BlackBerry::Platform::Graphics::Gradient* Gradient::platformGradient()
{
if (m_gradient)
return m_gradient;
if (m_radial)
m_gradient = BlackBerry::Platform::Graphics::Gradient::createRadialGradient(m_p0, m_p1, m_r0, m_r1, m_aspectRatio, (BlackBerry::Platform::Graphics::Gradient::SpreadMethod)m_spreadMethod);
else
m_gradient = BlackBerry::Platform::Graphics::Gradient::createLinearGradient(m_p0, m_p1, (BlackBerry::Platform::Graphics::Gradient::SpreadMethod)m_spreadMethod);
sortStopsIfNecessary();
ASSERT(m_stopsSorted);
size_t countUsed = totalStopsNeeded(m_stops.data(), m_stops.size());
ASSERT(countUsed >= 2);
ASSERT(countUsed >= m_stops.size());
Vector<float> pos(countUsed);
Vector<unsigned> colors(countUsed);
fillStops(m_stops.data(), m_stops.size(), pos.data(), colors.data());
m_gradient->setColorStops(pos.data(), colors.data(), countUsed);
if (!m_gradientSpaceTransformation.isIdentity())
m_gradient->setLocalMatrix(reinterpret_cast<const double*>(&m_gradientSpaceTransformation));
return m_gradient;
}
SkShader* Gradient::platformGradient()
{
if (m_gradient)
return m_gradient;
// FIXME: This and compareStops() are also in Gradient.cpp and
// CSSGradientValue.cpp; probably should refactor in WebKit.
if (!m_stopsSorted) {
if (m_stops.size())
std::stable_sort(m_stops.begin(), m_stops.end(), compareStops);
m_stopsSorted = true;
}
size_t countUsed = totalStopsNeeded(m_stops.data(), m_stops.size());
ASSERT(countUsed >= 2);
ASSERT(countUsed >= m_stops.size());
// FIXME: Why is all this manual pointer math needed?!
SkAutoMalloc storage(countUsed * (sizeof(SkColor) + sizeof(SkScalar)));
SkColor* colors = (SkColor*)storage.get();
SkScalar* pos = (SkScalar*)(colors + countUsed);
fillStops(m_stops.data(), m_stops.size(), pos, colors);
SkShader::TileMode tile = SkShader::kClamp_TileMode;
switch (m_spreadMethod) {
case SpreadMethodReflect:
tile = SkShader::kMirror_TileMode;
break;
case SpreadMethodRepeat:
tile = SkShader::kRepeat_TileMode;
break;
case SpreadMethodPad:
tile = SkShader::kClamp_TileMode;
break;
}
if (m_radial) {
// FIXME: CSS radial Gradients allow an offset focal point (the
// "start circle"), but skia doesn't seem to support that, so this just
// ignores m_p0/m_r0 and draws the gradient centered in the "end
// circle" (m_p1/m_r1).
// See http://webkit.org/blog/175/introducing-css-gradients/ for a
// description of the expected behavior.
m_gradient = SkGradientShader::CreateRadial(m_p1,
WebCoreFloatToSkScalar(m_r1), colors, pos,
static_cast<int>(countUsed), tile);
} else {
SkPoint pts[2] = { m_p0, m_p1 };
m_gradient = SkGradientShader::CreateLinear(pts, colors, pos,
static_cast<int>(countUsed), tile);
}
SkMatrix matrix = m_gradientSpaceTransformation;
m_gradient->setLocalMatrix(matrix);
return m_gradient;
}
SkShader* Gradient::platformGradient()
{
if (m_gradient)
return m_gradient;
sortStopsIfNecessary();
ASSERT(m_stopsSorted);
size_t countUsed = totalStopsNeeded(m_stops.data(), m_stops.size());
ASSERT(countUsed >= 2);
ASSERT(countUsed >= m_stops.size());
// FIXME: Why is all this manual pointer math needed?!
