michael@0: /*
michael@0:  * Copyright 2013 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #include "SkLuaCanvas.h"
michael@0: #include "SkLua.h"
michael@0: 
michael@0: extern "C" {
michael@0:     #include "lua.h"
michael@0:     #include "lauxlib.h"
michael@0: }
michael@0: 
michael@0: class AutoCallLua : public SkLua {
michael@0: public:
michael@0:     AutoCallLua(lua_State* L, const char func[], const char verb[]) : INHERITED(L) {
michael@0:         lua_getglobal(L, func);
michael@0:         if (!lua_isfunction(L, -1)) {
michael@0:             int t = lua_type(L, -1);
michael@0:             SkDebugf("--- expected function %d\n", t);
michael@0:         }
michael@0: 
michael@0:         lua_newtable(L);
michael@0:         this->pushString(verb, "verb");
michael@0:     }
michael@0: 
michael@0:     ~AutoCallLua() {
michael@0:         lua_State* L = this->get();
michael@0:         if (lua_pcall(L, 1, 0, 0) != LUA_OK) {
michael@0:             SkDebugf("lua err: %s\n", lua_tostring(L, -1));
michael@0:         }
michael@0:         lua_settop(L, -1);
michael@0:     }
michael@0: 
michael@0:     void pushEncodedText(SkPaint::TextEncoding, const void*, size_t);
michael@0: 
michael@0: private:
michael@0:     typedef SkLua INHERITED;
michael@0: };
michael@0: 
michael@0: #define AUTO_LUA(verb)  AutoCallLua lua(fL, fFunc.c_str(), verb)
michael@0: 
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: void AutoCallLua::pushEncodedText(SkPaint::TextEncoding enc, const void* text,
michael@0:                                   size_t length) {
michael@0:     switch (enc) {
michael@0:         case SkPaint::kUTF8_TextEncoding:
michael@0:             this->pushString((const char*)text, length, "text");
michael@0:             break;
michael@0:         case SkPaint::kUTF16_TextEncoding: {
michael@0:             SkString str;
michael@0:             str.setUTF16((const uint16_t*)text, length);
michael@0:             this->pushString(str, "text");
michael@0:         } break;
michael@0:         case SkPaint::kGlyphID_TextEncoding:
michael@0:             this->pushArrayU16((const uint16_t*)text, SkToInt(length >> 1),
michael@0:                                "glyphs");
michael@0:             break;
michael@0:         case SkPaint::kUTF32_TextEncoding:
michael@0:             break;
michael@0:     }
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: void SkLuaCanvas::pushThis() {
michael@0:     SkLua(fL).pushCanvas(this);
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: SkLuaCanvas::SkLuaCanvas(int width, int height, lua_State* L, const char func[])
michael@0:     : INHERITED(width, height)
michael@0:     , fL(L)
michael@0:     , fFunc(func) {
michael@0: }
michael@0: 
michael@0: SkLuaCanvas::~SkLuaCanvas() {}
michael@0: 
michael@0: void SkLuaCanvas::willSave(SaveFlags flags) {
michael@0:     AUTO_LUA("save");
michael@0:     this->INHERITED::willSave(flags);
michael@0: }
michael@0: 
michael@0: SkCanvas::SaveLayerStrategy SkLuaCanvas::willSaveLayer(const SkRect* bounds, const SkPaint* paint,
michael@0:                                                        SaveFlags flags) {
michael@0:     AUTO_LUA("saveLayer");
michael@0:     if (bounds) {
michael@0:         lua.pushRect(*bounds, "bounds");
michael@0:     }
michael@0:     if (paint) {
michael@0:         lua.pushPaint(*paint, "paint");
michael@0:     }
michael@0: 
michael@0:     this->INHERITED::willSaveLayer(bounds, paint, flags);
michael@0:     // No need for a layer.
