From 09dabb2e351bb57516233792698557f3aab042f7 Mon Sep 17 00:00:00 2001
From: mrfaptastic <12006953+mrfaptastic@users.noreply.github.com>
Date: Tue, 8 Dec 2020 07:35:47 +0000
Subject: [PATCH] GraphicsLayer minor tweaks

---
 examples/GraphicsLayer/GraphicsLayer.ino | 25 ++++++++++++++++++++++--
 examples/GraphicsLayer/Layer.cpp         | 22 +++++++++++----------
 2 files changed, 35 insertions(+), 12 deletions(-)

diff --git a/examples/GraphicsLayer/GraphicsLayer.ino b/examples/GraphicsLayer/GraphicsLayer.ino
index fbc33ad..2c15d18 100644
--- a/examples/GraphicsLayer/GraphicsLayer.ino
+++ b/examples/GraphicsLayer/GraphicsLayer.ino
@@ -86,6 +86,7 @@ void setup() {
 
 }
 
+int LayerCompositor_mode = 0;
 void loop() {
   
    for (int x = 0; x <  dma_display.width(); x++) {
@@ -119,8 +120,28 @@ void loop() {
          *  Step 3: Merge foreground and background layers and send to the matrix panel!
          *  Use our special sauce LayerCompositor functions
          */
-         LayerCompositor::Siloette(dma_display, bgLayer, textLayer);
-         //LayerCompositor::Stack(dma_display, bgLayer, textLayer);
+         switch (LayerCompositor_mode)
+         {
+          case 0:
+            LayerCompositor::Siloette(dma_display, bgLayer, textLayer);
+            break;
+
+          case 1:
+            LayerCompositor::Stack(dma_display, bgLayer, textLayer);
+            break;
+
+          case 2:
+            LayerCompositor::Blend(dma_display, bgLayer, textLayer);
+            break;          
+         }
+
+        EVERY_N_SECONDS(5) { // FastLED Macro
+          LayerCompositor_mode++;
+          dma_display.clearScreen();
+          if (LayerCompositor_mode > 2) LayerCompositor_mode = 0;          
+        }         
+         
+         //
          // LayerCompositor::Blend(dma_display, bgLayer, textLayer, 127);
         
 } // end loop
diff --git a/examples/GraphicsLayer/Layer.cpp b/examples/GraphicsLayer/Layer.cpp
index 5c419c1..4352398 100644
--- a/examples/GraphicsLayer/Layer.cpp
+++ b/examples/GraphicsLayer/Layer.cpp
@@ -295,8 +295,6 @@ namespace LayerCompositor
 		 */
         void Siloette(MatrixPanel_I2S_DMA &disp, const Layer &_bgLayer, const Layer &_fgLayer)
 		{
-				//const Layer *bg = &_bgLayer;
-				//const Layer *fg = &_fgLayer;
 
 				for (int y = 0; y < LAYER_HEIGHT; y++) {
 					for (int x = 0; x < LAYER_WIDTH; x++)
@@ -327,15 +325,19 @@ namespace LayerCompositor
 			{
 				for (int x = 0; x < LAYER_WIDTH; x++)
 				{
-						/*
-						  	// set the blend ratio for the video cross fade
-							// (set ratio to 127 for a constant 50% / 50% blend)
-							uint8_t ratio = beatsin8(5);
-						*/
-
-             // (set ratio to 127 for a constant 50% / 50% blend)
-						_pixel = blend(_bgLayer.pixels->data[y][x], _fgLayer.pixels->data[y][x], ratio);
+						
+						_pixel = _bgLayer.pixels->data[y][x];
+					
+						// (set ratio to 127 for a constant 50% / 50% blend)
+						//_pixel = blend(_bgLayer.pixels->data[y][x], _fgLayer.pixels->data[y][x], ratio);
 
+						// Blend with background if foreground pixel isn't clear/transparent
+						if (_fgLayer.pixels->data[y][x] != _fgLayer.transparency_colour)
+						{
+							_pixel = blend(_bgLayer.pixels->data[y][x], _fgLayer.pixels->data[y][x], ratio);
+						} // if the foreground is transparent, then print whatever is the bg
+						
+						
 						// https://gist.github.com/StefanPetrick/0c0d54d0f35ea9cca983
 						disp.drawPixelRGB888(x,y, _pixel.r, _pixel.g, _pixel.b );