imagemakewithfilter.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkFont.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkPoint3.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkRegion.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkImageFilters.h"
#include "tools/DecodeUtils.h"
#include "tools/GpuToolUtils.h"
#include "tools/Resources.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"
#include <utility>

Go to the source code of this file.

Classes
class	ImageMakeWithFilterGM

Typedefs
typedef sk_sp< SkImageFilter >(*	FilterFactory) (sk_sp< SkImage > auxImage, const SkIRect *cropRect)

Functions
static void	show_bounds (SkCanvas *canvas, const SkIRect *clip, const SkIRect *inSubset, const SkIRect *outSubset)
static sk_sp< SkImageFilter >	color_filter_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	blur_filter_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	drop_shadow_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	offset_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	dilate_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	erode_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	displacement_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	arithmetic_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	blend_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	convolution_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	matrix_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	lighting_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)
static sk_sp< SkImageFilter >	tile_factory (sk_sp< SkImage > auxImage, const SkIRect *cropRect)

Typedef Documentation

FilterFactory

typedef sk_sp< SkImageFilter >(* FilterFactory) (sk_sp< SkImage > auxImage, const SkIRect *cropRect)

Definition at line 69 of file imagemakewithfilter.cpp.

Function Documentation

arithmetic_factory()

static sk_sp< SkImageFilter > arithmetic_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 105 of file imagemakewithfilter.cpp.

                                                                                                 {
    sk_sp<SkImageFilter> background = SkImageFilters::Image(std::move(auxImage),
                                                            SkFilterMode::kLinear);
    return SkImageFilters::Arithmetic(0.0f, .6f, 1.f, 0.f, false, std::move(background),
                                      nullptr, cropRect);
}

blend_factory()

static sk_sp< SkImageFilter > blend_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 112 of file imagemakewithfilter.cpp.

                                                                                            {
    sk_sp<SkImageFilter> background = SkImageFilters::Image(std::move(auxImage),
                                                            SkFilterMode::kLinear);
    return SkImageFilters::Blend(
            SkBlendMode::kModulate, std::move(background), nullptr, cropRect);
}

blur_filter_factory()

static sk_sp< SkImageFilter > blur_filter_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 78 of file imagemakewithfilter.cpp.

                                                                                                  {
    return SkImageFilters::Blur(2.0f, 2.0f, nullptr, cropRect);
}

color_filter_factory()

static sk_sp< SkImageFilter > color_filter_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 71 of file imagemakewithfilter.cpp.

                                                                                                   {
    // The color filter uses kSrcIn so that it respects the transparency introduced by clamping;
    // using kSrc would just turn the entire out rect to green regardless.
    auto cf = SkColorFilters::Blend(SK_ColorGREEN, SkBlendMode::kSrcIn);
    return SkImageFilters::ColorFilter(std::move(cf), nullptr, cropRect);
}

convolution_factory()

static sk_sp< SkImageFilter > convolution_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 119 of file imagemakewithfilter.cpp.

                                                                                                  {
    SkISize kernelSize = SkISize::Make(3, 3);
    SkIPoint kernelOffset = SkIPoint::Make(1, 1);
    // A Laplacian edge detector, ee https://en.wikipedia.org/wiki/Kernel_(image_processing)
    SkScalar kernel[9] = {-1.f, -1.f, -1.f,
                          -1.f, 8.f, -1.f,
                          -1.f, -1.f, -1.f};
    return SkImageFilters::MatrixConvolution(kernelSize, kernel, 1.f, 0.f, kernelOffset,
                                             SkTileMode::kClamp, false, nullptr, cropRect);
}

dilate_factory()

static sk_sp< SkImageFilter > dilate_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 90 of file imagemakewithfilter.cpp.

                                                                                             {
    return SkImageFilters::Dilate(10.f, 5.f, nullptr, cropRect);
}

displacement_factory()

static sk_sp< SkImageFilter > displacement_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 98 of file imagemakewithfilter.cpp.

                                                                                                   {
    sk_sp<SkImageFilter> displacement = SkImageFilters::Image(std::move(auxImage),
                                                              SkFilterMode::kLinear);
    return SkImageFilters::DisplacementMap(SkColorChannel::kR, SkColorChannel::kG, 40.f,
                                           std::move(displacement), nullptr, cropRect);
}

drop_shadow_factory()

static sk_sp< SkImageFilter > drop_shadow_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 82 of file imagemakewithfilter.cpp.

