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846 lines
18 KiB
C
846 lines
18 KiB
C
/* -*- c-basic-offset: 8 -*-
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rdesktop: A Remote Desktop Protocol client.
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Generics backingstore operations
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Copyright (C) Jay Sorg 2005-2006
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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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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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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "precomp.h"
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/* globals */
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static char * g_bs = 0;
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static int g_bs_size = 0;
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static int g_width1 = 800;
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static int g_height1 = 600;
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static int g_bpp = 8;
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static int g_Bpp = 1;
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static int g_clip_left1 = 0;
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static int g_clip_top1 = 0;
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static int g_clip_right1 = 800;
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static int g_clip_bottom1 = 600;
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/* for bs_patblt */
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static char g_hatch_patterns[] =
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{
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0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, /* 0 - bsHorizontal */
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0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, /* 1 - bsVertical */
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0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01, /* 2 - bsFDiagonal */
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0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, /* 3 - bsBDiagonal */
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0x08, 0x08, 0x08, 0xff, 0x08, 0x08, 0x08, 0x08, /* 4 - bsCross */
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0x81, 0x42, 0x24, 0x18, 0x18, 0x24, 0x42, 0x81 /* 5 - bsDiagCross */
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};
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/*****************************************************************************/
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/* do a raster op */
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int
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bs_do_rop(int rop, int src, int dst)
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{
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switch (rop)
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{
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case 0x0: return 0;
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case 0x1: return ~(src | dst);
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case 0x2: return (~src) & dst;
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case 0x3: return ~src;
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case 0x4: return src & (~dst);
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case 0x5: return ~(dst);
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case 0x6: return src ^ dst;
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case 0x7: return ~(src & dst);
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case 0x8: return src & dst;
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case 0x9: return ~(src) ^ dst;
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case 0xa: return dst;
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case 0xb: return (~src) | dst;
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case 0xc: return src;
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case 0xd: return src | (~dst);
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case 0xe: return src | dst;
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case 0xf: return ~0;
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}
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return dst;
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}
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/*****************************************************************************/
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/* get a pixel from the in memory copy of whats on the screen */
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int
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bs_get_pixel(int x, int y)
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{
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char * p;
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if (x >= 0 && x < g_width1 && y >= 0 && y < g_height1)
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{
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p = g_bs + (y * g_width1 * g_Bpp) + (x * g_Bpp);
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if (g_Bpp == 1)
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{
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return *((unsigned char *) p);
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}
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else if (g_Bpp == 2)
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{
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return *((unsigned short *) p);
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}
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else
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{
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return *((unsigned int *) p);
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}
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}
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else
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{
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return 0;
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}
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}
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/*****************************************************************************/
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/* set a pixel on the screen using the clip */
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void
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bs_set_pixel(int x, int y, int pixel, int rop, int use_clip)
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{
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char * p;
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if (!use_clip ||
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(x >= g_clip_left1 && x < g_clip_right1 &&
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y >= g_clip_top1 && y < g_clip_bottom1))
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{
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if (x >= 0 && x < g_width1 && y >= 0 && y < g_height1)
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{
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p = g_bs + (y * g_width1 * g_Bpp) + (x * g_Bpp);
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if (rop != 12)
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{
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pixel = bs_do_rop(rop, pixel, bs_get_pixel(x, y));
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}
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if (g_Bpp == 1)
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{
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*((unsigned char *) p) = pixel;
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}
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else if (g_Bpp == 2)
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{
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*((unsigned short *) p) = pixel;
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}
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else
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{
