include/utils/SkLuaCanvas.h

/*
 * Copyright 2013 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkLuaCanvas_DEFINED
#define SkLuaCanvas_DEFINED

#include "SkCanvas.h"
#include "SkString.h"
#include "SkVertices.h"

struct lua_State;

class SkLuaCanvas : public SkCanvas {
public:
    void pushThis();

    SkLuaCanvas(int width, int height, lua_State*, const char function[]);
    virtual ~SkLuaCanvas();

protected:
    void willSave() override;
    SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override;
    void willRestore() override;

    void didConcat(const SkMatrix&) override;
    void didSetMatrix(const SkMatrix&) override;

    void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
    virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
                            const SkPaint&) override;
    virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
                               const SkPaint&) override;
    virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
                                SkScalar constY, const SkPaint&) override;
    virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
                                  const SkMatrix* matrix, const SkPaint&) override;
    void onDrawTextRSXform(const void* text, size_t byteLength, const SkRSXform xform[],
                           const SkRect* cull, const SkPaint& paint) override;
    virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
                                const SkPaint& paint) override;

    void onDrawPaint(const SkPaint&) override;
    void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override;
    void onDrawRect(const SkRect&, const SkPaint&) override;
    void onDrawOval(const SkRect&, const SkPaint&) override;
    void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override;
    void onDrawRRect(const SkRRect&, const SkPaint&) override;
    void onDrawPath(const SkPath&, const SkPaint&) override;
    void onDrawBitmap(const SkBitmap&, SkScalar left, SkScalar top, const SkPaint*) override;
    void onDrawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst, const SkPaint*,
                          SrcRectConstraint) override;
    void onDrawImage(const SkImage*, SkScalar left, SkScalar top, const SkPaint*) override;
    void onDrawImageRect(const SkImage*, const SkRect* src, const SkRect& dst,
                         const SkPaint*, SrcRectConstraint) override;
    void onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst,
                          const SkPaint*) override;
    void onDrawVertices(VertexMode vmode, int vertexCount,
                        const SkPoint vertices[], const SkPoint texs[],
                        const SkColor colors[], SkBlendMode,
                        const uint16_t indices[], int indexCount,
                        const SkPaint&) override;
    void onDrawVerticesObject(sk_sp<SkVertices> vertices, SkBlendMode mode, const SkPaint& paint,
                              uint32_t flags) override {
        this->onDrawVerticesObjectFallback(std::move(vertices), mode, paint, flags);
    }

    void onClipRect(const SkRect&, SkClipOp, ClipEdgeStyle) override;
    void onClipRRect(const SkRRect&, SkClipOp, ClipEdgeStyle) override;
    void onClipPath(const SkPath&, SkClipOp, ClipEdgeStyle) override;
    void onClipRegion(const SkRegion&, SkClipOp) override;

    void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override;

private:
    lua_State*  fL;
    SkString    fFunc;

    void sendverb(const char verb[]);

    typedef SkCanvas INHERITED;
};

#endif