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alexbevi
GitHub Repository: alexbevi/BizHawk
 Path: blob/master/libsnes/lsnes_patches/0004-Fix-mouse-polling.patch
2 views
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From 160dedf35571478781737ee35307b9321cfb41bb Mon Sep 17 00:00:00 2001

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From: Ilari Liusvaara <[email protected]>

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Date: Wed, 7 Mar 2012 16:57:18 +0200

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Subject: [PATCH 4/4] Fix mouse polling

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Don't poll for mouse motion excessive number of times (no need to poll it for

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each bit!)

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---

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 snes/controller/mouse/mouse.cpp |   12 ++++++++++--

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 snes/controller/mouse/mouse.hpp |    2 ++

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 2 files changed, 12 insertions(+), 2 deletions(-)

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diff --git a/snes/controller/mouse/mouse.cpp b/snes/controller/mouse/mouse.cpp

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index 6b26fae..824ecd3 100755

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--- snes/controller/mouse/mouse.cpp

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+++ snes/controller/mouse/mouse.cpp

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@@ -3,8 +3,10 @@

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 uint2 Mouse::data() {

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   if(counter >= 32) return 1;

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-  int position_x = interface->inputPoll(port, Input::Device::Mouse, 0, (unsigned)Input::MouseID::X);  //-n = left, 0 = center, +n = right

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-  int position_y = interface->inputPoll(port, Input::Device::Mouse, 0, (unsigned)Input::MouseID::Y);  //-n = up,   0 = center, +n = down

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+  if(counter == 0) {

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+    position_x = interface->inputPoll(port, Input::Device::Mouse, 0, (unsigned)Input::MouseID::X);  //-n = left, 0 = center, +n = right

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+    position_y = interface->inputPoll(port, Input::Device::Mouse, 0, (unsigned)Input::MouseID::Y);  //-n = up,   0 = center, +n = down

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+  }

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   bool direction_x = position_x < 0;  //0 = right, 1 = left

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   bool direction_y = position_y < 0;  //0 = down,  1 = up

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@@ -67,10 +69,16 @@ void Mouse::serialize(serializer& s) {

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   unsigned char block[Controller::SaveSize] = {0};

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   block[0] = latched ? 1 : 0;

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   block[1] = counter;

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+  block[2] = (unsigned short)position_x >> 8;

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+  block[3] = (unsigned short)position_x;

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+  block[4] = (unsigned short)position_y >> 8;

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+  block[5] = (unsigned short)position_y;

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   s.array(block, Controller::SaveSize);

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   if(s.mode() == nall::serializer::Load) {

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     latched = (block[0] != 0);

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     counter = block[1];

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+    position_x = (short)(((unsigned short)block[2] << 8) | (unsigned short)block[3]);

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+    position_y = (short)(((unsigned short)block[4] << 8) | (unsigned short)block[5]);

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   }

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 }

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diff --git a/snes/controller/mouse/mouse.hpp b/snes/controller/mouse/mouse.hpp

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index b66ea51..6074f34 100755

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--- snes/controller/mouse/mouse.hpp

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+++ snes/controller/mouse/mouse.hpp

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@@ -6,4 +6,6 @@ struct Mouse : Controller {

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 private:

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   bool latched;

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   unsigned counter;

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+  int position_x;

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+  int position_y;

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 };

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-- 

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1.7.9.48.g85da4d

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