// find_quad_roots returns the values sorted, so we start with the last
float t = roots[countRoots - 1];
float r = lerp(fRec.fRadius, fRec.fDRadius, t);
- if (r <= 0) {
+ if (r < 0) {
t = roots[0]; // might be the same as roots[countRoots-1]
r = lerp(fRec.fRadius, fRec.fDRadius, t);
- if (r <= 0) {
+ if (r < 0) {
return TwoPtRadial::kDontDrawT;
}
}
*/
#include "SkCanvas.h"
+#include "SkColorPriv.h"
#include "SkColorShader.h"
#include "SkGradientShader.h"
#include "SkShader.h"
surface->getCanvas()->drawRect(r, paint);
}
+// https://bugs.chromium.org/p/skia/issues/detail?id=5023
+// We should still shade pixels for which the radius is exactly 0.
+static void test_two_point_conical_zero_radius(skiatest::Reporter* reporter) {
+ SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(5, 5));
+ surface->getCanvas()->clear(SK_ColorRED);
+
+ const SkColor colors[] = { SK_ColorGREEN, SK_ColorBLUE };
+ SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(
+ SkPoint::Make(2.5f, 2.5f), 0,
+ SkPoint::Make(3.0f, 3.0f), 10,
+ colors, nullptr, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode));
+ SkPaint p;
+ p.setShader(shader);
+ surface->getCanvas()->drawPaint(p);
+
+ // r == 0 for the center pixel.
+ // verify that we draw it (no red bleed)
+ SkPMColor centerPMColor;
+ surface->readPixels(SkImageInfo::MakeN32Premul(1, 1), ¢erPMColor, sizeof(SkPMColor), 2, 2);
+ REPORTER_ASSERT(reporter, SkGetPackedR32(centerPMColor) == 0);
+}
+
DEF_TEST(Gradient, reporter) {
TestGradientShaders(reporter);
TestConstantGradient(reporter);
test_big_grad(reporter);
test_nearly_vertical(reporter);
test_linear_fuzz(reporter);
+ test_two_point_conical_zero_radius(reporter);
}