+++ /dev/null
-
-/* GL_NV_texture_rectangle test
- *
- * Brian Paul
- * 14 June 2002
- */
-
-
-#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_0_FILE "../images/girl.rgb"
-#define TEXTURE_1_FILE "../images/reflect.rgb"
-
-#define TEX0 1
-#define TEX7 8
-#define ANIMATE 10
-#define CLAMP 20
-#define CLAMP_TO_EDGE 21
-#define CLAMP_TO_BORDER 22
-#define LINEAR_FILTER 30
-#define NEAREST_FILTER 31
-#define QUIT 100
-
-static GLboolean Animate = GL_FALSE;
-static GLint NumUnits = 2;
-static GLboolean TexEnabled[8];
-static GLint Width[8], Height[8]; /* image sizes */
-static GLenum Format[8];
-
-static GLfloat Xrot = 00.0, Yrot = 00.0, Zrot = 0.0;
-
-
-static void Idle( void )
-{
- Zrot = glutGet(GLUT_ELAPSED_TIME) * 0.01;
- glutPostRedisplay();
-}
-
-
-static void DrawObject(void)
-{
- GLint i;
- GLfloat d = 10; /* so we can see how borders are handled */
-
- glColor3f(.1, .1, .1); /* modulate this */
-
- glPushMatrix();
-
- glRotatef(Zrot, 0, 0, 1);
-
- glBegin(GL_QUADS);
-
- for (i = 0; i < NumUnits; i++)
- glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, -d, -d);
- glVertex2f(-1.0, -1.0);
-
- for (i = 0; i < NumUnits; i++)
- glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, -d);
- glVertex2f(1.0, -1.0);
-
- for (i = 0; i < NumUnits; i++)
- glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, Height[i]+d);
- glVertex2f(1.0, 1.0);
-
- for (i = 0; i < NumUnits; i++)
- glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, -d, Height[i]+d);
- glVertex2f(-1.0, 1.0);
-
- glEnd();
- glPopMatrix();
-}
-
-
-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();
-}
-
-
-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, 100.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
- glTranslatef( 0.0, 0.0, -35.0 );
-}
-
-
-static void ModeMenu(int entry)
-{
- GLint i;
- if (entry >= TEX0 && entry < TEX0 + NumUnits) {
- /* toggle */
- i = entry - TEX0;
- TexEnabled[i] = !TexEnabled[i];
- glActiveTextureARB(GL_TEXTURE0_ARB + i);
- if (TexEnabled[i]) {
- glEnable(GL_TEXTURE_RECTANGLE_NV);
- }
- else {
- glDisable(GL_TEXTURE_RECTANGLE_NV);
- }
- printf("Enabled: ");
- for (i = 0; i < NumUnits; i++)
- printf("%d ", (int) TexEnabled[i]);
- printf("\n");
- }
- else if (entry==ANIMATE) {
- Animate = !Animate;
- if (Animate)
- glutIdleFunc(Idle);
- else
- glutIdleFunc(NULL);
- }
- else if (entry==CLAMP) {
- for (i = 0; i < NumUnits; i++) {
- glActiveTextureARB(GL_TEXTURE0_ARB + i);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_S, GL_CLAMP);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_T, GL_CLAMP);
- }
- }
- else if (entry==CLAMP_TO_EDGE) {
- for (i = 0; i < NumUnits; i++) {
- glActiveTextureARB(GL_TEXTURE0_ARB + i);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
- }
- }
- else if (entry==CLAMP_TO_BORDER) {
- for (i = 0; i < NumUnits; i++) {
- glActiveTextureARB(GL_TEXTURE0_ARB + i);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
- }
- }
- else if (entry==NEAREST_FILTER) {
- for (i = 0; i < NumUnits; i++) {
- glActiveTextureARB(GL_TEXTURE0_ARB + i);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- }
- }
- else if (entry==LINEAR_FILTER) {
- for (i = 0; i < NumUnits; i++) {
- glActiveTextureARB(GL_TEXTURE0_ARB + i);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- }
- }
-
- else if (entry==QUIT) {
- exit(0);
- }
-
- glutPostRedisplay();
-}
-
-
-static void Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case 'z':
- Zrot -= 1.0;
- break;
- case 'Z':
- Zrot += 1.0;
- break;
- case 'a':
- Animate = !Animate;
- if (Animate)
- glutIdleFunc(Idle);
- else
- glutIdleFunc(NULL);
- 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[] )
-{
- const GLenum wrap = GL_CLAMP;
- GLuint texObj[8];
- GLint size, i;
-
- if (!glutExtensionSupported("GL_ARB_multitexture")) {
- printf("Sorry, GL_ARB_multitexture needed by this program\n");
- exit(1);
- }
-
- if (!glutExtensionSupported("GL_NV_texture_rectangle")) {
- printf("Sorry, GL_NV_texture_rectangle needed by this program\n");
- exit(1);
- }
-
- glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &NumUnits);
- printf("%d texture units supported, using 2.\n", NumUnits);
- if (NumUnits > 2)
- NumUnits = 2;
-
- glGetIntegerv(GL_MAX_RECTANGLE_TEXTURE_SIZE_NV, &size);
- printf("%d x %d max texture rectangle size\n", size, size);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-
- for (i = 0; i < NumUnits; i++) {
- TexEnabled[i] = GL_TRUE;
- }
-
- /* 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_RECTANGLE_NV, texObj[i]);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV,
- GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV,
- GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_S, wrap);
- glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_T, wrap);
-
- if (i == 0) {
- GLubyte *img = LoadRGBImage(TEXTURE_0_FILE, &Width[0], &Height[0],
- &Format[0]);
- if (!img) {
- printf("Error: couldn't load texture image\n");
- exit(1);
- }
- printf("Texture %d: %s (%d x %d)\n", i,
- TEXTURE_0_FILE, Width[0], Height[0]);
- glTexImage2D(GL_TEXTURE_RECTANGLE_NV, 0, GL_RGB,
- Width[0], Height[0], 0,
- Format[0], GL_UNSIGNED_BYTE, img);
- }
- else {
- GLubyte *img = LoadRGBImage(TEXTURE_1_FILE, &Width[1], &Height[1],
- &Format[1]);
- if (!img) {
- printf("Error: couldn't load texture image\n");
- exit(1);
- }
- printf("Texture %d: %s (%d x %d)\n", i,
- TEXTURE_1_FILE, Width[1], Height[1]);
- glTexImage2D(GL_TEXTURE_RECTANGLE_NV, 0, GL_RGB,
- Width[1], Height[1], 0,
- Format[1], GL_UNSIGNED_BYTE, img);
- }
-
- if (i < 1)
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
- else
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
-
- if (TexEnabled[i])
- glEnable(GL_TEXTURE_RECTANGLE_NV);
- }
-
- 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;
-
- glutInit( &argc, argv );
- glutInitWindowSize( 300, 300 );
- glutInitWindowPosition( 0, 0 );
- 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("GL_CLAMP", CLAMP);
- glutAddMenuEntry("GL_CLAMP_TO_EDGE", CLAMP_TO_EDGE);
- glutAddMenuEntry("GL_CLAMP_TO_BORDER", CLAMP_TO_BORDER);
- glutAddMenuEntry("GL_NEAREST", NEAREST_FILTER);
- glutAddMenuEntry("GL_LINEAR", LINEAR_FILTER);
- glutAddMenuEntry("Quit", QUIT);
- glutAttachMenu(GLUT_RIGHT_BUTTON);
-
- glutMainLoop();
- return 0;
-}
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