return NULL;
return win_image_from_buffer(buf, (UINT)res_size);
}
void win_image_delete(win_image *img)
{
assert(img);
if (!img)
return;
if (img->image)
img->image->Release();
free(img);
}
void win_image_blit_at(win_image *img, HDC dc, int x, int y)
{
RECT r = {0};
assert(img);
if (!img)
return;
assert(img->image);
if (!img->image)
return;
r.left = x;
r.right = x + img->dx;
r.top = y;
r.bottom = y + img->dy;
img->image->Draw(dc, &r, NULL);
}