Add subsetting to SkScaledCodec

src/codec/SkBmpRLECodec.cpp

Index: src/codec/SkBmpRLECodec.cpp
diff --git a/src/codec/SkBmpRLECodec.cpp b/src/codec/SkBmpRLECodec.cpp
index b2d3ebdf5abf8fd36521fcd12206b8b22656350d..686630054fed917288381b69c674508a54e17598 100644
--- a/src/codec/SkBmpRLECodec.cpp
+++ b/src/codec/SkBmpRLECodec.cpp
@@ -196,7 +196,7 @@ size_t SkBmpRLECodec::checkForMoreData() {
 void SkBmpRLECodec::setPixel(void* dst, size_t dstRowBytes,
                              const SkImageInfo& dstInfo, uint32_t x, uint32_t y,
                              uint8_t index) {
-    if (is_coord_necessary(x, fSampleX, dstInfo.width())) {
+    if (is_coord_necessary(x, fSampleX, this->subsetWidth(), this->subsetLeft())) {
         // Set the row
         uint32_t row = this->getDstRow(y, dstInfo.height());
 
@@ -229,7 +229,7 @@ void SkBmpRLECodec::setRGBPixel(void* dst, size_t dstRowBytes,
                                 const SkImageInfo& dstInfo, uint32_t x,
                                 uint32_t y, uint8_t red, uint8_t green,
                                 uint8_t blue) {
-    if (is_coord_necessary(x, fSampleX, dstInfo.width())) {
+    if (is_coord_necessary(x, fSampleX, this->subsetWidth(), this->subsetLeft())) {
         // Set the row
         uint32_t row = this->getDstRow(y, dstInfo.height());