aaclip.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPathBuilder.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "src/core/SkCanvasPriv.h"
#include "tools/ToolUtils.h"

Go to the source code of this file.

Classes
class	ClipCubicGM

Functions
static void	draw (SkCanvas *canvas, SkRect &target, int x, int y)
static void	draw_square (SkCanvas *canvas, int x, int y)
static void	draw_column (SkCanvas *canvas, int x, int y)
static void	draw_bar (SkCanvas *canvas, int x, int y)
static void	draw_rect_tests (SkCanvas *canvas)
	DEF_SIMPLE_GM (aaclip, canvas, 240, 120)

Function Documentation

DEF_SIMPLE_GM()

DEF_SIMPLE_GM	(	aaclip	,
		canvas	,
		240	,
		120
	)

Test a set of clipping problems discovered while writing blitAntiRect, and test all the code paths through the clipping blitters. Each region should show as a blue center surrounded by a 2px green border, with no red.

Definition at line 77 of file aaclip.cpp.

                                        {
        // Initial pixel-boundary-aligned draw
        draw_rect_tests(canvas);
 
        // Repeat 4x with .2, .4, .6, .8 px offsets
        canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
        canvas->translate(SkIntToScalar(50), 0);
        draw_rect_tests(canvas);
 
        canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
        canvas->translate(SkIntToScalar(50), 0);
        draw_rect_tests(canvas);
 
        canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
        canvas->translate(SkIntToScalar(50), 0);
        draw_rect_tests(canvas);
 
        canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
        canvas->translate(SkIntToScalar(50), 0);
        draw_rect_tests(canvas);
}

draw()

static void draw ( SkCanvas *  canvas, SkRect &  target, int  x, int  y  )

static

Draw a 2px border around the target, then red behind the target; set the clip to match the target, then draw >> the target in blue.

Definition at line 27 of file aaclip.cpp.

                                                                 {
    SkPaint borderPaint;
    borderPaint.setColor(SkColorSetRGB(0x0, 0xDD, 0x0));
    borderPaint.setAntiAlias(true);
    SkPaint backgroundPaint;
    backgroundPaint.setColor(SkColorSetRGB(0xDD, 0x0, 0x0));
    backgroundPaint.setAntiAlias(true);
    SkPaint foregroundPaint;
    foregroundPaint.setColor(SkColorSetRGB(0x0, 0x0, 0xDD));
    foregroundPaint.setAntiAlias(true);
 
    canvas->save();
    canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
    target.inset(SkIntToScalar(-2), SkIntToScalar(-2));
    canvas->drawRect(target, borderPaint);
    target.inset(SkIntToScalar(2), SkIntToScalar(2));
    canvas->drawRect(target, backgroundPaint);
    canvas->clipRect(target, true);
    target.inset(SkIntToScalar(-4), SkIntToScalar(-4));
    canvas->drawRect(target, foregroundPaint);
    canvas->restore();
}

draw_bar()

static void draw_bar ( SkCanvas *  canvas, int  x, int  y  )

static

Definition at line 60 of file aaclip.cpp.

                                                     {
    SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 1 * SK_Scalar1));
    draw(canvas, target, x, y);
}

draw_column()

static void draw_column ( SkCanvas *  canvas, int  x, int  y  )

static

Definition at line 55 of file aaclip.cpp.

                                                        {
    SkRect target (SkRect::MakeWH(1 * SK_Scalar1, 10 * SK_Scalar1));
    draw(canvas, target, x, y);
}

draw_rect_tests()

static void draw_rect_tests ( SkCanvas *  canvas )

static

Definition at line 65 of file aaclip.cpp.

                                              {
    draw_square(canvas, 10, 10);
    draw_column(canvas, 30, 10);
    draw_bar(canvas, 10, 30);
}

draw_square()

static void draw_square ( SkCanvas *  canvas, int  x, int  y  )

static

Definition at line 50 of file aaclip.cpp.

                                                        {
    SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 10 * SK_Scalar1));
    draw(canvas, target, x, y);
}