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732 lines
29 KiB
C++
732 lines
29 KiB
C++
/*
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FX_2Dfcn.cpp contains all 2D utility functions
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Copyright (c) 2022 Blaz Kristan (https://blaz.at/home)
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Licensed under the EUPL v. 1.2 or later
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Adapted from code originally licensed under the MIT license
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Parts of the code adapted from WLED Sound Reactive
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*/
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#include "wled.h"
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#include "FX.h"
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#include "palettes.h"
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// setUpMatrix() - constructs ledmap array from matrix of panels with WxH pixels
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// this converts physical (possibly irregular) LED arrangement into well defined
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// array of logical pixels: fist entry corresponds to left-topmost logical pixel
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// followed by horizontal pixels, when Segment::maxWidth logical pixels are added they
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// are followed by next row (down) of Segment::maxWidth pixels (and so forth)
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// note: matrix may be comprised of multiple panels each with different orientation
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// but ledmap takes care of that. ledmap is constructed upon initialization
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// so matrix should disable regular ledmap processing
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void WS2812FX::setUpMatrix() {
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#ifndef WLED_DISABLE_2D
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// isMatrix is set in cfg.cpp or set.cpp
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if (isMatrix) {
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// calculate width dynamically because it may have gaps
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Segment::maxWidth = 1;
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Segment::maxHeight = 1;
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for (size_t i = 0; i < panel.size(); i++) {
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Panel &p = panel[i];
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if (p.xOffset + p.width > Segment::maxWidth) {
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Segment::maxWidth = p.xOffset + p.width;
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}
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if (p.yOffset + p.height > Segment::maxHeight) {
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Segment::maxHeight = p.yOffset + p.height;
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}
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}
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// safety check
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if (Segment::maxWidth * Segment::maxHeight > MAX_LEDS || Segment::maxWidth <= 1 || Segment::maxHeight <= 1) {
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DEBUG_PRINTLN(F("2D Bounds error."));
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isMatrix = false;
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Segment::maxWidth = _length;
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Segment::maxHeight = 1;
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panels = 0;
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panel.clear(); // release memory allocated by panels
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resetSegments();
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return;
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}
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customMappingSize = 0; // prevent use of mapping if anything goes wrong
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if (customMappingTable) free(customMappingTable);
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customMappingTable = static_cast<uint16_t*>(malloc(sizeof(uint16_t)*getLengthTotal()));
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if (customMappingTable) {
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customMappingSize = getLengthTotal();
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// fill with empty in case we don't fill the entire matrix
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unsigned matrixSize = Segment::maxWidth * Segment::maxHeight;
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for (unsigned i = 0; i<matrixSize; i++) customMappingTable[i] = 0xFFFFU;
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for (unsigned i = matrixSize; i<getLengthTotal(); i++) customMappingTable[i] = i; // trailing LEDs for ledmap (after matrix) if it exist
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// we will try to load a "gap" array (a JSON file)
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// the array has to have the same amount of values as mapping array (or larger)
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// "gap" array is used while building ledmap (mapping array)
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// and discarded afterwards as it has no meaning after the process
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// content of the file is just raw JSON array in the form of [val1,val2,val3,...]
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// there are no other "key":"value" pairs in it
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// allowed values are: -1 (missing pixel/no LED attached), 0 (inactive/unused pixel), 1 (active/used pixel)
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char fileName[32]; strcpy_P(fileName, PSTR("/2d-gaps.json"));
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bool isFile = WLED_FS.exists(fileName);
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size_t gapSize = 0;
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int8_t *gapTable = nullptr;
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if (isFile && requestJSONBufferLock(20)) {
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DEBUG_PRINT(F("Reading LED gap from "));