                                                                                                  {
    return SkImageFilters::DropShadow(10.0f, 5.0f, 3.0f, 3.0f, SK_ColorBLUE, nullptr, cropRect);
}

erode_factory()

static sk_sp< SkImageFilter > erode_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 94 of file imagemakewithfilter.cpp.

                                                                                            {
    return SkImageFilters::Erode(10.f, 5.f, nullptr, cropRect);
}

lighting_factory()

static sk_sp< SkImageFilter > lighting_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 138 of file imagemakewithfilter.cpp.

                                                                                               {
    // Must convert the RGB values of the source to alpha, since that is what the lighting filters
    // use to estimate their normals. This color matrix changes the color to white and the alpha
    // to be equal to the approx. luminance of the original color.
    static const float kMatrix[20] = {
        0.f, 0.f, 0.f, 0.f, 1.f,
        0.f, 0.f, 0.f, 0.f, 1.f,
        0.f, 0.f, 0.f, 0.f, 1.f,
        0.2126f, 0.7152f, 0.0722f, 0.f, 0.f
    };
    sk_sp<SkImageFilter> srcToAlpha = SkImageFilters::ColorFilter(
            SkColorFilters::Matrix(kMatrix), nullptr);
 
    // Combine both specular and diffuse into a single DAG since they use separate internal filter
    // implementations.
    SkScalar sinAzimuth = SkScalarSin(SkDegreesToRadians(225.f)),
             cosAzimuth = SkScalarCos(SkDegreesToRadians(225.f));
 
    SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
    SkPoint3 diffLocation = SkPoint3::Make(spotTarget.fX + 50 * cosAzimuth,
                                           spotTarget.fY + 50 * sinAzimuth,
                                           SkIntToScalar(10));
    SkPoint3 specLocation = SkPoint3::Make(spotTarget.fX - 50 * sinAzimuth,
                                           spotTarget.fY + 50 * cosAzimuth,
                                           SkIntToScalar(10));
    sk_sp<SkImageFilter> diffuse = SkImageFilters::PointLitDiffuse(
            diffLocation, SK_ColorWHITE, /* scale */ 1.f, /* kd */ 2.f, srcToAlpha, cropRect);
    sk_sp<SkImageFilter> specular = SkImageFilters::PointLitSpecular(
            specLocation, SK_ColorRED, /* scale */ 1.f, /* ks */ 1.f, /* shine */ 8.f,
            srcToAlpha, cropRect);
    return SkImageFilters::Merge(std::move(diffuse), std::move(specular), cropRect);
}

matrix_factory()

static sk_sp< SkImageFilter > matrix_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 130 of file imagemakewithfilter.cpp.

                                                                                             {
    SkMatrix matrix = SkMatrix::I();
    matrix.setRotate(45.f, 50.f, 50.f);
 
    // This doesn't support a cropRect
    return SkImageFilters::MatrixTransform(matrix, SkSamplingOptions(SkFilterMode::kLinear), nullptr);
}

offset_factory()

static sk_sp< SkImageFilter > offset_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 86 of file imagemakewithfilter.cpp.

                                                                                             {
    return SkImageFilters::Offset(10.f, 5.f, nullptr, cropRect);
}

show_bounds()

static void show_bounds ( SkCanvas *  canvas, const SkIRect *  clip, const SkIRect *  inSubset, const SkIRect *  outSubset  )

static

Definition at line 49 of file imagemakewithfilter.cpp.

                                                  {
    const SkIRect* rects[] { clip, inSubset, outSubset };
    SkColor colors[] { SK_ColorBLUE, SK_ColorYELLOW, SK_ColorRED };
 
    SkPaint paint;
    paint.setStyle(SkPaint::kStroke_Style);
 
    for (size_t i = 0; i < std::size(rects); ++i) {
        // Skip null bounds rects, since not all methods have subsets
        if (rects[i]) {
            paint.setColor(colors[i]);
            canvas->drawRect(SkRect::Make(*(rects[i])), paint);
        }
    }
}

tile_factory()

static sk_sp< SkImageFilter > tile_factory ( sk_sp< SkImage >  auxImage, const SkIRect *  cropRect  )

static

Definition at line 171 of file imagemakewithfilter.cpp.

                                                                                           {
    // Tile the subset over a large region
    return SkImageFilters::Tile(SkRect::MakeLTRB(25, 25, 75, 75), SkRect::MakeWH(100, 100),
                                nullptr);
}