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/WiFiPhotoFrame/JpegFunc.h
+++ b/T-RGB/lib/Arduino_GFX/examples/WiFiPhotoFrame/JpegFunc.h
@@ -0,0 +1,118 @@
+/*******************************************************************************
+ * 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 int _x, _y, _x_bound, _y_bound;
+
+static void jpegCloseHttpStream(void *pHandle)
+{
+  // printf("jpegCloseHttpStream\n");
+  // WiFiClient *http_stream = (WiFiClient *)pHandle;
+  // do nothing
+}
+
+static int32_t readStream(WiFiClient *http_stream, uint8_t *pBuf, int32_t iLen)
+{
+  uint8_t wait = 0;
+  size_t a = http_stream->available();
+  size_t r = 0;
+  while ((r < iLen) && (wait < 10))
+  {
+    if (a)
+    {
+      wait = 0; // reset wait count once available
+      r += http_stream->readBytes(pBuf + r, iLen - r);
+      // printf("1st byte: %d, 2nd byte: %d, last byte: %d, iLen: %d, r: %d, wait: %d\n", pBuf[0], pBuf[1], pBuf[r - 1], iLen, r, wait);
+    }
+    else
+    {
+      delay(100);
+      wait++;
+    }
+    a = http_stream->available();
+  }
+  return r;
+}
+
+static int32_t jpegReadHttpStream(JPEGFILE *pFile, uint8_t *pBuf, int32_t iLen)
+{
+  // printf("jpegReadHttpStream, iLen: %d\n", iLen);
+  WiFiClient *http_stream = (WiFiClient *)pFile->fHandle;
+  return readStream(http_stream, pBuf, iLen);
+}
+
+static int32_t jpegSeekHttpStream(JPEGFILE *pFile, int32_t iPosition)
+{
+  // printf("jpegSeekHttpStream, pFile->iPos: %d, iPosition: %d\n", pFile->iPos, iPosition);
+  WiFiClient *http_stream = (WiFiClient *)pFile->fHandle;
+  http_stream->readBytes((uint8_t *)nullptr, iPosition - pFile->iPos);
+  return iPosition;
+}
+
+static int jpegOpenHttpStreamWithBuffer(WiFiClient *http_stream, uint8_t *buf, int32_t dataSize, JPEG_DRAW_CALLBACK *jpegDrawCallback)
+{
+  int32_t r = readStream(http_stream, buf, dataSize);
+  if (r != dataSize)
+  {
+    return 0;
+  }
+  return _jpeg.openRAM(buf, dataSize, jpegDrawCallback);
+}
+
+static int jpegOpenHttpStream(WiFiClient *http_stream, int32_t dataSize, JPEG_DRAW_CALLBACK *jpegDrawCallback)
+{
+  return _jpeg.open(http_stream, dataSize, jpegCloseHttpStream, jpegReadHttpStream, jpegSeekHttpStream, jpegDrawCallback);
+}
+
+static int jpegDraw(bool useBigEndian,
+                    int x, int y, int widthLimit, int heightLimit)
+{
+  _x = x;
+  _y = y;
+  _x_bound = _x + widthLimit - 1;
+  _y_bound = _y + heightLimit - 1;
+
+  // 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);
+  }
+  int decode_result = _jpeg.decode(x, y, _scale);
+  _jpeg.close();
+
+  return decode_result;
+}
+
+#endif // _JPEGFUNC_H_