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https://github.com/RaySollium99/libpicofe.git
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move common files to root
This commit is contained in:
notaz
Grazvydas Ignotas
parent
f506842df2
commit
a86e9a3e58
25 changed files with 15 additions and 15 deletions
266
readpng.c
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266
readpng.c
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/*
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* (C) Gražvydas "notaz" Ignotas, 2008-2011
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*
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* This work is licensed under the terms of any of these licenses
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* (at your option):
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* - GNU GPL, version 2 or later.
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* - GNU LGPL, version 2.1 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <png.h>
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#include "readpng.h"
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#include "lprintf.h"
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int readpng(void *dest, const char *fname, readpng_what what, int req_w, int req_h)
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{
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FILE *fp;
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png_structp png_ptr = NULL;
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png_infop info_ptr = NULL;
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png_bytepp row_ptr = NULL;
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int ret = -1;
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if (dest == NULL || fname == NULL)
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{
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return -1;
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}
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fp = fopen(fname, "rb");
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if (fp == NULL)
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{
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lprintf(__FILE__ ": failed to open: %s\n", fname);
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return -1;
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}
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png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (!png_ptr)
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{
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lprintf(__FILE__ ": png_create_read_struct() failed\n");
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fclose(fp);
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return -1;
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}
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info_ptr = png_create_info_struct(png_ptr);
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if (!info_ptr)
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{
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lprintf(__FILE__ ": png_create_info_struct() failed\n");
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goto done;
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}
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// Start reading
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png_init_io(png_ptr, fp);
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png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_STRIP_ALPHA | PNG_TRANSFORM_PACKING, NULL);
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row_ptr = png_get_rows(png_ptr, info_ptr);
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if (row_ptr == NULL)
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{
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lprintf(__FILE__ ": png_get_rows() failed\n");
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goto done;
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}
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// lprintf("%s: %ix%i @ %ibpp\n", fname, (int)info_ptr->width, (int)info_ptr->height, info_ptr->pixel_depth);
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switch (what)
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{
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case READPNG_BG:
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{
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int height, width, h;
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unsigned short *dst = dest;
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if (info_ptr->pixel_depth != 24)
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{
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lprintf(__FILE__ ": bg image uses %ibpp, needed 24bpp\n", info_ptr->pixel_depth);
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break;
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}
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height = info_ptr->height;
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if (height > req_h)
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height = req_h;
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width = info_ptr->width;
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if (width > req_w)
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width = req_w;
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for (h = 0; h < height; h++)
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{
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unsigned char *src = row_ptr[h];
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int len = width;
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while (len--)
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{
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#ifdef PSP
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*dst++ = ((src[2]&0xf8)<<8) | ((src[1]&0xf8)<<3) | (src[0] >> 3); // BGR
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#else
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*dst++ = ((src[0]&0xf8)<<8) | ((src[1]&0xf8)<<3) | (src[2] >> 3); // RGB
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#endif
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src += 3;
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}
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dst += req_w - width;
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}
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break;
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}
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case READPNG_FONT:
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{
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int x, y, x1, y1;
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unsigned char *dst = dest;
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if (info_ptr->width != req_w || info_ptr->height != req_h)
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{
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lprintf(__FILE__ ": unexpected font image size %dx%d, needed %dx%d\n",
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(int)info_ptr->width, (int)info_ptr->height, req_w, req_h);
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break;
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}
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if (info_ptr->pixel_depth != 8)
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{
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lprintf(__FILE__ ": font image uses %ibpp, needed 8bpp\n", info_ptr->pixel_depth);
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break;
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}
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for (y = 0; y < 16; y++)
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{
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for (x = 0; x < 16; x++)
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{
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/* 16x16 grid of syms */
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int sym_w = req_w / 16;
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int sym_h = req_h / 16;
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for (y1 = 0; y1 < sym_h; y1++)
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{
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unsigned char *src = row_ptr[y*sym_h + y1] + x*sym_w;
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for (x1 = sym_w/2; x1 > 0; x1--, src+=2)
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*dst++ = ((src[0]^0xff) & 0xf0) | ((src[1]^0xff) >> 4);
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}
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}
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}
