xserver-multidpi/randr/rrtransform.c
Keith Packard 9838b7032e Introduce a consistent coding style
This is strictly the application of the script 'x-indent-all.sh'
from util/modular. Compared to the patch that Daniel posted in
January, I've added a few indent flags:

	-bap
	-psl
	-T PrivatePtr
	-T pmWait
	-T _XFUNCPROTOBEGIN
	-T _XFUNCPROTOEND
	-T _X_EXPORT

The typedefs were needed to make the output of sdksyms.sh match the
previous output, otherwise, the code is formatted badly enough that
sdksyms.sh generates incorrect output.

The generated code was compared with the previous version and found to
be essentially identical -- "assert" line numbers and BUILD_TIME were
the only differences found.

The comparison was done with this script:

dir1=$1
dir2=$2

for dir in $dir1 $dir2; do
	(cd $dir && find . -name '*.o' | while read file; do
		dir=`dirname $file`
		base=`basename $file .o`
		dump=$dir/$base.dump
		objdump -d $file > $dump
	done)
done

find $dir1 -name '*.dump' | while read dump; do
	otherdump=`echo $dump | sed "s;$dir1;$dir2;"`
	diff -u $dump $otherdump
done

Signed-off-by: Keith Packard <keithp@keithp.com>
Acked-by: Daniel Stone <daniel@fooishbar.org>
Acked-by: Alan Coopersmith <alan.coopersmith@oracle.com>
2012-03-21 13:54:42 -07:00

