diff options
Diffstat (limited to 'smelt/sdl/CxImage/ximapng.cpp')
| -rw-r--r-- | smelt/sdl/CxImage/ximapng.cpp | 644 |
1 files changed, 0 insertions, 644 deletions
diff --git a/smelt/sdl/CxImage/ximapng.cpp b/smelt/sdl/CxImage/ximapng.cpp deleted file mode 100644 index db2f636..0000000 --- a/smelt/sdl/CxImage/ximapng.cpp +++ /dev/null @@ -1,644 +0,0 @@ -/*
- * File: ximapng.cpp
- * Purpose: Platform Independent PNG Image Class Loader and Writer
- * 07/Aug/2001 Davide Pizzolato - www.xdp.it
- * CxImage version 7.0.0 31/Dec/2010
- */
-
-#include "ximapng.h"
-
-#if CXIMAGE_SUPPORT_PNG
-
-#include "ximaiter.h"
-
-////////////////////////////////////////////////////////////////////////////////
-void CxImagePNG::ima_png_error(png_struct *png_ptr, char *message)
-{
- strcpy(info.szLastError,message);
-#if PNG_LIBPNG_VER > 10399
- longjmp(png_jmpbuf(png_ptr), 1);
-#else
- longjmp(png_ptr->jmpbuf, 1);
-#endif
-}
-////////////////////////////////////////////////////////////////////////////////
-#if CXIMAGE_SUPPORT_DECODE
-////////////////////////////////////////////////////////////////////////////////
-void CxImagePNG::expand2to4bpp(uint8_t* prow)
-{
- uint8_t *psrc,*pdst;
- uint8_t pos,idx;
- for(int32_t x=head.biWidth-1;x>=0;x--){
- psrc = prow + ((2*x)>>3);
- pdst = prow + ((4*x)>>3);
- pos = (uint8_t)(2*(3-x%4));
- idx = (uint8_t)((*psrc & (0x03<<pos))>>pos);
- pos = (uint8_t)(4*(1-x%2));
- *pdst &= ~(0x0F<<pos);
- *pdst |= (idx & 0x0F)<<pos;
- }
-}
-////////////////////////////////////////////////////////////////////////////////
-bool CxImagePNG::Decode(CxFile *hFile)
-{
- png_struct *png_ptr;
- png_info *info_ptr;
- uint8_t *row_pointers=NULL;
- CImageIterator iter(this);
-
- cx_try
- {
- /* Create and initialize the png_struct with the desired error handler
- * functions. If you want to use the default stderr and longjump method,
- * you can supply NULL for the last three parameters. We also supply the
- * the compiler header file version, so that we know if the application
- * was compiled with a compatible version of the library. REQUIRED */
- png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,(void *)NULL,NULL,NULL);
- if (png_ptr == NULL) cx_throw("Failed to create PNG structure");
-
- /* Allocate/initialize the memory for image information. REQUIRED. */
- info_ptr = png_create_info_struct(png_ptr);
- if (info_ptr == NULL) {
- png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
- cx_throw("Failed to initialize PNG info structure");
- }
-
- /* Set error handling if you are using the setjmp/longjmp method (this is
- * the normal method of doing things with libpng). REQUIRED unless you
- * set up your own error handlers in the png_create_read_struct() earlier. */
-#if PNG_LIBPNG_VER > 10399
- if (setjmp(png_jmpbuf(png_ptr))) {
-#else
- if (setjmp(png_ptr->jmpbuf)) {
-#endif
- /* Free all of the memory associated with the png_ptr and info_ptr */
- delete [] row_pointers;
- png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
- cx_throw("");
- }
-
- // use custom I/O functions
- png_set_read_fn(png_ptr, hFile, /*(png_rw_ptr)*/user_read_data);
- png_set_error_fn(png_ptr,info.szLastError,/*(png_error_ptr)*/user_error_fn,NULL);
-
- /* read the file information */
- png_read_info(png_ptr, info_ptr);
-
- png_uint_32 _width,_height;
