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rockbox/apps/plugins/lib/grey_core.c
Teruaki Kawashima 0cf4cab431 plugins/lib: remove out-dated comments about plugin api. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24907 a1c6a512-1295-4272-9138-f99709370657
2010-02-25 12:14:36 +00:00

943 lines
37 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* New greyscale framework
* Core & miscellaneous functions
*
* This is a generic framework to display 129 shades of grey on low-depth
* bitmap LCDs (Archos b&w, Iriver & Ipod 4-grey) within plugins.
*
* Copyright (C) 2008 Jens Arnold
*
* 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 "plugin.h"
#include "grey.h"
#if defined(HAVE_ADJUSTABLE_CPU_FREQ) && \
(defined(CPU_PP) || (CONFIG_LCD == LCD_TL0350A))
#define NEED_BOOST
#endif
#ifndef SIMULATOR
#if defined ARCHOS_RECORDER /* verified */ \
|| defined ARCHOS_FMRECORDER /* should be identical */ \
|| defined ARCHOS_RECORDERV2 /* should be identical */ \
|| defined ARCHOS_ONDIOFM /* verified */ \
|| defined ARCHOS_ONDIOSP /* verified */
/* Average measurements of a Recorder v1, an Ondio FM, a backlight-modded
* Ondio FM, and an Ondio SP. */
static const unsigned char lcdlinear[256] = {
5, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 29, 31, 33, 35,
37, 39, 40, 42, 43, 45, 46, 48, 49, 50, 51, 53, 54, 55, 57, 58,
59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 68, 69, 70, 71, 71, 72,
73, 74, 74, 75, 76, 77, 77, 78, 79, 79, 80, 80, 81, 81, 82, 82,
83, 84, 84, 85, 86, 86, 87, 87, 88, 88, 89, 89, 90, 90, 91, 91,
92, 92, 93, 93, 94, 94, 95, 95, 96, 96, 97, 98, 98, 99, 100, 100,
101, 101, 102, 103, 103, 104, 105, 105, 106, 106, 107, 107, 108, 108, 109, 109,
110, 110, 111, 112, 112, 113, 114, 114, 115, 115, 116, 117, 117, 118, 119, 119,
120, 120, 121, 122, 123, 123, 124, 125, 126, 126, 127, 128, 129, 129, 130, 131,
132, 132, 133, 134, 135, 135, 136, 137, 138, 138, 139, 140, 140, 141, 141, 142,
143, 144, 145, 146, 147, 147, 148, 149, 150, 151, 152, 153, 154, 154, 155, 156,
157, 158, 159, 160, 161, 161, 162, 163, 164, 165, 166, 167, 168, 168, 169, 170,
171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 184, 185, 186, 187,
188, 189, 191, 192, 194, 195, 197, 198, 199, 200, 202, 203, 204, 205, 207, 208,
209, 210, 212, 213, 215, 216, 218, 219, 220, 221, 222, 223, 225, 226, 227, 228,
229, 230, 232, 233, 234, 235, 237, 238, 239, 240, 242, 243, 244, 246, 247, 248
};
/* The actual LCD scanrate varies a lot with temperature on these targets */
#define LCD_SCANRATE 67 /* Hz */
#elif defined IAUDIO_M3 /* verified */
/* Average measurements of 2 iAudio remotes connected to an M3. */
static const unsigned char lcdlinear[256] = {
5, 9, 13, 17, 21, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 66,
70, 73, 76, 78, 80, 82, 84, 86, 88, 90, 91, 92, 94, 95, 96, 97,
98, 99, 99, 100, 101, 102, 102, 103, 104, 104, 105, 105, 106, 107, 107, 108,
109, 109, 110, 110, 111, 111, 112, 112, 113, 113, 114, 114, 115, 115, 116, 116,
117, 117, 118, 118, 119, 119, 120, 120, 121, 121, 121, 122, 122, 123, 123, 123,
124, 124, 124, 125, 125, 126, 126, 126, 127, 127, 127, 128, 128, 129, 129, 129,
130, 130, 131, 131, 132, 132, 133, 133, 134, 134, 134, 135, 135, 136, 136, 136,
137, 137, 137, 138, 138, 139, 139, 139, 140, 140, 141, 141, 142, 142, 143, 143,
144, 144, 145, 145, 146, 147, 147, 148, 149, 149, 150, 150, 151, 151, 152, 152,
153, 153, 154, 154, 155, 155, 156, 156, 157, 157, 158, 158, 159, 160, 160, 161,
162, 162, 163, 164, 164, 165, 166, 167, 168, 168, 169, 169, 170, 171, 171, 172,
173, 173, 174, 175, 176, 176, 177, 178, 179, 179, 180, 181, 182, 182, 183, 184,
185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 198, 199, 200, 201,
202, 203, 204, 205, 207, 208, 209, 210, 211, 212, 213, 214, 216, 217, 218, 219,
220, 221, 222, 223, 225, 226, 227, 228, 229, 230, 231, 232, 234, 235, 236, 237,
238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 249, 250, 251, 252
};
/* The actual LCD scanrate is 3x as high, but 150 Hz or 75 Hz cause a too high
* CPU load (> 50 %). Even at 50Hz, greyscale display is rather smooth. Average
* from 2 iAudio remotes. */
#define LCD_SCANRATE 50 /* Hz */
#elif defined IAUDIO_M5 /* verified */
/* Measurement of one iAudio M5L */
static const unsigned char lcdlinear[256] = {
4, 6, 8, 10, 11, 13, 15, 17, 19, 21, 22, 24, 25, 27, 28, 30,
32, 33, 35, 36, 37, 39, 40, 42, 43, 44, 45, 46, 48, 49, 50, 51,
52, 52, 53, 54, 55, 55, 56, 57, 58, 58, 59, 60, 61, 61, 62, 63,
64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 70, 70, 71, 72, 72,
73, 73, 74, 75, 75, 76, 77, 77, 78, 78, 79, 79, 80, 80, 81, 81,
82, 82, 83, 84, 84, 85, 86, 86, 87, 87, 88, 89, 89, 90, 91, 91,
92, 92, 93, 93, 94, 94, 95, 95, 96, 96, 97, 98, 98, 99, 100, 100,
101, 101, 102, 102, 103, 103, 104, 104, 105, 105, 106, 106, 107, 107, 108, 108,
109, 109, 110, 110, 111, 111, 112, 112, 113, 113, 114, 114, 115, 115, 116, 116,
117, 117, 118, 119, 119, 120, 121, 121, 122, 122, 123, 124, 124, 125, 126, 126,
127, 127, 128, 129, 130, 130, 131, 132, 133, 133, 134, 135, 135, 136, 137, 137,
138, 139, 140, 141, 142, 142, 143, 144, 145, 146, 147, 148, 149, 149, 150, 151,
152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 163, 164, 165, 167, 168, 169,
170, 172, 173, 175, 177, 179, 180, 182, 184, 186, 188, 190, 192, 194, 196, 198,
200, 202, 204, 205, 207, 209, 210, 212, 214, 216, 218, 219, 221, 223, 224, 226,
228, 230, 231, 233, 235, 236, 237, 239, 241, 243, 244, 246, 248, 249, 250, 252
};
#define LCD_SCANRATE 73 /* Hz */
#elif defined IPOD_1G2G /* verified */
/* Average measurements of an iPod 1st Gen (0x00010001) and an iPod 2nd Gen
* (0x00020000), measured with both backlight off & backlight on (flipped
* curves) and medium load (white background when measuring with backlight on),
* as the curve is load dependent (the controller's step-up converter doesn't
* provide enough juice). Table is for backlight_off state. */
static const unsigned char lcdlinear[256] = {
4, 6, 8, 9, 11, 13, 14, 16, 17, 18, 20, 21, 23, 24, 26, 27,
29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 41, 42, 43, 44,
45, 45, 46, 47, 47, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53,
54, 54, 54, 55, 55, 56, 56, 56, 57, 57, 57, 58, 58, 59, 59, 59,
60, 60, 60, 61, 61, 62, 62, 62, 63, 63, 63, 64, 64, 65, 65, 65,
66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71, 72, 72, 73, 73,
74, 74, 74, 75, 75, 76, 76, 76, 77, 77, 78, 78, 79, 79, 80, 80,
81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87, 88, 88,
89, 89, 90, 91, 92, 92, 93, 94, 95, 95, 96, 97, 97, 98, 99, 99,
100, 100, 101, 102, 102, 103, 104, 104, 105, 105, 106, 107, 107, 108, 109, 109,
110, 110, 111, 112, 113, 113, 114, 115, 116, 116, 117, 118, 119, 119, 120, 121,
122, 122, 123, 124, 125, 125, 126, 127, 128, 129, 130, 131, 131, 132, 133, 134,
135, 137, 138, 139, 141, 142, 144, 145, 146, 147, 149, 150, 151, 152, 154, 155,
156, 158, 159, 161, 162, 164, 165, 167, 169, 171, 172, 174, 175, 177, 178, 180,
182, 184, 186, 188, 189, 191, 193, 195, 197, 199, 201, 203, 206, 208, 210, 212,
214, 217, 219, 221, 224, 226, 229, 231, 233, 236, 238, 240, 243, 245, 247, 250
};
/* Average from an iPod 1st Gen and an iPod 2nd Gen */
#define LCD_SCANRATE 96 /* Hz */
#elif defined IPOD_MINI2G /* verified */ \
|| defined IPOD_MINI /* should be identical */ \
|| defined IPOD_3G /* TODO: verify */ \
|| defined IPOD_4G /* TODO: verify */
/* Measurement of one iPod Mini G2 */
static const unsigned char lcdlinear[256] = {
2, 5, 7, 10, 12, 15, 17, 20, 22, 24, 26, 28, 30, 32, 34, 36,
38, 40, 41, 42, 44, 45, 46, 47, 48, 49, 50, 50, 51, 52, 52, 53,
54, 54, 55, 55, 56, 56, 57, 57, 58, 58, 58, 59, 59, 60, 60, 60,
61, 61, 61, 62, 62, 63, 63, 63, 64, 64, 64, 64, 65, 65, 65, 65,
66, 66, 66, 66, 67, 67, 67, 67, 68, 68, 68, 68, 69, 69, 69, 69,
70, 70, 70, 70, 71, 71, 71, 71, 72, 72, 72, 73, 73, 74, 74, 74,
75, 75, 75, 75, 76, 76, 76, 76, 77, 77, 77, 78, 78, 79, 79, 79,
80, 80, 80, 81, 81, 82, 82, 82, 83, 83, 83, 84, 84, 85, 85, 85,
86, 86, 86, 87, 87, 88, 88, 88, 89, 89, 90, 90, 91, 91, 92, 92,
93, 93, 94, 94, 95, 95, 96, 96, 97, 97, 98, 99, 99, 100, 101, 101,
102, 102, 103, 104, 104, 105, 106, 106, 107, 108, 109, 110, 110, 111, 112, 113,
114, 115, 115, 116, 117, 118, 118, 119, 120, 121, 121, 122, 123, 124, 124, 125,
126, 127, 128, 129, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140,
141, 142, 143, 144, 146, 147, 148, 149, 150, 151, 153, 154, 155, 156, 158, 159,
160, 162, 163, 165, 166, 168, 169, 171, 172, 175, 177, 180, 182, 185, 187, 190,
192, 196, 199, 203, 206, 210, 213, 217, 220, 223, 227, 230, 234, 238, 242, 246
};
/* Average of an iPod Mini G2 and 2 3rd Gen iPods. */
#define LCD_SCANRATE 87 /* Hz */
#elif defined IRIVER_H100_SERIES /* verified */
/* Measurement of one Iriver H140 */
static const unsigned char lcdlinear[256] = {
5, 8, 12, 15, 18, 22, 25, 28, 31, 34, 36, 39, 42, 44, 47, 50,
53, 55, 57, 59, 62, 64, 66, 68, 70, 71, 72, 73, 75, 76, 77, 78,
79, 80, 80, 81, 82, 83, 83, 84, 85, 85, 86, 86, 87, 87, 88, 88,
89, 89, 90, 90, 91, 91, 92, 92, 93, 93, 93, 94, 94, 95, 95, 95,
96, 96, 96, 97, 97, 98, 98, 98, 99, 99, 99, 100, 100, 101, 101, 101,
102, 102, 102, 103, 103, 104, 104, 104, 105, 105, 106, 106, 107, 107, 108, 108,
109, 109, 109, 110, 110, 111, 111, 111, 112, 112, 113, 113, 114, 114, 115, 115,
116, 116, 117, 117, 118, 118, 119, 119, 120, 120, 121, 121, 122, 122, 123, 123,
124, 124, 125, 125, 126, 127, 127, 128, 129, 129, 130, 130, 131, 131, 132, 132,
133, 133, 134, 135, 135, 136, 137, 137, 138, 138, 139, 139, 140, 140, 141, 141,
142, 142, 143, 143, 144, 145, 145, 146, 147, 147, 148, 148, 149, 150, 150, 151,
152, 152, 153, 153, 154, 155, 155, 156, 157, 157, 158, 159, 160, 160, 161, 162,
163, 164, 165, 166, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177,
178, 179, 181, 182, 183, 184, 186, 187, 188, 189, 191, 192, 193, 194, 196, 197,
198, 200, 202, 203, 205, 207, 208, 210, 212, 214, 215, 217, 218, 220, 221, 223,
224, 226, 228, 229, 231, 233, 235, 236, 238, 240, 241, 242, 244, 245, 246, 248
};
#define LCD_SCANRATE 70 /* Hz */
#elif defined MROBE_100 /* verified */
/* Average measurements of 2 m:robe 100 s */
static const unsigned char lcdlinear[256] = {
10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 49, 53, 56, 60, 63, 67,
70, 73, 76, 79, 81, 84, 87, 90, 92, 95, 97, 100, 102, 105, 107, 110,
112, 114, 116, 118, 119, 121, 123, 125, 126, 128, 130, 131, 133, 135, 136, 138,
139, 141, 142, 143, 144, 146, 147, 148, 149, 150, 151, 152, 154, 155, 156, 157,
158, 159, 160, 161, 161, 162, 163, 164, 165, 166, 167, 168, 168, 169, 170, 171,
172, 172, 173, 173, 174, 174, 175, 175, 176, 176, 177, 178, 178, 179, 180, 180,
181, 181, 182, 182, 183, 183, 184, 184, 185, 185, 186, 186, 187, 187, 188, 188,
189, 189, 190, 190, 191, 191, 192, 192, 193, 193, 193, 194, 194, 195, 195, 195,
196, 196, 197, 197, 198, 198, 199, 199, 200, 200, 200, 201, 201, 202, 202, 202,
203, 203, 204, 204, 205, 205, 206, 206, 207, 207, 207, 208, 208, 209, 209, 209,
210, 210, 210, 211, 211, 212, 212, 212, 213, 213, 213, 214, 214, 215, 215, 215,
216, 216, 216, 217, 217, 218, 218, 218, 219, 219, 219, 220, 220, 221, 221, 221,
222, 222, 222, 223, 223, 224, 224, 224, 225, 225, 225, 226, 226, 227, 227, 227,
228, 228, 229, 229, 230, 230, 231, 231, 232, 232, 232, 233, 233, 234, 234, 234,
235, 235, 235, 236, 236, 237, 237, 237, 238, 238, 238, 239, 239, 240, 240, 240,
241, 241, 242, 242, 243, 243, 244, 244, 247, 248, 248, 249, 250, 250, 251, 252
};
#define LCD_SCANRATE 51 /* Hz */
#elif defined SANSA_CLIP /* NOT verified */
static const unsigned char lcdlinear[256] = {
0, 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
};
#define LCD_SCANRATE 78 /* Hz */
#else /* not yet calibrated targets - generic linear mapping */
/* TODO: calibrate iFP7xx */
static const unsigned char lcdlinear[256] = {
0, 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
};
/* generic default */
#define LCD_SCANRATE 70 /* Hz */
#endif
#else /* SIMULATOR */
/* undo a (generic) PC display gamma of 2.0 to simulate target behaviour */
static const unsigned char lcdlinear[256] = {
0, 16, 23, 28, 32, 36, 39, 42, 45, 48, 50, 53, 55, 58, 60, 62,
64, 66, 68, 70, 71, 73, 75, 77, 78, 80, 81, 83, 84, 86, 87, 89,
90, 92, 93, 94, 96, 97, 98, 100, 101, 102, 103, 105, 106, 107, 108, 109,
111, 112, 113, 114, 115, 116, 117, 118, 119, 121, 122, 123, 124, 125, 126, 127,
128, 129, 130, 131, 132, 133, 134, 135, 135, 136, 137, 138, 139, 140, 141, 142,
143, 144, 145, 145, 146, 147, 148, 149, 150, 151, 151, 152, 153, 154, 155, 156,
156, 157, 158, 159, 160, 160, 161, 162, 163, 164, 164, 165, 166, 167, 167, 168,
169, 170, 170, 171, 172, 173, 173, 174, 175, 176, 176, 177, 178, 179, 179, 180,
181, 181, 182, 183, 183, 184, 185, 186, 186, 187, 188, 188, 189, 190, 190, 191,
192, 192, 193, 194, 194, 195, 196, 196, 197, 198, 198, 199, 199, 200, 201, 201,
202, 203, 203, 204, 204, 205, 206, 206, 207, 208, 208, 209, 209, 210, 211, 211,
212, 212, 213, 214, 214, 215, 215, 216, 217, 217, 218, 218, 219, 220, 220, 221,
221, 222, 222, 223, 224, 224, 225, 225, 226, 226, 227, 228, 228, 229, 229, 230,
230, 231, 231, 232, 233, 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 238,
239, 240, 240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246, 247,
247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 253, 254, 254, 255
};
#endif /* SIMULATOR */
/* Prototypes */
static inline void _deferred_update(void) __attribute__ ((always_inline));
static int exp_s16p16(int x);
static int log_s16p16(int x);
static void grey_screendump_hook(int fd);
static void fill_gvalues(void);
#ifdef SIMULATOR
static unsigned long _grey_get_pixel(int x, int y);
#else
static void _timer_isr(void);
#endif
#if defined(HAVE_BACKLIGHT_INVERSION) && !defined(SIMULATOR)
static void invert_gvalues(void)
{
unsigned char *val, *end;
unsigned char rev_tab[256];
unsigned i;
unsigned last_i = 0;
unsigned x = 0;
unsigned last_x;
/* Step 1: Calculate a transposed table for undoing the old mapping */
for (i = 0; i < 256; i++)
{
last_x = x;
x = _grey_info.gvalue[i];
if (x > last_x)
{
rev_tab[last_x++] = (last_i + i) / 2;
while (x > last_x)
rev_tab[last_x++] = i;
last_i = i;
}
}
rev_tab[last_x++] = (last_i + 255) / 2;
while (256 > last_x)
rev_tab[last_x++] = 255;
/* Step 2: Calculate new mapping */
fill_gvalues();
/* Step 3: Transpose all pixel values */
val = _grey_info.values;
end = val + _GREY_MULUQ(_grey_info.width, _grey_info.height);
do
*val = _grey_info.gvalue[rev_tab[*val]];
while (++val < end);
}
#endif
/* Update LCD areas not covered by the greyscale overlay */
static inline void _deferred_update(void)
{
int x1 = MAX(_grey_info.x, 0);
int x2 = MIN(_grey_info.x + _grey_info.width, LCD_WIDTH);
int y1 = MAX(_grey_info.y, 0);
int y2 = MIN(_grey_info.y + _grey_info.height, LCD_HEIGHT);
if (y1 > 0) /* refresh part above overlay, full width */
rb->lcd_update_rect(0, 0, LCD_WIDTH, y1);
if (y2 < LCD_HEIGHT) /* refresh part below overlay, full width */
rb->lcd_update_rect(0, y2, LCD_WIDTH, LCD_HEIGHT - y2);
if (x1 > 0) /* refresh part to the left of overlay */
rb->lcd_update_rect(0, y1, x1, y2 - y1);
if (x2 < LCD_WIDTH) /* refresh part to the right of overlay */
rb->lcd_update_rect(x2, y1, LCD_WIDTH - x2, y2 - y1);
}
#ifdef SIMULATOR
/* Callback function for grey_ub_gray_bitmap_part() to read a pixel from the
* greybuffer. Note that x and y are in LCD coordinates, not greybuffer
* coordinates! */
static unsigned long _grey_get_pixel(int x, int y)
{
long val;
int xg = x - _grey_info.x;
int yg = y - _grey_info.y;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
int idx = _grey_info.width * yg + xg;
#else /* vertical packing or vertical interleaved */
