+/*
+ * (C) GraÅžvydas "notaz" Ignotas, 2008-2010
+ *
+ * This work is licensed under the terms of any of these licenses
+ * (at your option):
+ * - GNU GPL, version 2 or later.
+ * - GNU LGPL, version 2.1 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
#include <stdio.h>
#include <string.h>
#include <png.h>
#include "readpng.h"
#include "lprintf.h"
-#ifdef PSP
-#define BG_WIDTH 480
-#define BG_HEIGHT 272
-#else
-#define BG_WIDTH 320
-#define BG_HEIGHT 240
-#endif
-
-void readpng(void *dest, const char *fname, readpng_what what)
+int readpng(void *dest, const char *fname, readpng_what what, int req_w, int req_h)
{
FILE *fp;
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
png_bytepp row_ptr = NULL;
+ int ret = -1;
if (dest == NULL || fname == NULL)
{
- return;
+ return -1;
}
fp = fopen(fname, "rb");
if (fp == NULL)
{
lprintf(__FILE__ ": failed to open: %s\n", fname);
- return;
+ return -1;
}
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
{
lprintf(__FILE__ ": png_create_read_struct() failed\n");
fclose(fp);
- return;
+ return -1;
}
info_ptr = png_create_info_struct(png_ptr);
break;
}
height = info_ptr->height;
- if (height > BG_HEIGHT) height = BG_HEIGHT;
+ if (height > req_h)
+ height = req_h;
width = info_ptr->width;
- if (width > BG_WIDTH) width = BG_WIDTH;
+ if (width > req_w)
+ width = req_w;
for (h = 0; h < height; h++)
{
int len = width;
while (len--)
{
- *dst++ = ((src[0]&0xf8)<<8) | ((src[1]&0xf8)<<3) | (src[2] >> 3);
+#ifdef PSP
+ *dst++ = ((src[2]&0xf8)<<8) | ((src[1]&0xf8)<<3) | (src[0] >> 3); // BGR
+#else
+ *dst++ = ((src[0]&0xf8)<<8) | ((src[1]&0xf8)<<3) | (src[2] >> 3); // RGB
+#endif
src += 3;
}
- dst += BG_WIDTH - width;
+ dst += req_w - width;
}
break;
}
{
int x, y, x1, y1;
unsigned char *dst = dest;
- if (info_ptr->width != 128 || info_ptr->height != 160)
+ if (info_ptr->width != req_w || info_ptr->height != req_h)
{
- lprintf(__FILE__ ": unexpected font image size %ix%i, needed 128x160\n",
- (int)info_ptr->width, (int)info_ptr->height);
+ lprintf(__FILE__ ": unexpected font image size %dx%d, needed %dx%d\n",
+ (int)info_ptr->width, (int)info_ptr->height, req_w, req_h);
break;
}
if (info_ptr->pixel_depth != 8)
{
for (x = 0; x < 16; x++)
{
- for (y1 = 0; y1 < 10; y1++)
+ /* 16x16 grid of syms */
+ int sym_w = req_w / 16;
+ int sym_h = req_h / 16;
+ for (y1 = 0; y1 < sym_h; y1++)
{
- unsigned char *src = row_ptr[y*10 + y1] + x*8;
- for (x1 = 8/2; x1 > 0; x1--, src+=2)
+ unsigned char *src = row_ptr[y*sym_h + y1] + x*sym_w;
+ for (x1 = sym_w/2; x1 > 0; x1--, src+=2)
*dst++ = ((src[0]^0xff) & 0xf0) | ((src[1]^0xff) >> 4);
}
}
{
int x1, y1;
unsigned char *dst = dest;
- if (info_ptr->width != 8 || info_ptr->height != 10)
+ if (info_ptr->width != req_w || info_ptr->height != req_h)
{
- lprintf(__FILE__ ": unexpected selector image size %ix%i, needed 8x10\n",
- (int)info_ptr->width, (int)info_ptr->height);
+ lprintf(__FILE__ ": unexpected selector image size %ix%i, needed %dx%d\n",
+ (int)info_ptr->width, (int)info_ptr->height, req_w, req_h);
break;
}
if (info_ptr->pixel_depth != 8)
lprintf(__FILE__ ": selector image uses %ibpp, needed 8bpp\n", info_ptr->pixel_depth);
break;
}
- for (y1 = 0; y1 < 10; y1++)
+ for (y1 = 0; y1 < req_h; y1++)
{
unsigned char *src = row_ptr[y1];
- for (x1 = 8/2; x1 > 0; x1--, src+=2)
+ for (x1 = req_w/2; x1 > 0; x1--, src+=2)
*dst++ = ((src[0]^0xff) & 0xf0) | ((src[1]^0xff) >> 4);
}
break;
}
+
+ case READPNG_24:
+ {
+ int height, width, h;
+ unsigned char *dst = dest;
+ if (info_ptr->pixel_depth != 24)
+ {
+ lprintf(__FILE__ ": image uses %ibpp, needed 24bpp\n", info_ptr->pixel_depth);
+ break;
+ }
+ height = info_ptr->height;
+ if (height > req_h)
+ height = req_h;
+ width = info_ptr->width;
+ if (width > req_w)
+ width = req_w;
+
+ for (h = 0; h < height; h++)
+ {
+ int len = width;
+ unsigned char *src = row_ptr[h];
+ dst += (req_w - width) * 3;
+ for (len = width; len > 0; len--, dst+=3, src+=3)
+ dst[0] = src[2], dst[1] = src[1], dst[2] = src[0];
+ }
+ break;
+ }
}
+ ret = 0;
done:
png_destroy_read_struct(&png_ptr, info_ptr ? &info_ptr : NULL, (png_infopp)NULL);
fclose(fp);
+ return ret;
}