- release 6 (by relup.sh)

[packages/fbgrab.git] / fbgrab-bigendian.patch

--- fbgrab-1.0/fbgrab.c	2002-04-15 22:22:54.000000000 +0200
+++ fbgrab-1.0/fbgrab.c.new	2006-07-14 02:46:49.000000000 +0200
@@ -163,15 +163,17 @@
 
     for (i=0; i < (unsigned int) height*width*2; i+=2)
     {
-	/* BLUE  = 0 */
-	outbuffer[(i<<1)+0] = (inbuffer[i] & 0x1f) << 3;
-	/* GREEN = 1 */
-        outbuffer[(i<<1)+1] = (((inbuffer[i+1] & 0x7) << 3) | 
-			     (inbuffer[i] & 0xE0) >> 5) << 2;	
-        /* RED   = 2 */
-	outbuffer[(i<<1)+2] = (inbuffer[i+1] & 0xF8);
-	/* ALPHA = 3 */
-	outbuffer[(i<<1)+3] = '\0'; 
+	int16_t v =
+#ifdef __BIG_ENDIAN__
+		(inbuffer[i] << 8) + inbuffer[i+1];
+#else
+		(inbuffer[i+1] << 8) + inbuffer[i];
+#endif
+
+	outbuffer[(i<<1)+0] = (v << 3) & 0xf8; /* B */
+	outbuffer[(i<<1)+1] = (v >> 3) & 0xfc; /* G */
+	outbuffer[(i<<1)+2] = (v >> 8) & 0xf8; /* R */
+	outbuffer[(i<<1)+3] = 0; /* A */
     }
 }
 
@@ -194,6 +196,22 @@
     }
 }
 
+static void convertARGBtoBGRA(int width, int height, 
+			   unsigned char *inbuffer, 
+			   unsigned char *outbuffer)
+{
+    unsigned int i;
+
+    for (i=0; i < (unsigned int) height*width*4; i+=4)
+    {
+        outbuffer[i+0] = inbuffer[i+3];
+        outbuffer[i+1] = inbuffer[i+2];
+        outbuffer[i+2] = inbuffer[i+1];
+        outbuffer[i+3] = inbuffer[i+0];
+    }
+}
+
+
 static void write_PNG(unsigned char *outbuffer, char *filename, 
 				int width, int height, int interlace)
 {
@@ -283,8 +301,13 @@
 	write_PNG(outbuffer, filename, width, height, interlace);
 	break;
     case 32:
+#ifdef __BIG_ENDIAN__
+	convertARGBtoBGRA(width, height, inbuffer, outbuffer);
+	write_PNG(outbuffer, filename, width, height, interlace);
+#else
 	/* No conversion needed */
 	write_PNG(inbuffer, filename, width, height, interlace);
+#endif
 	break;
     default:
 	fprintf(stderr, "%d bits per pixel are not supported! ", bits);