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- Committer: sirver
- Date: 2002-02-05 20:54:08 UTC
- Revision ID: git-v1:df384fd3a5e53be1f37803d1c0381fa993844bf5
Initial revision
git-svn-id: https://widelands.svn.sourceforge.net/svnroot/widelands/trunk@2 37b2a8de-5219-0410-9f54-a31bc463ab9c
git-svn-id: https://widelands.svn.sourceforge.net/svnroot/widelands/trunk@2 37b2a8de-5219-0410-9f54-a31bc463ab9c
- files added:
- AUTHORS
- src
added
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src/graphic.cc
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/*
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* Copyright (C) 2001 by Holger Rapp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include "graphic.h"
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//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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namespace Graph {
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/** class Graphic
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*
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* This functions is responsible for displaying graphics and keeping them up to date
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*
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* It's little strange in it's interface, but it is optimzed for speed, not beauty
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* This is a singleton
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*/
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/** Graphic::Graphic(void)
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*
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* Default Constructor. Simple Inits
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*
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* Args: none
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* Returns: nothing
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*/
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Graphic::Graphic(void) {
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lpix=0;
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sc=NULL;
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pixels=NULL;
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xres=yres=0;
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st=NOT_INIT;
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bis_fs=0;
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SDL_Init(SDL_INIT_VIDEO);
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}
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/** Graphic::~Graphic(void)
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*
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* simple cleanups.
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*
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* Args: none
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* Returns: nothing
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*/
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Graphic::~Graphic(void) {
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lpix=0;
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if(sc) {
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SDL_FreeSurface(sc);
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sc=NULL;
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}
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pixels=NULL;
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xres=yres=0;
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st=NOT_INIT;
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SDL_Quit();
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}
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/** void Graphic::set_mode(const unsigned short x, const unsigned short y, const Mode m)
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*
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* This function sets a new graphics mode.
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*
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* Args: x x resolution
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* y y resolution
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* m either windows or fullscreen
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* Returns: Nothing
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*/
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void Graphic::set_mode(const unsigned short x, const unsigned short y, const Mode m) {
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if(sc)
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SDL_FreeSurface(sc);
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if(m==MODE_FS) {
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sc = SDL_SetVideoMode(x, y, 16, SDL_SWSURFACE | SDL_FULLSCREEN);
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bis_fs=1;
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} else {
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sc = SDL_SetVideoMode(x, y, 16, SDL_SWSURFACE);
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bis_fs=0;
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}
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xres=x;
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yres=y;
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pixels=(unsigned short*) sc->pixels;
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st=OK;
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return;
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}
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/** void Graphic::update_screen(void);
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*
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* This updates the whole screen
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*
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* Args: None
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* Returns: Nothing
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*/
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void Graphic::update_screen(void) {
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if(!sc) {
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st=ERROR;
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return;
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}
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SDL_UpdateRect(sc, 0, 0, xres, yres);
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}
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/** void Graphic::update_rect(const unsigned short x, const unsigned short y, const unsigned short w, const unsigned short h);
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*
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* This updates a rect of the screen
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*
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* Args: x upper left corner of rect
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* y upper left corner of rect
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* w width
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* h height
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*/
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void Graphic::update_rect(const unsigned short x, const unsigned short y, const unsigned short w, const unsigned short h) {
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if(!sc) {
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st=ERROR;
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return;
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}
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SDL_UpdateRect(sc, x, y, w, h);
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}
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/** void Graphic::update_quarter(void)
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*
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* This function updates a bit of the screen, but this bit moves around each time
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* this function gets called.