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*((unsigned int *) p) = pixel;
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}
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}
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}
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}
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/*****************************************************************************/
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static char *
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get_bs_ptr(int x, int y)
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{
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char * p;
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if (x >= 0 && x < g_width1 && y >= 0 && y < g_height1)
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{
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p = g_bs + (y * g_width1 * g_Bpp) + (x * g_Bpp);
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return p;
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}
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else
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{
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return 0;
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}
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}
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/*****************************************************************************/
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void
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bs_init(int width, int height, int bpp)
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{
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if (g_bs != 0)
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{
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free(g_bs);
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}
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g_width1 = width;
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g_height1 = height;
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g_bpp = bpp;
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g_Bpp = (bpp + 7) / 8;
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g_bs_size = width * height * g_Bpp;
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g_bs = malloc(g_bs_size);
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memset(g_bs, 0, g_bs_size);
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g_clip_left1 = 0;
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g_clip_top1 = 0;
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g_clip_right1 = width;
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g_clip_bottom1 = height;
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}
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/*****************************************************************************/
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void
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bs_exit(void)
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{
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if (g_bs != 0)
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{
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free(g_bs);
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}
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}
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/*****************************************************************************/
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void
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bs_set_clip(int x, int y, int cx, int cy)
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{
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g_clip_left1 = x;
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g_clip_top1 = y;
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g_clip_right1 = x + cx;
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g_clip_bottom1 = y + cy;
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}
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/*****************************************************************************/
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void
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bs_reset_clip(void)
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{
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g_clip_left1 = 0;
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g_clip_top1 = 0;
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g_clip_right1 = g_width1;
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g_clip_bottom1 = g_height1;
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}
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/*****************************************************************************/
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/* check if a certain pixel is set in a bitmap */
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int
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bs_is_pixel_on(char * data, int x, int y, int width, int bpp)
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{
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int start;
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int shift;
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if (bpp == 1)
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{
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width = (width + 7) / 8;
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start = (y * width) + x / 8;
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shift = x % 8;
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return (data[start] & (0x80 >> shift)) != 0;
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}
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else if (bpp == 8)
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{
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return data[y * width + x] != 0;
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}
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else if (bpp == 15 || bpp == 16)
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{
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return data[(y * 2) * width + (x * 2)] != 0 ||
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data[(y * 2) * width + (x * 2) + 1] != 0;
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}
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else if (bpp == 24 || bpp == 32)
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{
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return data[(y * 4) * width + (x * 4)] != 0 ||
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data[(y * 4) * width + (x * 4) + 1] != 0 ||
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data[(y * 4) * width + (x * 4) + 2] != 0 ||
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data[(y * 4) * width + (x * 4) + 3] != 0;
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}
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else
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{
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return 0;
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}
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}
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/*****************************************************************************/
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void
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bs_set_pixel_on(char * data, int x, int y, int width, int bpp,
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int pixel)
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{
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int start;
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int shift;
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if (bpp == 1)
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{
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width = (width + 7) / 8;
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start = (y * width) + x / 8;
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shift = x % 8;
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if (pixel != 0)
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{
