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Code Issues Releases Wiki Activity

Add blit functions

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This commit is contained in:
Andrew Cassidy 2020-06-14 01:54:33 -07:00
parent 8acf17f189
commit ecb3eccfe5
2 changed files with 132 additions and 0 deletions
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1
Source/ConformalDecals/ConformalDecals.csproj
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@ -65,6 +65,7 @@
<Compile Include="Properties\AssemblyInfo.cs" />
<Compile Include="Util\Logging.cs" />
<Compile Include="Util\OrientedBounds.cs" />
<Compile Include="Util\TextureUtils.cs" />
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
<PropertyGroup>

131
Source/ConformalDecals/Util/TextureUtils.cs Normal file
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@ -0,0 +1,131 @@
using UnityEngine;
namespace ConformalDecals.Util {
public static class TextureUtils {
public static void BlitRect(
Texture2D src, Color32[] srcColors, Vector2Int srcPos,
Texture2D dst, Color32[] dstColors, Vector2Int dstPos,
Vector2Int size) {
if (srcPos.x < 0) {
size.x += srcPos.x;
dstPos.x -= srcPos.x;
srcPos.x = 0;
}
if (srcPos.y < 0) {
size.y += srcPos.y;
dstPos.y -= srcPos.y;
srcPos.y = 0;
}
if (dstPos.x < 0) {
size.x += dstPos.x;
srcPos.x -= dstPos.x;
dstPos.x = 0;
}
if (dstPos.y < 0) {
size.y += dstPos.y;
srcPos.y -= dstPos.y;
dstPos.y = 0;
}
if (srcPos.x + size.x > src.width) size.x = src.width - srcPos.x;
if (srcPos.y + size.y > src.height) size.y = src.height - srcPos.y;
if (dstPos.x + size.x > dst.width) size.x = dst.width - srcPos.x;
if (dstPos.y + size.y > dst.height) size.y = dst.height - srcPos.y;
if (size.x <= 0) return;
if (size.y <= 0) return;
int srcIndex = srcPos.x + srcPos.y * src.width;
int dstIndex = dstPos.x + dstPos.y * dst.width;
for (int dy = 0; dy < size.y; dy++) {
for (int dx = 0; dx < size.x; dx++) {
dstColors[dstIndex + dx] = srcColors[srcIndex + dx];
}
srcIndex += src.width;
dstIndex += dst.width;
}
}
public static void BlitRectBilinear(
Texture2D src, Vector2Int srcPos, Vector2 srcSize,
Texture2D dst, Color32[] dstColors, Vector2Int dstPos, Vector2Int dstSize) {
var sizeRatio = dstSize / srcSize;
if (srcPos.x < 0) {
dstSize.x += (int) (srcPos.x * sizeRatio.x);
dstPos.x -= (int) (srcPos.x * sizeRatio.x);
srcSize.x += srcPos.x;
srcPos.x = 0;
}
if (srcPos.y < 0) {
dstSize.y += (int) (srcPos.y * sizeRatio.y);
dstPos.y -= (int) (srcPos.y * sizeRatio.y);
srcSize.y += srcPos.y;
srcPos.y = 0;
}
if (dstPos.x < 0) {
srcSize.x += dstPos.x / sizeRatio.x;
srcPos.x -= (int) (dstPos.x / sizeRatio.x);
dstSize.x += dstPos.x;
dstPos.x = 0;
}
if (dstPos.y < 0) {
srcSize.y += dstPos.y / sizeRatio.y;
srcPos.y -= (int) (dstPos.y / sizeRatio.y);
dstSize.y += dstPos.y;
dstPos.y = 0;
}
if (srcPos.x + srcSize.x > src.width) {
srcSize.x = src.width - srcPos.x;
dstSize.x = (int) (srcSize.x * sizeRatio.x);
}
if (srcPos.y + srcSize.y > src.height) {
srcSize.y = src.height - srcPos.y;
dstSize.y = (int) (srcSize.y * sizeRatio.y);
}
if (dstPos.x + dstSize.x > dst.width) {
dstSize.x = dst.width - srcPos.x;
srcSize.x = (int) (dstSize.x / sizeRatio.x);
}
if (dstPos.y + dstSize.y > dst.height) {
dstSize.y = dst.height - srcPos.y;
srcSize.y = (int) (dstSize.y / sizeRatio.y);
}
var srcPixel = new Vector2(1.0f / src.width, 1.0f / src.height);
var srcStart = (srcPos * srcPixel) + (srcPixel / 2);
var srcStep = sizeRatio * srcPixel;
var srcY = srcStart.y;
int dstIndex = dstPos.x + dstPos.y * dst.width;
for (int dy = 0; dy < dstSize.y; dy++) {
var srcX = srcStart.x;
for (int dx = 0; dx < dstSize.x; dx++) {
dstColors[dstIndex + dx] = src.GetPixelBilinear(srcX, srcY);
srcX += srcStep.x;
}
srcY += srcStep.y;
dstIndex += dst.width;
}
}
}
}