- int _bit_depth,_color_type,_interlace_type,_compression_type,_filter_type;
-#if PNG_LIBPNG_VER > 10399
- png_get_IHDR(png_ptr,info_ptr,&_width,&_height,&_bit_depth,&_color_type,
- &_interlace_type,&_compression_type,&_filter_type);
-#else
- _width=info_ptr->width;
- _height=info_ptr->height;
- _bit_depth=info_ptr->bit_depth;
- _color_type=info_ptr->color_type;
- _interlace_type=info_ptr->interlace_type;
- //_compression_type=info_ptr->compression_type;
- //_filter_type=info_ptr->filter_type;
-#endif
-
- if (info.nEscape == -1){
- head.biWidth = _width;
- head.biHeight= _height;
- info.dwType = CXIMAGE_FORMAT_PNG;
-#if PNG_LIBPNG_VER > 10399
- longjmp(png_jmpbuf(png_ptr), 1);
-#else
- longjmp(png_ptr->jmpbuf, 1);
-#endif
- }
-
- /* calculate new number of channels */
- int32_t channels=0;
- switch(_color_type){
- case PNG_COLOR_TYPE_GRAY:
- case PNG_COLOR_TYPE_PALETTE:
- channels = 1;
- break;
- case PNG_COLOR_TYPE_GRAY_ALPHA:
- channels = 2;
- break;
- case PNG_COLOR_TYPE_RGB:
- channels = 3;
- break;
- case PNG_COLOR_TYPE_RGB_ALPHA:
- channels = 4;
- break;
- default:
- strcpy(info.szLastError,"unknown PNG color type");
-#if PNG_LIBPNG_VER > 10399
- longjmp(png_jmpbuf(png_ptr), 1);
-#else
- longjmp(png_ptr->jmpbuf, 1);
-#endif
- }
-
- //find the right pixel depth used for cximage
-#if PNG_LIBPNG_VER > 10399
- int pixel_depth = _bit_depth * png_get_channels(png_ptr,info_ptr);
-#else
- int pixel_depth = info_ptr->pixel_depth;
-#endif
- if (channels == 1 && pixel_depth>8) pixel_depth=8;
- if (channels == 2) pixel_depth=8;
- if (channels >= 3) pixel_depth=24;
-
- if (!Create(_width, _height, pixel_depth, CXIMAGE_FORMAT_PNG)){
-#if PNG_LIBPNG_VER > 10399
- longjmp(png_jmpbuf(png_ptr), 1);
-#else
- longjmp(png_ptr->jmpbuf, 1);
-#endif
- }
-
- /* get metrics */
- png_uint_32 _x_pixels_per_unit,_y_pixels_per_unit;
- int _phys_unit_type;
-#if PNG_LIBPNG_VER > 10399
- png_get_pHYs(png_ptr,info_ptr,&_x_pixels_per_unit,&_y_pixels_per_unit,&_phys_unit_type);
-#else
- _x_pixels_per_unit=info_ptr->x_pixels_per_unit;
- _y_pixels_per_unit=info_ptr->y_pixels_per_unit;
- _phys_unit_type=info_ptr->phys_unit_type;
-#endif
- switch (_phys_unit_type)
- {
- case PNG_RESOLUTION_UNKNOWN:
- SetXDPI(_x_pixels_per_unit);
- SetYDPI(_y_pixels_per_unit);
- break;
- case PNG_RESOLUTION_METER:
- SetXDPI((long)floor(_x_pixels_per_unit * 254.0 / 10000.0 + 0.5));
- SetYDPI((long)floor(_y_pixels_per_unit * 254.0 / 10000.0 + 0.5));
- break;
- }
-
- int _num_palette;
- png_colorp _palette;
-#if PNG_LIBPNG_VER > 10399
- png_get_PLTE(png_ptr,info_ptr,&_palette,&_num_palette);
-#else
- _num_palette=info_ptr->num_palette;
- _palette=info_ptr->palette;
-#endif
- if (_num_palette>0){
- SetPalette((rgb_color*)_palette,_num_palette);
- SetClrImportant(_num_palette);
- } else if (_bit_depth ==2) { //<DP> needed for 2 bpp grayscale PNGs
- SetPaletteColor(0,0,0,0);
- SetPaletteColor(1,85,85,85);
- SetPaletteColor(2,170,170,170);
- SetPaletteColor(3,255,255,255);
- } else SetGrayPalette(); //<DP> needed for grayscale PNGs
-
- int nshift = max(0,(_bit_depth>>3)-1)<<3;
-
- png_bytep _trans_alpha;
- int _num_trans;
- png_color_16p _trans_color;
-#if PNG_LIBPNG_VER > 10399
- png_get_tRNS(png_ptr,info_ptr,&_trans_alpha,&_num_trans,&_trans_color);
-#else
- _num_trans=info_ptr->num_trans;
-#endif
- if (_num_trans!=0){ //palette transparency
- if (_num_trans==1){
