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xserver/hw/xfree86/modes/xf86Cursors.c

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/*
* Copyright © 2007 Keith Packard
* Copyright © 2010-2011 Aaron Plattner
*
* 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>
#endif
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <X11/Xarch.h>
#include "xf86.h"
#include "xf86DDC.h"
#include "xf86Crtc.h"
#include "xf86Modes.h"
#include "xf86RandR12.h"
#include "xf86CursorPriv.h"
#include "X11/extensions/render.h"
#include "X11/extensions/dpmsconst.h"
#include "X11/Xatom.h"
#include "picturestr.h"
#include "cursorstr.h"
#include "inputstr.h"
/*
* Returns the rotation being performed by the server. If the driver indicates
* that it's handling the screen transform, then this returns RR_Rotate_0.
*/
static Rotation
xf86_crtc_cursor_rotation(xf86CrtcPtr crtc)
{
if (crtc->driverIsPerformingTransform & XF86DriverTransformCursorImage)
return RR_Rotate_0;
return crtc->rotation;
}
/*
* Given a screen coordinate, rotate back to a cursor source coordinate
*/
static void
xf86_crtc_rotate_coord(Rotation rotation,
int width,
int height, int x_dst, int y_dst, int *x_src, int *y_src)
{
int t;
switch (rotation & 0xf) {
case RR_Rotate_0:
break;
case RR_Rotate_90:
t = x_dst;
x_dst = width - y_dst - 1;
y_dst = t;
break;
case RR_Rotate_180:
x_dst = width - x_dst - 1;
y_dst = height - y_dst - 1;
break;
case RR_Rotate_270:
t = x_dst;
x_dst = y_dst;
y_dst = height - t - 1;
break;
}
if (rotation & RR_Reflect_X)
x_dst = width - x_dst - 1;
if (rotation & RR_Reflect_Y)
y_dst = height - y_dst - 1;
*x_src = x_dst;
*y_src = y_dst;
}
/*
* Given a cursor source coordinate, rotate to a screen coordinate
*/
static void
xf86_crtc_rotate_coord_back(Rotation rotation,
int width,
int height,
int x_dst, int y_dst, int *x_src, int *y_src)
{
int t;
if (rotation & RR_Reflect_X)
x_dst = width - x_dst - 1;
if (rotation & RR_Reflect_Y)
y_dst = height - y_dst - 1;
switch (rotation & 0xf) {
case RR_Rotate_0:
break;
case RR_Rotate_90:
t = x_dst;
x_dst = y_dst;
y_dst = width - t - 1;
break;
case RR_Rotate_180:
x_dst = width - x_dst - 1;
y_dst = height - y_dst - 1;
break;
case RR_Rotate_270:
t = x_dst;
x_dst = height - y_dst - 1;
y_dst = t;
break;
}
*x_src = x_dst;
*y_src = y_dst;
}
struct cursor_bit {
CARD8 *byte;
char bitpos;
};
/*
* Convert an x coordinate to a position within the cursor bitmap
*/
static struct cursor_bit
cursor_bitpos(CARD8 *image, xf86CursorInfoPtr cursor_info, int x, int y,
Bool mask)
{
const int flags = cursor_info->Flags;
const Bool interleaved =
! !(flags & (HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_1 |
HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_8 |
HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_16 |
HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_32 |
HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_64));
const int width = cursor_info->MaxWidth;
const int height = cursor_info->MaxHeight;
const int stride = interleaved ? width / 4 : width / 8;
struct cursor_bit ret;
image += y * stride;
if (flags & HARDWARE_CURSOR_SWAP_SOURCE_AND_MASK)
mask = !mask;
if (flags & HARDWARE_CURSOR_NIBBLE_SWAPPED)
x = (x & ~3) | (3 - (x & 3));
if (((flags & HARDWARE_CURSOR_BIT_ORDER_MSBFIRST) == 0) ==
(X_BYTE_ORDER == X_BIG_ENDIAN))
x = (x & ~7) | (7 - (x & 7));
if (flags & HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_1)
x = (x << 1) + mask;
else if (flags & HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_8)