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DEBUG_PRINTLN(fileName);
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// read the array into global JSON buffer
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if (readObjectFromFile(fileName, nullptr, pDoc)) {
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// the array is similar to ledmap, except it has only 3 values:
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// -1 ... missing pixel (do not increase pixel count)
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// 0 ... inactive pixel (it does count, but should be mapped out (-1))
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// 1 ... active pixel (it will count and will be mapped)
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JsonArray map = pDoc->as<JsonArray>();
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gapSize = map.size();
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if (!map.isNull() && gapSize >= matrixSize) { // not an empty map
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gapTable = static_cast<int8_t*>(malloc(gapSize));
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if (gapTable) for (size_t i = 0; i < gapSize; i++) {
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gapTable[i] = constrain(map[i], -1, 1);
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}
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}
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}
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DEBUG_PRINTLN(F("Gaps loaded."));
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releaseJSONBufferLock();
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}
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unsigned x, y, pix=0; //pixel
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for (size_t pan = 0; pan < panel.size(); pan++) {
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Panel &p = panel[pan];
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unsigned h = p.vertical ? p.height : p.width;
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unsigned v = p.vertical ? p.width : p.height;
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for (size_t j = 0; j < v; j++){
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for(size_t i = 0; i < h; i++) {
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y = (p.vertical?p.rightStart:p.bottomStart) ? v-j-1 : j;
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x = (p.vertical?p.bottomStart:p.rightStart) ? h-i-1 : i;
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x = p.serpentine && j%2 ? h-x-1 : x;
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size_t index = (p.yOffset + (p.vertical?x:y)) * Segment::maxWidth + p.xOffset + (p.vertical?y:x);
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if (!gapTable || (gapTable && gapTable[index] > 0)) customMappingTable[index] = pix; // a useful pixel (otherwise -1 is retained)
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if (!gapTable || (gapTable && gapTable[index] >= 0)) pix++; // not a missing pixel
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}
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}
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}
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// delete gap array as we no longer need it
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if (gapTable) free(gapTable);
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#ifdef WLED_DEBUG
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DEBUG_PRINT(F("Matrix ledmap:"));
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for (unsigned i=0; i<customMappingSize; i++) {
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if (!(i%Segment::maxWidth)) DEBUG_PRINTLN();
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DEBUG_PRINTF_P(PSTR("%4d,"), customMappingTable[i]);
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}
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DEBUG_PRINTLN();
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#endif
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} else { // memory allocation error
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DEBUG_PRINTLN(F("ERROR 2D LED map allocation error."));
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isMatrix = false;
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panels = 0;
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panel.clear();
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Segment::maxWidth = _length;
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Segment::maxHeight = 1;
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resetSegments();
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}
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}
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#else
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isMatrix = false; // no matter what config says
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#endif
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}
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///////////////////////////////////////////////////////////
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// Segment:: routines
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///////////////////////////////////////////////////////////
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#ifndef WLED_DISABLE_2D
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// raw setColor function without checks (checks are done in setPixelColorXY())
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void IRAM_ATTR_YN Segment::_setPixelColorXY_raw(const int& x, const int& y, uint32_t& col) const
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{
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const int baseX = start + x;
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const int baseY = startY + y;
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#ifndef WLED_DISABLE_MODE_BLEND
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// if blending modes, blend with underlying pixel
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if (_modeBlend && blendingStyle == BLEND_STYLE_FADE) col = color_blend16(strip.getPixelColorXY(baseX, baseY), col, 0xFFFFU - progress());
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#endif
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strip.setPixelColorXY(baseX, baseY, col);
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// Apply mirroring
