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Diffstat (limited to 'progs/redbook/combiner.c')
-rw-r--r-- | progs/redbook/combiner.c | 379 |
1 files changed, 0 insertions, 379 deletions
diff --git a/progs/redbook/combiner.c b/progs/redbook/combiner.c deleted file mode 100644 index 7682e0c0324..00000000000 --- a/progs/redbook/combiner.c +++ /dev/null @@ -1,379 +0,0 @@ -/* - * Copyright (c) 1993-2003, Silicon Graphics, Inc. - * All Rights Reserved - * - * Permission to use, copy, modify, and distribute this software for any - * purpose and without fee is hereby granted, provided that the above - * copyright notice appear in all copies and that both the copyright - * notice and this permission notice appear in supporting documentation, - * and that the name of Silicon Graphics, Inc. not be used in - * advertising or publicity pertaining to distribution of the software - * without specific, written prior permission. - * - * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" AND - * WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, - * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR - * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON - * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, - * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, - * OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, LOSS OF - * PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD - * PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN ADVISED OF - * THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE - * OR PERFORMANCE OF THIS SOFTWARE. - * - * US Government Users Restricted Rights - * Use, duplication, or disclosure by the Government is subject to - * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph - * (c)(1)(ii) of the Rights in Technical Data and Computer Software - * clause at DFARS 252.227-7013 and/or in similar or successor clauses - * in the FAR or the DOD or NASA FAR Supplement. Unpublished - rights - * reserved under the copyright laws of the United States. - * - * Contractor/manufacturer is: - * Silicon Graphics, Inc. - * 1500 Crittenden Lane - * Mountain View, CA 94043 - * United State of America - * - * OpenGL(R) is a registered trademark of Silicon Graphics, Inc. - */ - -/* combiner.c - * This program renders a variety of quads showing different - * effects of texture combiner functions. - * - * The first row renders an untextured polygon (so you can - * compare the fragment colors) and then the 2 textures. - * The second row shows several different combiner functions - * on a single texture: replace, modulate, add, add-signed, - * and subtract. - * The third row shows the interpolate combiner function - * on a single texture with a constant color/alpha value, - * varying the amount of interpolation. - * The fourth row uses multitexturing with two textures - * and different combiner functions. - * The fifth row are some combiner experiments: using the - * scaling factor and reversing the order of subtraction - * for a combination function. - */ -#include <GL/glew.h> -#include <GL/glut.h> -#include <stdlib.h> -#include <stdio.h> - -#define imageWidth 8 -#define imageHeight 8 -/* arrays for two textures */ -static GLubyte image0[imageHeight][imageWidth][4]; -static GLubyte image1[imageHeight][imageWidth][4]; - -static GLuint texName[4]; - -static void makeImages(void) -{ - int i, j, c; - for (i = 0; i < imageHeight; i++) { - for (j = 0; j < imageWidth; j++) { - c = ((i&2)==0)*255; /* horiz b & w stripes */ - image0[i][j][0] = (GLubyte) c; - image0[i][j][1] = (GLubyte) c; - image0[i][j][2] = (GLubyte) c; - image0[i][j][3] = (GLubyte) 255; - c = ((j&4)!=0)*128; /* wider vertical 50% cyan and black stripes */ - image1[i][j][0] = (GLubyte) 0; - image1[i][j][1] = (GLubyte) c; - image1[i][j][2] = (GLubyte) c; - image1[i][j][3] = (GLubyte) 255; - } - } -} - -static void init(void) -{ - glClearColor (0.0, 0.0, 0.0, 0.0); - glShadeModel(GL_SMOOTH); - - makeImages(); - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - - glGenTextures(4, texName); - - glBindTexture(GL_TEXTURE_2D, texName[0]); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, imageWidth, imageHeight, - 0, GL_RGBA, GL_UNSIGNED_BYTE, image0); - - glBindTexture(GL_TEXTURE_2D, texName[1]); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, imageWidth, imageHeight, - 0, GL_RGBA, GL_UNSIGNED_BYTE, image1); - -/* smooth-shaded polygon with multiple texture coordinates */ - glNewList (1, GL_COMPILE); - glBegin(GL_QUADS); - glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 0.0, 0.0); - glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0.0, 0.0); - glColor3f (0.5, 1.0, 0.25); - glVertex3f(0.0, 0.0, 0.0); - glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 0.0, 2.0); - glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0.0, 2.0); - glColor3f (1.0, 1.0, 1.0); - glVertex3f(0.0, 1.0, 0.0); - glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 2.0, 2.0); - glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 2.0, 2.0); - glColor3f (1.0, 1.0, 1.0); - glVertex3f(1.0, 1.0, 0.0); - glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 2.0, 0.0); - glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 2.0, 0.0); - glColor3f (1.0, 0.5, 0.25); - glVertex3f(1.0, 0.0, 0.0); - glEnd(); - glEndList (); -} - -static void display(void) -{ - static GLfloat constColor[4] = {0.0, 0.0, 0.0, 0.0}; /* for use as constant texture color */ - - glClear(GL_COLOR_BUFFER_BIT); - - glDisable(GL_TEXTURE_2D); /* untextured polygon--see the "fragment" colors */ - glPushMatrix(); - glTranslatef(0.0, 5.0, 0.0); - glCallList(1); - glPopMatrix(); - - glEnable(GL_TEXTURE_2D); -/* draw ordinary textured polys; 1 texture unit; combine mode disabled */ - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); - glPushMatrix(); - glBindTexture(GL_TEXTURE_2D, texName[0]); - glTranslatef(1.0, 5.0, 0.0); - glCallList(1); - glPopMatrix(); - - glPushMatrix(); - glBindTexture(GL_TEXTURE_2D, texName[1]); - glTranslatef(2.0, 5.0, 0.0); - glCallList(1); - glPopMatrix(); - -/* different combine modes enabled; 1 texture unit - * defaults are: - * glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE); - * glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR); - * glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB); - * glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR); - */ - glBindTexture(GL_TEXTURE_2D, texName[0]); - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB); - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_REPLACE); - glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE); - glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR); - glPushMatrix(); - glTranslatef(1.0, 4.0, 0.0); - glCallList(1); - glPopMatrix(); - - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE); - glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB); - glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR); - glPushMatrix(); - glTranslatef(2.0, 4.0, 0.0); - glCallList(1); - glPopMatrix(); - - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_ADD); - glPushMatrix(); - glTranslatef(3.0, 4.0, 0.0); - glCallList(1); - glPopMatrix(); - - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_ADD_SIGNED_ARB); - glPushMatrix(); - glTranslatef(4.0, 4.0, 0.0); - glCallList(1); - glPopMatrix(); - - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_SUBTRACT_ARB); - glPushMatrix(); - glTranslatef(5.0, 4.0, 0.0); - glCallList(1); - glPopMatrix(); - -/* interpolate combine with constant color; 1 texture unit - * use different alpha values for constant color - * defaults are: - * glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE); - * glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR); - * glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB); - * glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR); - * glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB); - * glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA); - */ - constColor[3] = 0.2; - glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, constColor); - glBindTexture(GL_TEXTURE_2D, texName[0]); - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB); - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_INTERPOLATE_ARB); - glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE); - glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR); - glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB); - glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR); - glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB); - glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA); - glPushMatrix(); - glTranslatef(1.0, 3.0, 0.0); - glCallList(1); - glPopMatrix(); - - constColor[3] = 0.4; - glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, constColor); - glPushMatrix(); - glTranslatef(2.0, 3.0, 0.0); - glCallList(1); - glPopMatrix(); - - constColor[3] = 0.6; - glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, constColor); - glPushMatrix(); - glTranslatef(3.0, 3.0, 0.0); - glCallList(1); - glPopMatrix(); - - constColor[3] = 0.8; - glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, constColor); - glPushMatrix(); - glTranslatef(4.0, 3.0, 0.0); - glCallList(1); - glPopMatrix(); - -/* combine textures 0 & 1 - * defaults are: - * glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE); - * glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR); - * glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB); - * glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR); - */ - - glActiveTextureARB (GL_TEXTURE0_ARB); - glEnable (GL_TEXTURE_2D); - glBindTexture(GL_TEXTURE_2D, texName[0]); - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); - - glActiveTextureARB (GL_TEXTURE1_ARB); - glEnable (GL_TEXTURE_2D); - glBindTexture(GL_TEXTURE_2D, texName[1]); - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB); - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_REPLACE); - glPushMatrix(); - glTranslatef(1.0, 2.0, 0.0); - glCallList(1); - glPopMatrix(); - - /* try different combiner modes of texture unit 1 */ - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE); - glPushMatrix(); - glTranslatef(2.0, 2.0, 0.0); - glCallList(1); - glPopMatrix(); - - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_ADD); - glPushMatrix(); - glTranslatef(3.0, 2.0, 0.0); - glCallList(1); - glPopMatrix(); - - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_ADD_SIGNED_ARB); - glPushMatrix(); - glTranslatef(4.0, 2.0, 0.0); - glCallList(1); - glPopMatrix(); - - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_SUBTRACT_ARB); - glPushMatrix(); - glTranslatef(5.0, 2.0, 0.0); - glCallList(1); - glPopMatrix(); - -/* some experiments */ - -/* see the effect of RGB_SCALE */ - glTexEnvf(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 2.0); - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_REPLACE); - glPushMatrix(); - glTranslatef(1.0, 1.0, 0.0); - glCallList(1); - glPopMatrix(); - - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE); - glPushMatrix(); - glTranslatef(2.0, 1.0, 0.0); - glCallList(1); - glPopMatrix(); - glTexEnvf(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1.0); - -/* using SOURCE0 and SOURCE1, reverse the order of subtraction Arg1-Arg0 */ - - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB); - glTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_SUBTRACT_ARB); - glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_PREVIOUS_ARB); - glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR); - glTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_TEXTURE); - glTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR); - glPushMatrix(); - glTranslatef(5.0, 1.0, 0.0); - glCallList(1); - glPopMatrix(); - - glActiveTextureARB (GL_TEXTURE1_ARB); /* deactivate multitexturing */ - glDisable (GL_TEXTURE_2D); - glActiveTextureARB (GL_TEXTURE0_ARB); /* activate single texture unit */ - - glFlush(); -} - -static void reshape(int w, int h) -{ - glViewport(0, 0, (GLsizei) w, (GLsizei) h); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - gluOrtho2D(0.0, 7.0, 0.0, 7.0); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); -} - -static void keyboard (unsigned char key, int x, int y) -{ - switch (key) { - case 27: - exit(0); - break; - default: - break; - } -} - -int main(int argc, char** argv) -{ - glutInit(&argc, argv); - glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); - glutInitWindowSize(400, 400); - glutInitWindowPosition(100, 100); - glutCreateWindow(argv[0]); - glewInit(); - init(); - glutDisplayFunc(display); - glutReshapeFunc(reshape); - glutKeyboardFunc(keyboard); - glutMainLoop(); - return 0; -} |