1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
4 # include "../config.h"
5 #endif // HAVE_CONFIG_H
7 #include "truerendercontrol.hh"
9 #include "screeninfo.hh"
14 #endif // HAVE_STDLIB_H
17 #define _(str) gettext(str)
22 TrueRenderControl::TrueRenderControl(const ScreenInfo *screen)
23 : RenderControl(screen)
25 printf("Initializing TrueColor RenderControl\n");
27 unsigned long red_mask, green_mask, blue_mask;
29 // find the offsets for each color in the visual's masks
30 red_mask = screen->visual()->red_mask;
31 green_mask = screen->visual()->green_mask;
32 blue_mask = screen->visual()->blue_mask;
34 while (! (red_mask & 1)) { _red_offset++; red_mask >>= 1; }
35 while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; }
36 while (! (blue_mask & 1)) { _blue_offset++; blue_mask >>= 1; }
38 // use the mask to determine the number of bits for each shade of color
39 // so, best case, red_mask == 0xff (255), with each bit as a different
41 _red_bits = 255 / red_mask;
42 _green_bits = 255 / green_mask;
43 _blue_bits = 255 / blue_mask;
45 // compute color tables, based on the number of bits for each shade
46 for (int i = 0; i < 256; i++) {
47 _red_color_table[i] = i / _red_bits;
48 _green_color_table[i] = i / _green_bits;
49 _blue_color_table[i] = i / _blue_bits;
53 TrueRenderControl::~TrueRenderControl()
55 printf("Destroying TrueColor RenderControl\n");
60 void TrueRenderControl::render(::Drawable d)