示例#1
0
BOOL DLL_CALLCONV
FreeImage_GetBackgroundColor(FIBITMAP *dib, RGBQUAD *bkcolor) {
	if(dib && bkcolor) {
		if(FreeImage_HasBackgroundColor(dib)) {
			// get the background color
			RGBQUAD *bkgnd_color = &((FREEIMAGEHEADER *)dib->data)->bkgnd_color;
			memcpy(bkcolor, bkgnd_color, sizeof(RGBQUAD));
			// get the background index
			if(FreeImage_GetBPP(dib) == 8) {
				RGBQUAD *pal = FreeImage_GetPalette(dib);
				for(unsigned i = 0; i < FreeImage_GetColorsUsed(dib); i++) {
					if(bkgnd_color->rgbRed == pal[i].rgbRed) {
						if(bkgnd_color->rgbGreen == pal[i].rgbGreen) {
							if(bkgnd_color->rgbBlue == pal[i].rgbBlue) {
								bkcolor->rgbReserved = i;
								return TRUE;
							}
						}
					}
				}
			}

			bkcolor->rgbReserved = 0;

			return TRUE;
		}
	}

	return FALSE;
}
示例#2
0
/**
@brief Composite a foreground image against a background color or a background image.

The equation for computing a composited sample value is:<br>
output = alpha * foreground + (1-alpha) * background<br>
where alpha and the input and output sample values are expressed as fractions in the range 0 to 1. 
For colour images, the computation is done separately for R, G, and B samples.

@param fg Foreground image
@param useFileBkg If TRUE and a file background is present, use it as the background color
@param appBkColor If not equal to NULL, and useFileBkg is FALSE, use this color as the background color
@param bg If not equal to NULL and useFileBkg is FALSE and appBkColor is NULL, use this as the background image
@return Returns the composite image if successful, returns NULL otherwise
@see FreeImage_IsTransparent, FreeImage_HasBackgroundColor
*/
FIBITMAP * DLL_CALLCONV
FreeImage_Composite(FIBITMAP *fg, BOOL useFileBkg, RGBQUAD *appBkColor, FIBITMAP *bg) {
	if(!FreeImage_HasPixels(fg)) return NULL;

	int width  = FreeImage_GetWidth(fg);
	int height = FreeImage_GetHeight(fg);
	int bpp    = FreeImage_GetBPP(fg);

	if((bpp != 8) && (bpp != 32))
		return NULL;

	if(bg) {
		int bg_width  = FreeImage_GetWidth(bg);
		int bg_height = FreeImage_GetHeight(bg);
		int bg_bpp    = FreeImage_GetBPP(bg);
		if((bg_width != width) || (bg_height != height) || (bg_bpp != 24))
			return NULL;
	}

	int bytespp = (bpp == 8) ? 1 : 4;

	
	int x, y, c;
	BYTE alpha = 0, not_alpha;
	BYTE index;
	RGBQUAD fgc;	// foreground color
	RGBQUAD bkc;	// background color

	memset(&fgc, 0, sizeof(RGBQUAD));
	memset(&bkc, 0, sizeof(RGBQUAD));

	// allocate the composite image
	FIBITMAP *composite = FreeImage_Allocate(width, height, 24, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
	if(!composite) return NULL;

	// get the palette
	RGBQUAD *pal = FreeImage_GetPalette(fg);

	// retrieve the alpha table from the foreground image
	BOOL bIsTransparent = FreeImage_IsTransparent(fg);
	BYTE *trns = FreeImage_GetTransparencyTable(fg);