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break;
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}
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case READPNG_SELECTOR:
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{
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int x1, y1;
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unsigned char *dst = dest;
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if (info_ptr->width != req_w || info_ptr->height != req_h)
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{
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lprintf(__FILE__ ": unexpected selector image size %ix%i, needed %dx%d\n",
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(int)info_ptr->width, (int)info_ptr->height, req_w, req_h);
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break;
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}
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if (info_ptr->pixel_depth != 8)
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{
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lprintf(__FILE__ ": selector image uses %ibpp, needed 8bpp\n", info_ptr->pixel_depth);
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break;
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}
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for (y1 = 0; y1 < req_h; y1++)
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{
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unsigned char *src = row_ptr[y1];
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for (x1 = req_w/2; x1 > 0; x1--, src+=2)
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*dst++ = ((src[0]^0xff) & 0xf0) | ((src[1]^0xff) >> 4);
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}
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break;
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}
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case READPNG_24:
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{
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int height, width, h;
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unsigned char *dst = dest;
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if (info_ptr->pixel_depth != 24)
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{
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lprintf(__FILE__ ": image uses %ibpp, needed 24bpp\n", info_ptr->pixel_depth);
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break;
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}
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height = info_ptr->height;
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if (height > req_h)
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height = req_h;
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width = info_ptr->width;
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if (width > req_w)
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width = req_w;
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for (h = 0; h < height; h++)
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{
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int len = width;
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unsigned char *src = row_ptr[h];
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dst += (req_w - width) * 3;
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for (len = width; len > 0; len--, dst+=3, src+=3)
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dst[0] = src[2], dst[1] = src[1], dst[2] = src[0];
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}
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break;
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}
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}
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ret = 0;
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done:
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png_destroy_read_struct(&png_ptr, info_ptr ? &info_ptr : NULL, (png_infopp)NULL);
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fclose(fp);
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return ret;
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}
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int writepng(const char *fname, unsigned short *src, int w, int h)
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{
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png_structp png_ptr = NULL;
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png_infop info_ptr = NULL;
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png_bytepp row_pointers;
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int i, j, ret = -1;
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FILE *f;
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f = fopen(fname, "wb");
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if (f == NULL) {
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lprintf(__FILE__ ": failed to open \"%s\"\n", fname);
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return -1;
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}
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row_pointers = calloc(h, sizeof(row_pointers[0]));
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if (row_pointers == NULL)
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goto end1;
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for (i = 0; i < h; i++) {
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unsigned char *dst = malloc(w * 3);
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if (dst == NULL)
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goto end2;
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row_pointers[i] = dst;
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for (j = 0; j < w; j++, src++, dst += 3) {
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dst[0] = (*src & 0xf800) >> 8;
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dst[1] = (*src & 0x07e0) >> 3;
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dst[2] = (*src & 0x001f) << 3;
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}
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}
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/* initialize stuff */
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png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (png_ptr == NULL) {
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fprintf(stderr, "png_create_write_struct() failed");
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goto end2;
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}
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info_ptr = png_create_info_struct(png_ptr);
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if (info_ptr == NULL) {
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fprintf(stderr, "png_create_info_struct() failed");
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goto end3;
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}
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if (setjmp(png_jmpbuf(png_ptr)) != 0) {
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fprintf(stderr, "error in png code\n");
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goto end4;
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}
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png_init_io(png_ptr, f);
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png_set_IHDR(png_ptr, info_ptr, w, h,
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8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
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PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
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png_write_info(png_ptr, info_ptr);
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png_write_image(png_ptr, row_pointers);
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png_write_end(png_ptr, NULL);
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ret = 0;
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end4:
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// png_destroy_info_struct(png_ptr, &info_ptr); // freed below
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end3:
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png_destroy_write_struct(&png_ptr, &info_ptr);
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end2:
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for (i = 0; i < h; i++)
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free(row_pointers[i]);
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free(row_pointers);
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end1:
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fclose(f);
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return ret;
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}
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