struct png_header
{
- int width;
- int height;
+ unsigned width;
+ unsigned height;
int bpp;
int mode;
};
else return c;
}
-static void applyfilter1(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, int width)
+static void applyfilter1(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, unsigned width)
{
int x;
unsigned char last=0;
}
-static void applyfilter2(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, int width)
+static void applyfilter2(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, unsigned width)
{
int x;
unsigned char lasta=0;
/* also performs 24 bit conversion! */
-static void applyfilter3(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, int width)
+static void applyfilter3(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, unsigned width)
{
int x;
unsigned char lastr=0;
}
}
-void png_inverse_filter_32(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, int width)
+void png_inverse_filter_32(int mode, unsigned char*src, unsigned char*old, unsigned char*dest, unsigned width)
{
int x;
unsigned char lastr=0;
}
}
-EXPORT int getPNGdimensions(const char*sname, int*destwidth, int*destheight)
+EXPORT int png_getdimensions(const char*sname, unsigned*destwidth, unsigned*destheight)
{
FILE*fi;
struct png_header header;
return 1;
}
-EXPORT int getPNG(const char*sname, int*destwidth, int*destheight, unsigned char**destdata)
+EXPORT int png_load(const char*sname, unsigned*destwidth, unsigned*destheight, unsigned char**destdata)
{
char tagid[4];
int len;
unsigned char*data;
unsigned char*imagedata;
unsigned char*zimagedata=0;
- unsigned long int imagedatalen;
unsigned long int zimagedatalen=0;
unsigned char*palette = 0;
int palettelen = 0;
return 0;
}
- imagedatalen = bypp * header.width * header.height + 65536;
+ unsigned long long imagedatalen_64 = ((unsigned long long)header.width + 1) * header.height * bypp;
+ if(imagedatalen_64 > 0xffffffff)
+ return 0;
+ unsigned long imagedatalen = (unsigned long)imagedatalen_64;
imagedata = (unsigned char*)malloc(imagedatalen);
fseek(fi,8,SEEK_SET);
return hash;
}
-static int png_get_number_of_palette_entries(COL*img, int width, int height, COL*palette, char*has_alpha)
+static int png_get_number_of_palette_entries(COL*img, unsigned width, unsigned height, COL*palette, char*has_alpha)
{
int len = width*height;
int t;
}
}
-static int png_apply_specific_filter_8(int filtermode, unsigned char*dest, unsigned char*src, int width)
+static int png_apply_specific_filter_8(int filtermode, unsigned char*dest, unsigned char*src, unsigned width)
{
int pos2 = 0;
int pos = 0;
- int srcwidth = width;
+ unsigned srcwidth = width;
int x;
if(filtermode == 0) {
for(x=0;x<width;x++) {
return filtermode;
}
-static int png_apply_specific_filter_32(int filtermode, unsigned char*dest, unsigned char*src, int width)
+static int png_apply_specific_filter_32(int filtermode, unsigned char*dest, unsigned char*src, unsigned width)
{
int pos2 = 0;
int pos = 0;
- int srcwidth = width*4;
+ unsigned srcwidth = width*4;
int x;
if(filtermode == 0) {
for(x=0;x<width;x++) {
}
}
-static int png_find_best_filter(unsigned char*src, int width, int bpp, int y)
+static int png_find_best_filter(unsigned char*src, unsigned width, int bpp, int y)
{
make_num_bits_table();
}
-static int png_apply_filter(unsigned char*dest, unsigned char*src, int width, int y, int bpp)
+static int png_apply_filter(unsigned char*dest, unsigned char*src, unsigned width, int y, int bpp)
{
int best_nr = 0;
#if 0
return best_nr;
}
-int png_apply_filter_8(unsigned char*dest, unsigned char*src, int width, int y)
+int png_apply_filter_8(unsigned char*dest, unsigned char*src, unsigned width, int y)
{
return png_apply_filter(dest, src, width, y, 8);
}
-int png_apply_filter_32(unsigned char*dest, unsigned char*src, int width, int y)
+int png_apply_filter_32(unsigned char*dest, unsigned char*src, unsigned width, int y)
{
return png_apply_filter(dest, src, width, y, 32);
}
-EXPORT void savePNG(const char*filename, unsigned char*data, int width, int height, int numcolors)
+EXPORT void png_write_palette_based(const char*filename, unsigned char*data, unsigned width, unsigned height, int numcolors)
{
FILE*fi;
int crc;
{
int x,y;
int bypp = bpp/8;
- int srcwidth = width * bypp;
- int linelen = 1 + srcwidth;
+ unsigned srcwidth = width * bypp;
+ unsigned linelen = 1 + srcwidth;
if(bypp==2)
linelen = 1 + ((srcwidth+1)&~1);
else if(bypp==3)
fclose(fi);
}
-EXPORT void writePNG(const char*filename, unsigned char*data, int width, int height)
+EXPORT void png_write(const char*filename, unsigned char*data, unsigned width, unsigned height)
{
- savePNG(filename, data, width, height, 0);
+ png_write_palette_based(filename, data, width, height, 0);
}
-EXPORT void writePalettePNG(const char*filename, unsigned char*data, int width, int height)
+EXPORT void png_write_palette_based_2(const char*filename, unsigned char*data, unsigned width, unsigned height)
{
- savePNG(filename, data, width, height, 256);
+ png_write_palette_based(filename, data, width, height, 256);
}