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#include "tile_colour.h"
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <png.h>
tile_colour tile_colour::background(71, 108, 108, 255);
tile_colour tile_colour::transparent(0, 0, 0, 0);
tile_colour tile_colour::black(0, 0, 0, 255);
bool tile_colour::operator==(const tile_colour &rhs) const
{
return (r == rhs.r && g == rhs.g && b == rhs.b && a == rhs.a);
}
bool tile_colour::operator!=(const tile_colour &rhs) const
{
return (r != rhs.r || g != rhs.g || b != rhs.b || a != rhs.a);
}
const tile_colour &tile_colour::operator=(const tile_colour &rhs)
{
r = rhs.r;
g = rhs.g;
b = rhs.b;
a = rhs.a;
return (*this);
}
bool write_png(const char *filename, tile_colour *pixels,
unsigned int width, unsigned int height)
{
FILE *fp = fopen(filename, "wb");
if (!fp)
{
fprintf(stderr, "Error: Can't open file '%s' for write.\n", filename);
return (false);
}
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,
NULL, NULL, NULL);
if (!png_ptr)
return (false);
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
return (false);
}
png_init_io(png_ptr, fp);
int bit_depth = 8;
int colour_type = PNG_COLOR_TYPE_RGB_ALPHA;
int interlace_type = PNG_INTERLACE_NONE;
int compression_type = PNG_COMPRESSION_TYPE_DEFAULT;
int filter_method = PNG_FILTER_TYPE_DEFAULT;
png_set_IHDR(png_ptr, info_ptr, width, height,
bit_depth, colour_type, interlace_type,
compression_type, filter_method);
png_bytep* row_pointers = (png_bytep*)malloc(sizeof(png_bytep) * height);
for (unsigned int y = 0; y < height; y++)
row_pointers[y] = (png_byte*)&pixels[y * width];
png_set_rows(png_ptr, info_ptr, row_pointers);
int png_transforms = PNG_TRANSFORM_IDENTITY;
png_write_png(png_ptr, info_ptr, png_transforms, NULL);
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
free(row_pointers);
fclose(fp);
return (true);
}
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