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(GPU_TEST_UTILS)
22 #include "src/base/SkRandom.h"
23 #include "src/gpu/ganesh/GrDrawOpTest.h"
24 #include "src/gpu/ganesh/GrTestUtils.h"
25 #endif
26
27 namespace skgpu::ganesh {
28
CreateOp(skgpu::ganesh::SurfaceDrawContext * sdc,const SkPaint & skPaint,const SkFont & font,const SkMatrix & ctm,const char * text,int x,int y)29 GrOp::Owner AtlasTextOpTools::CreateOp(skgpu::ganesh::SurfaceDrawContext* sdc,
30 const SkPaint& skPaint,
31 const SkFont& font,
32 const SkMatrix& ctm,
33 const char* text,
34 int x,
35 int y) {
36 size_t textLen = (int)strlen(text);
37
38 SkMatrix drawMatrix = ctm;
39 drawMatrix.preTranslate(x, y);
40 auto drawOrigin = SkPoint::Make(x, y);
41 sktext::GlyphRunBuilder builder;
42 auto glyphRunList = builder.textToGlyphRunList(font, skPaint, text, textLen, drawOrigin);
43 if (glyphRunList.empty()) {
44 return nullptr;
45 }
46
47 auto rContext = sdc->recordingContext();
48 sktext::gpu::SubRunControl control =
49 rContext->priv().getSubRunControl(sdc->surfaceProps().isUseDeviceIndependentFonts());
50
51 SkStrikeDeviceInfo strikeDeviceInfo{
52 sdc->surfaceProps(), SkScalerContextFlags::kBoostContrast, &control};
53
54 sk_sp<sktext::gpu::TextBlob> blob =
55 sktext::gpu::TextBlob::Make(glyphRunList,
56 skPaint,
57 drawMatrix,
58 strikeDeviceInfo,
59 SkStrikeCache::GlobalStrikeCache());
60
61 const sktext::gpu::AtlasSubRun* subRun = sktext::gpu::TextBlobTools::FirstSubRun(blob.get());
62 if (!subRun) {
63 return nullptr;
64 }
65
66 GrOp::Owner op;
67 std::tie(std::ignore, op) =
68 subRun->makeAtlasTextOp(nullptr, ctm, glyphRunList.origin(), skPaint, blob, sdc);
69 return op;
70 }
71
72 } // namespace skgpu::ganesh
73
74 #if defined(GPU_TEST_UTILS)
GR_DRAW_OP_TEST_DEFINE(AtlasTextOp)75 GR_DRAW_OP_TEST_DEFINE(AtlasTextOp) {
76 SkMatrix ctm = GrTest::TestMatrixInvertible(random);
77
78 SkPaint skPaint;
79 skPaint.setColor(random->nextU());
80
81 SkFont font;
82 if (random->nextBool()) {
83 font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
84 } else {
85 font.setEdging(random->nextBool() ? SkFont::Edging::kAntiAlias : SkFont::Edging::kAlias);
86 }
87 font.setSubpixel(random->nextBool());
88
89 const char* text = "The quick brown fox jumps over the lazy dog.";
90
91 // create some random x/y offsets, including negative offsets
92 static const int kMaxTrans = 1024;
93 int xPos = (random->nextU() % 2) * 2 - 1;
94 int yPos = (random->nextU() % 2) * 2 - 1;
95 int xInt = (random->nextU() % kMaxTrans) * xPos;
96 int yInt = (random->nextU() % kMaxTrans) * yPos;
97
98 return skgpu::ganesh::AtlasTextOpTools::CreateOp(sdc, skPaint, font, ctm, text, xInt, yInt);
99 }
100 #endif
101