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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"
#include "surface.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),
_red_offset(0),
_green_offset(0),
_blue_offset(0)
{
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; }
// scale available colorspace to match our 256x256x256 cube
_red_bits = 255 / red_mask;
_green_bits = 255 / green_mask;
_blue_bits = 255 / blue_mask;
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");
}
static inline void renderPixel(XImage *im, unsigned char *dp,
unsigned long pixel)
{
unsigned int bpp = im->bits_per_pixel + (im->byte_order == MSBFirst ? 1 : 0);
switch (bpp) {
case 8: // 8bpp
*dp++ = pixel;
break;
case 16: // 16bpp LSB
*dp++ = pixel;
*dp++ = pixel >> 8;
break;
case 17: // 16bpp MSB
*dp++ = pixel >> 8;
*dp++ = pixel;
break;
case 24: // 24bpp LSB
*dp++ = pixel;
*dp++ = pixel >> 8;
*dp++ = pixel >> 16;
break;
case 25: // 24bpp MSB
*dp++ = pixel >> 16;
*dp++ = pixel >> 8;
*dp++ = pixel;
break;
case 32: // 32bpp LSB
*dp++ = pixel;
*dp++ = pixel >> 8;
*dp++ = pixel >> 16;
*dp++ = pixel >> 24;
break;
case 33: // 32bpp MSB
*dp++ = pixel >> 24;
*dp++ = pixel >> 16;
*dp++ = pixel >> 8;
*dp++ = pixel;
break;
default:
assert(false); // wtf?
}
}
void TrueRenderControl::render(Surface *sf)
{
assert(sf);
int w = sf->width(), h = sf->height();
XImage *im = XCreateImage(**display, _screen->visual(), _screen->depth(),
ZPixmap, 0, NULL, w, h, 32, 0);
unsigned char *data = new unsigned char[im->bytes_per_line * h];
unsigned char *dp = data;
for (int y = 0; y < h/3; ++y)
for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
renderPixel(im, dp, _red_color_table[255*x/w] << _red_offset);
for (int y = 0; y < h/3; ++y)
for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
renderPixel(im, dp, _green_color_table[255*x/w] << _green_offset);
for (int y = 0; y < h/3; ++y)
for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
renderPixel(im, dp, _blue_color_table[255*x/w] << _blue_offset);
printf("\nDone %d %d\n", im->bytes_per_line * h, dp - data);
im->data = (char*) data;
if (!sf->_pm)
sf->_pm = XCreatePixmap(**display, _screen->rootWindow(), w, h,
_screen->depth());
XPutImage(**display, sf->_pm, DefaultGC(**display, _screen->screen()),
im, 0, 0, 0, 0, w, h);
//delete [] image->data;
//image->data = NULL;
XDestroyImage(im);
}
}
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