SkAutoMalloc storage(countUsed * (sizeof(SkColor) + sizeof(SkScalar)));
SkColor* colors = (SkColor*)storage.get();
SkScalar* pos = (SkScalar*)(colors + countUsed);
fillStops(m_stops.data(), m_stops.size(), pos, colors);
SkShader::TileMode tile = SkShader::kClamp_TileMode;
switch (m_spreadMethod) {
case SpreadMethodReflect:
tile = SkShader::kMirror_TileMode;
break;
case SpreadMethodRepeat:
tile = SkShader::kRepeat_TileMode;
break;
case SpreadMethodPad:
tile = SkShader::kClamp_TileMode;
break;
}
if (m_radial) {
// Since the two-point radial gradient is slower than the plain radial,
// only use it if we have to.
if (m_p0 == m_p1 && m_r0 <= 0.0f) {
// The radius we give to Skia must be positive (and non-zero). If
// we're given a zero radius, just ask for a very small radius so
// Skia will still return an object.
SkScalar radius = m_r1 > 0 ? WebCoreFloatToSkScalar(m_r1) : WebCoreFloatToSkScalar(FLT_EPSILON);
m_gradient = SkGradientShader::CreateRadial(m_p1, radius, colors, pos, static_cast<int>(countUsed), tile);
} else {
// The radii we give to Skia must be positive. If we're given a
// negative radius, ask for zero instead.
SkScalar radius0 = m_r0 >= 0.0f ? WebCoreFloatToSkScalar(m_r0) : 0;
SkScalar radius1 = m_r1 >= 0.0f ? WebCoreFloatToSkScalar(m_r1) : 0;
m_gradient = SkGradientShader::CreateTwoPointRadial(m_p0, radius0, m_p1, radius1, colors, pos, static_cast<int>(countUsed), tile);
}
if (aspectRatio() != 1) {
// CSS3 elliptical gradients: apply the elliptical scaling at the
// gradient center point.
m_gradientSpaceTransformation.translate(m_p0.x(), m_p0.y());
m_gradientSpaceTransformation.scale(1, 1 / aspectRatio());
m_gradientSpaceTransformation.translate(-m_p0.x(), -m_p0.y());
ASSERT(m_p0 == m_p1);
}
} else {
SkPoint pts[2] = { m_p0, m_p1 };
m_gradient = SkGradientShader::CreateLinear(pts, colors, pos, static_cast<int>(countUsed), tile);
}
ASSERT(m_gradient);
SkMatrix matrix = m_gradientSpaceTransformation;
m_gradient->setLocalMatrix(matrix);
return m_gradient;
}
sk_sp<SkShader> Gradient::createShader()
{
sortStopsIfNecessary();
ASSERT(m_stopsSorted);
size_t countUsed = totalStopsNeeded(m_stops.data(), m_stops.size());
ASSERT(countUsed >= 2);
ASSERT(countUsed >= m_stops.size());
ColorStopOffsetVector pos(countUsed);
ColorStopColorVector colors(countUsed);
fillStops(m_stops.data(), m_stops.size(), pos, colors);
SkShader::TileMode tile = SkShader::kClamp_TileMode;
switch (m_spreadMethod) {
case SpreadMethodReflect:
tile = SkShader::kMirror_TileMode;
break;
case SpreadMethodRepeat:
tile = SkShader::kRepeat_TileMode;
break;
case SpreadMethodPad:
tile = SkShader::kClamp_TileMode;
break;
}
sk_sp<SkShader> shader;
uint32_t shouldDrawInPMColorSpace = m_drawInPMColorSpace ? SkGradientShader::kInterpolateColorsInPremul_Flag : 0;
if (m_radial) {
if (aspectRatio() != 1) {
// CSS3 elliptical gradients: apply the elliptical scaling at the
// gradient center point.
m_gradientSpaceTransformation.translate(m_p0.x(), m_p0.y());
m_gradientSpaceTransformation.scale(1, 1 / aspectRatio());
m_gradientSpaceTransformation.translate(-m_p0.x(), -m_p0.y());
ASSERT(m_p0 == m_p1);
}
SkMatrix localMatrix = affineTransformToSkMatrix(m_gradientSpaceTransformation);
// Since the two-point radial gradient is slower than the plain radial,
// only use it if we have to.
if (m_p0 == m_p1 && m_r0 <= 0.0f) {
shader = SkGradientShader::MakeRadial(m_p1.data(), m_r1, colors.data(), pos.data(), static_cast<int>(countUsed), tile, shouldDrawInPMColorSpace, &localMatrix);
} else {
// The radii we give to Skia must be positive. If we're given a
// negative radius, ask for zero instead.
SkScalar radius0 = m_r0 >= 0.0f ? WebCoreFloatToSkScalar(m_r0) : 0;
SkScalar radius1 = m_r1 >= 0.0f ? WebCoreFloatToSkScalar(m_r1) : 0;
shader = SkGradientShader::MakeTwoPointConical(m_p0.data(), radius0, m_p1.data(), radius1, colors.data(), pos.data(), static_cast<int>(countUsed), tile, shouldDrawInPMColorSpace, &localMatrix);
}
} else {
SkPoint pts[2] = { m_p0.data(), m_p1.data() };
SkMatrix localMatrix = affineTransformToSkMatrix(m_gradientSpaceTransformation);
shader = SkGradientShader::MakeLinear(pts, colors.data(), pos.data(), static_cast<int>(countUsed), tile, shouldDrawInPMColorSpace, &localMatrix);
}
if (!shader) {
// use last color, since our "geometry" was degenerate (e.g. radius==0)
shader = SkShader::MakeColorShader(colors[countUsed - 1]);
}
return shader;
}
SkShader* Gradient::shader()
{
if (m_gradient)
return m_gradient.get();
sortStopsIfNecessary();
ASSERT(m_stopsSorted);
size_t countUsed = totalStopsNeeded(m_stops.data(), m_stops.size());
ASSERT(countUsed >= 2);
ASSERT(countUsed >= m_stops.size());
// FIXME: Why is all this manual pointer math needed?!
SkAutoMalloc storage(countUsed * (sizeof(SkColor) + sizeof(SkScalar)));
SkColor* colors = (SkColor*)storage.get();
SkScalar* pos = (SkScalar*)(colors + countUsed);
fillStops(m_stops.data(), m_stops.size(), pos, colors);
SkShader::TileMode tile = SkShader::kClamp_TileMode;
switch (m_spreadMethod) {
case SpreadMethodReflect:
tile = SkShader::kMirror_TileMode;
break;
case SpreadMethodRepeat:
tile = SkShader::kRepeat_TileMode;
break;
case SpreadMethodPad:
tile = SkShader::kClamp_TileMode;
break;
}
uint32_t shouldDrawInPMColorSpace = m_drawInPMColorSpace ? SkGradientShader::kInterpolateColorsInPremul_Flag : 0;
if (m_radial) {
// Since the two-point radial gradient is slower than the plain radial,
// only use it if we have to.
if (m_p0 == m_p1 && m_r0 <= 0.0f) {
m_gradient = adoptRef(SkGradientShader::CreateRadial(m_p1, m_r1, colors, pos, static_cast<int>(countUsed), tile, 0, shouldDrawInPMColorSpace));
} else {
// The radii we give to Skia must be positive. If we're given a
// negative radius, ask for zero instead.