	// retrieve the background color from the foreground image
	BOOL bHasBkColor = FALSE;

	if(useFileBkg && FreeImage_HasBackgroundColor(fg)) {
		FreeImage_GetBackgroundColor(fg, &bkc);
		bHasBkColor = TRUE;
	} else {
		// no file background color
		// use application background color ?
		if(appBkColor) {
			memcpy(&bkc, appBkColor, sizeof(RGBQUAD));
			bHasBkColor = TRUE;
		}
		// use background image ?
		else if(bg) {
			bHasBkColor = FALSE;
		}
	}

	for(y = 0; y < height; y++) {
		// foreground
		BYTE *fg_bits = FreeImage_GetScanLine(fg, y);
		// background
		BYTE *bg_bits = FreeImage_GetScanLine(bg, y);
		// composite image
		BYTE *cp_bits = FreeImage_GetScanLine(composite, y);

		for(x = 0; x < width; x++) {

			// foreground color + alpha

			if(bpp == 8) {
				// get the foreground color
				index = fg_bits[0];
				memcpy(&fgc, &pal[index], sizeof(RGBQUAD));
				// get the alpha
				if(bIsTransparent) {
					alpha = trns[index];
				} else {
					alpha = 255;
				}
			}
			else if(bpp == 32) {
				// get the foreground color
				fgc.rgbBlue  = fg_bits[FI_RGBA_BLUE];
				fgc.rgbGreen = fg_bits[FI_RGBA_GREEN];
				fgc.rgbRed   = fg_bits[FI_RGBA_RED];
				// get the alpha
				alpha = fg_bits[FI_RGBA_ALPHA];
			}

			// background color

			if(!bHasBkColor) {
				if(bg) {
					// get the background color from the background image
					bkc.rgbBlue  = bg_bits[FI_RGBA_BLUE];
					bkc.rgbGreen = bg_bits[FI_RGBA_GREEN];
					bkc.rgbRed   = bg_bits[FI_RGBA_RED];
				}
				else {
					// use a checkerboard pattern
					c = (((y & 0x8) == 0) ^ ((x & 0x8) == 0)) * 192;
					c = c ? c : 255;
					bkc.rgbBlue  = (BYTE)c;
					bkc.rgbGreen = (BYTE)c;
					bkc.rgbRed   = (BYTE)c;
				}
			}

			// composition

			if(alpha == 0) {
				// output = background
				cp_bits[FI_RGBA_BLUE] = bkc.rgbBlue;
				cp_bits[FI_RGBA_GREEN] = bkc.rgbGreen;
				cp_bits[FI_RGBA_RED] = bkc.rgbRed;
			}
			else if(alpha == 255) {
				// output = foreground
				cp_bits[FI_RGBA_BLUE] = fgc.rgbBlue;
				cp_bits[FI_RGBA_GREEN] = fgc.rgbGreen;
				cp_bits[FI_RGBA_RED] = fgc.rgbRed;
			}
			else {
				// output = alpha * foreground + (1-alpha) * background
				not_alpha = (BYTE)~alpha;
				cp_bits[FI_RGBA_BLUE] = (BYTE)((alpha * (WORD)fgc.rgbBlue  + not_alpha * (WORD)bkc.rgbBlue) >> 8);
				cp_bits[FI_RGBA_GREEN] = (BYTE)((alpha * (WORD)fgc.rgbGreen + not_alpha * (WORD)bkc.rgbGreen) >> 8);
				cp_bits[FI_RGBA_RED] = (BYTE)((alpha * (WORD)fgc.rgbRed   + not_alpha * (WORD)bkc.rgbRed) >> 8);
			}

			fg_bits += bytespp;
			bg_bits += 3;
			cp_bits += 3;
		}
	}

	// copy metadata from src to dst
	FreeImage_CloneMetadata(composite, fg);
	
	return composite;	
}
示例#3
0
static BOOL DLL_CALLCONV
Save(FreeImageIO *io, FIBITMAP *dib, fi_handle handle, int page, int flags, void *data) {
	png_structp png_ptr;
	png_infop info_ptr;
	png_colorp palette = NULL;
	png_uint_32 width, height;
	BOOL has_alpha_channel = FALSE;

	RGBQUAD *pal;					// pointer to dib palette
	int bit_depth, pixel_depth;		// pixel_depth = bit_depth * channels
	int palette_entries;
	int	interlace_type;

	fi_ioStructure fio;
    fio.s_handle = handle;
	fio.s_io = io;

	if ((dib) && (handle)) {
		try {
			// create the chunk manage structure

			png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, (png_voidp)NULL, error_handler, warning_handler);

			if (!png_ptr)  {
				return FALSE;
			}

			// allocate/initialize the image information data.

