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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 18:07:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 18:07:22 +0000
commitc04dcc2e7d834218ef2d4194331e383402495ae1 (patch)
tree7333e38d10d75386e60f336b80c2443c1166031d /xbmc/utils/EGLUtils.cpp
parentInitial commit. (diff)
downloadkodi-c04dcc2e7d834218ef2d4194331e383402495ae1.tar.xz
kodi-c04dcc2e7d834218ef2d4194331e383402495ae1.zip
Adding upstream version 2:20.4+dfsg.upstream/2%20.4+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'xbmc/utils/EGLUtils.cpp')
-rw-r--r--xbmc/utils/EGLUtils.cpp598
1 files changed, 598 insertions, 0 deletions
diff --git a/xbmc/utils/EGLUtils.cpp b/xbmc/utils/EGLUtils.cpp
new file mode 100644
index 0000000..7c5e709
--- /dev/null
+++ b/xbmc/utils/EGLUtils.cpp
@@ -0,0 +1,598 @@
+/*
+ * Copyright (C) 2017-2018 Team Kodi
+ * This file is part of Kodi - https://kodi.tv
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ * See LICENSES/README.md for more information.
+ */
+
+#include "EGLUtils.h"
+
+#include "ServiceBroker.h"
+#include "StringUtils.h"
+#include "guilib/IDirtyRegionSolver.h"
+#include "log.h"
+#include "settings/AdvancedSettings.h"
+#include "settings/SettingsComponent.h"
+
+#include <map>
+
+#include <EGL/eglext.h>
+
+namespace
+{
+
+#define X(VAL) std::make_pair(VAL, #VAL)
+std::map<EGLint, const char*> eglAttributes =
+{
+ // please keep attributes in accordance to:
+ // https://www.khronos.org/registry/EGL/sdk/docs/man/html/eglGetConfigAttrib.xhtml
+ X(EGL_ALPHA_SIZE),
+ X(EGL_ALPHA_MASK_SIZE),
+ X(EGL_BIND_TO_TEXTURE_RGB),
+ X(EGL_BIND_TO_TEXTURE_RGBA),
+ X(EGL_BLUE_SIZE),
+ X(EGL_BUFFER_SIZE),
+ X(EGL_COLOR_BUFFER_TYPE),
+ X(EGL_CONFIG_CAVEAT),
+ X(EGL_CONFIG_ID),
+ X(EGL_CONFORMANT),
+ X(EGL_DEPTH_SIZE),
+ X(EGL_GREEN_SIZE),
+ X(EGL_LEVEL),
+ X(EGL_LUMINANCE_SIZE),
+ X(EGL_MAX_PBUFFER_WIDTH),
+ X(EGL_MAX_PBUFFER_HEIGHT),
+ X(EGL_MAX_PBUFFER_PIXELS),
+ X(EGL_MAX_SWAP_INTERVAL),
+ X(EGL_MIN_SWAP_INTERVAL),
+ X(EGL_NATIVE_RENDERABLE),
+ X(EGL_NATIVE_VISUAL_ID),
+ X(EGL_NATIVE_VISUAL_TYPE),
+ X(EGL_RED_SIZE),
+ X(EGL_RENDERABLE_TYPE),
+ X(EGL_SAMPLE_BUFFERS),
+ X(EGL_SAMPLES),
+ X(EGL_STENCIL_SIZE),
+ X(EGL_SURFACE_TYPE),
+ X(EGL_TRANSPARENT_TYPE),
+ X(EGL_TRANSPARENT_RED_VALUE),
+ X(EGL_TRANSPARENT_GREEN_VALUE),
+ X(EGL_TRANSPARENT_BLUE_VALUE)
+};
+
+std::map<EGLenum, const char*> eglErrors =
+{
+ // please keep errors in accordance to:
+ // https://www.khronos.org/registry/EGL/sdk/docs/man/html/eglGetError.xhtml
+ X(EGL_SUCCESS),
+ X(EGL_NOT_INITIALIZED),
+ X(EGL_BAD_ACCESS),
+ X(EGL_BAD_ALLOC),
+ X(EGL_BAD_ATTRIBUTE),
+ X(EGL_BAD_CONFIG),
+ X(EGL_BAD_CONTEXT),
+ X(EGL_BAD_CURRENT_SURFACE),
+ X(EGL_BAD_DISPLAY),
+ X(EGL_BAD_MATCH),
+ X(EGL_BAD_NATIVE_PIXMAP),
+ X(EGL_BAD_NATIVE_WINDOW),
+ X(EGL_BAD_PARAMETER),
+ X(EGL_BAD_SURFACE),
+ X(EGL_CONTEXT_LOST),
+};
+
+std::map<EGLint, const char*> eglErrorType =
