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comparison mupdf-source/thirdparty/freeglut/src/egl/fg_window_egl.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /*
2 * fg_display_android.c
3 *
4 * Window management methods for EGL
5 *
6 * Copyright (C) 2012, 2014 Sylvain Beucler
7 *
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:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
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.
24 */
25
26 #include <GL/freeglut.h>
27 #include "fg_internal.h"
28
29 int fghChooseConfig(EGLConfig* config) {
30 EGLint attributes[32];
31 int where = 0;
32 ATTRIB_VAL(EGL_SURFACE_TYPE, EGL_WINDOW_BIT);
33 #ifdef EGL_OPENGL_ES3_BIT
34 if (fgDisplay.pDisplay.egl.MinorVersion >= 5 && fgState.MajorVersion >= 3) {
35 ATTRIB_VAL(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT);
36 } else
37 #endif
38 if (fgState.MajorVersion >= 2) {
39 /*
40 * Khronos does not specify a EGL_OPENGL_ES3_BIT outside of the OpenGL extension "EGL_KHR_create_context" and EGL 1.5. There are numerous references on the internet
41 * that say to use EGL_OPENGL_ES3_BIT (pre-EGL 1.5), followed by many saying they can't find it in any headers. In fact, the official updated specification for EGL
42 * does not have any references to OpenGL ES 3.x. Tests have shown that EGL_OPENGL_ES2_BIT will work with ES 3.x.
43 */
44 ATTRIB_VAL(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT);
45 } else {
46 ATTRIB_VAL(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT);
47 }
48 /* Technically it's possible to request a standard OpenGL (non-ES)
49 context, but currently our build system assumes EGL => GLES */
50 /* attribs[i++] = EGL_RENDERABLE_TYPE; */
51 /* attribs[i++] = EGL_OPENGL_BIT; */
52 #ifdef TARGET_HOST_BLACKBERRY
53 /* Only 888 and 565 seem to work. Based on
54 http://qt.gitorious.org/qt/qtbase/source/893deb1a93021cdfabe038cdf1869de33a60cbc9:src/plugins/platforms/qnx/qqnxglcontext.cpp and
55 https://twitter.com/BlackBerryDev/status/380720927475912706 */
56 ATTRIB_VAL(EGL_BLUE_SIZE, 8);
57 ATTRIB_VAL(EGL_GREEN_SIZE, 8);
58 ATTRIB_VAL(EGL_RED_SIZE, 8);
59 #else
60 ATTRIB_VAL(EGL_BLUE_SIZE, 1);
61 ATTRIB_VAL(EGL_GREEN_SIZE, 1);
62 ATTRIB_VAL(EGL_RED_SIZE, 1);
63 #endif
64 ATTRIB_VAL(EGL_ALPHA_SIZE, (fgState.DisplayMode & GLUT_ALPHA) ? 1 : 0);
65 ATTRIB_VAL(EGL_DEPTH_SIZE, (fgState.DisplayMode & GLUT_DEPTH) ? 1 : 0);
66 ATTRIB_VAL(EGL_STENCIL_SIZE, (fgState.DisplayMode & GLUT_STENCIL) ? 1 : 0);
67 ATTRIB_VAL(EGL_SAMPLE_BUFFERS, (fgState.DisplayMode & GLUT_MULTISAMPLE) ? 1 : 0);
68 ATTRIB_VAL(EGL_SAMPLES, (fgState.DisplayMode & GLUT_MULTISAMPLE) ? fgState.SampleNumber : 0);
69 ATTRIB(EGL_NONE);
70
71 EGLint num_config;
72 if (!eglChooseConfig(fgDisplay.pDisplay.egl.Display,
73 attributes, config, 1, &num_config)) {
74 fgWarning("eglChooseConfig: error %x\n", eglGetError());
75 return 0;
76 }
77
78 return 1;
79 }
80
81 /**
82 * Initialize an EGL context for the current display.
