+++ /dev/null
-/*
- * GL_ARB_multitexture demo
- *
- * Command line options:
- * -info print GL implementation information
- *
- *
- * Brian Paul November 1998 This program is in the public domain.
- * Modified on 12 Feb 2002 for > 2 texture units.
- */
-
-
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-#include "readtex.h"
-
-#define TEXTURE_1_FILE "../images/girl.rgb"
-#define TEXTURE_2_FILE "../images/reflect.rgb"
-
-#define TEX0 1
-#define TEX7 8
-#define ANIMATE 10
-#define QUIT 100
-
-static GLint T0 = 0;
-static GLint Frames = 0;
-static GLboolean Animate = GL_TRUE;
-static GLint NumUnits = 1;
-static GLboolean TexEnabled[8];
-
-static GLfloat Drift = 0.0;
-static GLfloat Xrot = 20.0, Yrot = 30.0, Zrot = 0.0;
-
-
-static void Idle( void )
-{
- if (Animate) {
- GLint i;
-
- Drift = glutGet(GLUT_ELAPSED_TIME) * 0.001;
-
- for (i = 0; i < NumUnits; i++) {
- glActiveTextureARB(GL_TEXTURE0_ARB + i);
- glMatrixMode(GL_TEXTURE);
- glLoadIdentity();
- if (i == 0) {
- glTranslatef(Drift, 0.0, 0.0);
- glScalef(2, 2, 1);
- }
- else if (i == 1) {
- glTranslatef(0.0, Drift, 0.0);
- }
- else {
- float tx = 0.5, ty = 0.5;
- glTranslatef(tx, ty, 0.0);
- glRotatef(180.0 * Drift, 0, 0, 1);
- glScalef(1.0/i, 1.0/i, 1.0/i);
- glTranslatef(-tx, -ty + i * 0.1, 0.0);
- }
- }
- glMatrixMode(GL_MODELVIEW);
-
- glutPostRedisplay();
- }
-}
-
-
-static void DrawObject(void)
-{
- static const GLfloat tex_coords[] = { 0.0, 0.0, 1.0, 1.0, 0.0 };
- static const GLfloat vtx_coords[] = { -1.0, -1.0, 1.0, 1.0, -1.0 };
- GLint i, j;
-
- if (!TexEnabled[0] && !TexEnabled[1])
- glColor3f(0.1, 0.1, 0.1); /* add onto this */
- else
- glColor3f(1, 1, 1); /* modulate this */
-
- glBegin(GL_QUADS);
- for (j = 0; j < 4; j++ ) {
- for (i = 0; i < NumUnits; i++) {
- if (TexEnabled[i])
- glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i,
- tex_coords[j], tex_coords[j+1]);
- }
- glVertex2f( vtx_coords[j], vtx_coords[j+1] );
- }
- glEnd();
-}
-
-
-static void Display( void )
-{
- 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(5.0, 5.0, 5.0);
- DrawObject();
- glPopMatrix();
-
- glutSwapBuffers();
-
- Frames++;
-
- {
- GLint t = glutGet(GLUT_ELAPSED_TIME);
- if (t - T0 >= 5000) {
- GLfloat seconds = (t - T0) / 1000.0;
- GLfloat fps = Frames / seconds;
- printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
- fflush(stdout);
- T0 = t;
- Frames = 0;
- }
- }
-}
-
-
-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, 10.0, 100.0 );
- /*glOrtho( -6.0, 6.0, -6.0, 6.0, 10.0, 100.0 );*/
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
- glTranslatef( 0.0, 0.0, -70.0 );
-}
-
-
-static void ToggleUnit(int unit)
-{
- TexEnabled[unit] = !TexEnabled[unit];
- glActiveTextureARB(GL_TEXTURE0_ARB + unit);
- if (TexEnabled[unit])
- glEnable(GL_TEXTURE_2D);
- else
- glDisable(GL_TEXTURE_2D);
- printf("Enabled: ");
- for (unit = 0; unit < NumUnits; unit++)
- printf("%d ", (int) TexEnabled[unit]);
- printf("\n");
-}
-
-
-static void ModeMenu(int entry)
-{
- if (entry >= TEX0 && entry <= TEX7) {
- /* toggle */
- GLint i = entry - TEX0;
- ToggleUnit(i);
- }
- else if (entry==ANIMATE) {
- Animate = !Animate;
- if (Animate)
- glutIdleFunc(Idle);
- else
- glutIdleFunc(NULL);
- }
- else if (entry==QUIT) {
- exit(0);