			info_ptr = png_create_info_struct(png_ptr);

			if (!info_ptr)  {
				png_destroy_write_struct(&png_ptr,  (png_infopp)NULL);
				return FALSE;
			}

			// Set error handling.  REQUIRED if you aren't supplying your own
			// error handling functions in the png_create_write_struct() call.

			if (setjmp(png_jmpbuf(png_ptr)))  {
				// if we get here, we had a problem reading the file

				png_destroy_write_struct(&png_ptr, &info_ptr);

				return FALSE;
			}

			// init the IO
            
			png_set_write_fn(png_ptr, &fio, _WriteProc, _FlushProc);

			// set physical resolution

			png_uint_32 res_x = (png_uint_32)FreeImage_GetDotsPerMeterX(dib);
			png_uint_32 res_y = (png_uint_32)FreeImage_GetDotsPerMeterY(dib);

			if ((res_x > 0) && (res_y > 0))  {
				png_set_pHYs(png_ptr, info_ptr, res_x, res_y, PNG_RESOLUTION_METER);
			}
	
			// Set the image information here.  Width and height are up to 2^31,
			// bit_depth is one of 1, 2, 4, 8, or 16, but valid values also depend on
			// the color_type selected. color_type is one of PNG_COLOR_TYPE_GRAY,
			// PNG_COLOR_TYPE_GRAY_ALPHA, PNG_COLOR_TYPE_PALETTE, PNG_COLOR_TYPE_RGB,
			// or PNG_COLOR_TYPE_RGB_ALPHA.  interlace is either PNG_INTERLACE_NONE or
			// PNG_INTERLACE_ADAM7, and the compression_type and filter_type MUST
			// currently be PNG_COMPRESSION_TYPE_BASE and PNG_FILTER_TYPE_BASE. REQUIRED

			width = FreeImage_GetWidth(dib);
			height = FreeImage_GetHeight(dib);
			pixel_depth = FreeImage_GetBPP(dib);

			BOOL bInterlaced = FALSE;
			if( (flags & PNG_INTERLACED) == PNG_INTERLACED) {
				interlace_type = PNG_INTERLACE_ADAM7;
				bInterlaced = TRUE;
			} else {
				interlace_type = PNG_INTERLACE_NONE;
			}

			// set the ZLIB compression level or default to PNG default compression level (ZLIB level = 6)
			int zlib_level = flags & 0x0F;
			if((zlib_level >= 1) && (zlib_level <= 9)) {
				png_set_compression_level(png_ptr, zlib_level);
			} else if((flags & PNG_Z_NO_COMPRESSION) == PNG_Z_NO_COMPRESSION) {
				png_set_compression_level(png_ptr, Z_NO_COMPRESSION);
			}

			// filtered strategy works better for high color images
			if(pixel_depth >= 16){
				png_set_compression_strategy(png_ptr, Z_FILTERED);
				png_set_filter(png_ptr, 0, PNG_FILTER_NONE|PNG_FILTER_SUB|PNG_FILTER_PAETH);
			} else {
				png_set_compression_strategy(png_ptr, Z_DEFAULT_STRATEGY);
			}

			FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
			if(image_type == FIT_BITMAP) {
				// standard image type
				bit_depth = (pixel_depth > 8) ? 8 : pixel_depth;
			} else {
				// 16-bit greyscale or 16-bit RGB(A)
				bit_depth = 16;
			}

			switch (FreeImage_GetColorType(dib)) {
				case FIC_MINISWHITE:
					// Invert monochrome files to have 0 as black and 1 as white (no break here)
					png_set_invert_mono(png_ptr);

				case FIC_MINISBLACK:
					png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, 
						PNG_COLOR_TYPE_GRAY, interlace_type, 
						PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);

					break;

				case FIC_PALETTE:
				{
					png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, 
						PNG_COLOR_TYPE_PALETTE, interlace_type, 
						PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);

