1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
#include <png.h>
#include "types.h"
#include "action.h"
#include "canvas.h"
#include "debug.h"
#define COORD(x,y) ((x) + (y) * c->w)
uint8
canvas_export_png(Canvas *c, const char *path)
{
/* TODO: use a defer */
uint xcnt, ycnt, cnt, w, h, i, j, k, l, col;
FILE *file;
png_structp png_ptr;
png_infop info_ptr;
uint *data, **row_ptr;
if (c == NULL)
return 1;
if (c->layer_arr_cnt == 0 || c->frame_arr_cnt == 0)
return 1;
file = fopen(path, "wb");
if (!file)
return 1;
cnt = xcnt = ycnt = 0;
for (i = 0; i < c->frame_arr_cnt; i++) {
cnt++;
if (c->frames[i].state || i+1 == c->frame_arr_cnt) {
++ycnt;
xcnt = (cnt > xcnt) ? cnt : xcnt;
cnt = 0;
}
}
w = xcnt * c->w;
h = ycnt * c->h;
data = malloc(h*w*sizeof *data);
if (data == NULL) {
fclose(file);
return 1;
}
row_ptr = malloc(h*sizeof *row_ptr);
if (row_ptr == NULL) {
fclose(file);
free(data);
return 1;
}
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr) {
fclose(file);
free(data);
free(row_ptr);
return 1;
}
info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr) {
png_destroy_write_struct(&png_ptr, NULL);
fclose(file);
free(data);
free(row_ptr);
return 1;
}
if (setjmp(png_jmpbuf(png_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(file);
free(data);
free(row_ptr);
return 1;
}
png_init_io(png_ptr, file);
png_set_IHDR(png_ptr, info_ptr, w, h,
8, PNG_COLOR_TYPE_RGBA, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
/* png_set_invert_alpha(png_ptr);*/
png_write_info(png_ptr, info_ptr);
/* png_set_swap(png_ptr);*/
for (i = 0; i < w * h; i++)
data[i] = 0;
for (i = 0; i < h; i++)
row_ptr[i] = &data[i * w];
ycnt = cnt = 0;
for (i = 0; i < c->frame_arr_cnt; i++) {
for (k = 0; k < c->h; k++) {
for (j = 0; j < c->w; j++) {
col = 0;
for (l = 0; l < c->layer_arr_cnt; l++)
if (c->layers[l].visible)
col = canvas_blend_color(col,
c->cells[c->layer_arr_cnt * i + l][COORD(j, k)]);
data[(ycnt * c->h + k) * w + cnt * c->w + j] =
((col&255)<<24) | (((col>>8)&255)<<16) | (((col>>16)&255)<<8) | (((col>>24)&255));
}
}
if (c->frames[i].state || i+1 == c->frame_arr_cnt) {
++ycnt;
cnt = 0;
} else {
cnt++;
}
}
png_write_image(png_ptr, row_ptr);
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
fclose(file);
free(data);
free(row_ptr);
return 0;
}
|