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* So it's made sure, that the whole screen gets updated, when this function gets called
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* every frame
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*
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* Args: none
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* Returns: Nothing
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*/
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void Graphic::update_quarter(void) {
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static unsigned int x;
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static unsigned int y;
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static unsigned int xadd=xres/4;
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static unsigned int yadd=yres/4;
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if(x==xres) { x=0; y+=yadd; }
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if(y==yres) y=0;
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SDL_UpdateRect(sc, x, y, xadd, yadd);
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x+=xadd;
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}
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/** void draw_pic(Pic* p, const unsigned short d_x_pos, const unsigned short d_y_pos, const unsigned short p_x_pos,
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* const unsigned short p_y_pos, const unsigned short i_w, const unsigned short i_h)
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*
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* This functions plots a picture onto the current screen
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*
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* friend to class pic and class Graphic
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*
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* Args: p picture to plot
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* d_x_pos xpos on screen
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* d_y_pos ypos on screen
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* p_x_pos start xpos in picture
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* p_y_pos start ypos in picture
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* i_w width
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* i_h height
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* returns: Nothing
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*/
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void draw_pic(Pic* p, const unsigned short d_x_pos, const unsigned short d_y_pos, const unsigned short p_x_pos, const unsigned short p_y_pos,
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const unsigned short i_w, const unsigned short i_h) {
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unsigned short clr;
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unsigned short w=i_w;
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unsigned short h=i_h;
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if(d_x_pos+w>g_gr.get_xres()) w=g_gr.get_xres()-d_x_pos;
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if(d_y_pos+h>g_gr.get_yres()) h=g_gr.get_yres()-d_y_pos;
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if(p->has_clrkey()) {
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// Slow blit, checking for clrkeys. This could probably speed up by copying
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// 2 pixels (==4bytes==register width)
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// in one rush. But this is a nontrivial task
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for(unsigned long y=0; y<h; y++) {
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clr=p->get_pixel(p_x_pos, p_y_pos+y);
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if(clr != p->get_clrkey()) g_gr.set_pixel(d_x_pos, d_y_pos+y, clr);
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else g_gr.set_cpixel(d_x_pos, d_y_pos+y);
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for(unsigned long x=1; x<w; x++) {
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clr=p->get_npixel();
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if(clr != p->get_clrkey()) g_gr.set_npixel(clr);
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else g_gr.npixel();
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}
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}
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} else {
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unsigned long poffs=p->get_w()*p_y_pos + p_x_pos;
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unsigned long doffs=g_gr.get_xres()*d_y_pos + d_x_pos;
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// fast blitting, using memcpy
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for(unsigned long y=0; y<h; y++) {
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memcpy(g_gr.pixels+doffs, p->pixels+poffs, w<<1); // w*sizeof(short)
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doffs+=g_gr.get_xres();
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poffs+=p->get_w();
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}
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}
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}
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/** void copy_pic(Pic* dst, Pic* src, const unsigned short d_x_pos, const unsigned short d_y_pos, const unsigned short p_x_pos,
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* const unsigned short p_y_pos, const unsigned short i_w, const unsigned short i_h)
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*
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* This functions plots a picture into an other
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*
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* friend to class pic
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*
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* Args: src picture to plot
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* dst picture to plot inside
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* d_x_pos xpos on screen
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* d_y_pos ypos on screen
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* p_x_pos start xpos in picture
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* p_y_pos start ypos in picture
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* i_w width
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* i_h height
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* returns: Nothing
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*/
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void copy_pic(Pic* dst, Pic* src, const unsigned short d_x_pos, const unsigned short d_y_pos, const unsigned short p_x_pos,
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const unsigned short p_y_pos, const unsigned short i_w, const unsigned short i_h) {
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unsigned short clr;
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unsigned short w=i_w;
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unsigned short h=i_h;
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if(d_x_pos+w>g_gr.get_xres()) w=g_gr.get_xres()-d_x_pos;
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if(d_y_pos+h>g_gr.get_yres()) h=g_gr.get_yres()-d_y_pos;
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if(src->has_clrkey() && (dst->get_clrkey()!=src->get_clrkey())) {
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for(unsigned long y=0; y<h; y++) {
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clr=src->get_pixel(p_x_pos, p_y_pos+y);
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dst->set_pixel(d_x_pos, d_y_pos+y, clr);
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for(unsigned long x=1; x<w; x++) {
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clr=src->get_npixel();
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dst->set_npixel(clr);
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}
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}
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} else {
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unsigned long soffs=src->get_w()*p_y_pos + p_x_pos;
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unsigned long doffs=dst->get_w()*d_y_pos + d_x_pos;
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// fast blitting, using memcpy
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for(unsigned long y=0; y<h; y++) {
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memcpy(dst->pixels+doffs, src->pixels+soffs, w<<1); // w*sizeof(short)
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doffs+=dst->get_w();
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soffs+=src->get_w();
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}
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}
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}
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}
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