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if (mirror || mirror_y) {
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const int mirrorX = start + width() - x - 1;
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const int mirrorY = startY + height() - y - 1;
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if (mirror) strip.setPixelColorXY(transpose ? baseX : mirrorX, transpose ? mirrorY : baseY, col);
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if (mirror_y) strip.setPixelColorXY(transpose ? mirrorX : baseX, transpose ? baseY : mirrorY, col);
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if (mirror && mirror_y) strip.setPixelColorXY(mirrorX, mirrorY, col);
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}
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}
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// pixel is clipped if it falls outside clipping range (_modeBlend==true) or is inside clipping range (_modeBlend==false)
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// if clipping start > stop the clipping range is inverted
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// _modeBlend==true -> old effect during transition
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// _modeBlend==false -> new effect during transition
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bool IRAM_ATTR_YN Segment::isPixelXYClipped(int x, int y) const {
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#ifndef WLED_DISABLE_MODE_BLEND
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if (_clipStart != _clipStop && blendingStyle != BLEND_STYLE_FADE) {
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const bool invertX = _clipStart > _clipStop;
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const bool invertY = _clipStartY > _clipStopY;
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const int startX = invertX ? _clipStop : _clipStart;
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const int stopX = invertX ? _clipStart : _clipStop;
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const int startY = invertY ? _clipStopY : _clipStartY;
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const int stopY = invertY ? _clipStartY : _clipStopY;
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if (blendingStyle == BLEND_STYLE_FAIRY_DUST) {
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const unsigned width = stopX - startX; // assumes full segment width (faster than virtualWidth())
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const unsigned len = width * (stopY - startY); // assumes full segment height (faster than virtualHeight())
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if (len < 2) return false;
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const unsigned shuffled = hashInt(x + y * width) % len;
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const unsigned pos = (shuffled * 0xFFFFU) / len;
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return progress() > pos;
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}
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bool xInside = (x >= startX && x < stopX); if (invertX) xInside = !xInside;
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bool yInside = (y >= startY && y < stopY); if (invertY) yInside = !yInside;
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const bool clip = (invertX && invertY) ? !_modeBlend : _modeBlend;
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if (xInside && yInside) return clip; // covers window & corners (inverted)
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return !clip;
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}
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#endif
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return false;
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}
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void IRAM_ATTR_YN Segment::setPixelColorXY(int x, int y, uint32_t col) const
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{
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if (!isActive()) return; // not active
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const int vW = vWidth(); // segment width in logical pixels (can be 0 if segment is inactive)
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const int vH = vHeight(); // segment height in logical pixels (is always >= 1)
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#ifndef WLED_DISABLE_MODE_BLEND
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unsigned prog = 0xFFFF - progress();
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if (!prog && !_modeBlend && (blendingStyle & BLEND_STYLE_PUSH_MASK)) {
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unsigned dX = (blendingStyle == BLEND_STYLE_PUSH_UP || blendingStyle == BLEND_STYLE_PUSH_DOWN) ? 0 : prog * vW / 0xFFFF;
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unsigned dY = (blendingStyle == BLEND_STYLE_PUSH_LEFT || blendingStyle == BLEND_STYLE_PUSH_RIGHT) ? 0 : prog * vH / 0xFFFF;
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if (blendingStyle == BLEND_STYLE_PUSH_LEFT || blendingStyle == BLEND_STYLE_PUSH_TL || blendingStyle == BLEND_STYLE_PUSH_BL) x += dX;
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else x -= dX;
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if (blendingStyle == BLEND_STYLE_PUSH_DOWN || blendingStyle == BLEND_STYLE_PUSH_TL || blendingStyle == BLEND_STYLE_PUSH_TR) y -= dY;
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else y += dY;
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}
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#endif
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if (x >= vW || y >= vH || x < 0 || y < 0 || isPixelXYClipped(x,y)) return; // if pixel would fall out of virtual segment just exit
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// if color is unscaled
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if (!_colorScaled) col = color_fade(col, _segBri);
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if (reverse ) x = vW - x - 1;
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if (reverse_y) y = vH - y - 1;
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if (transpose) { std::swap(x,y); } // swap X & Y if segment transposed
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unsigned groupLen = groupLength();
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if (groupLen > 1) {
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int W = width();
