/* * pixmap.cc: 2D image class * * This file is part of Pyrit Ray Tracer. * * Copyright 2008 Radek Brich * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */#include <stdio.h>#ifdef HAVE_PNG# include <png.h>#endif#include "pixmap.h"unsigned char *Pixmap::getCharData() const{ unsigned char *cdata = new unsigned char[w*h*3]; Float *fd = fdata;#ifdef NO_SSE for (unsigned char *cd = cdata; cd != cdata + w*h*3; cd++, fd++) if (*fd > 1.0) *cd = 255; else *cd = (unsigned char)(*fd * 255.0);#else __m128 cmax = _mm_set_ps1(255.0); __m64 m; for (unsigned char *cd = cdata; cd < cdata + w*h*3; cd += 4, fd += 4) { m = _mm_cvtps_pi8(_mm_mul_ps(cmax, _mm_min_ps(mOne, _mm_set_ps(fd[3],fd[2],fd[1],fd[0])))); memcpy(cd, &m, 4); }#endif return cdata;}int Pixmap::writePNG(const char *fname) const{#ifndef HAVE_PNG return -3;#else int y; FILE *f; png_structp png; /* PNG data */ png_infop pnginfo; /* PNG info */ unsigned char *cdata, *d; if ((f = fopen(fname, "wb")) == NULL) return -1; png = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0); if (!png) { fclose(f); return -2; } pnginfo = png_create_info_struct(png); if (!pnginfo) { fclose(f); png_destroy_write_struct(&png, 0); return -2; } if (setjmp(png_jmpbuf(png))) { fclose(f); png_destroy_info_struct(png, &pnginfo); png_destroy_write_struct(&png, &pnginfo); return -2; } /* predat knihovne PNG ukazatel na soubor */ png_init_io(png, f); /* parametry PNG */ png_set_compression_level(png, Z_BEST_COMPRESSION); png_set_IHDR(png, pnginfo, w, h, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); png_set_sRGB(png, pnginfo, PNG_sRGB_INTENT_PERCEPTUAL); png_set_sRGB_gAMA_and_cHRM(png, pnginfo, PNG_INFO_sRGB); /* zapsat hlavicku */ png_write_info(png, pnginfo); /* zapsat data */ d = cdata = getCharData(); for (y = 0; y < h; y++, d += w * 3) png_write_row(png, (png_byte *) d); /* ukoncit soubor a uvolnit pomocne struktury */ png_write_end(png, pnginfo); png_destroy_info_struct(png, &pnginfo); png_destroy_write_struct(&png, 0); fclose(f); delete[] cdata; return 0;#endif}