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Implement native 0x202 color interpolation

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This commit is contained in:
gamer147
2026-07-10 20:49:03 -04:00
parent d6d1be984e
commit 8731d6389c
13 changed files with 300 additions and 53 deletions
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23
godot/Main.cs
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@@ -297,7 +297,8 @@ public partial class Main : Godot.Control
outcome = $"FILL tint=0x{v.Tint:x6} a={fillA:0.00} {baseW}x{baseH}@({dstX},{dstY}) " +
$"base=({v.DstX},{v.DstY}) anchor=({t.AnchorX:0.0},{t.AnchorY:0.0}) " +
$"scale=({t.ScaleX:0.00},{t.ScaleY:0.00}) " +
$"trans=({t.TranslateX:0.0},{t.TranslateY:0.0}) rot={v.Rotation.AngleDegrees:0.0}";
$"trans=({t.TranslateX:0.0},{t.TranslateY:0.0}) rot={v.Rotation.AngleDegrees:0.0}" +
ColorTimeline(v.ColorTransition);
}
else outcome = "SKIP(no-resId, opaque render-target)";
}
@@ -308,14 +309,15 @@ public partial class Main : Godot.Control
else
{
BlitLayer(bmp, v.ColorKey, v.Tint, strength, v.SrcX, v.SrcY, v.W, v.H,
localToDest, opacity);
localToDest, opacity, v.MultiplyTint);
var raw = _vm.Gfx.TryGet(v.Handle);
outcome = $"slot={raw?.SourceSlot} DRAWN resId=0x{v.SurfaceResId:x} {System.IO.Path.GetFileName(bmp)} " +
$"src=({v.SrcX},{v.SrcY} {v.W}x{v.H}) base=({v.DstX},{v.DstY}) " +
$"anchor=({t.AnchorX:0.0},{t.AnchorY:0.0}) dst=({dstX},{dstY}) " +
$"scale=({t.ScaleX:0.00},{t.ScaleY:0.00}) trans=({t.TranslateX:0.0},{t.TranslateY:0.0}) " +
$"rot=({t.RotationAngleDegrees:0.0}+{v.Rotation.AngleDegrees:0.0}) " +
$"op={opacity:0.00} tintStr={strength:0.00}";
$"mode={raw?.StaticColorMode} op={opacity:0.00} tintStr={strength:0.00}" +
ColorTimeline(v.ColorTransition);
}
}
decisions?.Add(v.Handle, $"z{z} {outcome}");
@@ -325,6 +327,11 @@ public partial class Main : Godot.Control
if (decisions != null) LogGfxDecisionChanges(decisions);
}
private static string ColorTimeline(Age.Engine.Model.ColorTransitionState? state)
=> state is { } c
? $" color=0x{c.Current:x8}->0x{c.Target:x8} colorProgress={c.Progress:0.000}"
: "";
// Native type-0 surface commands first leave range A in normal z-order, then alpha-composite range B
// into the target surface. SC0000 binds that target to handle+2, above both source handles, so drawing
// range B here with progress produces old*(1-progress)+new*progress without disturbing ambient channels.
@@ -349,7 +356,7 @@ public partial class Main : Godot.Control
var bmp = _host.ResolveResIdTexture(source.SurfaceResId);
if (bmp == null) continue;
BlitLayer(bmp, source.ColorKey, source.Tint, source.TintStrength / 255f,
source.SrcX, source.SrcY, source.W, source.H, affine, opacity);
source.SrcX, source.SrcY, source.W, source.H, affine, opacity, source.MultiplyTint);
}
drawn++;
}
@@ -388,10 +395,10 @@ public partial class Main : Godot.Control
// Blit one object's surface rect. The source Image is cached per (path, colorKey): on first load, texels
// matching the surface colorkey are made transparent (native bakes the key at load — engine-re.md §Blend).
// tintStrength (0..1, the op 0x202/0x203 alpha) LERPs the texel RGB toward tint (0=keep texel, 1=full tint;
// fade-to-black uses tint=black, strength=1); alpha is the object's OPACITY (independent of the tint).
// Mode 0 uses tintStrength to LERP texel RGB toward tint. Mode 1 sets multiplyTint and uses packed RGB as
// multiplicative modulation while alpha is object opacity.
private void BlitLayer(string bmpPath, long colorKey, long tint, float tintStrength, int srcX, int srcY, int w, int h,
Age.Engine.Model.Affine2D localToDest, float alpha = 1f)
Age.Engine.Model.Affine2D localToDest, float alpha = 1f, bool multiplyTint = false)
{
var cacheKey = (bmpPath, colorKey);
if (!_imgCache.TryGetValue(cacheKey, out var src))
@@ -416,7 +423,7 @@ public partial class Main : Godot.Control
byte[] dst = _screen.GetData(); byte[] ss = src.GetData();
Age.Engine.Model.SoftwareAffineRasterizer.BlitRgba(
dst, _screen.GetWidth(), _screen.GetHeight(), ss, src.GetWidth(), src.GetHeight(),
srcX, srcY, sw, sh, localToDest, tint, tintStrength, alpha);
srcX, srcY, sw, sh, localToDest, tint, tintStrength, alpha, multiplyTint);
_screen.SetData(_screen.GetWidth(), _screen.GetHeight(), false, _screen.GetFormat(), dst);
}