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int H = height();
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x *= groupLen; // expand to physical pixels
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y *= groupLen; // expand to physical pixels
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const int maxY = std::min(y + grouping, H);
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const int maxX = std::min(x + grouping, W);
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for (int yY = y; yY < maxY; yY++) {
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for (int xX = x; xX < maxX; xX++) {
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_setPixelColorXY_raw(xX, yY, col);
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}
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}
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} else {
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_setPixelColorXY_raw(x, y, col);
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}
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}
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#ifdef WLED_USE_AA_PIXELS
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// anti-aliased version of setPixelColorXY()
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void Segment::setPixelColorXY(float x, float y, uint32_t col, bool aa) const
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{
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if (!isActive()) return; // not active
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if (x<0.0f || x>1.0f || y<0.0f || y>1.0f) return; // not normalized
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float fX = x * (vWidth()-1);
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float fY = y * (vHeight()-1);
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if (aa) {
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unsigned xL = roundf(fX-0.49f);
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unsigned xR = roundf(fX+0.49f);
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unsigned yT = roundf(fY-0.49f);
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unsigned yB = roundf(fY+0.49f);
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float dL = (fX - xL)*(fX - xL);
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float dR = (xR - fX)*(xR - fX);
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float dT = (fY - yT)*(fY - yT);
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float dB = (yB - fY)*(yB - fY);
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uint32_t cXLYT = getPixelColorXY(xL, yT);
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uint32_t cXRYT = getPixelColorXY(xR, yT);
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uint32_t cXLYB = getPixelColorXY(xL, yB);
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uint32_t cXRYB = getPixelColorXY(xR, yB);
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if (xL!=xR && yT!=yB) {
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setPixelColorXY(xL, yT, color_blend(col, cXLYT, uint8_t(sqrtf(dL*dT)*255.0f))); // blend TL pixel
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setPixelColorXY(xR, yT, color_blend(col, cXRYT, uint8_t(sqrtf(dR*dT)*255.0f))); // blend TR pixel
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setPixelColorXY(xL, yB, color_blend(col, cXLYB, uint8_t(sqrtf(dL*dB)*255.0f))); // blend BL pixel
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setPixelColorXY(xR, yB, color_blend(col, cXRYB, uint8_t(sqrtf(dR*dB)*255.0f))); // blend BR pixel
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} else if (xR!=xL && yT==yB) {
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setPixelColorXY(xR, yT, color_blend(col, cXLYT, uint8_t(dL*255.0f))); // blend L pixel
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setPixelColorXY(xR, yT, color_blend(col, cXRYT, uint8_t(dR*255.0f))); // blend R pixel
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} else if (xR==xL && yT!=yB) {
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setPixelColorXY(xR, yT, color_blend(col, cXLYT, uint8_t(dT*255.0f))); // blend T pixel
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setPixelColorXY(xL, yB, color_blend(col, cXLYB, uint8_t(dB*255.0f))); // blend B pixel
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} else {
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setPixelColorXY(xL, yT, col); // exact match (x & y land on a pixel)
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}
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} else {
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setPixelColorXY(uint16_t(roundf(fX)), uint16_t(roundf(fY)), col);
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}
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}
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#endif
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// returns RGBW values of pixel
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uint32_t IRAM_ATTR_YN Segment::getPixelColorXY(int x, int y) const {
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if (!isActive()) return 0; // not active
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const int vW = vWidth();
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const int vH = vHeight();
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#ifndef WLED_DISABLE_MODE_BLEND
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unsigned prog = 0xFFFF - progress();
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if (!prog && !_modeBlend && (blendingStyle & BLEND_STYLE_PUSH_MASK)) {
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unsigned dX = (blendingStyle == BLEND_STYLE_PUSH_UP || blendingStyle == BLEND_STYLE_PUSH_DOWN) ? 0 : prog * vW / 0xFFFF;
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unsigned dY = (blendingStyle == BLEND_STYLE_PUSH_LEFT || blendingStyle == BLEND_STYLE_PUSH_RIGHT) ? 0 : prog * vH / 0xFFFF;
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if (blendingStyle == BLEND_STYLE_PUSH_LEFT || blendingStyle == BLEND_STYLE_PUSH_TL || blendingStyle == BLEND_STYLE_PUSH_BL) x -= dX;
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else x += dX;
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if (blendingStyle == BLEND_STYLE_PUSH_DOWN || blendingStyle == BLEND_STYLE_PUSH_TL || blendingStyle == BLEND_STYLE_PUSH_TR) y -= dY;
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else y += dY;
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}
