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//
// Copyright 2018 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Based on Simple_Texture2D.c from
// Book: OpenGL(R) ES 2.0 Programming Guide
// Authors: Aaftab Munshi, Dan Ginsburg, Dave Shreiner
// ISBN-10: 0321502795
// ISBN-13: 9780321502797
// Publisher: Addison-Wesley Professional
// URLs: http://safari.informit.com/9780321563835
// http://www.opengles-book.com
#include "SampleApplication.h"
#include "shader_utils.h"
#include "texture_utils.h"
#include <GLES/gl.h>
class GLES1SimpleTexture2DSample : public SampleApplication
{
public:
GLES1SimpleTexture2DSample(EGLint displayType)
: SampleApplication("GLES1SimpleTexture2D", 1280, 720, 1, 0, displayType)
{
}
bool initialize() override
{
// Load the texture
mTexture = CreateSimpleTexture2D();
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glEnable(GL_TEXTURE_2D);
return true;
}
void destroy() override { glDeleteTextures(1, &mTexture); }
void draw() override
{
GLfloat vertices[] = {
-0.5f, 0.5f, 0.0f, // Position 0
0.0f, 0.0f, // TexCoord 0
-0.5f, -0.5f, 0.0f, // Position 1
0.0f, 1.0f, // TexCoord 1
0.5f, -0.5f, 0.0f, // Position 2
1.0f, 1.0f, // TexCoord 2
0.5f, 0.5f, 0.0f, // Position 3
1.0f, 0.0f // TexCoord 3
};
GLushort indices[] = {0, 1, 2, 0, 2, 3};
// Set the viewport
glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());
// Clear the color buffer
glClear(GL_COLOR_BUFFER_BIT);
// Load the vertex position
glVertexPointer(3, GL_FLOAT, 5 * sizeof(GLfloat), vertices);
// Load the texture coordinate
glTexCoordPointer(2, GL_FLOAT, 5 * sizeof(GLfloat), vertices + 3);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
// Bind the texture
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, mTexture);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
}
private:
// Texture handle
GLuint mTexture = 0;
};
int main(int argc, char **argv)
{
EGLint displayType = EGL_PLATFORM_ANGLE_TYPE_DEFAULT_ANGLE;
if (argc > 1)
{
displayType = GetDisplayTypeFromArg(argv[1]);
}
GLES1SimpleTexture2DSample app(displayType);
return app.run();
}
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