x = ((x & ~7) << 1) | (mask << 3) | (x & 7);
else if (flags & HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_16)
x = ((x & ~15) << 1) | (mask << 4) | (x & 15);
else if (flags & HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_32)
x = ((x & ~31) << 1) | (mask << 5) | (x & 31);
else if (flags & HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_64)
x = ((x & ~63) << 1) | (mask << 6) | (x & 63);
else if (mask)
image += stride * height;
ret.byte = image + (x / 8);
ret.bitpos = x & 7;
return ret;
}
/*
* Fetch one bit from a cursor bitmap
*/
static CARD8
get_bit(CARD8 *image, xf86CursorInfoPtr cursor_info, int x, int y, Bool mask)
{
struct cursor_bit bit = cursor_bitpos(image, cursor_info, x, y, mask);
return (*bit.byte >> bit.bitpos) & 1;
}
/*
* Set one bit in a cursor bitmap
*/
static void
set_bit(CARD8 *image, xf86CursorInfoPtr cursor_info, int x, int y, Bool mask)
{
struct cursor_bit bit = cursor_bitpos(image, cursor_info, x, y, mask);
*bit.byte |= 1 << bit.bitpos;
}
/*
* Wrappers to deal with API compatibility with drivers that don't expose
* *_cursor_*_check
*/
static inline Bool
xf86_driver_has_load_cursor_image(xf86CrtcPtr crtc)
{
return crtc->funcs->load_cursor_image_check || crtc->funcs->load_cursor_image;
}
static inline Bool
xf86_driver_has_load_cursor_argb(xf86CrtcPtr crtc)
{
return crtc->funcs->load_cursor_argb_check || crtc->funcs->load_cursor_argb;
}
static inline Bool
xf86_driver_show_cursor(xf86CrtcPtr crtc)
{
if (crtc->funcs->show_cursor_check)
return crtc->funcs->show_cursor_check(crtc);
crtc->funcs->show_cursor(crtc);
return TRUE;
}
static inline Bool
xf86_driver_load_cursor_image(xf86CrtcPtr crtc, CARD8 *cursor_image)
{
if (crtc->funcs->load_cursor_image_check)
return crtc->funcs->load_cursor_image_check(crtc, cursor_image);
crtc->funcs->load_cursor_image(crtc, cursor_image);
return TRUE;
}
static inline Bool
xf86_driver_load_cursor_argb(xf86CrtcPtr crtc, CARD32 *cursor_argb)
{
if (crtc->funcs->load_cursor_argb_check)
return crtc->funcs->load_cursor_argb_check(crtc, cursor_argb);
crtc->funcs->load_cursor_argb(crtc, cursor_argb);
return TRUE;
}
/*
* Load a two color cursor into a driver that supports only ARGB cursors
*/
static Bool
xf86_crtc_convert_cursor_to_argb(xf86CrtcPtr crtc, unsigned char *src)
{
ScrnInfoPtr scrn = crtc->scrn;
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
xf86CursorInfoPtr cursor_info = xf86_config->cursor_info;
CARD32 *cursor_image = (CARD32 *) xf86_config->cursor_image;
int x, y;
int xin, yin;
int flags = cursor_info->Flags;
CARD32 bits;
const Rotation rotation = xf86_crtc_cursor_rotation(crtc);
crtc->cursor_argb = FALSE;
for (y = 0; y < cursor_info->MaxHeight; y++)
for (x = 0; x < cursor_info->MaxWidth; x++) {
xf86_crtc_rotate_coord(rotation,
cursor_info->MaxWidth,
cursor_info->MaxHeight, x, y, &xin, &yin);
if (get_bit(src, cursor_info, xin, yin, TRUE) ==
((flags & HARDWARE_CURSOR_INVERT_MASK) == 0)) {
if (get_bit(src, cursor_info, xin, yin, FALSE))
bits = xf86_config->cursor_fg;
else
bits = xf86_config->cursor_bg;
}
else
bits = 0;
cursor_image[y * cursor_info->MaxWidth + x] = bits;
}
return xf86_driver_load_cursor_argb(crtc, cursor_image);
}
/*
* Set the colors for a two-color cursor (ignore for ARGB cursors)
*/
static void
xf86_set_cursor_colors(ScrnInfoPtr scrn, int bg, int fg)
{
ScreenPtr screen = scrn->pScreen;
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
CursorPtr cursor = xf86CurrentCursor(screen);
int c;
CARD8 *bits = cursor ?
