imageresizetiled.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkFont.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkImageFilters.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"

Go to the source code of this file.

Macros
#define	WIDTH   640
#define	HEIGHT   480
#define	RESIZE_FACTOR   SkIntToScalar(2)

Functions
	DEF_SIMPLE_GM (imageresizetiled, canvas, WIDTH, HEIGHT)

Macro Definition Documentation

HEIGHT

#define HEIGHT   480

Definition at line 23 of file imageresizetiled.cpp.

RESIZE_FACTOR

#define RESIZE_FACTOR   SkIntToScalar(2)

Definition at line 25 of file imageresizetiled.cpp.

WIDTH

#define WIDTH   640

Definition at line 22 of file imageresizetiled.cpp.

Function Documentation

DEF_SIMPLE_GM()

DEF_SIMPLE_GM	(	imageresizetiled	,
		canvas	,
		WIDTH	,
		HEIGHT
	)

Definition at line 27 of file imageresizetiled.cpp.

                                                       {
        SkPaint paint;
        SkMatrix matrix;
        matrix.setScale(RESIZE_FACTOR, RESIZE_FACTOR);
        paint.setImageFilter(SkImageFilters::MatrixTransform(matrix,
                                                             SkSamplingOptions(),
                                                             nullptr));
 
        SkFont         font(ToolUtils::DefaultPortableTypeface(), 100);
        const SkScalar tile_size = SkIntToScalar(100);
        for (SkScalar y = 0; y < HEIGHT; y += tile_size) {
            for (SkScalar x = 0; x < WIDTH; x += tile_size) {
                canvas->save();
                canvas->clipRect(SkRect::MakeXYWH(x, y, tile_size, tile_size));
                canvas->scale(SkScalarInvert(RESIZE_FACTOR),
                              SkScalarInvert(RESIZE_FACTOR));
                canvas->saveLayer(nullptr, &paint);
                const char* str[] = {
                    "The quick",
                    "brown fox",
                    "jumped over",
                    "the lazy dog.",
                };
                float posY = 0;
                for (unsigned i = 0; i < std::size(str); i++) {
                    posY += 100.0f;
                    canvas->drawString(str[i], 0.0f, posY, font, SkPaint());
                }
                canvas->restore();
                canvas->restore();
            }
        }
}