+{
+ X(EGL_DEBUG_MSG_CRITICAL_KHR),
+ X(EGL_DEBUG_MSG_ERROR_KHR),
+ X(EGL_DEBUG_MSG_WARN_KHR),
+ X(EGL_DEBUG_MSG_INFO_KHR),
+};
+#undef X
+
+} // namespace
+
+void EglErrorCallback(EGLenum error,
+ const char* command,
+ EGLint messageType,
+ EGLLabelKHR threadLabel,
+ EGLLabelKHR objectLabel,
+ const char* message)
+{
+ std::string errorStr;
+ std::string typeStr;
+
+ auto eglError = eglErrors.find(error);
+ if (eglError != eglErrors.end())
+ {
+ errorStr = eglError->second;
+ }
+
+ auto eglType = eglErrorType.find(messageType);
+ if (eglType != eglErrorType.end())
+ {
+ typeStr = eglType->second;
+ }
+
+ CLog::Log(LOGDEBUG, "EGL Debugging:\nError: {}\nCommand: {}\nType: {}\nMessage: {}", errorStr, command, typeStr, message);
+}
+
+std::set<std::string> CEGLUtils::GetClientExtensions()
+{
+ const char* extensions = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
+ if (!extensions)
+ {
+ return {};
+ }
+ std::set<std::string> result;
+ StringUtils::SplitTo(std::inserter(result, result.begin()), extensions, " ");
+ return result;
+}
+
+std::set<std::string> CEGLUtils::GetExtensions(EGLDisplay eglDisplay)
+{
+ const char* extensions = eglQueryString(eglDisplay, EGL_EXTENSIONS);
+ if (!extensions)
+ {
+ throw std::runtime_error("Could not query EGL for extensions");
+ }
+ std::set<std::string> result;
+ StringUtils::SplitTo(std::inserter(result, result.begin()), extensions, " ");
+ return result;
+}
+
+bool CEGLUtils::HasExtension(EGLDisplay eglDisplay, const std::string& name)
+{
+ auto exts = GetExtensions(eglDisplay);
+ return (exts.find(name) != exts.end());
+}
+
+bool CEGLUtils::HasClientExtension(const std::string& name)
+{
+ auto exts = GetClientExtensions();
+ return (exts.find(name) != exts.end());
+}
+
+void CEGLUtils::Log(int logLevel, const std::string& what)
+{
+ EGLenum error = eglGetError();
+ std::string errorStr = StringUtils::Format("{:#04X}", error);
+
+ auto eglError = eglErrors.find(error);
+ if (eglError != eglErrors.end())
+ {
+ errorStr = eglError->second;
+ }
+
+ CLog::Log(logLevel, "{} ({})", what, errorStr);
+}
+
+CEGLContextUtils::CEGLContextUtils(EGLenum platform, std::string const& platformExtension)
+: m_platform{platform}
+{
+ if (CEGLUtils::HasClientExtension("EGL_KHR_debug"))
+ {
+ auto eglDebugMessageControl = CEGLUtils::GetRequiredProcAddress<PFNEGLDEBUGMESSAGECONTROLKHRPROC>("eglDebugMessageControlKHR");
+
+ EGLAttrib eglDebugAttribs[] = {EGL_DEBUG_MSG_CRITICAL_KHR, EGL_TRUE,
+ EGL_DEBUG_MSG_ERROR_KHR, EGL_TRUE,
+ EGL_DEBUG_MSG_WARN_KHR, EGL_TRUE,
+ EGL_DEBUG_MSG_INFO_KHR, EGL_TRUE,
+ EGL_NONE};
+
+ eglDebugMessageControl(EglErrorCallback, eglDebugAttribs);
+ }
+
+ m_platformSupported = CEGLUtils::HasClientExtension("EGL_EXT_platform_base") && CEGLUtils::HasClientExtension(platformExtension);
+}
+
+bool CEGLContextUtils::IsPlatformSupported() const
+{
+ return m_platformSupported;
+}
+
+CEGLContextUtils::~CEGLContextUtils()
