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#include "BMPLoader.h"
#include "api__bmp.h"
#include <wchar.h>
#include <bfc/platform/strcmp.h>
static bool StringEnds(const wchar_t *a, const wchar_t *b)
{
size_t aLen = wcslen(a);
size_t bLen = wcslen(b);
if (aLen < bLen) return false; // too short
return !_wcsicmp(a + aLen- bLen, b);
}
int BMPLoader::isMine(const wchar_t *filename)
{
return (filename && StringEnds(filename, L".BMP"));
}
const wchar_t *BMPLoader::mimeType()
{
return L"image/bmp";
}
int BMPLoader::getHeaderSize()
{
return 2;
}
int BMPLoader::testData(const void *data, int datalen)
{
if(datalen < 2) return 0;
return *((WORD*)data) == (WORD)'MB';
}
static void writeFile(const wchar_t *file, const void * data, int length) {
FILE *f = _wfopen(file,L"wb");
if(!f) return;
fwrite(data,length,1,f);
fclose(f);
}
ARGB32 *BMPLoader::loadImage(const void *data, int datalen, int *w, int *h, ifc_xmlreaderparams *params)
{
int w0=0,h0=0;
if(!w) w = &w0;
if(!h) h = &h0;
wchar_t file[MAX_PATH] = {0};
GetTempPath(MAX_PATH, file);
GetTempFileName(file,L"wa5bmp",0,file);
writeFile(file,data,datalen);
HBITMAP hbmp = (HBITMAP)LoadImage(0, file, IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE | LR_CREATEDIBSECTION);
_wunlink(file);
if(!hbmp) return 0;
BITMAP bm;
HDC hMemDC, hMemDC2;
HBITMAP hsrcdib;
void *srcdib;
BITMAPINFO srcbmi = {0, };
if(GetObject(hbmp, sizeof(BITMAP), &bm) == 0) { DeleteObject(hbmp); return 0; }
*w = bm.bmWidth;
*h = abs(bm.bmHeight);
ARGB32 *newbits=NULL;
srcbmi.bmiHeader.biSize = sizeof(srcbmi.bmiHeader);
srcbmi.bmiHeader.biWidth = *w;
srcbmi.bmiHeader.biHeight = -*h;
srcbmi.bmiHeader.biPlanes = 1;
srcbmi.bmiHeader.biBitCount = 32;
srcbmi.bmiHeader.biCompression = BI_RGB;
hMemDC = CreateCompatibleDC(NULL);
hMemDC2 = CreateCompatibleDC(NULL);
hsrcdib = CreateDIBSection(hMemDC, &srcbmi, DIB_RGB_COLORS, &srcdib, NULL, 0);
if(hsrcdib) {
HBITMAP hprev = (HBITMAP) SelectObject(hMemDC, hsrcdib);
HBITMAP hprev2 = (HBITMAP) SelectObject(hMemDC2, hbmp);
BitBlt(hMemDC, 0, 0, *w, *h, hMemDC2, 0, 0, SRCCOPY);
newbits = (ARGB32*)WASABI_API_MEMMGR->sysMalloc((*w) * (*h) * sizeof(ARGB32));
memcpy(newbits, srcdib, (*w)*(*h)*sizeof(ARGB32));
{
// put the alpha channel to 255
unsigned char *b = (unsigned char *)newbits;
int l = (*w) * (*h);
for (int i = 0;i < l;i++)
b[(i*4) + 3] = 0xff;
}
SelectObject(hMemDC, hprev);
SelectObject(hMemDC2, hprev2);
DeleteObject(hsrcdib);
}
DeleteDC(hMemDC2);
DeleteDC(hMemDC);
DeleteObject(hbmp);
return newbits;
}
#define CBCLASS BMPLoader
START_DISPATCH;
CB(ISMINE, isMine);
CB(MIMETYPE, mimeType);
CB(TESTDATA, testData);
CB(GETHEADERSIZE, getHeaderSize);
CB(GETDIMENSIONS, getDimensions);
CB(LOADIMAGE, loadImage);
CB(LOADIMAGEDATA, loadImageData);
END_DISPATCH;
#undef CBCLASS
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