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coryleachcoryleach
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Texture scaling
1 parent 36810fe commit 5479886

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3 files changed

+162
-9
lines changed

3 files changed

+162
-9
lines changed

‎Runtime/Utility/TextureScale.cs

Lines changed: 141 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,141 @@
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using System.Collections.Generic;
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using UnityEngine;
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using System.Threading.Tasks;
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namespace Gameframe.Procgen
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{
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// Only works on ARGB32, RGB24 and Alpha8 textures that are marked readable
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public static class TextureScale
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{
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public class TaskData
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{
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public int start;
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public int end;
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public TaskData(int s, int e)
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{
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start = s;
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end = e;
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}
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}
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public static async Task PointAsync(Texture2D tex, int newWidth, int newHeight)
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{
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await ThreadedScaleAsync(tex, newWidth, newHeight, false);
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}
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public static async Task BilinearAsync(Texture2D tex, int newWidth, int newHeight)
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{
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await ThreadedScaleAsync(tex, newWidth, newHeight, true);
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}
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private static async Task ThreadedScaleAsync(Texture2D tex, int newWidth, int newHeight, bool useBilinear)
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{
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var texColors = tex.GetPixels();
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var newColors = new Color[newWidth * newHeight];
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float ratioX;
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float ratioY;
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if (useBilinear)
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{
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ratioX = 1.0f / ((float) newWidth / (tex.width - 1));
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ratioY = 1.0f / ((float) newHeight / (tex.height - 1));
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}
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else
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{
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ratioX = ((float) tex.width) / newWidth;
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ratioY = ((float) tex.height) / newHeight;
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}
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var width = tex.width;
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var cores = Mathf.Min(SystemInfo.processorCount, newHeight);
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var slice = newHeight / cores;
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var tasks = new List<Task>();
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if (cores > 1)
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{
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for (var i = 0; i < cores; i++)
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{
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var taskData = new TaskData(slice * i, slice * (i + 1));
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var task = Task.Run(() =>
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{
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if (useBilinear)
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{
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BilinearScale(taskData,texColors,newColors,width,newWidth,ratioX,ratioY);
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}
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else
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{
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PointScale(taskData,texColors,newColors,width,newWidth,ratioX,ratioY);
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}
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});
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tasks.Add(task);
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}
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await Task.WhenAll(tasks);
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}
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else
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{
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var taskData = new TaskData(0, newHeight);
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await Task.Run(() =>
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{
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if (useBilinear)
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{
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BilinearScale(taskData,texColors,newColors,width,newWidth,ratioX,ratioY);
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}
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else
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{
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PointScale(taskData,texColors,newColors,width,newWidth,ratioX,ratioY);
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}
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});
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}
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tex.Resize(newWidth, newHeight);
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tex.SetPixels(newColors);
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tex.Apply();
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}
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private static void BilinearScale(TaskData taskData, Color[] texColors, Color[] newColors, int width, int newWidth, float ratioX, float ratioY)
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{
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for (var y = taskData.start; y < taskData.end; y++)
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{
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int yFloor = (int) Mathf.Floor(y * ratioY);
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var y1 = yFloor * width;
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var y2 = (yFloor + 1) * width;
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var yw = y * newWidth;
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for (var x = 0; x < newWidth; x++)
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{
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int xFloor = (int) Mathf.Floor(x * ratioX);
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var xLerp = x * ratioX - xFloor;
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newColors[yw + x] = ColorLerpUnclamped(
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ColorLerpUnclamped(texColors[y1 + xFloor], texColors[y1 + xFloor + 1], xLerp),
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ColorLerpUnclamped(texColors[y2 + xFloor], texColors[y2 + xFloor + 1], xLerp),
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y * ratioY - yFloor);
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}
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}
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}
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private static void PointScale(TaskData taskData, Color[] texColors, Color[] newColors, int width, int newWidth, float ratioX, float ratioY)
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{
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for (var y = taskData.start; y < taskData.end; y++)
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{
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var thisY = (int) (ratioY * y) * width;
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var yw = y * newWidth;
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for (var x = 0; x < newWidth; x++)
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{
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newColors[yw + x] = texColors[(int) (thisY + ratioX * x)];
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}
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}
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}
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private static Color ColorLerpUnclamped(Color c1, Color c2, float value)
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{
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return new Color(c1.r + (c2.r - c1.r) * value,
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c1.g + (c2.g - c1.g) * value,
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c1.b + (c2.b - c1.b) * value,
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c1.a + (c2.a - c1.a) * value);
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}
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}
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}

‎Runtime/Utility/TextureScale.cs.meta

Lines changed: 11 additions & 0 deletions
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‎Runtime/WorldMap/Views/WorldMapTextureView.cs

Lines changed: 10 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -4,14 +4,12 @@ namespace Gameframe.Procgen
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{
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public class WorldMapTextureView : MonoBehaviour, IWorldMapView
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{
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[SerializeField] private Renderer _renderer = null;
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[SerializeField] private Material _material = null;
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[SerializeField] private bool mainTexture = false;
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[SerializeField] private string texturePropertyName = "_BaseMap";
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[SerializeField] private TerrainTable _terrainTable = null;
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[SerializeField] private bool scaleRenderer = false;
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[SerializeField] private bool gradiate = false;
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[SerializeField] private bool fillRegions = false;
@@ -24,7 +22,10 @@ public class WorldMapTextureView : MonoBehaviour, IWorldMapView
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[SerializeField] private Color[] regionColors = new Color[0];
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[SerializeField] private FilterMode filterMode = FilterMode.Point;
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public void DisplayMap(WorldMapData worldMapData)
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[SerializeField] private bool scaleTexture = false;
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[SerializeField] private float textureScale = 2f;
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public async void DisplayMap(WorldMapData worldMapData)
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{
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var heightMapLayer = worldMapData.GetLayer<HeightMapLayerData>();
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var regionMapLayer = worldMapData.GetLayer<RegionMapLayerData>();
@@ -98,21 +99,21 @@ public void DisplayMap(WorldMapData worldMapData)
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texture.filterMode = filterMode;
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SetTexture(texture);
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101-
if (scaleRenderer)
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if (scaleTexture)
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{
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_renderer.transform.localScale = new Vector3(width, height, 1);
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await TextureScale.BilinearAsync(texture, Mathf.Min(2048,Mathf.RoundToInt(width * textureScale)), Mathf.Min(2048,Mathf.RoundToInt(height * textureScale)));
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}
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}
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private void SetTexture(Texture2D texture)
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{
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if (!mainTexture)
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{
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_renderer.sharedMaterial.SetTexture(texturePropertyName, texture);
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_material.SetTexture(texturePropertyName, texture);
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}
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else
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{
115-
_renderer.sharedMaterial.mainTexture = texture;
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_material.mainTexture = texture;
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}
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}
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