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"
15 #endif // HAVE_STDLIB_H
18 #define _(str) gettext(str)
23 TrueRenderControl::TrueRenderControl(int screen)
24 : RenderControl(screen),
29 printf("Initializing TrueColor RenderControl\n");
31 Visual *visual = display->screenInfo(_screen)->visual();
32 unsigned long red_mask, green_mask, blue_mask;
34 // find the offsets for each color in the visual's masks
35 red_mask = visual->red_mask;
36 green_mask = visual->green_mask;
37 blue_mask = visual->blue_mask;
39 while (! (red_mask & 1)) { _red_offset++; red_mask >>= 1; }
40 while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; }
41 while (! (blue_mask & 1)) { _blue_offset++; blue_mask >>= 1; }
43 _red_shift = _green_shift = _blue_shift = 8;
44 while (red_mask) { red_mask >>= 1; _red_shift--; }
45 while (green_mask) { green_mask >>= 1; _green_shift--; }
46 while (blue_mask) { blue_mask >>= 1; _blue_shift--; }
49 TrueRenderControl::~TrueRenderControl()
51 printf("Destroying TrueColor RenderControl\n");
57 static inline void renderPixel(XImage *im, unsigned char *dp,
60 unsigned int bpp = im->bits_per_pixel + (im->byte_order == MSBFirst ? 1 : 0);
97 assert(false); // wtf?
101 void TrueRenderControl::drawBackground(Surface& sf,
102 const RenderTexture &texture) const
106 assert(sf._screen == _screen);
108 int w = sf.width(), h = sf.height();
110 const ScreenInfo *info = display->screenInfo(_screen);
111 XImage *im = XCreateImage(**display, info->visual(), info->depth(),
112 ZPixmap, 0, NULL, w, h, 32, 0);
114 unsigned char *data = new unsigned char[im->bytes_per_line * h];
115 unsigned char *dp = data;
116 unsigned int bytes_per_pixel = im->bits_per_pixel/8;
118 for (int y = 0; y < h/3; ++y)
119 for (int x = 0; x < w; ++x, dp += bytes_per_pixel)
120 renderPixel(im, dp, (255*x/w) >> _red_shift << _red_offset);
121 for (int y = 0; y < h/3; ++y)
122 for (int x = 0; x < w; ++x, dp += bytes_per_pixel)
123 renderPixel(im, dp, (255*x/w) >> _green_shift << _green_offset);
124 for (int y = 0; y < h/3; ++y)
125 for (int x = 0; x < w; ++x, dp += bytes_per_pixel)
126 renderPixel(im, dp, (255*x/w) >> _blue_shift << _blue_offset);
128 im->data = (char*) data;