From f9be06b15f08cb559580e1d19b43158640a37d67 Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Wed, 2 Dec 2015 13:23:51 -0500
Subject: PICA: Implement scissor test

---
 src/video_core/pica.h | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

(limited to 'src/video_core/pica.h')

diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index 09702d46a..065a3fd0c 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -115,7 +115,36 @@ struct Regs {
         BitField<24, 5, Semantic> map_w;
     } vs_output_attributes[7];
 
-    INSERT_PADDING_WORDS(0x11);
+    INSERT_PADDING_WORDS(0xe);
+
+    enum class ScissorMode : u32 {
+        Disabled = 0,
+        Exclude = 1, // Exclude pixels inside the scissor box
+
+        Include = 3 // Exclude pixels outside the scissor box
+    };
+
+    struct {
+        BitField<0, 2, ScissorMode> mode;
+
+        union {
+            BitField< 0, 16, u32> right;
+            BitField<16, 16, u32> bottom;
+        };
+
+        union {
+            BitField< 0, 16, u32> left_minus_1;
+            BitField<16, 16, u32> top_minus_1;
+        };
+
+        u32 GetTop() const {
+            return top_minus_1 + 1;
+        }
+
+        u32 GetLeft() const {
+            return left_minus_1 + 1;
+        }
+    } scissor_test;
 
     union {
         BitField< 0, 10, s32> x;
@@ -1328,6 +1357,7 @@ ASSERT_REG_POSITION(viewport_depth_range, 0x4d);
 ASSERT_REG_POSITION(viewport_depth_near_plane, 0x4e);
 ASSERT_REG_POSITION(vs_output_attributes[0], 0x50);
 ASSERT_REG_POSITION(vs_output_attributes[1], 0x51);
+ASSERT_REG_POSITION(scissor_test, 0x65);
 ASSERT_REG_POSITION(viewport_corner, 0x68);
 ASSERT_REG_POSITION(depthmap_enable, 0x6D);
 ASSERT_REG_POSITION(texture0_enable, 0x80);
-- 
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