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
178
179
180
181
182
183
184
185
186
187
|
#include "backend_freeimage.h"
#include "backend.h"
#include "source.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <FreeImage.h>
#include <SDL2/SDL.h>
struct private {
FREE_IMAGE_FORMAT format;
FIMULTIBITMAP *multibitmap;
FIBITMAP *last_frame;
int raw_frame_time;
};
static void time_passed(struct imv_source *src, double dt)
{
(void)src;
(void)dt;
}
static double time_left(struct imv_source *src)
{
(void)src;
return 0.0;
}
static void source_free(struct imv_source *src)
{
free(src->name);
src->name = NULL;
struct private *private = src->private;
if (private->multibitmap) {
FreeImage_CloseMultiBitmap(private->multibitmap, 0);
private->multibitmap = NULL;
}
if (private->last_frame) {
FreeImage_Unload(private->last_frame);
private->last_frame = NULL;
}
free(private);
src->private = NULL;
free(src);
}
static struct imv_bitmap *to_imv_bitmap(FIBITMAP *in_bmp)
{
struct imv_bitmap *bmp = malloc(sizeof(struct imv_bitmap));
bmp->width = FreeImage_GetWidth(in_bmp);
bmp->height = FreeImage_GetHeight(in_bmp);
bmp->data = malloc(4 * bmp->width * bmp->height);
FreeImage_ConvertToRawBits(bmp->data, in_bmp, 4 * bmp->width, 32,
FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK, TRUE);
return bmp;
}
static void report_error(struct imv_source *src)
{
SDL_Event event;
SDL_zero(event);
event.type = src->error_event_id;
event.user.data1 = strdup(src->name);
SDL_PushEvent(&event);
}
static void send_bitmap(struct imv_source *src, FIBITMAP *fibitmap, int is_new_image)
{
SDL_Event event;
SDL_zero(event);
event.type = src->image_event_id;
event.user.data1 = to_imv_bitmap(fibitmap);
event.user.code = is_new_image;
FreeImage_Unload(fibitmap);
SDL_PushEvent(&event);
}
static void first_frame(struct imv_source *src)
{
FIBITMAP *bmp = NULL;
struct private *private = src->private;
if (private->format == FIF_GIF) {
private->multibitmap = FreeImage_OpenMultiBitmap(FIF_GIF, src->name,
/* don't create file */ 0,
/* read only */ 1,
/* keep in memory */ 1,
/* flags */ GIF_LOAD256);
if (!private->multibitmap) {
report_error(src);
return;
}
FIBITMAP *frame = FreeImage_LockPage(private->multibitmap, 0);
src->num_frames = FreeImage_GetPageCount(private->multibitmap);
/* Get duration of first frame */
FITAG *tag = NULL;
FreeImage_GetMetadata(FIMD_ANIMATION, frame, "FrameTime", &tag);
if(FreeImage_GetTagValue(tag)) {
private->raw_frame_time = *(int*)FreeImage_GetTagValue(tag);
} else {
private->raw_frame_time = 100; /* default value for gifs */
}
bmp = FreeImage_ConvertTo24Bits(frame);
FreeImage_UnlockPage(private->multibitmap, frame, 0);
} else { /* not a gif */
src->num_frames = 1;
int flags = (private->format == FIF_JPEG) ? JPEG_EXIFROTATE : 0;
FIBITMAP *fibitmap = FreeImage_Load(private->format, src->name, flags);
if (!fibitmap) {
report_error(src);
return;
}
bmp = FreeImage_ConvertTo32Bits(fibitmap);
FreeImage_Unload(fibitmap);
}
src->width = FreeImage_GetWidth(bmp);
src->height = FreeImage_GetWidth(bmp);
send_bitmap(src, bmp, 1 /* is new image */);
private->last_frame = bmp;
}
static void next_frame(struct imv_source *src)
{
struct private *private = src->private;
if (src->num_frames == 1) {
send_bitmap(private->last_frame, 0 /* not a new image */);
return;
}
// TODO gifs
}
static enum backend_result open_path(const char *path, struct imv_source **src)
{
FREE_IMAGE_FORMAT fmt = FreeImage_GetFileType(path, 0);
if (fmt == FIF_UNKNOWN) {
return BACKEND_UNSUPPORTED;
}
struct private *private = calloc(sizeof(struct private), 1);
private->format = fmt;
struct imv_source *source = calloc(sizeof(struct imv_source), 1);
source->name = strdup(path);
source->width = 0;
source->height = 0;
source->num_frames = 0;
source->image_event_id = 0;
source->error_event_id = 0;
source->load_first_frame = &first_frame;
source->load_next_frame = &next_frame;
source->time_passed = &time_passed;
source->time_left = &time_left;
source->free = &source_free;
source->private = private;
*src = source;
return BACKEND_SUCCESS;
}
static void backend_free(struct imv_backend *backend)
{
free(backend);
}
struct imv_backend *imv_backend_freeimage(void)
{
struct imv_backend *backend = malloc(sizeof(struct imv_backend));
backend->name = "FreeImage (GPL license)";
backend->open_path = &open_path;
backend->free = &backend_free;
return backend;
}
|
