libvo/matrixview.c

   1 /*
   2  * Copyright (C) 2003 Alex Zolotov <nightradio@knoppix.ru>
   3  * Mucked with by Tugrul Galatali <tugrul@galatali.com>
   4  *
   5  * MatrixView is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * MatrixView is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with MatrixView; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 /**
  21  * Ported to an MPlayer video out plugin by Pigeon <pigeon at pigeond.net>
  22  * August 2006
  23  */
  24
  25 #include <math.h>
  26 #include <stdio.h>
  27 #include <stdint.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include "gl_common.h"
  31 #include "matrixview.h"
  32 #include "matrixview_font.h"
  33
  34 static float matrix_contrast   = 1.5;
  35 static float matrix_brightness = 1.0;
  36
  37 // Settings for our light.  Try playing with these (or add more lights).
  38 static float Light_Ambient[]  = { 0.1f, 0.1f, 0.1f, 1.0f };
  39 static float Light_Diffuse[]  = { 1.2f, 1.2f, 1.2f, 1.0f };
  40 static float Light_Position[] = { 2.0f, 2.0f, 0.0f, 1.0f };
  41
  42 static const uint8_t flare[4][4] = {
  43     {  0,   0,   0,   0},
  44     {  0, 180,   0,   0},
  45     {  0,   0,   0,   0},
  46     {  0,   0,   0,   0}
  47 };
  48
  49 #define MAX_TEXT_X 0x4000
  50 #define MAX_TEXT_Y 0x4000
  51 static int text_x = 0;
  52 static int text_y = 0;
  53 #define _text_x text_x/2
  54 #define _text_y text_y/2
  55
  56 // Scene position
  57 #define Z_Off -128.0f
  58 #define Z_Depth 8
  59
  60 static uint8_t *speed;
  61 static uint8_t *text;
  62 static uint8_t *text_light;
  63 static float *text_depth;
  64
  65 static float *bump_pic;
  66
  67 static void draw_char(int num, float light, float x, float y, float z)
  68 {
  69     float tx, ty;
  70     int num2, num3;
  71
  72     num &= 63;
  73     //light = light / 255;        //light=7-light;num+=(light*60);
  74     light = light / 255 * matrix_brightness;
  75     num2 = num / 10;
  76     num3 = num - (num2 * 10);
  77     ty = (float)num2 / 7;
  78     tx = (float)num3 / 10;
  79     Normal3f(0.0f, 0.0f, 1.0f);        // Needed for lighting
  80     Color4f(0.0, 1.0, 0.0, light);        // Basic polygon color
  81
  82     TexCoord2f(tx, ty);
  83     Vertex3f(x, y, z);
  84     TexCoord2f(tx + 0.1, ty);
  85     Vertex3f(x + 1, y, z);
  86     TexCoord2f(tx + 0.1, ty + 0.166);
  87     Vertex3f(x + 1, y - 1, z);
  88     TexCoord2f(tx, ty + 0.166);
  89     Vertex3f(x, y - 1, z);
  90 }
  91
  92 static void draw_illuminatedchar(int num, float x, float y, float z)
  93 {
  94     float tx, ty;
  95     int num2, num3;
  96
  97     num2 = num / 10;
  98     num3 = num - (num2 * 10);
  99     ty = (float)num2 / 7;
 100     tx = (float)num3 / 10;
 101     Normal3f(0.0f, 0.0f, 1.0f);        // Needed for lighting
 102     Color4f(1.0, 1.0, 1.0, .5);        // Basic polygon color
 103
 104     TexCoord2f(tx, ty);
 105     Vertex3f(x, y, z);
 106     TexCoord2f(tx + 0.1, ty);
 107     Vertex3f(x + 1, y, z);
 108     TexCoord2f(tx + 0.1, ty + 0.166);
 109     Vertex3f(x + 1, y - 1, z);
 110     TexCoord2f(tx, ty + 0.166);
 111     Vertex3f(x, y - 1, z);
 112 }
 113
 114 static void draw_flare(float x, float y, float z)        //flare
 115 {
 116     Normal3f(0.0f, 0.0f, 1.0f);        // Needed for lighting
 117     Color4f(1.0, 1.0, 1.0, .8);        // Basic polygon color
 118
 119     TexCoord2f(0, 0);
 120     Vertex3f(x - 1, y + 1, z);
 121     TexCoord2f(0.75, 0);
 122     Vertex3f(x + 2, y + 1, z);
 123     TexCoord2f(0.75, 0.75);
 124     Vertex3f(x + 2, y - 2, z);
 125     TexCoord2f(0, 0.75);
 126     Vertex3f(x - 1, y - 2, z);
 127 }
 128
 129 static void draw_text(uint8_t *pic)
 130 {
 131     int x, y;
 132     int p = 0;
 133     int c, c_pic;
 134     int pic_fade = 255;
 135
 136     for (y = _text_y; y > -_text_y; y--) {
 137         for (x = -_text_x; x < _text_x; x++) {
 138             c  = text_light[p] - (text[p] >> 1);
 139             c += pic_fade;
