Merge pull request #3539 from Liliputech/pov_display

Added POV image effect

Author: blazoncek

platformio_override.sample.ini

@@ -29,6 +29,8 @@ lib_deps = ${esp8266.lib_deps}
 ;  ;gmag11/QuickESPNow @ ~0.7.0 # will also load QuickDebug
 ;  https://github.com/blazoncek/QuickESPNow.git#optional-debug  ;; exludes debug library
 ;  ${esp32.AR_lib_deps} ;; used for USERMOD_AUDIOREACTIVE
+;  bitbank2/PNGdec@^1.0.1 ;; used for POV display uncomment following
+
 build_unflags = ${common.build_unflags}
 build_flags = ${common.build_flags} ${esp8266.build_flags}
 ;
@@ -152,6 +154,8 @@ build_flags = ${common.build_flags} ${esp8266.build_flags}
 ;   -D TACHO_PIN=33
 ;   -D PWM_PIN=32
 ;
+;  Use POV Display usermod
+;   -D USERMOD_POV_DISPLAY
 ; Use built-in or custom LED as a status indicator (assumes LED is connected to GPIO16)
 ;   -D STATUSLED=16
 ;   

usermods/pov_display/usermod_pov_display.h

@@ -0,0 +1,85 @@
+#pragma once
+#include "wled.h"
+#include <PNGdec.h>
+
+void * openFile(const char *filename, int32_t *size) {
+    f = WLED_FS.open(filename);
+    *size = f.size();
+    return &f;
+}
+
+void closeFile(void *handle) {
+    if (f) f.close();
+}
+
+int32_t readFile(PNGFILE *pFile, uint8_t *pBuf, int32_t iLen)
+{
+    int32_t iBytesRead;
+    iBytesRead = iLen;
+    File *f = static_cast<File *>(pFile->fHandle);
+    // Note: If you read a file all the way to the last byte, seek() stops working
+    if ((pFile->iSize - pFile->iPos) < iLen)
+	iBytesRead = pFile->iSize - pFile->iPos - 1; // <-- ugly work-around
+    if (iBytesRead <= 0)
+	return 0;
+    iBytesRead = (int32_t)f->read(pBuf, iBytesRead);
+    pFile->iPos = f->position();
+    return iBytesRead;
+}
+
+int32_t seekFile(PNGFILE *pFile, int32_t iPosition)
+{
+    int i = micros();
+    File *f = static_cast<File *>(pFile->fHandle);
+    f->seek(iPosition);
+    pFile->iPos = (int32_t)f->position();
+    i = micros() - i;
+    return pFile->iPos;
+}
+
+void draw(PNGDRAW *pDraw) {
+    uint16_t usPixels[SEGLEN];
+    png.getLineAsRGB565(pDraw, usPixels, PNG_RGB565_LITTLE_ENDIAN, 0xffffffff);
+    for(int x=0; x < SEGLEN; x++) {
+	uint16_t color = usPixels[x];
+	byte r = ((color >> 11) & 0x1F);
+	byte g = ((color >> 5) & 0x3F);
+	byte b = (color & 0x1F);
+	SEGMENT.setPixelColor(x, RGBW32(r,g,b,0));
+    }
+    strip.show();
+}
+
+uint16_t mode_pov_image(void) {
+    const char * filepath = SEGMENT.name;
+    int rc = png.open(filepath, openFile, closeFile, readFile, seekFile, draw);
+    if (rc == PNG_SUCCESS) {
+	rc = png.decode(NULL, 0);
+	png.close();
+	return FRAMETIME;
+    }
+    return FRAMETIME;
+}
+
+class PovDisplayUsermod : public Usermod
+{
+  public:
+    static const char _data_FX_MODE_POV_IMAGE[] PROGMEM = "POV Image@!;;;1";
+
+    PNG png;
+    File f;
+
+    void setup() {
+	strip.addEffect(255, &mode_pov_image, _data_FX_MODE_POV_IMAGE);
+    }
+
+    void loop() {
+    }
+
+    uint16_t getId()
+    {
+      return USERMOD_ID_POV_DISPLAY;
+    }
+
+    void connected() {}
+};

wled00/const.h

@@ -200,6 +200,7 @@
 #define USERMOD_ID_INA226                50     //Usermod "usermod_ina226.h"
 #define USERMOD_ID_AHT10                 51     //Usermod "usermod_aht10.h"
 #define USERMOD_ID_LD2410                52     //Usermod "usermod_ld2410.h"
+#define USERMOD_ID_POV_DISPLAY           53     //Usermod "usermod_pov_display.h"
 
 //Access point behavior
 #define AP_BEHAVIOR_BOOT_NO_CONN          0     //Open AP when no connection after boot

wled00/usermods_list.cpp

@@ -210,6 +210,10 @@
   #include "../usermods/LDR_Dusk_Dawn_v2/usermod_LDR_Dusk_Dawn_v2.h"
 #endif
 
+#ifdef USERMOD_POV_DISPLAY
+  #include "../usermods/pov_display/usermod_pov_display.h"
+#endif
+
 #ifdef USERMOD_STAIRCASE_WIPE
   #include "../usermods/stairway_wipe_basic/stairway-wipe-usermod-v2.h"
 #endif
@@ -454,4 +458,8 @@ void registerUsermods()
   #ifdef USERMOD_LD2410
   usermods.add(new LD2410Usermod());
   #endif
+
+  #ifdef USERMOD_POV_DISPLAY
+  usermods.add(new PovDisplayUsermod());
+  #endif
 }