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