/src/FreeImage/Source/FreeImage/Conversion32.cpp
https://bitbucket.org/cabalistic/ogredeps/ · C++ · 345 lines · 246 code · 52 blank · 47 comment · 64 complexity · e3d1c136c9f4b98fb66ad5e21a65081a MD5 · raw file
- // ==========================================================
- // Bitmap conversion routines
- //
- // Design and implementation by
- // - Floris van den Berg (flvdberg@wxs.nl)
- // - Hervé Drolon (drolon@infonie.fr)
- // - Jani Kajala (janik@remedy.fi)
- // - Detlev Vendt (detlev.vendt@brillit.de)
- //
- // This file is part of FreeImage 3
- //
- // COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
- // OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
- // THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
- // OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
- // CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
- // THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
- // SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
- // PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
- // THIS DISCLAIMER.
- //
- // Use at your own risk!
- // ==========================================================
- #include "FreeImage.h"
- #include "Utilities.h"
- // ----------------------------------------------------------
- // internal conversions X to 32 bits
- // ----------------------------------------------------------
- void DLL_CALLCONV
- FreeImage_ConvertLine1To32(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
- for (int cols = 0; cols < width_in_pixels; cols++) {
- int index = (source[cols>>3] & (0x80 >> (cols & 0x07))) != 0 ? 1 : 0;
- target[FI_RGBA_BLUE] = palette[index].rgbBlue;
- target[FI_RGBA_GREEN] = palette[index].rgbGreen;
- target[FI_RGBA_RED] = palette[index].rgbRed;
- target[FI_RGBA_ALPHA] = 0xFF;
- target += 4;
- }
- }
- void DLL_CALLCONV
- FreeImage_ConvertLine4To32(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
- BOOL low_nibble = FALSE;
- int x = 0;
- for (int cols = 0 ; cols < width_in_pixels ; ++cols) {
- if (low_nibble) {
- target[FI_RGBA_BLUE] = palette[LOWNIBBLE(source[x])].rgbBlue;
- target[FI_RGBA_GREEN] = palette[LOWNIBBLE(source[x])].rgbGreen;
- target[FI_RGBA_RED] = palette[LOWNIBBLE(source[x])].rgbRed;
- x++;
- } else {
- target[FI_RGBA_BLUE] = palette[HINIBBLE(source[x]) >> 4].rgbBlue;
- target[FI_RGBA_GREEN] = palette[HINIBBLE(source[x]) >> 4].rgbGreen;
- target[FI_RGBA_RED] = palette[HINIBBLE(source[x]) >> 4].rgbRed;
- }
- low_nibble = !low_nibble;
- target[FI_RGBA_ALPHA] = 0xFF;
- target += 4;
- }
- }
- void DLL_CALLCONV
- FreeImage_ConvertLine8To32(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
- for (int cols = 0; cols < width_in_pixels; cols++) {
- target[FI_RGBA_BLUE] = palette[source[cols]].rgbBlue;
- target[FI_RGBA_GREEN] = palette[source[cols]].rgbGreen;
- target[FI_RGBA_RED] = palette[source[cols]].rgbRed;
- target[FI_RGBA_ALPHA] = 0xFF;
- target += 4;
- }
- }
- void DLL_CALLCONV
- FreeImage_ConvertLine16To32_555(BYTE *target, BYTE *source, int width_in_pixels) {
- WORD *bits = (WORD *)source;
- for (int cols = 0; cols < width_in_pixels; cols++) {
- target[FI_RGBA_RED] = (BYTE)((((bits[cols] & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F);
- target[FI_RGBA_GREEN] = (BYTE)((((bits[cols] & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F);
- target[FI_RGBA_BLUE] = (BYTE)((((bits[cols] & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F);
- target[FI_RGBA_ALPHA] = 0xFF;
- target += 4;
- }
- }
- void DLL_CALLCONV
- FreeImage_ConvertLine16To32_565(BYTE *target, BYTE *source, int width_in_pixels) {
- WORD *bits = (WORD *)source;
- for (int cols = 0; cols < width_in_pixels; cols++) {
- target[FI_RGBA_RED] = (BYTE)((((bits[cols] & FI16_565_RED_MASK) >> FI16_565_RED_SHIFT) * 0xFF) / 0x1F);
- target[FI_RGBA_GREEN] = (BYTE)((((bits[cols] & FI16_565_GREEN_MASK) >> FI16_565_GREEN_SHIFT) * 0xFF) / 0x3F);
- target[FI_RGBA_BLUE] = (BYTE)((((bits[cols] & FI16_565_BLUE_MASK) >> FI16_565_BLUE_SHIFT) * 0xFF) / 0x1F);
- target[FI_RGBA_ALPHA] = 0xFF;
- target += 4;
- }
- }
- /*
- void DLL_CALLCONV
- FreeImage_ConvertLine24To32(BYTE *target, BYTE *source, int width_in_pixels) {
- for (int cols = 0; cols < width_in_pixels; cols++) {
- *(DWORD *)target = (*(DWORD *) source & FI_RGBA_RGB_MASK) | FI_RGBA_ALPHA_MASK;
- target += 4;
- source += 3;
- }
- }
- */
- /**
- This unoptimized version of the conversion function avoid an undetermined bug with VC++ SP6.