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#endif
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if (x >= vW || y >= vH || x<0 || y<0 || isPixelXYClipped(x,y)) return 0; // if pixel would fall out of virtual segment just exit
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if (reverse ) x = vW - x - 1;
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if (reverse_y) y = vH - y - 1;
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if (transpose) { std::swap(x,y); } // swap X & Y if segment transposed
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x *= groupLength(); // expand to physical pixels
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y *= groupLength(); // expand to physical pixels
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if (x >= width() || y >= height()) return 0;
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return strip.getPixelColorXY(start + x, startY + y);
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}
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// 2D blurring, can be asymmetrical
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void Segment::blur2D(uint8_t blur_x, uint8_t blur_y, bool smear) {
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if (!isActive()) return; // not active
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const unsigned cols = vWidth();
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const unsigned rows = vHeight();
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uint32_t lastnew; // not necessary to initialize lastnew and last, as both will be initialized by the first loop iteration
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uint32_t last;
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if (blur_x) {
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const uint8_t keepx = smear ? 255 : 255 - blur_x;
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const uint8_t seepx = blur_x >> 1;
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for (unsigned row = 0; row < rows; row++) { // blur rows (x direction)
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uint32_t carryover = BLACK;
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uint32_t curnew = BLACK;
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for (unsigned x = 0; x < cols; x++) {
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uint32_t cur = getPixelColorXY(x, row);
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uint32_t part = color_fade(cur, seepx);
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curnew = color_fade(cur, keepx);
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if (x > 0) {
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if (carryover) curnew = color_add(curnew, carryover);
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uint32_t prev = color_add(lastnew, part);
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// optimization: only set pixel if color has changed
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if (last != prev) setPixelColorXY(x - 1, row, prev);
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} else setPixelColorXY(x, row, curnew); // first pixel
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lastnew = curnew;
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last = cur; // save original value for comparison on next iteration
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carryover = part;
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}
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setPixelColorXY(cols-1, row, curnew); // set last pixel
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}
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}
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if (blur_y) {
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const uint8_t keepy = smear ? 255 : 255 - blur_y;
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const uint8_t seepy = blur_y >> 1;
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for (unsigned col = 0; col < cols; col++) {
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uint32_t carryover = BLACK;
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uint32_t curnew = BLACK;
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for (unsigned y = 0; y < rows; y++) {
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uint32_t cur = getPixelColorXY(col, y);
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uint32_t part = color_fade(cur, seepy);
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curnew = color_fade(cur, keepy);
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if (y > 0) {
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if (carryover) curnew = color_add(curnew, carryover);
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uint32_t prev = color_add(lastnew, part);
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// optimization: only set pixel if color has changed
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if (last != prev) setPixelColorXY(col, y - 1, prev);
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} else setPixelColorXY(col, y, curnew); // first pixel
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lastnew = curnew;
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last = cur; //save original value for comparison on next iteration
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carryover = part;
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}
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setPixelColorXY(col, rows - 1, curnew);
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}
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}
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}
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/*
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// 2D Box blur
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void Segment::box_blur(unsigned radius, bool smear) {
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if (!isActive() || radius == 0) return; // not active
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if (radius > 3) radius = 3;
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const unsigned d = (1 + 2*radius) * (1 + 2*radius); // averaging divisor
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const unsigned cols = vWidth();
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const unsigned rows = vHeight();
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uint16_t *tmpRSum = new uint16_t[cols*rows];