+{
+ Destroy();
+}
+
+bool CEGLContextUtils::CreateDisplay(EGLNativeDisplayType nativeDisplay)
+{
+ if (m_eglDisplay != EGL_NO_DISPLAY)
+ {
+ throw std::logic_error("Do not call CreateDisplay when display has already been created");
+ }
+
+ m_eglDisplay = eglGetDisplay(nativeDisplay);
+ if (m_eglDisplay == EGL_NO_DISPLAY)
+ {
+ CEGLUtils::Log(LOGERROR, "failed to get EGL display");
+ return false;
+ }
+
+ return true;
+}
+
+bool CEGLContextUtils::CreatePlatformDisplay(void* nativeDisplay, EGLNativeDisplayType nativeDisplayLegacy)
+{
+ if (m_eglDisplay != EGL_NO_DISPLAY)
+ {
+ throw std::logic_error("Do not call CreateDisplay when display has already been created");
+ }
+
+#if defined(EGL_EXT_platform_base)
+ if (IsPlatformSupported())
+ {
+ // Theoretically it is possible to use eglGetDisplay() and eglCreateWindowSurface,
+ // but then the EGL library basically has to guess which platform we want
+ // if it supports multiple which is usually the case -
+ // it's better and safer to make it explicit
+
+ auto getPlatformDisplayEXT = CEGLUtils::GetRequiredProcAddress<PFNEGLGETPLATFORMDISPLAYEXTPROC>("eglGetPlatformDisplayEXT");
+ m_eglDisplay = getPlatformDisplayEXT(m_platform, nativeDisplay, nullptr);
+
+ if (m_eglDisplay == EGL_NO_DISPLAY)
+ {
+ CEGLUtils::Log(LOGERROR, "failed to get platform display");
+ return false;
+ }
+ }
+#endif
+
+ if (m_eglDisplay == EGL_NO_DISPLAY)
+ {
+ return CreateDisplay(nativeDisplayLegacy);
+ }
+
+ return true;
+}
+
+bool CEGLContextUtils::InitializeDisplay(EGLint renderingApi)
+{
+ if (!eglInitialize(m_eglDisplay, nullptr, nullptr))
+ {
+ CEGLUtils::Log(LOGERROR, "failed to initialize EGL display");
+ Destroy();
+ return false;
+ }
+
+ const char* value;
+ value = eglQueryString(m_eglDisplay, EGL_VERSION);
+ CLog::Log(LOGINFO, "EGL_VERSION = {}", value ? value : "NULL");
+
+ value = eglQueryString(m_eglDisplay, EGL_VENDOR);
+ CLog::Log(LOGINFO, "EGL_VENDOR = {}", value ? value : "NULL");
+
+ value = eglQueryString(m_eglDisplay, EGL_EXTENSIONS);
+ CLog::Log(LOGINFO, "EGL_EXTENSIONS = {}", value ? value : "NULL");
+
+ value = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
+ CLog::Log(LOGINFO, "EGL_CLIENT_EXTENSIONS = {}", value ? value : "NULL");
+
+ if (eglBindAPI(renderingApi) != EGL_TRUE)
+ {
+ CEGLUtils::Log(LOGERROR, "failed to bind EGL API");
+ Destroy();
+ return false;
+ }
+
+ return true;
+}
+
+bool CEGLContextUtils::ChooseConfig(EGLint renderableType, EGLint visualId, bool hdr)
+{
+ EGLint numMatched{0};
+
+ if (m_eglDisplay == EGL_NO_DISPLAY)
+ {
+ throw std::logic_error("Choosing an EGLConfig requires an EGL display");
+ }
+
+ EGLint surfaceType = EGL_WINDOW_BIT;
+ // for the non-trivial dirty region modes, we need the EGL buffer to be preserved across updates
+ int guiAlgorithmDirtyRegions = CServiceBroker::GetSettingsComponent()->GetAdvancedSettings()->m_guiAlgorithmDirtyRegions;
