texmovie.c
上传用户:xk288cn
上传日期:2007-05-28
资源大小:4876k
文件大小:5k
- #include <math.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <GL/glut.h>
- #include "texture.h"
- #if !defined(GL_VERSION_1_1) && !defined(GL_VERSION_1_2)
- #define glBindTexture glBindTextureEXT
- #endif
- static int the_texture;
- static int texture_count;
- static int shrink = 1;
- void afunc(void) {
- static int state;
- if (state ^= 1)
- glEnable(GL_ALPHA_TEST);
- else
- glDisable(GL_ALPHA_TEST);
- }
- void bfunc(void) {
- static int state;
- if (state ^= 1)
- glEnable(GL_BLEND);
- else
- glDisable(GL_BLEND);
- }
- void sfunc(void) {
- shrink ^= 1;
- }
- void tfunc(void) {
- static int state;
- if (state ^= 1)
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
- else
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
- }
- void fourfunc(void) {
- static int state;
- GLenum wrap;
- int i;
- glMatrixMode(GL_TEXTURE);
- if (state ^= 1) {
- wrap = GL_REPEAT;
- glScalef(4.f, 4.f, 1.f);
- } else {
- wrap = GL_CLAMP;
- glLoadIdentity();
- }
- glMatrixMode(GL_MODELVIEW);
- for(i = 0; i < texture_count; i++) {
- glBindTexture(GL_TEXTURE_2D, i+1);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrap);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap);
- }
- }
- void help(void) {
- printf("Usage: texmovie image0 ... imagenn");
- printf("'h' - helpn");
- printf("'a' - toggle alpha testn");
- printf("'b' - toggle blendn");
- printf("'s' - toggle shrinkn");
- printf("'t' - toggle MODULATE or REPLACEn");
- printf("'4' - toggle repeat by 4n");
- }
- void init(int argc, char *argv[]) {
- unsigned *image;
- int i, width, height, components;
- glEnable(GL_TEXTURE_2D);
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- if (argv[0] == NULL) {
- char name[256];
- for (i = 0; i < 32; i++) {
- sprintf(name, "../data/flame/f%02d", i);
- image = read_texture(name, &width, &height, &components);
- if (image == NULL) {
- fprintf(stderr, "Error: Can't load image file "%s".n", argv[i]);
- exit(EXIT_FAILURE);
- } else {
- printf("%d x %d image loadedn", width, height);
- }
- glBindTexture(GL_TEXTURE_2D, i+1);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
- glTexImage2D(GL_TEXTURE_2D, 0, components, width,
- height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image);
- texture_count++;
- }
- }
- for(i = 0; i < argc; i++) {
- image = read_texture(argv[i], &width, &height, &components);
- if (image == NULL) {
- fprintf(stderr, "Error: Can't load image file "%s".n",
- argv[i]);
- exit(EXIT_FAILURE);
- } else {
- printf("%d x %d image loadedn", width, height);
- }
- glBindTexture(GL_TEXTURE_2D, i+1);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
- glTexImage2D(GL_TEXTURE_2D, 0, components, width,
- height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image);
- texture_count++;
- }
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
- glEnable(GL_TEXTURE_2D);
- glClearColor(.25f, .25f, .25f, .25f);
- glAlphaFunc(GL_GREATER, 0.f);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- }
- void
- animate(void) {
- the_texture++;
- if (the_texture >= texture_count) the_texture = 0;
- glutPostRedisplay();
- }
- void display(void) {
- glClear(GL_COLOR_BUFFER_BIT);
- glBindTexture(GL_TEXTURE_2D, the_texture+1);
- glPushMatrix();
- if (shrink) glScalef(.5f, .5f, 1.f);
- glBegin(GL_POLYGON);
- glTexCoord2f(0.0, 0.0);
- glVertex2f(-1.0, -1.0);
- glTexCoord2f(1.0, 0.0);
- glVertex2f(1.0, -1.0);
- glTexCoord2f(1.0, 1.0);
- glVertex2f(1.0, 1.0);
- glTexCoord2f(0.0, 1.0);
- glVertex2f(-1.0, 1.0);
- glEnd();
- glPopMatrix();
- glutSwapBuffers();
- }
- void reshape(int w, int h) {
- glViewport(0, 0, w, h);
- }
- /* ARGSUSED1 */
- void
- key(unsigned char key, int x, int y) {
- switch(key) {
- case 'a': afunc(); break;
- case 'b': bfunc(); break;
- case 'h': help(); break;
- case 's': sfunc(); break;
- case 't': tfunc(); break;
- case '4': fourfunc(); break;
- case ' 33': exit(EXIT_SUCCESS); break;
- default: break;
- }
- glutPostRedisplay();
- }
- int main(int argc, char** argv) {
- glutInitWindowSize(256, 256);
- glutInit(&argc, argv);
- glutInitDisplayMode(GLUT_RGBA|GLUT_DOUBLE);
- (void)glutCreateWindow(argv[0]);
- init(argc-1, argv+1);
- glutDisplayFunc(display);
- glutKeyboardFunc(key);
- glutReshapeFunc(reshape);
- glutIdleFunc(animate);
- glutMainLoop();
- return 0;
- }