95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
/*
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* Copyright 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SCREENRECORD_PROGRAM_H
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#define SCREENRECORD_PROGRAM_H
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#include <utils/Errors.h>
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#include <EGL/egl.h>
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#include <GLES2/gl2.h>
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namespace android {
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/*
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* Utility class for GLES rendering.
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*
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* Not thread-safe.
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*/
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class Program {
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public:
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enum ProgramType { PROGRAM_UNKNOWN=0, PROGRAM_EXTERNAL_TEXTURE,
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PROGRAM_TEXTURE_2D };
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Program() :
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mProgramType(PROGRAM_UNKNOWN),
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mProgram(0),
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maPositionLoc(0),
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maTextureCoordLoc(0),
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muMVPMatrixLoc(0),
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muGLCMatrixLoc(0),
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muTextureLoc(0)
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{}
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~Program() { release(); }
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// Initialize the program for use with the specified texture type.
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status_t setup(ProgramType type);
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// Release the program and associated resources.
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void release();
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// Blit the specified texture to { x, y, x+w, y+h }. Inverts the
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// content if "invert" is set.
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status_t blit(GLuint texName, const float* texMatrix,
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int32_t x, int32_t y, int32_t w, int32_t h,
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bool invert = false) const;
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// Draw a number of triangles.
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status_t drawTriangles(GLuint texName, const float* texMatrix,
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const float* vertices, const float* texes, size_t count) const;
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static const float kIdentity[];
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private:
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Program(const Program&);
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Program& operator=(const Program&);
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// Common code for draw functions.
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status_t beforeDraw(GLuint texName, const float* texMatrix,
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const float* vertices, const float* texes, bool invert) const;
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status_t afterDraw() const;
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// GLES 2 shader utilities.
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status_t createProgram(GLuint* outPgm, const char* vertexShader,
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const char* fragmentShader);
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static status_t compileShader(GLenum shaderType, const char* src,
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GLuint* outShader);
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static status_t linkShaderProgram(GLuint vs, GLuint fs, GLuint* outPgm);
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ProgramType mProgramType;
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GLuint mProgram;
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GLint maPositionLoc;
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GLint maTextureCoordLoc;
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GLint muMVPMatrixLoc;
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GLint muGLCMatrixLoc;
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GLint muTextureLoc;
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};
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}; // namespace android
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#endif /*SCREENRECORD_PROGRAM_H*/
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