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/*
* Copyright (C) 2013 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 "Debug.h"
#include "Extensions.h"
namespace android {
using namespace uirenderer;
ANDROID_SINGLETON_STATIC_INSTANCE(Extensions);
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Defines
///////////////////////////////////////////////////////////////////////////////
// Debug
#if DEBUG_EXTENSIONS
#define EXT_LOGD(...) ALOGD(__VA_ARGS__)
#else
#define EXT_LOGD(...)
#endif
///////////////////////////////////////////////////////////////////////////////
// Constructors
///////////////////////////////////////////////////////////////////////////////
Extensions::Extensions(): Singleton<Extensions>() {
const char* buffer = (const char*) glGetString(GL_EXTENSIONS);
const char* current = buffer;
const char* head = current;
EXT_LOGD("Available GL extensions:");
do {
head = strchr(current, ' ');
String8 s(current, head ? head - current : strlen(current));
if (s.length()) {
mExtensionList.add(s);
EXT_LOGD(" %s", s.string());
}
current = head + 1;
} while (head);
mHasNPot = hasExtension("GL_OES_texture_npot");
mHasFramebufferFetch = hasExtension("GL_NV_shader_framebuffer_fetch");
mHasDiscardFramebuffer = hasExtension("GL_EXT_discard_framebuffer");
mHasDebugMarker = hasExtension("GL_EXT_debug_marker");
mHasDebugLabel = hasExtension("GL_EXT_debug_label");
mHasTiledRendering = hasExtension("GL_QCOM_tiled_rendering");
mHas1BitStencil = hasExtension("GL_OES_stencil1");
mHas4BitStencil = hasExtension("GL_OES_stencil4");
mExtensions = strdup(buffer);
const char* version = (const char*) glGetString(GL_VERSION);
mVersion = strdup(version);
// Section 6.1.5 of the OpenGL ES specification indicates the GL version
// string strictly follows this format:
//
// OpenGL<space>ES<space><version number><space><vendor-specific information>
//
// In addition section 6.1.5 describes the version number thusly:
//
// "The version number is either of the form major number.minor number or
// major number.minor number.release number, where the numbers all have one
// or more digits. The release number and vendor specific information are
// optional."
if (sscanf(version, "OpenGL ES %d.%d", &mVersionMajor, &mVersionMinor) !=2) {
// If we cannot parse the version number, assume OpenGL ES 2.0
mVersionMajor = 2;
mVersionMinor = 0;
}
}
Extensions::~Extensions() {
free(mExtensions);
free(mVersion);
}
///////////////////////////////////////////////////////////////////////////////
// Methods
///////////////////////////////////////////////////////////////////////////////
bool Extensions::hasExtension(const char* extension) const {
const String8 s(extension);
return mExtensionList.indexOf(s) >= 0;
}
void Extensions::dump() const {
ALOGD("%s", mVersion);
ALOGD("Supported extensions:\n%s", mExtensions);
}
}; // namespace uirenderer
}; // namespace android
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