+ if (guiAlgorithmDirtyRegions == DIRTYREGION_SOLVER_COST_REDUCTION ||
+ guiAlgorithmDirtyRegions == DIRTYREGION_SOLVER_UNION)
+ surfaceType |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
+
+ CEGLAttributesVec attribs;
+ attribs.Add({{EGL_RED_SIZE, 8},
+ {EGL_GREEN_SIZE, 8},
+ {EGL_BLUE_SIZE, 8},
+ {EGL_ALPHA_SIZE, 2},
+ {EGL_DEPTH_SIZE, 16},
+ {EGL_STENCIL_SIZE, 0},
+ {EGL_SAMPLE_BUFFERS, 0},
+ {EGL_SAMPLES, 0},
+ {EGL_SURFACE_TYPE, surfaceType},
+ {EGL_RENDERABLE_TYPE, renderableType}});
+
+ EGLConfig* currentConfig(hdr ? &m_eglHDRConfig : &m_eglConfig);
+
+ if (hdr)
+#if EGL_EXT_pixel_format_float
+ attribs.Add({{EGL_COLOR_COMPONENT_TYPE_EXT, EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT}});
+#else
+ return false;
+#endif
+
+ const char* errorMsg = nullptr;
+
+ if (eglChooseConfig(m_eglDisplay, attribs.Get(), nullptr, 0, &numMatched) != EGL_TRUE)
+ errorMsg = "failed to query number of EGL configs";
+
+ std::vector<EGLConfig> eglConfigs(numMatched);
+ if (eglChooseConfig(m_eglDisplay, attribs.Get(), eglConfigs.data(), numMatched, &numMatched) != EGL_TRUE)
+ errorMsg = "failed to find EGL configs with appropriate attributes";
+
+ if (errorMsg)
+ {
+ if (!hdr)
+ {
+ CEGLUtils::Log(LOGERROR, errorMsg);
+ Destroy();
+ }
+ else
+ CEGLUtils::Log(LOGINFO, errorMsg);
+ return false;
+ }
+
+ EGLint id{0};
+ for (const auto &eglConfig: eglConfigs)
+ {
+ *currentConfig = eglConfig;
+
+ if (visualId == 0)
+ break;
+
+ if (eglGetConfigAttrib(m_eglDisplay, *currentConfig, EGL_NATIVE_VISUAL_ID, &id) != EGL_TRUE)
+ CEGLUtils::Log(LOGERROR, "failed to query EGL attribute EGL_NATIVE_VISUAL_ID");
+
+ if (visualId == id)
+ break;
+ }
+
+ if (visualId != 0 && visualId != id)
+ {
+ CLog::Log(LOGDEBUG, "failed to find EGL config with EGL_NATIVE_VISUAL_ID={}", visualId);
+ return false;
+ }
+
+ CLog::Log(LOGDEBUG, "EGL {}Config Attributes:", hdr ? "HDR " : "");
+
+ for (const auto &eglAttribute : eglAttributes)
+ {
+ EGLint value{0};
+ if (eglGetConfigAttrib(m_eglDisplay, *currentConfig, eglAttribute.first, &value) != EGL_TRUE)
+ CEGLUtils::Log(LOGERROR,
+ StringUtils::Format("failed to query EGL attribute {}", eglAttribute.second));
+
+ // we only need to print the hex value if it's an actual EGL define
+ CLog::Log(LOGDEBUG, " {}: {}", eglAttribute.second,
+ (value >= 0x3000 && value <= 0x3200) ? StringUtils::Format("{:#04x}", value)
+ : std::to_string(value));
+ }
+
+ return true;
+}
+
+EGLint CEGLContextUtils::GetConfigAttrib(EGLint attribute) const
+{
+ EGLint value{0};
+ if (eglGetConfigAttrib(m_eglDisplay, m_eglConfig, attribute, &value) != EGL_TRUE)
+ CEGLUtils::Log(LOGERROR, "failed to query EGL attribute");
+ return value;
+}
+
+bool CEGLContextUtils::CreateContext(CEGLAttributesVec contextAttribs)
+{
+ if (m_eglContext != EGL_NO_CONTEXT)
+ {
+ throw std::logic_error("Do not call CreateContext when context has already been created");
+ }
+
+ EGLConfig eglConfig{m_eglConfig};
