* Add working sample program dithering.php (open logo-caca.png with Gd and

render it with caca caca_dither_bitmap_gd)
* Add a function to fetch a buffer of gd pixels in php_caca.c

caca-php/examples/dithering.php

@@ -1,15 +1,18 @@
 #!/usr/bin/php5
 <?
 $img = imagecreatefrompng(dirname(__FILE__)."/logo-caca.png");
-//$img = imagecreatefromjpeg("/home/nicolas/images/Clown Fish-mini.jpg");
 $canvas = caca_create_canvas(0, 0);
 
-$dither = caca_create_dither(16, 128, 128, 3 * 256, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000);
-caca_set_dither_gamma($dither, -1.0);
+$dither = caca_create_dither(32, 128, 128, 4 * 128, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x00000000);
+
+$display = caca_create_display($canvas);
+caca_set_display_time($display, 80000);
+
+caca_dither_bitmap_gd($canvas, 0, 0, caca_get_canvas_width($canvas), caca_get_canvas_height($canvas), $dither, $img);
+caca_refresh_display($display);
+
+sleep(5);
+
+
 
-if (caca_dither_bitmap_gd($canvas, 0, 0, 30, 30, $dither, $img)) {
-	$dp = caca_create_display($canvas);
-	caca_refresh_display($dp);
-	sleep(5);
-}
 

caca-php/php_caca.c

@@ -343,16 +343,36 @@ PHP_MINIT_FUNCTION(caca) {
 #define RETURN_SUCCESS(i) \
 	RETURN_BOOL((i) == 0);
 
-//------- Function that allows to fetch external php resources such as gd resouces
+//---------- Some usefull functions --------------------//
+
+//Fetch external php resources such as gd resouces
 
 void *fetch_external_resource(zval *_zval, char const *type_name) {
 	int resource_id = _zval->value.lval;
 	int resource_type;
 	void *result = zend_list_find(resource_id, &resource_type);
+	if (!result) 
+		return NULL;
 	char *resource_type_name = zend_rsrc_list_get_rsrc_type(resource_id);
 	return (strcmp(resource_type_name, type_name) == 0) ? result : NULL;
 }
 
+//Fetch buffer of pixels from gdImage
+
+void *gd_get_pixels(gdImage *img) {
+	if (img->trueColor) {
+		int line_size = img->sx * sizeof(int);
+		void *result = malloc(img->sy * line_size);
+		int j;		
+		for (j = 0; j < img->sy; j++)
+			memcpy(result + (j * line_size), (const void *) img->tpixels[j], line_size);
+		return result;
+	}
+	return NULL;
+}
+
+
+
 //------- PHP Binding's specific functions ----------//
 
 PHP_FUNCTION(caca_create_event) {
@@ -1162,11 +1182,14 @@ PHP_FUNCTION(caca_dither_bitmap_gd) {
 		RETURN_FALSE;
 	}
 
-	printf("image size: %i x %i\n", img->sx, img->sy);
-	if (img->trueColor) {
-		printf("image is true color\n");
-		RETURN_SUCCESS(caca_dither_bitmap(canvas, x, y, w, h, dither, (void *) *(img->tpixels)));
+	void *pixels = gd_get_pixels(img);
+	if (!pixels) {
+		RETURN_FALSE;
 	}
+
+	caca_dither_bitmap(canvas, x, y, w, h, dither, pixels);
+	free(pixels);
+	RETURN_TRUE;
 }
 
 PHP_FUNCTION(caca_get_font_list) {