ESP32-HUB75-MatrixPanel-DMA/examples/AnimatedGIFPanel/AnimatedGIFPanel.ino
2020-08-10 21:47:13 +01:00

240 lines
6.2 KiB
C++

// Example sketch which shows how to display a 64x32
// animated GIF image stored in FLASH memory
// on a 64x32 LED matrix
//
// To display a GIF from memory, a single callback function
// must be provided - GIFDRAW
// This function is called after each scan line is decoded
// and is passed the 8-bit pixels, RGB565 palette and info
// about how and where to display the line. The palette entries
// can be in little-endian or big-endian order; this is specified
// in the begin() method.
//
// The AnimatedGIF class doesn't allocate or free any memory, but the
// instance data occupies about 22.5K of RAM.
//
// Credits: https://github.com/bitbank2/AnimatedGIF/tree/master/examples/ESP32_LEDMatrix_I2S
//
#define FILESYSTEM SPIFFS
#include <SPIFFS.h>
#include <AnimatedGIF.h>
#include <ESP32-RGB64x32MatrixPanel-I2S-DMA.h>
// ----------------------------
RGB64x32MatrixPanel_I2S_DMA dma_display;
AnimatedGIF gif;
File f;
int x_offset, y_offset;
// Draw a line of image directly on the LED Matrix
void GIFDraw(GIFDRAW *pDraw)
{
uint8_t *s;
uint16_t *d, *usPalette, usTemp[320];
int x, y, iWidth;
iWidth = pDraw->iWidth;
if (iWidth > MATRIX_WIDTH)
iWidth = MATRIX_WIDTH;
usPalette = pDraw->pPalette;
y = pDraw->iY + pDraw->y; // current line
s = pDraw->pPixels;
if (pDraw->ucDisposalMethod == 2) // restore to background color
{
for (x=0; x<iWidth; x++)
{
if (s[x] == pDraw->ucTransparent)
s[x] = pDraw->ucBackground;
}
pDraw->ucHasTransparency = 0;
}
// Apply the new pixels to the main image
if (pDraw->ucHasTransparency) // if transparency used
{
uint8_t *pEnd, c, ucTransparent = pDraw->ucTransparent;
int x, iCount;
pEnd = s + pDraw->iWidth;
x = 0;
iCount = 0; // count non-transparent pixels
while(x < pDraw->iWidth)
{
c = ucTransparent-1;
d = usTemp;
while (c != ucTransparent && s < pEnd)
{
c = *s++;
if (c == ucTransparent) // done, stop
{
s--; // back up to treat it like transparent
}
else // opaque
{
*d++ = usPalette[c];
iCount++;
}
} // while looking for opaque pixels
if (iCount) // any opaque pixels?
{
for(int xOffset = 0; xOffset < iCount; xOffset++ ){
dma_display.drawPixelRGB565(x + xOffset, y, usTemp[xOffset]);
}
x += iCount;
iCount = 0;
}
// no, look for a run of transparent pixels
c = ucTransparent;
while (c == ucTransparent && s < pEnd)
{
c = *s++;
if (c == ucTransparent)
iCount++;
else
s--;
}
if (iCount)
{
x += iCount; // skip these
iCount = 0;
}
}
}
else // does not have transparency
{
s = pDraw->pPixels;
// Translate the 8-bit pixels through the RGB565 palette (already byte reversed)
for (x=0; x<pDraw->iWidth; x++)
{
dma_display.drawPixelRGB565(x, y, usPalette[*s++]);
}
}
} /* GIFDraw() */
void * GIFOpenFile(char *fname, int32_t *pSize)
{
f = FILESYSTEM.open(fname);
if (f)
{
*pSize = f.size();
return (void *)&f;
}
return NULL;
} /* GIFOpenFile() */
void GIFCloseFile(void *pHandle)
{
File *f = static_cast<File *>(pHandle);
if (f != NULL)
f->close();
} /* GIFCloseFile() */
int32_t GIFReadFile(GIFFILE *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;
} /* GIFReadFile() */
int32_t GIFSeekFile(GIFFILE *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;
// Serial.printf("Seek time = %d us\n", i);
return pFile->iPos;
} /* GIFSeekFile() */
unsigned long start_tick = 0;
void ShowGIF(char *name)
{
start_tick = millis();
if (gif.open(name, GIFOpenFile, GIFCloseFile, GIFReadFile, GIFSeekFile, GIFDraw))
{
x_offset = (MATRIX_WIDTH - gif.getCanvasWidth())/2;
if (x_offset < 0) x_offset = 0;
y_offset = (MATRIX_HEIGHT - gif.getCanvasHeight())/2;
if (y_offset < 0) y_offset = 0;
Serial.printf("Successfully opened GIF; Canvas size = %d x %d\n", gif.getCanvasWidth(), gif.getCanvasHeight());
Serial.flush();
while (gif.playFrame(true, NULL))
{
if ( (millis() - start_tick) > 8000) { // we'll get bored after about 8 seconds of the same looping gif
break;
}
}
gif.close();
}
} /* ShowGIF() */
/************************* Arduino Sketch Setup and Loop() *******************************/
void setup() {
Serial.begin(115200);
Serial.println("Starting AnimatedGIFs Sketch");
// Start filesystem
Serial.println(" * Loading SPIFFS");
if(!SPIFFS.begin()){
Serial.println("SPIFFS Mount Failed");
}
dma_display.setPanelBrightness(32);
dma_display.setMinRefreshRate(200);
dma_display.begin();
dma_display.fillScreen(dma_display.color565(0, 0, 0));
gif.begin(LITTLE_ENDIAN_PIXELS);
}
void loop() {
char *szDir = "/gifs"; // play all GIFs in this directory on the SD card
char fname[256];
File root, temp;
while (1) // run forever
{
root = FILESYSTEM.open(szDir);
if (root)
{
temp = root.openNextFile();
while (temp)
{
if (!temp.isDirectory()) // play it
{
strcpy(fname, temp.name());
Serial.printf("Playing %s\n", temp.name());
Serial.flush();
ShowGIF((char *)temp.name());
}
temp.close();
temp = root.openNextFile();
}
root.close();
} // root
delay(4000); // pause before restarting
} // while
}