229 lines
7.7 KiB
C++
229 lines
7.7 KiB
C++
/**The MIT License (MIT)
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Copyright (c) 2015 by Daniel Eichhorn
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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See more at http://blog.squix.ch
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*/
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#include "GfxUi.h"
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GfxUi::GfxUi(Adafruit_ILI9341 *tft) {
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_tft = tft;
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}
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void GfxUi::drawString(int x, int y, char *text) {
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int16_t x1, y1;
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uint16_t w, h;
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_tft->setTextWrap(false);
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_tft->getTextBounds(text, 0, 0, &x1, &y1, &w, &h);
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switch (_alignment) {
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case LEFT:
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x1 = x;
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break;
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case CENTER:
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x1 = x - w / 2;
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break;
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case RIGHT:
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x1 = x - w;
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break;
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}
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if (_textColor != _backgroundColor) {
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_tft->fillRect(x1, y - h -1, w + 1, h + 1, _backgroundColor);
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}
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_tft->setCursor(x1, y);
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_tft->print(text);
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}
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void GfxUi::drawString(int x, int y, String text) {
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char buf[text.length()+2];
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text.toCharArray(buf, text.length() + 1);
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drawString(x, y, buf);
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}
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void GfxUi::setTextColor(uint16_t c) {
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setTextColor(c, c);
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}
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void GfxUi::setTextColor(uint16_t c, uint16_t bg) {
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_textColor = c;
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_backgroundColor = bg;
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_tft->setTextColor(_textColor, _backgroundColor);
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}
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void GfxUi::setTextAlignment(TextAlignment alignment) {
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_alignment = alignment;
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}
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void GfxUi::drawProgressBar(uint16_t x0, uint16_t y0, uint16_t w, uint16_t h, uint8_t percentage, uint16_t frameColor, uint16_t barColor) {
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if (percentage == 0) {
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_tft->fillRoundRect(x0, y0, w, h, 3, _backgroundColor);
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}
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uint8_t margin = 2;
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uint16_t barHeight = h - 2 * margin;
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uint16_t barWidth = w - 2 * margin;
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_tft->drawRoundRect(x0, y0, w, h, 3, frameColor);
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_tft->fillRect(x0 + margin, y0 + margin, barWidth * percentage / 100.0, barHeight, barColor);
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}
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// Code mostly from
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// https://github.com/adafruit/Adafruit_ILI9341/blob/master/examples/spitftbitmap/spitftbitmap.ino
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void GfxUi::drawBmp(String filename, uint8_t x, uint16_t y) {
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File bmpFile;
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int bmpWidth, bmpHeight; // W+H in pixels
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uint8_t bmpDepth; // Bit depth (currently must be 24)
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uint32_t bmpImageoffset; // Start of image data in file
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uint32_t rowSize; // Not always = bmpWidth; may have padding
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uint8_t sdbuffer[3*BUFFPIXEL]; // pixel buffer (R+G+B per pixel)
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uint8_t buffidx = sizeof(sdbuffer); // Current position in sdbuffer
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boolean goodBmp = false; // Set to true on valid header parse
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boolean flip = true; // BMP is stored bottom-to-top
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int w, h, row, col;
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uint8_t r, g, b;
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uint32_t pos = 0, startTime = millis();
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if((x >= _tft->width()) || (y >= _tft->height())) return;
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Serial.println();
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Serial.print(F("Loading image '"));
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Serial.print(filename);
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Serial.println('\'');
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// Open requested file on SD card
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if ((bmpFile = SPIFFS.open(filename, "r")) == NULL) {
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Serial.print(F("File not found"));
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return;
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}
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// Parse BMP header
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if(read16(bmpFile) == 0x4D42) { // BMP signature
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Serial.print(F("File size: ")); Serial.println(read32(bmpFile));
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(void)read32(bmpFile); // Read & ignore creator bytes
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bmpImageoffset = read32(bmpFile); // Start of image data
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Serial.print(F("Image Offset: ")); Serial.println(bmpImageoffset, DEC);
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// Read DIB header
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Serial.print(F("Header size: ")); Serial.println(read32(bmpFile));
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bmpWidth = read32(bmpFile);
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bmpHeight = read32(bmpFile);
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if(read16(bmpFile) == 1) { // # planes -- must be '1'
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bmpDepth = read16(bmpFile); // bits per pixel
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Serial.print(F("Bit Depth: ")); Serial.println(bmpDepth);
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if((bmpDepth == 24) && (read32(bmpFile) == 0)) { // 0 = uncompressed
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goodBmp = true; // Supported BMP format -- proceed!
