From 6ca752ccbc7c59dab66f476ca02d3b53527c57da Mon Sep 17 00:00:00 2001
From: Tony Wasserka <NeoBrainX@gmail.com>
Date: Sat, 3 Jan 2015 13:33:57 +0100
Subject: [PATCH] Pica/TextureUnit: Implement mirrored repeating texture
wrapping.
---
src/video_core/pica.h | 5 +++--
src/video_core/rasterizer.cpp | 10 +++++++++-
2 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index ef9809d573..c20bf99d48 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -118,8 +118,9 @@ struct Regs {
struct TextureConfig {
enum WrapMode : u32 {
- ClampToEdge = 0,
- Repeat = 2,
+ ClampToEdge = 0,
+ Repeat = 2,
+ MirroredRepeat = 3,
};
INSERT_PADDING_WORDS(0x1);
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index 65dddb47c1..f788122d8a 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -251,7 +251,15 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0,
return val;
case Regs::TextureConfig::Repeat:
- return (int)(((unsigned)val) % size);
+ return (int)((unsigned)val % size);
+
+ case Regs::TextureConfig::MirroredRepeat:
+ {
+ int val = (int)((unsigned)val % (2 * size));
+ if (val >= size)
+ val = 2 * size - 1 - val;
+ return val;
+ }
default:
LOG_ERROR(HW_GPU, "Unknown texture coordinate wrapping mode %x\n", (int)mode);
--
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