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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() */
#include "misc.h"
double display_zoom = 1;
static bool window_needs_update;
void sdl_get_window_dimensions(int *w, int *h)
{
if (background)
{
*w = UI_WIDTH;
*h = UI_HEIGHT;
}
else
{
#ifdef HAVE_REMOTE_LCD
if (showremote)
{
*w = SIM_LCD_WIDTH > SIM_REMOTE_WIDTH ? SIM_LCD_WIDTH : SIM_REMOTE_WIDTH;
*h = SIM_LCD_HEIGHT + SIM_REMOTE_HEIGHT;
}
else
#endif
{
*w = SIM_LCD_WIDTH;
*h = SIM_LCD_HEIGHT;
}
}
}
static inline void sdl_render(void)
{
SDL_Texture *sdlTexture = SDL_CreateTextureFromSurface(sdlRenderer, gui_surface);
SDL_RenderClear(sdlRenderer);
SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, NULL);
SDL_RenderPresent(sdlRenderer);
SDL_DestroyTexture(sdlTexture);
}
#define SNAP_MARGIN 50
int sdl_update_window(void)
{
if (!window_needs_update)
return false;
window_needs_update = false;
#if defined (__APPLE__) || defined(__WIN32) /* Constrain aspect ratio */
if (!(SDL_GetWindowFlags(window) & (SDL_WINDOW_MAXIMIZED | SDL_WINDOW_FULLSCREEN)))
{
float aspect_ratio;
int w, h;
sdl_get_window_dimensions(&w, &h);
aspect_ratio = (float) h / w;
int original_height = h;
int original_width = w;
SDL_GetWindowSize(window, &w, &h);
if (w != original_width || h != original_height)
{
if (abs(original_width - w) < SNAP_MARGIN)
{
w = original_width;
h = original_height;
}
else
h = w * aspect_ratio;
SDL_SetWindowSize(window, w, h);
}
}
#endif
sdl_render();
return true;
}
void sdl_window_needs_update(void)
{
window_needs_update = true;
/* For MacOS and Windows, we're on a main or
display thread already, and can immediately
update the window.
On Linux, we have to defer the update, until
it is handled by the main thread later. */
#if defined (__APPLE__) || defined(__WIN32)
sdl_update_window();
#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))
{
SDL_Rect dest;
#if LCD_DEPTH >= 8 && (LCD_PIXELFORMAT == RGB565) && \
(LCD_STRIDEFORMAT == HORIZONTAL_STRIDE) && \
!defined(HAVE_LCD_SPLIT) && !defined(HAVE_REMOTE_LCD)
SDL_Rect src;
(void)max_x;
(void)max_y;
(void)getpixel;
/* Update complete screen via one blit operation (fast) */
SDL_Surface *lcd = SDL_CreateRGBSurfaceFrom(FBADDR(0, 0), LCD_FBWIDTH,
LCD_FBHEIGHT, LCD_DEPTH,
LCD_FBWIDTH * LCD_DEPTH/8,
0, 0, 0, 0);
src.x = x_start;
src.y = y_start;
src.w = width;
src.h = height;
if (display_zoom == 1) {
dest = src;
SDL_BlitSurface(lcd, &src, surface, &dest);
} else {
/* Note: SDL_SoftStretch is currently marked as DO NOT USE
but there are no real alternatives for efficent zooming. */
dest.x = src.x * display_zoom;
dest.y = src.y * display_zoom;
dest.w = src.w * display_zoom;
dest.h = src.h * display_zoom;
SDL_SoftStretch(lcd, &src, surface, &dest);
}
SDL_FreeSurface(lcd);
#else
int x, y;
int xmax, ymax;
/* Very slow pixel-by-pixel drawing */
ymax = y_start + height;
xmax = x_start + width;
if(xmax > max_x)
xmax = max_x;
if(ymax >= max_y)
ymax = max_y;
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
}
#endif
}
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};
uint8_t alpha;
if (SDL_GetSurfaceAlphaMod(surface,&alpha) == 0 && alpha < 255)
SDL_FillRect(gui_surface, &dest, 0); /* alpha needs a black background */
SDL_BlitSurface(surface, &src, gui_surface, &dest);
if (!sdl_update_window()) /* already calls sdl_render itself */
sdl_render();
}
/* 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_SetPaletteColors(surface->format->palette, palette, first , steps);
}
int lcd_get_dpi(void)
{
#if (CONFIG_PLATFORM & PLATFORM_MAEMO5)
return 267;
#elif (CONFIG_PLATFORM & PLATFORM_MAEMO4)
return 225;
#elif (CONFIG_PLATFORM & PLATFORM_PANDORA)
return 217;
#else
/* TODO: find a way to query it from the OS, SDL doesn't support it
* directly; for now assume the more or less standard 96 */
return 96;
#endif
}
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