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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.
*/
#ifndef ANDROID_HWUI_EXTENSIONS_H
#define ANDROID_HWUI_EXTENSIONS_H
#include <utils/SortedVector.h>
#include <utils/String8.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include "Debug.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Defines
///////////////////////////////////////////////////////////////////////////////
// Debug
#if DEBUG_EXTENSIONS
#define EXT_LOGD(...) ALOGD(__VA_ARGS__)
#else
#define EXT_LOGD(...)
#endif
// Vendor strings
#define VENDOR_IMG "Imagination Technologies"
///////////////////////////////////////////////////////////////////////////////
// Classes
///////////////////////////////////////////////////////////////////////////////
class Extensions {
public:
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");
const char* vendor = (const char*) glGetString(GL_VENDOR);
EXT_LOGD("Vendor: %s", vendor);
mNeedsHighpTexCoords = strcmp(vendor, VENDOR_IMG) == 0;
// We don't need to copy the string, the OpenGL ES spec
// guarantees the result of glGetString to point to a
// static string as long as our OpenGL context is valid
mExtensions = buffer;
}
inline bool hasNPot() const { return mHasNPot; }
inline bool hasFramebufferFetch() const { return mHasFramebufferFetch; }
inline bool needsHighpTexCoords() const { return mNeedsHighpTexCoords; }
inline bool hasDiscardFramebuffer() const { return mHasDiscardFramebuffer; }
inline bool hasDebugMarker() const { return mHasDebugMarker; }
inline bool hasDebugLabel() const { return mHasDebugLabel; }
bool hasExtension(const char* extension) const {
const String8 s(extension);
return mExtensionList.indexOf(s) >= 0;
}
void dump() {
ALOGD("Supported extensions:\n%s", mExtensions);
}
private:
SortedVector<String8> mExtensionList;
const char* mExtensions;
bool mHasNPot;
bool mNeedsHighpTexCoords;
bool mHasFramebufferFetch;
bool mHasDiscardFramebuffer;
bool mHasDebugMarker;
bool mHasDebugLabel;
}; // class Extensions
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_EXTENSIONS_H
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