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uint16_t *tmpGSum = new uint16_t[cols*rows];
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uint16_t *tmpBSum = new uint16_t[cols*rows];
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uint16_t *tmpWSum = new uint16_t[cols*rows];
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// fill summed-area table (https://en.wikipedia.org/wiki/Summed-area_table)
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for (unsigned x = 0; x < cols; x++) {
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unsigned rS, gS, bS, wS;
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unsigned index;
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rS = gS = bS = wS = 0;
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for (unsigned y = 0; y < rows; y++) {
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index = x * cols + y;
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if (x > 0) {
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unsigned index2 = (x - 1) * cols + y;
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tmpRSum[index] = tmpRSum[index2];
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tmpGSum[index] = tmpGSum[index2];
|
||
tmpBSum[index] = tmpBSum[index2];
|
||
tmpWSum[index] = tmpWSum[index2];
|
||
} else {
|
||
tmpRSum[index] = 0;
|
||
tmpGSum[index] = 0;
|
||
tmpBSum[index] = 0;
|
||
tmpWSum[index] = 0;
|
||
}
|
||
uint32_t c = getPixelColorXY(x, y);
|
||
rS += R(c);
|
||
gS += G(c);
|
||
bS += B(c);
|
||
wS += W(c);
|
||
tmpRSum[index] += rS;
|
||
tmpGSum[index] += gS;
|
||
tmpBSum[index] += bS;
|
||
tmpWSum[index] += wS;
|
||
}
|
||
}
|
||
// do a box blur using pre-calculated sums
|
||
for (unsigned x = 0; x < cols; x++) {
|
||
for (unsigned y = 0; y < rows; y++) {
|
||
// sum = D + A - B - C where k = (x,y)
|
||
// +----+-+---- (x)
|
||
// | | |
|
||
// +----A-B
|
||
// | |k|
|
||
// +----C-D
|
||
// |
|
||
//(y)
|
||
unsigned x0 = x < radius ? 0 : x - radius;
|
||
unsigned y0 = y < radius ? 0 : y - radius;
|
||
unsigned x1 = x >= cols - radius ? cols - 1 : x + radius;
|
||
unsigned y1 = y >= rows - radius ? rows - 1 : y + radius;
|
||
unsigned A = x0 * cols + y0;
|
||
unsigned B = x1 * cols + y0;
|
||
unsigned C = x0 * cols + y1;
|
||
unsigned D = x1 * cols + y1;
|
||
unsigned r = tmpRSum[D] + tmpRSum[A] - tmpRSum[C] - tmpRSum[B];
|
||
unsigned g = tmpGSum[D] + tmpGSum[A] - tmpGSum[C] - tmpGSum[B];
|
||
unsigned b = tmpBSum[D] + tmpBSum[A] - tmpBSum[C] - tmpBSum[B];
|
||
unsigned w = tmpWSum[D] + tmpWSum[A] - tmpWSum[C] - tmpWSum[B];
|
||
setPixelColorXY(x, y, RGBW32(r/d, g/d, b/d, w/d));
|
||
}
|
||
}
|
||
delete[] tmpRSum;
|
||
delete[] tmpGSum;
|
||
delete[] tmpBSum;
|
||
delete[] tmpWSum;
|
||
}
|
||
*/
|
||
void Segment::moveX(int delta, bool wrap) {
|
||
if (!isActive() || !delta) return; // not active
|
||
const int vW = vWidth(); // segment width in logical pixels (can be 0 if segment is inactive)
|
||
const int vH = vHeight(); // segment height in logical pixels (is always >= 1)
|
||
int absDelta = abs(delta);
|
||
if (absDelta >= vW) return;
|
||
uint32_t newPxCol[vW];
|
||
int newDelta;
|
||
int stop = vW;
|
||
int start = 0;
|
||
if (wrap) newDelta = (delta + vW) % vW; // +cols in case delta < 0
|
||
else {
|
||
if (delta < 0) start = absDelta;
|
||
stop = vW - absDelta;
|
||
newDelta = delta > 0 ? delta : 0;
|
||
}
|
||
for (int y = 0; y < vH; y++) {
|
||
for (int x = 0; x < stop; x++) {
|
||
int srcX = x + newDelta;
|
||
if (wrap) srcX %= vW; // Wrap using modulo when `wrap` is true
|
||
newPxCol[x] = getPixelColorXY(srcX, y);
|
||
}
|
||
for (int x = 0; x < stop; x++) setPixelColorXY(x + start, y, newPxCol[x]);
|
||
}
|
||
}
|
||
|
||
void Segment::moveY(int delta, bool wrap) {
|
||
if (!isActive() || !delta) return; // not active
|
||
const int vW = vWidth(); // segment width in logical pixels (can be 0 if segment is inactive)
|
||
const int vH = vHeight(); // segment height in logical pixels (is always >= 1)
|
||
int absDelta = abs(delta);
|
||
if (absDelta >= vH) return;
|
||
uint32_t newPxCol[vH];
|
||
int newDelta;
|
||
int stop = vH;
|
||
int start = 0;
|
||
if (wrap) newDelta = (delta + vH) % vH; // +rows in case delta < 0
|
||
else {
|
||
if (delta < 0) start = absDelta;
|
||
stop = vH - absDelta;
|
||
newDelta = delta > 0 ? delta : 0;
|
||
}
|
||
for (int x = 0; x < vW; x++) {
|
||
for (int y = 0; y < stop; y++) {
|
||
int srcY = y + newDelta;
|
||
if (wrap) srcY %= vH; // Wrap using modulo when `wrap` is true
|
||
newPxCol[y] = getPixelColorXY(x, srcY);
|
||
}
|
||
for (int y = 0; y < stop; y++) setPixelColorXY(x, y + start, newPxCol[y]);
|
||
}
|
||
}
|
||
|
||
// move() - move all pixels in desired direction delta number of pixels
|
||
// @param dir direction: 0=left, 1=left-up, 2=up, 3=right-up, 4=right, 5=right-down, 6=down, 7=left-down
|
||
// @param delta number of pixels to move
|
||
// @param wrap around
|
||
void Segment::move(unsigned dir, unsigned delta, bool wrap) {
|
||
if (delta==0) return;
|
||
switch (dir) {
|
||
case 0: moveX( delta, wrap); break;
|
||
case 1: moveX( delta, wrap); moveY( delta, wrap); break;
|
||
case 2: moveY( delta, wrap); break;
|
||
case 3: moveX(-delta, wrap); moveY( delta, wrap); break;
|
||
case 4: moveX(-delta, wrap); break;
|
||
case 5: moveX(-delta, wrap); moveY(-delta, wrap); break;
|
||
case 6: moveY(-delta, wrap); break;
|
||
case 7: moveX( delta, wrap); moveY(-delta, wrap); break;
|
||
}
|
||
}
|
||
|
||
void Segment::drawCircle(uint16_t cx, uint16_t cy, uint8_t radius, uint32_t col, bool soft) {
|
||
if (!isActive() || radius == 0) return; // not active
|
||
if (soft) {
|
||
// Xiaolin Wu’s algorithm
|
||
const int rsq = radius*radius;
|
||
int x = 0;
|
||
int y = radius;
|
||
unsigned oldFade = 0;
|
||
while (x < y) {
|
||
float yf = sqrtf(float(rsq - x*x)); // needs to be floating point
|
||
uint8_t fade = float(0xFF) * (ceilf(yf) - yf); // how much color to keep
|
||
if (oldFade > fade) y--;
|
||
oldFade = fade;
|
||
int px, py;
|
||
for (uint8_t i = 0; i < 16; i++) {
|
||
int swaps = (i & 0x4 ? 1 : 0); // 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1
|
||
int adj = (i < 8) ? 0 : 1; // 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1
|
||
int dx = (i & 1) ? -1 : 1; // 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1
|
||
int dy = (i & 2) ? -1 : 1; // 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1
|
||
if (swaps) {
|
||
px = cx + (y - adj) * dx;
|
||
py = cy + x * dy;
|
||
} else {
|
||
px = cx + x * dx;
|
||
py = cy + (y - adj) * dy;
|
||
}
|
||
uint32_t pixCol = getPixelColorXY(px, py);
|
||
setPixelColorXY(px, py, adj ?
