diff options
author | Eric Anholt <[email protected]> | 2010-05-21 09:32:38 -0700 |
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committer | Eric Anholt <[email protected]> | 2010-05-21 12:20:39 -0700 |
commit | 68fc4b415e322f6744299e39864fbc377c6eff74 (patch) | |
tree | 4bafffd8b0105174f3c5c0ae327a005be9145990 /progs/demos/cubemap.c | |
parent | e4f4489e3fc0b36d72821b55794fb843b2b7fa5f (diff) |
Remove demos that have moved to git+ssh://git.freedesktop.org/git/mesa/demos.
The remaining programs are ones I've had difficulty finding a build
environment for to make the build system or are unit tests that should
probably live next to their code instead. Hopefully people can bring
over the build for remaining pieces they care about.
Diffstat (limited to 'progs/demos/cubemap.c')
-rw-r--r-- | progs/demos/cubemap.c | 631 |
1 files changed, 0 insertions, 631 deletions
diff --git a/progs/demos/cubemap.c b/progs/demos/cubemap.c deleted file mode 100644 index 3e79d6a5589..00000000000 --- a/progs/demos/cubemap.c +++ /dev/null @@ -1,631 +0,0 @@ -/* - * GL_ARB_texture_cube_map demo - * - * Brian Paul - * May 2000 - * - * - * Copyright (C) 2000 Brian Paul 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 - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL 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. - */ - - -/* - * This is a pretty minimalistic demo for now. Eventually, use some - * interesting cube map textures and 3D objects. - * For now, we use 6 checkerboard "walls" and a sphere (good for - * verification purposes). - */ - - -#include <assert.h> -#include <math.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <GL/glew.h> -#include "GL/glut.h" -#include "readtex.h" - -#ifndef GL_TEXTURE_CUBE_MAP_SEAMLESS -#define GL_TEXTURE_CUBE_MAP_SEAMLESS 0x884F -#endif - -static GLfloat Xrot = 0, Yrot = 0; -static GLfloat EyeDist = 10; -static GLboolean use_vertex_arrays = GL_FALSE; -static GLboolean anim = GL_TRUE; -static GLboolean NoClear = GL_FALSE; -static GLint FrameParity = 0; -static GLenum FilterIndex = 0; -static GLint ClampIndex = 0; -static GLboolean supportFBO = GL_FALSE; -static GLboolean supportSeamless = GL_FALSE; -static GLboolean seamless = GL_FALSE; -static GLuint TexObj = 0; -static GLint T0 = 0; -static GLint Frames = 0; - - -static struct { - GLenum mode; - const char *name; -} ClampModes[] = { - { GL_CLAMP_TO_EDGE, "GL_CLAMP_TO_EDGE" }, - { GL_CLAMP_TO_BORDER, "GL_CLAMP_TO_BORDER" }, - { GL_CLAMP, "GL_CLAMP" }, - { GL_REPEAT, "GL_REPEAT" } -}; - -#define NUM_CLAMP_MODES (sizeof(ClampModes) / sizeof(ClampModes[0])) - - -static struct { - GLenum mag_mode, min_mode; - const char *name; -} FilterModes[] = { - { GL_NEAREST, GL_NEAREST, "GL_NEAREST, GL_NEAREST" }, - { GL_NEAREST, GL_LINEAR, "GL_NEAREST, GL_LINEAR" }, - { GL_NEAREST, GL_NEAREST_MIPMAP_NEAREST, "GL_NEAREST, GL_NEAREST_MIPMAP_NEAREST" }, - { GL_NEAREST, GL_NEAREST_MIPMAP_LINEAR, "GL_NEAREST, GL_NEAREST_MIPMAP_LINEAR" }, - { GL_NEAREST, GL_LINEAR_MIPMAP_NEAREST, "GL_NEAREST, GL_LINEAR_MIPMAP_NEAREST" }, - { GL_NEAREST, GL_LINEAR_MIPMAP_LINEAR, "GL_NEAREST, GL_LINEAR_MIPMAP_LINEAR" }, - - { GL_LINEAR, GL_NEAREST, "GL_LINEAR, GL_NEAREST" }, - { GL_LINEAR, GL_LINEAR, "GL_LINEAR, GL_LINEAR" }, - { GL_LINEAR, GL_NEAREST_MIPMAP_NEAREST, "GL_LINEAR, GL_NEAREST_MIPMAP_NEAREST" }, - { GL_LINEAR, GL_NEAREST_MIPMAP_LINEAR, "GL_LINEAR, GL_NEAREST_MIPMAP_LINEAR" }, - { GL_LINEAR, GL_LINEAR_MIPMAP_NEAREST, "GL_LINEAR, GL_LINEAR_MIPMAP_NEAREST" }, - { GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, "GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR" } -}; - -#define NUM_FILTER_MODES (sizeof(FilterModes) / sizeof(FilterModes[0])) - - - -/* The effects of GL_ARB_seamless_cube_map don't show up unless eps1 is 1.0. - */ -#define eps1 1.0 /*0.99*/ -#define br 20.0 /* box radius */ - -static const GLfloat tex_coords[] = { - /* +X side */ - 1.0, -eps1, -eps1, - 