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87 lines
2.4 KiB
87 lines
2.4 KiB
4 months ago
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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/gles_loader_autogen.h"
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#include "util/shader_utils.h"
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class GLES1SimpleTexture2DSample : public SampleApplication
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{
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public:
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GLES1SimpleTexture2DSample(int argc, char **argv)
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: SampleApplication("GLES1SimpleTexture2D", argc, argv, 1, 0)
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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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glEnable(GL_TEXTURE_2D);
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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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GLfloat vertices[] = {
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-0.5f, 0.5f, 0.0f, // Position 0
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0.0f, 0.0f, // TexCoord 0
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-0.5f, -0.5f, 0.0f, // Position 1
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0.0f, 1.0f, // TexCoord 1
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0.5f, -0.5f, 0.0f, // Position 2
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1.0f, 1.0f, // TexCoord 2
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0.5f, 0.5f, 0.0f, // Position 3
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1.0f, 0.0f // TexCoord 3
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};
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GLushort indices[] = {0, 1, 2, 0, 2, 3};
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// Set the viewport
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glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());
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// Clear the color buffer
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glClear(GL_COLOR_BUFFER_BIT);
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// Load the vertex position
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glVertexPointer(3, GL_FLOAT, 5 * sizeof(GLfloat), vertices);
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// Load the texture coordinate
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glTexCoordPointer(2, GL_FLOAT, 5 * sizeof(GLfloat), vertices + 3);
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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// Bind the texture
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, mTexture);
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glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
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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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};
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int main(int argc, char **argv)
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{
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GLES1SimpleTexture2DSample app(argc, argv);
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return app.run();
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}
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