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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
#ifdef HAVE_CONFIG_H
# include "../config.h"
#endif // HAVE_CONFIG_H
#include "truerendercontrol.hh"
#include "display.hh"
#include "screeninfo.hh"
extern "C" {
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif // HAVE_STDLIB_H
#include "gettext.h"
#define _(str) gettext(str)
}
namespace otk {
TrueRenderControl::TrueRenderControl(const ScreenInfo *screen)
: RenderControl(screen)
{
printf("Initializing TrueColor RenderControl\n");
unsigned long red_mask, green_mask, blue_mask;
// find the offsets for each color in the visual's masks
red_mask = screen->visual()->red_mask;
green_mask = screen->visual()->green_mask;
blue_mask = screen->visual()->blue_mask;
while (! (red_mask & 1)) { _red_offset++; red_mask >>= 1; }
while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; }
while (! (blue_mask & 1)) { _blue_offset++; blue_mask >>= 1; }
// use the mask to determine the number of bits for each shade of color
// so, best case, red_mask == 0xff (255), with each bit as a different
// shade!
_red_bits = 255 / red_mask;
_green_bits = 255 / green_mask;
_blue_bits = 255 / blue_mask;
// compute color tables, based on the number of bits for each shade
for (int i = 0; i < 256; i++) {
_red_color_table[i] = i / _red_bits;
_green_color_table[i] = i / _green_bits;
_blue_color_table[i] = i / _blue_bits;
}
}
TrueRenderControl::~TrueRenderControl()
{
printf("Destroying TrueColor RenderControl\n");
}
void TrueRenderControl::render(::Drawable d)
{
XGCValues gcv;
gcv.cap_style = CapProjecting;
int w = 255, h = 32;
Pixmap p = XCreatePixmap(**display, d, w, h, _screen->depth());
XImage *im = XCreateImage(**display, _screen->visual(), _screen->depth(),
ZPixmap, 0, NULL, w, h, 32, 0);
//GC gc = XCreateGC(**display, _screen->rootWindow(), GCCapStyle, &gcv);
im->data = new char[im->bytes_per_line * (h + 1)]; // XXX + 1?
char *dp = im->data;
for (int x = 0; x < w; ++x, ++dp)
*dp = 0;
for (int y = 0; y < 10; ++h)
for (int x = 0; x < w; ++x, ++dp)
*dp = _red_color_table[x] << _red_offset;
for (int y = 0; y < 10; ++h)
for (int x = 0; x < w; ++x, ++dp)
*dp = _green_color_table[x] << _green_offset;
for (int y = 0; y < 10; ++h)
for (int x = 0; x < w; ++x, ++dp)
*dp = _blue_color_table[x] << _blue_offset;
for (int x = 0; x < w; ++x, ++dp)
*dp = 0;
XPutImage(**display, p, DefaultGC(**display, _screen->screen()),
im, 0, 0, 0, 0, w, h);
//delete [] image->data;
//image->data = NULL;
XDestroyImage(im);
XCopyArea(**display, p, d, DefaultGC(**display, _screen->screen()),
0, 0, w, h, 0, 0);
XFreePixmap(**display, p);
}
}
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