298 lines
9.3 KiB
C

/*
* Copyright © 2007 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include "randrstr.h"
#include "rrtransform.h"
void
RRTransformInit(RRTransformPtr transform)
{
pixman_transform_init_identity(&transform->transform);
pixman_f_transform_init_identity(&transform->f_transform);
pixman_f_transform_init_identity(&transform->f_inverse);
transform->filter = NULL;
transform->params = NULL;
transform->nparams = 0;
}
void
RRTransformFini(RRTransformPtr transform)
{
free(transform->params);
}
Bool
RRTransformEqual(RRTransformPtr a, RRTransformPtr b)
{
if (a && pixman_transform_is_identity(&a->transform))
a = NULL;
if (b && pixman_transform_is_identity(&b->transform))
b = NULL;
if (a == NULL && b == NULL)
return TRUE;
if (a == NULL || b == NULL)
return FALSE;
if (memcmp(&a->transform, &b->transform, sizeof(a->transform)) != 0)
return FALSE;
if (a->filter != b->filter)
return FALSE;
if (a->nparams != b->nparams)
return FALSE;
if (memcmp(a->params, b->params, a->nparams * sizeof(xFixed)) != 0)
return FALSE;
return TRUE;
}
Bool
RRTransformSetFilter(RRTransformPtr dst,
PictFilterPtr filter,
xFixed * params, int nparams, int width, int height)
{
xFixed *new_params;
if (nparams) {
new_params = malloc(nparams * sizeof(xFixed));
if (!new_params)
return FALSE;
memcpy(new_params, params, nparams * sizeof(xFixed));
}
else
new_params = NULL;
free(dst->params);
dst->filter = filter;
dst->params = new_params;
dst->nparams = nparams;
dst->width = width;
dst->height = height;
return TRUE;
}
Bool
RRTransformCopy(RRTransformPtr dst, RRTransformPtr src)
{
if (src && pixman_transform_is_identity(&src->transform))
src = NULL;
if (src) {
if (!RRTransformSetFilter(dst, src->filter,
src->params, src->nparams, src->width,
src->height))
return FALSE;
dst->transform = src->transform;
dst->f_transform = src->f_transform;
dst->f_inverse = src->f_inverse;
}
else {
if (!RRTransformSetFilter(dst, NULL, NULL, 0, 0, 0))
return FALSE;
pixman_transform_init_identity(&dst->transform);
pixman_f_transform_init_identity(&dst->f_transform);
pixman_f_transform_init_identity(&dst->f_inverse);
}
return TRUE;
}
#define F(x) IntToxFixed(x)
static void
RRTransformRescale(struct pixman_f_transform *f_transform, double limit)
{
double max = 0, v, scale;
int i, j;
for (j = 0; j < 3; j++)
for (i = 0; i < 3; i++)
if ((v = abs(f_transform->m[j][i])) > max)
max = v;
scale = limit / max;
for (j = 0; j < 3; j++)
for (i = 0; i < 3; i++)
f_transform->m[j][i] *= scale;
}
/*
* Compute the complete transformation matrix including
* client-specified transform, rotation/reflection values and the crtc
* offset.
*
* Return TRUE if the resulting transform is not a simple translation.
*/
Bool
RRTransformCompute(int x,
int y,
int width,
int height,
Rotation rotation,
RRTransformPtr rr_transform,
PictTransformPtr transform,
struct pixman_f_transform *f_transform,
struct pixman_f_transform *f_inverse)
{
PictTransform t_transform, inverse;
struct pixman_f_transform tf_transform, tf_inverse;
Bool overflow = FALSE;
if (!transform)
transform = &t_transform;
if (!f_transform)
f_transform = &tf_transform;
if (!f_inverse)
f_inverse = &tf_inverse;
pixman_transform_init_identity(transform);
pixman_transform_init_identity(&inverse);
pixman_f_transform_init_identity(f_transform);
pixman_f_transform_init_identity(f_inverse);
if (rotation != RR_Rotate_0) {
double f_rot_cos, f_rot_sin, f_rot_dx, f_rot_dy;
double f_scale_x, f_scale_y, f_scale_dx, f_scale_dy;
xFixed rot_cos, rot_sin, rot_dx, rot_dy;
xFixed scale_x, scale_y, scale_dx, scale_dy;
/* rotation */
switch (rotation & 0xf) {
default:
case RR_Rotate_0:
f_rot_cos = 1;
f_rot_sin = 0;
f_rot_dx = 0;
f_rot_dy = 0;
rot_cos = F(1);
rot_sin = F(0);
rot_dx = F(0);
rot_dy = F(0);
break;
case RR_Rotate_90:
f_rot_cos = 0;
f_rot_sin = 1;
f_rot_dx = height;
f_rot_dy = 0;
rot_cos = F(0);
rot_sin = F(1);
rot_dx = F(height);
rot_dy = F(0);
break;
case RR_Rotate_180:
f_rot_cos = -1;
f_rot_sin = 0;
f_rot_dx = width;
f_rot_dy = height;
rot_cos = F(-1);
rot_sin = F(0);
rot_dx = F(width);
rot_dy = F(height);
break;
case RR_Rotate_270:
f_rot_cos = 0;
f_rot_sin = -1;
f_rot_dx = 0;
f_rot_dy = width;
rot_cos = F(0);
rot_sin = F(-1);
rot_dx = F(0);
rot_dy = F(width);
break;
}
pixman_transform_rotate(transform, &inverse, rot_cos, rot_sin);
pixman_transform_translate(transform, &inverse, rot_dx, rot_dy);
pixman_f_transform_rotate(f_transform, f_inverse, f_rot_cos, f_rot_sin);
pixman_f_transform_translate(f_transform, f_inverse, f_rot_dx,
f_rot_dy);
/* reflection */
f_scale_x = 1;
f_scale_dx = 0;
f_scale_y = 1;
f_scale_dy = 0;
scale_x = F(1);
scale_dx = 0;
scale_y = F(1);
scale_dy = 0;
if (rotation & RR_Reflect_X) {
f_scale_x = -1;
scale_x = F(-1);
if (rotation & (RR_Rotate_0 | RR_Rotate_180)) {
f_scale_dx = width;
scale_dx = F(width);
}
else {
f_scale_dx = height;
scale_dx = F(height);
}
}
if (rotation & RR_Reflect_Y) {
f_scale_y = -1;
scale_y = F(-1);
if (rotation & (RR_Rotate_0 | RR_Rotate_180)) {
f_scale_dy = height;
scale_dy = F(height);
}
else {
f_scale_dy = width;
scale_dy = F(width);
}
}
pixman_transform_scale(transform, &inverse, scale_x, scale_y);
pixman_f_transform_scale(f_transform, f_inverse, f_scale_x, f_scale_y);
pixman_transform_translate(transform, &inverse, scale_dx, scale_dy);
pixman_f_transform_translate(f_transform, f_inverse, f_scale_dx,
f_scale_dy);
}
#ifdef RANDR_12_INTERFACE
if (rr_transform) {
if (!pixman_transform_multiply
(transform, &rr_transform->transform, transform))
overflow = TRUE;
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
*/
if (!overflow && pixman_transform_is_identity(transform)) {
pixman_transform_init_translate(transform, F(x), F(y));
pixman_f_transform_init_translate(f_transform, x, y);
pixman_f_transform_init_translate(f_inverse, -x, -y);
return FALSE;
}
else {
pixman_f_transform_translate(f_transform, f_inverse, x, y);
if (!pixman_transform_translate(transform, &inverse, F(x), F(y)))
overflow = TRUE;
if (overflow) {
struct pixman_f_transform f_scaled;
f_scaled = *f_transform;
RRTransformRescale(&f_scaled, 16384.0);
pixman_transform_from_pixman_f_transform(transform, &f_scaled);
}
return TRUE;
}
}