--- /dev/null
+/*
+ * (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;
+}
projects / mesa.git / commitdiff