TOOLS/bmovl-test.c

   1 /* Small program to test the features of vf_bmovl */
   2
   3 #include <unistd.h>
   4 #include <fcntl.h>
   5 #include <string.h>
   6 #include <stdlib.h>
   7 #include <SDL/SDL.h>
   8 #include <SDL/SDL_image.h>
   9
  10 #define DEBUG 0
  11
  12 static void
  13 blit(int fifo, unsigned char *bitmap, int width, int height,
  14      int xpos, int ypos, int alpha, int clear)
  15 {
  16         char str[100];
  17         int  nbytes;
  18
  19         sprintf(str, "RGBA32 %d %d %d %d %d %d\n",
  20                 width, height, xpos, ypos, alpha, clear);
  21
  22         if(DEBUG) printf("Sending %s", str);
  23
  24         write(fifo, str, strlen(str));
  25         nbytes = write(fifo, bitmap, width*height*4);
  26
  27         if(DEBUG) printf("Sent %d bytes of bitmap data...\n", nbytes);
  28 }
  29
  30 static void
  31 set_alpha(int fifo, int width, int height, int xpos, int ypos, int alpha) {
  32         char str[100];
  33
  34         sprintf(str, "ALPHA %d %d %d %d %d\n",
  35                 width, height, xpos, ypos, alpha);
  36
  37         if(DEBUG) printf("Sending %s", str);
  38
  39         write(fifo, str, strlen(str));
  40 }
  41
  42 static void
  43 paint(unsigned char* bitmap, int size, int red, int green, int blue, int alpha) {
  44
  45         int i;
  46
  47         for(i=0; i < size; i+=4) {
  48                 bitmap[i+0] = red;
  49                 bitmap[i+1] = green;
  50                 bitmap[i+2] = blue;
  51                 bitmap[i+3] = alpha;
  52         }
  53 }
  54
  55 int main(int argc, char **argv) {
  56
  57         int fifo=-1;
  58         int width=0, height=0;
  59         unsigned char *bitmap;
  60         SDL_Surface *image;
  61         int i;
  62
  63         if(argc<3) {
  64                 printf("Usage: %s <bmovl fifo> <image file> <width> <height>\n", argv[0]);
  65                 printf("width and height are w/h of MPlayer's screen!\n");
  66                 exit(10);
  67         }
  68
  69         width = atoi(argv[3]);
  70         height = atoi(argv[4]);
  71
  72         fifo = open( argv[1], O_RDWR );
  73         if(!fifo) {
  74                 fprintf(stderr, "Error opening FIFO %s!\n", argv[1]);
  75                 exit(10);
  76         }
  77
  78         image = IMG_Load(argv[2]);
  79         if(!image) {
  80                 fprintf(stderr, "Couldn't load image %s!\n", argv[2]);
  81                 exit(10);
  82         }
  83
  84         printf("Loaded image %s: width=%d, height=%d\n", argv[2], image->w, image->h);
  85
  86         // Display and move image
  87         for(i=0; (i < (width - image->w)) && (i < (height - image->h)); i += 5)
  88                 blit(fifo, image->pixels, image->w, image->h, i, i, 0, 1);
  89
  90         // Create a 75x75 bitmap
  91         bitmap = (unsigned char*)malloc(75*75*4);
  92
  93         // Paint bitmap red, 50% transparent and blit at position 50,50
  94         paint(bitmap, (75*75*4), 255, 0, 0, 128);
  95         blit(fifo, bitmap, 75, 75, 50, 50, 0, 0);
  96
  97         // Paint bitmap green, 50% transparent and blit at position -50,50
  98         paint(bitmap, (75*75*4), 0, 255, 0, 128);
  99         blit(fifo, bitmap, 75, 75, width-50-75, 50, 0, 0);
 100
 101         // Paint bitmap blue, 50% transparent and blit at position -50,50
 102         paint(bitmap, (75*75*4), 0, 0, 255, 128);
 103         blit(fifo, bitmap, 75, 75, 50, height-50-75, 0, 0);
 104
 105         // Blit another image in the middle, completly transparent
 106         blit(fifo, image->pixels, image->w, image->h,
 107                    (width/2)-(image->w/2), (height/2)-(image->h/2), -255, 0);
 108
 109         // Fade in image
 110         for(i=-255; i <= 0; i++)
 111                 set_alpha(fifo, image->w, image->h,
 112                           (width/2)-(image->w/2), (height/2)-(image->h/2), i);
 113
 114
 115         // Clean up
 116         free(bitmap);
 117         SDL_FreeSurface(image);
 118
 119         return 0;
 120 }