Add simple program to test GL_MESA_texture_array.

2 files changed, 344 insertions, 0 deletions

diff --git a/progs/tests/Makefile b/progs/tests/Makefile
index 9edef74..b506db3 100644
--- a/progs/tests/Makefile
+++ b/progs/tests/Makefile
@@ -23,6 +23,7 @@ SOURCES = \
 	arbvptest3.c \
 	arbvptorus.c \
 	arbvpwarpmesh.c \
+	arraytexture.c \
 	blendminmax.c \
 	blendsquare.c \
 	bufferobj.c \
@@ -117,6 +118,12 @@ getprocaddress: getprocaddress.c getproclist.h
 getproclist.h: $(TOP)/src/mesa/glapi/gl_API.xml getprocaddress.c getprocaddress.py
 	python getprocaddress.py > getproclist.h
 
+arraytexture: arraytexture.o readtex.o
+	$(CC) $(CFLAGS) arraytexture.o readtex.o $(LIBS) -o $@
+
+arraytexture.o: arraytexture.c readtex.h
+	$(CC) -c $(INCLUDES) $(CFLAGS) $(DEFINES) $< -o $@
+
 afsmultiarb: afsmultiarb.o readtex.o
 	$(CC) $(CFLAGS) afsmultiarb.o readtex.o $(LIBS) -o $@
 
