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Minor perf improvements

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Move repeat calculations from inner loop to outer loop
Extract some methods for reusability
This commit is contained in:
Kurt 2020-04-09 14:35:09 -07:00
parent 91418e9c66
commit cf889668d3
2 changed files with 25 additions and 12 deletions
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28
NHSE.Sprites/Field/FieldItemSpriteDrawer.cs
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@ -32,20 +32,26 @@ private static int[] GetBitmapLayerAcre(FieldItemLayer layer, int x0, int y0, ou
width = layer.GridWidth;
var bmpData = new int[width * height];
LoadPixelsFromLayer(layer, x0, y0, width, bmpData);
return bmpData;
}
private static void LoadPixelsFromLayer(FieldItemLayer layer, int x0, int y0, int width, int[] bmpData)
{
var stride = layer.GridWidth;
for (int x = 0; x < stride; x++)
for (int y = 0; y < stride; y++)
{
for (int y = 0; y < stride; y++)
var baseIndex = (y * width);
for (int x = 0; x < stride; x++)
{
var tile = layer.GetTile(x + x0, y + y0);
var color = FieldItemSprite.GetItemColor(tile).ToArgb();
var i = (y * width) + x;
bmpData[i] = color;
var index = baseIndex + x;
bmpData[index] = color;
}
}
return bmpData;
}
public static Bitmap GetBitmapLayerAcre(FieldItemLayer layer, int x0, int y0, int scale)
@ -99,11 +105,12 @@ private static void DrawGrid(int[] data, int w, int h, int scale)
const int grid = -0x777778; // 0xFF888888u
// Horizontal Lines
for (int x = 0; x < w; x++)
for (int y = scale; y < h; y += scale)
{
for (int y = scale; y < h; y += scale)
var baseIndex = y * w;
for (int x = 0; x < w; x++)
{
var index = (y * w) + x;
var index = baseIndex + x;
data[index] = grid;
}
}
@ -111,9 +118,10 @@ private static void DrawGrid(int[] data, int w, int h, int scale)
// Vertical Lines
for (int y = 0; y < h; y++)
{
var baseIndex = y * w;
for (int x = scale; x < w; x += scale)
{
var index = (y * w) + x;
var index = baseIndex + x;
data[index] = grid;
}
}

9
NHSE.Sprites/Util/ImageUtil.cs
View File

@ -68,6 +68,13 @@ public static int[] ScalePixelImage(int[] data, int scale, int w, int h, out int
fH = scale * h;
var scaled = new int[fW * fH];
ScalePixelImage(data, scaled, fW, fH, scale);
return scaled;
}
private static void ScalePixelImage(int[] data, int[] scaled, int fW, int fH, int scale)
{
// For each pixel, copy to the X indexes, then block copy the row to the other rows.
for (int y = 0, i = 0; y < fH; y += scale)
{
@ -85,8 +92,6 @@ public static int[] ScalePixelImage(int[] data, int scale, int w, int h, out int
for (int y1 = 1; y1 < scale; y1++)
Array.Copy(scaled, baseIndex, scaled, baseIndex + (y1 * fW), fW);
}
return scaled;
}
}
}