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// Copyright (c) 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_SKIA_PAINT_UTIL_H_
#define UI_GFX_SKIA_PAINT_UTIL_H_
#include <memory>
#include <vector>
#include "cc/paint/paint_shader.h"
#include "ui/gfx/gfx_export.h"
#include "ui/gfx/shadow_value.h"
class SkDrawLooper;
class SkMatrix;
namespace gfx {
class ImageSkiaRep;
// Creates a bitmap shader for the image rep with the image rep's scale factor.
// Sets the created shader's local matrix such that it displays the image rep at
// the correct scale factor.
// The shader's local matrix should not be changed after the shader is created.
// TODO(pkotwicz): Allow shader's local matrix to be changed after the shader
// is created.
//
GFX_EXPORT sk_sp<cc::PaintShader> CreateImageRepShader(
const gfx::ImageSkiaRep& image_rep,
SkShader::TileMode tile_mode_x,
SkShader::TileMode tile_mode_y,
const SkMatrix& local_matrix);
// Creates a bitmap shader for the image rep with the passed in scale factor.
GFX_EXPORT sk_sp<cc::PaintShader> CreateImageRepShaderForScale(
const gfx::ImageSkiaRep& image_rep,
SkShader::TileMode tile_mode_x,
SkShader::TileMode tile_mode_y,
const SkMatrix& local_matrix,
SkScalar scale);
// Creates a vertical gradient shader. The caller owns the shader.
// Example usage to avoid leaks:
GFX_EXPORT sk_sp<cc::PaintShader> CreateGradientShader(int start_point,
int end_point,
SkColor start_color,
SkColor end_color);
// Creates a draw looper to generate |shadows|. The caller owns the draw looper.
// NULL is returned if |shadows| is empty since no draw looper is needed in
// this case.
GFX_EXPORT sk_sp<SkDrawLooper> CreateShadowDrawLooper(
const std::vector<ShadowValue>& shadows);
} // namespace gfx
#endif // UI_GFX_SKIA_UTIL_H_
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