From: Siarhei Siamashka <siarhei.siamashka@nokia.com>
Date: Thu, 29 Jul 2010 14:58:13 +0000 (+0300)
Subject: New flags for 90/180/270 rotation
X-Git-Tag: 1.0_branch~328
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e0c7948c970b816f323a6402241ca70fa855c12c;p=profile%2Fivi%2Fpixman.git

New flags for 90/180/270 rotation

These flags are set when the transform is a simple nonscaled 90/180/270
degrees rotation.
---

diff --git a/pixman/pixman-image.c b/pixman/pixman-image.c
index a72299b..e91d87c 100644
--- a/pixman/pixman-image.c
+++ b/pixman/pixman-image.c
@@ -211,8 +211,25 @@ compute_image_info (pixman_image_t *image)
 	    if (image->common.transform->matrix[0][1] == 0 &&
 		image->common.transform->matrix[1][0] == 0)
 	    {
+		if (image->common.transform->matrix[0][0] == -pixman_fixed_1 &&
+		    image->common.transform->matrix[1][1] == -pixman_fixed_1)
+		{
+		    flags |= FAST_PATH_ROTATE_180_TRANSFORM;
+		}
 		flags |= FAST_PATH_SCALE_TRANSFORM;
 	    }
+	    else if (image->common.transform->matrix[0][0] == 0 &&
+	             image->common.transform->matrix[1][1] == 0)
+	    {
+		pixman_fixed_t m01 = image->common.transform->matrix[0][1];
+		if (m01 == -image->common.transform->matrix[1][0])
+		{
+			if (m01 == -pixman_fixed_1)
+			    flags |= FAST_PATH_ROTATE_90_TRANSFORM;
+			else if (m01 == pixman_fixed_1)
+			    flags |= FAST_PATH_ROTATE_270_TRANSFORM;
+		}
+	    }
 	}
 
 	if (image->common.transform->matrix[0][0] > 0)
diff --git a/pixman/pixman-private.h b/pixman/pixman-private.h
index f5d0ba1..1473dc4 100644
--- a/pixman/pixman-private.h
+++ b/pixman/pixman-private.h
@@ -611,6 +611,9 @@ _pixman_iter_get_scanline_noop (pixman_iter_t *iter, const uint32_t *mask);
 #define FAST_PATH_AFFINE_TRANSFORM		(1 << 18)
 #define FAST_PATH_Y_UNIT_ZERO			(1 << 19)
 #define FAST_PATH_BILINEAR_FILTER		(1 << 20)
+#define FAST_PATH_ROTATE_90_TRANSFORM		(1 << 21)
+#define FAST_PATH_ROTATE_180_TRANSFORM		(1 << 22)
+#define FAST_PATH_ROTATE_270_TRANSFORM		(1 << 23)
 
 #define FAST_PATH_PAD_REPEAT						\
     (FAST_PATH_NO_NONE_REPEAT		|				\