DrawBitmapRectTest.cpp File Reference

#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkImage.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkRect.h"
#include "include/core/SkSamplingOptions.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypes.h"
#include "src/base/SkRandom.h"
#include "src/core/SkMatrixUtils.h"
#include "tests/Test.h"
#include <array>
#include <cstddef>
#include <cstdint>

Go to the source code of this file.

Functions
static void	rand_matrix (SkMatrix *mat, SkRandom &rand, unsigned mask)
static void	rand_size (SkISize *size, SkRandom &rand)
static void	test_treatAsSprite (skiatest::Reporter *reporter)
static void	test_wacky_bitmapshader (skiatest::Reporter *reporter, int width, int height)
static void	test_giantrepeat_crbug118018 (skiatest::Reporter *reporter)
static void	test_nan_antihair ()
static bool	check_for_all_zeros (const SkBitmap &bm)
static void	create (SkBitmap *bm, SkColor color)
	DEF_TEST (DrawBitmapRect, reporter)

Variables
static const int	gWidth = 256
static const int	gHeight = 256

Function Documentation

check_for_all_zeros()

static bool check_for_all_zeros ( const SkBitmap &  bm )

static

Definition at line 223 of file DrawBitmapRectTest.cpp.

                                                    {
    size_t count = bm.width() * bm.bytesPerPixel();
    for (int y = 0; y < bm.height(); y++) {
        const uint8_t* ptr = reinterpret_cast<const uint8_t*>(bm.getAddr(0, y));
        for (size_t i = 0; i < count; i++) {
            if (ptr[i]) {
                return false;
            }
        }
    }
    return true;
}

create()

static void create ( SkBitmap *  bm, SkColor  color  )

static

Definition at line 239 of file DrawBitmapRectTest.cpp.

                                                {
    bm->allocN32Pixels(gWidth, gHeight);
    bm->eraseColor(color);
}

DEF_TEST()

DEF_TEST	(	DrawBitmapRect	,
		reporter
	)

Definition at line 244 of file DrawBitmapRectTest.cpp.

                                   {
    SkBitmap src, dst;
 
    create(&src, 0xFFFFFFFF);
    create(&dst, 0);
 
    SkCanvas canvas(dst);
 
    SkRect srcR = { gWidth, 0, gWidth + 16, 16 };
    SkRect dstR = { 0, 0, 16, 16 };
 
    canvas.drawImageRect(src.asImage(), srcR, dstR, SkSamplingOptions(), nullptr,
                         SkCanvas::kStrict_SrcRectConstraint);
 
    // ensure that we draw nothing if srcR does not intersect the bitmap
    REPORTER_ASSERT(reporter, check_for_all_zeros(dst));
 
    test_nan_antihair();
    test_giantrepeat_crbug118018(reporter);
 
    test_treatAsSprite(reporter);
}

rand_matrix()

static void rand_matrix ( SkMatrix *  mat, SkRandom &  rand, unsigned  mask  )

static

Definition at line 32 of file DrawBitmapRectTest.cpp.

                                                                      {
    mat->setIdentity();
    if (mask & SkMatrix::kTranslate_Mask) {
        mat->postTranslate(rand.nextSScalar1(), rand.nextSScalar1());
    }
    if (mask & SkMatrix::kScale_Mask) {
        mat->postScale(rand.nextSScalar1(), rand.nextSScalar1());
    }
    if (mask & SkMatrix::kAffine_Mask) {
        mat->postRotate(rand.nextSScalar1() * 360);
    }
    if (mask & SkMatrix::kPerspective_Mask) {
        mat->setPerspX(rand.nextSScalar1());
        mat->setPerspY(rand.nextSScalar1());
    }
}

rand_size()

static void rand_size ( SkISize *  size, SkRandom &  rand  )

static

Definition at line 49 of file DrawBitmapRectTest.cpp.

                                                     {
    size->set(rand.nextU() & 0xFFFF, rand.nextU() & 0xFFFF);
}

test_giantrepeat_crbug118018()

static void test_giantrepeat_crbug118018 ( skiatest::Reporter *  reporter )

static

Definition at line 184 of file DrawBitmapRectTest.cpp.

                                                                     {
    static const struct {
        int fWidth;
        int fHeight;
    } gTests[] = {
        { 0x1b294, 0x7f},   // crbug 118018 (width exceeds 64K)... should draw safely now.
        { 0xFFFF, 0x7f },   // should draw, test max width
        { 0x7f, 0xFFFF },   // should draw, test max height
    };
 
    for (size_t i = 0; i < std::size(gTests); ++i) {
        test_wacky_bitmapshader(reporter,
                                gTests[i].fWidth, gTests[i].fHeight);
    }
}

test_nan_antihair()

static void test_nan_antihair ( )

static

Definition at line 202 of file DrawBitmapRectTest.cpp.

