From 18f6cd0163fa894b7cabd11290f2a2f46820c2e9 Mon Sep 17 00:00:00 2001
From: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>
Date: Tue, 1 Dec 2015 13:05:25 +0100
Subject: NEON optimized qimagescale

Adds a NEON optimized version of the QImage smooth scaling.

Change-Id: I27c0a24d25f66bda3b5c55a8fabdb8b583fcd5c6
Reviewed-by: Erik Verbruggen <erik.verbruggen@theqtcompany.com>
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
---
 src/gui/painting/qimagescale.cpp | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'src/gui/painting/qimagescale.cpp')

diff --git a/src/gui/painting/qimagescale.cpp b/src/gui/painting/qimagescale.cpp
index 33dccc5374..d51d0bf4a8 100644
--- a/src/gui/painting/qimagescale.cpp
+++ b/src/gui/painting/qimagescale.cpp
@@ -277,6 +277,18 @@ void qt_qimageScaleAARGBA_down_xy_sse4(QImageScaleInfo *isi, unsigned int *dest,
                                        int dw, int dh, int dow, int sow);
 #endif
 
+#if defined(__ARM_NEON__)
+template<bool RGB>
+void qt_qimageScaleAARGBA_up_x_down_y_neon(QImageScaleInfo *isi, unsigned int *dest,
+                                           int dw, int dh, int dow, int sow);
+template<bool RGB>
+void qt_qimageScaleAARGBA_down_x_up_y_neon(QImageScaleInfo *isi, unsigned int *dest,
+                                           int dw, int dh, int dow, int sow);
+template<bool RGB>
+void qt_qimageScaleAARGBA_down_xy_neon(QImageScaleInfo *isi, unsigned int *dest,
+                                       int dw, int dh, int dow, int sow);
+#endif
+
 static void qt_qimageScaleAARGBA_up_xy(QImageScaleInfo *isi, unsigned int *dest,
                                        int dw, int dh, int dow, int sow)
 {
@@ -329,6 +341,10 @@ static void qt_qimageScaleAARGBA(QImageScaleInfo *isi, unsigned int *dest,
         if (qCpuHasFeature(SSE4_1))
             qt_qimageScaleAARGBA_up_x_down_y_sse4<false>(isi, dest, dw, dh, dow, sow);
         else
+#elif defined(__ARM_NEON__)
+        if (qCpuHasFeature(NEON))
+            qt_qimageScaleAARGBA_up_x_down_y_neon<false>(isi, dest, dw, dh, dow, sow);
+        else
 #endif
         qt_qimageScaleAARGBA_up_x_down_y(isi, dest, dw, dh, dow, sow);
     }
@@ -338,6 +354,10 @@ static void qt_qimageScaleAARGBA(QImageScaleInfo *isi, unsigned int *dest,
         if (qCpuHasFeature(SSE4_1))
             qt_qimageScaleAARGBA_down_x_up_y_sse4<false>(isi, dest, dw, dh, dow, sow);
         else
+#elif defined(__ARM_NEON__)
+        if (qCpuHasFeature(NEON))
+            qt_qimageScaleAARGBA_down_x_up_y_neon<false>(isi, dest, dw, dh, dow, sow);
+        else
 #endif
         qt_qimageScaleAARGBA_down_x_up_y(isi, dest, dw, dh, dow, sow);
     }
@@ -347,6 +367,10 @@ static void qt_qimageScaleAARGBA(QImageScaleInfo *isi, unsigned int *dest,
         if (qCpuHasFeature(SSE4_1))
             qt_qimageScaleAARGBA_down_xy_sse4<false>(isi, dest, dw, dh, dow, sow);
         else
+#elif defined(__ARM_NEON__)
+        if (qCpuHasFeature(NEON))
+            qt_qimageScaleAARGBA_down_xy_neon<false>(isi, dest, dw, dh, dow, sow);
+        else
 #endif
         qt_qimageScaleAARGBA_down_xy(isi, dest, dw, dh, dow, sow);
     }
@@ -522,6 +546,10 @@ static void qt_qimageScaleAARGB(QImageScaleInfo *isi, unsigned int *dest,
         if (qCpuHasFeature(SSE4_1))
             qt_qimageScaleAARGBA_up_x_down_y_sse4<true>(isi, dest, dw, dh, dow, sow);
         else
+#elif defined(__ARM_NEON__)
+        if (qCpuHasFeature(NEON))
+            qt_qimageScaleAARGBA_up_x_down_y_neon<true>(isi, dest, dw, dh, dow, sow);
+        else
 #endif
         qt_qimageScaleAARGB_up_x_down_y(isi, dest, dw, dh, dow, sow);
     }
@@ -531,6 +559,10 @@ static void qt_qimageScaleAARGB(QImageScaleInfo *isi, unsigned int *dest,
         if (qCpuHasFeature(SSE4_1))
             qt_qimageScaleAARGBA_down_x_up_y_sse4<true>(isi, dest, dw, dh, dow, sow);
         else
+#elif defined(__ARM_NEON__)
+        if (qCpuHasFeature(NEON))
+            qt_qimageScaleAARGBA_down_x_up_y_neon<true>(isi, dest, dw, dh, dow, sow);
+        else
 #endif
         qt_qimageScaleAARGB_down_x_up_y(isi, dest, dw, dh, dow, sow);
     }
@@ -540,6 +572,10 @@ static void qt_qimageScaleAARGB(QImageScaleInfo *isi, unsigned int *dest,
         if (qCpuHasFeature(SSE4_1))
             qt_qimageScaleAARGBA_down_xy_sse4<true>(isi, dest, dw, dh, dow, sow);
         else
+#elif defined(__ARM_NEON__)
+        if (qCpuHasFeature(NEON))
+            qt_qimageScaleAARGBA_down_xy_neon<true>(isi, dest, dw, dh, dow, sow);
+        else
 #endif
         qt_qimageScaleAARGB_down_xy(isi, dest, dw, dh, dow, sow);
     }
-- 
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