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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (c) 2010 Thomas Martitz
*
* 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 <jni.h>
#include "config.h"
#include "system.h"
#include "lcd.h"
extern JNIEnv *env_ptr;
extern jclass RockboxService_class;
extern jobject RockboxService_instance;
static jclass RockboxFramebuffer_class;
static jobject RockboxFramebuffer_instance;
static jmethodID java_lcd_update;
static jmethodID java_lcd_update_rect;
static bool display_on;
void lcd_init_device(void)
{
JNIEnv e = *env_ptr;
RockboxFramebuffer_class = e->FindClass(env_ptr,
"org/rockbox/RockboxFramebuffer");
/* instantiate a RockboxFramebuffer instance
*
* Pass lcd width and height and our framebuffer so the java layer
* can create a Bitmap which directly maps to it
**/
/* map the framebuffer to a ByteBuffer, this way lcd updates will
* be directly feched from the framebuffer */
jobject buf = e->NewDirectByteBuffer(env_ptr,
lcd_framebuffer,
(jlong)sizeof(lcd_framebuffer));
jmethodID constructor = e->GetMethodID(env_ptr,
RockboxFramebuffer_class,
"<init>",
"(Landroid/content/Context;" /* Service */
"II" /* lcd width/height */
"Ljava/nio/ByteBuffer;)V"); /* ByteBuffer */
RockboxFramebuffer_instance = e->NewObject(env_ptr,
RockboxFramebuffer_class,
constructor,
RockboxService_instance,
(jint)LCD_WIDTH,
(jint)LCD_HEIGHT,
buf);
/* cache update functions */
java_lcd_update = (*env_ptr)->GetMethodID(env_ptr,
RockboxFramebuffer_class,
"java_lcd_update",
"()V");
java_lcd_update_rect = (*env_ptr)->GetMethodID(env_ptr,
RockboxFramebuffer_class,
"java_lcd_update_rect",
"(IIII)V");
jmethodID fbsetter = e->GetMethodID(env_ptr,RockboxService_class,
"set_fb", "(Lorg/rockbox/RockboxFramebuffer;)V");
e->CallVoidMethod(env_ptr, RockboxService_instance, fbsetter, RockboxFramebuffer_instance);
display_on = true;
}
void lcd_update(void)
{
/* tell the system we're ready for drawing */
if (display_on)
(*env_ptr)->CallVoidMethod(env_ptr, RockboxFramebuffer_instance, java_lcd_update);
}
void lcd_update_rect(int x, int y, int height, int width)
{
if (display_on)
{
(*env_ptr)->CallVoidMethod(env_ptr, RockboxFramebuffer_instance, java_lcd_update_rect,
x, y, height, width);
}
}
bool lcd_active(void)
{
return display_on;
}
/*
* (un)block lcd updates.
*
* Notice: This is called from the activity thread, so take it
* as interrupt context and take care what the event callback does
* (it shouldn't block in particular
*
* the 1s are needed due to strange naming conventions...
**/
JNIEXPORT void JNICALL
Java_org_rockbox_RockboxFramebuffer_set_1lcd_1active(JNIEnv *e,
jobject this,
jint active)
{
(void)e;
(void)this;
display_on = active != 0;
if (active)
send_event(LCD_EVENT_ACTIVATION, NULL);
}
/* below is a plain copy from lcd-sdl.c */
/**
* |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
}
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