/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * 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" #include "fixedpoint.h" #if defined(HAVE_ADJUSTABLE_CPU_FREQ) && \ (defined(CPU_PP) || (CONFIG_LCD == LCD_TL0350A)) #define NEED_BOOST #endif #ifndef SIMULATOR #if 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 /* TODO: calibrate */ 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 */ #elif defined SANSA_CLIPV2 /* TODO: calibrate */ 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 74 /* Hz */ #elif defined SANSA_CLIPPLUS /* TODO: calibrate */ 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 80 /* Hz */ #elif defined MPIO_HD200 /* matrix generated in the following way * 1) run 5 times test_grey * 2) average results (joint points) * 3) plot full matrix obtained by natural cubic b-spline interpolation * 4) hand tweak joint points to smooth the curve * 5) repeat steps 3 and 4 until interpolated curve is smooth */ static const unsigned char lcdlinear[256] = { 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 16, 17, 17, 18, 18, 18, 19, 19, 20, 20, 20, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, 26, 26, 27, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 32, 33, 33, 34, 35, 35, 36, 36, 37, 37, 38, 39, 39, 40, 41, 41, 42, 43, 43, 44, 45, 45, 46, 46, 47, 48, 49, 49, 50, 51, 51, 52, 53, 53, 54, 55, 56, 56, 57, 58, 58, 59, 60, 61, 61, 62, 63, 64, 64, 65, 66, 67, 68, 68, 69, 70, 71, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 108, 109, 110, 111, 113, 114, 115, 117, 118, 120, 121, 123, 125, 126, 128, 130, 131, 133, 135, 137, 139, 140, 142, 144, 146, 147, 149, 151, 152, 154, 156, 157, 159, 161, 162, 164, 166, 167, 169, 170, 172, 173, 175, 176, 177, 179, 180, 182, 183, 184, 186, 187, 189, 190, 191, 193, 194, 195, 197, 198, 199, 201, 202, 203, 205, 206, 207, 208, 210, 211, 212, 213, 214, 215, 217, 218, 219, 220, 221, 222, 223, 224, 225, 227 }; #define LCD_SCANRATE 153 /* Hz */ #elif defined MPIO_HD300 /* 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 */ #else /* not yet calibrated targets - generic linear mapping */ 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 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 */ 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 = fp16_exp((_GREY_GAMMA * fp16_log(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; /* default viewport and settings */ grey_set_viewport(NULL); grey_viewport_set_fullscreen(NULL, SCREEN_MAIN); grey_set_framebuffer(NULL); /* 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) { fb_data *lcd_fb; struct viewport *vp_main = rb->lcd_set_viewport(NULL); rb->viewport_set_fullscreen(vp_main, SCREEN_MAIN); lcd_fb = vp_main->buffer->fb_ptr; 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 = lcd_fb + _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 = lcd_fb + _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 = lcd_fb + _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 = lcd_fb + _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); } }