dixLookupScreenPrivate(&cursor->devPrivates,
&xf86ScreenCursorBitsKeyRec, screen)
: NULL;
/* Save ARGB versions of these colors */
xf86_config->cursor_fg = (CARD32) fg | 0xff000000;
xf86_config->cursor_bg = (CARD32) bg | 0xff000000;
for (c = 0; c < xf86_config->num_crtc; c++) {
xf86CrtcPtr crtc = xf86_config->crtc[c];
if (crtc->enabled && !crtc->cursor_argb) {
if (xf86_driver_has_load_cursor_image(crtc))
crtc->funcs->set_cursor_colors(crtc, bg, fg);
else if (bits)
xf86_crtc_convert_cursor_to_argb(crtc, bits);
}
}
}
void
xf86_crtc_hide_cursor(xf86CrtcPtr crtc)
{
if (crtc->cursor_shown) {
crtc->funcs->hide_cursor(crtc);
crtc->cursor_shown = FALSE;
}
}
void
xf86_hide_cursors(ScrnInfoPtr scrn)
{
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
int c;
xf86_config->cursor_on = FALSE;
for (c = 0; c < xf86_config->num_crtc; c++) {
xf86CrtcPtr crtc = xf86_config->crtc[c];
if (crtc->enabled)
xf86_crtc_hide_cursor(crtc);
}
}
Bool
xf86_crtc_show_cursor(xf86CrtcPtr crtc)
{
if (!crtc->cursor_in_range) {
crtc->funcs->hide_cursor(crtc);
return TRUE;
}
if (!crtc->cursor_shown)
crtc->cursor_shown = xf86_driver_show_cursor(crtc);
return crtc->cursor_shown;
}
Bool
xf86_show_cursors(ScrnInfoPtr scrn)
{
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
int c;
xf86_config->cursor_on = TRUE;
for (c = 0; c < xf86_config->num_crtc; c++) {
xf86CrtcPtr crtc = xf86_config->crtc[c];
if (crtc->enabled && !xf86_crtc_show_cursor(crtc))
return FALSE;
}
return TRUE;
}
static void
xf86_crtc_transform_cursor_position(xf86CrtcPtr crtc, int *x, int *y)
{
ScrnInfoPtr scrn = crtc->scrn;
ScreenPtr screen = scrn->pScreen;
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
xf86CursorInfoPtr cursor_info = xf86_config->cursor_info;
xf86CursorScreenPtr ScreenPriv =
(xf86CursorScreenPtr) dixLookupPrivate(&screen->devPrivates,
xf86CursorScreenKey);
int dx, dy, t;
Bool swap_reflection = FALSE;
*x = *x - crtc->x + ScreenPriv->HotX;
*y = *y - crtc->y + ScreenPriv->HotY;
switch (crtc->rotation & 0xf) {
case RR_Rotate_0:
break;
case RR_Rotate_90:
t = *x;
*x = *y;
*y = crtc->mode.VDisplay - t - 1;
swap_reflection = TRUE;
break;
case RR_Rotate_180:
*x = crtc->mode.HDisplay - *x - 1;
*y = crtc->mode.VDisplay - *y - 1;
break;
case RR_Rotate_270:
t = *x;
*x = crtc->mode.HDisplay - *y - 1;
*y = t;
swap_reflection = TRUE;
break;
}
if (swap_reflection) {
if (crtc->rotation & RR_Reflect_Y)
*x = crtc->mode.HDisplay - *x - 1;
if (crtc->rotation & RR_Reflect_X)
*y = crtc->mode.VDisplay - *y - 1;
} else {
if (crtc->rotation & RR_Reflect_X)
*x = crtc->mode.HDisplay - *x - 1;
if (crtc->rotation & RR_Reflect_Y)
*y = crtc->mode.VDisplay - *y - 1;
}
/*
* Transform position of cursor upper left corner
*/
xf86_crtc_rotate_coord_back(crtc->rotation, cursor_info->MaxWidth,
cursor_info->MaxHeight, ScreenPriv->HotX,
ScreenPriv->HotY, &dx, &dy);
*x -= dx;
*y -= dy;
}
static void
xf86_crtc_set_cursor_position(xf86CrtcPtr crtc, int x, int y)
{
ScrnInfoPtr scrn = crtc->scrn;
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
xf86CursorInfoPtr cursor_info = xf86_config->cursor_info;
DisplayModePtr mode = &crtc->mode;
int crtc_x = x, crtc_y = y;
/*
* Transform position of cursor on screen
