diff options
Diffstat (limited to 'src/pngenc.cpp')
| -rw-r--r-- | src/pngenc.cpp | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/src/pngenc.cpp b/src/pngenc.cpp deleted file mode 100644 index 6f8206e..0000000 --- a/src/pngenc.cpp +++ /dev/null @@ -1,170 +0,0 @@ -/****************************************************************************** - * - * - * - * - * Copyright (C) 1997-2008 by Dimitri van Heesch. - * - * Permission to use, copy, modify, and distribute this software and its - * documentation under the terms of the GNU General Public License is hereby - * granted. No representations are made about the suitability of this software - * for any purpose. It is provided "as is" without express or implied warranty. - * See the GNU General Public License for more details. - * - * Documents produced by Doxygen are derivative works derived from the - * input used in their production; they are not affected by this license. - * - * --------------------------------------------------------------------------- - * - * The Portable Network Graphic format is an ISO Standard. - * Most of the code below was donated by Bernhard Ristow. - */ - -#ifndef png_jmpbuf -# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) -#endif - -#define ALL_STATIC -#include <../libpng/png.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <errno.h> -#include "pngenc.h" -#include "message.h" - -#undef jmpbuf - -static void user_error_fn(png_structp, png_const_charp error_msg) -{ - err("%s\n", error_msg); -} - -static void user_warning_fn(png_structp, png_const_charp warning_msg) -{ - err("%s\n", warning_msg); -} - -PngEncoder::PngEncoder(Byte *rawBytes, Color *p, int w, int h, Byte d, int t) : - data(rawBytes), palette(p), width(w), height(h), depth(d), transIndex(t) -{ - numPixels = w*h; - dataPtr = data; -} - -PngEncoder::~PngEncoder() -{ -} - -void PngEncoder::write(const char *name) -{ - FILE * file = NULL; - unsigned char ** rows = 0; - unsigned char * cmap = 0; - short numOfColors = (1<<depth); - short bit_depth = 4; - long i = 0; - long j = 0; - png_structp png_ptr; - png_infop info_ptr; - char user_error_ptr[] = "PngEncoder"; - png_colorp png_palette; - png_byte ti[1]; - - png_ptr = png_create_write_struct - ( PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr, - user_error_fn, user_warning_fn); - if (!png_ptr) - { - err("Can not allocate writing structure!\n"); - return; - } - - info_ptr = png_create_info_struct(png_ptr); - if (!info_ptr) - { - png_destroy_write_struct(&png_ptr, (png_infopp)NULL); - err("Can not allocate writing structure!\n"); - return; - } - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_destroy_write_struct(&png_ptr, &info_ptr); - return; - } - else - { - png_palette = (png_colorp) png_malloc(png_ptr, - PNG_MAX_PALETTE_LENGTH*sizeof(png_color)); - memset(png_palette,0,PNG_MAX_PALETTE_LENGTH*sizeof(png_color)); - for (i=0; i<numOfColors; i++) - { - png_palette[i].red = palette[i].red; - png_palette[i].green = palette[i].green; - png_palette[i].blue = palette[i].blue; - } - png_set_PLTE(png_ptr, info_ptr, png_palette, numOfColors); - png_set_IHDR( png_ptr, info_ptr, width, height, bit_depth, - PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE, - PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE - ); - free(png_palette); - ti[0] = transIndex; - png_set_tRNS(png_ptr,info_ptr,ti,1,NULL); - rows = (unsigned char **) calloc(sizeof(unsigned char*),height); - rows[0] = (unsigned char *) calloc(sizeof(unsigned char),height*width); - for (i=1; i<height; i++) - { - rows[i] = rows[i-1] + width; - } - for (i=0, dataPtr=data; i<height; i++) - { - for (j=0; j<width; j++) - { - if (j%2) - { - rows[i][j/2] = ( rows[i][j/2] | *dataPtr ); - } - else - { - rows[i][j/2] = (*dataPtr) << 4; - } - dataPtr++; - } - } - png_set_rows(png_ptr,info_ptr,rows); - - file = fopen(name,"wb"); - if (file==0) - { - err("Error opening png file %s for writing: %s!\n",name,strerror(errno)); - } - else - { - png_init_io(png_ptr,file); - png_write_png(png_ptr,info_ptr,PNG_TRANSFORM_IDENTITY,NULL); - } - } - - png_destroy_write_struct(&png_ptr, &info_ptr); - - if (file) - { - fclose (file); - } - if (cmap) - { - free(cmap); - } - if (rows) - { - if (rows[0]) - { - free(rows[0]); - } - free(rows); - } - return; -} - |