83 */
84 EGLContext fghCreateNewContextEGL( SFG_Window* window ) {
85 EGLContext context;
86 EGLint ver = -1;
87
88 EGLDisplay eglDisplay = fgDisplay.pDisplay.egl.Display;
89 EGLConfig eglConfig = window->Window.pContext.egl.Config;
90
91 /* On GLES, user specifies the target version with glutInitContextVersion */
92 EGLint attributes[32];
93 int where = 0;
94 ATTRIB_VAL(EGL_CONTEXT_CLIENT_VERSION, fgState.MajorVersion);
95 #ifdef EGL_CONTEXT_MINOR_VERSION
96 if (fgDisplay.pDisplay.egl.MinorVersion >= 5) {
97 // EGL_CONTEXT_CLIENT_VERSION == EGL_CONTEXT_MAJOR_VERSION
98 ATTRIB_VAL(EGL_CONTEXT_MINOR_VERSION, fgState.MinorVersion);
99 }
100 #endif
101 ATTRIB(EGL_NONE);
102
103 context = eglCreateContext(eglDisplay, eglConfig, EGL_NO_CONTEXT, attributes);
104 if (context == EGL_NO_CONTEXT) {
105 fgWarning("Cannot initialize EGL context, err=%x\n", eglGetError());
106 fghContextCreationError();
107 }
108
109 eglQueryContext(fgDisplay.pDisplay.egl.Display, context, EGL_CONTEXT_CLIENT_VERSION, &ver);
110 if (ver != fgState.MajorVersion) {
111 fgError("Wrong GLES major version: %d\n", ver);
112 }
113 #ifdef EGL_CONTEXT_MINOR_VERSION
114 if (fgDisplay.pDisplay.egl.MinorVersion >= 5) {
115 eglQueryContext(fgDisplay.pDisplay.egl.Display, context, EGL_CONTEXT_MINOR_VERSION, &ver);
116 if (ver != fgState.MinorVersion) {
117 fgError("Wrong GLES minor version: %d\n", ver);
118 }
119 }
120 #endif
121
122 return context;
123 }
124
125 void fgPlatformSetWindow ( SFG_Window *window )
126 {
127 if ( window != fgStructure.CurrentWindow && window) {
128 if (eglMakeCurrent(fgDisplay.pDisplay.egl.Display,
129 window->Window.pContext.egl.Surface,
130 window->Window.pContext.egl.Surface,
131 window->Window.Context) == EGL_FALSE)
132 fgError("eglMakeCurrent: err=%x\n", eglGetError());
133 }
134 }
135
136 /*
137 * Really opens a window when handle is available
138 */
139 void fghPlatformOpenWindowEGL( SFG_Window* window )
140 {
141 EGLDisplay display = fgDisplay.pDisplay.egl.Display;
142 EGLConfig config = window->Window.pContext.egl.Config;
143
144 EGLSurface surface = eglCreateWindowSurface(display, config, window->Window.Handle, NULL);
145 if (surface == EGL_NO_SURFACE)
146 fgError("Cannot create EGL window surface, err=%x\n", eglGetError());
147 window->Window.pContext.egl.Surface = surface;
148
149 fgPlatformSetWindow(window);
150
151 /* EGLint w, h; */
152 /* eglQuerySurface(display, surface, EGL_WIDTH, &w); */
153 /* eglQuerySurface(display, surface, EGL_HEIGHT, &h); */
154
155 }
156
157 /*
158 * Closes a window, destroying the frame and OpenGL context
159 */
160 void fghPlatformCloseWindowEGL( SFG_Window* window )
161 {
162 /* Based on fg_window_mswin fgPlatformCloseWindow */
163 if( fgStructure.CurrentWindow == window )
164 eglMakeCurrent(fgDisplay.pDisplay.egl.Display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
165
166 if (window->Window.Context != EGL_NO_CONTEXT) {
167 /* Step through the list of windows. If the rendering context is not being used by another window, then delete it */
168 {
169 GLboolean used = GL_FALSE;
170 SFG_Window *iter;
171
172 for( iter = (SFG_Window*)fgStructure.Windows.First;
173 iter && used == GL_FALSE;
174 iter = (SFG_Window*)iter->Node.Next)
175 {
176 if( (iter->Window.Context == window->Window.Context) &&
177 (iter != window) )
178 used = GL_TRUE;
179 }
180
181 if( !used )
182 eglDestroyContext(fgDisplay.pDisplay.egl.Display, window->Window.Context);
183 }
184 window->Window.Context = EGL_NO_CONTEXT;
185 }
186
187 if (window->Window.pContext.egl.Surface != EGL_NO_SURFACE) {
188 eglDestroySurface(fgDisplay.pDisplay.egl.Display, window->Window.pContext.egl.Surface);
189 window->Window.pContext.egl.Surface = EGL_NO_SURFACE;
190 }
191 }