1 /*
2  * Copyright 2017 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 #include "GrColor.h"
9 #include "GrRenderTargetContext.h"
10 #include "GrSamplerState.h"
11 #include "GrTypesPriv.h"
12 #include "SkCanvas.h"
13 #include "SkRefCnt.h"
14 
15 class GrColorSpaceXform;
16 class GrDrawOp;
17 class GrTextureProxy;
18 struct SkRect;
19 class SkMatrix;
20 
21 namespace GrTextureOp {
22 
23 /**
24  * Creates an op that draws a sub-rectangle of a texture. The passed color is modulated by the
25  * texture's color. 'srcRect' specifies the rectangle of the texture to draw. 'dstRect' specifies
26  * the rectangle to draw in local coords which will be transformed by 'viewMatrix' to be in device
27  * space. 'viewMatrix' must be affine. If GrAAType is kCoverage then AA is applied to the edges
28  * indicated by GrQuadAAFlags. Otherwise, GrQuadAAFlags is ignored.
29  */
30 std::unique_ptr<GrDrawOp> Make(GrContext*,
31                                sk_sp<GrTextureProxy>,
32                                GrSamplerState::Filter,
33                                const SkPMColor4f&,
34                                const SkRect& srcRect,
35                                const SkRect& dstRect,
36                                GrAAType,
37                                GrQuadAAFlags,
38                                SkCanvas::SrcRectConstraint,
39                                const SkMatrix& viewMatrix,
40                                sk_sp<GrColorSpaceXform> textureXform);
41 
42 std::unique_ptr<GrDrawOp> Make(GrContext*,
43                                const GrRenderTargetContext::TextureSetEntry[],
44                                int cnt,
45                                GrSamplerState::Filter,
46                                GrAAType,
47                                const SkMatrix& viewMatrix,
48                                sk_sp<GrColorSpaceXform> textureXform);
49 
50 /**
51  * Returns true if bilerp texture filtering matters when rendering the src rect
52  * texels to dst rect, with the given view matrix.
53  */
54 bool GetFilterHasEffect(const SkMatrix& viewMatrix, const SkRect& srcRect, const SkRect& dstRect);
55 
56 }
57