+
+ if (CEGLUtils::HasExtension(m_eglDisplay, "EGL_KHR_no_config_context"))
+ eglConfig = EGL_NO_CONFIG_KHR;
+
+ if (CEGLUtils::HasExtension(m_eglDisplay, "EGL_IMG_context_priority"))
+ contextAttribs.Add({{EGL_CONTEXT_PRIORITY_LEVEL_IMG, EGL_CONTEXT_PRIORITY_HIGH_IMG}});
+
+ if (CEGLUtils::HasExtension(m_eglDisplay, "EGL_KHR_create_context") &&
+ CServiceBroker::GetSettingsComponent()->GetAdvancedSettings()->m_openGlDebugging)
+ {
+ contextAttribs.Add({{EGL_CONTEXT_FLAGS_KHR, EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR}});
+ }
+
+ m_eglContext = eglCreateContext(m_eglDisplay, eglConfig,
+ EGL_NO_CONTEXT, contextAttribs.Get());
+
+ if (CEGLUtils::HasExtension(m_eglDisplay, "EGL_IMG_context_priority"))
+ {
+ EGLint value{EGL_CONTEXT_PRIORITY_MEDIUM_IMG};
+
+ if (eglQueryContext(m_eglDisplay, m_eglContext, EGL_CONTEXT_PRIORITY_LEVEL_IMG, &value) != EGL_TRUE)
+ CEGLUtils::Log(LOGERROR, "failed to query EGL context attribute EGL_CONTEXT_PRIORITY_LEVEL_IMG");
+
+ if (value != EGL_CONTEXT_PRIORITY_HIGH_IMG)
+ CLog::Log(LOGDEBUG, "Failed to obtain a high priority EGL context");
+ }
+
+ if (m_eglContext == EGL_NO_CONTEXT)
+ {
+ // This is expected to fail under some circumstances, so log as debug
+ CLog::Log(LOGDEBUG, "Failed to create EGL context (EGL error {})", eglGetError());
+ return false;
+ }
+
+ return true;
+}
+
+bool CEGLContextUtils::BindContext()
+{
+ if (m_eglDisplay == EGL_NO_DISPLAY || m_eglSurface == EGL_NO_SURFACE || m_eglContext == EGL_NO_CONTEXT)
+ {
+ throw std::logic_error("Activating an EGLContext requires display, surface, and context");
+ }
+
+ if (eglMakeCurrent(m_eglDisplay, m_eglSurface, m_eglSurface, m_eglContext) != EGL_TRUE)
+ {
+ CLog::Log(LOGERROR, "Failed to make context current {} {} {}", fmt::ptr(m_eglDisplay),
+ fmt::ptr(m_eglSurface), fmt::ptr(m_eglContext));
+ return false;
+ }
+
+ return true;
+}
+
+void CEGLContextUtils::SurfaceAttrib()
+{
+ if (m_eglDisplay == EGL_NO_DISPLAY || m_eglSurface == EGL_NO_SURFACE)
+ {
+ throw std::logic_error("Setting surface attributes requires a surface");
+ }
+
+ // for the non-trivial dirty region modes, we need the EGL buffer to be preserved across updates
+ int guiAlgorithmDirtyRegions = CServiceBroker::GetSettingsComponent()->GetAdvancedSettings()->m_guiAlgorithmDirtyRegions;
+ if (guiAlgorithmDirtyRegions == DIRTYREGION_SOLVER_COST_REDUCTION ||
+ guiAlgorithmDirtyRegions == DIRTYREGION_SOLVER_UNION)
+ {
+ if (eglSurfaceAttrib(m_eglDisplay, m_eglSurface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED) != EGL_TRUE)
+ {
+ CEGLUtils::Log(LOGERROR, "failed to set EGL_BUFFER_PRESERVED swap behavior");
+ }
+ }
+}
+
+void CEGLContextUtils::SurfaceAttrib(EGLint attribute, EGLint value)
+{
+ if (eglSurfaceAttrib(m_eglDisplay, m_eglSurface, attribute, value) != EGL_TRUE)
+ {
+ CEGLUtils::Log(LOGERROR, "failed to set EGL_BUFFER_PRESERVED swap behavior");
+ }
+}
+
