104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
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#include "GifDecoder.h"
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#include "wled.h"
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File file;
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char lastFilename[34] = "/";
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GifDecoder<64, 64, 12, true> decoder;
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bool gifDecodeFailed = false;
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long lastFrameDisplayTime = 0, currentFrameDelay = 0;
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bool fileSeekCallback(unsigned long position) {
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return file.seek(position);
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}
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unsigned long filePositionCallback(void) {
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return file.position();
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}
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int fileReadCallback(void) {
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return file.read();
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}
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int fileReadBlockCallback(void * buffer, int numberOfBytes) {
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return file.read((uint8_t*)buffer, numberOfBytes);
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}
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int fileSizeCallback(void) {
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return file.size();
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}
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bool openGif(const char *filename) {
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file = WLED_FS.open(filename, "r");
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if (!file) return false;
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return true;
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}
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Segment* activeSeg;
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uint16_t gifWidth, gifHeight;
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uint16_t fillPixX, fillPixY;
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void screenClearCallback(void) {
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activeSeg->fill(0);
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}
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void updateScreenCallback(void) {}
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void drawPixelCallback(int16_t x, int16_t y, uint8_t red, uint8_t green, uint8_t blue) {
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// simple nearest-neighbor scaling
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int16_t outY = y * activeSeg->height() / gifHeight;
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int16_t outX = x * activeSeg->width() / gifWidth;
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// set multiple pixels if upscaling
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for (int16_t i = 0; i < (activeSeg->width()+(gifWidth-1)) / gifWidth; i++) {
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for (int16_t j = 0; j < (activeSeg->height()+(gifHeight-1)) / gifHeight; j++) {
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activeSeg->setPixelColorXY(outX + i, outY + j, red, green, blue);
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}
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}
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}
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// renders an image (.gif only; .bmp and .fseq to be added soon) from FS to a segment
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bool renderImageToSegment(Segment &seg) {
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if (!seg.name) return false;
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activeSeg = &seg;
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if (strncmp(lastFilename +1, seg.name, 32) != 0) {
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Serial.println("segname changed");
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strncpy(lastFilename +1, seg.name, 32);
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gifDecodeFailed = false;
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if (strcmp(lastFilename + strlen(lastFilename) - 4, ".gif") != 0) {
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//DEBUG_PRINTLN(F("Image file not found or not a .gif"));
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gifDecodeFailed = true;
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return false;
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}
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if (file) file.close();
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Serial.print("opening gif: ");
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Serial.println(openGif(lastFilename));
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if (!file) { gifDecodeFailed = true; return false; }
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decoder.setScreenClearCallback(screenClearCallback);
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decoder.setUpdateScreenCallback(updateScreenCallback);
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decoder.setDrawPixelCallback(drawPixelCallback);
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decoder.setFileSeekCallback(fileSeekCallback);
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decoder.setFilePositionCallback(filePositionCallback);
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decoder.setFileReadCallback(fileReadCallback);
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decoder.setFileReadBlockCallback(fileReadBlockCallback);
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decoder.setFileSizeCallback(fileSizeCallback);
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Serial.println("Starting decoding");
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if(decoder.startDecoding() < 0) { gifDecodeFailed = true; return false; }
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Serial.println("Decoding started");
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}
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if (gifDecodeFailed) return false;
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if (!file) { gifDecodeFailed = true; return false; }
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if((millis() - lastFrameDisplayTime) > currentFrameDelay) {
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decoder.getSize(&gifWidth, &gifHeight);
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fillPixX = (seg.width()+(gifWidth-1)) / gifWidth;
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fillPixY = (seg.height()+(gifHeight-1)) / gifHeight;
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Serial.println("decoding frame");
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int result = decoder.decodeFrame(false);
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if (result < 0) { gifDecodeFailed = true; return false; }
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currentFrameDelay = decoder.getFrameDelay_ms();
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lastFrameDisplayTime = millis();
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}
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return true;
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}
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