1/*
2 * Copyright 2013 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#ifndef GrBitmapTextGeoProc_DEFINED
9#define GrBitmapTextGeoProc_DEFINED
10
11#include "src/core/SkArenaAlloc.h"
12#include "src/gpu/GrGeometryProcessor.h"
13#include "src/gpu/GrProcessor.h"
14
15class GrGLBitmapTextGeoProc;
16class GrInvariantOutput;
17class GrSurfaceProxyView;
18
19/**
20 * The output color of this effect is a modulation of the input color and a sample from a texture.
21 * It allows explicit specification of the filtering and wrap modes (GrSamplerState). The input
22 * coords are a custom attribute.
23 */
24class GrBitmapTextGeoProc : public GrGeometryProcessor {
25public:
26#ifdef SK_ENABLE_SMALL_PAGE
27    inline static constexpr int kMaxTextures = 16;
28#else
29    inline static constexpr int kMaxTextures = 4;
30#endif
31
32    static GrGeometryProcessor* Make(SkArenaAlloc* arena,
33                                     const GrShaderCaps& caps,
34                                     const SkPMColor4f& color,
35                                     bool wideColor,
36                                     const GrSurfaceProxyView* views,
37                                     int numActiveViews,
38                                     GrSamplerState p,
39                                     GrMaskFormat format,
40                                     const SkMatrix& localMatrix,
41                                     bool usesW) {
42        return arena->make([&](void* ptr) {
43            return new (ptr) GrBitmapTextGeoProc(caps, color, wideColor, views, numActiveViews,
44                                                 p, format, localMatrix, usesW);
45        });
46    }
47
48    ~GrBitmapTextGeoProc() override {}
49
50    const char* name() const override { return "BitmapText"; }
51
52    SkString getShaderDfxInfo() const override;
53
54    void addNewViews(const GrSurfaceProxyView*, int numActiveViews, GrSamplerState);
55
56    void addToKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b) const override;
57
58    std::unique_ptr<ProgramImpl> makeProgramImpl(const GrShaderCaps& caps) const override;
59
60private:
61    class Impl;
62
63    GrBitmapTextGeoProc(const GrShaderCaps&, const SkPMColor4f&, bool wideColor,
64                        const GrSurfaceProxyView* views, int numViews, GrSamplerState params,
65                        GrMaskFormat format, const SkMatrix& localMatrix, bool usesW);
66
67    bool hasVertexColor() const { return fInColor.isInitialized(); }
68
69    const TextureSampler& onTextureSampler(int i) const override { return fTextureSamplers[i]; }
70
71    SkPMColor4f      fColor;
72    SkMatrix         fLocalMatrix;
73    bool             fUsesW;
74    SkISize          fAtlasDimensions;  // dimensions for all textures used with fTextureSamplers[].
75    TextureSampler   fTextureSamplers[kMaxTextures];
76    Attribute        fInPosition;
77    Attribute        fInColor;
78    Attribute        fInTextureCoords;
79    GrMaskFormat     fMaskFormat;
80
81    GR_DECLARE_GEOMETRY_PROCESSOR_TEST
82
83    using INHERITED = GrGeometryProcessor;
84};
85
86#endif
87