/*
* Copyright © 2006 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.
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#else
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#endif
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include "xf86.h"
#include "xf86DDC.h"
#include "fb.h"
#include "windowstr.h"
#include "xf86Crtc.h"
#include "xf86Modes.h"
#include "xf86RandR12.h"
#include "X11/extensions/render.h"
#define DPMS_SERVER
#include "X11/extensions/dpms.h"
#include "X11/Xatom.h"
/* borrowed from composite extension, move to Render and publish? */
static VisualPtr
compGetWindowVisual (WindowPtr pWin)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
VisualID vid = wVisual (pWin);
int i;
for (i = 0; i < pScreen->numVisuals; i++)
if (pScreen->visuals[i].vid == vid)
return &pScreen->visuals[i];
return 0;
}
static PictFormatPtr
compWindowFormat (WindowPtr pWin)
{
ScreenPtr pScreen = pWin->drawable.pScreen;
return PictureMatchVisual (pScreen, pWin->drawable.depth,
compGetWindowVisual (pWin));
}
#define F(x) IntToxFixed(x)
static void
PictureTransformIdentity (PictTransformPtr matrix)
{
int i;
memset (matrix, '\0', sizeof (PictTransform));
for (i = 0; i < 3; i++)
matrix->matrix[i][i] = F(1);
}
static Bool
PictureTransformMultiply (PictTransformPtr dst, PictTransformPtr l, PictTransformPtr r)
{
PictTransform d;
int dx, dy;
int o;
for (dy = 0; dy < 3; dy++)
for (dx = 0; dx < 3; dx++)
{
xFixed_48_16 v;
xFixed_32_32 partial;
v = 0;
for (o = 0; o < 3; o++)
{
partial = (xFixed_32_32) l->matrix[dy][o] * (xFixed_32_32) r->matrix[o][dx];
v += partial >> 16;
}
if (v > MAX_FIXED_48_16 || v < MIN_FIXED_48_16)
return FALSE;
d.matrix[dy][dx] = (xFixed) v;
}
*dst = d;
return TRUE;
}
static void
PictureTransformInitScale (PictTransformPtr t, xFixed sx, xFixed sy)
{
memset (t, '\0', sizeof (PictTransform));
t->matrix[0][0] = sx;
t->matrix[1][1] = sy;
t->matrix[2][2] = F (1);
}
static xFixed
fixed_inverse (xFixed x)
{
return (xFixed) ((((xFixed_48_16) F(1)) * F(1)) / x);
}
static Bool
PictureTransformScale (PictTransformPtr forward,
PictTransformPtr reverse,
xFixed sx, xFixed sy)
{
PictTransform t;
PictureTransformInitScale (&t, sx, sy);
if (!PictureTransformMultiply (forward, &t, forward))
return FALSE;
PictureTransformInitScale (&t, fixed_inverse (sx), fixed_inverse (sy));
if (!PictureTransformMultiply (reverse, reverse, &t))
return FALSE;
return TRUE;
}
static void
PictureTransformInitRotate (PictTransformPtr t, xFixed c, xFixed s)
{
memset (t, '\0', sizeof (PictTransform));
t->matrix[0][0] = c;
t->matrix[0][1] = -s;
t->matrix[1][0] = s;
t->matrix[1][1] = c;
t->matrix[2][2] = F (1);
}
static Bool
PictureTransformRotate (PictTransformPtr forward,
PictTransformPtr reverse,
xFixed c, xFixed s)
{
PictTransform t;
PictureTransformInitRotate (&t, c, s);
if (!PictureTransformMultiply (forward, &t, forward))
return FALSE;
PictureTransformInitRotate (&t, c, -s);
if (!PictureTransformMultiply (reverse, reverse, &t))
return FALSE;
return TRUE;
}
static void
