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rockbox/uisimulator/sdl/lcd-bitmap.c
Daniel Stenberg 2acc0ac542 Updated our source code header to explicitly mention that we are GPL v2 or 
later. We still need to hunt down snippets used that are not. 1324 modified
files...
http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
2008-06-28 18:10:04 +00:00

371 lines
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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 "debug.h"
#include "uisdl.h"
#include "lcd-sdl.h"
SDL_Surface* lcd_surface;
int lcd_backlight_val;
#if LCD_DEPTH <= 8
#ifdef HAVE_BACKLIGHT
SDL_Color lcd_backlight_color_zero = {UI_LCD_BGCOLORLIGHT, 0};
SDL_Color lcd_backlight_color_max = {UI_LCD_FGCOLORLIGHT, 0};
#endif
SDL_Color lcd_color_zero = {UI_LCD_BGCOLOR, 0};
SDL_Color lcd_color_max = {UI_LCD_FGCOLOR, 0};
#endif
#if LCD_DEPTH < 8
int lcd_ex_shades = 0;
unsigned long (*lcd_ex_getpixel)(int, int) = NULL;
#endif
static unsigned long get_lcd_pixel(int x, int y)
{
#if LCD_DEPTH == 1
return ((lcd_framebuffer[y/8][x] >> (y & 7)) & 1);
#elif LCD_DEPTH == 2
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
return ((lcd_framebuffer[y][x/4] >> (2 * (~x & 3))) & 3);
#elif LCD_PIXELFORMAT == VERTICAL_PACKING
return ((lcd_framebuffer[y/4][x] >> (2 * (y & 3))) & 3);
#elif LCD_PIXELFORMAT == VERTICAL_INTERLEAVED
unsigned bits = (lcd_framebuffer[y/8][x] >> (y & 7)) & 0x0101;
return (bits | (bits >> 7)) & 3;
#endif
#elif LCD_DEPTH == 16
#if LCD_PIXELFORMAT == RGB565SWAPPED
unsigned bits = lcd_framebuffer[y][x];
return (bits >> 8) | (bits << 8);
#else
return lcd_framebuffer[y][x];
#endif
#endif
}
void lcd_update(void)
{
/* update a full screen rect */
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
void lcd_update_rect(int x_start, int y_start, int width, int height)
{
sdl_update_rect(lcd_surface, x_start, y_start, width, height, LCD_WIDTH,
LCD_HEIGHT, get_lcd_pixel);
sdl_gui_update(lcd_surface, x_start, y_start, width, height, LCD_WIDTH,
LCD_HEIGHT, background ? UI_LCD_POSX : 0, background? UI_LCD_POSY : 0);
}
#ifdef HAVE_BACKLIGHT
void sim_backlight(int value)
{
lcd_backlight_val = value;
#if LCD_DEPTH <= 8
if (value > 0) {
sdl_set_gradient(lcd_surface, &lcd_backlight_color_zero,
&lcd_backlight_color_max, 0, (1<<LCD_DEPTH));
} else {
sdl_set_gradient(lcd_surface, &lcd_color_zero, &lcd_color_max,
0, (1<<LCD_DEPTH));
}
#if LCD_DEPTH < 8
if (lcd_ex_shades) {
if (value > 0) {
sdl_set_gradient(lcd_surface, &lcd_backlight_color_max,
&lcd_backlight_color_zero, (1<<LCD_DEPTH),
lcd_ex_shades);
} else {
sdl_set_gradient(lcd_surface, &lcd_color_max, &lcd_color_zero,
(1<<LCD_DEPTH), lcd_ex_shades);
}
}
#endif
sdl_gui_update(lcd_surface, 0, 0, LCD_WIDTH, LCD_HEIGHT, LCD_WIDTH,
LCD_HEIGHT, background ? UI_LCD_POSX : 0, background? UI_LCD_POSY : 0);
#endif
}
#endif
/* initialise simulator lcd driver */
void sim_lcd_init(void)
{
#if LCD_DEPTH == 16
lcd_surface = SDL_CreateRGBSurface(SDL_SWSURFACE, LCD_WIDTH * display_zoom,
LCD_HEIGHT * display_zoom, LCD_DEPTH, 0, 0, 0, 0);
#else
lcd_surface = SDL_CreateRGBSurface(SDL_SWSURFACE, LCD_WIDTH * display_zoom,
LCD_HEIGHT * display_zoom, 8, 0, 0, 0, 0);
#endif
#if LCD_DEPTH <= 8
#ifdef HAVE_BACKLIGHT
sdl_set_gradient(lcd_surface, &lcd_backlight_color_zero, &lcd_color_max,
0, (1<<LCD_DEPTH));
#else
sdl_set_gradient(lcd_surface, &lcd_color_zero, &lcd_color_max, 0,
(1<<LCD_DEPTH));
#endif
#endif
}
#if LCD_DEPTH < 8
void sim_lcd_ex_init(int shades, unsigned long (*getpixel)(int, int))
