1 /*
2 * Copyright 2024 Google LLC
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 "tools/gpu/ganesh/AtlasTextOpTools.h"
9
10 #include "include/core/SkFont.h"
11 #include "include/core/SkMatrix.h"
12 #include "include/core/SkPaint.h"
13 #include "src/core/SkScalerContext.h"
14 #include "src/core/SkStrikeCache.h"
15 #include "src/gpu/ganesh/GrRecordingContextPriv.h"
16 #include "src/gpu/ganesh/SurfaceDrawContext.h"
17 #include "src/text/GlyphRun.h"
18 #include "src/text/gpu/TextBlob.h"
19 #include "tools/text/gpu/TextBlobTools.h"
20
21 #if defined(GR_TEST_UTILS)
22 #include "src/base/SkRandom.h"
23 #include "src/gpu/ganesh/GrDrawOpTest.h"
24 #endif
25
26 namespace skgpu::ganesh {
27
CreateOp(skgpu::ganesh::SurfaceDrawContext * sdc,const SkPaint & skPaint,const SkFont & font,const SkMatrix & ctm,const char * text,int x,int y)28 GrOp::Owner AtlasTextOpTools::CreateOp(skgpu::ganesh::SurfaceDrawContext* sdc,
29 const SkPaint& skPaint,
30 const SkFont& font,
31 const SkMatrix& ctm,
32 const char* text,
33 int x,
34 int y) {
35 size_t textLen = (int)strlen(text);
36
37 SkMatrix drawMatrix = ctm;
38 drawMatrix.preTranslate(x, y);
39 auto drawOrigin = SkPoint::Make(x, y);
40 sktext::GlyphRunBuilder builder;
41 auto glyphRunList = builder.textToGlyphRunList(font, skPaint, text, textLen, drawOrigin);
42 if (glyphRunList.empty()) {
43 return nullptr;
44 }
45
46 auto rContext = sdc->recordingContext();
47 sktext::gpu::SDFTControl control =
48 rContext->priv().getSDFTControl(sdc->surfaceProps().isUseDeviceIndependentFonts());
49
50 SkStrikeDeviceInfo strikeDeviceInfo{
51 sdc->surfaceProps(), SkScalerContextFlags::kBoostContrast, &control};
52
53 sk_sp<sktext::gpu::TextBlob> blob =
54 sktext::gpu::TextBlob::Make(glyphRunList,
55 skPaint,
56 drawMatrix,
57 strikeDeviceInfo,
58 SkStrikeCache::GlobalStrikeCache());
59
60 const sktext::gpu::AtlasSubRun* subRun = sktext::gpu::TextBlobTools::FirstSubRun(blob.get());
61 if (!subRun) {
62 return nullptr;
63 }
64
65 GrOp::Owner op;
66 std::tie(std::ignore, op) =
67 subRun->makeAtlasTextOp(nullptr, ctm, glyphRunList.origin(), skPaint, blob, sdc);
68 return op;
69 }
70
71 } // namespace skgpu::ganesh
72
73 #if defined(GR_TEST_UTILS)
GR_DRAW_OP_TEST_DEFINE(AtlasTextOp)74 GR_DRAW_OP_TEST_DEFINE(AtlasTextOp) {
75 SkMatrix ctm = GrTest::TestMatrixInvertible(random);
76
77 SkPaint skPaint;
78 skPaint.setColor(random->nextU());
79
80 SkFont font;
81 if (random->nextBool()) {
82 font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
83 } else {
84 font.setEdging(random->nextBool() ? SkFont::Edging::kAntiAlias : SkFont::Edging::kAlias);
85 }
86 font.setSubpixel(random->nextBool());
87
88 const char* text = "The quick brown fox jumps over the lazy dog.";
89
90 // create some random x/y offsets, including negative offsets
91 static const int kMaxTrans = 1024;
92 int xPos = (random->nextU() % 2) * 2 - 1;
93 int yPos = (random->nextU() % 2) * 2 - 1;
94 int xInt = (random->nextU() % kMaxTrans) * xPos;
95 int yInt = (random->nextU() % kMaxTrans) * yPos;
96
97 return skgpu::ganesh::AtlasTextOpTools::CreateOp(sdc, skPaint, font, ctm, text, xInt, yInt);
98 }
99 #endif
100