141 lines
3.5 KiB
C++
141 lines
3.5 KiB
C++
// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
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#ifdef HAVE_CONFIG_H
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# include "../config.h"
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#endif // HAVE_CONFIG_H
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#include "truerendercontrol.hh"
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#include "display.hh"
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#include "screeninfo.hh"
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#include "widget.hh"
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extern "C" {
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#endif // HAVE_STDLIB_H
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#include "gettext.h"
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#define _(str) gettext(str)
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}
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namespace otk {
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TrueRenderControl::TrueRenderControl(const ScreenInfo *screen)
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: RenderControl(screen)
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{
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printf("Initializing TrueColor RenderControl\n");
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unsigned long red_mask, green_mask, blue_mask;
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// find the offsets for each color in the visual's masks
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red_mask = screen->visual()->red_mask;
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green_mask = screen->visual()->green_mask;
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blue_mask = screen->visual()->blue_mask;
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while (! (red_mask & 1)) { _red_offset++; red_mask >>= 1; }
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while (! (green_mask & 1)) { _green_offset++; green_mask >>= 1; }
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while (! (blue_mask & 1)) { _blue_offset++; blue_mask >>= 1; }
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// scale available colorspace to match our 256x256x256 cube
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_red_bits = 255 / red_mask;
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_green_bits = 255 / green_mask;
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_blue_bits = 255 / blue_mask;
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for (int i = 0; i < 256; i++) {
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_red_color_table[i] = i / _red_bits;
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_green_color_table[i] = i / _green_bits;
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_blue_color_table[i] = i / _blue_bits;
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}
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}
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TrueRenderControl::~TrueRenderControl()
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{
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printf("Destroying TrueColor RenderControl\n");
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}
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static inline void renderPixel(XImage *im, unsigned char *dp,
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unsigned long pixel)
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{
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unsigned int bpp = im->bits_per_pixel + (im->byte_order == MSBFirst ? 1 : 0);
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switch (bpp) {
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case 8: // 8bpp
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*dp++ = pixel;
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break;
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case 16: // 16bpp LSB
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*dp++ = pixel;
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*dp++ = pixel >> 8;
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break;
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case 17: // 16bpp MSB
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*dp++ = pixel >> 8;
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*dp++ = pixel;
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break;
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case 24: // 24bpp LSB
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*dp++ = pixel;
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*dp++ = pixel >> 8;
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*dp++ = pixel >> 16;
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break;
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case 25: // 24bpp MSB
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*dp++ = pixel >> 16;
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*dp++ = pixel >> 8;
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*dp++ = pixel;
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break;
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case 32: // 32bpp LSB
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*dp++ = pixel;
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*dp++ = pixel >> 8;
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*dp++ = pixel >> 16;
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*dp++ = pixel >> 24;
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break;
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case 33: // 32bpp MSB
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*dp++ = pixel >> 24;
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*dp++ = pixel >> 16;
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*dp++ = pixel >> 8;
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*dp++ = pixel;
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break;
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default:
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assert(false); // wtf?
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}
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}
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void TrueRenderControl::render(Widget *wi)
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{
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assert(wi);
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int w = wi->width(), h = wi->height();
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Pixmap p = XCreatePixmap(**display, wi->window(), w, h, _screen->depth());
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XImage *im = XCreateImage(**display, _screen->visual(), _screen->depth(),
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ZPixmap, 0, NULL, w, h, 32, 0);
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unsigned char *data = new unsigned char[im->bytes_per_line * h];
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unsigned char *dp = data;
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for (int y = 0; y < h/3; ++y)
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for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
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renderPixel(im, dp, _red_color_table[255*x/w] << _red_offset);
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for (int y = 0; y < h/3; ++y)
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for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
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renderPixel(im, dp, _green_color_table[255*x/w] << _green_offset);
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for (int y = 0; y < h/3; ++y)
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for (int x = 0; x < w; ++x, dp += im->bits_per_pixel/8)
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renderPixel(im, dp, _blue_color_table[255*x/w] << _blue_offset);
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printf("\nDone %d %d\n", im->bytes_per_line * h, dp - data);
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im->data = (char*) data;
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XPutImage(**display, p, DefaultGC(**display, _screen->screen()),
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im, 0, 0, 0, 0, w, h);
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//delete [] image->data;
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//image->data = NULL;
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XDestroyImage(im);
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XSetWindowBackgroundPixmap(**display, wi->window(), p);
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XClearWindow(**display, wi->window());
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XFreePixmap(**display, p);
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}
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}
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