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