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| 1 /* | |
| 2 * Copyright (C) 2012 Intel Corporation. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' | |
| 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS | |
| 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
| 23 * THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "EGLContext.h" | |
| 28 | |
| 29 #if USE(EGL) | |
| 30 | |
| 31 #include <wtf/text/WTFString.h> | |
| 32 | |
| 33 namespace WebCore { | |
| 34 | |
| 35 static const EGLint contextAttributes[] = { | |
| 36 #if USE(OPENGL_ES_2) | |
| 37 EGL_CONTEXT_CLIENT_VERSION, 2, | |
| 38 #endif | |
| 39 EGL_NONE | |
| 40 }; | |
| 41 | |
| 42 static const EGLint contextRobustnessAttributes[] = { | |
| 43 #if USE(OPENGL_ES_2) | |
| 44 EGL_CONTEXT_CLIENT_VERSION, 2, | |
| 45 #endif | |
| 46 EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT, | |
| 47 EGL_LOSE_CONTEXT_ON_RESET_EXT, | |
| 48 EGL_NONE | |
| 49 }; | |
| 50 | |
| 51 static bool isRobustnessExtSupported(EGLDisplay display) | |
| 52 { | |
| 53 static bool didQueryForRobustnessExtension = false; | |
| 54 static bool isRobustnessExtensionSupported = false; | |
| 55 | |
| 56 if (!didQueryForRobustnessExtension) { | |
| 57 didQueryForRobustnessExtension = true; | |
| 58 isRobustnessExtensionSupported = GLPlatformContext::supportsEGLExtension
(display, "EGL_EXT_create_context_robustness"); | |
| 59 } | |
| 60 | |
| 61 return isRobustnessExtensionSupported; | |
| 62 } | |
| 63 | |
| 64 EGLOffScreenContext::EGLOffScreenContext() | |
| 65 : GLPlatformContext() | |
| 66 , m_display(0) | |
| 67 { | |
| 68 } | |
| 69 | |
| 70 bool EGLOffScreenContext::initialize(GLPlatformSurface* surface, PlatformContext
sharedContext) | |
| 71 { | |
| 72 if (!surface) | |
| 73 return false; | |
| 74 | |
| 75 if (!eglBindAPI(eglAPIVersion)) { | |
| 76 LOG_ERROR("Failed to set EGL API(%d).", eglGetError()); | |
| 77 return false; | |
| 78 } | |
| 79 | |
| 80 m_display = surface->sharedDisplay(); | |
| 81 if (!m_display) | |
| 82 return false; | |
| 83 | |
| 84 EGLConfig config = surface->configuration(); | |
| 85 if (!config) | |
| 86 return false; | |
| 87 | |
| 88 if (isRobustnessExtSupported(m_display)) | |
| 89 m_contextHandle = eglCreateContext(m_display, config, sharedContext, con
textRobustnessAttributes); | |
| 90 | |
| 91 if (m_contextHandle != EGL_NO_CONTEXT) { | |
| 92 // The EGL_EXT_create_context_robustness spec requires that a context cr
eated with | |
| 93 // EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT bit set must also
support GL_EXT_robustness or | |
| 94 // a version of OpenGL incorporating equivalent functionality. | |
| 95 // The spec also defines similar requirements for attribute EGL_LOSE_CON
TEXT_ON_RESET_EXT. | |
| 96 if (platformMakeCurrent(surface) && (GLPlatformContext::supportsGLExtens
ion("GL_EXT_robustness"))) | |
| 97 m_resetLostContext = true; | |
| 98 else | |
| 99 eglDestroyContext(m_display, m_contextHandle); | |
| 100 } | |
| 101 | |
| 102 if (m_contextHandle == EGL_NO_CONTEXT) | |
| 103 m_contextHandle = eglCreateContext(m_display, config, sharedContext, con
textAttributes); | |
| 104 | |
| 105 if (m_contextHandle != EGL_NO_CONTEXT) | |
| 106 return true; | |
| 107 | |
| 108 return false; | |
| 109 } | |
| 110 | |
| 111 EGLOffScreenContext::~EGLOffScreenContext() | |
| 112 { | |
| 113 } | |
| 114 | |
| 115 bool EGLOffScreenContext::isCurrentContext() const | |
| 116 { | |
| 117 return m_contextHandle == eglGetCurrentContext(); | |
| 118 } | |
| 119 | |
| 120 bool EGLOffScreenContext::platformMakeCurrent(GLPlatformSurface* surface) | |
| 121 { | |
| 122 if (!eglMakeCurrent(m_display, surface->drawable(), surface->drawable(), m_c
ontextHandle)) { | |
| 123 LOG_ERROR("Failed to make context current(%d).", eglGetError()); | |
| 124 | |
| 125 if (m_resetLostContext && eglGetError() == EGL_CONTEXT_LOST) { | |
| 126 LOG_ERROR("Lost current context."); | |
| 127 m_contextLost = true; | |
| 128 } | |
| 129 | |
| 130 return false; | |
| 131 } | |
| 132 | |
| 133 return true; | |
| 134 } | |
| 135 | |
| 136 void EGLOffScreenContext::platformReleaseCurrent() | |
| 137 { | |
| 138 eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); | |
| 139 } | |
| 140 | |
| 141 void EGLOffScreenContext::freeResources() | |
| 142 { | |
| 143 if (m_contextHandle == EGL_NO_CONTEXT) | |
| 144 return; | |
| 145 | |
| 146 eglDestroyContext(m_display, m_contextHandle); | |
| 147 m_contextHandle = EGL_NO_CONTEXT; | |
| 148 m_display = 0; | |
| 149 } | |
| 150 | |
| 151 void EGLOffScreenContext::destroy() | |
| 152 { | |
| 153 GLPlatformContext::destroy(); | |
| 154 freeResources(); | |
| 155 } | |
| 156 | |
| 157 } | |
| 158 | |
| 159 #endif | |
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Chromium Code Reviews
Issue 13642009:
WebCore: Remove PLATFORM(WIN) files we do not use. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk