starred/OpenEPaperLink
1
0
Fork 0
mirror of https://github.com/OpenEPaperLink/OpenEPaperLink.git synced 2026-03-21 09:04:24 +01:00
Code Issues 1.0k Packages Projects Releases 10 Wiki Activity
Files
1cb948e0b67a6e47c75f2fc5416436ccc8663490
OpenEPaperLink/ESP32_AP-Flasher/src/makeimage.cpp
Nic Limper b4836e81f3 tag flasher / timestamp content / bugfixes (#217) 
- added webinterface for tag flasher
- added tcp transport for communicating with tag flasher (OTG USB also still works)
- added content 'timestamp', makes use of preloaded images and buttons on the 2.9" M3
- webinterface is now aware of C6 and flasher capabilities
- AP can run without ieee801.15.4 radio (i.e. flasher only) by shorting FLASHER_AP_TXD and FLASHER_AP_RXD
- added tcp transport option to OEPL-Flasher.py (serial also still works)
- added new environment OpenEPaperLink_Mini_AP_v4
- lots of finetuning and bug fixes
2024-02-04 20:30:52 +01:00

376 lines
13 KiB
C++
Raw Blame History

#include <Arduino.h>
#include <FS.h>
#include <TFT_eSPI.h>
#include <TJpg_Decoder.h>
#include <makeimage.h>
#include <web.h>
#include "leds.h"
#include "miniz-oepl.h"
#include "storage.h"
#include "util.h"
#ifdef HAS_TFT
#include "ips_display.h"
#endif
TFT_eSPI tft = TFT_eSPI();
TFT_eSprite spr = TFT_eSprite(&tft);
bool spr_output(int16_t x, int16_t y, uint16_t w, uint16_t h, uint16_t *bitmap) {
spr.pushImage(x, y, w, h, bitmap);
return 1;
}
void jpg2buffer(String filein, String fileout, imgParam &imageParams) {
TJpgDec.setSwapBytes(true);
TJpgDec.setJpgScale(1);
TJpgDec.setCallback(spr_output);
uint16_t w = 0, h = 0;
if (filein.c_str()[0] != '/') {
filein = "/" + filein;
}
TJpgDec.getFsJpgSize(&w, &h, filein, *contentFS);
if (w == 0 && h == 0) {
wsErr("invalid jpg");
return;
}
Serial.println("jpeg conversion " + String(w) + "x" + String(h));
#ifdef BOARD_HAS_PSRAM
spr.setColorDepth(16);
#else
spr.setColorDepth(8);
#endif
spr.createSprite(w, h);
if (spr.getPointer() == nullptr) {
wsErr("low on memory. Fallback to 1bpp");
util::printLargestFreeBlock();
spr.setColorDepth(1);
spr.setBitmapColor(TFT_WHITE, TFT_BLACK);
imageParams.bufferbpp = 1;
spr.createSprite(w, h);
}
if (spr.getPointer() == nullptr) {
wsErr("Failed to create sprite in jpg2buffer");
} else {
spr.fillSprite(TFT_WHITE);
TJpgDec.drawFsJpg(0, 0, filein, *contentFS);
spr2buffer(spr, fileout, imageParams);
spr.deleteSprite();
}
}
struct Color {
uint8_t r, g, b;
Color() : r(0), g(0), b(0) {}
Color(uint16_t value_) : r((value_ >> 8) & 0xF8 | (value_ >> 13) & 0x07), g((value_ >> 3) & 0xFC | (value_ >> 9) & 0x03), b((value_ << 3) & 0xF8 | (value_ >> 2) & 0x07) {}
Color(uint8_t r_, uint8_t g_, uint8_t b_) : r(r_), g(g_), b(b_) {}
};
struct Error {
int32_t r;
int32_t g;
int32_t b;
};
uint32_t colorDistance(Color &c1, Color &c2, Error &e1) {
e1.r = constrain(e1.r, -255, 255);
e1.g = constrain(e1.g, -255, 255);
e1.b = constrain(e1.b, -255, 255);
int32_t r_diff = c1.r + e1.r - c2.r;
int32_t g_diff = c1.g + e1.g - c2.g;
int32_t b_diff = c1.b + e1.b - c2.b;
return 3 * r_diff * r_diff + 6 * g_diff * g_diff + b_diff * b_diff;
}
void spr2color(TFT_eSprite &spr, imgParam &imageParams, uint8_t *buffer, size_t buffer_size, bool is_red) {
uint8_t rotate = imageParams.rotate;
long bufw = spr.width(), bufh = spr.height();
if (imageParams.rotatebuffer) {
rotate = (rotate + 3) % 4;
bufw = spr.height();
bufh = spr.width();
}
memset(buffer, 0, buffer_size);
std::vector<Color> palette = {
{255, 255, 255}, // White
{0, 0, 0}, // Black
{255, 0, 0} // Red
};
if (imageParams.invert == 1) {
std::swap(palette[0], palette[1]);
}
Color color;
if (imageParams.dither == 2) {
color = {128, 128, 128};
palette.push_back(color);
color = {211, 211, 211};
palette.push_back(color);
color = {255, 192, 203};
palette.push_back(color);
} else if (imageParams.grayLut) {
color = {160, 160, 160};
palette.push_back(color);
Serial.println("rendering with gray");
}
int num_colors = palette.size();
if (imageParams.bufferbpp == 1) num_colors = 2;
Error *error_bufferold = new Error[bufw + 4];
Error *error_buffernew = new Error[bufw + 4];
memset(error_bufferold, 0, bufw * sizeof(Error));
for (uint16_t y = 0; y < bufh; y++) {
memset(error_buffernew, 0, bufw * sizeof(Error));
for (uint16_t x = 0; x < bufw; x++) {
switch (rotate) {
case 0:
color = Color(spr.readPixel(x, y));
break;
case 1:
color = Color(spr.readPixel(y, bufw - 1 - x));
break;
case 2:
color = Color(spr.readPixel(bufw - 1 - x, bufh - 1 - y));
break;
case 3:
color = Color(spr.readPixel(bufh - 1 - y, x));
break;
}
int best_color_index = 0;
uint32_t best_color_distance = colorDistance(color, palette[0], error_bufferold[x]);
for (int i = 1; i < num_colors; i++) {
if (best_color_distance == 0) break;
uint32_t distance = colorDistance(color, palette[i], error_bufferold[x]);
if (distance < best_color_distance) {
best_color_distance = distance;
best_color_index = i;
}
}
uint8_t bitIndex = 7 - (x % 8);
uint32_t byteIndex = (y * bufw + x) / 8;
// this looks a bit ugly, but it's performing better than shorter notations
switch (best_color_index) {
case 1:
if (!is_red)
buffer[byteIndex] |= (1 << bitIndex);
break;
case 2:
imageParams.hasRed = true;
if (is_red)
buffer[byteIndex] |= (1 << bitIndex);
break;
case 3:
if (imageParams.grayLut) {
buffer[byteIndex] |= (1 << bitIndex);
imageParams.hasRed = true;
} else {
if (!is_red && (x + y) % 2) buffer[byteIndex] |= (1 << bitIndex);
}
break;
case 4:
if (!is_red && ((x + y / 2) % 2 == 0) && (y % 2 == 0)) buffer[byteIndex] |= (1 << bitIndex);
break;
case 5:
if (is_red && (x + y) % 2) buffer[byteIndex] |= (1 << bitIndex);
imageParams.hasRed = true;
break;
}
if (imageParams.dither == 1) {
Error error = {
color.r + error_bufferold[x].r - palette[best_color_index].r,
color.g + error_bufferold[x].g - palette[best_color_index].g,
color.b + error_bufferold[x].b - palette[best_color_index].b};
// Burkes Dithering
error_buffernew[x].r += error.r >> 2;
error_buffernew[x].g += error.g >> 2;
error_buffernew[x].b += error.b >> 2;
if (x > 0) {
error_buffernew[x - 1].r += error.r >> 3;
error_buffernew[x - 1].g += error.g >> 3;
error_buffernew[x - 1].b += error.b >> 3;
}
if (x > 1) {
error_buffernew[x - 2].r += error.r >> 4;
error_buffernew[x - 2].g += error.g >> 4;
error_buffernew[x - 2].b += error.b >> 4;
}
error_buffernew[x + 1].r += error.r >> 3;
error_buffernew[x + 1].g += error.g >> 3;
error_buffernew[x + 1].b += error.b >> 3;
error_bufferold[x + 1].r += error.r >> 2;
error_bufferold[x + 1].g += error.g >> 2;
error_bufferold[x + 1].b += error.b >> 2;
error_buffernew[x + 2].r += error.r >> 4;
error_buffernew[x + 2].g += error.g >> 4;
error_buffernew[x + 2].b += error.b >> 4;
error_bufferold[x + 2].r += error.r >> 3;
error_bufferold[x + 2].g += error.g >> 3;
error_bufferold[x + 2].b += error.b >> 3;
}
}
memcpy(error_bufferold, error_buffernew, bufw * sizeof(Error));
}
delete[] error_buffernew;
delete[] error_bufferold;
return;
}
size_t prepareHeader(uint8_t headerbuf[], uint16_t bufw, uint16_t bufh, imgParam imageParams, size_t buffer_size) {
size_t totalbytes;
uint8_t headersize = 6;
headerbuf[0] = headersize;
memcpy(headerbuf + (imageParams.rotatebuffer == 1 ? 3 : 1), &bufw, sizeof(uint16_t));
memcpy(headerbuf + (imageParams.rotatebuffer == 1 ? 1 : 3), &bufh, sizeof(uint16_t));
if (imageParams.hasRed && imageParams.bpp > 1) {
totalbytes = buffer_size * 2 + headersize;
headerbuf[5] = 2;
} else {
totalbytes = buffer_size + headersize;
headerbuf[5] = 1;
}
return totalbytes;
}
bool initializeCompressor(Miniz::tdefl_compressor *comp, int flags) {
return Miniz::tdefl_init(comp, NULL, NULL, flags) == Miniz::TDEFL_STATUS_OKAY;
}
size_t compressAndWrite(Miniz::tdefl_compressor *comp, const void *inbuf, size_t inbytes, void *zlibbuf, size_t outsize, size_t totalbytes, File &f_out, Miniz::tdefl_flush flush) {
size_t inbytes_compressed = inbytes;
size_t outbytes_compressed = outsize;
uint32_t t = millis();
tdefl_compress(comp, inbuf, &inbytes_compressed, zlibbuf, &outbytes_compressed, flush);
Serial.printf("zlib: compressed %d into %d bytes in %d ms\n", inbytes_compressed, outbytes_compressed, millis()-t);
f_out.write((const uint8_t *)zlibbuf, outbytes_compressed);
return outbytes_compressed;
}
void rewriteHeader(File &f_out) {
// https://www.rfc-editor.org/rfc/rfc1950
const uint8_t cmf = 0x48;
uint8_t flg, flevel = 3;
uint16_t header = cmf << 8 | (flevel << 6);
header += 31 - (header % 31);
flg = header & 0xFF;
f_out.seek(4);
f_out.write(cmf);
f_out.write(flg);
}
void spr2buffer(TFT_eSprite &spr, String &fileout, imgParam &imageParams) {
long t = millis();
#ifdef HAS_TFT
extern uint8_t YellowSense;
if (fileout == "direct") {
if (tftOverride == false) {
TFT_eSprite spr2 = TFT_eSprite(&tft2);
tft2.setRotation(YellowSense == 1 ? 1 : 3);
spr2.createSprite(spr.width(), spr.height());
spr2.setColorDepth(spr.getColorDepth());
void *spriteData = spr.getPointer();
void *spriteData2 = spr2.getPointer();
size_t dataSize = spr.width() * spr.height() * (spr.getColorDepth() / 8);
memcpy(spriteData2, spriteData, dataSize);
spr2.pushSprite(0, 0);
}
return;
}
#endif
xSemaphoreTake(fsMutex, portMAX_DELAY);
fs::File f_out = contentFS->open(fileout, "w");
switch (imageParams.bpp) {
case 1:
case 2: {
long bufw = spr.width(), bufh = spr.height();
size_t buffer_size = (bufw * bufh) / 8;
#ifdef BOARD_HAS_PSRAM
uint8_t *buffer = (uint8_t *)ps_malloc(buffer_size);
#else
uint8_t *buffer = (uint8_t *)malloc(buffer_size);
imageParams.zlib = 0;
#endif
if (!buffer) {
Serial.println("Failed to allocate buffer");
util::printLargestFreeBlock();
f_out.close();
xSemaphoreGive(fsMutex);
return;
}
spr2color(spr, imageParams, buffer, buffer_size, false);
if (imageParams.zlib) {
Miniz::tdefl_compressor *comp;
comp = (Miniz::tdefl_compressor *)malloc(sizeof(Miniz::tdefl_compressor));
uint8_t headerbuf[6];
size_t totalbytes = prepareHeader(headerbuf, bufw, bufh, imageParams, buffer_size);
char *zlibbuf = (char *)malloc(totalbytes * 1.3);
f_out.write(reinterpret_cast<uint8_t *>(&totalbytes), sizeof(uint32_t));
if (comp == NULL || zlibbuf == NULL || totalbytes == 0 || !initializeCompressor(comp, Miniz::TDEFL_WRITE_ZLIB_HEADER | 1500)) {
Serial.println("Failed to initialize compressor or allocate memory for zlib");
if (zlibbuf != NULL) free(zlibbuf);
if (comp != NULL) free(comp);
break;
}
size_t bufferstart = compressAndWrite(comp, headerbuf, sizeof(headerbuf), zlibbuf, buffer_size, totalbytes, f_out, Miniz::TDEFL_NO_FLUSH);
compressAndWrite(comp, buffer, buffer_size, zlibbuf + bufferstart, buffer_size, buffer_size, f_out, (headerbuf[5] == 2 ? Miniz::TDEFL_SYNC_FLUSH : Miniz::TDEFL_FINISH));
if (headerbuf[5] == 2) {
spr2color(spr, imageParams, buffer, buffer_size, true);
compressAndWrite(comp, buffer, buffer_size, zlibbuf, buffer_size, buffer_size, f_out, Miniz::TDEFL_FINISH);
}
rewriteHeader(f_out);
free(zlibbuf);
free(comp);
} else {
f_out.write(buffer, buffer_size);
if (imageParams.hasRed && imageParams.bpp > 1) {
spr2color(spr, imageParams, buffer, buffer_size, true);
f_out.write(buffer, buffer_size);
}
}
free(buffer);
} break;
case 16: {
size_t spriteDataSize = (spr.getColorDepth() == 1) ? (spr.width() * spr.height() / 8) : ((spr.getColorDepth() == 8) ? (spr.width() * spr.height()) : ((spr.getColorDepth() == 16) ? (spr.width() * spr.height() * 2) : 0));
f_out.write((const uint8_t *)spr.getPointer(), spriteDataSize);
} break;
}
f_out.close();
xSemaphoreGive(fsMutex);
Serial.println("finished writing buffer " + String(millis() - t) + "ms");
}
Reference in New Issue View Git Blame Copy Permalink