The open source OpenXR runtime
t/gui: Add scene manager
authored by
Jakob Bornecrantz
and committed by
Jakob Bornecrantz
71b3de9c
c4741127
+149
+1
src/xrt/targets/gui/CMakeLists.txt
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src/xrt/targets/gui/CMakeLists.txt
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src/xrt/targets/gui/gui_common.h
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src/xrt/targets/gui/gui_common.h
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struct xrt_device;
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struct xrt_prober;
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struct time_state;
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struct gui_scene_manager;
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/*!
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* Common struct holding state for the GUI interface.
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bool stopped;
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bool initialized;
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struct gui_scene_manager *gsm;
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struct
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{
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struct xrt_prober *xp;
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struct gui_ogl_texture *texs[256];
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};
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/*!
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* A single currently running scene.
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*/
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struct gui_scene
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{
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void (*render)(struct gui_scene *, struct program *);
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void (*destroy)(struct gui_scene *);
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};
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/*!
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*/
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void
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gui_ogl_sink_update(struct gui_ogl_texture *);
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/*!
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* Push the scene to the top of the lists.
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*
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* @ingroup gui
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*/
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void
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gui_scene_push_front(struct program *p, struct gui_scene *me);
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/*!
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* Put a scene on the delete list, also removes it from any other list.
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*
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* @ingroup gui
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*/
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void
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gui_scene_delete_me(struct program *p, struct gui_scene *me);
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/*!
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* Render the scenes.
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*
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* @ingroup gui
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*/
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void
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gui_scene_manager_render(struct program *p);
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/*!
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* Initialize the scene manager.
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*
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* @ingroup gui
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*/
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void
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gui_scene_manager_init(struct program *p);
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/*!
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* Destroy the scene manager.
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*
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* @ingroup gui
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*/
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void
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gui_scene_manager_destroy(struct program *p);
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#ifdef __cplusplus
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src/xrt/targets/gui/gui_scene.cpp
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src/xrt/targets/gui/gui_scene.cpp
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// Copyright 2019, Collabora, Ltd.
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// SPDX-License-Identifier: BSL-1.0
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/*!
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* @file
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* @brief SDL2 functions to drive the GUI.
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* @author Jakob Bornecrantz <jakob@collabora.com>
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* @ingroup gui
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*/
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#include "gui_common.h"
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#include <vector>
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struct gui_scene_manager
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{
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public:
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std::vector<gui_scene *> scenes = {};
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std::vector<gui_scene *> del = {};
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};
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extern "C" void
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gui_scene_push_front(struct program *p, struct gui_scene *me)
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{
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auto &gsm = *p->gsm;
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// Need to remove the scene if it is already on the list.
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auto index = gsm.scenes.begin();
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for (auto scene : gsm.scenes) {
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if (scene != me) {
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index++;
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continue;
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}
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gsm.scenes.erase(index);
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break;
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}
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// Now push it to the front.
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gsm.scenes.push_back(me);
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}
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extern "C" void
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gui_scene_delete_me(struct program *p, struct gui_scene *me)
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{
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auto &gsm = *p->gsm;
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auto index = gsm.scenes.begin();
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for (auto scene : gsm.scenes) {
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if (scene != me) {
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index++;
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continue;
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}
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gsm.scenes.erase(index);
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break;
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}
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gsm.del.push_back(me);
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}
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extern "C" void
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gui_scene_manager_render(struct program *p)
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{
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auto &gsm = *p->gsm;
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auto copy = gsm.scenes;
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for (auto scene : copy) {
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scene->render(scene, p);
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}
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copy = gsm.del;
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gsm.del.clear();
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for (auto scene : copy) {
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scene->destroy(scene);
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}
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// If there are no scenes left stop the program.
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if (gsm.scenes.size() == 0) {
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p->stopped = true;
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}
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}
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extern "C" void
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gui_scene_manager_init(struct program *p)
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{
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p->gsm = new gui_scene_manager;
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}
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extern "C" void
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gui_scene_manager_destroy(struct program *p)
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{
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delete p->gsm;
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p->gsm = NULL;
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}