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nine_patch_converter.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #pragma once
6
7 #include <memory>
8
9 #include "flutter/fml/macros.h"
10 #include "impeller/aiks/canvas.h"
11 #include "impeller/aiks/image.h"
12 #include "impeller/aiks/paint.h"
13 #include "impeller/core/sampler_descriptor.h"
14 #include "impeller/geometry/path.h"
15
16 namespace impeller {
17
18 // Converts a call to draw a nine patch image into a draw atlas call.
19 class NinePatchConverter {
20 public:
21 NinePatchConverter();
22
23 ~NinePatchConverter();
24
25 void DrawNinePatch(const std::shared_ptr<Image>& image,
26 Rect center,
27 Rect dst,
28 const SamplerDescriptor& sampler,
29 Canvas* canvas,
30 Paint* paint);
31
32 private:
33 // Return a list of slice coordinates based on the size of the nine-slice
34 // parameters in one dimension. Each set of slice coordinates contains a
35 // begin/end pair for each of the source (image) and dest (screen) in the
36 // order (src0, dst0, src1, dst1). The area from src0 => src1 of the image is
37 // painted on the screen from dst0 => dst1 The slices for each dimension are
38 // generated independently.
39 std::vector<double> InitSlices(double img0,
40 double imgC0,
41 double imgC1,
42 double img1,
43 double dst0,
44 double dst1);
45 };
46
47 } // namespace impeller
path.h
impeller::Paint
Definition: paint.h:25
impeller::Canvas
Definition: canvas.h:50
impeller::NinePatchConverter::DrawNinePatch
void DrawNinePatch(const std::shared_ptr< Image > &image, Rect center, Rect dst, const SamplerDescriptor &sampler, Canvas *canvas, Paint *paint)
Definition: nine_patch_converter.cc:60
impeller::NinePatchConverter::~NinePatchConverter
~NinePatchConverter()
impeller::SamplerDescriptor
Definition: sampler_descriptor.h:18
canvas.h
impeller::NinePatchConverter
Definition: nine_patch_converter.h:19
impeller::NinePatchConverter::NinePatchConverter
NinePatchConverter()
sampler_descriptor.h
image.h
paint.h
impeller
Definition: aiks_context.cc:10
impeller::TRect< Scalar >