- if (_color_type == PNG_COLOR_TYPE_PALETTE){
- info.nBkgndIndex = _trans_color->index;
- } else{
- info.nBkgndIndex = _trans_color->gray>>nshift;
- }
- }
- if (_num_trans>1){
- RGBQUAD* pal=GetPalette();
- if (pal){
- uint32_t ip;
- if(_trans_alpha != 0) {
- for (ip=0;ip<min(head.biClrUsed,(unsigned long)_num_trans);ip++)
- pal[ip].rgbReserved=_trans_alpha[ip];
- }
- for (ip=_num_trans;ip<head.biClrUsed;ip++){
- pal[ip].rgbReserved=255;
- }
- info.bAlphaPaletteEnabled=true;
- }
- }
- }
-
- if (channels == 3){ //check RGB binary transparency
- /* seems unnecessary to call again, but the conditional must be important so... */
- if (png_get_tRNS(png_ptr,info_ptr,&_trans_alpha,&_num_trans,&_trans_color)){
- info.nBkgndColor.rgbRed = (uint8_t)(_trans_color->red>>nshift);
- info.nBkgndColor.rgbGreen = (uint8_t)(_trans_color->green>>nshift);
- info.nBkgndColor.rgbBlue = (uint8_t)(_trans_color->blue>>nshift);
- info.nBkgndColor.rgbReserved = 0;
- info.nBkgndIndex = 0;
- }
- }
-
- int32_t alpha_present = (channels - 1) % 2;
- if (alpha_present){
-#if CXIMAGE_SUPPORT_ALPHA // <vho>
- AlphaCreate();
-#else
- png_set_strip_alpha(png_ptr);
-#endif //CXIMAGE_SUPPORT_ALPHA
- }
-
- // <vho> - flip the RGB pixels to BGR (or RGBA to BGRA)
- if (_color_type & PNG_COLOR_MASK_COLOR){
- png_set_bgr(png_ptr);
- }
-
- // <vho> - handle cancel
- if (info.nEscape)
-#if PNG_LIBPNG_VER > 10399
- longjmp(png_jmpbuf(png_ptr), 1);
-#else
- longjmp(png_ptr->jmpbuf, 1);
-#endif
-
- // row_bytes is the width x number of channels x (bit-depth / 8)
-#if PNG_LIBPNG_VER > 10399
- row_pointers = new uint8_t[png_get_rowbytes(png_ptr,info_ptr) + 8];
-#else
- row_pointers = new uint8_t[info_ptr->rowbytes + 8];
-#endif
-
-
- // turn on interlace handling
- int32_t number_passes = png_set_interlace_handling(png_ptr);
-
- if (number_passes>1){
- SetCodecOption( (ENCODE_INTERLACE) | GetCodecOption(CXIMAGE_FORMAT_PNG));
- } else {
- SetCodecOption(~(ENCODE_INTERLACE) & GetCodecOption(CXIMAGE_FORMAT_PNG));
- }
-
- int chan_offset = _bit_depth >> 3;
-#if PNG_LIBPNG_VER > 10399
- int pixel_offset = (_bit_depth * png_get_channels(png_ptr,info_ptr)) >> 3;
-#else
- int pixel_offset = info_ptr->pixel_depth >> 3;
-#endif
-
- for (int32_t pass=0; pass < number_passes; pass++) {
- iter.Upset();
- int32_t y=0;
- do {
-
- // <vho> - handle cancel
- if (info.nEscape)
-#if PNG_LIBPNG_VER > 10399
- longjmp(png_jmpbuf(png_ptr), 1);
-#else
- longjmp(png_ptr->jmpbuf, 1);
-#endif
-
-#if CXIMAGE_SUPPORT_ALPHA // <vho>
- if (AlphaIsValid()) {
-
- //compute the correct position of the line
- int32_t ax,ay;
- ay = head.biHeight-1-y;
- uint8_t* prow= iter.GetRow(ay);
-
- //recover data from previous scan
- if (_interlace_type && pass>0 && pass!=7){
- for(ax=0;ax<head.biWidth;ax++){
- int32_t px = ax * pixel_offset;
- if (channels == 2){
- row_pointers[px] = prow[ax];
- row_pointers[px+chan_offset]=AlphaGet(ax,ay);
- } else {
- int32_t qx = ax * 3;
- row_pointers[px] =prow[qx];
- row_pointers[px+chan_offset] =prow[qx+1];
- row_pointers[px+chan_offset*2]=prow[qx+2];
- row_pointers[px+chan_offset*3]=AlphaGet(ax,ay);
- }
- }
- }
-
- //read next row
- png_read_row(png_ptr, row_pointers, NULL);
-
- //RGBA -> RGB + A
- for(ax=0;ax<head.biWidth;ax++){
- int32_t px = ax * pixel_offset;
- if (channels == 2){
- prow[ax] = row_pointers[px];