*/
if (crtc->rotation != RR_Rotate_0)
xf86_crtc_transform_cursor_position(crtc, &crtc_x, &crtc_y);
else {
crtc_x -= crtc->x;
crtc_y -= crtc->y;
}
/*
* Disable the cursor when it is outside the viewport
*/
if (crtc_x >= mode->HDisplay || crtc_y >= mode->VDisplay ||
crtc_x <= -cursor_info->MaxWidth || crtc_y <= -cursor_info->MaxHeight) {
crtc->cursor_in_range = FALSE;
xf86_crtc_hide_cursor(crtc);
} else {
crtc->cursor_in_range = TRUE;
if (crtc->driverIsPerformingTransform & XF86DriverTransformCursorPosition)
crtc->funcs->set_cursor_position(crtc, x, y);
else
crtc->funcs->set_cursor_position(crtc, crtc_x, crtc_y);
xf86_crtc_show_cursor(crtc);
}
}
static void
xf86_set_cursor_position(ScrnInfoPtr scrn, int x, int y)
{
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
int c;
/* undo what xf86HWCurs did to the coordinates */
x += scrn->frameX0;
y += scrn->frameY0;
for (c = 0; c < xf86_config->num_crtc; c++) {
xf86CrtcPtr crtc = xf86_config->crtc[c];
if (crtc->enabled)
xf86_crtc_set_cursor_position(crtc, x, y);
}
}
/*
* Load a two-color cursor into a crtc, performing rotation as needed
*/
static Bool
xf86_crtc_load_cursor_image(xf86CrtcPtr crtc, CARD8 *src)
{
ScrnInfoPtr scrn = crtc->scrn;
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
xf86CursorInfoPtr cursor_info = xf86_config->cursor_info;
CARD8 *cursor_image;
const Rotation rotation = xf86_crtc_cursor_rotation(crtc);
crtc->cursor_argb = FALSE;
if (rotation == RR_Rotate_0)
cursor_image = src;
else {
int x, y;
int xin, yin;
int stride = cursor_info->MaxWidth >> 2;
cursor_image = xf86_config->cursor_image;
memset(cursor_image, 0, cursor_info->MaxHeight * stride);
for (y = 0; y < cursor_info->MaxHeight; y++)
for (x = 0; x < cursor_info->MaxWidth; x++) {
xf86_crtc_rotate_coord(rotation,
cursor_info->MaxWidth,
cursor_info->MaxHeight,
x, y, &xin, &yin);
if (get_bit(src, cursor_info, xin, yin, FALSE))
set_bit(cursor_image, cursor_info, x, y, FALSE);
if (get_bit(src, cursor_info, xin, yin, TRUE))
set_bit(cursor_image, cursor_info, x, y, TRUE);
}
}
return xf86_driver_load_cursor_image(crtc, cursor_image);
}
/*
* Load a cursor image into all active CRTCs
*/
static Bool
xf86_load_cursor_image(ScrnInfoPtr scrn, unsigned char *src)
{
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
int c;
xf86_config->cursor = xf86CurrentCursor(scrn->pScreen);
for (c = 0; c < xf86_config->num_crtc; c++) {
xf86CrtcPtr crtc = xf86_config->crtc[c];
if (crtc->enabled) {
if (xf86_driver_has_load_cursor_image(crtc)) {
if (!xf86_crtc_load_cursor_image(crtc, src))
return FALSE;
} else if (xf86_driver_has_load_cursor_argb(crtc)) {
if (!xf86_crtc_convert_cursor_to_argb(crtc, src))
return FALSE;
} else
return FALSE;
}
}
return TRUE;
}
static Bool
xf86_use_hw_cursor(ScreenPtr screen, CursorPtr cursor)
{
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
xf86CursorInfoPtr cursor_info = xf86_config->cursor_info;
int c;
if (cursor->bits->width > cursor_info->MaxWidth ||
cursor->bits->height > cursor_info->MaxHeight)
return FALSE;
for (c = 0; c < xf86_config->num_crtc; c++) {
xf86CrtcPtr crtc = xf86_config->crtc[c];
if (!crtc->enabled)
continue;
if (crtc->transformPresent)
return FALSE;
}