diff --git a/progs/tests/arraytexture.c b/progs/tests/arraytexture.c
new file mode 100644
index 0000000..48c622b
--- /dev/null
+++ b/progs/tests/arraytexture.c
@@ -0,0 +1,337 @@
+/*
+ * (C) Copyright IBM Corporation 2007
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/**
+ * \file arraytexture.c
+ *
+ *
+ * \author Ian Romanick <idr@us.ibm.com>
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <GL/glut.h>
+#include <GL/glext.h>
+
+#if !defined(GL_EXT_texture_array) && !defined(GL_MESA_texture_array)
+# error "This demo requires enums for either GL_EXT_texture_array or GL_MESA_texture_array to build."
+#endif
+
+#include "readtex.h"
+
+#define GL_CHECK_ERROR() \
+    do { \
+       GLenum err = glGetError(); \
+       if (err) { \
+          printf("%s:%u: %s (0x%04x)\n", __FILE__, __LINE__, \
+                    gluErrorString(err), err); \
+       } \
+    } while (0)
+
+static const char *const textures[] = {
+   "../images/girl.rgb",
+   "../images/girl2.rgb",
+   "../images/arch.rgb",
+   "../images/s128.rgb",
+
+   "../images/tree3.rgb",
+   "../images/bw.rgb",
+   "../images/reflect.rgb",
+   "../images/wrs_logo.rgb",
+   NULL
+};
+
+static const char frag_prog[] =
+  "!!ARBfp1.0\n"
+  "OPTION MESA_texture_array;\n"
+  "TEX    result.color, fragment.texcoord[0], texture[0], ARRAY2D;\n"
+  "END\n";
+
+static GLfloat Xrot = 0, Yrot = -30, Zrot = 0;
+static GLfloat texZ = 0.0;
+static GLfloat texZ_dir = 0.01;
+static GLint num_layers;
+
+static PFNGLBINDPROGRAMARBPROC bind_program;
+static PFNGLPROGRAMSTRINGARBPROC program_string;
+static PFNGLGENPROGRAMSARBPROC gen_programs;
+
+
+static void
+PrintString(const char *s)
+{
+   while (*s) {
+      glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int) *s);
+      s++;
+   }
+}
+
+
+static void Idle(void)
+{
+   static int lastTime = 0;
+   int t = glutGet(GLUT_ELAPSED_TIME);
+
+   if (lastTime == 0)
+      lastTime = t;
+   else if (t - lastTime < 10)
+      return;
+
+   lastTime = t;
+
+   texZ += texZ_dir;
+   if ((texZ < 0.0) || ((GLint) texZ > num_layers)) {
+      texZ_dir = -texZ_dir;
+   }
+
+   glutPostRedisplay();
+}
+
+
+static void Display(void)
+{
+   char str[100];
+
+   glClear(GL_COLOR_BUFFER_BIT);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-1, 1, -1, 1, -1, 1);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+
+   (*bind_program)(GL_FRAGMENT_PROGRAM_ARB, 0);
+   glColor3f(1,1,1);
+   glRasterPos3f(-0.9, -0.9, 0.0);
+   sprintf(str, "Texture Z coordinate = %4.1f", texZ);
+   PrintString(str);
+
+   (*bind_program)(GL_FRAGMENT_PROGRAM_ARB, 1);
+   GL_CHECK_ERROR();
+   glEnable(GL_TEXTURE_2D_ARRAY_EXT);
+   GL_CHECK_ERROR();
+
+   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, -8.0);
+
+   glPushMatrix();
+   glRotatef(Xrot, 1, 0, 0);
+   glRotatef(Yrot, 0, 1, 0);
+   glRotatef(Zrot, 0, 0, 1);
+
+   glBegin(GL_QUADS);
+   glTexCoord3f(0.0, 0.0, texZ);  glVertex2f(-1.0, -1.0);
+   glTexCoord3f(2.0, 0.0, texZ);  glVertex2f(1.0, -1.0);
+   glTexCoord3f(2.0, 2.0, texZ);  glVertex2f(1.0,  1.0);
+   glTexCoord3f(0.0, 2.0, texZ);  glVertex2f(-1.0,  1.0);
+   glEnd();
+
+   glPopMatrix();
+
+   glDisable(GL_TEXTURE_2D_ARRAY_EXT);
+   GL_CHECK_ERROR();
+   (*bind_program)(GL_FRAGMENT_PROGRAM_ARB, 0);
+   GL_CHECK_ERROR();
+
+   glutSwapBuffers();
+}
+
+
+static void Reshape(int width, int height)
+{
+   glViewport(0, 0, width, height);
+}
+
+
+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)
+{
+   const GLfloat 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 int FindLine(const char *program, int position)
+{
+   int i, line = 1;
+   for (i = 0; i < position; i++) {
+      if (program[i] == '\n')
+          line++;
+   }
+   return line;
+}
+
+
+static void
+compile_fragment_program(GLuint id, const char *prog)
+{
+   int errorPos;
+   int err;
+
+   err = glGetError();
+   (*bind_program)(GL_FRAGMENT_PROGRAM_ARB, id);
+   (*program_string)(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
+                     strlen(prog), (const GLubyte *) prog);
+
+   glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorPos);
+   err = glGetError();
+   if (err != GL_NO_ERROR || errorPos != -1) {
+      int l = FindLine(prog, errorPos);
+
+      printf("Fragment Program Error (err=%d, pos=%d line=%d): %s\n",
+             err, errorPos, l,
+             (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
+      exit(0);
+   }
+}
+
+
+static void require_extension(const char *ext)
+{
+   if (!glutExtensionSupported(ext)) {
+      printf("Sorry, %s not supported by this renderer.\n", ext);
+      exit(1);
+   }
+}
+
+
+static void Init(void)
+{
+   const char *const ver_string = (const char *const) glGetString(GL_VERSION);
+   unsigned i;
+
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+   printf("GL_VERSION = %s\n", ver_string);
+
+   require_extension("GL_ARB_fragment_program");
+   require_extension("GL_MESA_texture_array");
+   require_extension("GL_SGIS_generate_mipmap");
+
+   bind_program = glutGetProcAddress("glBindProgramARB");
+   program_string = glutGetProcAddress("glProgramStringARB");
+   gen_programs = glutGetProcAddress("glGenProgramsARB");
+
+
+   for (num_layers = 0; textures[num_layers] != NULL; num_layers++)
+      /* empty */ ;
+
+   glBindTexture(GL_TEXTURE_2D_ARRAY_EXT, 1);
+   glTexImage3D(GL_TEXTURE_2D_ARRAY_EXT, 0, GL_RGB8,
+                256, 256, num_layers, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
+   GL_CHECK_ERROR();
+
+   glTexParameteri(GL_TEXTURE_2D_ARRAY_EXT, GL_GENERATE_MIPMAP_SGIS, 
+                   GL_TRUE);
+
+   for (i = 0; textures[i] != NULL; i++) {
+      GLint width, height;
+      GLenum format;
+
+      GLubyte *image = LoadRGBImage(textures[i], &width, &height, &format);
+      if (!image) {
+         printf("Error: could not load texture image %s\n", textures[i]);
+         exit(1);
+      }
+
+      /* resize to 256 x 256 */
+      if (width != 256 || height != 256) {
+         GLubyte *newImage = malloc(256 * 256 * 4);
+         gluScaleImage(format, width, height, GL_UNSIGNED_BYTE, image,
+                       256, 256, GL_UNSIGNED_BYTE, newImage);
+         free(image);
+         image = newImage;
+      }
+
+      glTexSubImage3D(GL_TEXTURE_2D_ARRAY_EXT, 0,
+                      0, 0, i, 256, 256, 1,
+                      format, GL_UNSIGNED_BYTE, image);
+      free(image);
+   }
+   GL_CHECK_ERROR();
+
+   glTexParameteri(GL_TEXTURE_2D_ARRAY_EXT, GL_TEXTURE_WRAP_S, GL_REPEAT);
+   glTexParameteri(GL_TEXTURE_2D_ARRAY_EXT, GL_TEXTURE_WRAP_T, GL_REPEAT);
+   glTexParameteri(GL_TEXTURE_2D_ARRAY_EXT, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
+
+   glTexParameteri(GL_TEXTURE_2D_ARRAY_EXT, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+   GL_CHECK_ERROR();
+   glTexParameteri(GL_TEXTURE_2D_ARRAY_EXT, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+   GL_CHECK_ERROR();
+
+   compile_fragment_program(1, frag_prog);
+   GL_CHECK_ERROR();
+}
+
+
+int main(int argc, char *argv[])
+{
+   glutInit(&argc, argv);
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(350, 350);
+   glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+   glutCreateWindow("Array texture test");
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutSpecialFunc(SpecialKey);
+   glutDisplayFunc(Display);
+   glutIdleFunc(Idle);
+   Init();
+   glutMainLoop();
+   return 0;
+}