66294afcab
This implements sprite position transformations. Sprite image transforms are passed all the way to the DDX layer, but the images are not yet manipulated before being passed to the drivers. Signed-off-by: Keith Packard <keithp@keithp.com> Reviewed-by: Aaron Plattner <aplattner@nvidia.com>
338 lines
9.9 KiB
C
338 lines
9.9 KiB
C
/*
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* Copyright © 2007 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include "randrstr.h"
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#include "rrtransform.h"
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void
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RRTransformInit (RRTransformPtr transform)
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{
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pixman_transform_init_identity (&transform->transform);
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pixman_f_transform_init_identity (&transform->f_transform);
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pixman_f_transform_init_identity (&transform->f_inverse);
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transform->filter = NULL;
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transform->params = NULL;
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transform->nparams = 0;
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}
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void
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RRTransformFini (RRTransformPtr transform)
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{
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free(transform->params);
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}
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Bool
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RRTransformEqual (RRTransformPtr a, RRTransformPtr b)
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{
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if (a && pixman_transform_is_identity (&a->transform))
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a = NULL;
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if (b && pixman_transform_is_identity (&b->transform))
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b = NULL;
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if (a == NULL && b == NULL)
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return TRUE;
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if (a == NULL || b == NULL)
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return FALSE;
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if (memcmp (&a->transform, &b->transform, sizeof (a->transform)) != 0)
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return FALSE;
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if (a->filter != b->filter)
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return FALSE;
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if (a->nparams != b->nparams)
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return FALSE;
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if (memcmp (a->params, b->params, a->nparams * sizeof (xFixed)) != 0)
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return FALSE;
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return TRUE;
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}
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Bool
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RRTransformSetFilter (RRTransformPtr dst,
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PictFilterPtr filter,
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xFixed *params,
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int nparams,
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int width,
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int height)
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{
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xFixed *new_params;
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if (nparams)
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{
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new_params = malloc(nparams * sizeof (xFixed));
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if (!new_params)
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return FALSE;
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memcpy (new_params, params, nparams * sizeof (xFixed));
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}
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else
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new_params = NULL;
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free(dst->params);
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dst->filter = filter;
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dst->params = new_params;
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dst->nparams = nparams;
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dst->width = width;
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dst->height = height;
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return TRUE;
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}
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Bool
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RRTransformCopy (RRTransformPtr dst, RRTransformPtr src)
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{
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if (src && pixman_transform_is_identity (&src->transform))
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src = NULL;
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if (src)
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{
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if (!RRTransformSetFilter (dst, src->filter,
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src->params, src->nparams, src->width, src->height))
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return FALSE;
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dst->transform = src->transform;
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dst->f_transform = src->f_transform;
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dst->f_inverse = src->f_inverse;
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}
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else
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{
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if (!RRTransformSetFilter (dst, NULL, NULL, 0, 0, 0))
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return FALSE;
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pixman_transform_init_identity (&dst->transform);
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pixman_f_transform_init_identity (&dst->f_transform);
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pixman_f_transform_init_identity (&dst->f_inverse);
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}
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return TRUE;
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}
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#define F(x) IntToxFixed(x)
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static void
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RRTransformRescale(struct pixman_f_transform *f_transform, double limit)
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{
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double max = 0, v, scale;
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int i, j;
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for (j = 0; j < 3; j++)
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for (i = 0; i < 3; i++)
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if ((v = abs (f_transform->m[j][i])) > max)
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max = v;
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scale = limit / max;
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for (j = 0; j < 3; j++)
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for (i = 0; i < 3; i++)
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f_transform->m[j][i] *= scale;
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}
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#define EPSILON (1e-20)
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#define IS_F_SAME(a,b) (fabs((a)-(b)) < EPSILON)
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#define IS_F_ZERO(a) (fabs(a) < EPSILON)
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static Bool
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pict_f_transform_is_identity (const struct pixman_f_transform *t)
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{
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return (IS_F_SAME (t->m[0][0], t->m[1][1]) &&
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IS_F_SAME (t->m[0][0], t->m[2][2]) &&
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!IS_F_ZERO (t->m[0][0]) &&
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IS_F_ZERO (t->m[0][1]) &&
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IS_F_ZERO (t->m[0][2]) &&
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IS_F_ZERO (t->m[1][0]) &&
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IS_F_ZERO (t->m[1][2]) &&
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IS_F_ZERO (t->m[2][0]) &&
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IS_F_ZERO (t->m[2][1]));
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}
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/*
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* Compute the complete transformation matrix including
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* client-specified transform, rotation/reflection values and the crtc
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* offset.
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*
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* Return TRUE if the resulting transform is not a simple translation.
