xref: /aosp_15_r20/external/skia/gm/textblobtransforms.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1*c8dee2aaSAndroid Build Coastguard Worker /*
2*c8dee2aaSAndroid Build Coastguard Worker  * Copyright 2015 Google Inc.
3*c8dee2aaSAndroid Build Coastguard Worker  *
4*c8dee2aaSAndroid Build Coastguard Worker  * Use of this source code is governed by a BSD-style license that can be
5*c8dee2aaSAndroid Build Coastguard Worker  * found in the LICENSE file.
6*c8dee2aaSAndroid Build Coastguard Worker  */
7*c8dee2aaSAndroid Build Coastguard Worker 
8*c8dee2aaSAndroid Build Coastguard Worker #include "gm/gm.h"
9*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkCanvas.h"
10*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkColor.h"
11*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkFont.h"
12*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkFontTypes.h"
13*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkPaint.h"
14*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkRect.h"
15*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkRefCnt.h"
16*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkScalar.h"
17*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkSize.h"
18*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkString.h"
19*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkTextBlob.h"
20*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkTypeface.h"
21*c8dee2aaSAndroid Build Coastguard Worker #include "tools/ToolUtils.h"
22*c8dee2aaSAndroid Build Coastguard Worker #include "tools/fonts/FontToolUtils.h"
23*c8dee2aaSAndroid Build Coastguard Worker 
24*c8dee2aaSAndroid Build Coastguard Worker #include <string.h>
25*c8dee2aaSAndroid Build Coastguard Worker 
26*c8dee2aaSAndroid Build Coastguard Worker namespace skiagm {
27*c8dee2aaSAndroid Build Coastguard Worker class TextBlobTransforms : public GM {
28*c8dee2aaSAndroid Build Coastguard Worker public:
29*c8dee2aaSAndroid Build Coastguard Worker     // This gm tests that textblobs can be translated, rotated, and scaled
TextBlobTransforms()30*c8dee2aaSAndroid Build Coastguard Worker     TextBlobTransforms() {}
31*c8dee2aaSAndroid Build Coastguard Worker 
32*c8dee2aaSAndroid Build Coastguard Worker protected:
onOnceBeforeDraw()33*c8dee2aaSAndroid Build Coastguard Worker     void onOnceBeforeDraw() override {
34*c8dee2aaSAndroid Build Coastguard Worker         SkTextBlobBuilder builder;
35*c8dee2aaSAndroid Build Coastguard Worker 
36*c8dee2aaSAndroid Build Coastguard Worker         // make textblob.  To stress distance fields, we choose sizes appropriately
37*c8dee2aaSAndroid Build Coastguard Worker         SkFont font(ToolUtils::DefaultPortableTypeface(), 162);
38*c8dee2aaSAndroid Build Coastguard Worker         font.setEdging(SkFont::Edging::kAlias);
39*c8dee2aaSAndroid Build Coastguard Worker         const char* text = "A";
40*c8dee2aaSAndroid Build Coastguard Worker 
41*c8dee2aaSAndroid Build Coastguard Worker         SkRect bounds;
42*c8dee2aaSAndroid Build Coastguard Worker         font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
43*c8dee2aaSAndroid Build Coastguard Worker         ToolUtils::add_to_text_blob(&builder, text, font, 0, 0);
44*c8dee2aaSAndroid Build Coastguard Worker 
45*c8dee2aaSAndroid Build Coastguard Worker         // Medium
46*c8dee2aaSAndroid Build Coastguard Worker         SkScalar xOffset = bounds.width() + 5;
47*c8dee2aaSAndroid Build Coastguard Worker         font.setSize(72);
48*c8dee2aaSAndroid Build Coastguard Worker         text = "B";
49*c8dee2aaSAndroid Build Coastguard Worker         ToolUtils::add_to_text_blob(&builder, text, font, xOffset, 0);
50*c8dee2aaSAndroid Build Coastguard Worker 
51*c8dee2aaSAndroid Build Coastguard Worker         font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
52*c8dee2aaSAndroid Build Coastguard Worker         SkScalar yOffset = bounds.height();
53*c8dee2aaSAndroid Build Coastguard Worker 
54*c8dee2aaSAndroid Build Coastguard Worker         // Small
55*c8dee2aaSAndroid Build Coastguard Worker         font.setSize(32);
56*c8dee2aaSAndroid Build Coastguard Worker         text = "C";
57*c8dee2aaSAndroid Build Coastguard Worker         ToolUtils::add_to_text_blob(&builder, text, font, xOffset, -yOffset - 10);
58*c8dee2aaSAndroid Build Coastguard Worker 
59*c8dee2aaSAndroid Build Coastguard Worker         // build
60*c8dee2aaSAndroid Build Coastguard Worker         fBlob = builder.make();
61*c8dee2aaSAndroid Build Coastguard Worker     }
62*c8dee2aaSAndroid Build Coastguard Worker 
getName() const63*c8dee2aaSAndroid Build Coastguard Worker     SkString getName() const override { return SkString("textblobtransforms"); }
64*c8dee2aaSAndroid Build Coastguard Worker 
getISize()65*c8dee2aaSAndroid Build Coastguard Worker     SkISize getISize() override { return SkISize::Make(kWidth, kHeight); }
66*c8dee2aaSAndroid Build Coastguard Worker 
onDraw(SkCanvas * canvas)67*c8dee2aaSAndroid Build Coastguard Worker     void onDraw(SkCanvas* canvas) override {
68*c8dee2aaSAndroid Build Coastguard Worker 
69*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawColor(SK_ColorGRAY);
70*c8dee2aaSAndroid Build Coastguard Worker 
71*c8dee2aaSAndroid Build Coastguard Worker         SkPaint paint;
72*c8dee2aaSAndroid Build Coastguard Worker 
73*c8dee2aaSAndroid Build Coastguard Worker         SkRect bounds = fBlob->bounds();
74*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(20, 20);
75*c8dee2aaSAndroid Build Coastguard Worker 
76*c8dee2aaSAndroid Build Coastguard Worker         // Colors were chosen to map to pairs of canonical colors.  The GPU Backend will cache A8
77*c8dee2aaSAndroid Build Coastguard Worker         // Texture Blobs based on the canonical color they map to.  Canonical colors are used to
78*c8dee2aaSAndroid Build Coastguard Worker         // create masks.  For A8 there are 8 of them.
