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