					// set the palette

					palette_entries = 1 << bit_depth;
					palette = (png_colorp)png_malloc(png_ptr, palette_entries * sizeof (png_color));
					pal = FreeImage_GetPalette(dib);

					for (int i = 0; i < palette_entries; i++) {
						palette[i].red   = pal[i].rgbRed;
						palette[i].green = pal[i].rgbGreen;
						palette[i].blue  = pal[i].rgbBlue;
					}
					
					png_set_PLTE(png_ptr, info_ptr, palette, palette_entries);

					// You must not free palette here, because png_set_PLTE only makes a link to
					// the palette that you malloced.  Wait until you are about to destroy
					// the png structure.

					break;
				}

				case FIC_RGBALPHA :
					has_alpha_channel = TRUE;

					png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, 
						PNG_COLOR_TYPE_RGBA, interlace_type, 
						PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);

#if FREEIMAGE_COLORORDER == FREEIMAGE_COLORORDER_BGR
					// flip BGR pixels to RGB
					if(image_type == FIT_BITMAP) {
						png_set_bgr(png_ptr);
					}
#endif
					break;
	
				case FIC_RGB:
					png_set_IHDR(png_ptr, info_ptr, width, height, bit_depth, 
						PNG_COLOR_TYPE_RGB, interlace_type, 
						PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);

#if FREEIMAGE_COLORORDER == FREEIMAGE_COLORORDER_BGR
					// flip BGR pixels to RGB
					if(image_type == FIT_BITMAP) {
						png_set_bgr(png_ptr);
					}
#endif
					break;
					
				case FIC_CMYK:
					break;
			}

			// write possible ICC profile

			FIICCPROFILE *iccProfile = FreeImage_GetICCProfile(dib);
			if (iccProfile->size && iccProfile->data) {
				png_set_iCCP(png_ptr, info_ptr, "Embedded Profile", 0, (png_const_bytep)iccProfile->data, iccProfile->size);
			}

			// write metadata

			WriteMetadata(png_ptr, info_ptr, dib);

			// Optional gamma chunk is strongly suggested if you have any guess
			// as to the correct gamma of the image.
			// png_set_gAMA(png_ptr, info_ptr, gamma);

			// set the transparency table

			if (FreeImage_IsTransparent(dib) && (FreeImage_GetTransparencyCount(dib) > 0)) {
				png_set_tRNS(png_ptr, info_ptr, FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib), NULL);
			}

			// set the background color

			if(FreeImage_HasBackgroundColor(dib)) {
				png_color_16 image_background;
				RGBQUAD rgbBkColor;

				FreeImage_GetBackgroundColor(dib, &rgbBkColor);
				memset(&image_background, 0, sizeof(png_color_16));
				image_background.blue  = rgbBkColor.rgbBlue;
				image_background.green = rgbBkColor.rgbGreen;
				image_background.red   = rgbBkColor.rgbRed;
				image_background.index = rgbBkColor.rgbReserved;

				png_set_bKGD(png_ptr, info_ptr, &image_background);
			}
			
			// Write the file header information.

			png_write_info(png_ptr, info_ptr);

			// write out the image data

#ifndef FREEIMAGE_BIGENDIAN
			if (bit_depth == 16) {
				// turn on 16 bit byte swapping
				png_set_swap(png_ptr);
			}
#endif

			int number_passes = 1;
			if (bInterlaced) {
				number_passes = png_set_interlace_handling(png_ptr);
			}

			if ((pixel_depth == 32) && (!has_alpha_channel)) {
				BYTE *buffer = (BYTE *)malloc(width * 3);

				// transparent conversion to 24-bit
				// the number of passes is either 1 for non-interlaced images, or 7 for interlaced images
				for (int pass = 0; pass < number_passes; pass++) {
					for (png_uint_32 k = 0; k < height; k++) {
						FreeImage_ConvertLine32To24(buffer, FreeImage_GetScanLine(dib, height - k - 1), width);			
						png_write_row(png_ptr, buffer);
					}
				}
				free(buffer);
			} else {
				// the number of passes is either 1 for non-interlaced images, or 7 for interlaced images
				for (int pass = 0; pass < number_passes; pass++) {
					for (png_uint_32 k = 0; k < height; k++) {			
						png_write_row(png_ptr, FreeImage_GetScanLine(dib, height - k - 1));					
					}
				}
			}

