crbug_1162942.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkRect.h"
#include "src/base/SkFloatBits.h"

Go to the source code of this file.

Functions
	DEF_SIMPLE_GM (crbug_1162942, canvas, 620, 200)

Function Documentation

DEF_SIMPLE_GM()

DEF_SIMPLE_GM	(	crbug_1162942	,
		canvas	,
		620	,
		200
	)

Definition at line 24 of file crbug_1162942.cpp.

                                               {
    // Matrix and quad values taken from Chrome repro scenario.
    SkMatrix ctm = SkMatrix::MakeAll(
            SkBits2Float(0x3FCC7F75), SkBits2Float(0x3D5784FC), SkBits2Float(0x44C48C99),
            SkBits2Float(0x3F699F7F), SkBits2Float(0x3E0A0D37), SkBits2Float(0x43908518),
            SkBits2Float(0x3AA17423), SkBits2Float(0x3A6CCDC3), SkBits2Float(0x3F2EFEEC));
    ctm.postTranslate(-1500.f, -325.f);
 
    SkPoint pts[4] = {{SkBits2Float(0x3F39778B), SkBits2Float(0x43FF7FFC)},
                      {SkBits2Float(0x0), SkBits2Float(0x43FF7FFA)},
                      {SkBits2Float(0xB83B055E), SkBits2Float(0x42500003)},
                      {SkBits2Float(0x3F39776F), SkBits2Float(0x4250000D)}};
    SkRect bounds;
    bounds.setBounds(pts, 4);
 
    canvas->clear(SK_ColorWHITE);
 
    SkCanvas::QuadAAFlags flags[] = {
            (SkCanvas::QuadAAFlags) (SkCanvas::kTop_QuadAAFlag    | SkCanvas::kLeft_QuadAAFlag ),
            (SkCanvas::QuadAAFlags) (SkCanvas::kBottom_QuadAAFlag | SkCanvas::kRight_QuadAAFlag),
            (SkCanvas::QuadAAFlags) (SkCanvas::kBottom_QuadAAFlag),
            (SkCanvas::QuadAAFlags) (SkCanvas::kRight_QuadAAFlag),
            (SkCanvas::QuadAAFlags) (SkCanvas::kRight_QuadAAFlag  | SkCanvas::kLeft_QuadAAFlag),
            (SkCanvas::QuadAAFlags) (SkCanvas::kTop_QuadAAFlag    | SkCanvas::kBottom_QuadAAFlag),
    };
 
    SkColor color = SK_ColorGREEN;
    for (auto aaFlags : flags) {
        canvas->save();
        canvas->concat(ctm);
        canvas->experimental_DrawEdgeAAQuad(bounds, pts, aaFlags, color, SkBlendMode::kSrcOver);
        SkColor rgb = color & 0x00FFFFFF;
        color = 0xFF000000 | (rgb << 4) | (rgb >> 20);
        canvas->restore();
        canvas->translate(0, 25);
    }
}