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109 lines
2.9 KiB
109 lines
2.9 KiB
//
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// Copyright 2018 The ANGLE Project Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// Based on Simple_Texture2D.c from
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// Book: OpenGL(R) ES 2.0 Programming Guide
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// Authors: Aaftab Munshi, Dan Ginsburg, Dave Shreiner
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// ISBN-10: 0321502795
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// ISBN-13: 9780321502797
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// Publisher: Addison-Wesley Professional
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// URLs: http://safari.informit.com/9780321563835
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// http://www.opengles-book.com
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#include "SampleApplication.h"
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#include "texture_utils.h"
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#include "util/shader_utils.h"
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#include "util/test_utils.h"
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#include <GLES/gl.h>
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#include <GLES/glext.h>
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class GLES1DrawTextureSample : public SampleApplication
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{
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public:
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GLES1DrawTextureSample(int argc, char **argv)
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: SampleApplication("GLES1DrawTexture", argc, argv, 1, 0, 1280, 800)
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{}
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bool initialize() override
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{
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// Load the texture
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mTexture = CreateSimpleTexture2D();
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glActiveTexture(GL_TEXTURE0);
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glEnable(GL_TEXTURE_2D);
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glActiveTexture(GL_TEXTURE0);
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, mTexture);
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GLint crop[4] = {0, 0, 2, 2};
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glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());
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return true;
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}
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void destroy() override { glDeleteTextures(1, &mTexture); }
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void draw() override
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{
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glClear(GL_COLOR_BUFFER_BIT);
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GLint windowWidth = getWindow()->getWidth();
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GLint windowHeight = getWindow()->getHeight();
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glDrawTexiOES(mX, mY, 0, mWidth, mHeight);
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glDrawTexiOES(windowWidth - mX, mY, 0, mWidth, mHeight);
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glDrawTexiOES(mX, windowHeight - mY, 0, mWidth, mHeight);
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glDrawTexiOES(windowWidth - mX, windowHeight - mY, 0, mWidth, mHeight);
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mX += mReverseX ? -1 : 1;
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mY += mReverseY ? -1 : 1;
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if (mX + mWidth >= windowWidth)
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mReverseX = true;
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if (mX < 0)
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mReverseX = false;
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if (mY + mHeight >= windowHeight)
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mReverseY = true;
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if (mY < 0)
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mReverseY = false;
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++mWidth;
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++mHeight;
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if (mWidth >= windowWidth)
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mWidth = 0;
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if (mHeight >= windowHeight)
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mHeight = 0;
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angle::Sleep(16);
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}
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private:
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// Texture handle
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GLuint mTexture = 0;
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// Draw texture coordinates and dimensions to loop through
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GLint mX = 0;
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GLint mY = 0;
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GLint mWidth = 0;
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GLint mHeight = 0;
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bool mReverseX = false;
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bool mReverseY = false;
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};
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int main(int argc, char **argv)
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{
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GLES1DrawTextureSample app(argc, argv);
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return app.run();
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}
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