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Imported Upstream version 0.13.2+dsfg1

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Sebastian Ramacher 2016-02-24 00:16:51 +01:00
commit fb3990e9e5
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plugins/linux-capture/xcursor.c Normal file
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/*
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 (!pixels)
return;
if (data->tex
&& data->last_height == xc->width
&& data->last_width == xc->height) {
gs_texture_set_image(data->tex, (const uint8_t *) pixels,
xc->width * sizeof(uint32_t), False);
} else {
if (data->tex)
gs_texture_destroy(data->tex);
data->tex = gs_texture_create(xc->width, xc->height,
GS_BGRA, 1, (const uint8_t **) &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 = bzalloc(sizeof(xcursor_t));
data->dpy = dpy;
xcursor_tick(data);
return data;
}
void xcursor_destroy(xcursor_t *data) {
if (data->tex)
gs_texture_destroy(data->tex);
bfree(data);
}
void xcursor_tick(xcursor_t *data) {
XFixesCursorImage *xc = XFixesGetCursorImage(data->dpy);
if (!xc)
return;
if (!data->tex || data->last_serial != xc->cursor_serial)
xcursor_create(data, xc);
data->x = (int_fast32_t)xc->x - (int_fast32_t)data->x_org;
data->y = (int_fast32_t)xc->y - (int_fast32_t)data->y_org;
data->render_x = xc->x - xc->xhot - data->x_org;
data->render_y = xc->y - xc->yhot - data->y_org;
XFree(xc);
}
void xcursor_render(xcursor_t *data) {
if (!data->tex)
return;
gs_effect_t *effect = gs_get_effect();
gs_eparam_t *image = gs_effect_get_param_by_name(effect, "image");
gs_effect_set_texture(image, data->tex);
gs_blend_state_push();
gs_blend_function(GS_BLEND_SRCALPHA, GS_BLEND_INVSRCALPHA);
gs_enable_color(true, true, true, false);
gs_matrix_push();
gs_matrix_translate3f(data->render_x, data->render_y, 0.0f);
gs_draw_sprite(data->tex, 0, 0, 0);
gs_matrix_pop();
gs_enable_color(true, true, true, true);
gs_blend_state_pop();
}
void xcursor_offset(xcursor_t* data, int_fast32_t x_org, int_fast32_t y_org)
{
data->x_org = x_org;
data->y_org = y_org;
}