1 /* 2 * Copyright 2011 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 9 #ifndef SkPDFShader_DEFINED 10 #define SkPDFShader_DEFINED 11 12 #include "SkBitmapKey.h" 13 #include "SkMacros.h" 14 #include "SkPDFTypes.h" 15 #include "SkShader.h" 16 17 18 class SkPDFDocument; 19 class SkMatrix; 20 struct SkIRect; 21 22 /** Make a PDF shader for the passed SkShader. If the SkShader is invalid in 23 * some way, returns nullptr. 24 * 25 * In PDF parlance, this is a pattern, used in place of a color when the 26 * pattern color space is selected. 27 * 28 * May cache the shader in the document for later re-use. If this function is 29 * called again with an equivalent shader, a new reference to the cached pdf 30 * shader may be returned. 31 * 32 * @param doc The parent document, must be non-null. 33 * @param shader The SkShader to emulate. 34 * @param ctm The current transform matrix. (PDF shaders are absolutely 35 * positioned, relative to where the page is drawn.) 36 * @param surfaceBBox The bounding box of the drawing surface (with matrix 37 * already applied). 38 * @param paintColor Color+Alpha of the paint. Color is usually ignored, 39 * unless it is a alpha shader. 40 */ 41 SkPDFIndirectReference SkPDFMakeShader(SkPDFDocument* doc, 42 SkShader* shader, 43 const SkMatrix& ctm, 44 const SkIRect& surfaceBBox, 45 SkColor paintColor); 46 47 SK_BEGIN_REQUIRE_DENSE 48 struct SkPDFImageShaderKey { 49 SkMatrix fCanvasTransform; 50 SkMatrix fShaderTransform; 51 SkIRect fBBox; 52 SkBitmapKey fBitmapKey; 53 SkShader::TileMode fImageTileModes[2]; 54 SkColor fPaintColor; 55 }; 56 SK_END_REQUIRE_DENSE 57 58 inline bool operator==(const SkPDFImageShaderKey& a, const SkPDFImageShaderKey& b) { 59 SkASSERT(a.fBitmapKey.fID != 0); 60 SkASSERT(b.fBitmapKey.fID != 0); 61 return a.fCanvasTransform == b.fCanvasTransform 62 && a.fShaderTransform == b.fShaderTransform 63 && a.fBBox == b.fBBox 64 && a.fBitmapKey == b.fBitmapKey 65 && a.fImageTileModes[0] == b.fImageTileModes[0] 66 && a.fImageTileModes[1] == b.fImageTileModes[1] 67 && a.fPaintColor == b.fPaintColor; 68 } 69 #endif 70