From 92c363da428985eee677acac0a3ba10c83ec1093 Mon Sep 17 00:00:00 2001
From: subhransu mohanty <sub.mohanty@samsung.com>
Date: Mon, 6 Aug 2018 10:19:57 +0900
Subject: [PATCH] lottie/render: Implement drawRle() with position information.

Change-Id: Ia5bbcf911baaaa4b684045a6ac28c4dcfc14f841
---
 src/vector/vdrawhelper.cpp | 11 ++++-------
 src/vector/vdrawhelper.h   | 23 +++++++++++++++++------
 src/vector/vpainter.cpp    |  4 +++-
 3 files changed, 24 insertions(+), 14 deletions(-)

diff --git a/src/vector/vdrawhelper.cpp b/src/vector/vdrawhelper.cpp
index 76f1212..2b07529 100644
--- a/src/vector/vdrawhelper.cpp
+++ b/src/vector/vdrawhelper.cpp
@@ -496,8 +496,7 @@ static void blendColorARGB(int count, const VRle::Span *spans, void *userData)
     if (op.mode == VPainter::CompModeSrc) {
         // inline for performance
         while (count--) {
-            uint *target =
-                ((uint *)data->mRasterBuffer->scanLine(spans->y)) + spans->x;
+            uint *target = data->buffer(spans->x, spans->y);
             if (spans->coverage == 255) {
                 memfill32(target, color, spans->len);
             } else {
@@ -512,8 +511,7 @@ static void blendColorARGB(int count, const VRle::Span *spans, void *userData)
     }
 
     while (count--) {
-        uint *target =
-            ((uint *)data->mRasterBuffer->scanLine(spans->y)) + spans->x;
+        uint *target = data->buffer(spans->x, spans->y);
         op.funcSolid(target, spans->len, color, spans->coverage);
         ++spans;
     }
@@ -531,9 +529,8 @@ static void blendGradientARGB(int count, const VRle::Span *spans,
     if (!op.srcFetch) return;
 
     while (count--) {
-        uint *target =
-            ((uint *)data->mRasterBuffer->scanLine(spans->y)) + spans->x;
-        int length = spans->len;
+        uint *target = data->buffer(spans->x, spans->y);
+        int   length = spans->len;
         while (length) {
             int l = std::min(length, BLEND_GRADIENT_BUFFER_SIZE);
             op.srcFetch(buffer, &op, data, spans->y, spans->x, l);
diff --git a/src/vector/vdrawhelper.h b/src/vector/vdrawhelper.h
index 3ca9c43..2009298 100644
--- a/src/vector/vdrawhelper.h
+++ b/src/vector/vdrawhelper.h
@@ -111,12 +111,22 @@ struct VSpanData {
     };
     enum class Type { None, Solid, LinearGradient, RadialGradient };
 
-    void updateSpanFunc();
-    void init(VRasterBuffer *image);
-    void setup(const VBrush &            brush,
-               VPainter::CompositionMode mode = VPainter::CompModeSrcOver,
-               int                       alpha = 255);
-    void setupMatrix(const VMatrix &matrix);
+    void  updateSpanFunc();
+    void  init(VRasterBuffer *image);
+    void  setup(const VBrush &            brush,
+                VPainter::CompositionMode mode = VPainter::CompModeSrcOver,
+                int                       alpha = 255);
+    void  setupMatrix(const VMatrix &matrix);
+    void  setPos(const VPoint &pos) { mPos = pos; }
+    VRect clipRect() const
+    {
+        return mSystemClip.translated(-mPos.x(), -mPos.y());
+    }
+
+    uint *buffer(int x, int y) const
+    {
+        return (uint *)(mRasterBuffer->scanLine(y + mPos.y())) + x + mPos.x();
+    }
 
     VRasterBuffer *                      mRasterBuffer;
     ProcessRleSpan                       mBlendFunc;
@@ -124,6 +134,7 @@ struct VSpanData {
     VRect                                mSystemClip;
     VSpanData::Type                      mType;
     std::shared_ptr<VSpanData::Pinnable> mCachedGradient;
+    VPoint                               mPos;
     union {
         uint32_t      mSolid;
         VGradientData mGradient;
diff --git a/src/vector/vpainter.cpp b/src/vector/vpainter.cpp
index c4bba88..064f634 100644
--- a/src/vector/vpainter.cpp
+++ b/src/vector/vpainter.cpp
@@ -19,8 +19,10 @@ void VPainterImpl::drawRle(const VPoint &pos, const VRle &rle)
 
     if (!mSpanData.mUnclippedBlendFunc) return;
 
+    mSpanData.setPos(pos);
+
     // do draw after applying clip.
-    rle.intersect(mSpanData.mSystemClip, mSpanData.mUnclippedBlendFunc,
+    rle.intersect(mSpanData.clipRect(), mSpanData.mUnclippedBlendFunc,
                   &mSpanData);
 }
 
-- 
2.7.4