blob: deb7f4746a97b1ad2655de71558b85407f7fa43f [file] [log] [blame]
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRRect.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypeface.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"
#include <string.h>
static void rotated_checkerboard_shader(SkPaint* paint,
SkColor c1,
SkColor c2,
int size) {
SkBitmap bm;
bm.allocN32Pixels(2 * size, 2 * size);
bm.eraseColor(c1);
bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2);
bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2);
SkMatrix matrix;
matrix.setScale(0.75f, 0.75f);
matrix.preRotate(30.0f);
paint->setShader(bm.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
SkSamplingOptions(), matrix));
}
static void exercise_draw_pos_text(SkCanvas* canvas,
const char* text,
SkScalar x, SkScalar y,
const SkFont& font, const SkPaint& paint) {
const int count = font.countText(text, strlen(text), SkTextEncoding::kUTF8);
SkTextBlobBuilder builder;
auto rec = builder.allocRunPos(font, count);
font.textToGlyphs(text, strlen(text), SkTextEncoding::kUTF8, rec.glyphs, count);
font.getPos(rec.glyphs, count, rec.points(), {x, y});
canvas->drawTextBlob(builder.make(), 0, 0, paint);
}
static void exercise_draw_pos_text_h(SkCanvas* canvas,
const char* text,
SkScalar x, SkScalar y,
const SkFont& font, const SkPaint& paint) {
const int count = font.countText(text, strlen(text), SkTextEncoding::kUTF8);
SkTextBlobBuilder builder;
auto rec = builder.allocRunPosH(font, count, 0);
font.textToGlyphs(text, strlen(text), SkTextEncoding::kUTF8, rec.glyphs, count);
font.getXPos(rec.glyphs, count, rec.pos);
canvas->drawTextBlob(builder.make(), x, y, paint);
}
static void test_text(SkCanvas* canvas, SkScalar size,
SkColor color, SkScalar Y) {
SkFont font(ToolUtils::DefaultPortableTypeface(), 24);
font.setEdging(SkFont::Edging::kAlias);
SkPaint type;
type.setColor(color);
const char text[] = "HELLO WORLD";
canvas->drawSimpleText(text, strlen(text), SkTextEncoding::kUTF8, 32, size / 2 + Y,
font, type);
SkScalar lineSpacing = font.getSpacing();
exercise_draw_pos_text(canvas, text, 32, size / 2 + Y + lineSpacing, font, type);
exercise_draw_pos_text_h(canvas, text, 32,
size / 2 + Y + 2 * lineSpacing, font, type);
}
// If this GM works correctly, the cyan layer should be lined up with
// the objects below it.
DEF_SIMPLE_GM(skbug_257, canvas, 512, 512) {
const SkScalar size = 256;
SkAutoCanvasRestore autoCanvasRestore0(canvas, true);
const SkScalar scale = 1.00168f;
canvas->scale(scale, scale);
{
SkPaint checker;
rotated_checkerboard_shader(&checker, SK_ColorWHITE, SK_ColorBLACK, 16);
checker.setAntiAlias(true);
SkAutoCanvasRestore autoCanvasRestore(canvas, true);
canvas->clear(0xFFCECFCE);
SkScalar translate = 225364.0f;
canvas->translate(0, -translate);
// Test rects
SkRect rect = SkRect::MakeLTRB(8, 8 + translate, size - 8,
size - 8 + translate);
canvas->drawRect(rect, checker);
// Test Paths
canvas->translate(size, 0);
SkRRect rrect;
SkVector radii[4] = {{40, 40}, {40, 40}, {40, 40}, {40, 40}};
rrect.setRectRadii(rect, radii);
canvas->drawRRect(rrect, checker);
// Test Points
canvas->translate(-size, size);
SkScalar delta = 1.0 / 64.0;
SkPoint points[8] = {{size / 2, 8 + translate},
{size / 2, 8 + translate + delta},
{8, size / 2 + translate},
{8, size / 2 + translate + delta},
{size / 2, size - 8 + translate},
{size / 2, size - 8 + translate + delta},
{size - 8, size / 2 + translate},
{size - 8, size / 2 + translate + delta}};
checker.setStyle(SkPaint::kStroke_Style);
checker.setStrokeWidth(8);
checker.setStrokeCap(SkPaint::kRound_Cap);
canvas->drawPoints(SkCanvas::kLines_PointMode, 8, points, checker);
// Test Text
canvas->translate(size, 0);
test_text(canvas, size, SK_ColorBLACK, translate);
}
// reference points (without the huge translations).
SkPaint stroke;
stroke.setStyle(SkPaint::kStroke_Style);
stroke.setStrokeWidth(5);
stroke.setColor(SK_ColorCYAN);
canvas->drawCircle(size / 2, size / 2, size / 2 - 10, stroke);
canvas->drawCircle(3 * size / 2, size / 2, size / 2 - 10, stroke);
canvas->drawCircle(size / 2, 384, size / 2 - 10, stroke);
canvas->translate(size, size);
test_text(canvas, size, SK_ColorCYAN, 0.0f);
}