- AlphaSet(ax,ay,row_pointers[px+chan_offset]);
- } else {
- int32_t qx = ax * 3;
- prow[qx] =row_pointers[px];
- prow[qx+1]=row_pointers[px+chan_offset];
- prow[qx+2]=row_pointers[px+chan_offset*2];
- AlphaSet(ax,ay,row_pointers[px+chan_offset*3]);
- }
- }
- } else
-#endif // CXIMAGE_SUPPORT_ALPHA // vho
- {
- //recover data from previous scan
- if (_interlace_type && pass>0){
-#if PNG_LIBPNG_VER > 10399
- iter.GetRow(row_pointers, png_get_rowbytes(png_ptr,info_ptr));
-#else
- iter.GetRow(row_pointers, info_ptr->rowbytes);
-#endif
- //re-expand buffer for images with bit depth > 8
- if (_bit_depth > 8){
- for(int32_t ax=(head.biWidth*channels-1);ax>=0;ax--)
- row_pointers[ax*chan_offset] = row_pointers[ax];
- }
- }
-
- //read next row
- png_read_row(png_ptr, row_pointers, NULL);
-
- //shrink 16 bit depth images down to 8 bits
- if (_bit_depth > 8){
- for(int32_t ax=0;ax<(head.biWidth*channels);ax++)
- row_pointers[ax] = row_pointers[ax*chan_offset];
- }
-
- //copy the pixels
-#if PNG_LIBPNG_VER > 10399
- iter.SetRow(row_pointers, png_get_rowbytes(png_ptr,info_ptr));
-#else
- iter.SetRow(row_pointers, info_ptr->rowbytes);
-#endif
- //<DP> expand 2 bpp images only in the last pass
- if (_bit_depth==2 && pass==(number_passes-1))
- expand2to4bpp(iter.GetRow());
-
- //go on
- iter.PrevRow();
- }
-
- y++;
- } while(y<head.biHeight);
- }
-
- delete [] row_pointers;
- row_pointers = NULL;
-
- /* read the rest of the file, getting any additional chunks in info_ptr - REQUIRED */
- png_read_end(png_ptr, info_ptr);
-
- /* clean up after the read, and free any memory allocated - REQUIRED */
- png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
-
- } cx_catch {
- if (strcmp(message,"")) strncpy(info.szLastError,message,255);
- if (info.nEscape == -1 && info.dwType == CXIMAGE_FORMAT_PNG) return true;
- return false;
- }
- /* that's it */
- return true;
-}
-////////////////////////////////////////////////////////////////////////////////
-#endif //CXIMAGE_SUPPORT_DECODE
-////////////////////////////////////////////////////////////////////////////////
-#if CXIMAGE_SUPPORT_ENCODE
-////////////////////////////////////////////////////////////////////////////////
-bool CxImagePNG::Encode(CxFile *hFile)
-{
- if (EncodeSafeCheck(hFile)) return false;
-
- CImageIterator iter(this);
- uint8_t trans[256]; //for transparency (don't move)
- png_struct *png_ptr;
- png_info *info_ptr;
-
- cx_try
- {
- /* Create and initialize the png_struct with the desired error handler
- * functions. If you want to use the default stderr and longjump method,
- * you can supply NULL for the last three parameters. We also check that
- * the library version is compatible with the one used at compile time,
- * in case we are using dynamically linked libraries. REQUIRED.
- */
- png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,(void *)NULL,NULL,NULL);
- if (png_ptr == NULL) cx_throw("Failed to create PNG structure");
-
- /* Allocate/initialize the image information data. REQUIRED */
- info_ptr = png_create_info_struct(png_ptr);
- if (info_ptr == NULL){
- png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
- cx_throw("Failed to initialize PNG info structure");
- }
-
- /* Set error handling. REQUIRED if you aren't supplying your own
- * error hadnling functions in the png_create_write_struct() call.
