113 lines
3.0 KiB
C
113 lines
3.0 KiB
C
/*
|
|
Copyright (C) 2014 by Leonhard Oelke <leonhard@in-verted.de>
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <X11/extensions/Xfixes.h>
|
|
|
|
#include <util/bmem.h>
|
|
#include "xcursor.h"
|
|
|
|
/*
|
|
* Get pixel data for the cursor
|
|
*
|
|
* XFixes has the data defined as unsigned long, so we can not use memcpy.
|
|
* Theres a lot of talk about this in other implementation and they tend to
|
|
* be really complicated, but this naive approach seems to work fine ...
|
|
*/
|
|
static uint32_t *xcursor_pixels(XFixesCursorImage *xc) {
|
|
uint_fast32_t size = xc->width * xc->height;
|
|
uint32_t *pixels = bmalloc(size * sizeof(uint32_t));
|
|
|
|
for (uint_fast32_t i = 0; i < size; ++i)
|
|
pixels[i] = (uint32_t) xc->pixels[i];
|
|
|
|
return pixels;
|
|
}
|
|
|
|
/*
|
|
* Create the cursor texture, either by updating if the new cursor has the same
|
|
* size or by creating a new texture if the size is different
|
|
*/
|
|
static void xcursor_create(xcursor_t *data, XFixesCursorImage *xc) {
|
|
uint32_t *pixels = xcursor_pixels(xc);
|
|
|
|
if (data->tex
|
|
&& data->last_height == xc->width
|
|
&& data->last_width == xc->height) {
|
|
texture_setimage(data->tex, (void **) pixels,
|
|
xc->width * sizeof(uint32_t), False);
|
|
} else {
|
|
if (data->tex)
|
|
texture_destroy(data->tex);
|
|
|
|
data->tex = gs_create_texture(xc->width, xc->height,
|
|
GS_RGBA, 1, (const void **) &pixels, GS_DYNAMIC);
|
|
}
|
|
|
|
bfree(pixels);
|
|
|
|
data->last_serial = xc->cursor_serial;
|
|
data->last_width = xc->width;
|
|
data->last_height = xc->height;
|
|
}
|
|
|
|
xcursor_t *xcursor_init(Display *dpy) {
|
|
xcursor_t *data = bmalloc(sizeof(xcursor_t));
|
|
memset(data, 0, sizeof(xcursor_t));
|
|
|
|
data->dpy = dpy;
|
|
xcursor_tick(data);
|
|
|
|
return data;
|
|
}
|
|
|
|
void xcursor_destroy(xcursor_t *data) {
|
|
if (data->tex)
|
|
texture_destroy(data->tex);
|
|
bfree(data);
|
|
}
|
|
|
|
void xcursor_tick(xcursor_t *data) {
|
|
XFixesCursorImage *xc = XFixesGetCursorImage(data->dpy);
|
|
|
|
if (!data->tex || data->last_serial != xc->cursor_serial)
|
|
xcursor_create(data, xc);
|
|
data->pos_x = -1.0 * (xc->x - xc->xhot);
|
|
data->pos_y = -1.0 * (xc->y - xc->yhot);
|
|
|
|
XFree(xc);
|
|
}
|
|
|
|
void xcursor_render(xcursor_t *data) {
|
|
/* TODO: why do i need effects ? */
|
|
effect_t effect = gs_geteffect();
|
|
eparam_t image = effect_getparambyname(effect, "image");
|
|
|
|
effect_settexture(effect, image, data->tex);
|
|
|
|
gs_matrix_push();
|
|
|
|
gs_matrix_translate3f(data->pos_x, data->pos_y, 0);
|
|
|
|
gs_enable_blending(True);
|
|
gs_blendfunction(GS_BLEND_ONE, GS_BLEND_INVSRCALPHA);
|
|
gs_draw_sprite(data->tex, 0, 0, 0);
|
|
gs_enable_blending(False);
|
|
|
|
gs_matrix_pop();
|
|
}
|