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Diffstat (limited to 'progs/trivial/tri-fbo.c')
-rw-r--r--progs/trivial/tri-fbo.c203
1 files changed, 0 insertions, 203 deletions
diff --git a/progs/trivial/tri-fbo.c b/progs/trivial/tri-fbo.c
deleted file mode 100644
index 089180f97a..0000000000
--- a/progs/trivial/tri-fbo.c
+++ /dev/null
@@ -1,203 +0,0 @@
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <string.h>
-
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-
-
-static int Width = 400, Height = 400;
-static GLuint MyFB, MyRB;
-
-
-#define CheckError() assert(glGetError() == 0)
-
-GLenum doubleBuffer;
-
-static void Init(void)
-{
- fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
- fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
- fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
- fflush(stderr);
-
-
- if (!glutExtensionSupported("GL_EXT_framebuffer_object")) {
- printf("GL_EXT_framebuffer_object not found!\n");
- exit(0);
- }
-
-
- glGenFramebuffersEXT(1, &MyFB);
- glGenRenderbuffersEXT(1, &MyRB);
-
- {
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB);
-
- glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, MyRB);
-
- glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT1_EXT,
- GL_RENDERBUFFER_EXT, MyRB);
-
- glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB, Width, Height);
-
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- }
-
- glClearColor(0.0, 0.0, 1.0, 0.0);
-}
-
-
-
-static void
-Reshape( int width, int height )
-{
- glViewport( 0, 0, width, height );
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
- glMatrixMode( GL_MODELVIEW );
-
- Width = width;
- Height = height;
- glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGB, Width, Height);
-}
-
-
-static void Key(unsigned char key, int x, int y)
-{
-
- switch (key) {
- case 27:
- exit(1);
- default:
- break;
- }
-
- glutPostRedisplay();
-}
-
-
-
-static void Draw( void )
-{
-
- /* draw to user framebuffer */
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, MyFB);
- glDrawBuffer(GL_COLOR_ATTACHMENT1_EXT);
- glReadBuffer(GL_COLOR_ATTACHMENT1_EXT);
-
- glClearColor(0.5, 0.5, 1.0, 0.0);
- glClear(GL_COLOR_BUFFER_BIT);
- CheckError();
-
- glBegin(GL_TRIANGLES);
- glColor3f(0,0,.7);
- glVertex3f( 0.9, -0.9, -30.0);
- glColor3f(.8,0,0);
- glVertex3f( 0.9, 0.9, -30.0);
- glColor3f(0,.9,0);
- glVertex3f(-0.9, 0.0, -30.0);
- glEnd();
-
-
- {
- GLubyte *buffer = malloc(Width * Height * 4);
-
- /* read from user framebuffer */
- glReadPixels(0, 0, Width-60, Height-60, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
- CheckError();
-
- /* draw to window */
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
- /* Try to clear the window, but will overwrite:
- */
- glClearColor(0.8, 0.8, 0, 0.0);
- glClear(GL_COLOR_BUFFER_BIT);
-
- glWindowPos2iARB(30, 30);
- glDrawPixels(Width-60, Height-60, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
-
-
- free(buffer);
- }
-
- /* Bind normal framebuffer */
- glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
-
- if (1) {
- glBegin(GL_TRIANGLES);
- glColor3f(0,.7,0);
- glVertex3f( 0.5, -0.5, -30.0);
- glColor3f(0,0,.8);
- glVertex3f( 0.5, 0.5, -30.0);
- glColor3f(.9,0,0);
- glVertex3f(-0.5, 0.0, -30.0);
- glEnd();
- }
-
- if (doubleBuffer)
- glutSwapBuffers();
- else
- glFinish();
-
- CheckError();
-}
-
-
-static GLenum Args(int argc, char **argv)
-{
- GLint i;
-
- doubleBuffer = GL_FALSE;
-
- for (i = 1; i < argc; i++) {
- if (strcmp(argv[i], "-sb") == 0) {
- doubleBuffer = GL_FALSE;
- } else if (strcmp(argv[i], "-db") == 0) {
- doubleBuffer = GL_TRUE;
- } else {
- fprintf(stderr, "%s (Bad option).\n", argv[i]);
- return GL_FALSE;
- }
- }
- return GL_TRUE;
-}
-
-
-
-int
-main( int argc, char *argv[] )
-{
- GLenum type;
-
- glutInit(&argc, argv);
-
- if (Args(argc, argv) == GL_FALSE) {
- exit(1);
- }
-
- glutInitWindowPosition(100, 0); glutInitWindowSize( Width, Height );
-
- type = GLUT_RGB;
- type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
- glutInitDisplayMode(type);
-
- if (glutCreateWindow(argv[0]) == GL_FALSE) {
- exit(1);
- }
-
- glewInit();
-
- Init();
-
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutDisplayFunc(Draw);
- glutMainLoop();
- return 0;
-}