+++ /dev/null
-/*
- * Test vertex arrays and multitexture.
- * Press 'a' to toggle vertex arrays on/off.
- * When you run this program you should see a square with four colors:
- *
- * +------+------+
- * |yellow| pink |
- * +------+------+
- * |green | blue |
- * +------+------+
- */
-
-
-#include <assert.h>
-#include <math.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include "GL/glew.h"
-#include "GL/glut.h"
-
-static GLuint Window = 0;
-
-static GLuint TexObj[2];
-static GLfloat Angle = 0.0f;
-static GLboolean UseArrays = 1, Anim = 0;
-
-static GLfloat VertArray[4][2] = {
- {-1.2, -1.2}, {1.2, -1.2}, {1.2, 1.2}, {-1.2, 1.2}
-};
-
-static GLfloat Tex0Array[4][2] = {
- {0, 0}, {1, 0}, {1, 1}, {0, 1}
-};
-
-static GLfloat Tex1Array[4][2] = {
- {0, 0}, {1, 0}, {1, 1}, {0, 1}
-};
-
-
-static void init_arrays(void)
-{
- glVertexPointer(2, GL_FLOAT, 0, VertArray);
- glEnableClientState(GL_VERTEX_ARRAY);
-
- glClientActiveTextureARB(GL_TEXTURE0_ARB);
- glTexCoordPointer(2, GL_FLOAT, 0, Tex0Array);
- glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-
- glClientActiveTextureARB(GL_TEXTURE1_ARB);
- glTexCoordPointer(2, GL_FLOAT, 0, Tex1Array);
- glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-}
-
-
-static void draw( void )
-{
- glClear( GL_COLOR_BUFFER_BIT );
-
- glColor3f( 0.0, 0.0, 0.0 );
-
- /* draw first polygon */
- glPushMatrix();
- glRotatef( Angle, 0.0, 0.0, 1.0 );
-
- if (UseArrays) {
- glDrawArrays(GL_POLYGON, 0, 4);
- }
- else {
- glBegin( GL_POLYGON );
- glTexCoord2f( 0.0, 0.0 );
- glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0.0, 0.0);
- glVertex2f( -1.0, -1.0 );
-
- glTexCoord2f( 1.0, 0.0 );
- glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 1.0, 0.0);
- glVertex2f( 1.0, -1.0 );
-
- glTexCoord2f( 1.0, 1.0 );
- glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 1.0, 1.0);
- glVertex2f( 1.0, 1.0 );
-
- glTexCoord2f( 0.0, 1.0 );
- glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0.0, 1.0);
- glVertex2f( -1.0, 1.0 );
- glEnd();
- }
-
- glPopMatrix();
-
- glutSwapBuffers();
-}
-
-
-
-static void idle( void )
-{
- Angle += 2.0;
- glutPostRedisplay();
-}
-
-
-
-/* change view Angle, exit upon ESC */
-static void key(unsigned char k, int x, int y)
-{
- (void) x;
- (void) y;
- switch (k) {
- case 'a':
- UseArrays = !UseArrays;
- printf("UseArrays: %d\n", UseArrays);
- break;
- case ' ':
- Anim = !Anim;
- if (Anim)
- glutIdleFunc(idle);
- else
- glutIdleFunc(NULL);
- break;
- case 27:
- glDeleteTextures( 2, TexObj );
- glutDestroyWindow(Window);
- exit(0);
- }
- glutPostRedisplay();
-}
-
-
-
-/* new window size or exposure */
-static void reshape( int width, int height )
-{
- glViewport(0, 0, (GLint)width, (GLint)height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- /* glOrtho( -3.0, 3.0, -3.0, 3.0, -10.0, 10.0 );*/
- glFrustum( -2.0, 2.0, -2.0, 2.0, 6.0, 20.0 );
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef( 0.0, 0.0, -8.0 );
-}
-
-
-static void init( void )
-{
- static int width=8, height=8;
- GLubyte tex[64][3];
- GLint i, j;
-
- /* generate texture object IDs */
- glGenTextures( 2, TexObj );
-
- /*
- * setup first texture object
- */
- glActiveTextureARB(GL_TEXTURE0_ARB);
- glEnable( GL_TEXTURE_2D );
- glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD );
-
- glBindTexture( GL_TEXTURE_2D, TexObj[0] );
- assert(glIsTexture(TexObj[0]));
-
- /* red over black */
- for (i=0;i<height;i++) {
- for (j=0;j<width;j++) {
- int p = i*width+j;
- if (i < height / 2) {
- tex[p][0] = 0; tex[p][1] = 0; tex[p][2] = 0;
- }
- else {
- tex[p][0] = 255; tex[p][1] = 0; tex[p][2] = 0;
- }
- }
- }
-
- glTexImage2D( GL_TEXTURE_2D, 0, 3, width, height, 0,
- GL_RGB, GL_UNSIGNED_BYTE, tex );
- 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_WRAP_S, GL_REPEAT );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
-
-
- /*
- * setup second texture object
- */
- glActiveTextureARB(GL_TEXTURE1_ARB);
- glEnable( GL_TEXTURE_2D );
- glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD );
-
- glBindTexture( GL_TEXTURE_2D, TexObj[1] );
- assert(glIsTexture(TexObj[1]));
-
- /* left=green, right = blue */
- for (i=0;i<height;i++) {
- for (j=0;j<width;j++) {
- int p = i*width+j;
- if (j < width / 2) {
- tex[p][0] = 0; tex[p][1] = 255; tex[p][2] = 0;
- }
- else {
- tex[p][0] = 0; tex[p][1] = 0; tex[p][2] = 255;
- }
- }
- }
- glTexImage2D( GL_TEXTURE_2D, 0, 3, width, height, 0,
- GL_RGB, GL_UNSIGNED_BYTE, tex );
- 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_WRAP_S, GL_REPEAT );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
-}
-
-
-
-int main( int argc, char *argv[] )
-{
- glutInit(&argc, argv);
- glutInitWindowPosition(0, 0);
- glutInitWindowSize(300, 300);
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
-
- Window = glutCreateWindow("Texture Objects");
- glewInit();
- if (!Window) {
- exit(1);
- }
-
- init();
- init_arrays();
-
- glutReshapeFunc( reshape );
- glutKeyboardFunc( key );
- if (Anim)
- glutIdleFunc( idle );
- glutDisplayFunc( draw );
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff