diff options
Diffstat (limited to 'gm')
| -rw-r--r-- | gm/gradients.cpp | 102 |
1 files changed, 100 insertions, 2 deletions
diff --git a/gm/gradients.cpp b/gm/gradients.cpp index ad745df8c1..9336052366 100644 --- a/gm/gradients.cpp +++ b/gm/gradients.cpp @@ -70,10 +70,23 @@ static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data, data.fColors, data.fPos, data.fCount, tm, mapper); } +static SkShader* Make2Conical(const SkPoint pts[2], const GradData& data, + SkShader::TileMode tm, SkUnitMapper* mapper) { + SkPoint center0, center1; + SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 10); + SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3); + center0.set(pts[0].fX + radius0, pts[0].fY + radius0); + center1.set(pts[1].fX - radius1, pts[1].fY - radius1); + return SkGradientShader::CreateTwoPointConical(center1, radius1, + center0, radius0, + data.fColors, data.fPos, + data.fCount, tm, mapper); +} + typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm, SkUnitMapper* mapper); static const GradMaker gGradMakers[] = { - MakeLinear, MakeRadial, MakeSweep, Make2Radial + MakeLinear, MakeRadial, MakeSweep, Make2Radial, Make2Conical }; /////////////////////////////////////////////////////////////////////////////// @@ -89,7 +102,7 @@ protected: return SkString("gradients"); } - virtual SkISize onISize() { return make_isize(640, 510); } + virtual SkISize onISize() { return make_isize(640, 615); } virtual void onDraw(SkCanvas* canvas) { @@ -121,6 +134,84 @@ private: typedef GM INHERITED; }; +// Based on the original gradient slide, but with perspective applied to the +// gradient shaders' local matrices +class GradientsLocalPerspectiveGM : public GM { +public: + GradientsLocalPerspectiveGM() { + this->setBGColor(0xFFDDDDDD); + } + +protected: + SkString onShortName() { + return SkString("gradients_local_perspective"); + } + + virtual SkISize onISize() { return make_isize(640, 615); } + + virtual void onDraw(SkCanvas* canvas) { + + SkPoint pts[2] = { + { 0, 0 }, + { SkIntToScalar(100), SkIntToScalar(100) } + }; + SkShader::TileMode tm = SkShader::kClamp_TileMode; + SkRect r = { 0, 0, SkIntToScalar(100), SkIntToScalar(100) }; + SkPaint paint; + paint.setAntiAlias(true); + + canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); + for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) { + canvas->save(); + for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); j++) { + SkShader* shader = gGradMakers[j](pts, gGradData[i], tm, NULL); + + // apply an increasing y perspective as we move to the right + SkMatrix perspective; + perspective.setIdentity(); + perspective.setPerspY(SkScalarDiv(SkIntToScalar(i+1), + SkIntToScalar(500))); + perspective.setSkewX(SkScalarDiv(SkIntToScalar(i+1), + SkIntToScalar(10))); + shader->setLocalMatrix(perspective); + + paint.setShader(shader); + canvas->drawRect(r, paint); + shader->unref(); + canvas->translate(0, SkIntToScalar(120)); + } + canvas->restore(); + canvas->translate(SkIntToScalar(120), 0); + } + } + +private: + typedef GM INHERITED; +}; + +// Based on the original gradient slide, but with perspective applied to +// the view matrix +class GradientsViewPerspectiveGM : public GradientsGM { +protected: + SkString onShortName() { + return SkString("gradients_view_perspective"); + } + + virtual SkISize onISize() { return make_isize(640, 400); } + + virtual void onDraw(SkCanvas* canvas) { + SkMatrix perspective; + perspective.setIdentity(); + perspective.setPerspY(SkScalarDiv(SK_Scalar1, SkIntToScalar(1000))); + perspective.setSkewX(SkScalarDiv(SkIntToScalar(8), SkIntToScalar(25))); + canvas->setMatrix(perspective); + INHERITED::onDraw(canvas); + } + +private: + typedef GradientsGM INHERITED; +}; + /* Inspired by this <canvas> javascript, where we need to detect that we are not solving a quadratic equation, but must instead solve a linear (since our X^2 @@ -269,5 +360,12 @@ static GMRegistry reg3(MyFactory3); static GM* MyFactory4(void*) { return new RadialGradientGM; } static GMRegistry reg4(MyFactory4); + +static GM* MyFactory5(void*) { return new GradientsLocalPerspectiveGM; } +static GMRegistry reg5(MyFactory5); + +static GM* MyFactory6(void*) { return new GradientsViewPerspectiveGM; } +static GMRegistry reg6(MyFactory6); } + |