Initial commit

2026-03-31 13:17:21 +02:00
commit 7eeecff042
6821 changed files with 3514215 additions and 0 deletions
--- a/T-RGB/lib/Arduino_GFX/examples/ImgViewer/ImgViewerJpeg/JpegFunc.h
+++ b/T-RGB/lib/Arduino_GFX/examples/ImgViewer/ImgViewerJpeg/JpegFunc.h
@@ -0,0 +1,106 @@
+/*******************************************************************************
+ * JPEGDEC related function
+ *
+ * Dependent libraries:
+ * JPEGDEC: https://github.com/bitbank2/JPEGDEC.git
+ ******************************************************************************/
+#ifndef _JPEGFUNC_H_
+#define _JPEGFUNC_H_
+
+#include <JPEGDEC.h>
+
+static JPEGDEC _jpeg;
+static File _f;
+static int _x, _y, _x_bound, _y_bound;
+
+static void *jpegOpenFile(const char *szFilename, int32_t *pFileSize)
+{
+    // Serial.println("jpegOpenFile");
+#if defined(ARDUINO_ARCH_SAMD) && defined(SEEED_GROVE_UI_WIRELESS)
+    _f = SD.open(szFilename, "r");
+#elif defined(ARDUINO_RASPBERRY_PI_PICO) || defined(ARDUINO_RASPBERRY_PI_PICO_W)
+    _f = LittleFS.open(szFilename, "r");
+    // _f = SDFS.open(szFilename, "r");
+#elif defined(ESP32)
+    // _f = FFat.open(szFilename, "r");
+    _f = LittleFS.open(szFilename, "r");
+    // _f = SPIFFS.open(szFilename, "r");
+    // _f = SD.open(szFilename, "r");
+#elif defined(ESP8266)
+    _f = LittleFS.open(szFilename, "r");
+    // _f = SD.open(szFilename, "r");
+#else
+    _f = SD.open(szFilename, FILE_READ);
+#endif
+    *pFileSize = _f.size();
+    return &_f;
+}
+
+static void jpegCloseFile(void *pHandle)
+{
+    // Serial.println("jpegCloseFile");
+    File *f = static_cast<File *>(pHandle);
+    f->close();
+}
+
+static int32_t jpegReadFile(JPEGFILE *pFile, uint8_t *pBuf, int32_t iLen)
+{
+    // Serial.printf("jpegReadFile, iLen: %d\n", iLen);
+    File *f = static_cast<File *>(pFile->fHandle);
+    size_t r = f->read(pBuf, iLen);
+    return r;
+}
+
+static int32_t jpegSeekFile(JPEGFILE *pFile, int32_t iPosition)
+{
+    // Serial.printf("jpegSeekFile, pFile->iPos: %d, iPosition: %d\n", pFile->iPos, iPosition);
+    File *f = static_cast<File *>(pFile->fHandle);
+    f->seek(iPosition);
+    return iPosition;
+}
+
+static void jpegDraw(
+    const char *filename, JPEG_DRAW_CALLBACK *jpegDrawCallback, bool useBigEndian,
+    int x, int y, int widthLimit, int heightLimit)
+{
+    _x = x;
+    _y = y;
+    _x_bound = _x + widthLimit - 1;
+    _y_bound = _y + heightLimit - 1;
+
+    _jpeg.open(filename, jpegOpenFile, jpegCloseFile, jpegReadFile, jpegSeekFile, jpegDrawCallback);
+
+    // scale to fit height
+    int _scale;
+    int iMaxMCUs;
+    float ratio = (float)_jpeg.getHeight() / heightLimit;
+    if (ratio <= 1)
+    {
+        _scale = 0;
+        iMaxMCUs = widthLimit / 16;
+    }
+    else if (ratio <= 2)
+    {
+        _scale = JPEG_SCALE_HALF;
+        iMaxMCUs = widthLimit / 8;
+    }
+    else if (ratio <= 4)
+    {
+        _scale = JPEG_SCALE_QUARTER;
+        iMaxMCUs = widthLimit / 4;
+    }
+    else
+    {
+        _scale = JPEG_SCALE_EIGHTH;
+        iMaxMCUs = widthLimit / 2;
+    }
+    _jpeg.setMaxOutputSize(iMaxMCUs);
+    if (useBigEndian)
+    {
+        _jpeg.setPixelType(RGB565_BIG_ENDIAN);
+    }
+    _jpeg.decode(x, y, _scale);
+    _jpeg.close();
+}
+
+#endif // _JPEGFUNC_H_