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      1 /*
      2 * Copyright 2011 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 GLES_V2_CONTEXT_H
     18 #define GLES_V2_CONTEXT_H
     19 
     20 #include <GLcommon/GLDispatch.h>
     21 #include <GLcommon/GLEScontext.h>
     22 #include <GLcommon/objectNameManager.h>
     23 #include <utils/threads.h>
     24 
     25 
     26 
     27 class GLESv2Context : public GLEScontext{
     28 public:
     29     void init();
     30     GLESv2Context();
     31     virtual ~GLESv2Context();
     32     void setupArraysPointers(GLESConversionArrays& fArrs,GLint first,GLsizei count,GLenum type,const GLvoid* indices,bool direct);
     33     int  getMaxTexUnits();
     34 
     35     // This whole att0 thing is about a incompatibility between GLES and OpenGL.
     36     // GLES allows a vertex shader attribute to be in location 0 and have a
     37     // current value, while OpenGL is not very clear about this, which results
     38     // in each implementation doing something different.
     39     void setAttribute0value(float x, float y, float z, float w);
     40     void validateAtt0PreDraw(unsigned int count);
     41     void validateAtt0PostDraw(void);
     42     const float* getAtt0(void) {return m_attribute0value;}
     43 
     44 protected:
     45     bool needConvert(GLESConversionArrays& fArrs,GLint first,GLsizei count,GLenum type,const GLvoid* indices,bool direct,GLESpointer* p,GLenum array_id);
     46 private:
     47     void setupArr(const GLvoid* arr,GLenum arrayType,GLenum dataType,GLint size,GLsizei stride,GLboolean normalized, int pointsIndex = -1);
     48     void initExtensionString();
     49 
     50     float m_attribute0value[4];
     51     GLfloat* m_att0Array;
     52     unsigned int m_att0ArrayLength;
     53     bool m_att0NeedsDisable;
     54 };
     55 
     56 #endif
     57