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

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• Hash : 5a65a2b1
  Author :
  Date : 2022-07-06T11:46:17
  

  Fix samples' arguments to SampleApplication
  
  Two new parameters were added in
  https://chromium-review.googlesource.com/c/angle/angle/+/3664916 with
  default values, but not all samples were updated to accomodate them.  As
  a result, many samples passed in the major version for client type and
  thus couldn't run.
  
  This change introduces an enum class for the client type + version to
  make sure such a mistake is impossible.
  
  Bug: angleproject:7360
  Change-Id: I450edee612d08a7b67530b61615f63268fefb200
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3748413
  Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Lingfeng Yang <lfy@google.com>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• samples/gles1/FlatShading.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 Hello_Triangle.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 <algorithm>
  
  #include "util/gles_loader_autogen.h"
  
  class FlatShadingSample : public SampleApplication
  {
    public:
      FlatShadingSample(int argc, char **argv)
          : SampleApplication("FlatShadingSample", argc, argv, ClientType::ES1)
      {}
  
      bool initialize() override
      {
          glClearColor(0.1f, 0.1f, 0.2f, 1.0f);
          mRotDeg = 0.0f;
  
          return true;
      }
  
      void draw() override
      {
          glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  
          GLfloat vertices[] = {
              -0.5f, 0.5f, 0.0f, -0.5f, -0.5f, 0.0f, 0.5f,  -0.5f,
              0.0f,  0.5f, 0.5f, 0.0f,  0.0f,  0.0f, -1.0f,
          };
  
          GLfloat colors[] = {
              1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f,
              1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f, 1.0f,
          };
  
          GLuint indices[] = {
              0, 1, 2, 2, 3, 0,
  
              4, 1, 0, 4, 2, 1, 4, 3, 2, 4, 0, 3,
          };
  
          glEnable(GL_DEPTH_TEST);
  
          glEnableClientState(GL_VERTEX_ARRAY);
          glEnableClientState(GL_COLOR_ARRAY);
          glVertexPointer(3, GL_FLOAT, 0, vertices);
          glColorPointer(4, GL_FLOAT, 0, colors);
  
          for (int i = 0; i < 6; i++)
          {
              for (int j = 0; j < 6; j++)
              {
                  if ((i + j * 6) % 2 == 0)
                  {
                      glShadeModel(GL_FLAT);
                  }
                  else
                  {
                      glShadeModel(GL_SMOOTH);
                  }
  
                  glPushMatrix();
  
                  glTranslatef(-0.7f + i * 0.3f, -0.7f + j * 0.3f, 0.0f);
  
                  glRotatef(mRotDeg + (5.0f * (6.0f * i + j)), 0.0f, 1.0f, 0.0f);
                  glRotatef(20.0f + (10.0f * (6.0f * i + j)), 1.0f, 0.0f, 0.0f);
                  GLfloat scale = 0.2f;
                  glScalef(scale, scale, scale);
                  glDrawElements(GL_TRIANGLES, sizeof(indices) / sizeof(GLuint), GL_UNSIGNED_INT,
                                 indices);
  
                  glPopMatrix();
              }
          }
  
          mRotDeg += 0.1f;
      }
  
    private:
      float mRotDeg = 0.0f;
  };
  
  int main(int argc, char **argv)
  {
      FlatShadingSample app(argc, argv);
      return app.run();
  }
  

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