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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 Dan Everton
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <SDL.h>
#include "lcd-sdl.h"
#include "sim-ui-defines.h"
#include "system.h" /* for MIN() and MAX() */
int display_zoom = 1;
void sdl_update_rect(SDL_Surface *surface, int x_start, int y_start, int width,
int height, int max_x, int max_y,
unsigned long (*getpixel)(int, int))
{
int x, y;
int xmax, ymax;
SDL_Rect dest;
ymax = y_start + height;
xmax = x_start + width;
if(xmax > max_x)
xmax = max_x;
if(ymax >= max_y)
ymax = max_y;
SDL_LockSurface(surface);
dest.w = display_zoom;
dest.h = display_zoom;
for (x = x_start; x < xmax; x++) {
dest.x = x * display_zoom;
#ifdef HAVE_LCD_SPLIT
for (y = y_start; y < MIN(ymax, LCD_SPLIT_POS); y++) {
dest.y = y * display_zoom;
SDL_FillRect(surface, &dest, (Uint32)(getpixel(x, y) | 0x80));
}
for (y = MAX(y_start, LCD_SPLIT_POS); y < ymax; y++) {
dest.y = (y + LCD_SPLIT_LINES) * display_zoom ;
SDL_FillRect(surface, &dest, (Uint32)getpixel(x, y));
}
#else
for (y = y_start; y < ymax; y++) {
dest.y = y * display_zoom;
SDL_FillRect(surface, &dest, (Uint32)getpixel(x, y));
}
#endif
}
SDL_UnlockSurface(surface);
}
void sdl_gui_update(SDL_Surface *surface, int x_start, int y_start, int width,
int height, int max_x, int max_y, int ui_x, int ui_y)
{
if (x_start + width > max_x)
width = max_x - x_start;
if (y_start + height > max_y)
height = max_y - y_start;
SDL_Rect src = {x_start * display_zoom, y_start * display_zoom,
width * display_zoom, height * display_zoom};
SDL_Rect dest= {(ui_x + x_start) * display_zoom,
(ui_y + y_start) * display_zoom,
width * display_zoom, height * display_zoom};
if (surface->flags & SDL_SRCALPHA) /* alpha needs a black background */
SDL_FillRect(gui_surface, &dest, 0);
SDL_BlitSurface(surface, &src, gui_surface, &dest);
SDL_Flip(gui_surface);
}
/* set a range of bitmap indices to a gradient from startcolour to endcolour */
void sdl_set_gradient(SDL_Surface *surface, SDL_Color *start, SDL_Color *end,
int first, int steps)
{
int i;
SDL_Color palette[steps];
for (i = 0; i < steps; i++) {
palette[i].r = start->r + (end->r - start->r) * i / (steps - 1);
palette[i].g = start->g + (end->g - start->g) * i / (steps - 1);
palette[i].b = start->b + (end->b - start->b) * i / (steps - 1);
}
SDL_SetPalette(surface, SDL_LOGPAL|SDL_PHYSPAL, palette, first, steps);
}
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