79*c8dee2aaSAndroid Build Coastguard Worker         //SkColor colors[] = {SK_ColorCYAN, SK_ColorLTGRAY, SK_ColorYELLOW, SK_ColorWHITE};
80*c8dee2aaSAndroid Build Coastguard Worker 
81*c8dee2aaSAndroid Build Coastguard Worker         SkScalar xOffset = SkScalarCeilToScalar(bounds.width());
82*c8dee2aaSAndroid Build Coastguard Worker         SkScalar yOffset = SkScalarCeilToScalar(bounds.height());
83*c8dee2aaSAndroid Build Coastguard Worker         // first translate
84*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 2 * yOffset);
85*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
86*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(-xOffset, 0);
87*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
88*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(2 * xOffset, 0);
89*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
90*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(-xOffset, -yOffset);
91*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
92*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(0, 2 * yOffset);
93*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
94*c8dee2aaSAndroid Build Coastguard Worker 
95*c8dee2aaSAndroid Build Coastguard Worker         // now rotate
96*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(4 * xOffset, -yOffset);
97*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(180.f);
98*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
99*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(-180.f);
100*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(0, -yOffset);
101*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(-180.f);
102*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
103*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(270.f);
104*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
105*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(-90.f);
106*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(-xOffset, yOffset);
107*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(-90.f);
108*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
109*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(90.f);
110*c8dee2aaSAndroid Build Coastguard Worker 
111*c8dee2aaSAndroid Build Coastguard Worker         // and scales
112*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(- 3 * xOffset, 3 * yOffset);
113*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(1.5f, 1.5f);
114*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
115*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 0);
116*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(.25f, .25f);
117*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
118*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 0);
119*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(3.f, 2.f);
120*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
121*c8dee2aaSAndroid Build Coastguard Worker 
122*c8dee2aaSAndroid Build Coastguard Worker         // finally rotates, scales, and translates together
123*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 0);
124*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(23.f);
125*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(.33f, .5f);
126*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
127*c8dee2aaSAndroid Build Coastguard Worker 
128*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(-46.f);
129*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 0);
130*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(1.2f, 1.1f);
131*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
132*c8dee2aaSAndroid Build Coastguard Worker 
133*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(46.f);
134*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 0);
135*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(1.1f, 1.2f);
136*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
137*c8dee2aaSAndroid Build Coastguard Worker 
138*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(46.f);
139*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 0);
140*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(.95f, 1.1f);
141*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
142*c8dee2aaSAndroid Build Coastguard Worker 
143*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(46.f);
144*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 0);
145*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(1.3f, .7f);
146*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
147*c8dee2aaSAndroid Build Coastguard Worker 
148*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(46.f);
149*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 0);
150*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(.8f, 1.1f);
151*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
152*c8dee2aaSAndroid Build Coastguard Worker 
153*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(10.f);
154*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 0);
155*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(1.f, 5.f);
156*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
157*c8dee2aaSAndroid Build Coastguard Worker 
158*c8dee2aaSAndroid Build Coastguard Worker         canvas->rotate(5.f);
159*c8dee2aaSAndroid Build Coastguard Worker         canvas->translate(xOffset, 0);
160*c8dee2aaSAndroid Build Coastguard Worker         canvas->scale(5.f, 1.f);
161*c8dee2aaSAndroid Build Coastguard Worker         canvas->drawTextBlob(fBlob, 0, 0, paint);
162*c8dee2aaSAndroid Build Coastguard Worker     }
163*c8dee2aaSAndroid Build Coastguard Worker 
164*c8dee2aaSAndroid Build Coastguard Worker private:
165*c8dee2aaSAndroid Build Coastguard Worker     sk_sp<SkTextBlob> fBlob;
166*c8dee2aaSAndroid Build Coastguard Worker 
167*c8dee2aaSAndroid Build Coastguard Worker     inline static constexpr int kWidth = 1000;
168*c8dee2aaSAndroid Build Coastguard Worker     inline static constexpr int kHeight = 1200;
169*c8dee2aaSAndroid Build Coastguard Worker 
170*c8dee2aaSAndroid Build Coastguard Worker     using INHERITED = GM;
171*c8dee2aaSAndroid Build Coastguard Worker };
172*c8dee2aaSAndroid Build Coastguard Worker 
173*c8dee2aaSAndroid Build Coastguard Worker //////////////////////////////////////////////////////////////////////////////
174*c8dee2aaSAndroid Build Coastguard Worker 
175*c8dee2aaSAndroid Build Coastguard Worker DEF_GM(return new TextBlobTransforms;)
176*c8dee2aaSAndroid Build Coastguard Worker }  // namespace skiagm
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