michael@0:     return kNoLayer_SaveLayerStrategy;
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::willRestore() {
michael@0:     AUTO_LUA("restore");
michael@0:     this->INHERITED::willRestore();
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::didTranslate(SkScalar dx, SkScalar dy) {
michael@0:     AUTO_LUA("translate");
michael@0:     lua.pushScalar(dx, "dx");
michael@0:     lua.pushScalar(dy, "dy");
michael@0:     this->INHERITED::didTranslate(dx, dy);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::didScale(SkScalar sx, SkScalar sy) {
michael@0:     AUTO_LUA("scale");
michael@0:     lua.pushScalar(sx, "sx");
michael@0:     lua.pushScalar(sy, "sy");
michael@0:     this->INHERITED::didScale(sx, sy);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::didRotate(SkScalar degrees) {
michael@0:     AUTO_LUA("rotate");
michael@0:     lua.pushScalar(degrees, "degrees");
michael@0:     this->INHERITED::didRotate(degrees);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::didSkew(SkScalar kx, SkScalar ky) {
michael@0:     AUTO_LUA("skew");
michael@0:     lua.pushScalar(kx, "kx");
michael@0:     lua.pushScalar(ky, "ky");
michael@0:     this->INHERITED::didSkew(kx, ky);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::didConcat(const SkMatrix& matrix) {
michael@0:     AUTO_LUA("concat");
michael@0:     this->INHERITED::didConcat(matrix);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::didSetMatrix(const SkMatrix& matrix) {
michael@0:     this->INHERITED::didSetMatrix(matrix);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::onClipRect(const SkRect& r, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
michael@0:     AUTO_LUA("clipRect");
michael@0:     lua.pushRect(r, "rect");
michael@0:     lua.pushBool(kSoft_ClipEdgeStyle == edgeStyle, "aa");
michael@0:     this->INHERITED::onClipRect(r, op, edgeStyle);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
michael@0:     AUTO_LUA("clipRRect");
michael@0:     lua.pushRRect(rrect, "rrect");
michael@0:     lua.pushBool(kSoft_ClipEdgeStyle == edgeStyle, "aa");
michael@0:     this->INHERITED::onClipRRect(rrect, op, edgeStyle);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
michael@0:     AUTO_LUA("clipPath");
michael@0:     lua.pushPath(path, "path");
michael@0:     lua.pushBool(kSoft_ClipEdgeStyle == edgeStyle, "aa");
michael@0:     this->INHERITED::onClipPath(path, op, edgeStyle);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
michael@0:     AUTO_LUA("clipRegion");
michael@0:     this->INHERITED::onClipRegion(deviceRgn, op);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawPaint(const SkPaint& paint) {
michael@0:     AUTO_LUA("drawPaint");
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawPoints(PointMode mode, size_t count,
michael@0:                                const SkPoint pts[], const SkPaint& paint) {
michael@0:     AUTO_LUA("drawPoints");
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawOval(const SkRect& rect, const SkPaint& paint) {
michael@0:     AUTO_LUA("drawOval");
michael@0:     lua.pushRect(rect, "rect");
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawRect(const SkRect& rect, const SkPaint& paint) {
michael@0:     AUTO_LUA("drawRect");
michael@0:     lua.pushRect(rect, "rect");
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawRRect(const SkRRect& rrect, const SkPaint& paint) {
michael@0:     AUTO_LUA("drawRRect");
michael@0:     lua.pushRRect(rrect, "rrect");
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner,
michael@0:                                const SkPaint& paint) {
michael@0:     AUTO_LUA("drawDRRect");
michael@0:     lua.pushRRect(outer, "outer");
michael@0:     lua.pushRRect(inner, "inner");
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawPath(const SkPath& path, const SkPaint& paint) {
michael@0:     AUTO_LUA("drawPath");
michael@0:     lua.pushPath(path, "path");
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y,
michael@0:                              const SkPaint* paint) {
michael@0:     AUTO_LUA("drawBitmap");
michael@0:     if (paint) {
michael@0:         lua.pushPaint(*paint, "paint");
michael@0:     }
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src,
michael@0:                                        const SkRect& dst, const SkPaint* paint,
michael@0:                                        DrawBitmapRectFlags flags) {
michael@0:     AUTO_LUA("drawBitmapRectToRect");
michael@0:     if (paint) {
michael@0:         lua.pushPaint(*paint, "paint");
michael@0:     }
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m,
michael@0:                                    const SkPaint* paint) {
michael@0:     AUTO_LUA("drawBitmapMatrix");
michael@0:     if (paint) {
michael@0:         lua.pushPaint(*paint, "paint");
michael@0:     }
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawSprite(const SkBitmap& bitmap, int x, int y,
michael@0:                                const SkPaint* paint) {
michael@0:     AUTO_LUA("drawSprite");
michael@0:     if (paint) {
michael@0:         lua.pushPaint(*paint, "paint");
michael@0:     }
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawText(const void* text, size_t byteLength, SkScalar x,
michael@0:                              SkScalar y, const SkPaint& paint) {
michael@0:     AUTO_LUA("drawText");
michael@0:     lua.pushEncodedText(paint.getTextEncoding(), text, byteLength);
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawPosText(const void* text, size_t byteLength,
michael@0:                                 const SkPoint pos[], const SkPaint& paint) {
michael@0:     AUTO_LUA("drawPosText");
michael@0:     lua.pushEncodedText(paint.getTextEncoding(), text, byteLength);
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawPosTextH(const void* text, size_t byteLength,
michael@0:                                  const SkScalar xpos[], SkScalar constY,
michael@0:                                  const SkPaint& paint) {
michael@0:     AUTO_LUA("drawPosTextH");
michael@0:     lua.pushEncodedText(paint.getTextEncoding(), text, byteLength);
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawTextOnPath(const void* text, size_t byteLength,
michael@0:                                    const SkPath& path, const SkMatrix* matrix,
michael@0:                                    const SkPaint& paint) {
michael@0:     AUTO_LUA("drawTextOnPath");
michael@0:     lua.pushPath(path, "path");
michael@0:     lua.pushEncodedText(paint.getTextEncoding(), text, byteLength);
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawPicture(SkPicture& picture) {
michael@0:     AUTO_LUA("drawPicture");
michael@0:     // call through so we can see the nested picture ops
michael@0:     this->INHERITED::drawPicture(picture);
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawVertices(VertexMode vmode, int vertexCount,
michael@0:                                  const SkPoint vertices[], const SkPoint texs[],
michael@0:                                  const SkColor colors[], SkXfermode* xmode,
michael@0:                                  const uint16_t indices[], int indexCount,
michael@0:                                  const SkPaint& paint) {
michael@0:     AUTO_LUA("drawVertices");
michael@0:     lua.pushPaint(paint, "paint");
michael@0: }
michael@0: 
michael@0: void SkLuaCanvas::drawData(const void* data, size_t length) {
michael@0:     AUTO_LUA("drawData");
michael@0: }