chromium/third_party/skia/src/pdf/SkPDFShader.cpp

/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "src/pdf/SkPDFShader.h"

#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkSamplingOptions.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkStream.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTileMode.h"
#include "include/private/base/SkTPin.h"
#include "src/core/SkDevice.h"
#include "src/core/SkTHash.h"
#include "src/pdf/SkKeyedImage.h"
#include "src/pdf/SkPDFDevice.h"
#include "src/pdf/SkPDFDocumentPriv.h"
#include "src/pdf/SkPDFGradientShader.h"
#include "src/pdf/SkPDFUtils.h"
#include "src/shaders/SkShaderBase.h"

#include <memory>
#include <utility>

static void draw(SkCanvas* canvas, const SkImage* image, SkColor4f paintColor) { … }

static SkBitmap to_bitmap(const SkImage* image) { … }

static void draw_matrix(SkCanvas* canvas, const SkImage* image,
                        const SkMatrix& matrix, SkColor4f paintColor) { … }

static void draw_bitmap_matrix(SkCanvas* canvas, const SkBitmap& bm,
                               const SkMatrix& matrix, SkColor4f paintColor) { … }

static void fill_color_from_bitmap(SkCanvas* canvas,
                                   float left, float top, float right, float bottom,
                                   const SkBitmap& bitmap, int x, int y, float alpha) { … }

static SkMatrix scale_translate(SkScalar sx, SkScalar sy, SkScalar tx, SkScalar ty) { … }

static bool is_tiled(SkTileMode m) { … }

static SkPDFIndirectReference make_image_shader(SkPDFDocument* doc,
                                                SkMatrix finalMatrix,
                                                SkTileMode tileModesX,
                                                SkTileMode tileModesY,
                                                SkRect bBox,
                                                const SkImage* image,
                                                SkColor4f paintColor) { … }

// Generic fallback for unsupported shaders:
//  * allocate a surfaceBBox-sized bitmap
//  * shade the whole area
//  * use the result as a bitmap shader
static SkPDFIndirectReference make_fallback_shader(SkPDFDocument* doc,
                                                   SkShader* shader,
                                                   const SkMatrix& canvasTransform,
                                                   const SkIRect& surfaceBBox,
                                                   SkColor4f paintColor) { … }

static SkColor4f adjust_color(SkShader* shader, SkColor4f paintColor) { … }

SkPDFIndirectReference SkPDFMakeShader(SkPDFDocument* doc,
                                       SkShader* shader,
                                       const SkMatrix& canvasTransform,
                                       const SkIRect& surfaceBBox,
                                       SkColor4f paintColor) { … }