Fix multisampled line rendering.
Bug swiftshader:99
Bug chromium:820461
Change-Id: I2232c27d57aedff03293b37607f97ead56c056c9
Reviewed-on: https://swiftshader-review.googlesource.com/17808
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
diff --git a/src/Renderer/Renderer.cpp b/src/Renderer/Renderer.cpp
index 2bb699a..7282e38 100644
--- a/src/Renderer/Renderer.cpp
+++ b/src/Renderer/Renderer.cpp
@@ -1758,30 +1758,26 @@
dx *= scale;
dy *= scale;
- float dx0w = dx * P0.w / W;
- float dy0h = dy * P0.w / H;
float dx0h = dx * P0.w / H;
float dy0w = dy * P0.w / W;
- float dx1w = dx * P1.w / W;
- float dy1h = dy * P1.w / H;
float dx1h = dx * P1.w / H;
float dy1w = dy * P1.w / W;
- P[0].x += -dy0w + -dx0w;
- P[0].y += -dx0h + +dy0h;
+ P[0].x += -dy0w;
+ P[0].y += +dx0h;
C[0] = clipper->computeClipFlags(P[0]);
- P[1].x += -dy1w + +dx1w;
- P[1].y += -dx1h + +dy1h;
+ P[1].x += -dy1w;
+ P[1].y += +dx1h;
C[1] = clipper->computeClipFlags(P[1]);
- P[2].x += +dy1w + +dx1w;
- P[2].y += +dx1h + -dy1h;
+ P[2].x += +dy1w;
+ P[2].y += -dx1h;
C[2] = clipper->computeClipFlags(P[2]);
- P[3].x += +dy0w + -dx0w;
- P[3].y += +dx0h + +dy0h;
+ P[3].x += +dy0w;
+ P[3].y += -dx0h;
C[3] = clipper->computeClipFlags(P[3]);
if((C[0] & C[1] & C[2] & C[3]) == Clipper::CLIP_FINITE)
