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      1 /*
      2  * Copyright 2013 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 
     18 #ifndef SF_GLES20RENDERENGINE_H_
     19 #define SF_GLES20RENDERENGINE_H_
     20 
     21 #include <stdint.h>
     22 #include <sys/types.h>
     23 
     24 #include <GLES2/gl2.h>
     25 #include <Transform.h>
     26 
     27 #include "RenderEngine.h"
     28 #include "ProgramCache.h"
     29 #include "Description.h"
     30 
     31 // ---------------------------------------------------------------------------
     32 namespace android {
     33 // ---------------------------------------------------------------------------
     34 
     35 class String8;
     36 class Mesh;
     37 class Texture;
     38 
     39 class GLES20RenderEngine : public RenderEngine {
     40     GLuint mProtectedTexName;
     41     GLint mMaxViewportDims[2];
     42     GLint mMaxTextureSize;
     43     GLuint mVpWidth;
     44     GLuint mVpHeight;
     45 
     46     struct Group {
     47         GLuint texture;
     48         GLuint fbo;
     49         GLuint width;
     50         GLuint height;
     51         mat4 colorTransform;
     52     };
     53 
     54     Description mState;
     55     Vector<Group> mGroupStack;
     56 
     57     virtual void bindImageAsFramebuffer(EGLImageKHR image,
     58             uint32_t* texName, uint32_t* fbName, uint32_t* status);
     59     virtual void unbindFramebuffer(uint32_t texName, uint32_t fbName);
     60 
     61 public:
     62     GLES20RenderEngine();
     63 
     64 protected:
     65     virtual ~GLES20RenderEngine();
     66 
     67     virtual void dump(String8& result);
     68     virtual void setViewportAndProjection(size_t vpw, size_t vph,
     69             Rect sourceCrop, size_t hwh, bool yswap, Transform::orientation_flags rotation);
     70     virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque, int alpha);
     71     virtual void setupDimLayerBlending(int alpha);
     72     virtual void setupLayerTexturing(const Texture& texture);
     73     virtual void setupLayerBlackedOut();
     74     virtual void setupFillWithColor(float r, float g, float b, float a);
     75     virtual void disableTexturing();
     76     virtual void disableBlending();
     77 
     78     virtual void drawMesh(const Mesh& mesh);
     79 
     80     virtual void beginGroup(const mat4& colorTransform);
     81     virtual void endGroup();
     82 
     83     virtual size_t getMaxTextureSize() const;
     84     virtual size_t getMaxViewportDims() const;
     85 };
     86 
     87 // ---------------------------------------------------------------------------
     88 }; // namespace android
     89 // ---------------------------------------------------------------------------
     90 
     91 #endif /* SF_GLES20RENDERENGINE_H_ */
     92