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      1 /*
      2  * Copyright (C) 2007 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_DISPLAY_HARDWARE_H
     18 #define ANDROID_DISPLAY_HARDWARE_H
     19 
     20 #include <stdlib.h>
     21 
     22 #include <ui/PixelFormat.h>
     23 #include <ui/Region.h>
     24 
     25 #include <GLES/gl.h>
     26 #include <GLES/glext.h>
     27 #include <EGL/egl.h>
     28 #include <EGL/eglext.h>
     29 
     30 #include <pixelflinger/pixelflinger.h>
     31 
     32 #include "GLExtensions.h"
     33 
     34 #include "DisplayHardware/DisplayHardwareBase.h"
     35 
     36 namespace android {
     37 
     38 class FramebufferNativeWindow;
     39 class HWComposer;
     40 
     41 class DisplayHardware : public DisplayHardwareBase
     42 {
     43 public:
     44     enum {
     45         COPY_BITS_EXTENSION         = 0x00000008,
     46         BUFFER_PRESERVED            = 0x00010000,
     47         PARTIAL_UPDATES             = 0x00020000,   // video driver feature
     48         SLOW_CONFIG                 = 0x00040000,   // software
     49         SWAP_RECTANGLE              = 0x00080000,
     50     };
     51 
     52     DisplayHardware(
     53             const sp<SurfaceFlinger>& flinger,
     54             uint32_t displayIndex);
     55 
     56     ~DisplayHardware();
     57 
     58     void releaseScreen() const;
     59     void acquireScreen() const;
     60 
     61     // Flip the front and back buffers if the back buffer is "dirty".  Might
     62     // be instantaneous, might involve copying the frame buffer around.
     63     void flip(const Region& dirty) const;
     64 
     65     float       getDpiX() const;
     66     float       getDpiY() const;
     67     float       getRefreshRate() const;
     68     float       getDensity() const;
     69     int         getWidth() const;
     70     int         getHeight() const;
     71     PixelFormat getFormat() const;
     72     uint32_t    getFlags() const;
     73     void        makeCurrent() const;
     74     uint32_t    getMaxTextureSize() const;
     75     uint32_t    getMaxViewportDims() const;
     76 
     77     uint32_t getPageFlipCount() const;
     78     EGLDisplay getEGLDisplay() const { return mDisplay; }
     79 
     80     void dump(String8& res) const;
     81 
     82     // Hardware Composer
     83     HWComposer& getHwComposer() const;
     84 
     85     status_t compositionComplete() const;
     86 
     87     Rect getBounds() const {
     88         return Rect(mWidth, mHeight);
     89     }
     90     inline Rect bounds() const { return getBounds(); }
     91 
     92     // only for debugging
     93     int getCurrentBufferIndex() const;
     94 
     95 private:
     96     void init(uint32_t displayIndex) __attribute__((noinline));
     97     void fini() __attribute__((noinline));
     98 
     99     sp<SurfaceFlinger> mFlinger;
    100     EGLDisplay      mDisplay;
    101     EGLSurface      mSurface;
    102     EGLContext      mContext;
    103     EGLConfig       mConfig;
    104     float           mDpiX;
    105     float           mDpiY;
    106     float           mRefreshRate;
    107     float           mDensity;
    108     int             mWidth;
    109     int             mHeight;
    110     PixelFormat     mFormat;
    111     uint32_t        mFlags;
    112     mutable uint32_t mPageFlipCount;
    113     GLint           mMaxViewportDims[2];
    114     GLint           mMaxTextureSize;
    115 
    116     HWComposer*     mHwc;
    117 
    118     sp<FramebufferNativeWindow> mNativeWindow;
    119 };
    120 
    121 }; // namespace android
    122 
    123 #endif // ANDROID_DISPLAY_HARDWARE_H
    124