|
||
color_blend(pixCol, col, fade) :
|
||
color_blend(col, pixCol, fade));
|
||
}
|
||
x++;
|
||
}
|
||
} else {
|
||
// pre-scale color for all pixels
|
||
col = color_fade(col, _segBri);
|
||
_colorScaled = true;
|
||
// Bresenham’s Algorithm
|
||
int d = 3 - (2*radius);
|
||
int y = radius, x = 0;
|
||
while (y >= x) {
|
||
for (int i = 0; i < 4; i++) {
|
||
int dx = (i & 1) ? -x : x;
|
||
int dy = (i & 2) ? -y : y;
|
||
setPixelColorXY(cx + dx, cy + dy, col);
|
||
setPixelColorXY(cx + dy, cy + dx, col);
|
||
}
|
||
x++;
|
||
if (d > 0) {
|
||
y--;
|
||
d += 4 * (x - y) + 10;
|
||
} else {
|
||
d += 4 * x + 6;
|
||
}
|
||
}
|
||
_colorScaled = false;
|
||
}
|
||
}
|
||
|
||
// by stepko, taken from https://editor.soulmatelights.com/gallery/573-blobs
|
||
void Segment::fillCircle(uint16_t cx, uint16_t cy, uint8_t radius, uint32_t col, bool soft) {
|
||
if (!isActive() || radius == 0) return; // not active
|
||
const int vW = vWidth(); // segment width in logical pixels (can be 0 if segment is inactive)
|
||
const int vH = vHeight(); // segment height in logical pixels (is always >= 1)
|
||
// draw soft bounding circle
|
||
if (soft) drawCircle(cx, cy, radius, col, soft);
|
||
// pre-scale color for all pixels
|
||
col = color_fade(col, _segBri);
|
||
_colorScaled = true;
|
||
// fill it
|
||
for (int y = -radius; y <= radius; y++) {
|
||
for (int x = -radius; x <= radius; x++) {
|
||
if (x * x + y * y <= radius * radius &&
|
||
int(cx)+x >= 0 && int(cy)+y >= 0 &&
|
||
int(cx)+x < vW && int(cy)+y < vH)
|
||
setPixelColorXY(cx + x, cy + y, col);
|
||
}
|
||
}
|
||
_colorScaled = false;
|
||
}
|
||
|
||
//line function
|
||
void Segment::drawLine(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint32_t c, bool soft) {
|
||
if (!isActive()) return; // not active
|
||
const int vW = vWidth(); // segment width in logical pixels (can be 0 if segment is inactive)
|
||
const int vH = vHeight(); // segment height in logical pixels (is always >= 1)
|
||
if (x0 >= vW || x1 >= vW || y0 >= vH || y1 >= vH) return;
|
||
|
||
const int dx = abs(x1-x0), sx = x0<x1 ? 1 : -1; // x distance & step
|
||
const int dy = abs(y1-y0), sy = y0<y1 ? 1 : -1; // y distance & step
|
||
|
||
// single pixel (line length == 0)
|
||
if (dx+dy == 0) {
|
||
setPixelColorXY(x0, y0, c);
|
||
return;
|
||
}
|
||
|
||
if (soft) {
|
||
// Xiaolin Wu’s algorithm
|
||
const bool steep = dy > dx;
|
||
if (steep) {
|
||
// we need to go along longest dimension
|
||
std::swap(x0,y0);
|
||
std::swap(x1,y1);
|
||
}
|
||
if (x0 > x1) {
|
||
// we need to go in increasing fashion
|
||
std::swap(x0,x1);
|
||
std::swap(y0,y1);
|
||
}
|
||
float gradient = x1-x0 == 0 ? 1.0f : float(y1-y0) / float(x1-x0);
|
||
float intersectY = y0;
|
||
for (int x = x0; x <= x1; x++) {
|
||
uint8_t keep = float(0xFF) * (intersectY-int(intersectY)); // how much color to keep
|
||
uint8_t seep = 0xFF - keep; // how much background to keep
|
||
int y = int(intersectY);
|
||
if (steep) std::swap(x,y); // temporaryly swap if steep
|
||
// pixel coverage is determined by fractional part of y co-ordinate
|
||
setPixelColorXY(x, y, color_blend(c, getPixelColorXY(x, y), keep));
|
||
setPixelColorXY(x+int(steep), y+int(!steep), color_blend(c, getPixelColorXY(x+int(steep), y+int(!steep)), seep));
|
||
intersectY += gradient;
|
||
if (steep) std::swap(x,y); // restore if steep
|
||
}
|
||
} else {
|
||
// pre-scale color for all pixels
|
||
c = color_fade(c, _segBri);
|
||
_colorScaled = true;
|
||
// Bresenham's algorithm
|
||
int err = (dx>dy ? dx : -dy)/2; // error direction
|
||
for (;;) {
|
||
setPixelColorXY(x0, y0, c);
|
