kc3-lang/angle/samples/simple_texture_cubemap

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• Author : Stuart Morgan
  Date : 2019-08-14 12:25:12
  Hash : 9d737966
  Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

• SimpleTextureCubemap.cpp

• //
  // Copyright 2014 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_TextureCubemap.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 "texture_utils.h"
  #include "util/geometry_utils.h"
  #include "util/shader_utils.h"
  
  class SimpleTextureCubemapSample : public SampleApplication
  {
    public:
      SimpleTextureCubemapSample(int argc, char **argv)
          : SampleApplication("SimpleTextureCubemap", argc, argv)
      {}
  
      bool initialize() override
      {
          constexpr char kVS[] = R"(attribute vec4 a_position;
  attribute vec3 a_normal;
  varying vec3 v_normal;
  void main()
  {
      gl_Position = a_position;
      v_normal = a_normal;
  })";
  
          constexpr char kFS[] = R"(precision mediump float;
  varying vec3 v_normal;
  uniform samplerCube s_texture;
  void main()
  {
      gl_FragColor = textureCube(s_texture, v_normal);
  })";
  
          mProgram = CompileProgram(kVS, kFS);
          if (!mProgram)
          {
              return false;
          }
  
          // Get the attribute locations
          mPositionLoc = glGetAttribLocation(mProgram, "a_position");
          mNormalLoc   = glGetAttribLocation(mProgram, "a_normal");
  
          // Get the sampler locations
          mSamplerLoc = glGetUniformLocation(mProgram, "s_texture");
  
          // Load the texture
          mTexture = CreateSimpleTextureCubemap();
  
          // Generate the geometry data
          CreateSphereGeometry(128, 0.75f, &mSphere);
  
          glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
          glCullFace(GL_BACK);
          glEnable(GL_CULL_FACE);
  
          return true;
      }
  
      void destroy() override
      {
          glDeleteProgram(mProgram);
          glDeleteTextures(1, &mTexture);
      }
  
      void draw() override
      {
          // Set the viewport
          glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());
  
          // Clear the color buffer
          glClear(GL_COLOR_BUFFER_BIT);
  
          // Use the program object
          glUseProgram(mProgram);
  
          // Load the vertex position
          glVertexAttribPointer(mPositionLoc, 3, GL_FLOAT, GL_FALSE, 0, mSphere.positions.data());
          glEnableVertexAttribArray(mPositionLoc);
  
          // Load the normal
          glVertexAttribPointer(mNormalLoc, 3, GL_FLOAT, GL_FALSE, 0, mSphere.normals.data());
          glEnableVertexAttribArray(mNormalLoc);
  
          // Bind the texture
          glActiveTexture(GL_TEXTURE0);
          glBindTexture(GL_TEXTURE_CUBE_MAP, mTexture);
  
          // Set the texture sampler to texture unit to 0
          glUniform1i(mSamplerLoc, 0);
  
          glDrawElements(GL_TRIANGLES, static_cast<GLsizei>(mSphere.indices.size()),
                         GL_UNSIGNED_SHORT, mSphere.indices.data());
      }
  
    private:
      // Handle to a program object
      GLuint mProgram;
  
      // Attribute locations
      GLint mPositionLoc;
      GLint mNormalLoc;
  
      // Sampler location
      GLint mSamplerLoc;
  
      // Texture handle
      GLuint mTexture;
  
      // Geometry data
      SphereGeometry mSphere;
  };
  
  int main(int argc, char **argv)
  {
      SimpleTextureCubemapSample app(argc, argv);
      return app.run();
  }