+++ /dev/null
-/*
- * Test GL_EXT_framebuffer_object
- * Like fbotest2.c but use a texture for the Z buffer / renderbuffer.
- * Note: the Z texture is never resized so that limits what can be
- * rendered if the window is resized.
- *
- * This tests a bug reported by Christoph Bumiller on 1 Feb 2010
- * on mesa3d-dev.
- *
- * XXX this should be made into a piglit test.
- *
- * Brian Paul
- * 1 Feb 2010
- */
-
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-
-static int Win = 0;
-static int Width = 400, Height = 400;
-static GLuint Tex = 0;
-static GLuint MyFB, ColorRb, DepthRb;
-static GLboolean Animate = GL_FALSE;
-static GLfloat Rotation = 0.0;
-
-
-static void
-CheckError(int line)
-{
- GLenum err = glGetError();
- if (err) {
- printf("fbotest3: GL Error 0x%x at line %d\n", (int) err, line);
- }
-}
-
-
-static void
-Display( void )
-{
- GLubyte *buffer = malloc(Width * Height * 4);
- GLenum status;
-
- CheckError(__LINE__);
-
- /* draw to user framebuffer */
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB);
- glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
- glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
-
- status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
- if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
- printf("fbotest3: Error: Framebuffer is incomplete!!!\n");
- }
-
- CheckError(__LINE__);
-
- glClearColor(0.5, 0.5, 1.0, 0.0);
- glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
-
- glEnable(GL_DEPTH_TEST);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
-
- glPushMatrix();
- glRotatef(30.0, 1, 0, 0);
- glRotatef(Rotation, 0, 1, 0);
- glutSolidTeapot(2.0);
- glPopMatrix();
-
- /* read from user framebuffer */
- glReadPixels(0, 0, Width, Height, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
-
- /* draw to window */
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- glDisable(GL_DEPTH_TEST); /* in case window has depth buffer */
- glWindowPos2iARB(0, 0);
- glDrawPixels(Width, Height, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
-
- free(buffer);
- glutSwapBuffers();
- CheckError(__LINE__);
-}
-
-
-static void
-Reshape( int width, int height )
-{
- float ar = (float) width / (float) height;
-
- glViewport( 0, 0, width, height );
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glFrustum( -ar, ar, -1.0, 1.0, 5.0, 25.0 );
-
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
- glTranslatef( 0.0, 0.0, -15.0 );
-
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, ColorRb);
- glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB, width, height);
-
- Width = width;
- Height = height;
-}
-
-
-static void
-CleanUp(void)
-{
- glDeleteFramebuffersEXT(1, &MyFB);
- glDeleteRenderbuffersEXT(1, &ColorRb);
- glDeleteRenderbuffersEXT(1, &DepthRb);
- glDeleteTextures(1, &Tex);
- assert(!glIsFramebufferEXT(MyFB));
- assert(!glIsRenderbufferEXT(ColorRb));
- assert(!glIsRenderbufferEXT(DepthRb));
- glutDestroyWindow(Win);
- exit(0);
-}
-
-
-static void
-Idle(void)
-{
- Rotation = glutGet(GLUT_ELAPSED_TIME) * 0.1;
- glutPostRedisplay();
-}
-
-
-static void
-Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case 'a':
- Animate = !Animate;
- if (Animate)
- glutIdleFunc(Idle);
- else
- glutIdleFunc(NULL);
- break;
- case 27:
- CleanUp();
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void
-Init( void )
-{
- if (!glutExtensionSupported("GL_EXT_framebuffer_object")) {
- printf("fbotest3: GL_EXT_framebuffer_object not found!\n");
- exit(0);
- }
- printf("fbotest3: GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
-
- /* create initial tex obj as an RGBA texture */
- glGenTextures(1, &Tex);
- glBindTexture(GL_TEXTURE_2D, Tex);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0,
- GL_RGBA, GL_UNSIGNED_BYTE, NULL);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
- glEnable(GL_TEXTURE_2D);
-
- /* draw something to make sure the texture is used */
- glBegin(GL_POINTS);
- glVertex2f(0, 0);
- glEnd();
-
- /* done w/ texturing */
- glDisable(GL_TEXTURE_2D);
-
- /* Create my Framebuffer Object */
- glGenFramebuffersEXT(1, &MyFB);
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB);
- assert(glIsFramebufferEXT(MyFB));
-
- /* Setup color renderbuffer */
- glGenRenderbuffersEXT(1, &ColorRb);
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, ColorRb);
- assert(glIsRenderbufferEXT(ColorRb));
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
- GL_RENDERBUFFER_EXT, ColorRb);
- glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB, Width, Height);
-
- /* Setup depth renderbuffer (a texture) */
- glGenRenderbuffersEXT(1, &DepthRb);
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, DepthRb);
- assert(glIsRenderbufferEXT(DepthRb));
- /* replace RGBA texture with Z texture */
- glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, Width, Height, 0,
- GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL);
- glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
- GL_TEXTURE_2D, Tex, 0);
-
- CheckError(__LINE__);
-
- /* restore to default */
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- CheckError(__LINE__);
-}
-
-
-int
-main( int argc, char *argv[] )
-{
- glutInit( &argc, argv );
- glutInitWindowPosition( 0, 0 );
- glutInitWindowSize(Width, Height);
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
- Win = glutCreateWindow(argv[0]);
- glewInit();
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutDisplayFunc( Display );
- if (Animate)
- glutIdleFunc(Idle);
- Init();
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff