[Reland] Relocate shaders to own dir

Consolidate all shader impls under src/shaders/.

(reland of https://skia-review.googlesource.com/c/17927/)

Change-Id: I7918bdc1aafe842ed194412ba95b9ae53a2ec1d7
Reviewed-on: https://skia-review.googlesource.com/18146
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>

1 files changed, 58 insertions, 0 deletions

diff --git a/src/shaders/SkImageShader.h b/src/shaders/SkImageShader.h
new file mode 100644
index 0000000000..7be982c5c6
--- /dev/null
+++ b/src/shaders/SkImageShader.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkImageShader_DEFINED
+#define SkImageShader_DEFINED
+
+#include "SkBitmapProcShader.h"
+#include "SkColorSpaceXformer.h"
+#include "SkImage.h"
+#include "SkShaderBase.h"
+
+class SkImageShader : public SkShaderBase {
+public:
+    static sk_sp<SkShader> Make(sk_sp<SkImage>, TileMode tx, TileMode ty,
+                                const SkMatrix* localMatrix);
+
+    bool isOpaque() const override;
+
+    SK_TO_STRING_OVERRIDE()
+    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkImageShader)
+
+#if SK_SUPPORT_GPU
+    sk_sp<GrFragmentProcessor> asFragmentProcessor(const AsFPArgs&) const override;
+#endif
+
+    SkImageShader(sk_sp<SkImage>, TileMode tx, TileMode ty, const SkMatrix* localMatrix);
+
+protected:
+    void flatten(SkWriteBuffer&) const override;
+    Context* onMakeContext(const ContextRec&, SkArenaAlloc* storage) const override;
+#ifdef SK_SUPPORT_LEGACY_SHADER_ISABITMAP
+    bool onIsABitmap(SkBitmap*, SkMatrix*, TileMode*) const override;
+#endif
+    SkImage* onIsAImage(SkMatrix*, TileMode*) const override;
+
+    bool onAppendStages(SkRasterPipeline*, SkColorSpace*, SkArenaAlloc*,
+                        const SkMatrix& ctm, const SkPaint&, const SkMatrix*) const override;
+
+    sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer* xformer) const override {
+        return xformer->apply(fImage.get())->makeShader(fTileModeX, fTileModeY,
+                                                        &this->getLocalMatrix());
+    }
+
+    sk_sp<SkImage>  fImage;
+    const TileMode  fTileModeX;
+    const TileMode  fTileModeY;
+
+private:
+    friend class SkShaderBase;
+
+    typedef SkShaderBase INHERITED;
+};
+
+#endif