diff options
Diffstat (limited to 'progs/miniglx/texline.c')
| -rw-r--r-- | progs/miniglx/texline.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/progs/miniglx/texline.c b/progs/miniglx/texline.c new file mode 100644 index 000000000..d2a97d287 --- /dev/null +++ b/progs/miniglx/texline.c @@ -0,0 +1,268 @@ +/* $Id: texline.c,v 1.1 2003/08/06 17:47:15 keithw Exp $ */ + +/* + * Test textured lines. + * + * Brian Paul + * September 2000 + */ + + +#include <stdio.h> +#include <stdlib.h> +#include <math.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_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 ) +{ + if (Animate) { + Zrot += DYrot; + glutPostRedisplay(); + } +} + + +static void Display( void ) +{ + GLfloat x, y, s, t; + + glClear( GL_COLOR_BUFFER_BIT ); + + glPushMatrix(); + glRotatef(Xrot, 1.0, 0.0, 0.0); + glRotatef(Yrot, 0.0, 1.0, 0.0); + glRotatef(Zrot, 0.0, 0.0, 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(); + } + + glPopMatrix(); + + glutSwapBuffers(); +} + + +static void Reshape( int width, int height ) +{ + GLfloat ar = (float) width / height; + glViewport( 0, 0, width, height ); + glMatrixMode( GL_PROJECTION ); + glLoadIdentity(); + glFrustum( -ar, ar, -1.0, 1.0, 10.0, 100.0 ); + glMatrixMode( GL_MODELVIEW ); + glLoadIdentity(); + glTranslatef( 0.0, 0.0, -12.0 ); +} + + +static void Key( unsigned char key, int x, int y ) +{ + (void) x; + (void) y; + switch (key) { + case 'a': + 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++; + 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); + 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; + if (Animate) + glutIdleFunc(Idle); + else + glutIdleFunc(NULL); + break; + case 27: + exit(0); + break; + } + printf("LineWidth, PointSize = %f\n", LineWidth); + glutPostRedisplay(); +} + + +static void SpecialKey( int key, int x, int y ) +{ + float 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( int argc, char *argv[] ) +{ + 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)); + } +} + + +int main( int argc, char *argv[] ) +{ + glutInit( &argc, argv ); + glutInitWindowSize( 400, 300 ); + + glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); + + glutCreateWindow(argv[0] ); + + Init(argc, argv); + + glutReshapeFunc( Reshape ); + glutKeyboardFunc( Key ); + glutSpecialFunc( SpecialKey ); + glutDisplayFunc( Display ); + if (Animate) + glutIdleFunc( Idle ); + + glutMainLoop(); + return 0; +} |