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/* ScummVM - Scumm Interpreter
* GP32 Blitting library
* Copyright (C) 2001-2006 The ScummVM project
* Copyright (C) 2003,2004,2005 CARTIER Matthieu
* Copyright (C) 2005 Won Star - GP32 Backend
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $Header$
*
*/
//Some global variables and macros
#define screen_width 320
#define screen_height 240
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) {
int xmin, ymin, xmax, ymax;
int height2 = ( (height + 3) >> 2) << 2;
if(dx < 0) {
xmin = -dx;
} else xmin = 0;
if( (dx++ + width) > screen_width) {
xmax = screen_width - dx;
} else xmax = width - 1;
if(dy < 0) {
ymax = height + dy - 1;
} else ymax = height - 1;
if( (dy + height) > screen_height) {
ymin = dy + height - screen_height;
} else ymin = 0;
if( (xmin > xmax) || (ymin > ymax) ) return;
unsigned char *dst4 = framebuffer + (dx + xmax) * screen_height - height - dy + 1 + ymin;
src += (xmax * height2 + ymin);
ASMFastSolidBlit(src, dst4, xmax - xmin, ymax - ymin, height2, trans, coul);
}
//Copy from framebuffer to dest
void gp_SaveBitmap(void *framebuffer, int dx, const int dy, const int width, const int height, const unsigned char *dest) { //Sur l'icran
int xmin, ymin, xmax, ymax;
int height2 = ( (height + 3) >> 2) << 2;
if(dx < 0) {
xmin = -dx;
} else xmin = 0;
if( (dx++ + width) > screen_width) {
xmax = screen_width - dx;
} else xmax = width - 1;
if(dy < 0) {
ymax = height + dy - 1;
} else ymax = height - 1;
if( (dy + height) > screen_height) {
ymin = dy + height - screen_height;
} else ymin = 0;
if( (xmin > xmax) || (ymin > ymax) ) return;
unsigned char *src4 = framebuffer + (dx + xmax) * screen_height - height - dy + ymin;
dest += (xmin * height2 + ymin + 1);
ASMSaveBitmap(src4, dest, xmax - xmin, ymax - ymin, height2);
}
//Clears area with color #0, should not trigger clicky noise
void gp_FastClear(void *framebuffer, int dx, int dy, int width, int height) {
int xmin, ymin, xmax, ymax;
if(dx < 0) {
xmin = -dx;
} else xmin = 0;
if( (dx++ + width) > screen_width) {
xmax = screen_width - dx;
} else xmax = width - 1;
if(dy < 0) {
ymax = height + dy - 1;
} else ymax = height - 1;
if( (dy + height) > screen_height) {
ymin = dy + height - screen_height;
} else ymin = 0;
if( (xmin > xmax) || (ymin > ymax) ) return;
int decaly = screen_height - height - dy;
unsigned char *dst4 = framebuffer + (dx + xmax) * screen_height - height - dy + ymin;
ASMFastClear(dst4, xmax - xmin, ymax - ymin);
}
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