 140             if (c > 255)
 141                 c = 255;
 142
 143             if (pic) {
 144                 // Original code
 145                 //c_pic = pic[p] * matrix_contrast - (255 - pic_fade);
 146
 147                 c_pic = (255 - pic[p]) * matrix_contrast - (255 - pic_fade);
 148
 149                 if (c_pic < 0)
 150                     c_pic = 0;
 151
 152                 c -= c_pic;
 153
 154                 if (c < 0)
 155                     c = 0;
 156
 157                 bump_pic[p] = (255.0f - c_pic) / (256 / Z_Depth);
 158             } else {
 159                 bump_pic[p] = Z_Depth;
 160             }
 161
 162             if (text[p] && c > 10)
 163                 draw_char(text[p] + 1, c, x, y, text_depth[p] + bump_pic[p]);
 164
 165             if (text_depth[p] < 0.1)
 166                 text_depth[p] = 0;
 167             else
 168                 text_depth[p] /= 1.1;
 169
 170             if (text_light[p] > 128 && text_light[p + text_x] < 10)
 171                 draw_illuminatedchar(text[p] + 1, x, y,
 172                                      text_depth[p] + bump_pic[p]);
 173
 174             p++;
 175         }
 176     }
 177 }
 178
 179 static void draw_flares(void)
 180 {
 181     float x, y;
 182     int p = 0;
 183
 184     for (y = _text_y; y > -_text_y; y--) {
 185         for (x = -_text_x; x < _text_x; x++) {
 186             if (text_light[p] > 128 && text_light[p + text_x] < 10)
 187                 draw_flare(x, y, text_depth[p] + bump_pic[p]);
 188             p++;
 189         }
 190     }
 191 }
 192
 193 static void scroll(double dCurrentTime)
 194 {
 195     int a, s, polovina;
 196     //static double dLastCycle = -1;
 197     static double dLastMove = -1;
 198
 199     if (dCurrentTime - dLastMove > 1.0 / (text_y / 1.5)) {
 200         dLastMove = dCurrentTime;
 201
 202         polovina = text_x * text_y / 2;
 203         s = 0;
 204         for (a = text_x * text_y + text_x - 1; a >= text_x; a--) {
 205             if (speed[s])
 206                 text_light[a] = text_light[a - text_x];        //scroll light table down
 207             s++;
 208             if (s >= text_x)
 209                 s = 0;
 210         }
 211         memmove(text_light + text_x, text_light, text_x * text_y);
 212         memset(text_light, 253, text_x);
 213
 214         s = 0;
 215         for (a = polovina; a < text_x * text_y; a++) {
 216             if (text_light[a] == 255)
 217                 text_light[s] = text_light[s + text_x] >> 1;        //make black bugs in top line
 218
 219             s++;
 220
 221             if (s >= text_x)
 222                 s = 0;
 223         }
 224     }
 225 }
 226
 227 static void make_change(double dCurrentTime)
 228 {
 229     int r = rand() % text_x * text_y;
 230
 231     text[r] += 133;        //random bugs
 232
 233     r = rand() % (4 * text_x);
 234     if (r < text_x && text_light[r])
 235         text_light[r] = 255;        //white bugs
 236
 237     scroll (dCurrentTime);
 238 }
 239
 240
 241 static void make_text(void)
 242 {
 243     int a;
 244
 245     for (a = 0; a < text_x * text_y; a++)
 246         text[a] = rand() >> 8; // avoid the lowest bits of rand()
 247
 248     for (a = 0; a < text_x; a++)
 249         speed[a] = rand() >= RAND_MAX / 2;
 250 }
 251
 252 static void ourBuildTextures(void)
 253 {
 254     TexImage2D(GL_TEXTURE_2D, 0, 1, 128, 64, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE,
 255                font_texture);
 256     TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 257     TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 258
 259     BindTexture(GL_TEXTURE_2D, 1);
 260     TexImage2D(GL_TEXTURE_2D, 0, 1, 4, 4, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE,
 261                flare);
 262     TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 263     TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 264
 265     // Some pretty standard settings for wrapping and filtering.
