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-rw-r--r--src/video_core/pica.h3
-rw-r--r--src/video_core/rasterizer.cpp25
2 files changed, 28 insertions, 0 deletions
diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index c20bf99d4..23fc6b9ba 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -266,6 +266,9 @@ struct Regs {
AddSigned = 3,
Lerp = 4,
Subtract = 5,
+
+ MultiplyThenAdd = 8,
+ AddThenMultiply = 9,
};
union {
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index 9cad5f9b6..eacca82e5 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -419,6 +419,25 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0,
return result.Cast<u8>();
}
+ case Operation::MultiplyThenAdd:
+ {
+ auto result = (input[0] * input[1] + 255 * input[2].Cast<int>()) / 255;
+ result.r() = std::min(255, result.r());
+ result.g() = std::min(255, result.g());
+ result.b() = std::min(255, result.b());
+ return result.Cast<u8>();
+ }
+
+ case Operation::AddThenMultiply:
+ {
+ auto result = input[0] + input[1];
+ result.r() = std::min(255, result.r());
+ result.g() = std::min(255, result.g());
+ result.b() = std::min(255, result.b());
+ result = (result * input[2].Cast<int>()) / 255;
+ return result.Cast<u8>();
+ }
+
default:
LOG_ERROR(HW_GPU, "Unknown color combiner operation %d\n", (int)op);
UNIMPLEMENTED();
@@ -443,6 +462,12 @@ static void ProcessTriangleInternal(const VertexShader::OutputVertex& v0,
case Operation::Subtract:
return std::max(0, (int)input[0] - (int)input[1]);
+ case Operation::MultiplyThenAdd:
+ return std::min(255, (input[0] * input[1] + 255 * input[2]) / 255);
+
+ case Operation::AddThenMultiply:
+ return (std::min(255, (input[0] + input[1])) * input[2]) / 255;
+
default:
LOG_ERROR(HW_GPU, "Unknown alpha combiner operation %d\n", (int)op);
UNIMPLEMENTED();