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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 "lcd-sdl.h"
#include "uisdl.h"
int display_zoom = 1;
#ifdef UI_LCD_SPLIT
static int gradient_steps = 0;
#endif
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;
for (y = y_start; y < ymax; y++) {
dest.y = y * display_zoom;
SDL_FillRect(surface, &dest, (Uint32)getpixel(x, y));
}
}
SDL_UnlockSurface(surface);
}
void sdl_gui_update(SDL_Surface *surface, IFSPLIT(SDL_Surface *real_surface,)
int x_start, int y_start, int width,
int height, int max_x, int max_y, int ui_x, int ui_y)
{
int xmax, ymax;
ymax = y_start + height;
xmax = x_start + width;
if(xmax > max_x)
xmax = max_x;
if(ymax >= max_y)
ymax = max_y;
SDL_Rect src = {x_start * display_zoom, y_start * display_zoom,
xmax * display_zoom, ymax * display_zoom};
SDL_Rect dest= {(ui_x + x_start) * display_zoom, (ui_y + y_start) * display_zoom,
xmax * display_zoom, ymax * display_zoom};
#ifdef UI_LCD_SPLIT
/* fix real screen coordinates */
if(ymax >= UI_LCD_SPLIT_LINES)
src.h += UI_LCD_SPLIT_BLACK_LINES * display_zoom;
SDL_LockSurface(surface);
SDL_LockSurface(real_surface);
int pixel, npixels;
#if LCD_DEPTH != 1
#error "Split screen only works for monochrome displays !"
#endif
npixels = display_zoom * display_zoom * UI_LCD_SPLIT_LINES * surface->pitch;
const unsigned char * pixels_src = (const unsigned char*)surface->pixels;
unsigned char * pixels_dst = (unsigned char*)real_surface->pixels;
const int start_pixel = UI_LCD_SPLIT_LINES * surface->pitch * display_zoom;
const int stop_pixel = (UI_LCD_SPLIT_LINES+UI_LCD_SPLIT_BLACK_LINES)
* surface->pitch * display_zoom;
/* draw top pixels, change the color */
for (pixel = 0; pixel < npixels ; pixel++)
{
int pix = pixels_src[pixel] + gradient_steps;
if(pix > 255) pix = 255;
pixels_dst[pixel] = pix;
}
/* copy bottom pixels */
memcpy(&pixels_dst[stop_pixel], &pixels_src[start_pixel],
(UI_LCD_HEIGHT - UI_LCD_SPLIT_LINES) * surface->pitch * display_zoom);
/* separation lines are off */
for (pixel = start_pixel; pixel < stop_pixel ; pixel++)
pixels_dst[pixel] = 0;
SDL_UnlockSurface(surface);
SDL_UnlockSurface(real_surface);
SDL_BlitSurface(real_surface, &src, gui_surface, &dest);
#else
SDL_BlitSurface(surface, &src, gui_surface, &dest);
#endif
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,
IFSPLIT(SDL_Color *split_start,)
IFSPLIT(SDL_Color *split_end ,) int first, int steps)
{
int i;
#ifdef UI_LCD_SPLIT
int tot_steps = steps * 2;
if (tot_steps > 256)
tot_steps = 256;
gradient_steps = steps;
#else
#define tot_steps steps
#endif
SDL_Color palette[tot_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);
}
#ifdef UI_LCD_SPLIT /* extra color */
for (i = steps ; i < tot_steps; i++) {
palette[i].r = split_start->r + (split_end->r - split_start->r) * (i - steps) / (tot_steps - steps - 1);
palette[i].g = split_start->g + (split_end->g - split_start->g) * (i - steps) / (tot_steps - steps - 1);
palette[i].b = split_start->b + (split_end->b - split_start->b) * (i - steps) / (tot_steps - steps - 1);
}
#endif
SDL_SetPalette(surface, SDL_LOGPAL|SDL_PHYSPAL, palette, first, tot_steps);
}
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