1.0, -eps1, eps1, - 1.0, eps1, eps1, - 1.0, eps1, -eps1, - - /* -X side */ - -1.0, eps1, -eps1, - -1.0, eps1, eps1, - -1.0, -eps1, eps1, - -1.0, -eps1, -eps1, - - /* +Y side */ - -eps1, 1.0, -eps1, - -eps1, 1.0, eps1, - eps1, 1.0, eps1, - eps1, 1.0, -eps1, - - /* -Y side */ - -eps1, -1.0, -eps1, - -eps1, -1.0, eps1, - eps1, -1.0, eps1, - eps1, -1.0, -eps1, - - /* +Z side */ - eps1, -eps1, 1.0, - -eps1, -eps1, 1.0, - -eps1, eps1, 1.0, - eps1, eps1, 1.0, - - /* -Z side */ - eps1, eps1, -1.0, - -eps1, eps1, -1.0, - -eps1, -eps1, -1.0, - eps1, -eps1, -1.0, -}; - -static const GLfloat vtx_coords[] = { - /* +X side */ - br, -br, -br, - br, -br, br, - br, br, br, - br, br, -br, - - /* -X side */ - -br, br, -br, - -br, br, br, - -br, -br, br, - -br, -br, -br, - - /* +Y side */ - -br, br, -br, - -br, br, br, - br, br, br, - br, br, -br, - - /* -Y side */ - -br, -br, -br, - -br, -br, br, - br, -br, br, - br, -br, -br, - - /* +Z side */ - br, -br, br, - -br, -br, br, - -br, br, br, - br, br, br, - - /* -Z side */ - br, br, -br, - -br, br, -br, - -br, -br, -br, - br, -br, -br, -}; - -static void draw_skybox( void ) -{ - if ( use_vertex_arrays ) { - glTexCoordPointer( 3, GL_FLOAT, 0, tex_coords ); - glVertexPointer( 3, GL_FLOAT, 0, vtx_coords ); - - glEnableClientState( GL_TEXTURE_COORD_ARRAY ); - glEnableClientState( GL_VERTEX_ARRAY ); - - glDrawArrays( GL_QUADS, 0, 24 ); - - glDisableClientState( GL_TEXTURE_COORD_ARRAY ); - glDisableClientState( GL_VERTEX_ARRAY ); - } - else { - unsigned i; - - glBegin(GL_QUADS); - for ( i = 0 ; i < 24 ; i++ ) { - glTexCoord3fv( & tex_coords[ i * 3 ] ); - glVertex3fv ( & vtx_coords[ i * 3 ] ); - } - glEnd(); - } -} - - -static void draw( void ) -{ - GLenum wrap; - - if (NoClear) { - /* This demonstrates how we can avoid calling glClear. - * This method only works if every pixel in the window is painted for - * every frame. - * We can simply skip clearing of the color buffer in this case. - * For the depth buffer, we alternately use a different subrange of - * the depth buffer for each frame. For the odd frame use the range - * [0, 0.5] with GL_LESS. For the even frames, use the range [1, 0.5] - * with GL_GREATER. - */ - FrameParity = 1 - FrameParity; - if (FrameParity) { - glDepthRange(0.0, 0.5); - glDepthFunc(GL_LESS); - } - else { - glDepthRange(1.0, 0.5); - glDepthFunc(GL_GREATER); - } - } - else { - /* ordinary clearing */ - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - } - - glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER, - FilterModes[FilterIndex].min_mode); - glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER, - FilterModes[FilterIndex].mag_mode); - - if (supportSeamless) { - if (seamless) { - glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS); - } else { - glDisable(GL_TEXTURE_CUBE_MAP_SEAMLESS); - } - } - wrap = ClampModes[ClampIndex].mode; - glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_S, wrap); - glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_T, wrap); - glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_R, wrap); - - glPushMatrix(); /*MODELVIEW*/ - glTranslatef( 0.0, 0.0, -EyeDist ); - - /* skybox */ - glDisable(GL_TEXTURE_GEN_S); - glDisable(GL_TEXTURE_GEN_T); - glDisable(GL_TEXTURE_GEN_R); - - glMatrixMode(GL_MODELVIEW); - glPushMatrix(); - glRotatef(Xrot, 1, 0, 0); - glRotatef(Yrot, 0, 1, 0); - draw_skybox(); - glPopMatrix(); - - /* sphere */ - glMatrixMode(GL_TEXTURE); - glLoadIdentity(); - glRotatef(-Yrot, 0, 1, 0); - glRotatef(-Xrot, 1, 0, 0); - - glEnable(GL_TEXTURE_GEN_S); - glEnable(GL_TEXTURE_GEN_T); - glEnable(GL_TEXTURE_GEN_R); - glutSolidSphere(2.0, 20, 20); - - glLoadIdentity(); /* texture */ - - glMatrixMode(GL_MODELVIEW); - glPopMatrix(); - - glutSwapBuffers(); - - Frames++; - - { - GLint t = glutGet(GLUT_ELAPSED_TIME); - if (t - T0 >= 5000) { - GLfloat seconds = (t - T0) / 1000.0; - GLfloat fps = Frames / seconds; - printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps); - fflush(stdout); - T0 = t; - Frames = 0; - } - } -} - - -static void idle(void) -{ - GLfloat t = 0.05 * glutGet(GLUT_ELAPSED_TIME); - Yrot = t; - glutPostRedisplay(); -} - - -static void set_mode(GLuint mode) -{ - if (mode == 0) { - glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB); - glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB); - glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB); - printf("GL_REFLECTION_MAP_ARB mode\n"); - } - else if (mode == 1) { - glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB); - glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB); - glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_ARB); - printf("GL_NORMAL_MAP_ARB mode\n"); - } -} - - -static void key(unsigned char k, int x, int y) -{ - static GLuint mode = 0; - (void) x; - (void) y; - switch (k) { - case ' ': - anim = !anim; - if (anim) - glutIdleFunc(idle); - else - glutIdleFunc(NULL); - break; - case 'f': - FilterIndex = (FilterIndex + 1) % NUM_FILTER_MODES; - printf("Tex filter: %s\n", FilterModes[FilterIndex].name); - break; - case 'c': - ClampIndex = (ClampIndex + 1) % NUM_CLAMP_MODES; - printf("Tex wrap mode: %s\n", ClampModes[ClampIndex].name); - break; - case 'm': - mode = !mode; - set_mode(mode); - break; - case 's': - seamless = ! seamless; - printf("Seamless cube map filtering is %sabled\n", - (seamless) ? "en" : "dis" ); - break; - case 'v': - use_vertex_arrays = ! use_vertex_arrays; - printf( "Vertex arrays are %sabled\n", - (use_vertex_arrays) ? "en" : "dis" ); - break; - case 'z': - EyeDist -= 0.5; - if (EyeDist < 6.0) - EyeDist = 6.0; - break; - case 'Z': - EyeDist += 0.5; - if (EyeDist > 90.0) - EyeDist = 90; - break; - case 27: - exit(0); - } - glutPostRedisplay(); -} - - -static void specialkey(int key, int x, int y) -{ - GLfloat step = 5; - (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(); -} - - -/* new window size or exposure */ -static void reshape(int width, int height) -{ - GLfloat ar = (float) width / (float) height; - glViewport(0, 0, (GLint)width, (GLint)height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum( -2.0*ar, 2.0*ar, -2.0, 2.0, 4.0, 100.0 ); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); -} - - -static void init_checkers( void ) -{ -#define CUBE_TEX_SIZE 64 - GLubyte image[CUBE_TEX_SIZE][CUBE_TEX_SIZE][4]; - static const GLubyte colors[6][3] = { - { 255, 0, 0 }, /* face 0 - red */ - { 0, 255, 255 }, /* face 1 - cyan */ - { 0, 255, 0 }, /* face 2 - green */ - { 255, 0, 255 }, /* face 3 - purple */ - { 0, 0, 255 }, /* face 4 - blue */ - { 255, 255, 0 } /* face 5 - yellow */ - }; - static const GLenum targets[6] = { - GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB, - GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB, - GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB, - GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB, - GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB, - GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB - }; - - GLint i, j, f; - - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - - if (!supportFBO) - glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB, GL_GENERATE_MIPMAP_SGIS, GL_TRUE); - - - /* make colored checkerboard cube faces */ - for (f = 0; f < 6; f++) { - for (i = 0; i < CUBE_TEX_SIZE; i++) { - for (j = 0; j < CUBE_TEX_SIZE; j++) { - if ((i/4 + j/4) & 1) { - image[i][j][0] = colors[f][2]; - image[i][j][1] = colors[f][1]; - image[i][j][2] = colors[f][0]; - image[i][j][3] = 255; - } - else { - image[i][j][0] = 255; - image[i][j][1] = 255; - image[i][j][2] = 255; - image[i][j][3] = 255; - } - } - } - - glTexImage2D(targets[f], 0, GL_RGBA8, CUBE_TEX_SIZE, CUBE_TEX_SIZE, 0, - GL_BGRA, GL_UNSIGNED_BYTE, image); - } - - if (supportFBO) - glGenerateMipmapEXT(GL_TEXTURE_CUBE_MAP_ARB); -} - - -static void load(GLenum target, const char *filename, - GLboolean flipTB, GLboolean