+++ /dev/null
-/*
- * Test glTexSubImage mid-way through a frame.
- *
- * The same texture is used for both quads but it gets redefined
- * with glTexSubImage (or glTexImage) after the first quad.
- */
-
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "GL/glew.h"
-#include "GL/glut.h"
-
-static GLuint Window = 0;
-static GLboolean Anim = GL_FALSE;
-static GLfloat Angle = 0.0f;
-
-
-
-static void
-first_texture(void)
-{
- static int width=8, height=8;
- static GLubyte tex1[] = {
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 1, 0, 0, 0,
- 0, 0, 0, 1, 1, 0, 0, 0,
- 0, 0, 0, 0, 1, 0, 0, 0,
- 0, 0, 0, 0, 1, 0, 0, 0,
- 0, 0, 0, 0, 1, 0, 0, 0,
- 0, 0, 0, 1, 1, 1, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0 };
-
- GLubyte tex[64][3];
- GLint i, j;
-
- /* red on white */
- for (i=0;i<height;i++) {
- for (j=0;j<width;j++) {
- int p = i*width+j;
- if (tex1[(height-i-1)*width+j]) {
- tex[p][0] = 255; tex[p][1] = 0; tex[p][2] = 0;
- }
- else {
- tex[p][0] = 255; tex[p][1] = 255; tex[p][2] = 255;
- }
- }
- }
-
- glTexImage2D( GL_TEXTURE_2D, 0, 3, width, height, 0,
- GL_RGB, GL_UNSIGNED_BYTE, tex );
-}
-
-
-static void
-second_texture(void)
-{
- static int width=8, height=8;
-
- static GLubyte tex2[] = {
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 2, 2, 0, 0, 0,
- 0, 0, 2, 0, 0, 2, 0, 0,
- 0, 0, 0, 0, 0, 2, 0, 0,
- 0, 0, 0, 0, 2, 0, 0, 0,
- 0, 0, 0, 2, 0, 0, 0, 0,
- 0, 0, 2, 2, 2, 2, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0 };
-
- GLubyte tex[64][3];
- GLint i, j;
-
- /* green on blue */
- for (i=0;i<height;i++) {
- for (j=0;j<width;j++) {
- int p = i*width+j;
- if (tex2[(height-i-1)*width+j]) {
- 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;
- }
- }
- }
-#if 0
- glTexImage2D( GL_TEXTURE_2D, 0, 3, width, height, 0,
- GL_RGB, GL_UNSIGNED_BYTE, tex );
-#else
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
- GL_RGB, GL_UNSIGNED_BYTE, tex );
-#endif
-}
-
-
-
-static void draw( void )
-{
- glClear( GL_COLOR_BUFFER_BIT );
-
- glColor3f( 1.0, 1.0, 1.0 );
-
- /* draw first polygon */
- glPushMatrix();
- glTranslatef( -1.0, 0.0, 0.0 );
- glRotatef( Angle, 0.0, 0.0, 1.0 );
-
- first_texture();
-
- 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();
-
- /* draw second polygon */
- glPushMatrix();
- glTranslatef( 1.0, 0.0, 0.0 );
- glRotatef( Angle-90.0, 0.0, 1.0, 0.0 );
-
- second_texture();
-
- 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();
-}
-
-
-
-static void idle( void )
-{
- static double t0 = -1.;
- double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
- if (t0 < 0.0)
- t0 = t;
- dt = t - t0;
- t0 = t;
- Angle += 120.0*dt;
- 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':
- Anim = !Anim;
- if (Anim)
- glutIdleFunc( idle );
- else
- glutIdleFunc( NULL );
- break;
- case 27:
- glutDestroyWindow(Window);
- exit(0);
- }
-}
-
-
-
-/* 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 )
-{
- /* Setup texturing */
- glEnable( GL_TEXTURE_2D );
- glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL );
-
-
- glBindTexture( GL_TEXTURE_2D, 0 );
- 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_DEPTH | GLUT_DOUBLE );
-
- Window = glutCreateWindow("Texture Objects");
- glewInit();
- if (!Window) {
- exit(1);
- }
-
- init();
-
- glutReshapeFunc( reshape );
- glutKeyboardFunc( key );
- if (Anim)
- glutIdleFunc( idle );
- glutDisplayFunc( draw );
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff