-/* $Id: texline.c,v 1.1 2000/09/30 18:48:33 brianp Exp $ */
/*
* Test textured lines.
* September 2000
*/
-
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
+#include <GL/glew.h>
#include <GL/glut.h>
#include "../util/readtex.c" /* I know, this is a hack. */
#define TEXTURE_FILE "../images/girl.rgb"
static GLboolean Antialias = GL_FALSE;
-static GLboolean Animate = GL_TRUE;
-static GLboolean Texture = GL_TRUE;
+static GLboolean Animate = GL_FALSE;
+static GLint Texture = 1;
+static GLboolean Stipple = GL_FALSE;
static GLfloat LineWidth = 1.0;
static GLfloat Xrot = -60.0, Yrot = 0.0, Zrot = 0.0;
static GLfloat DYrot = 1.0;
-
+static GLboolean Points = GL_FALSE;
+static GLfloat Scale = 1.0;
static void Idle( void )
{
static void Display( void )
{
- GLfloat x, t;
+ GLfloat x, y, s, t;
glClear( GL_COLOR_BUFFER_BIT );
glRotatef(Xrot, 1.0, 0.0, 0.0);
glRotatef(Yrot, 0.0, 1.0, 0.0);
glRotatef(Zrot, 0.0, 0.0, 1.0);
-
- glColor3f(1, 1, 1);
- glBegin(GL_LINES);
- for (t = 0.0; t <= 1.0; t += 0.0125) {
- x = t * 2.0 - 1.0;
- glTexCoord2f(t, 0.0); glVertex2f(x, -1.0);
- glTexCoord2f(t, 1.0); glVertex2f(x, 1.0);
+ glScalef(Scale, Scale, Scale);
+
+ if (Texture)
+ glColor3f(1, 1, 1);
+
+ if (Points) {
+ glBegin(GL_POINTS);
+ for (t = 0.0; t <= 1.0; t += 0.025) {
+ for (s = 0.0; s <= 1.0; s += 0.025) {
+ x = s * 2.0 - 1.0;
+ y = t * 2.0 - 1.0;
+ if (!Texture)
+ glColor3f(1, 0, 1);
+ glMultiTexCoord2fARB(GL_TEXTURE1_ARB, t, s);
+ glTexCoord2f(s, t);
+ glVertex2f(x, y);
+ }
+ }
+ glEnd();
+ }
+ else {
+ glBegin(GL_LINES);
+ for (t = 0.0; t <= 1.0; t += 0.025) {
+ x = t * 2.0 - 1.0;
+ if (!Texture)
+ glColor3f(1, 0, 1);
+ glTexCoord2f(t, 0.0);
+ glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0.0, t);
+ glVertex2f(x, -1.0);
+ if (!Texture)
+ glColor3f(0, 1, 0);
+ glTexCoord2f(t, 1.0);
+ glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 1.0, t);
+ glVertex2f(x, 1.0);
+ }
+ glEnd();
}
- glEnd();
glPopMatrix();
Antialias = !Antialias;
if (Antialias) {
glEnable(GL_LINE_SMOOTH);
+ glEnable(GL_POINT_SMOOTH);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
else {
glDisable(GL_LINE_SMOOTH);
+ glDisable(GL_POINT_SMOOTH);
glDisable(GL_BLEND);
}
break;
case 't':
- Texture = !Texture;
- if (Texture)
+ Texture++;
+ if (Texture > 2)
+ Texture = 0;
+ if (Texture == 0) {
+ glActiveTextureARB(GL_TEXTURE0_ARB);
+ glDisable(GL_TEXTURE_2D);
+ glActiveTextureARB(GL_TEXTURE1_ARB);
+ glDisable(GL_TEXTURE_2D);
+ }
+ else if (Texture == 1) {
+ glActiveTextureARB(GL_TEXTURE0_ARB);
glEnable(GL_TEXTURE_2D);
- else
+ glActiveTextureARB(GL_TEXTURE1_ARB);
glDisable(GL_TEXTURE_2D);
+ }
+ else {
+ glActiveTextureARB(GL_TEXTURE0_ARB);
+ glEnable(GL_TEXTURE_2D);
+ glActiveTextureARB(GL_TEXTURE1_ARB);
+ glEnable(GL_TEXTURE_2D);
+ }
break;
case 'w':
LineWidth -= 0.25;
if (LineWidth < 0.25)
LineWidth = 0.25;
glLineWidth(LineWidth);
+ glPointSize(LineWidth);
break;
case 'W':
LineWidth += 0.25;
if (LineWidth > 8.0)
LineWidth = 8.0;
glLineWidth(LineWidth);
+ glPointSize(LineWidth);
+ break;
+ case 'p':
+ Points = !Points;
+ break;
+ case 's':
+ Stipple = !Stipple;
+ if (Stipple)
+ glEnable(GL_LINE_STIPPLE);
+ else
+ glDisable(GL_LINE_STIPPLE);
break;
case ' ':
Animate = !Animate;
exit(0);
break;
}
- printf("Width %f\n", LineWidth);
+ printf("LineWidth, PointSize = %f\n", LineWidth);
glutPostRedisplay();
}
static void Init( int argc, char *argv[] )
{
- glEnable(GL_TEXTURE_2D);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
- printf("Error: couldn't load texture image\n");
- exit(1);
+ GLfloat r[2];
+ GLuint u;
+
+ for (u = 0; u < 2; u++) {
+ glActiveTextureARB(GL_TEXTURE0_ARB + u);
+ glBindTexture(GL_TEXTURE_2D, 10+u);
+ if (u == 0)
+ glEnable(GL_TEXTURE_2D);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ if (u == 0)
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+ else
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
+ printf("Error: couldn't load texture image\n");
+ exit(1);
+ }
}
+ glLineStipple(1, 0xff);
+
if (argc > 1 && strcmp(argv[1], "-info")==0) {
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
}
+
+ glGetFloatv(GL_ALIASED_POINT_SIZE_RANGE, r);
+ printf("Non-smooth point size range: %g .. %g\n", r[0], r[1]);
+ glGetFloatv(GL_POINT_SIZE_RANGE, r);
+ printf("Smoothed point size range: %g .. %g\n", r[0], r[1]);
+ glGetFloatv(GL_ALIASED_LINE_WIDTH_RANGE, r);
+ printf("Non-smooth line width range: %g .. %g\n", r[0], r[1]);
+ glGetFloatv(GL_LINE_WIDTH_RANGE, r);
+ printf("Smoothed line width range: %g .. %g\n", r[0], r[1]);
}
int main( int argc, char *argv[] )
{
glutInit( &argc, argv );
+ glutInitWindowPosition(0, 0);
glutInitWindowSize( 400, 300 );
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
glutCreateWindow(argv[0] );
+ glewInit();
Init(argc, argv);
glutKeyboardFunc( Key );
glutSpecialFunc( SpecialKey );
glutDisplayFunc( Display );
- glutIdleFunc( Idle );
+ if (Animate)
+ glutIdleFunc( Idle );
glutMainLoop();
return 0;
projects / mesa.git / blobdiff