{
lcd_ex_shades = shades;
lcd_ex_getpixel = getpixel;
if (shades) {
#ifdef HAVE_BACKLIGHT
if (lcd_backlight_val > 0) {
sdl_set_gradient(lcd_surface, &lcd_color_max,
&lcd_backlight_color_zero, (1<<LCD_DEPTH),
shades);
}
else
#endif
{
sdl_set_gradient(lcd_surface, &lcd_color_max, &lcd_color_zero,
(1<<LCD_DEPTH), shades);
}
}
}
void sim_lcd_ex_update_rect(int x_start, int y_start, int width, int height)
{
if (lcd_ex_getpixel) {
sdl_update_rect(lcd_surface, x_start, y_start, width, height,
LCD_WIDTH, LCD_HEIGHT, lcd_ex_getpixel);
sdl_gui_update(lcd_surface, x_start, y_start, width, height, LCD_WIDTH,
LCD_HEIGHT, background ? UI_LCD_POSX : 0,
background? UI_LCD_POSY : 0);
}
}
#endif
#ifdef HAVE_LCD_COLOR
/**
* |R| |1.000000 -0.000001 1.402000| |Y'|
* |G| = |1.000000 -0.334136 -0.714136| |Pb|
* |B| |1.000000 1.772000 0.000000| |Pr|
* Scaled, normalized, rounded and tweaked to yield RGB 565:
* |R| |74 0 101| |Y' - 16| >> 9
* |G| = |74 -24 -51| |Cb - 128| >> 8
* |B| |74 128 0| |Cr - 128| >> 9
*/
#define YFAC (74)
#define RVFAC (101)
#define GUFAC (-24)
#define GVFAC (-51)
#define BUFAC (128)
static inline int clamp(int val, int min, int max)
{
if (val < min)
val = min;
else if (val > max)
val = max;
return val;
}
void lcd_yuv_set_options(unsigned options)
{
(void)options;
}
/* Draw a partial YUV colour bitmap - similiar behavior to lcd_blit_yuv
in the core */
void lcd_blit_yuv(unsigned char * const src[3],
int src_x, int src_y, int stride,
int x, int y, int width, int height)
{
const unsigned char *ysrc, *usrc, *vsrc;
int linecounter;
fb_data *dst, *row_end;
long z;
/* width and height must be >= 2 and an even number */
width &= ~1;
linecounter = height >> 1;
#if LCD_WIDTH >= LCD_HEIGHT
dst = &lcd_framebuffer[y][x];
row_end = dst + width;
#else
dst = &lcd_framebuffer[x][LCD_WIDTH - y - 1];
row_end = dst + LCD_WIDTH * width;
#endif
z = stride * src_y;
ysrc = src[0] + z + src_x;
usrc = src[1] + (z >> 2) + (src_x >> 1);
vsrc = src[2] + (usrc - src[1]);
/* stride => amount to jump from end of last row to start of next */
stride -= width;
/* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */
do
{
do
{
int y, cb, cr, rv, guv, bu, r, g, b;
y = YFAC*(*ysrc++ - 16);
cb = *usrc++ - 128;
cr = *vsrc++ - 128;
rv = RVFAC*cr;
guv = GUFAC*cb + GVFAC*cr;
bu = BUFAC*cb;
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
y = YFAC*(*ysrc++ - 16);
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
}
while (dst < row_end);
ysrc += stride;
usrc -= width >> 1;
vsrc -= width >> 1;
#if LCD_WIDTH >= LCD_HEIGHT
row_end += LCD_WIDTH;
dst += LCD_WIDTH - width;
#else
row_end -= 1;
dst -= LCD_WIDTH*width + 1;
#endif
do
{
int y, cb, cr, rv, guv, bu, r, g, b;
y = YFAC*(*ysrc++ - 16);
cb = *usrc++ - 128;
cr = *vsrc++ - 128;
rv = RVFAC*cr;
guv = GUFAC*cb + GVFAC*cr;
bu = BUFAC*cb;
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
y = YFAC*(*ysrc++ - 16);
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = LCD_RGBPACK_LCD(r >> 9, g >> 8, b >> 9);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
}
while (dst < row_end);
ysrc += stride;
usrc += stride >> 1;
vsrc += stride >> 1;
#if LCD_WIDTH >= LCD_HEIGHT
row_end += LCD_WIDTH;
dst += LCD_WIDTH - width;
#else
row_end -= 1;
dst -= LCD_WIDTH*width + 1;
#endif
}
while (--linecounter > 0);
#if LCD_WIDTH >= LCD_HEIGHT
lcd_update_rect(x, y, width, height);
#else
lcd_update_rect(LCD_WIDTH - y - height, x, height, width);
#endif
}
#endif /* HAVE_LCD_COLOR */
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