51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
/*
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* Copyright (C) 2015 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 _LIBRENDER_TEXTURERESIZE_H
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#define _LIBRENDER_TEXTURERESIZE_H
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#include <GLES2/gl2.h>
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class TextureResize {
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public:
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TextureResize(GLuint width, GLuint height);
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~TextureResize();
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// Scales the given texture for the current viewport and returns the scaled
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// texture. May return the input if no scaling is required.
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GLuint update(GLuint texture);
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struct Framebuffer {
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GLuint texture;
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GLuint framebuffer;
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GLuint program;
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GLuint aPosition;
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GLuint uTexture;
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};
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private:
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void setupFramebuffers(unsigned int factor);
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void resize(GLuint texture);
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private:
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GLuint mWidth;
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GLuint mHeight;
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unsigned int mFactor;
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Framebuffer mFBWidth;
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Framebuffer mFBHeight;
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GLuint mVertexBuffer;
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};
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#endif
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