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data[start] = data[start] | (0x80 >> shift);
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}
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else
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{
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data[start] = data[start] & ~(0x80 >> shift);
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}
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}
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else if (bpp == 8)
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{
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data[y * width + x] = pixel;
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}
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else if (bpp == 15 || bpp == 16)
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{
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((unsigned short *) data)[y * width + x] = pixel;
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}
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else if (bpp == 24 || bpp == 32)
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{
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((unsigned int *) data)[y * width + x] = (unsigned int) pixel;
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}
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}
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/*****************************************************************************/
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void
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bs_copy_mem(char * d, char * s, int n)
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{
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while (n & (~7))
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{
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*(d++) = *(s++);
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*(d++) = *(s++);
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*(d++) = *(s++);
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*(d++) = *(s++);
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*(d++) = *(s++);
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*(d++) = *(s++);
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*(d++) = *(s++);
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*(d++) = *(s++);
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n = n - 8;
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}
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while (n > 0)
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{
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*(d++) = *(s++);
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n--;
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}
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}
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/*****************************************************************************/
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void
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bs_copy_memb(char * d, char * s, int n)
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{
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d = (d + n) - 1;
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s = (s + n) - 1;
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while (n & (~7))
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{
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*(d--) = *(s--);
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*(d--) = *(s--);
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*(d--) = *(s--);
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*(d--) = *(s--);
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*(d--) = *(s--);
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*(d--) = *(s--);
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*(d--) = *(s--);
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*(d--) = *(s--);
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n = n - 8;
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}
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while (n > 0)
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{
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*(d--) = *(s--);
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n--;
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}
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}
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/*****************************************************************************/
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/* return true is the is something to draw */
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int
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bs_warp_coords(int * x, int * y, int * cx, int * cy,
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int * srcx, int * srcy)
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{
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int dx;
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int dy;
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if (g_clip_left1 > *x)
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{
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dx = g_clip_left1 - *x;
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}
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else
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{
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dx = 0;
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}
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if (g_clip_top1 > *y)
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{
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dy = g_clip_top1 - *y;
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}
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else
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{
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dy = 0;
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}
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if (*x + *cx > g_clip_right1)
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{
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*cx = (*cx - ((*x + *cx) - g_clip_right1));
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}
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if (*y + *cy > g_clip_bottom1)
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{
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*cy = (*cy - ((*y + *cy) - g_clip_bottom1));
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}
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*cx = *cx - dx;
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*cy = *cy - dy;
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if (*cx <= 0)
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{
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return 0;
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}
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if (*cy <= 0)
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{
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return 0;
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}
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*x = *x + dx;
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*y = *y + dy;
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if (srcx != 0)
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{
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*srcx = *srcx + dx;
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}
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if (srcy != 0)
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{
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*srcy = *srcy + dy;
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}
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return 1;
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}
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/*****************************************************************************/
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void
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bs_rect(int x, int y, int cx, int cy, int colour, int rop)
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{
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int i;