- */
- if (setjmp(png_ptr->jmpbuf)){
- /* If we get here, we had a problem reading the file */
- if (info_ptr->palette) free(info_ptr->palette);
- png_destroy_write_struct(&png_ptr, (png_infopp)&info_ptr);
- cx_throw("Error saving PNG file");
- }
-
- /* set up the output control */
- //png_init_io(png_ptr, hFile);
-
- // use custom I/O functions
- png_set_write_fn(png_ptr,hFile,/*(png_rw_ptr)*/user_write_data,/*(png_flush_ptr)*/user_flush_data);
-
- /* set the file information here */
- info_ptr->width = GetWidth();
- info_ptr->height = GetHeight();
- info_ptr->pixel_depth = (uint8_t)GetBpp();
- info_ptr->channels = (GetBpp()>8) ? (uint8_t)3: (uint8_t)1;
- info_ptr->bit_depth = (uint8_t)(GetBpp()/info_ptr->channels);
- info_ptr->compression_type = info_ptr->filter_type = 0;
- info_ptr->valid = 0;
-
- // set interlace type
- DWORD codec_opt = GetCodecOption(CXIMAGE_FORMAT_PNG);
- if (codec_opt & CxImagePNG::ENCODE_INTERLACE)
- info_ptr->interlace_type = PNG_INTERLACE_ADAM7;
- else
- info_ptr->interlace_type = PNG_INTERLACE_NONE;
-
- /* set compression level */
- int32_t compress_level;
- switch (codec_opt & CxImagePNG::ENCODE_COMPRESSION_MASK)
- {
- case ENCODE_NO_COMPRESSION:
- compress_level = Z_NO_COMPRESSION;
- break;
- case ENCODE_BEST_SPEED:
- compress_level = Z_BEST_SPEED;
- break;
- case ENCODE_BEST_COMPRESSION:
- compress_level = Z_BEST_COMPRESSION;
- break;
- default:
- compress_level = Z_DEFAULT_COMPRESSION;
- break;
- }
- png_set_compression_level(png_ptr, compress_level);
-
- bool bGrayScale = IsGrayScale();
-
- if (GetNumColors()){
- if (bGrayScale){
- info_ptr->color_type = PNG_COLOR_TYPE_GRAY;
- } else {
- info_ptr->color_type = PNG_COLOR_TYPE_PALETTE;
- }
- } else {
- info_ptr->color_type = PNG_COLOR_TYPE_RGB;
- }
-#if CXIMAGE_SUPPORT_ALPHA
- if (AlphaIsValid()){
- info_ptr->color_type |= PNG_COLOR_MASK_ALPHA;
- info_ptr->channels++;
- info_ptr->bit_depth = 8;
- info_ptr->pixel_depth += 8;
- }
-#endif
-
- /* set background */
- png_color_16 image_background={ 0, 255, 255, 255, 0 };
- RGBQUAD tc = GetTransColor();
- if (info.nBkgndIndex>=0) {
- image_background.blue = tc.rgbBlue;
- image_background.green = tc.rgbGreen;
- image_background.red = tc.rgbRed;
- }
- png_set_bKGD(png_ptr, info_ptr, &image_background);
-
- /* set metrics */
- png_set_pHYs(png_ptr, info_ptr, head.biXPelsPerMeter, head.biYPelsPerMeter, PNG_RESOLUTION_METER);
-
- png_set_IHDR(png_ptr, info_ptr, info_ptr->width, info_ptr->height, info_ptr->bit_depth,
- info_ptr->color_type, info_ptr->interlace_type,
- PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
-
- //<DP> simple transparency
- if (info.nBkgndIndex >= 0){
- info_ptr->num_trans = 1;
- info_ptr->valid |= PNG_INFO_tRNS;
- info_ptr->trans_alpha = trans;
- info_ptr->trans_color.index = (uint8_t)info.nBkgndIndex;
- info_ptr->trans_color.red = tc.rgbRed;
- info_ptr->trans_color.green = tc.rgbGreen;
- info_ptr->trans_color.blue = tc.rgbBlue;
- info_ptr->trans_color.gray = info_ptr->trans_color.index;
-
- // the transparency indexes start from 0 for non grayscale palette
- if (!bGrayScale && head.biClrUsed && info.nBkgndIndex)
- SwapIndex(0,(uint8_t)info.nBkgndIndex);
- }
-
- /* set the palette if there is one */