int idx = _grey_info.width * (yg & ~_GREY_BMASK)
+ (xg << _GREY_BSHIFT) + (~yg & _GREY_BMASK);
#endif
val = _grey_info.values[idx];
#ifdef HAVE_LCD_SPLIT
val -= val >> 7;
#endif
return val;
}
#else /* !SIMULATOR */
/* Timer interrupt handler: display next frame */
static void _timer_isr(void)
{
#if defined(HAVE_BACKLIGHT_INVERSION) && !defined(SIMULATOR)
unsigned long check = rb->is_backlight_on(true)
? 0 : _GREY_BACKLIGHT_ON;
if ((_grey_info.flags & (_GREY_BACKLIGHT_ON|GREY_RAWMAPPED)) == check)
{
_grey_info.flags ^= _GREY_BACKLIGHT_ON;
invert_gvalues();
return; /* don't overload this timer slot */
}
#endif
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
rb->lcd_blit_grey_phase(_grey_info.values, _grey_info.phases,
_grey_info.bx, _grey_info.y,
_grey_info.bwidth, _grey_info.height,
_grey_info.width);
#else /* vertical packing or vertical interleaved */
rb->lcd_blit_grey_phase(_grey_info.values, _grey_info.phases,
_grey_info.x, _grey_info.by,
_grey_info.width, _grey_info.bheight,
_grey_info.width);
#endif
if (_grey_info.flags & _GREY_DEFERRED_UPDATE) /* lcd_update() requested? */
{
_deferred_update();
_grey_info.flags &= ~_GREY_DEFERRED_UPDATE; /* clear request */
}
}
#endif /* !SIMULATOR */
/* fixed point exp() */
static int exp_s16p16(int x)
{
int t;
int y = 0x00010000;
if (x < 0) x += 0xb1721, y >>= 16;
t = x - 0x58b91; if (t >= 0) x = t, y <<= 8;
t = x - 0x2c5c8; if (t >= 0) x = t, y <<= 4;
t = x - 0x162e4; if (t >= 0) x = t, y <<= 2;
t = x - 0x0b172; if (t >= 0) x = t, y <<= 1;
t = x - 0x067cd; if (t >= 0) x = t, y += y >> 1;
t = x - 0x03920; if (t >= 0) x = t, y += y >> 2;
t = x - 0x01e27; if (t >= 0) x = t, y += y >> 3;
t = x - 0x00f85; if (t >= 0) x = t, y += y >> 4;
t = x - 0x007e1; if (t >= 0) x = t, y += y >> 5;
t = x - 0x003f8; if (t >= 0) x = t, y += y >> 6;
t = x - 0x001fe; if (t >= 0) x = t, y += y >> 7;
y += ((y >> 8) * x) >> 8;
return y;
}
/* fixed point log() */
static int log_s16p16(int x)
{
int t;
int y = 0xa65af;
if (x < 0x00008000) x <<=16, y -= 0xb1721;
if (x < 0x00800000) x <<= 8, y -= 0x58b91;
if (x < 0x08000000) x <<= 4, y -= 0x2c5c8;
if (x < 0x20000000) x <<= 2, y -= 0x162e4;
if (x < 0x40000000) x <<= 1, y -= 0x0b172;
t = x + (x >> 1); if ((t & 0x80000000) == 0) x = t, y -= 0x067cd;
t = x + (x >> 2); if ((t & 0x80000000) == 0) x = t, y -= 0x03920;
t = x + (x >> 3); if ((t & 0x80000000) == 0) x = t, y -= 0x01e27;
t = x + (x >> 4); if ((t & 0x80000000) == 0) x = t, y -= 0x00f85;
t = x + (x >> 5); if ((t & 0x80000000) == 0) x = t, y -= 0x007e1;
t = x + (x >> 6); if ((t & 0x80000000) == 0) x = t, y -= 0x003f8;
t = x + (x >> 7); if ((t & 0x80000000) == 0) x = t, y -= 0x001fe;
x = 0x80000000 - x;
y -= x >> 15;
return y;
}
static void fill_gvalues(void)
{
int i;
unsigned data;
#if defined(HAVE_BACKLIGHT_INVERSION) && !defined(SIMULATOR)
unsigned imask = (_grey_info.flags & _GREY_BACKLIGHT_ON) ? 0xff : 0;
#else
const unsigned imask = 0;
#endif
for (i = 0; i < 256; i++)
{
data = exp_s16p16((_GREY_GAMMA * log_s16p16(i * 257 + 1)) >> 8) + 128;
data = (data - (data >> 8)) >> 8; /* approx. data /= 257 */
data = ((lcdlinear[data ^ imask] ^ imask) << 7) + 127;
_grey_info.gvalue[i] = (data + (data >> 8)) >> 8;
/* approx. data / 255 */
}
}
/* Initialise the framework and prepare the greyscale display buffer
arguments:
gbuf = pointer to the memory area to use (e.g. plugin buffer)
gbuf_size = max usable size of the buffer
features = flags for requesting features
GREY_BUFFERED: use chunky pixel buffering
This allows to use all drawing functions, but needs more
memory. Unbuffered operation provides only a subset of
drawing functions. (only grey_bitmap drawing and scrolling)
GREY_RAWMAPPED: no LCD linearisation and gamma correction
width = width in pixels (1..LCD_WIDTH)
height = height in pixels (1..LCD_HEIGHT)
Note that depending on the target LCD, either height or
width are rounded up to a multiple of 4 or 8.