			// It is REQUIRED to call this to finish writing the rest of the file
			// Bug with png_flush

			png_write_end(png_ptr, info_ptr);

			// clean up after the write, and free any memory allocated
			if (palette) {
				png_free(png_ptr, palette);
			}

			png_destroy_write_struct(&png_ptr, &info_ptr);

			return TRUE;
		} catch (const char *text) {
			FreeImage_OutputMessageProc(s_format_id, text);
		}
	}

	return FALSE;
}
示例#4
0
BOOL fipImage::hasFileBkColor() const {
	return FreeImage_HasBackgroundColor(_dib);
}
示例#5
0
void fipWinImage::drawEx(HDC hDC, RECT& rcDest, BOOL useFileBkg, RGBQUAD *appBkColor, FIBITMAP *bg) const {
	// Convert to a standard bitmap if needed
	if(_bHasChanged) {
		if(_bDeleteMe) {
			FreeImage_Unload(_display_dib);
			_display_dib = NULL;
			_bDeleteMe = FALSE;
		}

		FREE_IMAGE_TYPE image_type = getImageType();
		if(image_type == FIT_BITMAP) {
			BOOL bHasBackground = FreeImage_HasBackgroundColor(_dib);
			BOOL bIsTransparent = FreeImage_IsTransparent(_dib);

			if(!bIsTransparent && (!bHasBackground || !useFileBkg)) {
				// Copy pointer
				_display_dib = _dib;
			}
			else {
				// Create the transparent / alpha blended image
				_display_dib = FreeImage_Composite(_dib, useFileBkg, appBkColor, bg);
				if(_display_dib) {
					// Remember to delete _display_dib
					_bDeleteMe = TRUE;
				} else {
					// Something failed: copy pointers
					_display_dib = _dib;
				}
			}
		} else {
			// Convert to a standard dib for display

			if(image_type == FIT_COMPLEX) {
				// Convert to type FIT_DOUBLE
				FIBITMAP *dib_double = FreeImage_GetComplexChannel(_dib, FICC_MAG);
				// Convert to a standard bitmap (linear scaling)
				_display_dib = FreeImage_ConvertToStandardType(dib_double, TRUE);
				// Free image of type FIT_DOUBLE
				FreeImage_Unload(dib_double);
			} else if((image_type == FIT_RGBF) || (image_type == FIT_RGB16)) {
				// Apply a tone mapping algorithm and convert to 24-bit 
				_display_dib = FreeImage_ToneMapping(_dib, _tmo, _tmo_param_1, _tmo_param_2);
			} else if(image_type == FIT_RGBA16) {
				// Convert to 32-bit
				FIBITMAP *dib32 = FreeImage_ConvertTo32Bits(_dib);
				if(dib32) {
					// Create the transparent / alpha blended image
					_display_dib = FreeImage_Composite(dib32, useFileBkg, appBkColor, bg);
					FreeImage_Unload(dib32);
				}
			} else {
				// Other cases: convert to a standard bitmap (linear scaling)
				_display_dib = FreeImage_ConvertToStandardType(_dib, TRUE);
			}
			// Remember to delete _display_dib
			_bDeleteMe = TRUE;
		}

		_bHasChanged = FALSE;
	}

	// Draw the dib
	SetStretchBltMode(hDC, COLORONCOLOR);	
	StretchDIBits(hDC, rcDest.left, rcDest.top, 
		rcDest.right-rcDest.left, rcDest.bottom-rcDest.top, 
		0, 0, FreeImage_GetWidth(_display_dib), FreeImage_GetHeight(_display_dib),
		FreeImage_GetBits(_display_dib), FreeImage_GetInfo(_display_dib), DIB_RGB_COLORS, SRCCOPY);

}
示例#6
0
文件: fipImage.cpp 项目: BioKom/Fib
/**
 * @return if the picture has an background color, else false
 */
bool fipImage::hasFileBkColor() const{

	return FreeImage_HasBackgroundColor( pImageData );
}