Added subpixel-rendering as well as blurring methods to Window.

include/Window.h

@@ -19,6 +19,7 @@ public:
 	void clear();
 	void clear(CRGB* color);
 	void setPixel(uint8_t x, uint8_t y, CRGB* color);
+	void setSubPixel(accum88 x, accum88 y, CRGB* color);
 	void setPixelByIndex(uint16_t index, CRGB* color);
 	void raisePixel(uint8_t x, uint8_t y, CRGB* color);
 	void line(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, CRGB* color);
@@ -27,7 +28,19 @@ public:
 	void circle(uint8_t x, uint8_t y, uint8_t r, CRGB* color);
 	uint16_t coordsToGlobalIndex(uint8_t x, uint8_t y);
 	uint16_t localToGlobalIndex(uint16_t);
-	void drawChar(Font* f, uint8_t x, uint8_t y, const char c, CRGB* color, bool mask=false);
+	void drawChar(Font* f, accum88 x, accum88 y, const char c, CRGB* color, bool mask=false);
+	void drawText(Font* f, uint16_t x, uint16_t y, String s, CRGB* color);
+	void drawSubText(Font* f, accum88 x, accum88 y, String s, CRGB* color);
 	void addPixelColor(uint16_t index, CRGB* color);
+	void addPixelColor(uint8_t x, uint8_t y, CRGB* color);
+	CRGB get_pixel(uint8_t x, uint8_t y);
 	void fadeToBlackBy(fract8 speed);
+	void shift_down();
+	void shift_down_and_blur();
+	void clear_row(uint8_t y);
+	void blur(fract8 intensity);
+	void blur_rows(fract8 intensity);
+	void blur_row(uint8_t y, fract8 intensity);
+	void blur_columns(fract8 intensity);
+	void blur_column(uint8_t x, fract8 intensity);
 };

src/Window.cpp

@@ -41,7 +41,19 @@ void Window::clear(CRGB* color) {
 	for(int x=0; x<this->width; x++) for(int y=0; y<this->height; y++) this->setPixel(x, y, color);
 }
 
-void Window::drawChar(Font* font, uint8_t xPos, uint8_t yPos, const char c, CRGB* color, bool mask) {
+void Window::drawText(Font* font, uint16_t x, uint16_t y, String text, CRGB* color) {
+	for (int i=0; i<text.length(); i++) {
+		drawChar(font, (x+(i*(font->width + 1))<<8), (y<<8), text[i], color);
+	}
+}
+
+void Window::drawSubText(Font* font, accum88 x, accum88 y, String text, CRGB* color) {
+	for (int i=0; i<text.length(); i++) {
+		drawChar(font, x+(i*((font->width + 1)<<8)), y, text[i], color);
+	}
+}
+
+void Window::drawChar(Font* font, accum88 xPos, accum88 yPos, const char c, CRGB* color, bool mask) {
 	if (!font->isCharAllowed(c)) return;
 	uint16_t position = font->getCharPosition(c);
 	uint8_t* data = new uint8_t[font->width];
@@ -50,16 +62,87 @@ void Window::drawChar(Font* font, uint8_t xPos, uint8_t yPos, const char c, CRGB
 	for(uint8_t y=0; y<font->height; y++) for(uint8_t x=0; x<font->width; x++) {
 		bool on = (data[x]>>(font->height - 1 - y) & 1) * 255;
 		if (mask) on = !on;
-		if (on) this->setPixel(x + xPos, y + yPos, color);
+		if (on) this->setSubPixel(xPos + (x<<8), yPos + (y<<8), color);
 	}
 