result:
true on success, false on failure
If you need info about the memory taken by the greyscale buffer, supply a
long* as the last parameter. This long will then contain the number of bytes
used. The total memory needed can be calculated as follows:
total_mem =
width * height * 2 [grey display data]
+ buffered ? (width * height) : 0 [chunky buffer]
+ 0..3 [alignment]
The function is authentic regarding memory usage on the simulator, even
if it doesn't use all of the allocated memory. */
bool grey_init(unsigned char *gbuf, long gbuf_size,
unsigned features, int width, int height, long *buf_taken)
{
int bdim, i;
long plane_size, buftaken;
unsigned data;
#ifndef SIMULATOR
unsigned *dst, *end;
#endif
if ((unsigned) width > LCD_WIDTH
|| (unsigned) height > LCD_HEIGHT)
return false;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
bdim = (width + 7) >> 3;
width = bdim << 3;
#else /* vertical packing or vertical interleaved */
#if (LCD_DEPTH == 1) || (LCD_PIXELFORMAT == VERTICAL_INTERLEAVED)
bdim = (height + 7) >> 3;
height = bdim << 3;
#elif LCD_DEPTH == 2
bdim = (height + 3) >> 2;
height = bdim << 2;
#endif
#endif
plane_size = _GREY_MULUQ(width, height);
#if defined(CPU_COLDFIRE) /* Buffers should be line aligned */ \
|| defined(CPU_PP) && (NUM_CORES > 1) /* Buffers must be cache line aligned */
plane_size += (-plane_size) & 0xf;
buftaken = (-(long)gbuf) & 0xf;
#else /* Buffers must be 32 bit aligned. */
buftaken = (-(long)gbuf) & 3;
#endif
gbuf += buftaken;
if (features & GREY_BUFFERED) /* chunky buffer */
{
_grey_info.buffer = gbuf;
gbuf += plane_size;
buftaken += plane_size;
}
#if NUM_CORES > 1 /* Values and phases must be uncached when running on COP */
if (features & GREY_ON_COP)
gbuf = UNCACHED_ADDR(gbuf);
#endif
_grey_info.values = gbuf;
gbuf += plane_size;
_grey_info.phases = gbuf;
buftaken += 2 * plane_size;
if (buftaken > gbuf_size)
return false;
/* Init to white */
rb->memset(_grey_info.values, 0x80, plane_size);
#ifndef SIMULATOR
/* Init phases with random bits */
dst = (unsigned*)(_grey_info.phases);
end = (unsigned*)(_grey_info.phases + plane_size);
do
*dst++ = rb->rand();
while (dst < end);
#endif
_grey_info.x = 0;
_grey_info.y = 0;
_grey_info.width = width;
_grey_info.height = height;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
_grey_info.bx = 0;
_grey_info.bwidth = bdim;
#else /* vertical packing or vertical interleaved */
_grey_info.by = 0;
_grey_info.bheight = bdim;
#endif
_grey_info.flags = features & 0xff;
_grey_info.fg_brightness = 0;
_grey_info.bg_brightness = 255;
_grey_info.drawmode = DRMODE_SOLID;
_grey_info.curfont = FONT_SYSFIXED;
/* precalculate the value -> pattern index conversion table, taking
linearisation and gamma correction into account */
if (features & GREY_RAWMAPPED)
{
for (i = 0; i < 256; i++)
{
data = i << 7;
_grey_info.gvalue[i] = (data + (data >> 8)) >> 8;
}
}
else
{
#if defined(HAVE_BACKLIGHT_INVERSION) && !defined(SIMULATOR)
if (rb->is_backlight_on(true))
_grey_info.flags |= _GREY_BACKLIGHT_ON;
#endif
fill_gvalues();
}
if (buf_taken) /* caller requested info about space taken */
*buf_taken = buftaken;
return true;
}
/* Release the greyscale display buffer and the library
DO CALL either this function or at least grey_show_display(false)
before you exit, otherwise nasty things may happen. */
void grey_release(void)
{
grey_show(false);
}
/* Switch the greyscale overlay on or off
DO NOT call lcd_update() or any other api function that directly accesses
the lcd while the greyscale overlay is running! If you need to do
lcd_update() to update something outside the greyscale overlay area, use
grey_deferred_update() instead.
