The Tor Browser: gfx/skia/trunk/src/gpu/gl/angle/SkANGLEGLContext.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     2 /*

     3  * Copyright 2012 Google Inc.

     4  *

     5  * Use of this source code is governed by a BSD-style license that can be

     6  * found in the LICENSE file.

     7  */

     9 #include "gl/SkANGLEGLContext.h"

    11 SkANGLEGLContext::AutoContextRestore::AutoContextRestore() {

    12     fOldEGLContext = eglGetCurrentContext();

    13     fOldDisplay = eglGetCurrentDisplay();

    14     fOldSurface = eglGetCurrentSurface(EGL_DRAW);

    16 }

    18 SkANGLEGLContext::AutoContextRestore::~AutoContextRestore() {

    19     if (NULL != fOldDisplay) {

    20         eglMakeCurrent(fOldDisplay, fOldSurface, fOldSurface, fOldEGLContext);

    21     }

    22 }

    24 ///////////////////////////////////////////////////////////////////////////////

    26 SkANGLEGLContext::SkANGLEGLContext()

    27     : fContext(EGL_NO_CONTEXT)

    28     , fDisplay(EGL_NO_DISPLAY)

    29     , fSurface(EGL_NO_SURFACE) {

    30 }

    32 SkANGLEGLContext::~SkANGLEGLContext() {

    33     this->destroyGLContext();

    34 }

    36 void SkANGLEGLContext::destroyGLContext() {

    37     if (fDisplay) {

    38         eglMakeCurrent(fDisplay, 0, 0, 0);

    40         if (fContext) {

    41             eglDestroyContext(fDisplay, fContext);

    42             fContext = EGL_NO_CONTEXT;

    43         }

    45         if (fSurface) {

    46             eglDestroySurface(fDisplay, fSurface);

    47             fSurface = EGL_NO_SURFACE;

    48         }

    50         //TODO should we close the display?

    51         fDisplay = EGL_NO_DISPLAY;

    52     }

    53 }

    55 const GrGLInterface* SkANGLEGLContext::createGLContext() {

    57     fDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);

    59     EGLint majorVersion;

    60     EGLint minorVersion;

    61     eglInitialize(fDisplay, &majorVersion, &minorVersion);

    63     EGLint numConfigs;

    64     static const EGLint configAttribs[] = {

    65         EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,

    66         EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,

    67         EGL_RED_SIZE, 8,

    68         EGL_GREEN_SIZE, 8,

    69         EGL_BLUE_SIZE, 8,

    70         EGL_ALPHA_SIZE, 8,

    71         EGL_NONE

    72     };

    74     EGLConfig surfaceConfig;

    75     eglChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs);

    77     static const EGLint contextAttribs[] = {

    78         EGL_CONTEXT_CLIENT_VERSION, 2,

    79         EGL_NONE

    80     };

    81     fContext = eglCreateContext(fDisplay, surfaceConfig, NULL, contextAttribs);

    84     static const EGLint surfaceAttribs[] = {

    85             EGL_WIDTH, 1,

    86             EGL_HEIGHT, 1,

    87             EGL_NONE

    88         };

    89     fSurface = eglCreatePbufferSurface(fDisplay, surfaceConfig, surfaceAttribs);

    91     eglMakeCurrent(fDisplay, fSurface, fSurface, fContext);

    93     const GrGLInterface* interface = GrGLCreateANGLEInterface();

    94     if (NULL == interface) {

    95         SkDebugf("Could not create ANGLE GL interface!\n");

    96         this->destroyGLContext();

    97         return NULL;

    98     }

   100     return interface;

   101 }

   103 void SkANGLEGLContext::makeCurrent() const {

   104     if (!eglMakeCurrent(fDisplay, fSurface, fSurface, fContext)) {

   105         SkDebugf("Could not set the context.\n");

   106     }

   107 }

   109 void SkANGLEGLContext::swapBuffers() const {

   110     if (!eglSwapBuffers(fDisplay, fSurface)) {

   111         SkDebugf("Could not complete eglSwapBuffers.\n");

   112     }

   113 }

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