PictureTransformInitTranslate (PictTransformPtr t, xFixed tx, xFixed ty)
{
memset (t, '\0', sizeof (PictTransform));
t->matrix[0][0] = F (1);
t->matrix[0][2] = tx;
t->matrix[1][1] = F (1);
t->matrix[1][2] = ty;
t->matrix[2][2] = F (1);
}
static Bool
PictureTransformTranslate (PictTransformPtr forward,
PictTransformPtr reverse,
xFixed tx, xFixed ty)
{
PictTransform t;
PictureTransformInitTranslate (&t, tx, ty);
if (!PictureTransformMultiply (forward, &t, forward))
return FALSE;
PictureTransformInitTranslate (&t, -tx, -ty);
if (!PictureTransformMultiply (reverse, reverse, &t))
return FALSE;
return TRUE;
}
static void
PictureTransformBounds (BoxPtr b, PictTransformPtr matrix)
{
PictVector v[4];
int i;
int x1, y1, x2, y2;
v[0].vector[0] = F (b->x1); v[0].vector[1] = F (b->y1); v[0].vector[2] = F(1);
v[1].vector[0] = F (b->x2); v[1].vector[1] = F (b->y1); v[1].vector[2] = F(1);
v[2].vector[0] = F (b->x2); v[2].vector[1] = F (b->y2); v[2].vector[2] = F(1);
v[3].vector[0] = F (b->x1); v[3].vector[1] = F (b->y2); v[3].vector[2] = F(1);
for (i = 0; i < 4; i++)
{
PictureTransformPoint (matrix, &v[i]);
x1 = xFixedToInt (v[i].vector[0]);
y1 = xFixedToInt (v[i].vector[1]);
x2 = xFixedToInt (xFixedCeil (v[i].vector[0]));
y2 = xFixedToInt (xFixedCeil (v[i].vector[1]));
if (i == 0)
{
b->x1 = x1; b->y1 = y1;
b->x2 = x2; b->y2 = y2;
}
else
{
if (x1 < b->x1) b->x1 = x1;
if (y1 < b->y1) b->y1 = y1;
if (x2 > b->x2) b->x2 = x2;
if (y2 > b->y2) b->y2 = y2;
}
}
}
static Bool
PictureTransformIsIdentity(PictTransform *t)
{
return ((t->matrix[0][0] == t->matrix[1][1]) &&
(t->matrix[0][0] == t->matrix[2][2]) &&
(t->matrix[0][0] != 0) &&
(t->matrix[0][1] == 0) &&
(t->matrix[0][2] == 0) &&
(t->matrix[1][0] == 0) &&
(t->matrix[1][2] == 0) &&
(t->matrix[2][0] == 0) &&
(t->matrix[2][1] == 0));
}
#define toF(x) ((float) (x) / 65536.0f)
static void
PictureTransformErrorF (PictTransform *t)
{
ErrorF ("{ { %f %f %f } { %f %f %f } { %f %f %f } }",
toF(t->matrix[0][0]), toF(t->matrix[0][1]), toF(t->matrix[0][2]),
toF(t->matrix[1][0]), toF(t->matrix[1][1]), toF(t->matrix[1][2]),
toF(t->matrix[2][0]), toF(t->matrix[2][1]), toF(t->matrix[2][2]));
}
static Bool
PictureTransformIsInverse (char *where, PictTransform *a, PictTransform *b)
{
PictTransform t;
PictureTransformMultiply (&t, a, b);
if (!PictureTransformIsIdentity (&t))
{
ErrorF ("%s: ", where);
PictureTransformErrorF (a);
ErrorF (" * ");
PictureTransformErrorF (b);
ErrorF (" = ");
PictureTransformErrorF (a);
ErrorF ("\n");
return FALSE;
}
return TRUE;
}
static void
xf86RotateCrtcRedisplay (xf86CrtcPtr crtc, RegionPtr region)
{
ScrnInfoPtr scrn = crtc->scrn;
ScreenPtr screen = scrn->pScreen;
WindowPtr root = WindowTable[screen->myNum];
PixmapPtr dst_pixmap = crtc->rotatedPixmap;
PictFormatPtr format = compWindowFormat (WindowTable[screen->myNum]);
int error;
PicturePtr src, dst;
int n = REGION_NUM_RECTS(region);
BoxPtr b = REGION_RECTS(region);
XID include_inferiors = IncludeInferiors;
src = CreatePicture (None,
&root->drawable,
format,
CPSubwindowMode,
