b9ab48c70c
Due to the recent change with matrices, the way space is represented by matrices is a bit different. The matrix stack represents the view matrix, rather than the model matrix, so the position is more representative of the camera (view) itself, rather than that of the objects (model).
119 lines
3.1 KiB
C
119 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 <X11/extensions/Xfixes.h>
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#include <util/bmem.h>
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#include "xcursor.h"
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/*
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* Get pixel data for the cursor
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*
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* XFixes has the data defined as unsigned long, so we can not use memcpy.
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* Theres a lot of talk about this in other implementation and they tend to
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* be really complicated, but this naive approach seems to work fine ...
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*/
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static uint32_t *xcursor_pixels(XFixesCursorImage *xc) {
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uint_fast32_t size = xc->width * xc->height;
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uint32_t *pixels = bmalloc(size * sizeof(uint32_t));
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for (uint_fast32_t i = 0; i < size; ++i)
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pixels[i] = (uint32_t) xc->pixels[i];
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return pixels;
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}
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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 xcursor_create(xcursor_t *data, XFixesCursorImage *xc) {
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uint32_t *pixels = xcursor_pixels(xc);
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if (data->tex
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&& data->last_height == xc->width
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&& data->last_width == xc->height) {
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texture_setimage(data->tex, (void **) 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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texture_destroy(data->tex);
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data->tex = gs_create_texture(xc->width, xc->height,
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GS_BGRA, 1, (const void **) &pixels, GS_DYNAMIC);
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}
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bfree(pixels);
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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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xcursor_t *xcursor_init(Display *dpy) {
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xcursor_t *data = bzalloc(sizeof(xcursor_t));
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data->dpy = dpy;
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xcursor_tick(data);
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return data;
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}
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void xcursor_destroy(xcursor_t *data) {
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if (data->tex)
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texture_destroy(data->tex);
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bfree(data);
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}
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void xcursor_tick(xcursor_t *data) {
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XFixesCursorImage *xc = XFixesGetCursorImage(data->dpy);
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if (!data->tex || data->last_serial != xc->cursor_serial)
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xcursor_create(data, xc);
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data->pos_x = -1.0 * (xc->x - xc->xhot - data->x_org);
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data->pos_y = -1.0 * (xc->y - xc->yhot - data->y_org);
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XFree(xc);
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}
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void xcursor_render(xcursor_t *data) {
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/* TODO: why do i need effects ? */
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effect_t effect = gs_geteffect();
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eparam_t image = effect_getparambyname(effect, "image");
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effect_settexture(effect, image, data->tex);
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gs_matrix_push();
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gs_matrix_translate3f(-data->pos_x, -data->pos_y, 0);
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gs_enable_blending(True);
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gs_blendfunction(GS_BLEND_ONE, GS_BLEND_INVSRCALPHA);
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gs_draw_sprite(data->tex, 0, 0, 0);
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gs_enable_blending(False);
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gs_matrix_pop();
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}
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void xcursor_offset(xcursor_t* data, int_fast32_t x_org, int_fast32_t 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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