159 lines
3.8 KiB
C++
159 lines
3.8 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 "surface.hh"
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#include "rendertexture.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(int screen)
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: RenderControl(screen),
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_red_offset(0),
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_green_offset(0),
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_blue_offset(0)
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{
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printf("Initializing TrueColor RenderControl\n");
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Visual *visual = display->screenInfo(_screen)->visual();
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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 = visual->red_mask;
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green_mask = visual->green_mask;
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blue_mask = 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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_red_shift = _green_shift = _blue_shift = 8;
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while (red_mask) { red_mask >>= 1; _red_shift--; }
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while (green_mask) { green_mask >>= 1; _green_shift--; }
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while (blue_mask) { blue_mask >>= 1; _blue_shift--; }
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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::drawGradientBackground(
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Surface &sf, const RenderTexture &texture) const
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{
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int w = sf.width(), h = sf.height();
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const ScreenInfo *info = display->screenInfo(_screen);
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XImage *im = XCreateImage(**display, info->visual(), info->depth(),
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ZPixmap, 0, NULL, w, h, 32, 0);
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pixel32 *data = new pixel32[sf.height()*sf.width()];
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pixel32 current;
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pixel32 *dp = data;
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float dr, dg, db;
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unsigned int r,g,b;
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dr = (float)(texture.secondary_color().red() - texture.color().red());
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dr/= (float)sf.height();
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dg = (float)(texture.secondary_color().green() - texture.color().green());
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dg/= (float)sf.height();
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db = (float)(texture.secondary_color().blue() - texture.color().blue());
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db/= (float)sf.height();
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for (int y = 0; y < h; ++y) {
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r = texture.color().red() + (int)(dr * y);
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g = texture.color().green() + (int)(dg * y);
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b = texture.color().blue() + (int)(db * y);
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current = (r << 16)
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+ (g << 8)
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+ b;
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for (int x = 0; x < w; ++x, dp ++)
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*dp = current;
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}
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im->data = (char*) data;
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sf.setPixmap(im);
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delete [] im->data;
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im->data = NULL;
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XDestroyImage(im);
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}
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void TrueRenderControl::drawBackground(Surface& sf,
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const RenderTexture &texture) const
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{
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assert(_screen == sf._screen);
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assert(_screen == texture.color().screen());
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if (texture.gradient() == RenderTexture::Solid) {
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drawSolidBackground(sf, texture);
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} else {
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drawGradientBackground(sf, texture);
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}
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}
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}
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