&include_inferiors,
serverClient,
&error);
if (!src)
return;
dst = CreatePicture (None,
&dst_pixmap->drawable,
format,
0L,
NULL,
serverClient,
&error);
if (!dst)
return;
error = SetPictureTransform (src, &crtc->crtc_to_framebuffer);
if (error)
return;
while (n--)
{
BoxRec dst_box;
dst_box = *b;
PictureTransformBounds (&dst_box, &crtc->framebuffer_to_crtc);
CompositePicture (PictOpSrc,
src, NULL, dst,
dst_box.x1, dst_box.y1, 0, 0, dst_box.x1, dst_box.y1,
dst_box.x2 - dst_box.x1,
dst_box.y2 - dst_box.y1);
b++;
}
FreePicture (src, None);
FreePicture (dst, None);
}
static void
xf86CrtcDamageShadow (xf86CrtcPtr crtc)
{
ScrnInfoPtr pScrn = crtc->scrn;
BoxRec damage_box;
RegionRec damage_region;
ScreenPtr pScreen = pScrn->pScreen;
damage_box.x1 = crtc->x;
damage_box.x2 = crtc->x + xf86ModeWidth (&crtc->mode, crtc->rotation);
damage_box.y1 = crtc->y;
damage_box.y2 = crtc->y + xf86ModeHeight (&crtc->mode, crtc->rotation);
REGION_INIT (pScreen, &damage_region, &damage_box, 1);
DamageDamageRegion (&(*pScreen->GetScreenPixmap)(pScreen)->drawable,
&damage_region);
REGION_UNINIT (pScreen, &damage_region);
}
static void
xf86RotatePrepare (ScreenPtr pScreen)
{
ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
int c;
for (c = 0; c < xf86_config->num_crtc; c++)
{
xf86CrtcPtr crtc = xf86_config->crtc[c];
if (crtc->rotatedData && !crtc->rotatedPixmap)
{
crtc->rotatedPixmap = crtc->funcs->shadow_create (crtc,
crtc->rotatedData,
crtc->mode.HDisplay,
crtc->mode.VDisplay);
if (!xf86_config->rotation_damage_registered)
{
/* Hook damage to screen pixmap */
DamageRegister (&(*pScreen->GetScreenPixmap)(pScreen)->drawable,
xf86_config->rotation_damage);
xf86_config->rotation_damage_registered = TRUE;
}
xf86CrtcDamageShadow (crtc);
}
}
}
static Bool
xf86RotateRedisplay(ScreenPtr pScreen)
{
ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
DamagePtr damage = xf86_config->rotation_damage;
RegionPtr region;
if (!damage)
return FALSE;
xf86RotatePrepare (pScreen);
region = DamageRegion(damage);
if (REGION_NOTEMPTY(pScreen, region))
{
int c;
SourceValidateProcPtr SourceValidate;
/*
* SourceValidate is used by the software cursor code
* to pull the cursor off of the screen when reading
* bits from the frame buffer. Bypassing this function
* leaves the software cursor in place
*/
SourceValidate = pScreen->SourceValidate;
pScreen->SourceValidate = NULL;
for (c = 0; c < xf86_config->num_crtc; c++)
{
xf86CrtcPtr crtc = xf86_config->crtc[c];
if (crtc->rotation != RR_Rotate_0 && crtc->enabled)
{
RegionRec crtc_damage;
/* compute portion of damage that overlaps crtc */
REGION_INIT(pScreen, &crtc_damage, &crtc->bounds, 1);
REGION_INTERSECT (pScreen, &crtc_damage, &crtc_damage, region);
/* update damaged region */
if (REGION_NOTEMPTY(pScreen, &crtc_damage))
xf86RotateCrtcRedisplay (crtc, &crtc_damage);
REGION_UNINIT (pScreen, &crtc_damage);
}
}
pScreen->SourceValidate = SourceValidate;
DamageEmpty(damage);
}
return TRUE;
}
static void
xf86RotateBlockHandler(int screenNum, pointer blockData,
