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authorBrian Paul <brian.paul@tungstengraphics.com>2003-07-03 03:10:50 +0000
committerBrian Paul <brian.paul@tungstengraphics.com>2003-07-03 03:10:50 +0000
commit7568561fa736c86d1ec8e669899fa02626d0877e (patch)
tree9c7c02fe3cc8493935d30784296fc05a07178d11 /progs
parent235c150f0a369a1d4f70f88a2864ce84e1e95cfa (diff)
GL_ARB_texture_non_power_of_two test program
Diffstat (limited to 'progs')
-rw-r--r--progs/tests/arbnpot.c174
1 files changed, 174 insertions, 0 deletions
diff --git a/progs/tests/arbnpot.c b/progs/tests/arbnpot.c
new file mode 100644
index 0000000000..ad1376885b
--- /dev/null
+++ b/progs/tests/arbnpot.c
@@ -0,0 +1,174 @@
+/*
+ * Test NPOT textures with the GL_ARB_texture_non_power_of_two extension.
+ * Brian Paul
+ * 2 July 2003
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+#include "../util/readtex.c"
+
+#define IMAGE_FILE "../images/girl.rgb"
+
+static GLfloat Zrot = 0;
+
+static void Display( void )
+{
+ glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+ glPushMatrix();
+ glRotatef(Zrot, 0, 0, 1);
+ glBegin(GL_POLYGON);
+ glTexCoord2f(0, 0);
+ glVertex2f(-1, -1);
+ glTexCoord2f(1, 0);
+ glVertex2f(1, -1);
+ glTexCoord2f(1, 1);
+ glVertex2f(1, 1);
+ glTexCoord2f(0, 1);
+ glVertex2f(-1, 1);
+ glEnd();
+ 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, 25.0 );
+ glMatrixMode( GL_MODELVIEW );
+ glLoadIdentity();
+ glTranslatef( 0.0, 0.0, -7.0 );
+}
+
+
+static void Key( unsigned char key, int x, int y )
+{
+ (void) x;
+ (void) y;
+ switch (key) {
+ case 'z':
+ Zrot -= 1.0;
+ break;
+ case 'Z':
+ Zrot += 1.0;
+ break;
+ case 27:
+ exit(0);
+ break;
+ }
+ glutPostRedisplay();
+}
+
+
+static void Init( void )
+{
+ GLubyte *image;
+ int imgWidth, imgHeight, minDim, w;
+ GLenum imgFormat;
+
+ if (!glutExtensionSupported("GL_ARB_texture_non_power_of_two")) {
+ printf("Sorry, this program requires GL_ARB_texture_non_power_of_two\n");
+ exit(1);
+ }
+
+#if 1
+ image = LoadRGBImage( IMAGE_FILE, &imgWidth, &imgHeight, &imgFormat );
+ if (!image) {
+ printf("Couldn't read %s\n", IMAGE_FILE);
+ exit(0);
+ }
+#else
+ int i, j;
+ imgFormat = GL_RGB;
+ imgWidth = 3;
+ imgHeight = 3;
+ image = malloc(imgWidth * imgHeight * 3);
+ for (i = 0; i < imgHeight; i++) {
+ for (j = 0; j < imgWidth; j++) {
+ int k = (i * imgWidth + j) * 3;
+ if ((i + j) & 1) {
+ image[k+0] = 255;
+ image[k+1] = 0;
+ image[k+2] = 0;
+ }
+ else {
+ image[k+0] = 0;
+ image[k+1] = 255;
+ image[k+2] = 0;
+ }
+ }
+ }
+#endif
+
+ printf("Read %d x %d\n", imgWidth, imgHeight);
+
+ minDim = imgWidth < imgHeight ? imgWidth : imgHeight;
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glTexImage1D(GL_TEXTURE_1D, 0, GL_RGB, imgWidth, 0,
+ imgFormat, GL_UNSIGNED_BYTE, image);
+ assert(glGetError() == GL_NO_ERROR);
+
+ glTexImage1D(GL_PROXY_TEXTURE_1D, 0, GL_RGB, imgWidth, 0,
+ imgFormat, GL_UNSIGNED_BYTE, image);
+ glGetTexLevelParameteriv(GL_PROXY_TEXTURE_1D, 0, GL_TEXTURE_WIDTH, &w);
+ assert(w == imgWidth);
+
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, imgWidth, imgHeight, 0,
+ imgFormat, GL_UNSIGNED_BYTE, image);
+ assert(glGetError() == GL_NO_ERROR);
+
+ glTexImage2D(GL_PROXY_TEXTURE_2D, 0, GL_RGB, imgWidth, imgHeight, 0,
+ imgFormat, GL_UNSIGNED_BYTE, image);
+ glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &w);
+ assert(w == imgWidth);
+
+ glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB, imgWidth, imgHeight, 1, 0,
+ imgFormat, GL_UNSIGNED_BYTE, image);
+ assert(glGetError() == GL_NO_ERROR);
+
+ glTexImage3D(GL_PROXY_TEXTURE_3D, 0, GL_RGB, imgWidth, imgHeight, 1, 0,
+ imgFormat, GL_UNSIGNED_BYTE, image);
+ glGetTexLevelParameteriv(GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_WIDTH, &w);
+ assert(w == imgWidth);
+
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, GL_RGB,
+ minDim, minDim, 0,
+ imgFormat, GL_UNSIGNED_BYTE, image);
+ assert(glGetError() == GL_NO_ERROR);
+
+ glTexImage2D(GL_PROXY_TEXTURE_CUBE_MAP, 0, GL_RGB,
+ minDim, minDim, 0,
+ imgFormat, GL_UNSIGNED_BYTE, image);
+ glGetTexLevelParameteriv(GL_PROXY_TEXTURE_CUBE_MAP, 0, GL_TEXTURE_WIDTH, &w);
+ assert(w == minDim);
+
+
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glEnable(GL_TEXTURE_2D);
+}
+
+
+int main( int argc, char *argv[] )
+{
+ glutInit( &argc, argv );
+ glutInitWindowPosition( 0, 0 );
+ glutInitWindowSize( 40, 40 );
+ glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH );
+ glutCreateWindow(argv[0]);
+ glutReshapeFunc( Reshape );
+ glutKeyboardFunc( Key );
+ glutDisplayFunc( Display );
+ Init();
+ glutMainLoop();
+ return 0;
+}