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102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/* ScummVM - Scumm Interpreter
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* GP32 Blitting library
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* Copyright (C) 2001-2006 The ScummVM project
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* Copyright (C) 2003,2004,2005 CARTIER Matthieu
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* Copyright (C) 2005 Won Star - GP32 Backend
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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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* 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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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//Some global variables and macros
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#define screen_width 320
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#define screen_height 240
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void gp_FastSolidBlit(void *framebuffer, int dx, const int dy, const int width, const int height, const unsigned char *src, const int trans, const int coul) {
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int xmin, ymin, xmax, ymax;
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int height2 = ( (height + 3) >> 2) << 2;
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if(dx < 0) {
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xmin = -dx;
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} else xmin = 0;
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if( (dx++ + width) > screen_width) {
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xmax = screen_width - dx;
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} else xmax = width - 1;
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if(dy < 0) {
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ymax = height + dy - 1;
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} else ymax = height - 1;
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if( (dy + height) > screen_height) {
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ymin = dy + height - screen_height;
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} else ymin = 0;
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if( (xmin > xmax) || (ymin > ymax) ) return;
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unsigned char *dst4 = framebuffer + (dx + xmax) * screen_height - height - dy + 1 + ymin;
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src += (xmax * height2 + ymin);
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ASMFastSolidBlit(src, dst4, xmax - xmin, ymax - ymin, height2, trans, coul);
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}
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//Copy from framebuffer to dest
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void gp_SaveBitmap(void *framebuffer, int dx, const int dy, const int width, const int height, const unsigned char *dest) { //Sur l'icran
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int xmin, ymin, xmax, ymax;
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int height2 = ( (height + 3) >> 2) << 2;
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if(dx < 0) {
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xmin = -dx;
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} else xmin = 0;
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if( (dx++ + width) > screen_width) {
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xmax = screen_width - dx;
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} else xmax = width - 1;
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if(dy < 0) {
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ymax = height + dy - 1;
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} else ymax = height - 1;
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if( (dy + height) > screen_height) {
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ymin = dy + height - screen_height;
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} else ymin = 0;
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if( (xmin > xmax) || (ymin > ymax) ) return;
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unsigned char *src4 = framebuffer + (dx + xmax) * screen_height - height - dy + ymin;
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dest += (xmin * height2 + ymin + 1);
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ASMSaveBitmap(src4, dest, xmax - xmin, ymax - ymin, height2);
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}
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//Clears area with color #0, should not trigger clicky noise
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void gp_FastClear(void *framebuffer, int dx, int dy, int width, int height) {
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int xmin, ymin, xmax, ymax;
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if(dx < 0) {
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xmin = -dx;
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} else xmin = 0;
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if( (dx++ + width) > screen_width) {
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xmax = screen_width - dx;
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} else xmax = width - 1;
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if(dy < 0) {
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ymax = height + dy - 1;
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} else ymax = height - 1;
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if( (dy + height) > screen_height) {
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ymin = dy + height - screen_height;
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} else ymin = 0;
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if( (xmin > xmax) || (ymin > ymax) ) return;
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int decaly = screen_height - height - dy;
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unsigned char *dst4 = framebuffer + (dx + xmax) * screen_height - height - dy + ymin;
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ASMFastClear(dst4, xmax - xmin, ymax - ymin);
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}
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