                                {
    SkBitmap bm;
    bm.allocN32Pixels(20, 20);
 
    SkCanvas canvas(bm);
 
    SkPath path;
    path.moveTo(0, 0);
    path.lineTo(10, SK_ScalarNaN);
 
    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setStyle(SkPaint::kStroke_Style);
 
    // before our fix to SkScan_Antihair.cpp to check for integral NaN (0x800...)
    // this would trigger an assert/crash.
    //
    // see rev. 3558
    canvas.drawPath(path, paint);
}

test_treatAsSprite()

static void test_treatAsSprite ( skiatest::Reporter *  reporter )

static

Definition at line 53 of file DrawBitmapRectTest.cpp.

                                                           {
 
    SkMatrix mat;
    SkISize  size;
    SkRandom rand;
 
    const SkSamplingOptions sampling;
 
    // assert: translate-only no-aa can always be treated as sprite
    for (int i = 0; i < 1000; ++i) {
        rand_matrix(&mat, rand, SkMatrix::kTranslate_Mask);
        for (int j = 0; j < 1000; ++j) {
            rand_size(&size, rand);
            REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, sampling, false));
        }
    }
 
    // assert: rotate/perspect is never treated as sprite
    for (int i = 0; i < 1000; ++i) {
        rand_matrix(&mat, rand, SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask);
        for (int j = 0; j < 1000; ++j) {
            rand_size(&size, rand);
            REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, sampling, false));
            REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, sampling, true));
        }
    }
 
    size.set(500, 600);
 
    const SkScalar tooMuchSubpixel = 100.1f;
    mat.setTranslate(tooMuchSubpixel, 0);
    REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, sampling, true));
    mat.setTranslate(0, tooMuchSubpixel);
    REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, sampling, true));
 
    const SkScalar tinySubPixel = 100.02f;
    mat.setTranslate(tinySubPixel, 0);
    REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, sampling, true));
    mat.setTranslate(0, tinySubPixel);
    REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, sampling, true));
 
    const SkScalar twoThirds = SK_Scalar1 * 2 / 3;
    const SkScalar bigScale = (size.width() + twoThirds) / size.width();
    mat.setScale(bigScale, bigScale);
    REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, sampling, false));
    REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, sampling, true));
 
    const SkScalar oneThird = SK_Scalar1 / 3;
    const SkScalar smallScale = (size.width() + oneThird) / size.width();
    mat.setScale(smallScale, smallScale);
    REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, sampling, false));
    REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, size, sampling, true));
 
    const SkScalar oneFortyth = SK_Scalar1 / 40;
    const SkScalar tinyScale = (size.width() + oneFortyth) / size.width();
    mat.setScale(tinyScale, tinyScale);
    REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, sampling, false));
    REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, size, sampling, true));
}

test_wacky_bitmapshader()

static void test_wacky_bitmapshader ( skiatest::Reporter *  reporter, int  width, int  height  )

static

Definition at line 113 of file DrawBitmapRectTest.cpp.

                                                           {
    SkBitmap dev;
    dev.allocN32Pixels(0x56F, 0x4f6);
    dev.eraseColor(SK_ColorTRANSPARENT);  // necessary, so we know if we draw to it
 
    SkMatrix matrix;
 
    SkCanvas c(dev);
    matrix.setAll(-119.34097f,
                  -43.436558f,
                  93489.945f,
                  43.436558f,
                  -119.34097f,
                  123.98426f,
                  0, 0, SK_Scalar1);
    c.concat(matrix);
 
    SkBitmap bm;
    if (bm.tryAllocN32Pixels(width, height)) {
        bm.eraseColor(SK_ColorRED);
    } else {
        SkASSERT(false);
        return;
    }
 
    matrix.setAll(0.0078740157f,
                  0,
                  SkIntToScalar(249),
                  0,
                  0.0078740157f,
                  SkIntToScalar(239),
                  0, 0, SK_Scalar1);
    SkPaint paint;
    paint.setShader(bm.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
                                  SkSamplingOptions(), matrix));
 
    SkRect r = SkRect::MakeXYWH(681, 239, 695, 253);
    c.drawRect(r, paint);
 
    for (int y = 0; y < dev.height(); ++y) {
        for (int x = 0; x < dev.width(); ++x) {
            if (SK_ColorTRANSPARENT == *dev.getAddr32(x, y)) {
                REPORTER_ASSERT(reporter, false);
                return;
            }
        }
    }
}

Variable Documentation

gHeight

const int gHeight = 256

static

Definition at line 237 of file DrawBitmapRectTest.cpp.

gWidth

const int gWidth = 256

static

Definition at line 236 of file DrawBitmapRectTest.cpp.