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Serial.print(F("Image size: "));
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Serial.print(bmpWidth);
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Serial.print('x');
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Serial.println(bmpHeight);
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// BMP rows are padded (if needed) to 4-byte boundary
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rowSize = (bmpWidth * 3 + 3) & ~3;
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// If bmpHeight is negative, image is in top-down order.
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// This is not canon but has been observed in the wild.
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if(bmpHeight < 0) {
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bmpHeight = -bmpHeight;
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flip = false;
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}
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// Crop area to be loaded
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w = bmpWidth;
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h = bmpHeight;
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if((x+w-1) >= _tft->width()) w = _tft->width() - x;
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if((y+h-1) >= _tft->height()) h = _tft->height() - y;
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// Open write access to the tft
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_tft->startWrite();
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for (row=0; row<h; row++) { // For each scanline...
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// Seek to start of scan line. It might seem labor-
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// intensive to be doing this on every line, but this
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// method covers a lot of gritty details like cropping
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// and scanline padding. Also, the seek only takes
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// place if the file position actually needs to change
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// (avoids a lot of cluster math in SD library).
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if(flip) // Bitmap is stored bottom-to-top order (normal BMP)
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pos = bmpImageoffset + (bmpHeight - 1 - row) * rowSize;
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else // Bitmap is stored top-to-bottom
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pos = bmpImageoffset + row * rowSize;
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if(bmpFile.position() != pos) { // Need seek?
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bmpFile.seek(pos, SeekSet);
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buffidx = sizeof(sdbuffer); // Force buffer reload
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}
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for (col=0; col<w; col++) { // For each pixel...
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// Time to read more pixel data?
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if (buffidx >= sizeof(sdbuffer)) { // Indeed
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bmpFile.read(sdbuffer, sizeof(sdbuffer));
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buffidx = 0; // Set index to beginning
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}
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// Convert pixel from BMP to TFT format, push to display
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b = sdbuffer[buffidx++];
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g = sdbuffer[buffidx++];
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r = sdbuffer[buffidx++];
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_tft->writePixel(x+col,y+row,_tft->color565(r,g,b));
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yield();
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} // end pixel
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} // end scanline
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_tft->endWrite();
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Serial.print(F("Loaded in "));
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Serial.print(millis() - startTime);
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Serial.println(" ms");
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} // end goodBmp
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}
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}
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bmpFile.close();
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if(!goodBmp) Serial.println(F("BMP format not recognized."));
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}
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// These read 16- and 32-bit types from the SD card file.
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// BMP data is stored little-endian, Arduino is little-endian too.
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// May need to reverse subscript order if porting elsewhere.
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uint16_t GfxUi::read16(File &f) {
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uint16_t result;
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((uint8_t *)&result)[0] = f.read(); // LSB
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((uint8_t *)&result)[1] = f.read(); // MSB
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return result;
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}
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uint32_t GfxUi::read32(File &f) {
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uint32_t result;
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((uint8_t *)&result)[0] = f.read(); // LSB
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((uint8_t *)&result)[1] = f.read();
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((uint8_t *)&result)[2] = f.read();
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((uint8_t *)&result)[3] = f.read(); // MSB
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return result;
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}
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void GfxUi::copyProgmemToFile(const uint8_t *data, unsigned int image_len, String filename) {
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File f = SPIFFS.open(filename, "w+");
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for (int i = 0; i < image_len; i++) {
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uint8_t c = pgm_read_byte(data++);
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f.write(c);
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}
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f.close();
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}
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