sample client for -vop bmovl -- loads and alphablend any PNG file

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7857 b3059339-0415-0410-9bf9-f77b7e298cf2

TOOLS/bmovl-test/Makefile

@@ -0,0 +1,2 @@
+bmovl-test: bmovl-test.c
+	gcc -O3 -I/usr/local/include/SDL -L/usr/local/lib -lSDL_image -o bmovl-test bmovl-test.c

TOOLS/bmovl-test/bmovl-test.c

@@ -0,0 +1,116 @@
+/* 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 green, 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);
+}