mirror of
https://github.com/Relintai/pandemonium_engine_minimal.git
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117 lines
3.8 KiB
C++
117 lines
3.8 KiB
C++
// egl_base_context.h
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/*
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* FRT - A Godot platform targeting single board computers
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* Copyright (c) 2017-2019 Emanuele Fornara
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "dl/egl.gen.h"
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namespace frt {
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class EGLBaseContext {
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private:
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void build_attr_list(EGLint *attr_list) {
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App *app = App::instance();
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int n = 0;
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const int color_size = app->get_int_param("color_size");
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attr_list[n++] = EGL_RED_SIZE;
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attr_list[n++] = color_size;
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attr_list[n++] = EGL_GREEN_SIZE;
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attr_list[n++] = color_size;
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attr_list[n++] = EGL_BLUE_SIZE;
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attr_list[n++] = color_size;
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const int alpha_size = app->get_int_param("alpha_size");
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attr_list[n++] = EGL_ALPHA_SIZE;
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attr_list[n++] = alpha_size >= 0 ? alpha_size : EGL_DONT_CARE;
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const int depth_size = app->get_int_param("depth_size");
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attr_list[n++] = EGL_DEPTH_SIZE;
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attr_list[n++] = depth_size >= 0 ? depth_size : EGL_DONT_CARE;
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if (app->get_bool_param("multisample")) {
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attr_list[n++] = EGL_SAMPLE_BUFFERS;
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attr_list[n++] = 1;
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}
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attr_list[n++] = EGL_SURFACE_TYPE;
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attr_list[n++] = EGL_WINDOW_BIT;
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attr_list[n++] = EGL_NONE;
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}
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protected:
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EGLDisplay display;
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EGLContext context;
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EGLSurface surface;
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EGLConfig config;
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public:
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void init(int version, EGLNativeDisplayType display_id = EGL_DEFAULT_DISPLAY) {
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static EGLint attr_list[32];
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static const EGLint ctx_attrs[] = {
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EGL_CONTEXT_CLIENT_VERSION, version,
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EGL_NONE
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};
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EGLBoolean result;
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EGLint num_config;
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display = eglGetDisplay(display_id);
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if (display == EGL_NO_DISPLAY)
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fatal("eglGetDisplay failed.");
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result = eglInitialize(display, 0, 0);
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if (result == EGL_FALSE)
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fatal("eglInitialize failed.");
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build_attr_list(attr_list);
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result = eglChooseConfig(display, attr_list, &config, 1, &num_config);
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if (result == EGL_FALSE)
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fatal("eglChooseConfig failed.");
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result = eglBindAPI(EGL_OPENGL_ES_API);
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if (result == EGL_FALSE)
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fatal("eglBindAPI failed.");
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context = eglCreateContext(display, config, EGL_NO_CONTEXT, ctx_attrs);
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if (context == EGL_NO_CONTEXT)
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fatal("eglCreateContext failed.");
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};
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void create_simple_surface(EGLNativeWindowType window_id) {
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surface = eglCreateWindowSurface(display, config, window_id, 0);
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if (surface == EGL_NO_SURFACE)
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fatal("eglCreateWindowSurface failed.");
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}
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void cleanup() {
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eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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eglDestroyContext(display, context);
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eglTerminate(display);
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}
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void destroy_surface() {
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eglDestroySurface(display, surface);
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}
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void make_current() {
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eglMakeCurrent(display, surface, surface, context);
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}
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void release_current() {
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eglMakeCurrent(display, 0, 0, 0);
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}
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void swap_buffers() {
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eglSwapBuffers(display, surface);
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}
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void swap_interval(int interval) {
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eglSwapInterval(display, interval);
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}
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};
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} // namespace frt
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