generic utilities for working with imageData

ImageUtil.cpp

@@ -0,0 +1,55 @@
+#include "ImageUtil.h"
+
+namespace sc2util {
+
+	bool isSet(const sc2::GameInfo & info, const sc2::ImageData & grid, const sc2::Point2D & point)
+	{
+		sc2::Point2DI pointI((int)point.x, (int)point.y);
+		return isSet(info, grid, pointI);
+	}
+
+	bool isSet(const sc2::GameInfo & info, const sc2::ImageData & grid, const sc2::Point2DI & pointI)
+	{
+		if (pointI.x < 0 || pointI.x >= info.width || pointI.y < 0 || pointI.y >= info.width)
+		{
+			return false;
+		}
+		unsigned char encodedPlacement = grid.data[pointI.x + ((info.height - 1) - pointI.y) * info.width];
+		bool decodedPlacement = encodedPlacement == 255 ? false : true;
+		return decodedPlacement;
+	}
+
+	bool set(sc2::GameInfo & info, sc2::ImageData & grid, const sc2::Point2D & point, bool b)
+	{
+		sc2::Point2DI pointI((int)point.x, (int)point.y);
+		return set(info, grid, pointI, b);
+	}
+
+	bool set(sc2::GameInfo & info, sc2::ImageData & grid, const sc2::Point2DI & pointI, bool b)
+	{
+		if (pointI.x < 0 || pointI.x >= info.width || pointI.y < 0 || pointI.y >= info.width)
+		{
+			return false;
+		}
+		unsigned char encodedPlacement = b ? 0 : 255;
+		auto index = pointI.x + ((info.height - 1) - pointI.y) * info.width;
+		grid.data[index] = encodedPlacement;
+		return true;
+	}
+
+	bool setBuildingAt(sc2::GameInfo & info, sc2::ImageData & grid, const sc2::Point2D & pos, int footprint, bool b)
+	{
+		using namespace sc2;
+		float fx = pos.x - (float)footprint / 2.0f;
+		float fy = pos.y - (float)footprint / 2.0f;
+
+		Point2D point(fx, fy);
+		auto inzone = sc2::Point2DI((int)point.x, (int)point.y);
+		for (int y = 0; y < footprint; y++) {
+			for (int x = 0; x < footprint; x++) {
+				set(info, grid, Point2DI(inzone.x + x, inzone.y + y), !b);
+			}
+		}
+		return true;
+	}
+}

ImageUtil.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "sc2api/sc2_map_info.h"
+
+// API for manipulation of grid data as a matrix of bool indexed by Position
+namespace sc2util {
+
+	// query pathing grid at given point
+	bool isSet(const sc2::GameInfo & info, const sc2::ImageData & grid, const sc2::Point2D & point);
+	bool isSet(const sc2::GameInfo & info, const sc2::ImageData & grid, const sc2::Point2DI & point);
+	// updates 
+	bool set(sc2::GameInfo & info, sc2::ImageData & grid, const sc2::Point2D & point, bool b);
+	bool set(sc2::GameInfo & info, sc2::ImageData & grid, const sc2::Point2DI & point, bool b);
+
+	bool setBuildingAt(sc2::GameInfo & info, sc2::ImageData & grid, const sc2::Point2D & pos, int footprint, bool b);
+}