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/*
This file is part of Advanced Strategic Command; http://www.asc-hq.de
Copyright (C) 1994-2003 Martin Bickel and Marc Schellenberger
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330,
Boston, MA 02111-1307 USA
*/
#ifdef NO_INTERNAL_PNG
#include <SDL_image.h>
#else
#include <png.h>
#endif
#include "surface2png.h"
#include "../util/messaginghub.h"
void writePNG( const ASCString& filename, const Surface& s )
{
writePNG( filename, s, 0,0, s.w(), s.h());
}
void writePNGtrim( const ASCString& filename, const Surface& s )
{
int x2 = 0;
int y2 = 0;
int x1 = s.w();
int y1 = s.h();
for ( int y = 0; y < s.h(); ++y )
for ( int x = 0; x < s.w(); ++x )
if ( s.GetPixelFormat().GetRGBA( s.GetPixel(x,y)).a != Surface::transparent ) {
x1 = min(x1, x);
y1 = min(y1, y);
x2 = max(x2, x);
y2 = max(y2, y);
}
writePNG( filename, s, x1,y1, x2-x1+1, y2-y1+1);
}
void writePNG( const ASCString& filename, const Surface& s, const SDLmm::SRect& rect )
{
writePNG( filename, s, rect.x, rect.y, rect.w, rect.h);
}
#ifdef NO_INTERNAL_PNG
void writePNG( const ASCString& filename, const Surface& s, int x1, int y1, int w, int h )
{
if ( s.GetPixelFormat().BytesPerPixel () != 4 ) {
errorMessage("Only 32 Bit images are supported for PNG writing");
return;
}
SDL_RWops *rw=SDL_RWFromFile( filename.c_str(),"wb");
if(rw==NULL) {
errorMessage("Could not open " + filename + " for writing");
return;
}
IMG_WritePNG_RW( rw, s.GetSurface(), x1,y1,w,h);
SDL_RWclose(rw);
}
#else
void writePNG( const ASCString& filename, const Surface& s, int x1, int y1, int w, int h )
{
if ( x1 < 0 )
x1 = 0;
if ( y1 < 0 )
y1 = 0;
if ( w >= s.w()-x1 )
w = s.w() -x1 ;
if ( h >= s.h()-y1 )
h = s.h() -y1 ;
if ( s.GetPixelFormat().BytesPerPixel() != 4 && s.GetPixelFormat().BytesPerPixel() != 1 ) {
errorMessage("Only 8 Bit and 32 Bit images are supported for PNG writing");
return;
}
FILE* fp = fopen(filename.c_str(), "wb");
if( fp == NULL)
{
errorMessage("Could not open " + filename + " for writing");
return;
}
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
png_infop info_ptr = png_create_info_struct(png_ptr);
png_init_io(png_ptr, fp);
png_color my_palette[256];
if ( s.GetPixelFormat().BytesPerPixel() == 4 ){
png_set_IHDR(png_ptr, info_ptr, w, h, 8, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
} else {
png_set_IHDR(png_ptr, info_ptr, w, h, 8, PNG_COLOR_TYPE_PALETTE, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
SDL_Palette* sdlpal = s.GetPixelFormat().palette();
if ( sdlpal->ncolors > 256 ) {
errorMessage("A palettes with more than 256 colors is not supported");
return;
}
for ( int c = 0; c < sdlpal->ncolors; ++c ) {
my_palette[c].red = sdlpal->colors[c].r;
my_palette[c].green = sdlpal->colors[c].g;
my_palette[c].blue = sdlpal->colors[c].b;
}
png_set_PLTE(png_ptr, info_ptr, my_palette, sdlpal->ncolors);
}
time_t gmt;
png_time mod_time;
time(&gmt);
png_convert_from_time_t(&mod_time, gmt);
png_set_tIME(png_ptr, info_ptr, &mod_time);
png_text text_ptr[1];
text_ptr[0].key = const_cast<char*>("Title");
text_ptr[0].text = const_cast<char*>("Advanced Strategic Command");
text_ptr[0].compression = PNG_TEXT_COMPRESSION_NONE;
png_set_text(png_ptr, info_ptr, text_ptr, 1);
Uint8* linebuf = new Uint8[w*4];
png_write_info(png_ptr, info_ptr);
int iii = 0;
char* pix = (char*)s.pixels();
for ( int y = y1; y < y1 + h; ++y ) {
Uint32* srcpix32 = (Uint32*)(pix + y * s.pitch());
srcpix32 += x1;
Uint8* srcpix8 = (Uint8*)(pix + y * s.pitch());
srcpix8 += x1;
if ( s.GetPixelFormat().BytesPerPixel() == 4) {
for ( int x = 0; x < w; ++x )
s.GetPixelFormat().GetRGBA( srcpix32[x], linebuf[x*4],linebuf[x*4+1],linebuf[x*4+2],linebuf[x*4+3] );
} else {
if ( s.GetPixelFormat().BytesPerPixel() == 1)
for ( int x = 0; x < w; ++x ) {
linebuf[x] = srcpix8[x];
if ( linebuf[x] )
++iii;
}
}
png_write_row(png_ptr, (png_bytep) linebuf);
}
delete[] linebuf;
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(fp);
}
#endif
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