summaryrefslogtreecommitdiffstats
path: root/firmware/target/hosted/android/lcd-android.c
blob: 1043dfa35ccd865150a3df964b69979dbb7f1cdb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
/***************************************************************************
 *             __________               __   ___.
 *   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 jobject Framebuffer_instance;
static jmethodID java_lcd_update;
static jmethodID java_lcd_update_rect;

static bool display_on;

void lcd_init_device(void)
{
    /* get the RockboxFramebuffer instance allocated by the activity */
    jfieldID id = (*env_ptr)->GetStaticFieldID(env_ptr,
                                         RockboxService_class,
                                         "fb",
                                         "Lorg/rockbox/RockboxFramebuffer;");

    Framebuffer_instance = (*env_ptr)->GetStaticObjectField(env_ptr,
                                                      RockboxService_class,
                                                      id);

    jclass Framebuffer_class = (*env_ptr)->GetObjectClass(env_ptr,
                                                          Framebuffer_instance);

    /* get the java init function and call it. it'll set up a bitmap
     * based on LCD_WIDTH, LCD_HEIGHT and the ByteBuffer which directly maps
     * our framebuffer */

    jmethodID java_init_lcd = (*env_ptr)->GetMethodID(env_ptr,
                                                   Framebuffer_class,
                                                   "java_lcd_init",
                                                   "(IILjava/nio/ByteBuffer;)V");
    java_lcd_update      = (*env_ptr)->GetMethodID(env_ptr,
                                                   Framebuffer_class,
                                                   "java_lcd_update",
                                                   "()V");
    java_lcd_update_rect = (*env_ptr)->GetMethodID(env_ptr,
                                                   Framebuffer_class,
                                                   "java_lcd_update_rect",
                                                   "(IIII)V");

    /* map the framebuffer to a ByteBuffer, this way lcd updates will
     * be directly feched from the framebuffer */
    jobject buf = (*env_ptr)->NewDirectByteBuffer(env_ptr,
                                                  lcd_framebuffer,
                                                  sizeof(lcd_framebuffer));
    
    (*env_ptr)->CallVoidMethod(env_ptr,
                               Framebuffer_instance,
                               java_init_lcd,
                               LCD_WIDTH, LCD_HEIGHT, buf);
    display_on = true;
}

void lcd_update(void)
{
    /* tell the system we're ready for drawing */
    if (display_on)
        (*env_ptr)->CallVoidMethod(env_ptr, Framebuffer_instance, java_lcd_update);
}

void lcd_update_rect(int x, int y, int height, int width)
{
    if (display_on)
    {
        (*env_ptr)->CallVoidMethod(env_ptr, Framebuffer_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
}