Other functions to avoid are:
lcd_blit_mono(), lcd_update_rect(), lcd_set_contrast(),
lcd_set_invert_display(), lcd_set_flip() */
void grey_show(bool enable)
{
if (enable && !(_grey_info.flags & _GREY_RUNNING))
{
_grey_info.flags |= _GREY_RUNNING;
#ifdef SIMULATOR
rb->sim_lcd_ex_init(_grey_get_pixel);
rb->sim_lcd_ex_update_rect(_grey_info.x, _grey_info.y,
_grey_info.width, _grey_info.height);
#else /* !SIMULATOR */
#ifdef NEED_BOOST
rb->cpu_boost(true);
#endif
#if NUM_CORES > 1
rb->timer_register(1, NULL, TIMER_FREQ / LCD_SCANRATE,
_timer_isr,
(_grey_info.flags & GREY_ON_COP) ? COP : CPU);
#else
rb->timer_register(1, NULL, TIMER_FREQ / LCD_SCANRATE, _timer_isr);
#endif
#endif /* !SIMULATOR */
rb->screen_dump_set_hook(grey_screendump_hook);
}
else if (!enable && (_grey_info.flags & _GREY_RUNNING))
{
#ifdef SIMULATOR
rb->sim_lcd_ex_init(NULL);
#else /* !SIMULATOR */
rb->timer_unregister();
#if NUM_CORES > 1 /* Make sure the ISR has finished before calling lcd_update() */
rb->sleep(HZ/100);
#endif
#ifdef NEED_BOOST
rb->cpu_boost(false);
#endif
#endif /* !SIMULATOR */
_grey_info.flags &= ~_GREY_RUNNING;
rb->screen_dump_set_hook(NULL);
rb->lcd_update(); /* restore whatever there was before */
}
}
void grey_update_rect(int x, int y, int width, int height)
{
grey_ub_gray_bitmap_part(_grey_info.buffer, x, y, _grey_info.width,
x, y, width, height);
}
/* Update the whole greyscale overlay */
void grey_update(void)
{
grey_ub_gray_bitmap_part(_grey_info.buffer, 0, 0, _grey_info.width,
0, 0, _grey_info.width, _grey_info.height);
}
/* Do an lcd_update() to show changes done by rb->lcd_xxx() functions
(in areas of the screen not covered by the greyscale overlay). */
void grey_deferred_lcd_update(void)
{
if (_grey_info.flags & _GREY_RUNNING)
{
#ifdef SIMULATOR
_deferred_update();
#else
_grey_info.flags |= _GREY_DEFERRED_UPDATE;
#endif
}
else
rb->lcd_update();
}
/*** Screenshot ***/
#ifdef HAVE_LCD_SPLIT
#define NUM_SHADES 128
#define BMP_NUMCOLORS 256
#else
#define NUM_SHADES 129
#define BMP_NUMCOLORS 129
#endif
#define BMP_BPP 8
#define BMP_LINESIZE ((LCD_WIDTH + 3) & ~3)
#define BMP_HEADERSIZE (54 + 4 * BMP_NUMCOLORS)
#define BMP_DATASIZE (BMP_LINESIZE * (LCD_HEIGHT+LCD_SPLIT_LINES))
#define BMP_TOTALSIZE (BMP_HEADERSIZE + BMP_DATASIZE)
static const unsigned char bmpheader[] =
{
0x42, 0x4d, /* 'BM' */
LE32_CONST(BMP_TOTALSIZE), /* Total file size */
0x00, 0x00, 0x00, 0x00, /* Reserved */
LE32_CONST(BMP_HEADERSIZE), /* Offset to start of pixel data */
0x28, 0x00, 0x00, 0x00, /* Size of (2nd) header */
LE32_CONST(LCD_WIDTH), /* Width in pixels */
LE32_CONST(LCD_HEIGHT+LCD_SPLIT_LINES), /* Height in pixels */
0x01, 0x00, /* Number of planes (always 1) */
LE16_CONST(BMP_BPP), /* Bits per pixel 1/4/8/16/24 */
0x00, 0x00, 0x00, 0x00, /* Compression mode, 0 = none */
LE32_CONST(BMP_DATASIZE), /* Size of bitmap data */
0xc4, 0x0e, 0x00, 0x00, /* Horizontal resolution (pixels/meter) */
0xc4, 0x0e, 0x00, 0x00, /* Vertical resolution (pixels/meter) */
LE32_CONST(BMP_NUMCOLORS), /* Number of used colours */
LE32_CONST(BMP_NUMCOLORS), /* Number of important colours */
};
#if LCD_DEPTH == 2
/* Only defined for positive, non-split LCD for now */
static const unsigned char colorindex[4] = {128, 85, 43, 0};
#endif
/* Hook function for core screen_dump() to save the current display
content (b&w and greyscale overlay) to an 8-bit BMP file. */
static void grey_screendump_hook(int fd)
{
int i;
int y, gx, gy;
#if LCD_PIXELFORMAT == VERTICAL_PACKING
#if LCD_DEPTH == 1
unsigned val;
unsigned mask;
#elif LCD_DEPTH == 2
int shift;
#endif
#elif LCD_PIXELFORMAT == VERTICAL_INTERLEAVED
unsigned data;
int shift;
#endif /* LCD_PIXELFORMAT */
fb_data *src;
unsigned char *gsrc;
unsigned char *dst, *dst_end;
unsigned char linebuf[MAX(4*NUM_SHADES,BMP_LINESIZE)];
rb->write(fd, bmpheader, sizeof(bmpheader)); /* write header */
/* build clut */
rb->memset(linebuf, 0, 4*NUM_SHADES);
dst = linebuf;
for (i = 0; i < NUM_SHADES; i++)
{
*dst++ = (_GREY_MULUQ(BLUE_CMP(LCD_BL_BRIGHTCOLOR)
-BLUE_CMP(LCD_BL_DARKCOLOR), i) >> 7)
+ BLUE_CMP(LCD_BL_DARKCOLOR);
*dst++ = (_GREY_MULUQ(GREEN_CMP(LCD_BL_BRIGHTCOLOR)
-GREEN_CMP(LCD_BL_DARKCOLOR), i) >> 7)
+ GREEN_CMP(LCD_BL_DARKCOLOR);
*dst++ = (_GREY_MULUQ(RED_CMP(LCD_BL_BRIGHTCOLOR)
-RED_CMP(LCD_BL_DARKCOLOR), i) >> 7)
+ RED_CMP(LCD_BL_DARKCOLOR);
dst++;
}
rb->write(fd, linebuf, 4*NUM_SHADES);
#ifdef HAVE_LCD_SPLIT
dst = linebuf;
for (i = 0; i <= NUM_SHADES; i++)
{
*dst++ = (_GREY_MULUQ(BLUE_CMP(LCD_BL_BRIGHTCOLOR_2)
-BLUE_CMP(LCD_BL_DARKCOLOR_2), i) >> 7)
+ BLUE_CMP(LCD_BL_DARKCOLOR_2);
*dst++ = (_GREY_MULUQ(GREEN_CMP(LCD_BL_BRIGHTCOLOR_2)
-GREEN_CMP(LCD_BL_DARKCOLOR_2), i) >> 7)
+ GREEN_CMP(LCD_BL_DARKCOLOR_2);
*dst++ = (_GREY_MULUQ(RED_CMP(LCD_BL_BRIGHTCOLOR_2)
-RED_CMP(LCD_BL_DARKCOLOR_2), i) >> 7)
+ RED_CMP(LCD_BL_DARKCOLOR_2);
dst++;
}
rb->write(fd, linebuf, 4*NUM_SHADES);
#endif
/* BMP image goes bottom -> top */
for (y = LCD_HEIGHT - 1; y >= 0; y--)
{
rb->memset(linebuf, 0, BMP_LINESIZE);
#if defined(HAVE_LCD_SPLIT) && (LCD_SPLIT_LINES == 2)
if (y == LCD_SPLIT_POS - 1)
{
rb->write(fd, linebuf, BMP_LINESIZE);
rb->write(fd, linebuf, BMP_LINESIZE);
}
#endif
dst = linebuf;
dst_end = dst + LCD_WIDTH;
gy = y - _grey_info.y;
gx = -_grey_info.x;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
gsrc = _grey_info.values + _GREY_MULUQ(_grey_info.width, gy);
#if LCD_DEPTH == 2
src = rb->lcd_framebuffer + _GREY_MULUQ(LCD_FBWIDTH, y);
do
{
if (((unsigned)gy < (unsigned)_grey_info.height)
&& ((unsigned)gx < (unsigned)_grey_info.width))
{
*dst++ = *gsrc++;
*dst++ = *gsrc++;
*dst++ = *gsrc++;
*dst++ = *gsrc++;
}
else
{
unsigned data = *src;
*dst++ = colorindex[(data >> 6) & 3];
*dst++ = colorindex[(data >> 4) & 3];
*dst++ = colorindex[(data >> 2) & 3];
*dst++ = colorindex[data & 3];
}
gx++, src++;
}
while (dst < dst_end);
#endif /* LCD_DEPTH */
#elif LCD_PIXELFORMAT == VERTICAL_PACKING
gsrc = _grey_info.values + (~gy & _GREY_BMASK)
+ _GREY_MULUQ(_grey_info.width, gy & ~_GREY_BMASK);
#if LCD_DEPTH == 1
mask = BIT_N(y & 7);
src = rb->lcd_framebuffer + _GREY_MULUQ(LCD_WIDTH, y >> 3);
do
{
if (((unsigned)gy < (unsigned)_grey_info.height)
&& ((unsigned)gx < (unsigned)_grey_info.width))
{
val = *gsrc;
#ifdef HAVE_LCD_SPLIT
val -= val >> 7;
#endif
gsrc += _GREY_BSIZE;
}
else
{
#ifdef HAVE_NEGATIVE_LCD
val = (*src & mask) ? (NUM_SHADES-1) : 0;
#else
val = (*src & mask) ? 0 : (NUM_SHADES-1);
#endif
}
#ifdef HAVE_LCD_SPLIT
if (y < LCD_SPLIT_POS)
val |= 0x80;
#endif
*dst++ = val;
gx++, src++;
}
while (dst < dst_end);
#elif LCD_DEPTH == 2
shift = 2 * (y & 3);
src = rb->lcd_framebuffer + _GREY_MULUQ(LCD_WIDTH, y >> 2);
do
{
if (((unsigned)gy < (unsigned)_grey_info.height)
&& ((unsigned)gx < (unsigned)_grey_info.width))
{
*dst++ = *gsrc;
gsrc += _GREY_BSIZE;
}
else
{
*dst++ = colorindex[(*src >> shift) & 3];
}
gx++, src++;
}
while (dst < dst_end);
#endif /* LCD_DEPTH */
#elif LCD_PIXELFORMAT == VERTICAL_INTERLEAVED
gsrc = _grey_info.values + (~gy & _GREY_BMASK)
+ _GREY_MULUQ(_grey_info.width, gy & ~_GREY_BMASK);
#if LCD_DEPTH == 2
shift = y & 7;
src = rb->lcd_framebuffer + _GREY_MULUQ(LCD_WIDTH, y >> 3);
do
{
if (((unsigned)gy < (unsigned)_grey_info.height)
&& ((unsigned)gx < (unsigned)_grey_info.width))
{
*dst++ = *gsrc;
gsrc += _GREY_BSIZE;
}
else
{
data = (*src >> shift) & 0x0101;
*dst++ = colorindex[((data >> 7) | data) & 3];
}
gx++, src++;
}
while (dst < dst_end);
#endif /* LCD_DEPTH */
#endif /* LCD_PIXELFORMAT */
rb->write(fd, linebuf, BMP_LINESIZE);
}
}
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