Initial community commit

Src/bmp/BMPLoader.cpp

@@ -0,0 +1,113 @@
+#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