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int j;
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unsigned char * p8;
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unsigned short * p16;
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unsigned int * p32;
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if (bs_warp_coords(&x, &y, &cx, &cy, 0, 0))
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{
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if (rop == 0) /* black */
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{
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rop = 12;
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colour = 0;
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}
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else if (rop == 15) /* white */
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{
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rop = 12;
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colour = 0xffffff;
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}
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if (rop == 12) /* copy */
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{
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if (g_Bpp == 1)
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{
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for (i = 0; i < cy; i++)
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{
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p8 = (unsigned char *) get_bs_ptr(x, y + i);
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if (p8 != 0)
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{
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for (j = 0; j < cx; j++)
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{
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*p8 = colour;
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p8++;
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}
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}
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}
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}
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else if (g_Bpp == 2)
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{
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for (i = 0; i < cy; i++)
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{
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p16 = (unsigned short *) get_bs_ptr(x, y + i);
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if (p16 != 0)
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{
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for (j = 0; j < cx; j++)
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{
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*p16 = colour;
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p16++;
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}
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}
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}
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}
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else
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{
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for (i = 0; i < cy; i++)
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{
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p32 = (unsigned int *) get_bs_ptr(x, y + i);
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if (p32 != 0)
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{
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for (j = 0; j < cx; j++)
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{
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*p32 = colour;
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p32++;
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}
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}
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}
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}
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}
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else /* slow */
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{
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for (i = 0; i < cy; i++)
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{
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for (j = 0; j < cx; j++)
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{
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bs_set_pixel(j + x, i + y, colour, rop, 0);
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}
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}
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}
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}
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}
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/*****************************************************************************/
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void
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bs_screenblt(int rop, int x, int y, int cx, int cy,
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int srcx, int srcy)
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{
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int p;
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int i;
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int j;
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char * src;
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char * dst;
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if (bs_warp_coords(&x, &y, &cx, &cy, &srcx, &srcy))
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{
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if (rop == 12) /* copy */
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{
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if (srcy < y) /* copy down - bottom to top */
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{
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for (i = cy - 1; i >= 0; i--)
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{
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src = get_bs_ptr(srcx, srcy + i);
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dst = get_bs_ptr(x, y + i);
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if (src != 0 && dst != 0)
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{
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bs_copy_mem(dst, src, cx * g_Bpp);
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}
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}
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}
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else if (srcy > y || srcx > x) /* copy up or left - top to bottom */
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{
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for (i = 0; i < cy; i++)
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{
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src = get_bs_ptr(srcx, srcy + i);
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dst = get_bs_ptr(x, y + i);
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if (src != 0 && dst != 0)
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{
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bs_copy_mem(dst, src, cx * g_Bpp);
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}
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}
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}
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else /* copy straight right */
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{
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for (i = 0; i < cy; i++)
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{
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src = get_bs_ptr(srcx, srcy + i);
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dst = get_bs_ptr(x, y + i);
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if (src != 0 && dst != 0)
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{
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bs_copy_memb(dst, src, cx * g_Bpp);
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}
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}
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}
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}
