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
|
/* Small program to test the features of vf_bmovl */
#include <unistd.h>
#include <fcntl.h>
#include <SDL.h>
#include <SDL_image.h>
#define DEBUG 0
static void
blit(int fifo, unsigned char *bitmap, int width, int height,
int xpos, int ypos, int alpha, int clear)
{
char str[100];
int nbytes;
sprintf(str, "RGBA32 %d %d %d %d %d %d\n",
width, height, xpos, ypos, alpha, clear);
if(DEBUG) printf("Sending %s", str);
write(fifo, str, strlen(str));
nbytes = write(fifo, bitmap, width*height*4);
if(DEBUG) printf("Sent %d bytes of bitmap data...\n", nbytes);
}
static void
set_alpha(int fifo, int width, int height, int xpos, int ypos, int alpha) {
char str[100];
sprintf(str, "ALPHA %d %d %d %d %d\n",
width, height, xpos, ypos, alpha);
if(DEBUG) printf("Sending %s", str);
write(fifo, str, strlen(str));
}
static void
paint(unsigned char* bitmap, int size, int red, int green, int blue, int alpha) {
int i;
for(i=0; i < size; i+=4) {
bitmap[i+0] = red;
bitmap[i+1] = green;
bitmap[i+2] = blue;
bitmap[i+3] = alpha;
}
}
int main(int argc, char **argv) {
int fifo=-1;
int width=0, height=0, xpos=0, ypos=0, alpha=0, clear=0;
unsigned char *bitmap;
SDL_Surface *image;
int i;
if(argc<3) {
printf("Usage: %s <bmovl fifo> <image file> <width> <height>\n", argv[0]);
printf("width and height are w/h of MPlayer's screen!\n");
exit(10);
}
width = atoi(argv[3]);
height = atoi(argv[4]);
fifo = open( argv[1], O_RDWR );
if(!fifo) {
fprintf(stderr, "Error opening FIFO %s!\n", argv[1]);
exit(10);
}
image = IMG_Load(argv[2]);
if(!image) {
fprintf(stderr, "Couldn't load image %s!\n", argv[2]);
exit(10);
}
printf("Loaded image %s: width=%d, height=%d\n", argv[2], image->w, image->h);
// Display and move image
for(i=0; (i < (width - image->w)) && (i < (height - image->h)); i += 5)
blit(fifo, image->pixels, image->w, image->h, i, i, 0, 1);
// Create a 75x75 bitmap
bitmap = (unsigned char*)malloc(75*75*4);
// Paint bitmap red, 50% transparent and blit at position 50,50
paint(bitmap, (75*75*4), 255, 0, 0, 128);
blit(fifo, bitmap, 75, 75, 50, 50, 0, 0);
// Paint bitmap green, 50% transparent and blit at position -50,50
paint(bitmap, (75*75*4), 0, 255, 0, 128);
blit(fifo, bitmap, 75, 75, width-50-75, 50, 0, 0);
// Paint bitmap blue, 50% transparent and blit at position -50,50
paint(bitmap, (75*75*4), 0, 0, 255, 128);
blit(fifo, bitmap, 75, 75, 50, height-50-75, 0, 0);
// Blit another image in the middle, completly transparent
blit(fifo, image->pixels, image->w, image->h,
(width/2)-(image->w/2), (height/2)-(image->h/2), -255, 0);
// Fade in image
for(i=-255; i <= 0; i++)
set_alpha(fifo, image->w, image->h,
(width/2)-(image->w/2), (height/2)-(image->h/2), i);
// Clean up
free(bitmap);
SDL_FreeSurface(image);
}
|