+bool CEGLContextUtils::CreateSurface(EGLNativeWindowType nativeWindow, EGLint HDRcolorSpace /* = EGL_NONE */)
+{
+ if (m_eglDisplay == EGL_NO_DISPLAY)
+ {
+ throw std::logic_error("Creating a surface requires a display");
+ }
+ if (m_eglSurface != EGL_NO_SURFACE)
+ {
+ throw std::logic_error("Do not call CreateSurface when surface has already been created");
+ }
+
+ CEGLAttributesVec attribs;
+ EGLConfig config = m_eglConfig;
+
+#ifdef EGL_GL_COLORSPACE
+ if (HDRcolorSpace != EGL_NONE)
+ {
+ attribs.Add({{EGL_GL_COLORSPACE, HDRcolorSpace}});
+ config = m_eglHDRConfig;
+ }
+#endif
+
+ m_eglSurface = eglCreateWindowSurface(m_eglDisplay, config, nativeWindow, attribs.Get());
+
+ if (m_eglSurface == EGL_NO_SURFACE)
+ {
+ CEGLUtils::Log(LOGERROR, "failed to create window surface");
+ return false;
+ }
+
+ SurfaceAttrib();
+
+ return true;
+}
+
+bool CEGLContextUtils::CreatePlatformSurface(void* nativeWindow, EGLNativeWindowType nativeWindowLegacy)
+{
+ if (m_eglDisplay == EGL_NO_DISPLAY)
+ {
+ throw std::logic_error("Creating a surface requires a display");
+ }
+ if (m_eglSurface != EGL_NO_SURFACE)
+ {
+ throw std::logic_error("Do not call CreateSurface when surface has already been created");
+ }
+
+#if defined(EGL_EXT_platform_base)
+ if (IsPlatformSupported())
+ {
+ auto createPlatformWindowSurfaceEXT = CEGLUtils::GetRequiredProcAddress<PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC>("eglCreatePlatformWindowSurfaceEXT");
+ m_eglSurface = createPlatformWindowSurfaceEXT(m_eglDisplay, m_eglConfig, nativeWindow, nullptr);
+
+ if (m_eglSurface == EGL_NO_SURFACE)
+ {
+ CEGLUtils::Log(LOGERROR, "failed to create platform window surface");
+ return false;
+ }
+ }
+#endif
+
+ if (m_eglSurface == EGL_NO_SURFACE)
+ {
+ return CreateSurface(nativeWindowLegacy);
+ }
+
+ SurfaceAttrib();
+
+ return true;
+}
+
+void CEGLContextUtils::Destroy()
+{
+ DestroyContext();
+ DestroySurface();
+
+ if (m_eglDisplay != EGL_NO_DISPLAY)
+ {
+ eglTerminate(m_eglDisplay);
+ m_eglDisplay = EGL_NO_DISPLAY;
+ }
+}
+
+void CEGLContextUtils::DestroyContext()
+{
+ if (m_eglContext != EGL_NO_CONTEXT)
+ {
+ eglMakeCurrent(m_eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+ eglDestroyContext(m_eglDisplay, m_eglContext);
+ m_eglContext = EGL_NO_CONTEXT;
+ }
+}
+
+void CEGLContextUtils::DestroySurface()
+{
+ if (m_eglSurface != EGL_NO_SURFACE)
+ {
+ eglMakeCurrent(m_eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+ eglDestroySurface(m_eglDisplay, m_eglSurface);
+ m_eglSurface = EGL_NO_SURFACE;
+ }
+}
+
+
+bool CEGLContextUtils::SetVSync(bool enable)
+{
+ if (m_eglDisplay == EGL_NO_DISPLAY)
+ {
+ return false;
+ }
+
+ return (eglSwapInterval(m_eglDisplay, enable) == EGL_TRUE);
+}
+
+bool CEGLContextUtils::TrySwapBuffers()
+{
+ if (m_eglDisplay == EGL_NO_DISPLAY || m_eglSurface == EGL_NO_SURFACE)
+ {
+ return false;
+ }
+
+ return (eglSwapBuffers(m_eglDisplay, m_eglSurface) == EGL_TRUE);
+}