return TRUE;
}
static Bool
xf86_use_hw_cursor_argb(ScreenPtr screen, CursorPtr cursor)
{
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
xf86CursorInfoPtr cursor_info = xf86_config->cursor_info;
if (!xf86_use_hw_cursor(screen, cursor))
return FALSE;
/* Make sure ARGB support is available */
if ((cursor_info->Flags & HARDWARE_CURSOR_ARGB) == 0)
return FALSE;
return TRUE;
}
static Bool
xf86_crtc_load_cursor_argb(xf86CrtcPtr crtc, CursorPtr cursor)
{
ScrnInfoPtr scrn = crtc->scrn;
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
xf86CursorInfoPtr cursor_info = xf86_config->cursor_info;
CARD32 *cursor_image = (CARD32 *) xf86_config->cursor_image;
CARD32 *cursor_source = (CARD32 *) cursor->bits->argb;
int x, y;
int xin, yin;
CARD32 bits;
int source_width = cursor->bits->width;
int source_height = cursor->bits->height;
int image_width = cursor_info->MaxWidth;
int image_height = cursor_info->MaxHeight;
const Rotation rotation = xf86_crtc_cursor_rotation(crtc);
for (y = 0; y < image_height; y++)
for (x = 0; x < image_width; x++) {
xf86_crtc_rotate_coord(rotation, image_width, image_height, x, y,
&xin, &yin);
if (xin < source_width && yin < source_height)
bits = cursor_source[yin * source_width + xin];
else
bits = 0;
cursor_image[y * image_width + x] = bits;
}
return xf86_driver_load_cursor_argb(crtc, cursor_image);
}
static Bool
xf86_load_cursor_argb(ScrnInfoPtr scrn, CursorPtr cursor)
{
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
int c;
xf86_config->cursor = cursor;
for (c = 0; c < xf86_config->num_crtc; c++) {
xf86CrtcPtr crtc = xf86_config->crtc[c];
if (crtc->enabled)
if (!xf86_crtc_load_cursor_argb(crtc, cursor))
return FALSE;
}
return TRUE;
}
Bool
xf86_cursors_init(ScreenPtr screen, int max_width, int max_height, int flags)
{
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
xf86CursorInfoPtr cursor_info;
cursor_info = xf86CreateCursorInfoRec();
if (!cursor_info)
return FALSE;
xf86_config->cursor_image = malloc(max_width * max_height * 4);
if (!xf86_config->cursor_image) {
xf86DestroyCursorInfoRec(cursor_info);
return FALSE;
}
xf86_config->cursor_info = cursor_info;
cursor_info->MaxWidth = max_width;
cursor_info->MaxHeight = max_height;
cursor_info->Flags = flags;
cursor_info->SetCursorColors = xf86_set_cursor_colors;
cursor_info->SetCursorPosition = xf86_set_cursor_position;
cursor_info->LoadCursorImageCheck = xf86_load_cursor_image;
cursor_info->HideCursor = xf86_hide_cursors;
cursor_info->ShowCursorCheck = xf86_show_cursors;
cursor_info->UseHWCursor = xf86_use_hw_cursor;
if (flags & HARDWARE_CURSOR_ARGB) {
cursor_info->UseHWCursorARGB = xf86_use_hw_cursor_argb;
cursor_info->LoadCursorARGBCheck = xf86_load_cursor_argb;
}
xf86_hide_cursors(scrn);
return xf86InitCursor(screen, cursor_info);
}
/**
* Clean up CRTC-based cursor code
*/
void
xf86_cursors_fini(ScreenPtr screen)
{
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
if (xf86_config->cursor_info) {
xf86DestroyCursorInfoRec(xf86_config->cursor_info);
xf86_config->cursor_info = NULL;
}
free(xf86_config->cursor_image);
xf86_config->cursor_image = NULL;
xf86_config->cursor = NULL;
}
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