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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
* This file is part of librosprite.
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
* Copyright 2008 James Shaw <js102@zepler.net>
*/
/**
* \file
* A test harness using SDL to display all sprites in a sprite file.
*
* Usage: example \<spritefile\>
*/
#include <stdio.h>
#include <stdlib.h>
#include <SDL/SDL.h>
#include "librosprite.h"
void sdl_draw_pixel(SDL_Surface* surface, uint32_t x, uint32_t y, uint32_t color);
void sdl_blank(SDL_Surface* surface);
int load_file_to_memory(const char *filename, uint8_t **result);
int create_file_context(char* filename, void** result);
int create_mem_context(char* filename, void** result);
int main(int argc, char *argv[])
{
if (argc < 2) {
fprintf(stderr, "Usage: example spritefile\n");
exit(EXIT_FAILURE);
}
if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
fprintf(stderr, "Unable to init SDL: %s\n", SDL_GetError());
exit(EXIT_FAILURE);
}
atexit(SDL_Quit);
char* filename = argv[1];
void* ctx;
if (create_file_context(filename, &ctx) < 0) {
fprintf(stderr, "Unable to create file reader context\n");
exit(EXIT_FAILURE);
}
printf("Loading %s\n", filename);
struct rosprite_area* sprite_area;
if (rosprite_load(rosprite_file_reader, ctx, &sprite_area) != ROSPRITE_OK) {
fprintf(stderr, "Error loading spritefile\n");
exit(EXIT_FAILURE);
};
printf("sprite_count %u\n", sprite_area->sprite_count);
printf("extension_size %u\n", sprite_area->extension_size);
SDL_Surface *screen;
screen = SDL_SetVideoMode(800, 600, 32, SDL_ANYFORMAT);
SDL_SetAlpha(screen, SDL_SRCALPHA, 0);
for (unsigned int i = 0; i < sprite_area->sprite_count; i++) {
struct rosprite* sprite = sprite_area->sprites[i];
printf("\nname %s\n", sprite->name);
printf("color_model %s\n", sprite->mode.color_model == ROSPRITE_RGB ? "RGB" : "CMYK");
printf("colorbpp %u\n", sprite->mode.colorbpp);
printf("xdpi %u\n", sprite->mode.xdpi);
printf("ydpi %u\n", sprite->mode.ydpi);
printf("width %u px\n", sprite->width);
printf("height %u px\n", sprite->height);
printf("hasPalette %s\n", sprite->has_palette ? "YES" : "NO");
if (sprite->has_palette) printf("paletteSize %u\n", sprite->palettesize);
printf("hasMask %s\n", sprite->has_mask ? "YES" : "NO");
if (sprite->has_mask) printf("mask_width %u\n", sprite->mode.mask_width);
if (sprite->has_mask) printf("maskbpp %u\n", sprite->mode.maskbpp);
sdl_blank(screen);
for (uint32_t y = 0; y < sprite->height; y++) {
for (uint32_t x = 0; x < sprite->width; x++) {
sdl_draw_pixel(screen, x, y, sprite->image[y*sprite->width + x]);
}
}
SDL_UpdateRect(screen, 0, 0, 0, 0);
fgetc(stdin);
}
rosprite_destroy_mem_context(ctx);
rosprite_destroy_sprite_area(sprite_area);
return EXIT_SUCCESS;
}
int create_file_context(char* filename, void** result)
{
FILE *f = fopen(filename, "rb");
if (!f) {
*result = NULL;
return -1;
}
struct rosprite_file_context* ctx;
if (rosprite_create_file_context(f, &ctx) != ROSPRITE_OK) {
return -1;
}
*result = ctx;
return 0;
}
int create_mem_context(char* filename, void** result)
{
uint8_t* content;
int size = load_file_to_memory(filename, &content);
if (size < 0) return -1;
struct rosprite_mem_context* ctx;
if (rosprite_create_mem_context(content, size, &ctx) != ROSPRITE_OK) {
return -1;
}
*result = ctx;
return 0;
}
int load_file_to_memory(const char *filename, uint8_t **result)
{
int size = 0;
FILE *f = fopen(filename, "rb");
if (f == NULL)
{
*result = NULL;
return -1; // -1 means file opening fail
}
fseek(f, 0, SEEK_END);
size = ftell(f);
fseek(f, 0, SEEK_SET);
*result = (uint8_t *)malloc(size+1);
if ((unsigned int) size != fread(*result, sizeof(char), size, f))
{
free(*result);
return -2; // -2 means file reading fail
}
fclose(f);
(*result)[size] = 0;
return size;
}
/* color is 0xrrggbbaa */
void sdl_draw_pixel(SDL_Surface* surface, uint32_t x, uint32_t y, uint32_t color)
{
uint32_t* pixel = ((uint32_t*) (surface->pixels)) + (y * surface->pitch/4) + x;
/* pretty sure SDL can do this, but can't figure out how */
uint32_t bg_color = ((int) (x / 4.0) + ((int)(y / 4.0) % 2)) % 2 ? 0x99 : 0x66;
uint32_t alpha = color & 0x000000ff;
uint32_t r = (color & 0xff000000) >> 24;
uint32_t g = (color & 0x00ff0000) >> 16;
uint32_t b = (color & 0x0000ff00) >> 8;
r = ((alpha / 255.0) * r) + (((255-alpha) / 255.0) * bg_color);
g = ((alpha / 255.0) * g) + (((255-alpha) / 255.0) * bg_color);
b = ((alpha / 255.0) * b) + (((255-alpha) / 255.0) * bg_color);
uint32_t mapped_color = SDL_MapRGB(surface->format, r, g, b);
*pixel = mapped_color;
}
void sdl_blank(SDL_Surface* surface)
{
for (uint32_t y = 0; y < (uint32_t) surface->h; y++) {
for (uint32_t x = 0; x < (uint32_t) surface->w; x++) {
sdl_draw_pixel(surface, x, y, (uint32_t) ((int) (x / 4.0) + ((int)(y / 4.0) % 2)) % 2 ? 0x999999ff : 0x666666ff);
}
}
}
|