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*/
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Bool
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RRTransformCompute (int x,
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int y,
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int width,
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int height,
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Rotation rotation,
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RRTransformPtr rr_transform,
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struct pixman_f_transform *sprite_position_transform,
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struct pixman_f_transform *sprite_image_transform,
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PictTransformPtr transform,
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struct pixman_f_transform *f_transform,
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struct pixman_f_transform *f_inverse,
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struct pixman_f_transform *f_fb_to_sprite,
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struct pixman_f_transform *f_sprite_to_image,
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Bool *sprite_transform_in_use)
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{
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PictTransform t_transform, inverse;
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struct pixman_f_transform tf_transform, tf_inverse;
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struct pixman_f_transform sf_position_transform, sf_image_transform;
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struct pixman_f_transform f_image_to_sprite;
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Bool overflow = FALSE;
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Bool ret = TRUE;
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if (!transform) transform = &t_transform;
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if (!f_transform) f_transform = &tf_transform;
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if (!f_inverse) f_inverse = &tf_inverse;
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if (!f_fb_to_sprite) f_fb_to_sprite = &sf_position_transform;
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if (!f_sprite_to_image) f_sprite_to_image = &sf_image_transform;
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/* invert the sprite image transform to have it go from dest to source */
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if (!pixman_f_transform_invert (&f_image_to_sprite, f_sprite_to_image))
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pixman_f_transform_init_identity(&f_image_to_sprite);
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pixman_transform_init_identity (transform);
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pixman_transform_init_identity (&inverse);
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pixman_f_transform_init_identity (f_transform);
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pixman_f_transform_init_identity (f_inverse);
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pixman_f_transform_init_identity (f_fb_to_sprite);
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pixman_f_transform_init_identity (f_sprite_to_image);
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if (rotation != RR_Rotate_0)
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{
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double f_rot_cos, f_rot_sin, f_rot_dx, f_rot_dy;
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double f_scale_x, f_scale_y, f_scale_dx, f_scale_dy;
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xFixed rot_cos, rot_sin, rot_dx, rot_dy;
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xFixed scale_x, scale_y, scale_dx, scale_dy;
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/* rotation */
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switch (rotation & 0xf) {
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default:
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case RR_Rotate_0:
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f_rot_cos = 1; f_rot_sin = 0;
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f_rot_dx = 0; f_rot_dy = 0;
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rot_cos = F ( 1); rot_sin = F ( 0);
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rot_dx = F ( 0); rot_dy = F ( 0);
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break;
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case RR_Rotate_90:
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f_rot_cos = 0; f_rot_sin = 1;
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f_rot_dx = height; f_rot_dy = 0;
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rot_cos = F ( 0); rot_sin = F ( 1);
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rot_dx = F ( height); rot_dy = F (0);
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break;
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case RR_Rotate_180:
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f_rot_cos = -1; f_rot_sin = 0;
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f_rot_dx = width; f_rot_dy = height;
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rot_cos = F (-1); rot_sin = F ( 0);
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rot_dx = F (width); rot_dy = F ( height);
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break;
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case RR_Rotate_270:
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f_rot_cos = 0; f_rot_sin = -1;
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f_rot_dx = 0; f_rot_dy = width;
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rot_cos = F ( 0); rot_sin = F (-1);
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rot_dx = F ( 0); rot_dy = F ( width);
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break;
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}
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pixman_transform_rotate (transform, &inverse, rot_cos, rot_sin);
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pixman_transform_translate (transform, &inverse, rot_dx, rot_dy);
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pixman_f_transform_rotate (f_transform, f_inverse, f_rot_cos, f_rot_sin);
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pixman_f_transform_translate (f_transform, f_inverse, f_rot_dx, f_rot_dy);
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/* reflection */
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f_scale_x = 1;
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f_scale_dx = 0;
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f_scale_y = 1;
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f_scale_dy = 0;
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scale_x = F (1);
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scale_dx = 0;
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scale_y = F (1);
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scale_dy = 0;
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if (rotation & RR_Reflect_X)
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{
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f_scale_x = -1;
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scale_x = F(-1);
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if (rotation & (RR_Rotate_0|RR_Rotate_180)) {
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f_scale_dx = width;
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scale_dx = F(width);
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} else {
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f_scale_dx = height;
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scale_dx = F(height);
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}
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}
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if (rotation & RR_Reflect_Y)
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{
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f_scale_y = -1;
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scale_y = F(-1);
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if (rotation & (RR_Rotate_0|RR_Rotate_180)) {
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f_scale_dy = height;
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scale_dy = F(height);
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} else {
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f_scale_dy = width;
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scale_dy = F(width);
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}
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}
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pixman_transform_scale (transform, &inverse, scale_x, scale_y);
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pixman_f_transform_scale (f_transform, f_inverse, f_scale_x, f_scale_y);
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pixman_transform_translate (transform, &inverse, scale_dx, scale_dy);
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pixman_f_transform_translate (f_transform, f_inverse, f_scale_dx, f_scale_dy);
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}
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/*
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* Sprite position is affected by the transform matrix,
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* but the image is not
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*/
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pixman_f_transform_multiply(f_sprite_to_image,
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f_transform,
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&f_image_to_sprite);
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if (rr_transform)
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{
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if (!pixman_transform_multiply (transform, &rr_transform->transform, transform))
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overflow = TRUE;
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pixman_f_transform_multiply (f_transform, &rr_transform->f_transform, f_transform);
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pixman_f_transform_multiply (f_inverse, f_inverse, &rr_transform->f_inverse);
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}
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/*
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* Compute the class of the resulting transform
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*/
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if (!overflow && pixman_transform_is_identity (transform))
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{
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pixman_transform_init_translate (transform, F ( x), F ( y));
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pixman_f_transform_init_translate (f_transform, x, y);
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pixman_f_transform_init_translate (f_inverse, -x, -y);
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ret = FALSE;
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}
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else
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{
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pixman_f_transform_translate (f_transform, f_inverse, x, y);
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if (!pixman_transform_translate (transform, &inverse, F(x), F(y)))
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overflow = TRUE;
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if (overflow)
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{
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struct pixman_f_transform f_scaled;
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f_scaled = *f_transform;
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RRTransformRescale(&f_scaled, 16384.0);
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pixman_transform_from_pixman_f_transform(transform, &f_scaled);
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}
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ret = TRUE;
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}
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/*
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* Sprite position is affected by the transform matrix,
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* but the image is not
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*/
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pixman_f_transform_multiply(f_fb_to_sprite,
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f_inverse,
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sprite_position_transform);
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if (sprite_transform_in_use)
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*sprite_transform_in_use = ret || !pict_f_transform_is_identity(f_fb_to_sprite);
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return ret;
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}
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