+++ /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/glew.h>
-#include <GL/glut.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 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();
-
- glBindProgramARB(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);
-
- glBindProgramARB(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();
- glBindProgramARB(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();
- glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, id);
- glProgramStringARB(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 *) 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");
-
- 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");
- glewInit();
- glutReshapeFunc(Reshape);
- glutKeyboardFunc(Key);
- glutSpecialFunc(SpecialKey);
- glutDisplayFunc(Display);
- glutIdleFunc(Idle);
- Init();
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff