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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "GLExtensions.h"
#include <string>
#include <unordered_set>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
ANDROID_SINGLETON_STATIC_INSTANCE(android::renderengine::gl::GLExtensions)
namespace android {
namespace renderengine {
namespace gl {
namespace {
class ExtensionSet {
public:
ExtensionSet(const char* extensions) {
char const* curr = extensions;
char const* head = curr;
do {
head = strchr(curr, ' ');
size_t len = head ? head - curr : strlen(curr);
if (len > 0) {
mExtensions.emplace(curr, len);
}
curr = head + 1;
} while (head);
}
bool hasExtension(const char* extension) const { return mExtensions.count(extension) > 0; }
private:
std::unordered_set<std::string> mExtensions;
};
} // anonymous namespace
void GLExtensions::initWithGLStrings(GLubyte const* vendor, GLubyte const* renderer,
GLubyte const* version, GLubyte const* extensions) {
mVendor = (char const*)vendor;
mRenderer = (char const*)renderer;
mVersion = (char const*)version;
mExtensions = (char const*)extensions;
ExtensionSet extensionSet(mExtensions.c_str());
if (extensionSet.hasExtension("GL_EXT_protected_textures")) {
mHasProtectedTexture = true;
}
}
char const* GLExtensions::getVendor() const {
return mVendor.string();
}
char const* GLExtensions::getRenderer() const {
return mRenderer.string();
}
char const* GLExtensions::getVersion() const {
return mVersion.string();
}
char const* GLExtensions::getExtensions() const {
return mExtensions.string();
}
void GLExtensions::initWithEGLStrings(char const* eglVersion, char const* eglExtensions) {
mEGLVersion = eglVersion;
mEGLExtensions = eglExtensions;
ExtensionSet extensionSet(eglExtensions);
// EGL_ANDROIDX_no_config_context is an experimental extension with no
// written specification. It will be replaced by something more formal.
// SurfaceFlinger is using it to allow a single EGLContext to render to
// both a 16-bit primary display framebuffer and a 32-bit virtual display
// framebuffer.
//
// EGL_KHR_no_config_context is official extension to allow creating a
// context that works with any surface of a display.
if (extensionSet.hasExtension("EGL_ANDROIDX_no_config_context") ||
extensionSet.hasExtension("EGL_KHR_no_config_context")) {
mHasNoConfigContext = true;
}
if (extensionSet.hasExtension("EGL_ANDROID_native_fence_sync")) {
mHasNativeFenceSync = true;
}
if (extensionSet.hasExtension("EGL_KHR_fence_sync")) {
mHasFenceSync = true;
}
if (extensionSet.hasExtension("EGL_KHR_wait_sync")) {
mHasWaitSync = true;
}
if (extensionSet.hasExtension("EGL_EXT_protected_content")) {
mHasProtectedContent = true;
}
if (extensionSet.hasExtension("EGL_IMG_context_priority")) {
mHasContextPriority = true;
}
if (extensionSet.hasExtension("EGL_KHR_surfaceless_context")) {
mHasSurfacelessContext = true;
}
if (extensionSet.hasExtension("EGL_NV_context_priority_realtime")) {
mHasRealtimePriority = true;
}
}
char const* GLExtensions::getEGLVersion() const {
return mEGLVersion.string();
}
char const* GLExtensions::getEGLExtensions() const {
return mEGLExtensions.string();
}
} // namespace gl
} // namespace renderengine
} // namespace android
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