1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/gpu/gl/android/SkNativeGLContext_android.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,173 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2011 Google Inc.
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +#include "gl/SkNativeGLContext.h"
1.12 +
1.13 +SkNativeGLContext::AutoContextRestore::AutoContextRestore() {
1.14 + fOldEGLContext = eglGetCurrentContext();
1.15 + fOldDisplay = eglGetCurrentDisplay();
1.16 + fOldSurface = eglGetCurrentSurface(EGL_DRAW);
1.17 +
1.18 +}
1.19 +
1.20 +SkNativeGLContext::AutoContextRestore::~AutoContextRestore() {
1.21 + if (NULL != fOldDisplay) {
1.22 + eglMakeCurrent(fOldDisplay, fOldSurface, fOldSurface, fOldEGLContext);
1.23 + }
1.24 +}
1.25 +
1.26 +///////////////////////////////////////////////////////////////////////////////
1.27 +
1.28 +SkNativeGLContext::SkNativeGLContext()
1.29 + : fContext(EGL_NO_CONTEXT)
1.30 + , fDisplay(EGL_NO_DISPLAY)
1.31 + , fSurface(EGL_NO_SURFACE) {
1.32 +}
1.33 +
1.34 +SkNativeGLContext::~SkNativeGLContext() {
1.35 + this->destroyGLContext();
1.36 +}
1.37 +
1.38 +void SkNativeGLContext::destroyGLContext() {
1.39 + if (fDisplay) {
1.40 + eglMakeCurrent(fDisplay, 0, 0, 0);
1.41 +
1.42 + if (fContext) {
1.43 + eglDestroyContext(fDisplay, fContext);
1.44 + fContext = EGL_NO_CONTEXT;
1.45 + }
1.46 +
1.47 + if (fSurface) {
1.48 + eglDestroySurface(fDisplay, fSurface);
1.49 + fSurface = EGL_NO_SURFACE;
1.50 + }
1.51 +
1.52 + //TODO should we close the display?
1.53 + fDisplay = EGL_NO_DISPLAY;
1.54 + }
1.55 +}
1.56 +
1.57 +const GrGLInterface* SkNativeGLContext::createGLContext() {
1.58 + static const EGLint kEGLContextAttribsForOpenGL[] = {
1.59 + EGL_NONE
1.60 + };
1.61 +
1.62 + static const EGLint kEGLContextAttribsForOpenGLES[] = {
1.63 + EGL_CONTEXT_CLIENT_VERSION, 2,
1.64 + EGL_NONE
1.65 + };
1.66 +
1.67 + static const struct {
1.68 + const EGLint* fContextAttribs;
1.69 + EGLenum fAPI;
1.70 + EGLint fRenderableTypeBit;
1.71 + GrGLStandard fStandard;
1.72 + } kAPIs[] = {
1.73 + { // OpenGL
1.74 + kEGLContextAttribsForOpenGL,
1.75 + EGL_OPENGL_API,
1.76 + EGL_OPENGL_BIT,
1.77 + kGL_GrGLStandard
1.78 + },
1.79 + { // OpenGL ES. This seems to work for both ES2 and 3 (when available).
1.80 + kEGLContextAttribsForOpenGLES,
1.81 + EGL_OPENGL_ES_API,
1.82 + EGL_OPENGL_ES2_BIT,
1.83 + kGLES_GrGLStandard
1.84 + },
1.85 + };
1.86 +
1.87 + const GrGLInterface* interface = NULL;
1.88 +
1.89 + for (size_t api = 0; NULL == interface && api < SK_ARRAY_COUNT(kAPIs); ++api) {
1.90 + fDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
1.91 +
1.92 + EGLint majorVersion;
1.93 + EGLint minorVersion;
1.94 + eglInitialize(fDisplay, &majorVersion, &minorVersion);
1.95 +
1.96 +#if 0
1.97 + SkDebugf("VENDOR: %s\n", eglQueryString(fDisplay, EGL_VENDOR));
1.98 + SkDebugf("APIS: %s\n", eglQueryString(fDisplay, EGL_CLIENT_APIS));
1.99 + SkDebugf("VERSION: %s\n", eglQueryString(fDisplay, EGL_VERSION));
1.100 + SkDebugf("EXTENSIONS %s\n", eglQueryString(fDisplay, EGL_EXTENSIONS));
1.101 +#endif
1.102 +
1.103 + if (!eglBindAPI(kAPIs[api].fAPI)) {
1.104 + continue;
1.105 + }
1.106 +
1.107 + EGLint numConfigs;
1.108 + const EGLint configAttribs[] = {
1.109 + EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
1.110 + EGL_RENDERABLE_TYPE, kAPIs[api].fRenderableTypeBit,
1.111 + EGL_RED_SIZE, 8,
1.112 + EGL_GREEN_SIZE, 8,
1.113 + EGL_BLUE_SIZE, 8,
1.114 + EGL_ALPHA_SIZE, 8,
1.115 + EGL_NONE
1.116 + };
1.117 +
1.118 + EGLConfig surfaceConfig;
1.119 + if (!eglChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs)) {
1.120 + SkDebugf("eglChooseConfig failed. EGL Error: 0x%08x\n", eglGetError());
1.121 + continue;
1.122 + }
1.123 +
1.124 + fContext = eglCreateContext(fDisplay, surfaceConfig, NULL, kAPIs[api].fContextAttribs);
1.125 + if (EGL_NO_CONTEXT == fContext) {
1.126 + SkDebugf("eglCreateContext failed. EGL Error: 0x%08x\n", eglGetError());
1.127 + continue;
1.128 + }
1.129 +
1.130 + static const EGLint kSurfaceAttribs[] = {
1.131 + EGL_WIDTH, 1,
1.132 + EGL_HEIGHT, 1,
1.133 + EGL_NONE
1.134 + };
1.135 +
1.136 + fSurface = eglCreatePbufferSurface(fDisplay, surfaceConfig, kSurfaceAttribs);
1.137 + if (EGL_NO_SURFACE == fSurface) {
1.138 + SkDebugf("eglCreatePbufferSurface failed. EGL Error: 0x%08x\n", eglGetError());
1.139 + this->destroyGLContext();
1.140 + continue;
1.141 + }
1.142 +
1.143 + if (!eglMakeCurrent(fDisplay, fSurface, fSurface, fContext)) {
1.144 + SkDebugf("eglMakeCurrent failed. EGL Error: 0x%08x\n", eglGetError());
1.145 + this->destroyGLContext();
1.146 + continue;
1.147 + }
1.148 +
1.149 + interface = GrGLCreateNativeInterface();
1.150 + if (NULL == interface) {
1.151 + SkDebugf("Failed to create gl interface.\n");
1.152 + this->destroyGLContext();
1.153 + continue;
1.154 + }
1.155 +
1.156 + if (!interface->validate()) {
1.157 + interface->unref();
1.158 + interface = NULL;
1.159 + this->destroyGLContext();
1.160 + }
1.161 + }
1.162 +
1.163 + return interface;
1.164 +}
1.165 +
1.166 +void SkNativeGLContext::makeCurrent() const {
1.167 + if (!eglMakeCurrent(fDisplay, fSurface, fSurface, fContext)) {
1.168 + SkDebugf("Could not set the context.\n");
1.169 + }
1.170 +}
1.171 +
1.172 +void SkNativeGLContext::swapBuffers() const {
1.173 + if (!eglSwapBuffers(fDisplay, fSurface)) {
1.174 + SkDebugf("Could not complete eglSwapBuffers.\n");
1.175 + }
1.176 +}