- The bug occurs in release mode only, when the image height is equal to 537
- (try e.g. a size of 432x537 to reproduce the bug with the optimized function).
- */
- void DLL_CALLCONV
- FreeImage_ConvertLine24To32(BYTE *target, BYTE *source, int width_in_pixels) {
- for (int cols = 0; cols < width_in_pixels; cols++) {
- target[FI_RGBA_RED] = source[FI_RGBA_RED];
- target[FI_RGBA_GREEN] = source[FI_RGBA_GREEN];
- target[FI_RGBA_BLUE] = source[FI_RGBA_BLUE];
- target[FI_RGBA_ALPHA] = 0xFF;
- target += 4;
- source += 3;
- }
- }
- // ----------------------------------------------------------
- inline void
- FreeImage_ConvertLine1To32MapTransparency(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette, BYTE *table, int transparent_pixels) {
- for (int cols = 0; cols < width_in_pixels; cols++) {
- int index = (source[cols>>3] & (0x80 >> (cols & 0x07))) != 0 ? 1 : 0;
- target[FI_RGBA_BLUE] = palette[index].rgbBlue;
- target[FI_RGBA_GREEN] = palette[index].rgbGreen;
- target[FI_RGBA_RED] = palette[index].rgbRed;
- target[FI_RGBA_ALPHA] = (index < transparent_pixels) ? table[index] : 255;
- target += 4;
- }
- }
- inline void
- FreeImage_ConvertLine4To32MapTransparency(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette, BYTE *table, int transparent_pixels) {
- BOOL low_nibble = FALSE;
- int x = 0;
- for (int cols = 0 ; cols < width_in_pixels ; ++cols) {
- if (low_nibble) {
- target[FI_RGBA_BLUE] = palette[LOWNIBBLE(source[x])].rgbBlue;
- target[FI_RGBA_GREEN] = palette[LOWNIBBLE(source[x])].rgbGreen;
- target[FI_RGBA_RED] = palette[LOWNIBBLE(source[x])].rgbRed;
- target[FI_RGBA_ALPHA] = (LOWNIBBLE(source[x]) < transparent_pixels) ? table[LOWNIBBLE(source[x])] : 255;
- x++;
- } else {
- target[FI_RGBA_BLUE] = palette[HINIBBLE(source[x]) >> 4].rgbBlue;
- target[FI_RGBA_GREEN] = palette[HINIBBLE(source[x]) >> 4].rgbGreen;
- target[FI_RGBA_RED] = palette[HINIBBLE(source[x]) >> 4].rgbRed;
- target[FI_RGBA_ALPHA] = (HINIBBLE(source[x] >> 4) < transparent_pixels) ? table[HINIBBLE(source[x]) >> 4] : 255;
- }
- low_nibble = !low_nibble;
-
- target += 4;
- }
- }
- inline void
- FreeImage_ConvertLine8To32MapTransparency(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette, BYTE *table, int transparent_pixels) {
- for (int cols = 0; cols < width_in_pixels; cols++) {
- target[FI_RGBA_BLUE] = palette[source[cols]].rgbBlue;
- target[FI_RGBA_GREEN] = palette[source[cols]].rgbGreen;
- target[FI_RGBA_RED] = palette[source[cols]].rgbRed;
- target[FI_RGBA_ALPHA] = (source[cols] < transparent_pixels) ? table[source[cols]] : 255;
- target += 4;
- }
- }
- // ----------------------------------------------------------
- FIBITMAP * DLL_CALLCONV
- FreeImage_ConvertTo32Bits(FIBITMAP *dib) {
- if(!FreeImage_HasPixels(dib)) return NULL;
- const int bpp = FreeImage_GetBPP(dib);
- const FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
-
- if((image_type != FIT_BITMAP) && (image_type != FIT_RGB16) && (image_type != FIT_RGBA16)) {
- return NULL;
- }
-
- const int width = FreeImage_GetWidth(dib);
- const int height = FreeImage_GetHeight(dib);
- if(image_type == FIT_BITMAP) {
- if(bpp == 32) {
- return FreeImage_Clone(dib);
- }
- FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
- if(new_dib == NULL) {
- return NULL;
- }
- // copy metadata from src to dst
- FreeImage_CloneMetadata(new_dib, dib);
- BOOL bIsTransparent = FreeImage_IsTransparent(dib);
- switch(bpp) {
- case 1:
- {
- if(bIsTransparent) {
- for (int rows = 0; rows < height; rows++) {
