2 * freeglut_display_android.c
4 * Window management methods for EGL
6 * Copyright (C) 2012, 2014 Sylvain Beucler
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
22 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 #include <GL/freeglut.h>
27 #include "fg_internal.h"
29 int fghChooseConfig(EGLConfig* config) {
30 EGLint attributes[32];
32 ATTRIB_VAL(EGL_SURFACE_TYPE, EGL_WINDOW_BIT);
33 if (fgState.MajorVersion >= 2) {
35 * Khronos does not specify a EGL_OPENGL_ES3_BIT outside of the OpenGL extension "EGL_KHR_create_context". There are numerous references on the internet that
36 * say to use EGL_OPENGL_ES3_BIT, followed by many saying they can't find it in any headers. In fact, the offical updated specification for EGL does not have
37 * any references to OpenGL ES 3.0. Tests have shown that EGL_OPENGL_ES2_BIT will work with ES 3.0.
39 ATTRIB_VAL(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT);
41 ATTRIB_VAL(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT);
43 /* Technically it's possible to request a standard OpenGL (non-ES)
44 context, but currently our build system assumes EGL => GLES */
45 /* attribs[i++] = EGL_RENDERABLE_TYPE; */
46 /* attribs[i++] = EGL_OPENGL_BIT; */
47 #ifdef TARGET_HOST_BLACKBERRY
48 /* Only 888 and 565 seem to work. Based on
49 http://qt.gitorious.org/qt/qtbase/source/893deb1a93021cdfabe038cdf1869de33a60cbc9:src/plugins/platforms/qnx/qqnxglcontext.cpp and
50 https://twitter.com/BlackBerryDev/status/380720927475912706 */
51 ATTRIB_VAL(EGL_BLUE_SIZE, 8);
52 ATTRIB_VAL(EGL_GREEN_SIZE, 8);
53 ATTRIB_VAL(EGL_RED_SIZE, 8);
55 ATTRIB_VAL(EGL_BLUE_SIZE, 1);
56 ATTRIB_VAL(EGL_GREEN_SIZE, 1);
57 ATTRIB_VAL(EGL_RED_SIZE, 1);
59 ATTRIB_VAL(EGL_ALPHA_SIZE, (fgState.DisplayMode & GLUT_ALPHA) ? 1 : 0);
60 ATTRIB_VAL(EGL_DEPTH_SIZE, (fgState.DisplayMode & GLUT_DEPTH) ? 1 : 0);
61 ATTRIB_VAL(EGL_STENCIL_SIZE, (fgState.DisplayMode & GLUT_STENCIL) ? 1 : 0);
62 ATTRIB_VAL(EGL_SAMPLE_BUFFERS, (fgState.DisplayMode & GLUT_MULTISAMPLE) ? 1 : 0);
63 ATTRIB_VAL(EGL_SAMPLES, (fgState.DisplayMode & GLUT_MULTISAMPLE) ? fgState.SampleNumber : 0);
67 if (!eglChooseConfig(fgDisplay.pDisplay.egl.Display,
68 attributes, config, 1, &num_config)) {
69 fgWarning("eglChooseConfig: error %x\n", eglGetError());
77 * Initialize an EGL context for the current display.
79 EGLContext fghCreateNewContextEGL( SFG_Window* window ) {
83 EGLDisplay eglDisplay = fgDisplay.pDisplay.egl.Display;
84 EGLConfig eglConfig = window->Window.pContext.egl.Config;
86 /* On GLES, user specifies the target version with glutInitContextVersion */
87 EGLint attributes[32];
89 ATTRIB_VAL(EGL_CONTEXT_CLIENT_VERSION, fgState.MajorVersion);
92 context = eglCreateContext(eglDisplay, eglConfig, EGL_NO_CONTEXT, attributes);
93 if (context == EGL_NO_CONTEXT) {
94 fgWarning("Cannot initialize EGL context, err=%x\n", eglGetError());
95 fghContextCreationError();
98 eglQueryContext(fgDisplay.pDisplay.egl.Display, context, EGL_CONTEXT_CLIENT_VERSION, &ver);
99 if (ver != fgState.MajorVersion)
100 fgError("Wrong GLES major version: %d\n", ver);
105 void fgPlatformSetWindow ( SFG_Window *window )
107 if ( window != fgStructure.CurrentWindow && window) {
108 if (eglMakeCurrent(fgDisplay.pDisplay.egl.Display,
109 window->Window.pContext.egl.Surface,
110 window->Window.pContext.egl.Surface,
111 window->Window.Context) == EGL_FALSE)
112 fgError("eglMakeCurrent: err=%x\n", eglGetError());
117 * Really opens a window when handle is available
119 void fghPlatformOpenWindowEGL( SFG_Window* window )
121 EGLDisplay display = fgDisplay.pDisplay.egl.Display;
122 EGLConfig config = window->Window.pContext.egl.Config;
124 EGLSurface surface = eglCreateWindowSurface(display, config, window->Window.Handle, NULL);
125 if (surface == EGL_NO_SURFACE)
126 fgError("Cannot create EGL window surface, err=%x\n", eglGetError());
127 window->Window.pContext.egl.Surface = surface;
129 fgPlatformSetWindow(window);
132 /* eglQuerySurface(display, surface, EGL_WIDTH, &w); */
133 /* eglQuerySurface(display, surface, EGL_HEIGHT, &h); */
138 * Closes a window, destroying the frame and OpenGL context
140 void fghPlatformCloseWindowEGL( SFG_Window* window )
142 /* Based on fg_window_mswin fgPlatformCloseWindow */
143 if( fgStructure.CurrentWindow == window )
144 eglMakeCurrent(fgDisplay.pDisplay.egl.Display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
146 if (window->Window.Context != EGL_NO_CONTEXT) {
147 /* Step through the list of windows. If the rendering context is not being used by another window, then delete it */
149 GLboolean used = GL_FALSE;
152 for( iter = (SFG_Window*)fgStructure.Windows.First;
153 iter && used == GL_FALSE;
154 iter = (SFG_Window*)iter->Node.Next)
156 if( (iter->Window.Context == window->Window.Context) &&
162 eglDestroyContext(fgDisplay.pDisplay.egl.Display, window->Window.Context);
164 window->Window.Context = EGL_NO_CONTEXT;
167 if (window->Window.pContext.egl.Surface != EGL_NO_SURFACE) {
168 eglDestroySurface(fgDisplay.pDisplay.egl.Display, window->Window.pContext.egl.Surface);
169 window->Window.pContext.egl.Surface = EGL_NO_SURFACE;