- if (GetPalette()){
- if (!bGrayScale){
- info_ptr->valid |= PNG_INFO_PLTE;
- }
-
- int32_t nc = GetClrImportant();
- if (nc==0) nc = GetNumColors();
-
- if (info.bAlphaPaletteEnabled){
- for(uint16_t ip=0; ip<nc;ip++)
- trans[ip]=GetPaletteColor((uint8_t)ip).rgbReserved;
- info_ptr->num_trans = (uint16_t)nc;
- info_ptr->valid |= PNG_INFO_tRNS;
- info_ptr->trans_alpha = trans;
- }
-
- // copy the palette colors
- info_ptr->palette = new png_color[nc];
- info_ptr->num_palette = (png_uint_16) nc;
- for (int32_t i=0; i<nc; i++)
- GetPaletteColor(i, &info_ptr->palette[i].red, &info_ptr->palette[i].green, &info_ptr->palette[i].blue);
- }
-
-#if CXIMAGE_SUPPORT_ALPHA // <vho>
- //Merge the transparent color with the alpha channel
- if (AlphaIsValid() && head.biBitCount==24 && info.nBkgndIndex>=0){
- for(int32_t y=0; y < head.biHeight; y++){
- for(int32_t x=0; x < head.biWidth ; x++){
- RGBQUAD c=GetPixelColor(x,y,false);
- if (*(int32_t*)&c==*(int32_t*)&tc)
- AlphaSet(x,y,0);
- } } }
-#endif // CXIMAGE_SUPPORT_ALPHA // <vho>
-
- int32_t row_size = max(info.dwEffWidth, info_ptr->width*info_ptr->channels*(info_ptr->bit_depth/8));
- info_ptr->rowbytes = row_size;
- uint8_t *row_pointers = new uint8_t[row_size];
-
- /* write the file information */
- png_write_info(png_ptr, info_ptr);
-
- //interlace handling
- int32_t num_pass = png_set_interlace_handling(png_ptr);
- for (int32_t pass = 0; pass < num_pass; pass++){
- //write image
- iter.Upset();
- int32_t ay=head.biHeight-1;
- RGBQUAD c;
- do {
-#if CXIMAGE_SUPPORT_ALPHA // <vho>
- if (AlphaIsValid()){
- for (int32_t ax=head.biWidth-1; ax>=0;ax--){
- c = BlindGetPixelColor(ax,ay);
- int32_t px = ax * info_ptr->channels;
- if (!bGrayScale){
- row_pointers[px++]=c.rgbRed;
- row_pointers[px++]=c.rgbGreen;
- }
- row_pointers[px++]=c.rgbBlue;
- row_pointers[px] = AlphaGet(ax,ay);
- }
- png_write_row(png_ptr, row_pointers);
- ay--;
- }
- else
-#endif //CXIMAGE_SUPPORT_ALPHA // <vho>
- {
- iter.GetRow(row_pointers, row_size);
- if (info_ptr->color_type == PNG_COLOR_TYPE_RGB) //HACK BY OP
- RGBtoBGR(row_pointers, row_size);
- png_write_row(png_ptr, row_pointers);
- }
- } while(iter.PrevRow());
- }
-
- delete [] row_pointers;
- row_pointers = NULL;
-
- //if necessary, restore the original palette
- if (!bGrayScale && head.biClrUsed && info.nBkgndIndex>0)
- SwapIndex((uint8_t)info.nBkgndIndex,0);
-
- /* It is REQUIRED to call this to finish writing the rest of the file */
- png_write_end(png_ptr, info_ptr);
-
- /* if you malloced the palette, free it here */
- if (info_ptr->palette){
- delete [] (info_ptr->palette);
- info_ptr->palette = NULL;
- }
-
- /* clean up after the write, and free any memory allocated */
- png_destroy_write_struct(&png_ptr, (png_infopp)&info_ptr);
-
- } cx_catch {
- if (strcmp(message,"")) strncpy(info.szLastError,message,255);
- return FALSE;
- }
- /* that's it */
- return TRUE;
-}
-////////////////////////////////////////////////////////////////////////////////
-#endif // CXIMAGE_SUPPORT_ENCODE
-////////////////////////////////////////////////////////////////////////////////
-#endif // CXIMAGE_SUPPORT_PNG
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