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преди 18 години
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  1. /*
  2. * gamma libcucul gamma test program
  3. * Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
  4. * All Rights Reserved
  5. *
  6. * $Id$
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the Do What The Fuck You Want To
  10. * Public License, Version 2, as published by Sam Hocevar. See
  11. * http://sam.zoy.org/wtfpl/COPYING for more details.
  12. */
  13. #include "config.h"
  14. #include "common.h"
  15. #if !defined(__KERNEL__)
  16. # if defined(HAVE_INTTYPES_H)
  17. # include <inttypes.h>
  18. # endif
  19. # include <stdio.h>
  20. # include <math.h>
  21. #endif
  22. #include "cucul.h"
  23. #include "caca.h"
  24. uint32_t buffer[256 * 4];
  25. int main(int argc, char *argv[])
  26. {
  27. caca_event_t ev;
  28. cucul_canvas_t *cv, *cw, *mask;
  29. caca_display_t *dp;
  30. cucul_dither_t *left, *right;
  31. float gam = 1.0;
  32. int x;
  33. cv = cucul_create_canvas(0, 0);
  34. dp = caca_create_display(cv);
  35. cw = cucul_create_canvas(cucul_get_canvas_width(cv), cucul_get_canvas_height(cv));
  36. mask = cucul_create_canvas(cucul_get_canvas_width(cv), cucul_get_canvas_height(cv));
  37. for(x = 0; x < 256; x++)
  38. {
  39. buffer[x] = (x << 16) | (x << 8) | (x<< 0);
  40. buffer[x + 256] = (0xff << 16) | (x << 8) | (0x00 << 0);
  41. buffer[x + 512] = (0x00 << 16) | (0xff << 8) | (x << 0);
  42. buffer[x + 768] = (x << 16) | (0x00 << 8) | (0xff << 0);
  43. }
  44. left = cucul_create_dither(32, 256, 4, 4 * 256,
  45. 0x00ff0000, 0x0000ff00, 0x000000ff, 0x0);
  46. right = cucul_create_dither(32, 256, 4, 4 * 256,
  47. 0x00ff0000, 0x0000ff00, 0x000000ff, 0x0);
  48. caca_set_display_time(dp, 20000);
  49. for(x = 0; ; x++)
  50. {
  51. int ret = caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, 0);
  52. if(ret)
  53. {
  54. if(ev.data.key.ch == CACA_KEY_LEFT)
  55. gam /= 1.03;
  56. else if(ev.data.key.ch == CACA_KEY_RIGHT)
  57. gam *= 1.03;
  58. else if(ev.data.key.ch == CACA_KEY_DOWN)
  59. gam = 1.0;
  60. else if(ev.data.key.ch == CACA_KEY_ESCAPE)
  61. break;
  62. }
  63. /* Resize the spare canvas, just in case the main one changed */
  64. cucul_set_canvas_size(cw, cucul_get_canvas_width(cv), cucul_get_canvas_height(cv));
  65. cucul_set_canvas_size(mask, cucul_get_canvas_width(cv), cucul_get_canvas_height(cv));
  66. /* Draw the regular dither on the main canvas */
  67. cucul_dither_bitmap(cv, 0, 0, cucul_get_canvas_width(cv),
  68. cucul_get_canvas_height(cv), left, buffer);
  69. /* Draw the gamma-modified dither on the spare canvas */
  70. cucul_set_dither_gamma(right, gam);
  71. cucul_dither_bitmap(cw, 0, 0, cucul_get_canvas_width(cw),
  72. cucul_get_canvas_height(cw), right, buffer);
  73. /* Draw something on the mask */
  74. cucul_set_color_ansi(mask, CUCUL_LIGHTGRAY, CUCUL_BLACK);
  75. cucul_clear_canvas(mask);
  76. cucul_set_color_ansi(mask, CUCUL_WHITE, CUCUL_WHITE);
  77. cucul_fill_ellipse(mask, (1.0 + sin(0.05 * (float)x))
  78. * 0.5 * cucul_get_canvas_width(mask),
  79. (1.0 + cos(0.05 * (float)x))
  80. * 0.5 * cucul_get_canvas_height(mask),
  81. cucul_get_canvas_width(mask) / 2,
  82. cucul_get_canvas_height(mask) / 2, "#");
  83. /* Blit the spare canvas onto the first one */
  84. cucul_blit(cv, 0, 0, cw, mask);
  85. cucul_set_color_ansi(cv, CUCUL_WHITE, CUCUL_BLUE);
  86. cucul_printf(cv, 2, 1,
  87. "gamma=%g - use arrows to change, Esc to quit", gam);
  88. caca_refresh_display(dp);
  89. }
  90. cucul_free_dither(left);
  91. cucul_free_dither(right);
  92. caca_free_display(dp);
  93. cucul_free_canvas(cv);
  94. return 0;
  95. }