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else /* slow */
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{
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if (srcy < y) /* copy down - bottom to top */
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{
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for (i = cy - 1; i >= 0; i--)
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{
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for (j = 0; j < cx; j++)
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{
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p = bs_get_pixel(srcx + j, srcy + i);
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bs_set_pixel(x + j, y + i, p, rop, 0);
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}
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}
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}
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else if (srcy > y || srcx > x) /* copy up or left - top to bottom */
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{
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for (i = 0; i < cy; i++)
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{
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for (j = 0; j < cx; j++)
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{
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p = bs_get_pixel(srcx + j, srcy + i);
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bs_set_pixel(x + j, y + i, p, rop, 0);
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}
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}
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}
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else /* copy straight right */
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{
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for (i = 0; i < cy; i++)
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{
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for (j = cx - 1; j >= 0; j--)
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{
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p = bs_get_pixel(srcx + j, srcy + i);
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bs_set_pixel(x + j, y + i, p, rop, 0);
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}
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}
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}
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}
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}
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}
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/*****************************************************************************/
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void
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bs_memblt(int opcode, int x, int y, int cx, int cy,
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void * srcdata, int srcwidth, int srcheight,
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int srcx, int srcy)
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{
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int i;
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int j;
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int p;
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char * dst;
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char * src;
|
|
|
|
if (bs_warp_coords(&x, &y, &cx, &cy, &srcx, &srcy))
|
|
{
|
|
if (opcode == 12) /* copy */
|
|
{
|
|
if (g_Bpp == 1)
|
|
{
|
|
src = (char *) (((unsigned char *) srcdata) + srcy * srcwidth + srcx);
|
|
}
|
|
else if (g_Bpp == 2)
|
|
{
|
|
src = (char *) (((unsigned short *) srcdata) + srcy * srcwidth + srcx);
|
|
}
|
|
else
|
|
{
|
|
src = (char *) (((unsigned int *) srcdata) + srcy * srcwidth + srcx);
|
|
}
|
|
for (i = 0; i < cy; i++)
|
|
{
|
|
dst = get_bs_ptr(x, y + i);
|
|
if (dst != 0)
|
|
{
|
|
bs_copy_mem(dst, src, cx * g_Bpp);
|
|
src += srcwidth * g_Bpp;
|
|
}
|
|
}
|
|
}
|
|
else /* slow */
|
|
{
|
|
if (g_Bpp == 1)
|
|
{
|
|
for (i = 0; i < cy; i++)
|
|
{
|
|
for (j = 0; j < cx; j++)
|
|
{
|
|
p = *(((unsigned char *) srcdata) +
|
|
((i + srcy) * srcwidth + (j + srcx)));
|
|
bs_set_pixel(x + j, y + i, p, opcode, 0);
|
|
}
|
|
}
|
|
}
|
|
else if (g_Bpp == 2)
|
|
{
|
|
for (i = 0; i < cy; i++)
|
|
{
|
|
for (j = 0; j < cx; j++)
|
|
{
|
|
p = *(((unsigned short *) srcdata) +
|
|
((i + srcy) * srcwidth + (j + srcx)));
|
|
bs_set_pixel(x + j, y + i, p, opcode, 0);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (i = 0; i < cy; i++)
|
|
{
|
|
for (j = 0; j < cx; j++)
|
|
{
|
|
p = *(((unsigned int *) srcdata) +
|
|
((i + srcy) * srcwidth + (j + srcx)));
|
|
bs_set_pixel(x + j, y + i, p, opcode, 0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
void
|
|
bs_draw_glyph(int x, int y, char * glyph_data, int glyph_width,
|
|
int glyph_height, int fgcolour)
|
|
{
|
|
int i;
|
|
int j;
|
|
|
|
for (i = 0; i < glyph_height; i++)
|
|
{
|
|
for (j = 0; j < glyph_width; j++)
|
|
{
|
|
if (bs_is_pixel_on(glyph_data, j, i, glyph_width, 8))
|
|
{
|
|
bs_set_pixel(x + j, y + i, fgcolour, 12, 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* Bresenham's line drawing algorithm */
|
|
void
|
|
bs_line(int opcode, int startx, int starty, int endx, int endy,
|
|
int pen_width, int pen_style, int pen_colour)
|
|
{
|
|
int dx;
|
|
int dy;
|
|
int incx;
|
|
int incy;
|
|
int dpr;
|
|
int dpru;
|
|
int p;
|
|
|
|
if (startx > endx)
|
|
{
|
|
dx = startx - endx;
|
|
incx = -1;
|
|
}
|
|
else
|
|
{
|
|
dx = endx - startx;
|
|
incx = 1;
|
|
}
|
|
if (starty > endy)
|
|
{
|
|
dy = starty - endy;
|
|
incy = -1;
|
|
}
|
|
else
|
|
{
|
|
dy = endy - starty;
|
|
incy = 1;
|
|
}
|
|
if (dx >= dy)
|
|
{
|
|
dpr = dy << 1;
|
|
dpru = dpr - (dx << 1);
|
|
p = dpr - dx;
|
|
for (; dx >= 0; dx--)
|
|
{
|
|
if (startx != endx || starty != endy)
|
|
{
|
|
bs_set_pixel(startx, starty, pen_colour, opcode, 1);
|
|
}
|
|
if (p > 0)
|
|
{
|
|
startx += incx;
|
|
starty += incy;
|
|
p += dpru;
|
|
}
|
|
else
|
|
{
|
|
startx += incx;
|
|
p += dpr;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dpr = dx << 1;
|
|
dpru = dpr - (dy << 1);
|
|
p = dpr - dy;
|
|
for (; dy >= 0; dy--)
|
|
{
|
|
if (startx != endx || starty != endy)
|
|
{
|
|
bs_set_pixel(startx, starty, pen_colour, opcode, 1);
|
|
}
|
|
if (p > 0)
|
|
{
|
|
startx += incx;
|
|
starty += incy;
|
|
p += dpru;
|
|
}
|
|
else
|
|
{
|
|
starty += incy;
|
|
p += dpr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
void
|
|
bs_patblt(int opcode, int x, int y, int cx, int cy,
|
|
int brush_style, char * brush_pattern,
|
|
int brush_x_org, int brush_y_org,
|
|
int bgcolour, int fgcolour)
|
|
{
|
|
int i;
|
|
int j;
|
|
char ipattern[8];
|
|
char * b;
|
|
|
|
b = 0;
|
|
switch (brush_style)
|
|
{
|
|
case 0:
|
|
bs_rect(x, y, cx, cy, fgcolour, opcode);
|
|
break;
|
|
case 2: /* Hatch */
|
|
b = g_hatch_patterns + brush_pattern[0] * 8;
|
|
break;
|
|
case 3:
|
|
for (i = 0; i < 8; i++)
|
|
{
|
|
ipattern[i] = ~brush_pattern[7 - i];
|
|
}
|
|
b = ipattern;
|
|
break;
|
|
}
|
|
if (b != 0)
|
|
{
|
|
for (i = 0; i < cy; i++)
|
|
{
|
|
for (j = 0; j < cx; j++)
|
|
{
|
|
if (bs_is_pixel_on(b, (x + j + brush_x_org) % 8,
|
|
(y + i + brush_y_org) % 8, 8, 1))
|
|
{
|
|
bs_set_pixel(x + j, y + i, fgcolour, opcode, 1);
|
|
}
|
|
else
|
|
{
|
|
bs_set_pixel(x + j, y + i, bgcolour, opcode, 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
void
|
|
bs_copy_box(char * dst, int x, int y, int cx, int cy, int line_size)
|
|
{
|
|
char * src;
|
|
int i;
|
|
|
|
/* shouldn't happen */
|
|
if (cx < 1 || cy < 1)
|
|
{
|
|
return;
|
|
}
|
|
/* nothing to draw, memset and leave */
|
|
if (x + cx < 0 || y + cy < 0 || x >= g_width1 || y >= g_height1)
|
|
{
|
|
memset(dst, 0, cx * cy * g_Bpp);
|
|
return;
|
|
}
|
|
/* check if it goes over an edge */
|
|
if (x < 0 || y < 0 || x + cx > g_width1 || y + cy > g_height1)
|
|
{
|
|
memset(dst, 0, cx * cy * g_Bpp);
|
|
if (x < 0)
|
|
{
|
|
cx += x;
|
|
dst += -x * g_Bpp;
|
|
x = 0;
|
|
}
|
|
if (x + cx > g_width1)
|
|
{
|
|
cx = g_width1 - x;
|
|
}
|
|
for (i = 0; i < cy; i++)
|
|
{
|
|
src = get_bs_ptr(x, y + i);
|
|
if (src != 0)
|
|
{
|
|
bs_copy_mem(dst, src, cx * g_Bpp);
|
|
}
|
|
dst += line_size;
|
|
}
|
|
}
|
|
else /* whole box is within */
|
|
{
|
|
for (i = 0; i < cy; i++)
|
|
{
|
|
src = get_bs_ptr(x, y + i);
|
|
if (src != 0)
|
|
{
|
|
bs_copy_mem(dst, src, cx * g_Bpp);
|
|
}
|
|
dst += line_size;
|
|
}
|
|
}
|
|
}
|