aboutsummaryrefslogtreecommitdiffstats
path: root/progs/tests/texrect.c
diff options
context:
space:
mode:
Diffstat (limited to 'progs/tests/texrect.c')
-rw-r--r--progs/tests/texrect.c297
1 files changed, 297 insertions, 0 deletions
diff --git a/progs/tests/texrect.c b/progs/tests/texrect.c
new file mode 100644
index 00000000000..1468c73385a
--- /dev/null
+++ b/progs/tests/texrect.c
@@ -0,0 +1,297 @@
+/* $Id: texrect.c,v 1.1 2002/06/15 03:08:19 brianp Exp $ */
+
+/* GL_NV_texture_rectangle test
+ *
+ * Brian Paul
+ * 14 June 2002
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#include "readtex.c" /* I know, this is a hack. */
+
+#define TEXTURE_0_FILE "../images/girl.rgb"
+#define TEXTURE_1_FILE "../images/reflect.rgb"
+
+#define TEX0 1
+#define TEX7 8
+#define ANIMATE 10
+#define QUIT 100
+
+static GLboolean Animate = GL_TRUE;
+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 += 1.0;
+ glutPostRedisplay();
+}
+
+
+static void DrawObject(void)
+{
+ GLint i;
+ GLfloat d = 0; /* set this >0 to test clamping */
+
+ 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, -3);
+ glVertex2f(1.0, -1.0);
+
+ for (i = 0; i < NumUnits; i++)
+ glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, Height[i]+3);
+ 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)
+{
+ if (entry >= TEX0 && entry < TEX0 + NumUnits) {
+ /* toggle */
+ GLint 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==QUIT) {
+ exit(0);
+ }
+
+ glutPostRedisplay();
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+ (void) x;
+ (void) y;
+ switch (key) {
+ 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[] )
+{
+ 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);
+
+ 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] );
+
+ 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("Quit", QUIT);
+ glutAttachMenu(GLUT_RIGHT_BUTTON);
+
+ glutMainLoop();
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 01:33:23 +0000