flipLR) -{ - GLint w, h; - GLenum format; - GLubyte *img = LoadRGBImage( filename, &w, &h, &format ); - if (!img) { - printf("Error: couldn't load texture image %s\n", filename); - exit(1); - } - assert(format == GL_RGB); - - /* <sigh> the way the texture cube mapping works, we have to flip - * images to make things look right. - */ - if (flipTB) { - const int stride = 3 * w; - GLubyte temp[3*1024]; - int i; - for (i = 0; i < h / 2; i++) { - memcpy(temp, img + i * stride, stride); - memcpy(img + i * stride, img + (h - i - 1) * stride, stride); - memcpy(img + (h - i - 1) * stride, temp, stride); - } - } - if (flipLR) { - const int stride = 3 * w; - GLubyte temp[3]; - GLubyte *row; - int i, j; - for (i = 0; i < h; i++) { - row = img + i * stride; - for (j = 0; j < w / 2; j++) { - int k = w - j - 1; - temp[0] = row[j*3+0]; - temp[1] = row[j*3+1]; - temp[2] = row[j*3+2]; - row[j*3+0] = row[k*3+0]; - row[j*3+1] = row[k*3+1]; - row[j*3+2] = row[k*3+2]; - row[k*3+0] = temp[0]; - row[k*3+1] = temp[1]; - row[k*3+2] = temp[2]; - } - } - } - - gluBuild2DMipmaps(target, GL_RGB, w, h, format, GL_UNSIGNED_BYTE, img); - free(img); -} - - -static void load_envmaps(void) -{ - load(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB, "right.rgb", GL_TRUE, GL_FALSE); - load(GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB, "left.rgb", GL_TRUE, GL_FALSE); - load(GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB, "top.rgb", GL_FALSE, GL_TRUE); - load(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB, "bottom.rgb", GL_FALSE, GL_TRUE); - load(GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB, "front.rgb", GL_TRUE, GL_FALSE); - load(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB, "back.rgb", GL_TRUE, GL_FALSE); -} - - -static void init( GLboolean useImageFiles ) -{ - /* check for extensions */ - if (!GLEW_ARB_texture_cube_map) { - printf("Sorry, this demo requires GL_ARB_texture_cube_map\n"); - exit(0); - } - - /* Needed for glGenerateMipmapEXT / auto mipmapping - */ - supportFBO = GLEW_EXT_framebuffer_object; - - if (!supportFBO && !GLEW_SGIS_generate_mipmap) { - printf("Sorry, this demo requires GL_EXT_framebuffer_object or " - "GL_SGIS_generate_mipmap\n"); - exit(0); - } - - /* GLEW doesn't know about this extension yet, so use the old GLUT function - * to check for availability. - */ - supportSeamless = glutExtensionSupported("GL_ARB_seamless_cube_map"); - - printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER)); - - - glGenTextures(1, &TexObj); - glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, TexObj); - - if (useImageFiles) { - load_envmaps(); - } - else { - init_checkers(); - } - - glEnable(GL_TEXTURE_CUBE_MAP_ARB); - glEnable(GL_DEPTH_TEST); - - glClearColor(.3, .3, .3, 0); - glColor3f( 1.0, 1.0, 1.0 ); - - set_mode(0); -} - - -static void usage(void) -{ - printf("keys:\n"); - printf(" SPACE - toggle animation\n"); - printf(" CURSOR KEYS - rotation\n"); - printf(" c - toggle texture clamp/wrap mode\n"); - printf(" f - toggle texture filter mode\n"); - printf(" m - toggle texgen reflection mode\n"); - printf(" z/Z - change viewing distance\n"); -} - - -static void parse_args(int argc, char *argv[]) -{ - int initFlag = 0; - int i; - - for (i = 1; i < argc; i++) { - if (strcmp(argv[i], "-i") == 0) - initFlag = 1; - else if (strcmp(argv[i], "--noclear") == 0) - NoClear = GL_TRUE; - else { - fprintf(stderr, "Bad option: %s\n", argv[i]); - exit(1); - } - } - init (initFlag); -} - -int main( int argc, char *argv[] ) -{ - glutInitWindowSize(600, 500); - glutInit(&argc, argv); - glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE ); - glutCreateWindow("Texture Cube Mapping"); - glewInit(); - glutReshapeFunc( reshape ); - glutKeyboardFunc( key ); - glutSpecialFunc( specialkey ); - glutDisplayFunc( draw ); - if (anim) - glutIdleFunc(idle); - parse_args(argc, argv); - usage(); - glutMainLoop(); - return 0; -} |