||
if (x0==x1 && y0==y1) break;
|
||
int e2 = err;
|
||
if (e2 >-dx) { err -= dy; x0 += sx; }
|
||
if (e2 < dy) { err += dx; y0 += sy; }
|
||
}
|
||
_colorScaled = false;
|
||
}
|
||
}
|
||
|
||
#include "src/font/console_font_4x6.h"
|
||
#include "src/font/console_font_5x8.h"
|
||
#include "src/font/console_font_5x12.h"
|
||
#include "src/font/console_font_6x8.h"
|
||
#include "src/font/console_font_7x9.h"
|
||
|
||
// draws a raster font character on canvas
|
||
// only supports: 4x6=24, 5x8=40, 5x12=60, 6x8=48 and 7x9=63 fonts ATM
|
||
void Segment::drawCharacter(unsigned char chr, int16_t x, int16_t y, uint8_t w, uint8_t h, uint32_t color, uint32_t col2, int8_t rotate, bool usePalGrad) {
|
||
if (!isActive()) return; // not active
|
||
if (chr < 32 || chr > 126) return; // only ASCII 32-126 supported
|
||
chr -= 32; // align with font table entries
|
||
const int font = w*h;
|
||
|
||
CRGB col = CRGB(color);
|
||
CRGBPalette16 grad = CRGBPalette16(col, col2 ? CRGB(col2) : col);
|
||
if(usePalGrad) grad = SEGPALETTE; // selected palette as gradient
|
||
|
||
//if (w<5 || w>6 || h!=8) return;
|
||
for (int i = 0; i<h; i++) { // character height
|
||
uint8_t bits = 0;
|
||
switch (font) {
|
||
case 24: bits = pgm_read_byte_near(&console_font_4x6[(chr * h) + i]); break; // 5x8 font
|
||
case 40: bits = pgm_read_byte_near(&console_font_5x8[(chr * h) + i]); break; // 5x8 font
|
||
case 48: bits = pgm_read_byte_near(&console_font_6x8[(chr * h) + i]); break; // 6x8 font
|
||
case 63: bits = pgm_read_byte_near(&console_font_7x9[(chr * h) + i]); break; // 7x9 font
|
||
case 60: bits = pgm_read_byte_near(&console_font_5x12[(chr * h) + i]); break; // 5x12 font
|
||
default: return;
|
||
}
|
||
uint32_t c = ColorFromPaletteWLED(grad, (i+1)*255/h, 255, NOBLEND);
|
||
// pre-scale color for all pixels
|
||
c = color_fade(c, _segBri);
|
||
_colorScaled = true;
|
||
for (int j = 0; j<w; j++) { // character width
|
||
int x0, y0;
|
||
switch (rotate) {
|
||
case -1: x0 = x + (h-1) - i; y0 = y + (w-1) - j; break; // -90 deg
|
||
case -2:
|
||
case 2: x0 = x + j; y0 = y + (h-1) - i; break; // 180 deg
|
||
case 1: x0 = x + i; y0 = y + j; break; // +90 deg
|
||
default: x0 = x + (w-1) - j; y0 = y + i; break; // no rotation
|
||
}
|
||
if (x0 < 0 || x0 >= (int)vWidth() || y0 < 0 || y0 >= (int)vHeight()) continue; // drawing off-screen
|
||
if (((bits>>(j+(8-w))) & 0x01)) { // bit set
|
||
setPixelColorXY(x0, y0, c);
|
||
}
|
||
}
|
||
_colorScaled = false;
|
||
}
|
||
}
|
||
|
||
#define WU_WEIGHT(a,b) ((uint8_t) (((a)*(b)+(a)+(b))>>8))
|
||
void Segment::wu_pixel(uint32_t x, uint32_t y, CRGB c) { //awesome wu_pixel procedure by reddit u/sutaburosu
|
||
if (!isActive()) return; // not active
|
||
// extract the fractional parts and derive their inverses
|
||
unsigned xx = x & 0xff, yy = y & 0xff, ix = 255 - xx, iy = 255 - yy;
|
||
// calculate the intensities for each affected pixel
|
||
uint8_t wu[4] = {WU_WEIGHT(ix, iy), WU_WEIGHT(xx, iy),
|
||
WU_WEIGHT(ix, yy), WU_WEIGHT(xx, yy)};
|
||
// multiply the intensities by the colour, and saturating-add them to the pixels
|
||
for (int i = 0; i < 4; i++) {
|
||
int wu_x = (x >> 8) + (i & 1); // precalculate x
|
||
int wu_y = (y >> 8) + ((i >> 1) & 1); // precalculate y
|
||
CRGB led = getPixelColorXY(wu_x, wu_y);
|
||
CRGB oldLed = led;
|
||
led.r = qadd8(led.r, c.r * wu[i] >> 8);
|
||
led.g = qadd8(led.g, c.g * wu[i] >> 8);
|
||
led.b = qadd8(led.b, c.b * wu[i] >> 8);
|
||
if (led != oldLed) setPixelColorXY(wu_x, wu_y, led); // don't repaint if same color
|
||
}
|
||
}
|
||
#undef WU_WEIGHT
|
||
|
||
#endif // WLED_DISABLE_2D
|