diff options
Diffstat (limited to 'xorg-server/randr/rrtransform.c')
| -rw-r--r-- | xorg-server/randr/rrtransform.c | 64 |
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;
}
+
+
|