summaryrefslogtreecommitdiffstats
path: root/progs/tests/zdrawpix.c
diff options
context:
space:
mode:
Diffstat (limited to 'progs/tests/zdrawpix.c')
-rw-r--r--progs/tests/zdrawpix.c193
1 files changed, 0 insertions, 193 deletions
diff --git a/progs/tests/zdrawpix.c b/progs/tests/zdrawpix.c
deleted file mode 100644
index ba7da571ebf..00000000000
--- a/progs/tests/zdrawpix.c
+++ /dev/null
@@ -1,193 +0,0 @@
-/**
- * Test glDrawPixels(GL_DEPTH_COMPONENT)
- *
- * We load a window-sized buffer of Z values so that Z=1 at the top and
- * Z=0 at the bottom (and interpolate between).
- * We draw that image into the Z buffer, then draw an ordinary cube.
- * The bottom part of the cube should be "clipped" where the cube fails
- * the Z test.
- *
- * Press 'd' to view the Z buffer as a grayscale image.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-#include "../util/showbuffer.c"
-
-
-static int Win;
-static GLfloat Xrot = 50, Yrot = 40, Zpos = 6;
-static GLboolean Anim = GL_FALSE;
-
-static int Width = 200, Height = 200;
-static GLfloat *z;
-static GLboolean showZ = 0;
-
-
-static void
-Idle(void)
-{
- Xrot += 3.0;
- Yrot += 4.0;
- glutPostRedisplay();
-}
-
-
-static void
-Draw(void)
-{
- glClearColor(0, 0, 0.5, 0);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
-#if 1
- glColor3f(1, 0, 0);
- glWindowPos2i(0,0);
- glColorMask(0,0,0,0);
- glDrawPixels(Width, Height, GL_DEPTH_COMPONENT, GL_FLOAT, z);
-#elif 0
- glPushMatrix();
- glTranslatef(-0.75, 0, Zpos);
- glutSolidSphere(1.0, 20, 10);
- glPopMatrix();
-#endif
- glColorMask(1,1,1,1);
-
- /* draw cube */
- glPushMatrix();
- glTranslatef(0, 0, Zpos);
- glRotatef(Xrot, 1, 0, 0);
- glRotatef(Yrot, 0, 1, 0);
- glutSolidCube(2.0);
- glPopMatrix();
-
-#if 0
- /* drawpixels after cube */
- glColor3f(1, 0, 0);
- glWindowPos2i(0,0);
- //glColorMask(0,0,0,0);
- glDrawPixels(Width, Height, GL_DEPTH_COMPONENT, GL_FLOAT, z);
-#endif
-
- if (showZ) {
- ShowDepthBuffer(Width, Height, 0.0, 1.0);
- }
-
- glutSwapBuffers();
-}
-
-
-static void
-Reshape(int width, int height)
-{
- glViewport(0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 30.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(0.0, 0.0, -15.0);
-
- Width = width;
- Height = height;
-
- z = (float *) malloc(width * height * 4);
- {
- int i, j, k = 0;
- for (i = 0; i < height; i++) {
- float zval = (float) i / (height - 1);
- for (j = 0; j < width; j++) {
- z[k++] = zval;
- }
- }
- }
-}
-
-
-static void
-Key(unsigned char key, int x, int y)
-{
- const GLfloat step = 1.0;
- (void) x;
- (void) y;
- switch (key) {
- case 'a':
- Anim = !Anim;
- if (Anim)
- glutIdleFunc(Idle);
- else
- glutIdleFunc(NULL);
- break;
- case 'd':
- showZ = !showZ;
- break;
- case 'z':
- Zpos -= step;
- break;
- case 'Z':
- Zpos += step;
- break;
- case 27:
- glutDestroyWindow(Win);
- exit(0);
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void
-SpecialKey(int key, int x, int y)
-{
- const GLfloat step = 3.0;
- (void) x;
- (void) y;
- switch (key) {
- case GLUT_KEY_UP:
- Xrot -= step;
- break;
- case GLUT_KEY_DOWN:
- Xrot += step;
- break;
- case GLUT_KEY_LEFT:
- Yrot -= step;
- break;
- case GLUT_KEY_RIGHT:
- Yrot += step;
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void
-Init(void)
-{
- /* setup lighting, etc */
- glEnable(GL_DEPTH_TEST);
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
-}
-
-
-int
-main(int argc, char *argv[])
-{
- glutInit(&argc, argv);
- glutInitWindowPosition(0, 0);
- glutInitWindowSize(400, 400);
- glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
- Win = glutCreateWindow(argv[0]);
- glewInit();
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutSpecialFunc(SpecialKey);
- glutDisplayFunc(Draw);
- if (Anim)
- glutIdleFunc(Idle);
- Init();
- glutMainLoop();
- return 0;
-}