From e62a7ed49800dfae0337f5d62d12e1fcae8431fb Mon Sep 17 00:00:00 2001 From: BlackMark Date: Sat, 4 Jun 2022 13:24:04 +0200 Subject: [PATCH] Implement basic font rendering --- eink.hpp | 130 +++++++++++++++++++++++++++++++++++++------------- font.hpp | 142 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 239 insertions(+), 33 deletions(-) create mode 100644 font.hpp diff --git a/eink.hpp b/eink.hpp index fb9dbb8..ce545fc 100644 --- a/eink.hpp +++ b/eink.hpp @@ -6,8 +6,10 @@ #include #include +#include #include "eink_spi.hpp" +#include "font.hpp" #include "otp.hpp" #include "../clock.hpp" @@ -81,8 +83,9 @@ class Eink { sendData(0x01); setDataEntryMode(RamDirection::DECREMENT, RamDirection::INCREMENT, FastestMovingIndex::X); - - setRamRange({Width / 8 - 1, 0}, {0, Height - 1}); + setRamRange(); + setRamXPos(); + setRamYPos(); sendCommand(Cmd::BORDER_WAVEFORM_CONTROL); sendData(0x05); @@ -90,9 +93,6 @@ class Eink { sendCommand(Cmd::READ_TEMPERATURE_SENSOR); sendData(0x80); - setRamXPos(Width / 8 - 1); - setRamYPos(0); - waitUntilIdle(); } @@ -142,20 +142,31 @@ class Eink { waitUntilIdle(); } - template - static void draw(const RleImage &rleImage) + static void update() { - draw(rleImage, original_lut_tag{}); + update(original_lut_tag{}); } - template - static void draw(const RleImage &rleImage, const Lut &lut) + template + static void update(const Lut &lut) { constexpr auto USE_ORIGINAL_LUT = std::is_same_v; if constexpr (!USE_ORIGINAL_LUT) { writeLut(lut); } + sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2); + sendData(USE_ORIGINAL_LUT ? 0xF7 : 0xC7); + sendCommand(Cmd::UPDATE_DISPLAY); + waitUntilIdle(); + } + + template + static void draw(const RleImage &rleImage) + { + setRamXPos(); + setRamYPos(); + constexpr auto sendImageChannel = [](const auto command, const auto &image) { using image_t = std::remove_cvref_t; @@ -174,15 +185,13 @@ class Eink { sendImageChannel(Cmd::WRITE_RAM_BLACK, std::get<0>(rleImage.value)); sendImageChannel(Cmd::WRITE_RAM_RED, std::get<1>(rleImage.value)); - - sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2); - sendData(USE_ORIGINAL_LUT ? 0xF7 : 0xC7); - sendCommand(Cmd::UPDATE_DISPLAY); - waitUntilIdle(); } static void clear(const Color color = Color::WHITE) { + setRamXPos(); + setRamYPos(); + constexpr auto getFillData = [](const auto &color) -> std::pair { switch (color) { case Color::BLACK: @@ -205,11 +214,76 @@ class Eink { for (auto i = std::uint16_t{0}; i < Width * Height / 8; i++) { sendData(fillData.second); } + } - sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2); - sendData(0xF7); - sendCommand(Cmd::UPDATE_DISPLAY); - waitUntilIdle(); + static void drawText(const std::pair &pos, const char *text, + const Color textColor = Color::BLACK, const Color backgroundColor = Color::WHITE) + { + const auto textLength = std::strlen(text); + + constexpr auto getXScreenCoordinates = [](const std::uint8_t pos) { return (Width - pos - 1) / 8; }; + constexpr auto flipEndianness = [](const std::uint8_t value) { + auto flippedVal = std::uint8_t{0}; + for (auto i = 0; i < 8; ++i) { + const auto oldBit = (value >> i) & 1; + flippedVal |= oldBit << (8 - i - 1); + } + return flippedVal; + }; + + const auto adjustColor = [&](const auto &data, const auto command) { + auto backgroundData = data; + auto outData = data & 0x00; + + if (command == Cmd::WRITE_RAM_BLACK) { + if (backgroundColor == Color::BLACK) { + backgroundData = 0x00; + } else if (backgroundColor == Color::RED || backgroundColor == Color::WHITE) { + backgroundData = 0xFF; + } + + if (textColor == Color::BLACK) { + outData = backgroundData & ~data; + } else if (textColor == Color::RED || textColor == Color::WHITE) { + outData = backgroundData | data; + } + } else { + if (backgroundColor == Color::BLACK || backgroundColor == Color::WHITE) { + backgroundData = 0x00; + } else if (backgroundColor == Color::RED) { + backgroundData = 0xFF; + } + + if (textColor == Color::BLACK || textColor == Color::WHITE) { + outData = backgroundData & ~data; + } else if (textColor == Color::RED) { + outData = backgroundData | data; + } + } + + return outData; + }; + + const auto sendChannel = [&](const auto command) { + for (auto i = std::size_t{0}; i < textLength; ++i) { + const auto posX = pos.first + i * 8; + const auto screenPosX = getXScreenCoordinates(posX); + setRamRange({screenPosX, screenPosX}, {pos.second, pos.second + 7}); + setRamXPos(screenPosX); + setRamYPos(pos.second); + + sendCommand(command); + for (auto j = std::uint8_t{0}; j < 8; ++j) { + const auto fontByte = flash::loadLike(FONT_8X8.value[text[i]][j]); + static_assert(std::is_same_v, std::uint8_t>); + const auto dataByte = adjustColor(flipEndianness(fontByte), command); + sendData(dataByte); + } + } + }; + + sendChannel(Cmd::WRITE_RAM_BLACK); + sendChannel(Cmd::WRITE_RAM_RED); } template @@ -240,11 +314,6 @@ class Eink { sendCommand(BLACK_PATTERN_FILL_CMD); sendData(BLACK_PATTERN); waitUntilIdle(); - - sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2); - sendData(0xF7); - sendCommand(Cmd::UPDATE_DISPLAY); - waitUntilIdle(); } static void setDataEntryMode(const RamDirection &xDir = RamDirection::INCREMENT, @@ -259,8 +328,8 @@ class Eink { sendData(setting); } - static void setRamRange(const std::pair &xrange, - const std::pair &yrange) + static void setRamRange(const std::pair &xrange = {Width / 8 - 1, 0}, + const std::pair &yrange = {0, Height - 1}) { sendCommand(Cmd::SET_RAM_X_ADDR_POSITIONS); sendData(xrange.first & 0b00111111); @@ -273,13 +342,13 @@ class Eink { sendData((yrange.second >> 8) & 0b1); } - static void setRamXPos(const std::uint8_t pos) + static void setRamXPos(const std::uint8_t pos = Width / 8 - 1) { sendCommand(Cmd::SET_RAM_X_ADDR); sendData(pos & 0b00111111); } - static void setRamYPos(const std::uint16_t pos) + static void setRamYPos(const std::uint16_t pos = 0) { sendCommand(Cmd::SET_RAM_Y_ADDR); sendData(pos & 0xFF); @@ -309,11 +378,6 @@ class Eink { sendData(0x00); } - sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2); - sendData(0xF7); - sendCommand(Cmd::UPDATE_DISPLAY); - waitUntilIdle(); - ////////////////////////////////////////////////////////////////////////// sendCommand(Cmd::DISPLAY_UPDATE_CONTROL_2); diff --git a/font.hpp b/font.hpp new file mode 100644 index 0000000..699758b --- /dev/null +++ b/font.hpp @@ -0,0 +1,142 @@ +#pragma once + +#include + +#include + +#include "../flash/flash.hpp" + +namespace eink { + +constexpr auto FONT_8X8 = flash::Wrapper{std::to_array>({ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0000 (nul) + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0001 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0002 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0003 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0004 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0005 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0006 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0007 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0008 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0009 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000A + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000B + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000C + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000D + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000E + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+000F + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0010 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0011 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0012 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0013 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0014 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0015 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0016 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0017 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0018 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0019 + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001A + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001B + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001C + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001D + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001E + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+001F + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0020 (space) + {0x18, 0x3C, 0x3C, 0x18, 0x18, 0x00, 0x18, 0x00}, // U+0021 (!) + {0x36, 0x36, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0022 (") + {0x36, 0x36, 0x7F, 0x36, 0x7F, 0x36, 0x36, 0x00}, // U+0023 (#) + {0x0C, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x0C, 0x00}, // U+0024 ($) + {0x00, 0x63, 0x33, 0x18, 0x0C, 0x66, 0x63, 0x00}, // U+0025 (%) + {0x1C, 0x36, 0x1C, 0x6E, 0x3B, 0x33, 0x6E, 0x00}, // U+0026 (&) + {0x06, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0027 (') + {0x18, 0x0C, 0x06, 0x06, 0x06, 0x0C, 0x18, 0x00}, // U+0028 (() + {0x06, 0x0C, 0x18, 0x18, 0x18, 0x0C, 0x06, 0x00}, // U+0029 ()) + {0x00, 0x66, 0x3C, 0xFF, 0x3C, 0x66, 0x00, 0x00}, // U+002A (*) + {0x00, 0x0C, 0x0C, 0x3F, 0x0C, 0x0C, 0x00, 0x00}, // U+002B (+) + {0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x06}, // U+002C (,) + {0x00, 0x00, 0x00, 0x3F, 0x00, 0x00, 0x00, 0x00}, // U+002D (-) + {0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x00}, // U+002E (.) + {0x60, 0x30, 0x18, 0x0C, 0x06, 0x03, 0x01, 0x00}, // U+002F (/) + {0x3E, 0x63, 0x73, 0x7B, 0x6F, 0x67, 0x3E, 0x00}, // U+0030 (0) + {0x0C, 0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x3F, 0x00}, // U+0031 (1) + {0x1E, 0x33, 0x30, 0x1C, 0x06, 0x33, 0x3F, 0x00}, // U+0032 (2) + {0x1E, 0x33, 0x30, 0x1C, 0x30, 0x33, 0x1E, 0x00}, // U+0033 (3) + {0x38, 0x3C, 0x36, 0x33, 0x7F, 0x30, 0x78, 0x00}, // U+0034 (4) + {0x3F, 0x03, 0x1F, 0x30, 0x30, 0x33, 0x1E, 0x00}, // U+0035 (5) + {0x1C, 0x06, 0x03, 0x1F, 0x33, 0x33, 0x1E, 0x00}, // U+0036 (6) + {0x3F, 0x33, 0x30, 0x18, 0x0C, 0x0C, 0x0C, 0x00}, // U+0037 (7) + {0x1E, 0x33, 0x33, 0x1E, 0x33, 0x33, 0x1E, 0x00}, // U+0038 (8) + {0x1E, 0x33, 0x33, 0x3E, 0x30, 0x18, 0x0E, 0x00}, // U+0039 (9) + {0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x00}, // U+003A (:) + {0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x06}, // U+003B (;) + {0x18, 0x0C, 0x06, 0x03, 0x06, 0x0C, 0x18, 0x00}, // U+003C (<) + {0x00, 0x00, 0x3F, 0x00, 0x00, 0x3F, 0x00, 0x00}, // U+003D (=) + {0x06, 0x0C, 0x18, 0x30, 0x18, 0x0C, 0x06, 0x00}, // U+003E (>) + {0x1E, 0x33, 0x30, 0x18, 0x0C, 0x00, 0x0C, 0x00}, // U+003F (?) + {0x3E, 0x63, 0x7B, 0x7B, 0x7B, 0x03, 0x1E, 0x00}, // U+0040 (@) + {0x0C, 0x1E, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x00}, // U+0041 (A) + {0x3F, 0x66, 0x66, 0x3E, 0x66, 0x66, 0x3F, 0x00}, // U+0042 (B) + {0x3C, 0x66, 0x03, 0x03, 0x03, 0x66, 0x3C, 0x00}, // U+0043 (C) + {0x1F, 0x36, 0x66, 0x66, 0x66, 0x36, 0x1F, 0x00}, // U+0044 (D) + {0x7F, 0x46, 0x16, 0x1E, 0x16, 0x46, 0x7F, 0x00}, // U+0045 (E) + {0x7F, 0x46, 0x16, 0x1E, 0x16, 0x06, 0x0F, 0x00}, // U+0046 (F) + {0x3C, 0x66, 0x03, 0x03, 0x73, 0x66, 0x7C, 0x00}, // U+0047 (G) + {0x33, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x33, 0x00}, // U+0048 (H) + {0x1E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00}, // U+0049 (I) + {0x78, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E, 