- }
-
- glutPostRedisplay();
-}
-
-
-static void Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case 'a':
- Animate = !Animate;
- break;
- case '0':
- ToggleUnit(0);
- break;
- case '1':
- ToggleUnit(1);
- break;
- case '2':
- ToggleUnit(2);
- break;
- case '3':
- ToggleUnit(3);
- break;
- case '4':
- ToggleUnit(4);
- break;
- case '5':
- ToggleUnit(5);
- break;
- case '6':
- ToggleUnit(6);
- break;
- case '7':
- ToggleUnit(7);
- break;
- case 27:
- exit(0);
- break;
- }
- 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 texObj[8];
- GLint size, i;
-
- const char *exten = (const char *) glGetString(GL_EXTENSIONS);
- if (!strstr(exten, "GL_ARB_multitexture")) {
- printf("Sorry, GL_ARB_multitexture not supported by this renderer.\n");
- exit(1);
- }
-
- glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &NumUnits);
- printf("%d texture units supported\n", NumUnits);
- if (NumUnits > 8)
- NumUnits = 8;
-
- glGetIntegerv(GL_MAX_TEXTURE_SIZE, &size);
- printf("%d x %d max texture size\n", size, size);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-
- for (i = 0; i < NumUnits; i++) {
- if (i < 2)
- TexEnabled[i] = GL_TRUE;
- else
- TexEnabled[i] = GL_FALSE;
- }
-
- /* allocate two texture objects */
- glGenTextures(NumUnits, texObj);
-
- /* setup the texture objects */
- for (i = 0; i < NumUnits; i++) {
-
- glActiveTextureARB(GL_TEXTURE0_ARB + i);
- glBindTexture(GL_TEXTURE_2D, texObj[i]);
-
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-
- if (i == 0) {
- if (!LoadRGBMipmaps(TEXTURE_1_FILE, GL_RGB)) {
- printf("Error: couldn't load texture image\n");
- exit(1);
- }
- }
- else if (i == 1) {
- if (!LoadRGBMipmaps(TEXTURE_2_FILE, GL_RGB)) {
- printf("Error: couldn't load texture image\n");
- exit(1);
- }
- }
- else {
- /* checker */
- GLubyte image[8][8][3];
- GLint i, j;
- for (i = 0; i < 8; i++) {
- for (j = 0; j < 8; j++) {
- if ((i + j) & 1) {
- image[i][j][0] = 50;
- image[i][j][1] = 50;
- image[i][j][2] = 50;
- }
- else {
- image[i][j][0] = 25;
- image[i][j][1] = 25;
- image[i][j][2] = 25;
- }
- }
- }
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 8, 8, 0,
- GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *) image);
- }
-
- /* Bind texObj[i] to ith texture unit */
- if (i < 2)
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
- else
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
-
- if (TexEnabled[i])
- glEnable(GL_TEXTURE_2D);
- }
-
- glShadeModel(GL_FLAT);
- glClearColor(0.3, 0.3, 0.4, 1.0);
-
- 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[] )
-{
- GLint i;
-
- glutInitWindowSize( 300, 300 );
- glutInit( &argc, argv );
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
- glutCreateWindow(argv[0] );
- glewInit();
-
- Init( argc, argv );
-
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutSpecialFunc( SpecialKey );
- glutDisplayFunc( Display );
- if (Animate)
- glutIdleFunc(Idle);
-
- glutCreateMenu(ModeMenu);
-
- for (i = 0; i < NumUnits; i++) {
- char s[100];
- sprintf(s, "Toggle Texture %d", i);
- glutAddMenuEntry(s, TEX0 + i);
- }
- glutAddMenuEntry("Toggle Animation", ANIMATE);
- glutAddMenuEntry("Quit", QUIT);
- glutAttachMenu(GLUT_RIGHT_BUTTON);
-
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff