Update for Adafruit_GFX setAddrWindow() parameter change

Author: Bodmer

examples/Adafruit_GFX/Huzzah_Jpeg/Huzzah_Jpeg.ino

@@ -108,7 +108,7 @@ void setup()
 void loop()
 {
   // Note the / before the SPIFFS file name must be present, this means the file is in
-  // the root directory of the SPIFFS, e.g. "/Tiger.rjpg" for a file called "Tiger.jpg"
+  // the root directory of the SPIFFS, e.g. "/Tiger.jpg" for a file called "Tiger.jpg"
 
   tft.setRotation(0);  // portrait
   tft.fillScreen(random(0xFFFF));

examples/Adafruit_GFX/Huzzah_Jpeg/JPEG_functions.ino

@@ -82,23 +82,28 @@ void jpegRender(int xpos, int ypos) {
     int mcu_x = JpegDec.MCUx * mcu_w + xpos;
     int mcu_y = JpegDec.MCUy * mcu_h + ypos;
 
-    // check if the image block size needs to be changed for the right and bottom edges
+    // check if the image block size needs to be changed for the right edge
     if (mcu_x + mcu_w <= max_x) win_w = mcu_w;
     else win_w = min_w;
+
+    // check if the image block size needs to be changed for the bottom edge
     if (mcu_y + mcu_h <= max_y) win_h = mcu_h;
     else win_h = min_h;
 
-    // calculate how many pixels must be drawn
-    uint32_t mcu_pixels = win_w * win_h;
+    // copy pixels into a contiguous block
+    if (win_w != mcu_w)
+    {
+      for (int h = 1; h < win_h-1; h++)
+      {
+        memcpy(pImg + h * win_w, pImg + (h + 1) * mcu_w, win_w << 1);
+      }
+    }
+
 
     // draw image MCU block only if it will fit on the screen
     if ( ( mcu_x + win_w) <= tft.width() && ( mcu_y + win_h) <= tft.height())
-	{
-      // Now set a MCU bounding window on the TFT to push pixels into (x, y, x + width - 1, y + height - 1)
-      tft.setAddrWindow(mcu_x, mcu_y, mcu_x + win_w - 1, mcu_y + win_h - 1);
-
-      // Write all MCU pixels to the TFT window
-      while (mcu_pixels--) tft.pushColor(*pImg++); // Send MCU buffer to TFT 16 bits at a time
+    {
+      tft.drawRGBBitmap(mcu_x, mcu_y, pImg, win_w, win_h);
     }
 
     // Stop drawing blocks if the bottom of the screen has been reached,

examples/Adafruit_GFX/NodeMCU_Jpeg/JPEG_functions.ino

@@ -82,22 +82,27 @@ void jpegRender(int xpos, int ypos) {
     int mcu_x = JpegDec.MCUx * mcu_w + xpos;
     int mcu_y = JpegDec.MCUy * mcu_h + ypos;
 
-    // check if the image block size needs to be changed for the right and bottom edges
+    // check if the image block size needs to be changed for the right edge
     if (mcu_x + mcu_w <= max_x) win_w = mcu_w;
     else win_w = min_w;
+
+    // check if the image block size needs to be changed for the bottom edge
     if (mcu_y + mcu_h <= max_y) win_h = mcu_h;
     else win_h = min_h;
 
-    // calculate how many pixels must be drawn
-    uint32_t mcu_pixels = win_w * win_h;
+    // copy pixels into a contiguous block
+    if (win_w != mcu_w)
+    {
+      for (int h = 1; h < win_h-1; h++)
+      {
+        memcpy(pImg + h * win_w, pImg + (h + 1) * mcu_w, win_w << 1);
+      }
+    }
 
     // draw image MCU block only if it will fit on the screen
     if ( ( mcu_x + win_w) <= tft.width() && ( mcu_y + win_h) <= tft.height())
-	{
-      // Now set a MCU bounding window on the TFT to push pixels into (x, y, x + width - 1, y + height - 1)
-      tft.setAddrWindow(mcu_x, mcu_y, mcu_x + win_w - 1, mcu_y + win_h - 1);
-      // Write all MCU pixels to the TFT window
-      while (mcu_pixels--) tft.pushColor(*pImg++);
+    {
+      tft.drawRGBBitmap(mcu_x, mcu_y, pImg, win_w, win_h);
     }
 
     else if ( ( mcu_y + win_h) >= tft.height()) JpegDec.abort();

library.json

@@ -1,6 +1,6 @@
 {
   "name": "JPEGDecoder",
-  "version": "1.7.9",
+  "version": "1.8.0",
   "keywords": "jpeg, jpg, decoder, TFT",
   "description": "A JPEG decoder library, tested on Mega, Due and ESP8266",
   "repository":

library.properties

@@ -1,5 +1,5 @@
 name=JPEGDecoder
-version=1.7.9
+version=1.8.0
 author=Bodmer <bodmer@anola.net>, Makoto Kurauchi, Rich Geldreich
 maintainer=Bodmer
 sentence= Jpeg decoder tested with Arduino Mega, Arduino Due and ESP8266 based NodeMCU 1.0

src/JPEGDecoder.cpp

@@ -65,7 +65,7 @@ uint8_t JPEGDecoder::pjpeg_callback(uint8_t* pBuf, uint8_t buf_size, uint8_t *pB
 uint8_t JPEGDecoder::pjpeg_need_bytes_callback(uint8_t* pBuf, uint8_t buf_size, uint8_t *pBytes_actually_read, void *pCallback_data) {
 	uint n;
 
-	pCallback_data;
+	//pCallback_data;
 
 	n = jpg_min(g_nInFileSize - g_nInFileOfs, buf_size);