kc3-lang/angle/samples/gles1/SimpleTexture2D.cpp

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• Hash : ba319ba3
  Author :
  Date : 2018-12-29T10:29:33
  

  Re-land "Load entry points dynamically in tests and samples."
  
  Fixes the Android/ChromeOS/Fuchsia builds by using consistent EGL
  headers.
  
  This CL adds a dynamic loader generator based on XML files. It also
  refactors the entry point generation script to move the XML parsing
  into a helper class.
  
  Additionally this includes a new GLES 1.0 base header. The new
  header allows for function pointer types and hiding prototypes.
  
  All tests and samples now load ANGLE dynamically. In the future this
  will be extended to load entry points from the driver directly when
  possible. This will allow us to perform more accurate A/B testing.
  
  The new build configuration leads to some tests having more warnings
  applied. The CL includes fixes for the new warnings.
  
  Bug: angleproject:2995
  Change-Id: I5a8772f41a0f89570b3736b785f44b7de1539b57
  Reviewed-on: https://chromium-review.googlesource.com/c/1392382
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• samples/gles1/SimpleTexture2D.cpp

• //
  // 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 "texture_utils.h"
  #include "util/gles_loader_autogen.h"
  #include "util/shader_utils.h"
  
  class GLES1SimpleTexture2DSample : public SampleApplication
  {
    public:
      GLES1SimpleTexture2DSample(int argc, char **argv)
          : SampleApplication("GLES1SimpleTexture2D", argc, argv, 1, 0)
      {}
  
      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)
  {
      GLES1SimpleTexture2DSample app(argc, argv);
      return app.run();
  }
  

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