pointer pTimeout, pointer pReadmask)
{
ScreenPtr pScreen = screenInfo.screens[screenNum];
ScrnInfoPtr pScrn = xf86Screens[screenNum];
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
pScreen->BlockHandler = xf86_config->BlockHandler;
(*pScreen->BlockHandler) (screenNum, blockData, pTimeout, pReadmask);
if (xf86RotateRedisplay(pScreen))
{
/* Re-wrap if rotation is still happening */
xf86_config->BlockHandler = pScreen->BlockHandler;
pScreen->BlockHandler = xf86RotateBlockHandler;
}
}
static void
xf86RotateDestroy (xf86CrtcPtr crtc)
{
ScrnInfoPtr pScrn = crtc->scrn;
ScreenPtr pScreen = pScrn->pScreen;
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
int c;
/* Free memory from rotation */
if (crtc->rotatedPixmap || crtc->rotatedData)
{
crtc->funcs->shadow_destroy (crtc, crtc->rotatedPixmap, crtc->rotatedData);
crtc->rotatedPixmap = NULL;
crtc->rotatedData = NULL;
}
for (c = 0; c < xf86_config->num_crtc; c++)
if (xf86_config->crtc[c]->rotatedPixmap ||
xf86_config->crtc[c]->rotatedData)
return;
/*
* Clean up damage structures when no crtcs are rotated
*/
if (xf86_config->rotation_damage)
{
/* Free damage structure */
if (xf86_config->rotation_damage_registered)
{
DamageUnregister (&(*pScreen->GetScreenPixmap)(pScreen)->drawable,
xf86_config->rotation_damage);
xf86_config->rotation_damage_registered = FALSE;
}
DamageDestroy (xf86_config->rotation_damage);
xf86_config->rotation_damage = NULL;
}
}
_X_EXPORT void
xf86RotateCloseScreen (ScreenPtr screen)
{
ScrnInfoPtr scrn = xf86Screens[screen->myNum];
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
int c;
for (c = 0; c < xf86_config->num_crtc; c++)
xf86RotateDestroy (xf86_config->crtc[c]);
}
_X_EXPORT Bool
xf86CrtcRotate (xf86CrtcPtr crtc, DisplayModePtr mode, Rotation rotation)
{
ScrnInfoPtr pScrn = crtc->scrn;
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
ScreenPtr pScreen = pScrn->pScreen;
PictTransform crtc_to_fb, fb_to_crtc;
PictureTransformIdentity (&crtc_to_fb);
PictureTransformIdentity (&fb_to_crtc);
PictureTransformIsInverse ("identity", &crtc_to_fb, &fb_to_crtc);
if (rotation != RR_Rotate_0)
{
xFixed rot_cos, rot_sin, rot_dx, rot_dy;
xFixed scale_x, scale_y, scale_dx, scale_dy;
int mode_w = crtc->mode.HDisplay;
int mode_h = crtc->mode.VDisplay;
/* rotation */
switch (rotation & 0xf) {
default:
case RR_Rotate_0:
rot_cos = F ( 1); rot_sin = F ( 0);
rot_dx = F ( 0); rot_dy = F ( 0);
break;
case RR_Rotate_90:
rot_cos = F ( 0); rot_sin = F ( 1);
rot_dx = F ( mode_h); rot_dy = F (0);
break;
case RR_Rotate_180:
rot_cos = F (-1); rot_sin = F ( 0);
rot_dx = F (mode_w); rot_dy = F ( mode_h);
break;
case RR_Rotate_270:
rot_cos = F ( 0); rot_sin = F (-1);
rot_dx = F ( 0); rot_dy = F ( mode_w);
break;
}
PictureTransformRotate (&crtc_to_fb, &fb_to_crtc, rot_cos, rot_sin);
PictureTransformIsInverse ("rotate", &crtc_to_fb, &fb_to_crtc);
PictureTransformTranslate (&crtc_to_fb, &fb_to_crtc, rot_dx, rot_dy);
PictureTransformIsInverse ("rotate translate", &crtc_to_fb, &fb_to_crtc);
/* reflection */