SkScalar radius0 = m_r0 >= 0.0f ? WebCoreFloatToSkScalar(m_r0) : 0;
SkScalar radius1 = m_r1 >= 0.0f ? WebCoreFloatToSkScalar(m_r1) : 0;
m_gradient = adoptRef(SkGradientShader::CreateTwoPointConical(m_p0, radius0, m_p1, radius1, colors, pos, static_cast<int>(countUsed), tile, 0, shouldDrawInPMColorSpace));
}
if (aspectRatio() != 1) {
// CSS3 elliptical gradients: apply the elliptical scaling at the
// gradient center point.
m_gradientSpaceTransformation.translate(m_p0.x(), m_p0.y());
m_gradientSpaceTransformation.scale(1, 1 / aspectRatio());
m_gradientSpaceTransformation.translate(-m_p0.x(), -m_p0.y());
ASSERT(m_p0 == m_p1);
}
} else {
SkPoint pts[2] = { m_p0, m_p1 };
m_gradient = adoptRef(SkGradientShader::CreateLinear(pts, colors, pos, static_cast<int>(countUsed), tile, 0, shouldDrawInPMColorSpace));
}
if (!m_gradient) {
// use last color, since our "geometry" was degenerate (e.g. radius==0)
m_gradient = adoptRef(new SkColorShader(colors[countUsed - 1]));
} else {
m_gradient->setLocalMatrix(affineTransformToSkMatrix(m_gradientSpaceTransformation));
}
return m_gradient.get();
}
SkShader* Gradient::platformGradient()
{
if (m_gradient)
return m_gradient;
// FIXME: This and compareStops() are also in Gradient.cpp and
// CSSGradientValue.cpp; probably should refactor in WebKit.
if (!m_stopsSorted) {
if (m_stops.size())
std::stable_sort(m_stops.begin(), m_stops.end(), compareStops);
m_stopsSorted = true;
}
size_t countUsed = totalStopsNeeded(m_stops.data(), m_stops.size());
ASSERT(countUsed >= 2);
ASSERT(countUsed >= m_stops.size());
// FIXME: Why is all this manual pointer math needed?!
SkAutoMalloc storage(countUsed * (sizeof(SkColor) + sizeof(SkScalar)));
SkColor* colors = (SkColor*)storage.get();
SkScalar* pos = (SkScalar*)(colors + countUsed);
fillStops(m_stops.data(), m_stops.size(), pos, colors);
SkShader::TileMode tile = SkShader::kClamp_TileMode;
switch (m_spreadMethod) {
case SpreadMethodReflect:
tile = SkShader::kMirror_TileMode;
break;
case SpreadMethodRepeat:
tile = SkShader::kRepeat_TileMode;
break;
case SpreadMethodPad:
tile = SkShader::kClamp_TileMode;
break;
}
if (m_radial) {
// Since the two-point radial gradient is slower than the plain radial,
// only use it if we have to.
if (m_p0 == m_p1 && m_r0 <= 0.0f) {
// The radius we give to Skia must be positive (and non-zero). If
// we're given a zero radius, just ask for a very small radius so
// Skia will still return an object.
SkScalar radius = m_r1 > 0 ? WebCoreFloatToSkScalar(m_r1) : SK_ScalarMin;
m_gradient = SkGradientShader::CreateRadial(m_p1, radius, colors, pos, static_cast<int>(countUsed), tile);
} else {
// The radii we give to Skia must be positive. If we're given a
// negative radius, ask for zero instead.
SkScalar radius0 = m_r0 >= 0.0f ? WebCoreFloatToSkScalar(m_r0) : 0;
SkScalar radius1 = m_r1 >= 0.0f ? WebCoreFloatToSkScalar(m_r1) : 0;
m_gradient = SkGradientShader::CreateTwoPointRadial(m_p0, radius0, m_p1, radius1, colors, pos, static_cast<int>(countUsed), tile);
}
} else {
SkPoint pts[2] = { m_p0, m_p1 };
m_gradient = SkGradientShader::CreateLinear(pts, colors, pos,
static_cast<int>(countUsed), tile);
}
ASSERT(m_gradient);
SkMatrix matrix = m_gradientSpaceTransformation;
m_gradient->setLocalMatrix(matrix);
return m_gradient;
}