xserver pixman git update 7-12-2010

1 files changed, 59 insertions, 5 deletions

diff --git a/xorg-server/randr/rrtransform.c b/xorg-server/randr/rrtransform.c
index 102a0f48e..f78d5f913 100644
--- a/xorg-server/randr/rrtransform.c
+++ b/xorg-server/randr/rrtransform.c
@@ -134,6 +134,24 @@ RRTransformRescale(struct pixman_f_transform *f_transform, double limit)
 	    f_transform->m[j][i] *= scale;

 }

 

+#define EPSILON (1e-20)

+#define IS_F_SAME(a,b)	(fabs((a)-(b)) < EPSILON)

+#define IS_F_ZERO(a)	(fabs(a) < EPSILON)

+

+static Bool

+pict_f_transform_is_identity (const struct pixman_f_transform *t)

+{

+    return (IS_F_SAME (t->m[0][0], t->m[1][1]) &&

+	    IS_F_SAME (t->m[0][0], t->m[2][2]) &&

+	    !IS_F_ZERO (t->m[0][0]) &&

+	    IS_F_ZERO (t->m[0][1]) &&

+	    IS_F_ZERO (t->m[0][2]) &&

+	    IS_F_ZERO (t->m[1][0]) &&

+	    IS_F_ZERO (t->m[1][2]) &&

+	    IS_F_ZERO (t->m[2][0]) &&

+	    IS_F_ZERO (t->m[2][1]));

+}

+

 /*

  * Compute the complete transformation matrix including

  * client-specified transform, rotation/reflection values and the crtc 

@@ -148,23 +166,39 @@ RRTransformCompute (int			    x,
 		    int			    height,

 		    Rotation		    rotation,

 		    RRTransformPtr	    rr_transform,

+		    struct pixman_f_transform *sprite_position_transform,

+		    struct pixman_f_transform *sprite_image_transform,

 

 		    PictTransformPtr	    transform,

 		    struct pixman_f_transform *f_transform,

-		    struct pixman_f_transform *f_inverse)

+		    struct pixman_f_transform *f_inverse,

+		    struct pixman_f_transform *f_fb_to_sprite,

+		    struct pixman_f_transform *f_sprite_to_image,

+		    Bool		      *sprite_transform_in_use)

 {

     PictTransform	    t_transform, inverse;

     struct pixman_f_transform tf_transform, tf_inverse;

+    struct pixman_f_transform sf_position_transform, sf_image_transform;

+    struct pixman_f_transform f_image_to_sprite;

     Bool		    overflow = FALSE;

+    Bool		    ret = TRUE;

 

     if (!transform) transform = &t_transform;

     if (!f_transform) f_transform = &tf_transform;

     if (!f_inverse) f_inverse = &tf_inverse;

+    if (!f_fb_to_sprite) f_fb_to_sprite = &sf_position_transform;

+    if (!f_sprite_to_image) f_sprite_to_image = &sf_image_transform;

+

+    /* invert the sprite image transform to have it go from dest to source */

+    if (!pixman_f_transform_invert (&f_image_to_sprite, f_sprite_to_image))

+	pixman_f_transform_init_identity(&f_image_to_sprite);

 

     pixman_transform_init_identity (transform);

     pixman_transform_init_identity (&inverse);

     pixman_f_transform_init_identity (f_transform);

     pixman_f_transform_init_identity (f_inverse);

+    pixman_f_transform_init_identity (f_fb_to_sprite);

+    pixman_f_transform_init_identity (f_sprite_to_image);

     if (rotation != RR_Rotate_0)

     {

 	double	f_rot_cos, f_rot_sin, f_rot_dx, f_rot_dy;

@@ -246,7 +280,14 @@ RRTransformCompute (int			    x,
 	pixman_f_transform_translate (f_transform, f_inverse, f_scale_dx, f_scale_dy);

     }

     

-#ifdef RANDR_12_INTERFACE

+    /*

+     * Sprite position is affected by the transform matrix,

+     * but the image is not

+     */

+    pixman_f_transform_multiply(f_sprite_to_image,

+				f_transform,

+				&f_image_to_sprite);

+

     if (rr_transform)

     {

         if (!pixman_transform_multiply (transform, &rr_transform->transform, transform))

@@ -254,7 +295,7 @@ RRTransformCompute (int			    x,
 	pixman_f_transform_multiply (f_transform, &rr_transform->f_transform, f_transform);

 	pixman_f_transform_multiply (f_inverse, f_inverse, &rr_transform->f_inverse);

     }

-#endif

+

     /*

      * Compute the class of the resulting transform

      */

@@ -264,7 +305,7 @@ RRTransformCompute (int			    x,
 

 	pixman_f_transform_init_translate (f_transform,  x,  y);

 	pixman_f_transform_init_translate (f_inverse,   -x, -y);

-	return FALSE;

+	ret = FALSE;

     }

     else

     {

@@ -278,6 +319,19 @@ RRTransformCompute (int			    x,
 	    RRTransformRescale(&f_scaled, 16384.0);

 	    pixman_transform_from_pixman_f_transform(transform, &f_scaled);

 	}

-	return TRUE;

+	ret = TRUE;

     }

+

+    /*

+     * Sprite position is affected by the transform matrix,

+     * but the image is not

+     */

+    pixman_f_transform_multiply(f_fb_to_sprite,

+				f_inverse,

+				sprite_position_transform);

+    if (sprite_transform_in_use)

+	*sprite_transform_in_use = ret || !pict_f_transform_is_identity(f_fb_to_sprite);

+    return ret;

 }

+

+