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Viewing changes to src/raster/raster-canvas.c

  • Committer: Bazaar Package Importer
  • Author(s): Zed Pobre
  • Date: 2004-08-26 13:35:51 UTC
  • mfrom: (1.1.1 upstream)
  • Revision ID: james.westby@ubuntu.com-20040826133551-gcje8j31q5cqgdq2
Tags: 1.14-3
Apply patch from Spiro Trikaliotis <vice@trikaliotis.net> to fix a
problem that some users were experiencing with a floating point
exception on startup related to the fullscreen option being enabled
during compile.

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src/raster/raster-canvas.c
 
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/*
 
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 * raster-canvas.c - Raster-based video chip emulation helper.
 
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 *
 
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 * Written by
 
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 *  Andreas Boose <viceteam@t-online.de>
 
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 *  Ettore Perazzoli <ettore@comm2000.it>
 
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 *
 
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 * This file is part of VICE, the Versatile Commodore Emulator.
 
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 * See README for copyright notice.
 
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 *
 
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 *  This program is free software; you can redistribute it and/or modify
 
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 *  it under the terms of the GNU General Public License as published by
 
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 *  the Free Software Foundation; either version 2 of the License, or
 
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 *  (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., 59 Temple Place, Suite 330, Boston, MA
 
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 *  02111-1307  USA.
 
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 *
 
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 */
 
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#include "vice.h"
 
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#include <stdio.h>
 
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#include "lib.h"
 
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#include "machine.h"
 
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#include "raster-canvas.h"
 
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#include "raster.h"
 
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#include "video.h"
 
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#include "videoarch.h"
 
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inline static void refresh_canvas(raster_t *raster)
 
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{
 
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    raster_canvas_area_t *update_area;
 
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    viewport_t *viewport;
 
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    int x, y, xx, yy;
 
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    int w, h;
 
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    update_area = raster->update_area;
 
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    viewport = raster->canvas->viewport;
 
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    if (update_area->is_null)
 
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        return;
 
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    x = update_area->xs;
 
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    y = update_area->ys;
 
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    xx = update_area->xs - viewport->first_x;
 
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    yy = update_area->ys - viewport->first_line;
 
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    w = update_area->xe - update_area->xs + 1;
 
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    h = update_area->ye - update_area->ys + 1;
 
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    if (video_render_get_fake_pal_state()) {
 
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        /* if pal emu is activated, more pixels have to be updated */
 
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        x -= 4;
 
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        xx -= 4;
 
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        w += 8;
 
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        h ++;
 
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    }
 
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    if (xx < 0) {
 
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        x -= xx;
 
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        w += xx;
 
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        xx = 0;
 
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    }
 
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    if (yy < 0) {
 
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        y -= yy;
 
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        h += yy;
 
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        yy = 0;
 
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    }
 
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    x += raster->canvas->geometry->extra_offscreen_border_left;
 
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    xx += viewport->x_offset;
 
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    yy += viewport->y_offset;
 
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    if ((int)(raster->canvas->draw_buffer->canvas_height) >= yy
 
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        && (int)(raster->canvas->draw_buffer->canvas_width) >= xx)
 
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        video_canvas_refresh(raster->canvas, x, y, xx, yy,
 
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            MIN(w, (int)(raster->canvas->draw_buffer->canvas_width - xx)),
 
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            MIN(h, (int)(raster->canvas->draw_buffer->canvas_height - yy)));
 
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    update_area->is_null = 1;
 
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}
 
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void raster_canvas_handle_end_of_frame(raster_t *raster)
 
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{
 
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    if (console_mode || vsid_mode)
 
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        return;
 
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    if (raster->skip_frame)
 
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        return;
 
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    if (!raster->canvas->viewport->update_canvas)
 
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        return;
 
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    if (raster->dont_cache)
 
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        video_canvas_refresh_all(raster->canvas);
 
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    else
 
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        refresh_canvas(raster);
 
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}
 
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void raster_canvas_init(raster_t *raster)
 
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{
 
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    raster->update_area = (raster_canvas_area_t *)lib_malloc(
 
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                          sizeof(raster_canvas_area_t));
 
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    raster->update_area->is_null = 1;
 
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}
 
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void raster_canvas_shutdown(raster_t *raster)
 
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{
 
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   lib_free(raster->update_area);
 
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}
 
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