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Diffstat (limited to 'progs/tests/subtex.c')
-rw-r--r-- | progs/tests/subtex.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/progs/tests/subtex.c b/progs/tests/subtex.c deleted file mode 100644 index 86b737c01fa..00000000000 --- a/progs/tests/subtex.c +++ /dev/null @@ -1,225 +0,0 @@ -/* - * 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; -} |