0x00}, // U+004A (J) + {0x67, 0x66, 0x36, 0x1E, 0x36, 0x66, 0x67, 0x00}, // U+004B (K) + {0x0F, 0x06, 0x06, 0x06, 0x46, 0x66, 0x7F, 0x00}, // U+004C (L) + {0x63, 0x77, 0x7F, 0x7F, 0x6B, 0x63, 0x63, 0x00}, // U+004D (M) + {0x63, 0x67, 0x6F, 0x7B, 0x73, 0x63, 0x63, 0x00}, // U+004E (N) + {0x1C, 0x36, 0x63, 0x63, 0x63, 0x36, 0x1C, 0x00}, // U+004F (O) + {0x3F, 0x66, 0x66, 0x3E, 0x06, 0x06, 0x0F, 0x00}, // U+0050 (P) + {0x1E, 0x33, 0x33, 0x33, 0x3B, 0x1E, 0x38, 0x00}, // U+0051 (Q) + {0x3F, 0x66, 0x66, 0x3E, 0x36, 0x66, 0x67, 0x00}, // U+0052 (R) + {0x1E, 0x33, 0x07, 0x0E, 0x38, 0x33, 0x1E, 0x00}, // U+0053 (S) + {0x3F, 0x2D, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00}, // U+0054 (T) + {0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x3F, 0x00}, // U+0055 (U) + {0x33, 0x33, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00}, // U+0056 (V) + {0x63, 0x63, 0x63, 0x6B, 0x7F, 0x77, 0x63, 0x00}, // U+0057 (W) + {0x63, 0x63, 0x36, 0x1C, 0x1C, 0x36, 0x63, 0x00}, // U+0058 (X) + {0x33, 0x33, 0x33, 0x1E, 0x0C, 0x0C, 0x1E, 0x00}, // U+0059 (Y) + {0x7F, 0x63, 0x31, 0x18, 0x4C, 0x66, 0x7F, 0x00}, // U+005A (Z) + {0x1E, 0x06, 0x06, 0x06, 0x06, 0x06, 0x1E, 0x00}, // U+005B ([) + {0x03, 0x06, 0x0C, 0x18, 0x30, 0x60, 0x40, 0x00}, // U+005C (\) + {0x1E, 0x18, 0x18, 0x18, 0x18, 0x18, 0x1E, 0x00}, // U+005D (]) + {0x08, 0x1C, 0x36, 0x63, 0x00, 0x00, 0x00, 0x00}, // U+005E (^) + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF}, // U+005F (_) + {0x0C, 0x0C, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+0060 (`) + {0x00, 0x00, 0x1E, 0x30, 0x3E, 0x33, 0x6E, 0x00}, // U+0061 (a) + {0x07, 0x06, 0x06, 0x3E, 0x66, 0x66, 0x3B, 0x00}, // U+0062 (b) + {0x00, 0x00, 0x1E, 0x33, 0x03, 0x33, 0x1E, 0x00}, // U+0063 (c) + {0x38, 0x30, 0x30, 0x3e, 0x33, 0x33, 0x6E, 0x00}, // U+0064 (d) + {0x00, 0x00, 0x1E, 0x33, 0x3f, 0x03, 0x1E, 0x00}, // U+0065 (e) + {0x1C, 0x36, 0x06, 0x0f, 0x06, 0x06, 0x0F, 0x00}, // U+0066 (f) + {0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x1F}, // U+0067 (g) + {0x07, 0x06, 0x36, 0x6E, 0x66, 0x66, 0x67, 0x00}, // U+0068 (h) + {0x0C, 0x00, 0x0E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00}, // U+0069 (i) + {0x30, 0x00, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E}, // U+006A (j) + {0x07, 0x06, 0x66, 0x36, 0x1E, 0x36, 0x67, 0x00}, // U+006B (k) + {0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00}, // U+006C (l) + {0x00, 0x00, 0x33, 0x7F, 0x7F, 0x6B, 0x63, 0x00}, // U+006D (m) + {0x00, 0x00, 0x1F, 0x33, 0x33, 0x33, 0x33, 0x00}, // U+006E (n) + {0x00, 0x00, 0x1E, 0x33, 0x33, 0x33, 0x1E, 0x00}, // U+006F (o) + {0x00, 0x00, 0x3B, 0x66, 0x66, 0x3E, 0x06, 0x0F}, // U+0070 (p) + {0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x78}, // U+0071 (q) + {0x00, 0x00, 0x3B, 0x6E, 0x66, 0x06, 0x0F, 0x00}, // U+0072 (r) + {0x00, 0x00, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x00}, // U+0073 (s) + {0x08, 0x0C, 0x3E, 0x0C, 0x0C, 0x2C, 0x18, 0x00}, // U+0074 (t) + {0x00, 0x00, 0x33, 0x33, 0x33, 0x33, 0x6E, 0x00}, // U+0075 (u) + {0x00, 0x00, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00}, // U+0076 (v) + {0x00, 0x00, 0x63, 0x6B, 0x7F, 0x7F, 0x36, 0x00}, // U+0077 (w) + {0x00, 0x00, 0x63, 0x36, 0x1C, 0x36, 0x63, 0x00}, // U+0078 (x) + {0x00, 0x00, 0x33, 0x33, 0x33, 0x3E, 0x30, 0x1F}, // U+0079 (y) + {0x00, 0x00, 0x3F, 0x19, 0x0C, 0x26, 0x3F, 0x00}, // U+007A (z) + {0x38, 0x0C, 0x0C, 0x07, 0x0C, 0x0C, 0x38, 0x00}, // U+007B ({) + {0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00}, // U+007C (|) + {0x07, 0x0C, 0x0C, 0x38, 0x0C, 0x0C, 0x07, 0x00}, // U+007D (}) + {0x6E, 0x3B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, // U+007E (~) + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} // U+007F +})}; + +} // namespace eink