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/*
* libtcod 1.6.3
* Copyright (c) 2008,2009,2010,2012,2013,2016,2017 Jice & Mingos & rmtew
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * The name of Jice or Mingos may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JICE, MINGOS AND RMTEW ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL JICE, MINGOS OR RMTEW BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef TCOD_SDL2
#include <sys.h>
#if !defined (__HAIKU__) && !defined (__ANDROID__)
#include <stdlib.h>
#include <stdio.h>
#endif
#include <SDL.h>
#include "png/lodepng.h"
#include <libtcod_int.h>
bool TCOD_sys_check_png(const char *filename) {
static uint8_t magic_number[]={137, 80, 78, 71, 13, 10, 26, 10};
return TCOD_sys_check_magic_number(filename,sizeof(magic_number),magic_number);
}
SDL_Surface *TCOD_sys_read_png(const char *filename) {
unsigned error;
unsigned char* image;
unsigned width, height, y, bpp;
unsigned char* png;
size_t pngsize;
LodePNGState state;
SDL_Surface *bitmap;
unsigned char *source;
unsigned int rowsize;
lodepng_state_init(&state);
/*optionally customize the state*/
if (!TCOD_sys_read_file(filename,&png,&pngsize)) return NULL;
lodepng_inspect(&width,&height,&state, png, pngsize);
bpp=lodepng_get_bpp(&state.info_png.color);
if ( bpp == 24 ) {
/* don't convert to 32 bits because libtcod's 24bits renderer is faster */
state.info_raw.colortype=LCT_RGB;
} else if ( bpp != 24 && bpp != 32 ) {
/* paletted png. convert to 24 bits */
state.info_raw.colortype=LCT_RGB;
state.info_raw.bitdepth=8;
bpp=24;
}
error = lodepng_decode(&image, &width, &height, &state, png, pngsize);
free(png);
if(error) {
printf("error %u: %s\n", error, lodepng_error_text(error));
lodepng_state_cleanup(&state);
return NULL;
}
/* create the SDL surface */
bitmap=TCOD_sys_get_surface(width,height,bpp==32);
source=image;
rowsize=width*bpp/8;
for (y=0; y< height; y++ ) {
uint8_t*row_pointer=(uint8_t*)(bitmap->pixels) + y * bitmap->pitch;
memcpy(row_pointer,source,rowsize);
source+=rowsize;
}
lodepng_state_cleanup(&state);
free(image);
return bitmap;
}
void TCOD_sys_write_png(const SDL_Surface *surf, const char *filename) {
unsigned char *image, *dest=(unsigned char *)malloc(surf->h*surf->w*3*sizeof(char));
int x,y;
unsigned char *buf;
size_t size;
int error;
/* SDL uses 32bits format without alpha layer for screen. convert it to 24 bits */
image=dest;
for (y=0; y< surf->h; y++ ) {
for (x=0; x < surf->w; x++ ) {
uint8_t*pixel=(uint8_t*)(surf->pixels) + y * surf->pitch + x * surf->format->BytesPerPixel;
*dest++=*((pixel)+surf->format->Rshift/8);
*dest++=*((pixel)+surf->format->Gshift/8);
*dest++=*((pixel)+surf->format->Bshift/8);
}
}
error=lodepng_encode_memory(&buf,&size,image,surf->w,surf->h,LCT_RGB,8);
free(image);
if ( ! error ) {
TCOD_sys_write_file(filename,buf,(uint32_t)size);
free(buf);
} else {
printf("error %u: %s\n", error, lodepng_error_text(error));
}
}
#endif /* TCOD_SDL2 */