 266     TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
 267     TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
 268     BindTexture(GL_TEXTURE_2D, 0);
 269 }
 270
 271 void matrixview_init(int w, int h)
 272 {
 273     make_text();
 274
 275     ourBuildTextures();
 276
 277     // Color to clear color buffer to.
 278     ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
 279
 280     // Depth to clear depth buffer to; type of test.
 281     ClearDepth(1.0);
 282     DepthFunc(GL_LESS);
 283
 284     // Enables Smooth Color Shading; try GL_FLAT for (lack of) fun.
 285     ShadeModel(GL_SMOOTH);
 286
 287     // Set up a light, turn it on.
 288     Lightfv(GL_LIGHT1, GL_POSITION, Light_Position);
 289     Lightfv(GL_LIGHT1, GL_AMBIENT, Light_Ambient);
 290     Lightfv(GL_LIGHT1, GL_DIFFUSE, Light_Diffuse);
 291     Enable(GL_LIGHT1);
 292
 293     // A handy trick -- have surface material mirror the color.
 294     ColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
 295     Enable(GL_COLOR_MATERIAL);
 296
 297     // Allow adjusting of texture color via glColor
 298     TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 299
 300     matrixview_reshape(w, h);
 301 }
 302
 303
 304 void matrixview_reshape(int w, int h)
 305 {
 306     Viewport(0, 0, w, h);
 307
 308     MatrixMode(GL_PROJECTION);
 309     LoadIdentity();
 310     Frustum(-_text_x, _text_x, -_text_y, _text_y, -Z_Off - Z_Depth, -Z_Off);
 311
 312     MatrixMode(GL_MODELVIEW);
 313 }
 314
 315
 316 void matrixview_draw(int w, int h, double currentTime, float frameTime,
 317                      uint8_t *data)
 318 {
 319     Enable(GL_BLEND);
 320     Enable(GL_TEXTURE_2D);
 321
 322     Disable(GL_LIGHTING);
 323     BlendFunc(GL_SRC_ALPHA, GL_ONE);
 324     Disable(GL_DEPTH_TEST);
 325
 326     MatrixMode(GL_MODELVIEW);
 327     LoadIdentity();
 328     Translated(0.0f, 0.0f, Z_Off);
 329
 330     // Clear the color and depth buffers.
 331     Clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 332
 333     // OK, let's start drawing our planer quads.
 334     Begin(GL_QUADS);
 335     draw_text(data);
 336     End();
 337
 338     BindTexture(GL_TEXTURE_2D, 1);
 339     Begin(GL_QUADS);
 340     draw_flares();
 341     End();
 342     BindTexture(GL_TEXTURE_2D, 0);
 343
 344     make_change(currentTime);
 345
 346     LoadIdentity();
 347     MatrixMode(GL_PROJECTION);
 348 }
 349
 350 void matrixview_contrast_set(float contrast)
 351 {
 352     matrix_contrast = contrast;
 353 }
 354
 355 void matrixview_brightness_set(float brightness)
 356 {
 357     matrix_brightness = brightness;
 358 }
 359
 360
 361 void matrixview_matrix_resize(int w, int h)
 362 {
 363     int elems;
 364     free(speed);
 365     speed = NULL;
 366     free(text);
 367     text = NULL;
 368     free(text_light);
 369     text_light = NULL;
 370     free(text_depth);
 371     text_depth = NULL;
 372     if (w > MAX_TEXT_X || h > MAX_TEXT_Y)
 373         return;
 374     elems = w * (h + 1);
 375     speed      = calloc(w,     sizeof(*speed));
 376     text       = calloc(elems, sizeof(*text));
 377     text_light = calloc(elems, sizeof(*text_light));
 378     text_depth = calloc(elems, sizeof(*text_depth));
 379     bump_pic   = calloc(elems, sizeof(*bump_pic));
 380     text_x = w;
 381     text_y = h;
 382     make_text();
 383 }