 	free(data);
 }
 
+void Window::clear_row(uint8_t y) {
+	CRGB black(0x000000);
+	for (uint8_t x=0; x<this->width; x++) this->setPixel(x, y, &black);
+}
+
+void Window::shift_down() {
+	for (uint8_t y=this->height-1; y>=1; y--) {
+		for (uint8_t x=0; x<this->width; x++) {
+			leds[coordsToGlobalIndex(x, y)] = leds[coordsToGlobalIndex(x, y-1)];
+		}
+	}
+	
+	clear_row(0);
+}
+
+void Window::shift_down_and_blur() {
+	shift_down();
+	for (uint8_t y=1; y<this->height; y++) {
+		blur_row(y, 128);
+	}
+}
+
+void Window::blur(fract8 intensity) {
+	blur_rows(intensity);
+	blur_columns(intensity);
+}
+
+void Window::blur_rows(fract8 intensity) {
+	for (uint8_t y=0; y<this->height; y++) {
+		blur_row(y, intensity);
+	}
+}
+
+void Window::blur_columns(fract8 intensity) {
+	for (uint8_t x=0; x<this->width; x++) {
+		blur_column(x, intensity);
+	}
+}
+
+void Window::blur_row(uint8_t y, fract8 intensity) {
+	uint16_t idx1 = coordsToGlobalIndex(0, y);
+	uint16_t idx2 = coordsToGlobalIndex(this->width - 1, y);
+	blur1d(&(leds[idx1 < idx2 ? idx1 : idx2]), this->width, intensity);
+}
+
+void Window::blur_column(uint8_t x, fract8 intensity) {
+	// Reimplementation from FastLEDs blurColumns
+	uint8_t keep = 255 - intensity;
+	uint8_t seep = intensity >> 1;
+	CRGB carryover = CRGB::Black;
+
+	for (uint8_t y=0; y<this->height; y++) {
+		CRGB cur = leds[coordsToGlobalIndex(x, y)];
+		CRGB part = cur;
+		part.nscale8(seep);
+		cur.nscale8(keep);
+		cur += carryover;
+		if (y>0) leds[coordsToGlobalIndex(x, y-1)] += part;
+		leds[coordsToGlobalIndex(x, y)] = cur;
+		carryover = part;
+	}
+}
+
 void Window::addPixelColor(uint16_t index, CRGB* color) {
 	leds[localToGlobalIndex(index)] += *color;
 }
 
+void Window::addPixelColor(uint8_t x, uint8_t y, CRGB* color) {
+	leds[coordsToGlobalIndex(x, y)] += *color;
+}
+
+CRGB Window::get_pixel(uint8_t x, uint8_t y) {
+	return leds[coordsToGlobalIndex(x, y)];
+}
+
 void Window::fadeToBlackBy(fract8 speed) {
 	for (uint8_t x=0; x<this->width; x++) for(uint8_t y=0; y<this->height; y++) {
 		leds[coordsToGlobalIndex(x, y)].nscale8(255 - speed);
@@ -135,3 +218,40 @@ void Window::lineWithAngle(uint8_t x, uint8_t y, uint8_t angle, uint8_t startdis
 
 	line(x1, y1, x2, y2, color);
 }
+
+void Window::setSubPixel(accum88 x, accum88 y, CRGB* color) {
+	uint8_t px, py;
+	// px = Part of next pixel to fill
+	// x = "Origin pixel"
+	px = x & 0xFF;
+	py = y & 0xFF;
+	x = x >> 8;
+	y = y >> 8;
+	
+	CRGB c;
+	c = CRGB(dim8_video( scale8( scale8( color->r, 255-py), 255-px)),
+	         dim8_video( scale8( scale8( color->g, 255-py), 255-px)),
+	         dim8_video( scale8( scale8( color->b, 255-py), 255-px)));
+	this->addPixelColor(x, y, &c);
+	
+	if (px) {
+		c = CRGB(dim8_video( scale8( scale8( color->r, 255-py), px)), 
+		         dim8_video( scale8( scale8( color->g, 255-py), px)),
+		         dim8_video( scale8( scale8( color->b, 255-py), px)));
+		this->addPixelColor(x+1, y, &c);
+	}
+	
+	if (py) {
+		c = CRGB(dim8_video( scale8( scale8( color->r, py), 255-px)), 
+		         dim8_video( scale8( scale8( color->g, py), 255-px)),
+		         dim8_video( scale8( scale8( color->b, py), 255-px)));
+		this->addPixelColor(x, y+1, &c);
+	}
+	
+	if (px || py) {
+		c = CRGB(dim8_video( scale8( scale8( color->r, py), px)), 
+		         dim8_video( scale8( scale8( color->g, py), px)),
+		         dim8_video( scale8( scale8( color->b, py), px)));
+		this->addPixelColor(x+1, y+1, &c);
+	}
+}