diff options
Diffstat (limited to 'hacks/glx/flurry-texture.c')
| -rw-r--r-- | hacks/glx/flurry-texture.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/hacks/glx/flurry-texture.c b/hacks/glx/flurry-texture.c deleted file mode 100644 index f1b7e36..0000000 --- a/hacks/glx/flurry-texture.c +++ /dev/null @@ -1,225 +0,0 @@ -/* - -Copyright (c) 2002, Calum Robinson -All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - -* Redistributions of source code must retain the above copyright notice, this - list of conditions and the following disclaimer. - -* Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - -* Neither the name of the author nor the names of its contributors may be used - to endorse or promote products derived from this software without specific - prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND -ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED -WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE -DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR -ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES -(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON -ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS -SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -*/ - -/* - * Texture.c - * AppleFlurry - * - * Created by calumr on Sat Jul 07 2001. - * Copyright (c) 2001 __CompanyName__. All rights reserved. - * - */ - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif - -#include "flurry.h" - -#include <GL/gl.h> -#include <GL/glu.h> - -#include <stdlib.h> -#include <math.h> - -static GLubyte smallTextureArray[32][32]; -static GLubyte bigTextureArray[256][256][2]; - -/* simple smoothing routine */ -static void SmoothTexture(void) -{ - GLubyte filter[32][32]; - int i,j; - float t; - for (i=1;i<31;i++) - { - for (j=1;j<31;j++) - { - t = (float) smallTextureArray[i][j]*4; - t += (float) smallTextureArray[i-1][j]; - t += (float) smallTextureArray[i+1][j]; - t += (float) smallTextureArray[i][j-1]; - t += (float) smallTextureArray[i][j+1]; - t /= 8.0f; - filter[i][j] = (GLubyte) t; - } - } - for (i=1;i<31;i++) - { - for (j=1;j<31;j++) - { - smallTextureArray[i][j] = filter[i][j]; - } - } -} - -/* add some randomness to texture data */ -static void SpeckleTexture(void) -{ - int i,j; - int speck; - float t; - for (i=2;i<30;i++) - { - for (j=2;j<30;j++) - { - speck = 1; - while (speck <= 32 && random() % 2) - { - t = (float) MIN_(255,smallTextureArray[i][j]+speck); - smallTextureArray[i][j] = (GLubyte) t; - speck+=speck; - } - speck = 1; - while (speck <= 32 && random() % 2) - { - t = (float) MAX_(0,smallTextureArray[i][j]-speck); - smallTextureArray[i][j] = (GLubyte) t; - speck+=speck; - } - } - } -} - -static void MakeSmallTexture(void) -{ - static int firstTime = 1; - int i,j; - float r,t; - if (firstTime) - { - firstTime = 0; - for (i=0;i<32;i++) - { - for (j=0;j<32;j++) - { - r = (float) sqrt((i-15.5)*(i-15.5)+(j-15.5)*(j-15.5)); - if (r > 15.0f) - { - smallTextureArray[i][j] = 0; - } - else - { - t = 255.0f * (float) cos(r*M_PI/31.0); - smallTextureArray[i][j] = (GLubyte) t; - } - } - } - } - else - { - for (i=0;i<32;i++) - { - for (j=0;j<32;j++) - { - r = (float) sqrt((i-15.5)*(i-15.5)+(j-15.5)*(j-15.5)); - if (r > 15.0f) - { - t = 0.0f; - } - else - { - t = 255.0f * (float) cos(r*M_PI/31.0); - } - smallTextureArray[i][j] = (GLubyte) MIN_(255,(t+smallTextureArray[i][j]+smallTextureArray[i][j])/3); - } - } - } - SpeckleTexture(); - SmoothTexture(); - SmoothTexture(); -} - -static void CopySmallTextureToBigTexture(int k, int l) -{ - int i,j; - for (i=0;i<32;i++) - { - for (j=0;j<32;j++) - { - bigTextureArray[i+k][j+l][0] = smallTextureArray[i][j]; - bigTextureArray[i+k][j+l][1] = smallTextureArray[i][j]; - } - } -} - -static void AverageLastAndFirstTextures(void) -{ - int i,j; - int t; - for (i=0;i<32;i++) - { - for (j=0;j<32;j++) - { - t = (smallTextureArray[i][j] + bigTextureArray[i][j][0]) / 2; - smallTextureArray[i][j] = (GLubyte) MIN_(255,t); - } - } -} - -GLuint MakeTexture(void) -{ - GLuint theTexture = 0; - int i,j; - for (i=0;i<8;i++) - { - for (j=0;j<8;j++) - { - if (i==7 && j==7) - { - AverageLastAndFirstTextures(); - } - else - { - MakeSmallTexture(); - } - CopySmallTextureToBigTexture(i*32,j*32); - } - } - - glPixelStorei(GL_UNPACK_ALIGNMENT,1); - - glGenTextures(1, &theTexture); - glBindTexture(GL_TEXTURE_2D, theTexture); - - /* Set the tiling mode (this is generally always GL_REPEAT). */ - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - - /* Set the filtering. */ - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST); - - gluBuild2DMipmaps(GL_TEXTURE_2D, 2, 256, 256, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, bigTextureArray); - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); - return theTexture; -} |