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-rw-r--r--progs/tests/floattex.c169
1 files changed, 169 insertions, 0 deletions
diff --git a/progs/tests/floattex.c b/progs/tests/floattex.c
new file mode 100644
index 0000000000..2345a49b27
--- /dev/null
+++ b/progs/tests/floattex.c
@@ -0,0 +1,169 @@
+/*
+ * Test floating point textures.
+ * No actual rendering, yet.
+ */
+
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <GL/glut.h>
+
+
+/* XXX - temporary */
+#ifndef GL_ARB_texture_float
+#define GL_ARB_texture_float 1
+#define GL_TEXTURE_RED_TYPE_ARB 0x9000
+#define GL_TEXTURE_GREEN_TYPE_ARB 0x9001
+#define GL_TEXTURE_BLUE_TYPE_ARB 0x9002
+#define GL_TEXTURE_ALPHA_TYPE_ARB 0x9003
+#define GL_TEXTURE_LUMINANCE_TYPE_ARB 0x9004
+#define GL_TEXTURE_INTENSITY_TYPE_ARB 0x9005
+#define GL_TEXTURE_DEPTH_TYPE_ARB 0x9006
+#define GL_UNSIGNED_NORMALIZED_ARB 0x9007
+#define GL_RGBA32F_ARB 0x8814
+#define GL_RGB32F_ARB 0x8815
+#define GL_ALPHA32F_ARB 0x8816
+#define GL_INTENSITY32F_ARB 0x8817
+#define GL_LUMINANCE32F_ARB 0x8818
+#define GL_LUMINANCE_ALPHA32F_ARB 0x8819
+#define GL_RGBA16F_ARB 0x881A
+#define GL_RGB16F_ARB 0x881B
+#define GL_ALPHA16F_ARB 0x881C
+#define GL_INTENSITY16F_ARB 0x881D
+#define GL_LUMINANCE16F_ARB 0x881E
+#define GL_LUMINANCE_ALPHA16F_ARB 0x881F
+#endif
+
+
+static GLboolean
+CheckError( int line )
+{
+ GLenum error = glGetError();
+ if (error) {
+ char *err = (char *) gluErrorString( error );
+ fprintf( stderr, "GL Error: %s at line %d\n", err, line );
+ return GL_TRUE;
+ }
+ return GL_FALSE;
+}
+
+
+static void
+Draw(void)
+{
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glPushMatrix();
+
+ glutSolidCube(2.0);
+
+ 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, -15.0);
+}
+
+
+static void
+Key(unsigned char key, int x, int y)
+{
+ (void) x;
+ (void) y;
+ switch (key) {
+ case 27:
+ exit(0);
+ break;
+ }
+ glutPostRedisplay();
+}
+
+
+
+static void
+Init(void)
+{
+ GLfloat tex[16][16][4];
+ GLfloat tex2[16][16][4];
+ GLint i, j, t;
+
+ if (!glutExtensionSupported("GL_MESAX_texture_float")) {
+ printf("Sorry, this test requires GL_MESAX_texture_float\n");
+ exit(1);
+ }
+
+ for (i = 0; i < 16; i++) {
+ for (j = 0; j < 16; j++) {
+ GLfloat s = i / 15.0;
+ tex[i][j][0] = s;
+ tex[i][j][1] = 2.0 * s;
+ tex[i][j][2] = -3.0 * s;
+ tex[i][j][3] = 4.0 * s;
+ }
+ }
+
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, 16, 16, 0, GL_RGBA,
+ GL_FLOAT, tex);
+ CheckError(__LINE__);
+
+ glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_RED_TYPE_ARB, &t);
+ assert(t == GL_FLOAT);
+ glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_TYPE_ARB, &t);
+ assert(t == GL_FLOAT);
+ glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BLUE_TYPE_ARB, &t);
+ assert(t == GL_FLOAT);
+ glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_TYPE_ARB, &t);
+ assert(t == GL_FLOAT);
+
+ CheckError(__LINE__);
+
+ /* read back the texture and make sure values are correct */
+ glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_FLOAT, tex2);
+ CheckError(__LINE__);
+ for (i = 0; i < 16; i++) {
+ for (j = 0; j < 16; j++) {
+ if (tex[i][j][0] != tex2[i][j][0] ||
+ tex[i][j][1] != tex2[i][j][1] ||
+ tex[i][j][2] != tex2[i][j][2] ||
+ tex[i][j][3] != tex2[i][j][3]) {
+ printf("tex[%d][%d] %g %g %g %g != tex2[%d][%d] %g %g %g %g\n",
+ i, j,
+ tex[i][j][0], tex[i][j][1], tex[i][j][2], tex[i][j][3],
+ i, j,
+ tex2[i][j][0], tex2[i][j][1], tex2[i][j][2], tex2[i][j][3]);
+ }
+ }
+ }
+
+
+}
+
+
+int
+main(int argc, char *argv[])
+{
+ glutInit(&argc, argv);
+ glutInitWindowPosition(0, 0);
+ glutInitWindowSize(400, 400);
+ glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
+ glutCreateWindow(argv[0]);
+ glutReshapeFunc(Reshape);
+ glutKeyboardFunc(Key);
+ glutDisplayFunc(Draw);
+ Init();
+ glutMainLoop();
+ return 0;
+}