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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_HWUI_EXTENSIONS_H
     18 #define ANDROID_HWUI_EXTENSIONS_H
     19 
     20 #include <utils/SortedVector.h>
     21 #include <utils/String8.h>
     22 
     23 #include <GLES2/gl2.h>
     24 #include <GLES2/gl2ext.h>
     25 
     26 #include "Debug.h"
     27 
     28 namespace android {
     29 namespace uirenderer {
     30 
     31 ///////////////////////////////////////////////////////////////////////////////
     32 // Defines
     33 ///////////////////////////////////////////////////////////////////////////////
     34 
     35 // Debug
     36 #if DEBUG_EXTENSIONS
     37     #define EXT_LOGD(...) ALOGD(__VA_ARGS__)
     38 #else
     39     #define EXT_LOGD(...)
     40 #endif
     41 
     42 ///////////////////////////////////////////////////////////////////////////////
     43 // Classes
     44 ///////////////////////////////////////////////////////////////////////////////
     45 
     46 class Extensions {
     47 public:
     48     Extensions() {
     49         const char* buffer = (const char*) glGetString(GL_EXTENSIONS);
     50         const char* current = buffer;
     51         const char* head = current;
     52         EXT_LOGD("Available GL extensions:");
     53         do {
     54             head = strchr(current, ' ');
     55             String8 s(current, head ? head - current : strlen(current));
     56             if (s.length()) {
     57                 mExtensionList.add(s);
     58                 EXT_LOGD("  %s", s.string());
     59             }
     60             current = head + 1;
     61         } while (head);
     62 
     63         mHasNPot = hasExtension("GL_OES_texture_npot");
     64         mHasFramebufferFetch = hasExtension("GL_NV_shader_framebuffer_fetch");
     65         mHasDiscardFramebuffer = hasExtension("GL_EXT_discard_framebuffer");
     66         mHasDebugMarker = hasExtension("GL_EXT_debug_marker");
     67         mHasDebugLabel = hasExtension("GL_EXT_debug_label");
     68         mHasTiledRendering = hasExtension("GL_QCOM_tiled_rendering");
     69 
     70         mExtensions = strdup(buffer);
     71     }
     72 
     73     ~Extensions() {
     74         free(mExtensions);
     75     }
     76 
     77     inline bool hasNPot() const { return mHasNPot; }
     78     inline bool hasFramebufferFetch() const { return mHasFramebufferFetch; }
     79     inline bool hasDiscardFramebuffer() const { return mHasDiscardFramebuffer; }
     80     inline bool hasDebugMarker() const { return mHasDebugMarker; }
     81     inline bool hasDebugLabel() const { return mHasDebugLabel; }
     82     inline bool hasTiledRendering() const { return mHasTiledRendering; }
     83 
     84     bool hasExtension(const char* extension) const {
     85         const String8 s(extension);
     86         return mExtensionList.indexOf(s) >= 0;
     87     }
     88 
     89     void dump() {
     90         ALOGD("Supported extensions:\n%s", mExtensions);
     91     }
     92 
     93 private:
     94     SortedVector<String8> mExtensionList;
     95 
     96     char* mExtensions;
     97 
     98     bool mHasNPot;
     99     bool mHasFramebufferFetch;
    100     bool mHasDiscardFramebuffer;
    101     bool mHasDebugMarker;
    102     bool mHasDebugLabel;
    103     bool mHasTiledRendering;
    104 }; // class Extensions
    105 
    106 }; // namespace uirenderer
    107 }; // namespace android
    108 
    109 #endif // ANDROID_HWUI_EXTENSIONS_H
    110