/* * gamma libcucul gamma test program * Copyright (c) 2006 Sam Hocevar <sam@zoy.org> * All Rights Reserved * * $Id$ * * This program is free software; you can redistribute it and/or * modify it under the terms of the Do What The Fuck You Want To * Public License, Version 2, as published by Sam Hocevar. See * http://sam.zoy.org/wtfpl/COPYING for more details. */ #include "config.h" #include "common.h" #if defined(HAVE_INTTYPES_H) # include <inttypes.h> #endif #if !defined(__KERNEL__) # include <stdio.h> # include <math.h> #endif #include "cucul.h" #include "caca.h" uint32_t buffer[256 * 4]; int main(void) { caca_event_t ev; cucul_canvas_t *cv, *cw, *mask; caca_display_t *dp; cucul_dither_t *left, *right; float gam = 1.0; int x; cv = cucul_create_canvas(0, 0); dp = caca_create_display(cv); cw = cucul_create_canvas(cucul_get_canvas_width(cv), cucul_get_canvas_height(cv)); mask = cucul_create_canvas(cucul_get_canvas_width(cv), cucul_get_canvas_height(cv)); for(x = 0; x < 256; x++) { buffer[x] = (x << 16) | (x << 8) | (x<< 0); buffer[x + 256] = (0xff << 16) | (x << 8) | (0x00 << 0); buffer[x + 512] = (0x00 << 16) | (0xff << 8) | (x << 0); buffer[x + 768] = (x << 16) | (0x00 << 8) | (0xff << 0); } left = cucul_create_dither(32, 256, 4, 4 * 256, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x0); right = cucul_create_dither(32, 256, 4, 4 * 256, 0x00ff0000, 0x0000ff00, 0x000000ff, 0x0); caca_set_delay(dp, 20000); for(x = 0; ; x++) { int ret = caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, 0); if(ret) { if(ev.data.key.ch == CACA_KEY_LEFT) gam /= 1.03; else if(ev.data.key.ch == CACA_KEY_RIGHT) gam *= 1.03; else if(ev.data.key.ch == CACA_KEY_DOWN) gam = 1.0; else if(ev.data.key.ch == CACA_KEY_ESCAPE) break; } /* Resize the spare canvas, just in case the main one changed */ cucul_set_canvas_size(cw, cucul_get_canvas_width(cv), cucul_get_canvas_height(cv)); cucul_set_canvas_size(mask, cucul_get_canvas_width(cv), cucul_get_canvas_height(cv)); /* Draw the regular dither on the main canvas */ cucul_dither_bitmap(cv, 0, 0, cucul_get_canvas_width(cv), cucul_get_canvas_height(cv), left, buffer); /* Draw the gamma-modified dither on the spare canvas */ cucul_set_dither_gamma(right, gam); cucul_dither_bitmap(cw, 0, 0, cucul_get_canvas_width(cw), cucul_get_canvas_height(cw), right, buffer); /* Draw something on the mask */ cucul_set_color(cv, CUCUL_COLOR_LIGHTGRAY, CUCUL_COLOR_BLACK); cucul_clear_canvas(mask); cucul_set_color(mask, CUCUL_COLOR_WHITE, CUCUL_COLOR_WHITE); cucul_fill_ellipse(mask, (1.0 + sin(0.05 * (float)x)) * 0.5 * cucul_get_canvas_width(mask), (1.0 + cos(0.05 * (float)x)) * 0.5 * cucul_get_canvas_height(mask), cucul_get_canvas_width(mask) / 2, cucul_get_canvas_height(mask) / 2, "#"); /* Blit the spare canvas onto the first one */ cucul_blit(cv, 0, 0, cw, mask); cucul_set_color(cv, CUCUL_COLOR_WHITE, CUCUL_COLOR_BLUE); cucul_printf(cv, 2, 1, "gamma=%g - use arrows to change, Esc to quit", gam); caca_refresh_display(dp); } cucul_free_dither(left); cucul_free_dither(right); caca_free_display(dp); cucul_free_canvas(cv); return 0; }