summaryrefslogtreecommitdiff
path: root/progs/tests
diff options
context:
space:
mode:
authorBrian Paul <brian.paul@tungstengraphics.com>2006-04-14 16:25:27 +0000
committerBrian Paul <brian.paul@tungstengraphics.com>2006-04-14 16:25:27 +0000
commit28bc3cdfbac8b8dda827e1bf03c44d14056a557f (patch)
tree1dd87bdad87be5525f5bfbf4aa6fee962ec3e5ef /progs/tests
parent3adee0829b868ef4e4af44a6c32566068a1ab628 (diff)
another simple FBO test
Diffstat (limited to 'progs/tests')
-rw-r--r--progs/tests/fbotest2.c199
1 files changed, 199 insertions, 0 deletions
diff --git a/progs/tests/fbotest2.c b/progs/tests/fbotest2.c
new file mode 100644
index 0000000000..c3117b0f76
--- /dev/null
+++ b/progs/tests/fbotest2.c
@@ -0,0 +1,199 @@
+/*
+ * Test GL_EXT_framebuffer_object
+ *
+ * Brian Paul
+ * 19 Mar 2006
+ */
+
+
+#define GL_GLEXT_PROTOTYPES
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+static int Width = 400, Height = 400;
+static GLuint MyFB, ColorRb, DepthRb;
+static GLboolean Animate = GL_TRUE;
+static GLfloat Rotation = 0.0;
+
+
+static void
+CheckError(int line)
+{
+ GLenum err = glGetError();
+ if (err) {
+ printf("fbotest2: 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_ATTACHMENT1_EXT);
+ glReadBuffer(GL_COLOR_ATTACHMENT1_EXT);
+
+ status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ printf("fbotest2: 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);
+ 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);
+ glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, DepthRb);
+ glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT,
+ width, height);
+
+ Width = width;
+ Height = height;
+}
+
+
+static void
+CleanUp(void)
+{
+ glDeleteFramebuffersEXT(1, &MyFB);
+ glDeleteRenderbuffersEXT(1, &ColorRb);
+ glDeleteRenderbuffersEXT(1, &DepthRb);
+ assert(!glIsFramebufferEXT(MyFB));
+ assert(!glIsRenderbufferEXT(ColorRb));
+ assert(!glIsRenderbufferEXT(DepthRb));
+ 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("fbotest2: GL_EXT_framebuffer_object not found!\n");
+ exit(0);
+ }
+ printf("fbotest2: GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+
+ glGenFramebuffersEXT(1, &MyFB);
+ glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB);
+ assert(glIsFramebufferEXT(MyFB));
+
+ /* set color buffer */
+ glGenRenderbuffersEXT(1, &ColorRb);
+ glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, ColorRb);
+ assert(glIsRenderbufferEXT(ColorRb));
+ glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT1_EXT,
+ GL_RENDERBUFFER_EXT, ColorRb);
+ glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB, Width, Height);
+
+ /* setup depth buffer */
+ glGenRenderbuffersEXT(1, &DepthRb);
+ glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, DepthRb);
+ assert(glIsRenderbufferEXT(DepthRb));
+ glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
+ GL_RENDERBUFFER_EXT, DepthRb);
+ glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, Width, Height);
+
+ 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 );
+ glutCreateWindow(argv[0]);
+ glutReshapeFunc( Reshape );
+ glutKeyboardFunc( Key );
+ glutDisplayFunc( Display );
+ if (Animate)
+ glutIdleFunc(Idle);
+ Init();
+ glutMainLoop();
+ return 0;
+}