scale_x = F (1);
scale_dx = 0;
scale_y = F (1);
scale_dy = 0;
if (rotation & RR_Reflect_X)
{
scale_x = F(-1);
if (rotation & (RR_Rotate_0|RR_Rotate_180))
scale_dx = F(mode_w);
else
scale_dx = F(mode_h);
}
if (rotation & RR_Reflect_Y)
{
scale_y = F(-1);
if (rotation & (RR_Rotate_0|RR_Rotate_180))
scale_dy = F(mode_h);
else
scale_dy = F(mode_w);
}
PictureTransformScale (&crtc_to_fb, &fb_to_crtc, scale_x, scale_y);
PictureTransformIsInverse ("scale", &crtc_to_fb, &fb_to_crtc);
PictureTransformTranslate (&crtc_to_fb, &fb_to_crtc, scale_dx, scale_dy);
PictureTransformIsInverse ("scale translate", &crtc_to_fb, &fb_to_crtc);
}
/*
* If the untranslated transformation is the identity,
* disable the shadow buffer
*/
if (PictureTransformIsIdentity (&crtc_to_fb))
{
crtc->transform_in_use = FALSE;
PictureTransformInitTranslate (&crtc->crtc_to_framebuffer,
F (-crtc->x), F (-crtc->y));
PictureTransformInitTranslate (&crtc->framebuffer_to_crtc,
F ( crtc->x), F ( crtc->y));
xf86RotateDestroy (crtc);
}
else
{
PictureTransformTranslate (&crtc_to_fb, &fb_to_crtc, crtc->x, crtc->y);
PictureTransformIsInverse ("offset", &crtc_to_fb, &fb_to_crtc);
/*
* these are the size of the shadow pixmap, which
* matches the mode, not the pre-rotated copy in the
* frame buffer
*/
int width = mode->HDisplay;
int height = mode->VDisplay;
void *shadowData = crtc->rotatedData;
PixmapPtr shadow = crtc->rotatedPixmap;
int old_width = shadow ? shadow->drawable.width : 0;
int old_height = shadow ? shadow->drawable.height : 0;
/* Allocate memory for rotation */
if (old_width != width || old_height != height)
{
if (shadow || shadowData)
{
crtc->funcs->shadow_destroy (crtc, shadow, shadowData);
crtc->rotatedPixmap = NULL;
crtc->rotatedData = NULL;
}
shadowData = crtc->funcs->shadow_allocate (crtc, width, height);
if (!shadowData)
goto bail1;
crtc->rotatedData = shadowData;
/* shadow will be damaged in xf86RotatePrepare */
}
else
{
/* mark shadowed area as damaged so it will be repainted */
xf86CrtcDamageShadow (crtc);
}
if (!xf86_config->rotation_damage)
{
/* Create damage structure */
xf86_config->rotation_damage = DamageCreate (NULL, NULL,
DamageReportNone,
TRUE, pScreen, pScreen);
if (!xf86_config->rotation_damage)
goto bail2;
/* Wrap block handler */
xf86_config->BlockHandler = pScreen->BlockHandler;
pScreen->BlockHandler = xf86RotateBlockHandler;
}
if (0)
{
bail2:
if (shadow || shadowData)
{
crtc->funcs->shadow_destroy (crtc, shadow, shadowData);
crtc->rotatedPixmap = NULL;
crtc->rotatedData = NULL;
}
bail1:
if (old_width && old_height)
crtc->rotatedPixmap = crtc->funcs->shadow_create (crtc,
NULL,
old_width,
old_height);
return FALSE;
}
crtc->transform_in_use = TRUE;
crtc->crtc_to_framebuffer = crtc_to_fb;
crtc->framebuffer_to_crtc = fb_to_crtc;
crtc->bounds.x1 = 0;
crtc->bounds.x2 = crtc->mode.HDisplay;
crtc->bounds.y1 = 0;
crtc->bounds.y2 = crtc->mode.VDisplay;
PictureTransformBounds (&crtc->bounds, &crtc_to_fb);
}
/* All done */
return TRUE;
}
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