- FreeImage_ConvertLine1To32MapTransparency(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib));
- }
- } else {
- for (int rows = 0; rows < height; rows++) {
- FreeImage_ConvertLine1To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
- }
- }
- return new_dib;
- }
- case 4:
- {
- if(bIsTransparent) {
- for (int rows = 0; rows < height; rows++) {
- FreeImage_ConvertLine4To32MapTransparency(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib));
- }
- } else {
- for (int rows = 0; rows < height; rows++) {
- FreeImage_ConvertLine4To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
- }
- }
- return new_dib;
- }
-
- case 8:
- {
- if(bIsTransparent) {
- for (int rows = 0; rows < height; rows++) {
- FreeImage_ConvertLine8To32MapTransparency(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib));
- }
- } else {
- for (int rows = 0; rows < height; rows++) {
- FreeImage_ConvertLine8To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
- }
- }
- return new_dib;
- }
- case 16:
- {
- for (int rows = 0; rows < height; rows++) {
- if ((FreeImage_GetRedMask(dib) == FI16_565_RED_MASK) && (FreeImage_GetGreenMask(dib) == FI16_565_GREEN_MASK) && (FreeImage_GetBlueMask(dib) == FI16_565_BLUE_MASK)) {
- FreeImage_ConvertLine16To32_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
- } else {
- // includes case where all the masks are 0
- FreeImage_ConvertLine16To32_555(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
- }
- }
- return new_dib;
- }
- case 24:
- {
- for (int rows = 0; rows < height; rows++) {
- FreeImage_ConvertLine24To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
- }
- return new_dib;
- }
- }
- } else if(image_type == FIT_RGB16) {
- FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
- if(new_dib == NULL) {
- return NULL;
- }
- // copy metadata from src to dst
- FreeImage_CloneMetadata(new_dib, dib);
- const unsigned src_pitch = FreeImage_GetPitch(dib);
- const unsigned dst_pitch = FreeImage_GetPitch(new_dib);
- const BYTE *src_bits = FreeImage_GetBits(dib);
- BYTE *dst_bits = FreeImage_GetBits(new_dib);
- for (int rows = 0; rows < height; rows++) {
- const FIRGB16 *src_pixel = (FIRGB16*)src_bits;
- RGBQUAD *dst_pixel = (RGBQUAD*)dst_bits;
- for(int cols = 0; cols < width; cols++) {
- dst_pixel[cols].rgbRed = (BYTE)(src_pixel[cols].red >> 8);
- dst_pixel[cols].rgbGreen = (BYTE)(src_pixel[cols].green >> 8);
- dst_pixel[cols].rgbBlue = (BYTE)(src_pixel[cols].blue >> 8);
- dst_pixel[cols].rgbReserved = (BYTE)0xFF;
- }
- src_bits += src_pitch;
- dst_bits += dst_pitch;
- }
- return new_dib;
- } else if(image_type == FIT_RGBA16) {
- FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
- if(new_dib == NULL) {
- return NULL;
- }
- // copy metadata from src to dst
- FreeImage_CloneMetadata(new_dib, dib);
- const unsigned src_pitch = FreeImage_GetPitch(dib);
- const unsigned dst_pitch = FreeImage_GetPitch(new_dib);
- const BYTE *src_bits = FreeImage_GetBits(dib);
- BYTE *dst_bits = FreeImage_GetBits(new_dib);
- for (int rows = 0; rows < height; rows++) {
- const FIRGBA16 *src_pixel = (FIRGBA16*)src_bits;
- RGBQUAD *dst_pixel = (RGBQUAD*)dst_bits;
- for(int cols = 0; cols < width; cols++) {
- dst_pixel[cols].rgbRed = (BYTE)(src_pixel[cols].red >> 8);
- dst_pixel[cols].rgbGreen = (BYTE)(src_pixel[cols].green >> 8);
- dst_pixel[cols].rgbBlue = (BYTE)(src_pixel[cols].blue >> 8);
- dst_pixel[cols].rgbReserved = (BYTE)(src_pixel[cols].alpha >> 8);
- }
- src_bits += src_pitch;
- dst_bits += dst_pitch;
- }
- return new_dib;
- }
-
- return NULL;
- }