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336 lines
8.7 KiB
C++
336 lines
8.7 KiB
C++
#include <Arduino.h>
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#include <SPIFFS.h>
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//#include <TJpg_Decoder.h>
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#include <JPEGDecoder.h> // JPEG decoder library
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#include "imageJPEG.h"
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#include "display.h"
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#define DEBUG = 1
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File tmpFileBuffer;
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bool tft_output(int16_t x, int16_t y, uint16_t w, uint16_t h, uint16_t *bitmap);
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static constexpr int MAX_WIDTH = 640;
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static constexpr uint8_t BLOCK_SIZE = 15;
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static uint8_t blockDelta[BLOCK_SIZE * MAX_WIDTH + 1];
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static int16_t curRowDeltaJ[MAX_WIDTH + 1];
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unsigned int pixelCount = 0;
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#define minimum(a, b) (((a) < (b)) ? (a) : (b))
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void setupImageJPEG()
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{
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Serial.println("setupJPEG");
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// The jpeg image can be scaled by a factor of 1, 2, 4, or 8
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//TJpgDec.setJpgScale(1);
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// The decoder must be given the exact name of the rendering function above
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//TJpgDec.setCallback(tft_output);
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//memset(blockDelta, 0, sizeof(blockDelta));
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}
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void jpegOpenFramebuffer()
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{
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displayOpen();
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SPIFFS.remove("/tmp.jpeg");
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tmpFileBuffer = SPIFFS.open("/tmp.jpeg", FILE_WRITE);
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if (!tmpFileBuffer)
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{
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Serial.println("Failed to open file for writing");
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}
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pixelCount = 0;
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}
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void jpegWriteFramebuffer(int offset, uint8_t bitmap[], int c)
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{
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Serial.print(".");
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if (tmpFileBuffer)
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{
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tmpFileBuffer.write(bitmap, c);
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}
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}
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//====================================================================================
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// Print information about the image
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//====================================================================================
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void jpegInfo()
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{
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Serial.println(F("==============="));
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Serial.println(F("JPEG image info"));
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Serial.println(F("==============="));
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Serial.print(F("Width :"));
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Serial.println(JpegDec.width);
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Serial.print(F("Height :"));
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Serial.println(JpegDec.height);
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Serial.print(F("Components :"));
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Serial.println(JpegDec.comps);
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Serial.print(F("MCU / row :"));
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Serial.println(JpegDec.MCUSPerRow);
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Serial.print(F("MCU / col :"));
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Serial.println(JpegDec.MCUSPerCol);
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Serial.print(F("Scan type :"));
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Serial.println(JpegDec.scanType);
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Serial.print(F("MCU width :"));
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Serial.println(JpegDec.MCUWidth);
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Serial.print(F("MCU height :"));
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Serial.println(JpegDec.MCUHeight);
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Serial.println(F("==============="));
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}
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//====================================================================================
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// Decode and paint onto the TFT screen
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//====================================================================================
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void renderJPEG(int xpos, int ypos)
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{
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// retrieve infomration about the image
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uint16_t *pImg;
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uint16_t mcu_w = JpegDec.MCUWidth;
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uint16_t mcu_h = JpegDec.MCUHeight;
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uint32_t max_x = JpegDec.width;
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uint32_t max_y = JpegDec.height;
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// Jpeg images are draw as a set of image block (tiles) called Minimum Coding Units (MCUs)
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// Typically these MCUs are 16x16 pixel blocks
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// Determine the width and height of the right and bottom edge image blocks
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uint32_t min_w = minimum(mcu_w, max_x % mcu_w);
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uint32_t min_h = minimum(mcu_h, max_y % mcu_h);
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// save the current image block size
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uint32_t win_w = mcu_w;
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uint32_t win_h = mcu_h;
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// record the current time so we can measure how long it takes to draw an image
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uint32_t drawTime = millis();
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// save the coordinate of the right and bottom edges to assist image cropping
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// to the screen size
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max_x += xpos;
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max_y += ypos;
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// read each MCU block until there are no more
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while (JpegDec.read())
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{
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// save a pointer to the image block
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pImg = JpegDec.pImage;
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// calculate where the image block should be drawn on the screen
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int mcu_x = JpegDec.MCUx * mcu_w + xpos;
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int mcu_y = JpegDec.MCUy * mcu_h + ypos;
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// check if the image block size needs to be changed for the right and bottom edges
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if (mcu_x + mcu_w <= max_x)
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win_w = mcu_w;
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else
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win_w = min_w;
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if (mcu_y + mcu_h <= max_y)
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win_h = mcu_h;
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else
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win_h = min_h;
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// calculate how many pixels must be drawn
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uint32_t mcu_pixels = win_w * win_h;
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// draw image block if it will fit on the screen
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if ((mcu_x + win_w) <= display.width() && (mcu_y + win_h) <= display.height())
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{
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// TODO
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//display.drawRGBBitmap(mcu_x, mcu_y, pImg, win_w, win_h);
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tft_output(mcu_x, mcu_y, win_w, win_h, pImg);
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/*
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// open a window onto the screen to paint the pixels into
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//TFTscreen.setAddrWindow(mcu_x, mcu_y, mcu_x + win_w - 1, mcu_y + win_h - 1);
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TFTscreen.setAddrWindow(mcu_x, mcu_y, mcu_x + win_w - 1, mcu_y + win_h - 1);
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// push all the image block pixels to the screen
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while (mcu_pixels--)
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TFTscreen.pushColor(*pImg++); // Send to TFT 16 bits at a time
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*/
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}
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// stop drawing blocks if the bottom of the screen has been reached
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// the abort function will close the file
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else if ((mcu_y + win_h) >= display.height())
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{
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JpegDec.abort();
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}
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}
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// calculate how long it took to draw the image
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drawTime = millis() - drawTime; // Calculate the time it took
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// print the results to the serial port
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Serial.print("Total render time was : ");
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Serial.print(drawTime);
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Serial.println(" ms");
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Serial.println("=====================================");
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}
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void jpegFlushFramebuffer()
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{
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if (tmpFileBuffer)
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{
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tmpFileBuffer.close();
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if (!SPIFFS.exists("/tmp.jpeg"))
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{
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Serial.println("=== /tmp.jpeg missing");
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}
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// initialise the decoder to give access to image information
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int ret = JpegDec.decodeFile("/tmp.jpeg");
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Serial.print("decodeFile ret = ");
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Serial.println(ret);
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// print information about the image to the serial port
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jpegInfo();
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// render the image onto the screen at coordinate 0,0
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renderJPEG(0, 0);
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/*
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uint16_t w = 0, h = 0;
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TJpgDec.getFsJpgSize(&w, &h, "/tmp.jpeg");
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Serial.print("Image size: ");
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Serial.print(w);
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Serial.print("x");
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Serial.println(h);
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TJpgDec.drawFsJpg(0, 0, "/tmp.jpeg");
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*/
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}
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}
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void on_drawPixel(uint32_t x, uint32_t y, uint32_t color)
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{
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pixelCount++;
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uint32_t blockPageY = y - ((y / 16) * 16);
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blockDelta[(blockPageY * MAX_WIDTH) + x] = color;
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// TODO bessere lösung finden !
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if (pixelCount == 10240)
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{
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// new block
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uint32_t originOffsetY = ((y / 16) * 16);
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//Serial.println("new block");
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for (uint16_t _y = 0; _y <= BLOCK_SIZE; _y++)
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{
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for (uint16_t _x = 0; _x < MAX_WIDTH; _x++)
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{
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uint32_t originX = _x;
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uint32_t originY = originOffsetY + _y + (blockPageY * 16);
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uint8_t originColor = blockDelta[(_y * MAX_WIDTH) + _x];
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uint8_t blue = originColor & 0x001F; // 5 bits blue
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uint8_t green = originColor & 0x07E0; // 6 bits green
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uint8_t red = originColor & 0xF800; // 5 bits red
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if (false && originX <= 70)
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{
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//uint8_t r = ((((originColor >> 11) & 0x1F) * 527) + 23) >> 6;
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//uint8_t g = ((((originColor >> 5) & 0x3F) * 259) + 33) >> 6;
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//uint8_t b = (((originColor & 0x1F) * 527) + 23) >> 6;
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uint8_t r = red;
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uint8_t g = green;
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uint8_t b = blue;
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Serial.print("Pixel @ y: ");
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Serial.print(y);
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Serial.print(" x: ");
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Serial.print(x);
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Serial.print(" Color, R:");
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Serial.print(r);
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Serial.print(", G:");
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Serial.print(g);
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Serial.print(", B:");
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Serial.println(b);
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}
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uint8_t rgba[4] = {red, green, blue, 0};
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ImageProcessPixel(originX, originY, rgba);
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}
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}
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// clean buffer
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memset(blockDelta, 0, sizeof(blockDelta));
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pixelCount = 0;
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}
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}
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// This next function will be called during decoding of the jpeg file to
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// render each block to the TFT. If you use a different TFT library
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// you will need to adapt this function to suit.
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bool tft_output(int16_t x, int16_t y, uint16_t w, uint16_t h, uint16_t *bitmap)
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{
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if (false && y == 0)
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{
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//tft_output: x = 0 y = 0 w = 16 h = 16
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//tft_output: x = 16 y = 0 w = 16 h = 16
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//tft_output: x = 384 y = 0 w = 6 h = 16
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//tft_output: x = 0 y = 16 w = 16 h = 16
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Serial.print("tft_output: x = ");
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Serial.print(x);
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Serial.print(" y = ");
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Serial.print(y);
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Serial.print(" w = ");
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Serial.print(w);
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Serial.print(" h = ");
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Serial.println(h);
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}
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// Stop further decoding as image is running off bottom of screen
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if (y >= display.height())
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{
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Serial.println("y is out of display range!");
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return 0;
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}
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int16_t _y = y;
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for (int16_t j = 0; j < h; j++, _y++)
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{
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for (int16_t i = 0; i < w; i++)
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{
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// debug
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if (_y == 10 && x + i >= 200 && x + i <= 250)
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{
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uint32_t originColor = bitmap[j * w + i];
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uint8_t b = originColor & 0x001F; // 5 bits blue
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uint8_t g = originColor & 0x07E0; // 6 bits green
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uint8_t r = originColor & 0xF800; // 5 bits red
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Serial.print("Pixel @ y: ");
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Serial.print(_y);
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Serial.print(" x: ");
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Serial.print(x + i);
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Serial.print(" Color, R:");
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Serial.print(r);
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Serial.print(", G:");
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Serial.print(g);
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Serial.print(", B:");
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Serial.println(b);
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}
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on_drawPixel(x + i, _y, bitmap[j * w + i]);
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}
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}
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if (false && y == 0)
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{
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Serial.println(pixelCount);
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}
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// Return 1 to decode next block
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return 1;
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} |