Attachment 140 Details for Bug 375 – C equivalent program to validate correctness

C equivalent program to validate correctness

renderbufferblit.c (text/plain), 3.48 KB, created by Sven Gothel on 2009-06-14 18:53:00 CEST

(hide)

Description:

Filename:

MIME Type:

Creator: Sven Gothel

Created: 2009-06-14 18:53:00 CEST

Size: 3.48 KB

patch

obsolete

>// Demonstrate correctness of OpenGL blit
>
>#include <stdio.h>			// Header File For Standard Input / Output
>#include <stdarg.h>			// Header File For Variable Argument Routines
>#include <string.h>			// Header File For String Management
>#include <stdlib.h>
>#include <OpenGL/gl.h>				// Header File For The OpenGL32 Library
>//#include <glu.h>			// Header File For The GLu32 Library
>#include <GLUT/glut.h>			// Header File For The GLUT Library
>#include <math.h>
>
>// Constants -----------------------------------------------------------------
>
>#define kWindowWidth	600
>#define kWindowHeight	600
>
>int ww = kWindowWidth;
>int hh = kWindowHeight;
>
>GLuint fbIds[1] = {0};
>GLuint rbIds[1] = {0};
>
>
>// Function Prototypes -------------------------------------------------------
>
>GLvoid InitGL(GLvoid);
>GLvoid DrawGLScene(GLvoid);
>GLvoid ReSizeGLScene(int Width, int Height);
>
>void glError(int ll) {
>  int errnum = glGetError();
>  if (errnum != 0) {
>    printf("OpenGL Error: %d %x\n", ll, errnum);
>
>    switch (errnum) {
>    case GL_INVALID_ENUM:
>      printf("Invalid Enum\n");
>      break;
>    case GL_INVALID_VALUE:
>      printf("Invalid Value\n");
>      break;
>    default:
>      break;
>    }
>  }
>}
>
>// Main ----------------------------------------------------------------------
>
>int main(int argc, char** argv)
>{
>	
>    glutInit(&argc, argv);
>    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
>    glutInitWindowSize (kWindowWidth, kWindowHeight); 
>    glutInitWindowPosition (100, 100);
>    glutCreateWindow (argv[0]);
>	
>    InitGL();
> 
>    glutDisplayFunc(DrawGLScene); 
>    glutReshapeFunc(ReSizeGLScene); 
>
>    glutMainLoop();
>    
>    return 0;
>}
>
>// Init ----------------------------------------------------------------------
>
>GLvoid InitGL(GLvoid)
>{
>  printf("InitGL\n");
>}
>
>// DrawGLScene ---------------------------------------------------------------
>
>GLvoid DrawGLScene(GLvoid)
>{    
>  printf("DrawGLScene\n");
>
>  glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
>  {
>    glMatrixMode(GL_PROJECTION);
>    glLoadIdentity();
>    glMatrixMode(GL_MODELVIEW);
>    glLoadIdentity();
>    glClearColor(0, 0, 1, 0.5);
>    glClear(GL_COLOR_BUFFER_BIT);
>  }
>
>  glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, fbIds[0]);
>  glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
>
>  glBlitFramebufferEXT(0, 0, ww, hh,
>		       0, 0, ww, hh,
>		       GL_COLOR_BUFFER_BIT,
>		       GL_NEAREST);
>
>  glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
>
>  glFlush();
>  glError(999);
>}
>
>// ReSizeGLScene ------------------------------------------------------------
>
>GLvoid ReSizeGLScene(int Width, int Height)
>{
>  printf("Resize: %d %d\n", Width, Height);
>
>  ww = Width;
>  hh = Height;
>
>  if (fbIds[0] == 0) {
>    // The framebuffer has never been allocated
>    glGenFramebuffersEXT(1, fbIds);
>  }
>
>  if (rbIds[0] != 0) {
>    // Remove the renderbuffer if window has changed size
>    glDeleteRenderbuffersEXT(1, rbIds);
>  }
>
>  glFlush();
>  glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbIds[0]);
>
>  glGenRenderbuffersEXT(1, rbIds);
>  glFlush();
>  glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, rbIds[0]);
>  glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB8, ww, hh);
>  glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, rbIds[0]);
>
>  glFlush();
>  int status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
>  if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
>    printf("Buffer not completed: %d\n", status);
>  }
>
>  glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
>  glClear(GL_COLOR_BUFFER_BIT);
>
>  glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
>  glError(1999);
>}

Actions: View

Attachments on bug 375: 139 | 140