1 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <memory> 6 7 #include "egl_stuff.h" 8 #include "main.h" 9 #include "xlib_window.h" 10 11 std::unique_ptr<GLInterface> g_main_gl_interface; 12 13 GLInterface* GLInterface::Create() { 14 return new EGLInterface; 15 } 16 17 bool EGLInterface::Init() { 18 if (!XlibInit()) 19 return false; 20 21 EGLNativeWindowType native_window = 22 static_cast<EGLNativeWindowType>(g_xlib_window); 23 surface_ = eglCreateWindowSurface(display_, config_, native_window, NULL); 24 CheckError(); 25 26 context_ = CreateContext(); 27 CheckError(); 28 29 eglMakeCurrent(display_, surface_, surface_, context_); 30 CheckError(); 31 32 eglQuerySurface(display_, surface_, EGL_WIDTH, &g_width); 33 eglQuerySurface(display_, surface_, EGL_HEIGHT, &g_height); 34 35 return true; 36 } 37 38 void EGLInterface::Cleanup() { 39 eglMakeCurrent(display_, NULL, NULL, NULL); 40 DeleteContext(context_); 41 eglDestroySurface(display_, surface_); 42 } 43 44 XVisualInfo* EGLInterface::GetXVisual() { 45 if (!config_) { 46 EGLint attribs[] = { 47 EGL_RED_SIZE, 1, 48 EGL_GREEN_SIZE, 1, 49 EGL_BLUE_SIZE, 1, 50 EGL_DEPTH_SIZE, 1, 51 EGL_STENCIL_SIZE, 1, 52 EGL_SURFACE_TYPE, EGL_WINDOW_BIT, 53 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, 54 EGL_NONE}; 55 56 EGLNativeDisplayType native_display = 57 static_cast<EGLNativeDisplayType>(g_xlib_display); 58 59 display_ = eglGetDisplay(native_display); 60 CheckError(); 61 62 eglInitialize(display_, NULL, NULL); 63 CheckError(); 64 65 EGLint num_configs = -1; 66 eglGetConfigs(display_, NULL, 0, &num_configs); 67 CheckError(); 68 69 eglChooseConfig(display_, attribs, &config_, 1, &num_configs); 70 CheckError(); 71 } 72 73 // TODO: for some reason on some systems EGL_NATIVE_VISUAL_ID returns an ID 74 // that XVisualIDFromVisual cannot find. Use default visual until this is 75 // resolved. 76 #if 0 77 EGLint visual_id; 78 eglGetConfigAttrib(display_, config_, EGL_NATIVE_VISUAL_ID, &visual_id); 79 CheckError(); 80 XVisualInfo vinfo_template; 81 vinfo_template.visualid = static_cast<VisualID>(visual_id); 82 #else 83 XVisualInfo vinfo_template; 84 vinfo_template.visualid = XVisualIDFromVisual( 85 DefaultVisual(g_xlib_display, DefaultScreen(g_xlib_display))); 86 #endif 87 88 int nitems = 0; 89 XVisualInfo* ret = 90 XGetVisualInfo(g_xlib_display, VisualIDMask, &vinfo_template, &nitems); 91 CHECK(nitems == 1); 92 return ret; 93 } 94 95 void EGLInterface::SwapBuffers() { 96 eglSwapBuffers(display_, surface_); 97 } 98 99 bool EGLInterface::SwapInterval(int interval) { 100 return (eglSwapInterval(display_, interval) == EGL_TRUE); 101 } 102 103 bool EGLInterface::MakeCurrent(const GLContext& context) { 104 return eglMakeCurrent(display_, surface_, surface_, context); 105 } 106 107 const GLContext EGLInterface::CreateContext() { 108 EGLint attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE}; 109 CHECK(display_ != EGL_NO_DISPLAY); 110 CHECK(config_); 111 return eglCreateContext(display_, config_, NULL, attribs); 112 } 113 114 void EGLInterface::CheckError() { 115 CHECK_EQ(eglGetError(), EGL_SUCCESS); 116 } 117 118 void EGLInterface::DeleteContext(const GLContext& context) { 119 eglDestroyContext(display_, context); 120 } 121 122 void EGLInterface::TerminateGL() { 123 eglDestroySurface(display_, surface_); 124 eglTerminate(display_); 125 } 126
