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src/Source/FreeImage/BitmapAccess.cpp  view on Meta::CPAN

		if(dib_size == 0) {
			// memory allocation will fail (probably a malloc overflow)
			free(bitmap);
			return NULL;
		}

		bitmap->data = (BYTE *)FreeImage_Aligned_Malloc(dib_size * sizeof(BYTE), FIBITMAP_ALIGNMENT);

		if (bitmap->data != NULL) {
			memset(bitmap->data, 0, dib_size);

			// write out the FREEIMAGEHEADER

			FREEIMAGEHEADER *fih = (FREEIMAGEHEADER *)bitmap->data;

			fih->type = type;

			memset(&fih->bkgnd_color, 0, sizeof(RGBQUAD));

			fih->transparent = FALSE;
			fih->transparency_count = 0;
			memset(fih->transparent_table, 0xff, 256);

			fih->has_pixels = header_only ? FALSE : TRUE;

			// initialize FIICCPROFILE link

			FIICCPROFILE *iccProfile = FreeImage_GetICCProfile(bitmap);
			iccProfile->size = 0;
			iccProfile->data = 0;
			iccProfile->flags = 0;

			// initialize metadata models list

			fih->metadata = new(std::nothrow) METADATAMAP;

			// initialize attached thumbnail

			fih->thumbnail = NULL;

			// store a pointer to user provided pixel buffer (if any)

			fih->external_bits = ext_bits;
			fih->external_pitch = ext_pitch;

			// write out the BITMAPINFOHEADER

			BITMAPINFOHEADER *bih   = FreeImage_GetInfoHeader(bitmap);
			bih->biSize             = sizeof(BITMAPINFOHEADER);
			bih->biWidth            = width;
			bih->biHeight           = height;
			bih->biPlanes           = 1;
			bih->biCompression      = need_masks ? BI_BITFIELDS : BI_RGB;
			bih->biBitCount         = (WORD)bpp;
			bih->biClrUsed          = CalculateUsedPaletteEntries(bpp);
			bih->biClrImportant     = bih->biClrUsed;
			bih->biXPelsPerMeter	= 2835;	// 72 dpi
			bih->biYPelsPerMeter	= 2835;	// 72 dpi

			if(bpp == 8) {
				// build a default greyscale palette (very useful for image processing)
				RGBQUAD *pal = FreeImage_GetPalette(bitmap);
				for(int i = 0; i < 256; i++) {
					pal[i].rgbRed	= (BYTE)i;
					pal[i].rgbGreen = (BYTE)i;
					pal[i].rgbBlue	= (BYTE)i;
				}
			}

			// just setting the masks (only if needed) just like the palette.
			if (need_masks) {
				FREEIMAGERGBMASKS *masks = FreeImage_GetRGBMasks(bitmap);
				masks->red_mask = red_mask;
				masks->green_mask = green_mask;
				masks->blue_mask = blue_mask;
			}

			return bitmap;
		}

		free(bitmap);
	}

	return NULL;
}

FIBITMAP * DLL_CALLCONV
FreeImage_AllocateHeaderForBits(BYTE *ext_bits, unsigned ext_pitch, FREE_IMAGE_TYPE type, int width, int height, int bpp, unsigned red_mask, unsigned green_mask, unsigned blue_mask) {
	return FreeImage_AllocateBitmap(FALSE, ext_bits, ext_pitch, type, width, height, bpp, red_mask, green_mask, blue_mask);
}

FIBITMAP * DLL_CALLCONV
FreeImage_AllocateHeaderT(BOOL header_only, FREE_IMAGE_TYPE type, int width, int height, int bpp, unsigned red_mask, unsigned green_mask, unsigned blue_mask) {
	return FreeImage_AllocateBitmap(header_only, NULL, 0, type, width, height, bpp, red_mask, green_mask, blue_mask);
}

FIBITMAP * DLL_CALLCONV
FreeImage_AllocateHeader(BOOL header_only, int width, int height, int bpp, unsigned red_mask, unsigned green_mask, unsigned blue_mask) {
	return FreeImage_AllocateBitmap(header_only, NULL, 0, FIT_BITMAP, width, height, bpp, red_mask, green_mask, blue_mask);
}

FIBITMAP * DLL_CALLCONV
FreeImage_Allocate(int width, int height, int bpp, unsigned red_mask, unsigned green_mask, unsigned blue_mask) {
	return FreeImage_AllocateBitmap(FALSE, NULL, 0, FIT_BITMAP, width, height, bpp, red_mask, green_mask, blue_mask);
}

FIBITMAP * DLL_CALLCONV
FreeImage_AllocateT(FREE_IMAGE_TYPE type, int width, int height, int bpp, unsigned red_mask, unsigned green_mask, unsigned blue_mask) {
	return FreeImage_AllocateBitmap(FALSE, NULL, 0, type, width, height, bpp, red_mask, green_mask, blue_mask);
}

void DLL_CALLCONV
FreeImage_Unload(FIBITMAP *dib) {
	if (NULL != dib) {	
		if (NULL != dib->data) {
			// delete possible icc profile ...
			if (FreeImage_GetICCProfile(dib)->data) {
				free(FreeImage_GetICCProfile(dib)->data);
			}

			// delete metadata models