117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/*
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Copyright (C) 2014 by Leonhard Oelke <leonhard@in-verted.de>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <xcb/xfixes.h>
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#include <util/bmem.h>
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#include "xcursor-xcb.h"
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/*
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* Create the cursor texture, either by updating if the new cursor has the same
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* size or by creating a new texture if the size is different
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*/
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static void xcb_xcursor_create(xcb_xcursor_t *data,
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xcb_xfixes_get_cursor_image_reply_t *xc)
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{
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uint32_t *pixels = xcb_xfixes_get_cursor_image_cursor_image(xc);
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if (!pixels)
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return;
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if (data->tex && data->last_height == xc->width &&
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data->last_width == xc->height) {
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gs_texture_set_image(data->tex, (const uint8_t *) pixels,
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xc->width * sizeof(uint32_t), false);
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} else {
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if (data->tex)
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gs_texture_destroy(data->tex);
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data->tex = gs_texture_create(xc->width, xc->height,
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GS_BGRA, 1, (const uint8_t **) &pixels, GS_DYNAMIC);
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}
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data->last_serial = xc->cursor_serial;
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data->last_width = xc->width;
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data->last_height = xc->height;
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}
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/**
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* We need to check for the xfixes version in order to initialize it ?
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*/
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xcb_xcursor_t *xcb_xcursor_init(xcb_connection_t *xcb)
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{
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xcb_xcursor_t *data = bzalloc(sizeof(xcb_xcursor_t));
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xcb_xfixes_query_version_cookie_t xfix_c;
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xfix_c = xcb_xfixes_query_version_unchecked(xcb,
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XCB_XFIXES_MAJOR_VERSION, XCB_XFIXES_MINOR_VERSION);
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free(xcb_xfixes_query_version_reply(xcb, xfix_c, NULL));
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return data;
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}
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void xcb_xcursor_destroy(xcb_xcursor_t *data)
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{
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if (data->tex)
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gs_texture_destroy(data->tex);
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bfree(data);
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}
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void xcb_xcursor_update(xcb_xcursor_t *data,
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xcb_xfixes_get_cursor_image_reply_t *xc)
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{
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if (!data || !xc)
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return;
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if (!data->tex || data->last_serial != xc->cursor_serial)
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xcb_xcursor_create(data, xc);
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data->x = xc->x - data->x_org;
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data->y = xc->y - data->y_org;
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data->x_render = data->x - xc->xhot;
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data->y_render = data->y - xc->yhot;
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}
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void xcb_xcursor_render(xcb_xcursor_t *data)
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{
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if (!data->tex)
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return;
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gs_effect_t *effect = gs_get_effect();
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gs_eparam_t *image = gs_effect_get_param_by_name(effect, "image");
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gs_effect_set_texture(image, data->tex);
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gs_blend_state_push();
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gs_blend_function(GS_BLEND_SRCALPHA, GS_BLEND_INVSRCALPHA);
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gs_enable_color(true, true, true, false);
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gs_matrix_push();
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gs_matrix_translate3f(data->x_render, data->y_render, 0.0f);
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gs_draw_sprite(data->tex, 0, 0, 0);
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gs_matrix_pop();
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gs_enable_color(true, true, true, true);
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gs_blend_state_pop();
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}
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void xcb_xcursor_offset(xcb_xcursor_t* data, const int x_org, const int y_org)
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{
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data->x_org = x_org;
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data->y_org = y_org;
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}
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