// once again, this is based on the Microsoft sample above
static void drawOpacitySlider(struct colorDialog *c, ID2D1RenderTarget *rt)
{
D2D1_SIZE_F size;
D2D1_RECT_F rect;
D2D1_GRADIENT_STOP stops[2];
ID2D1GradientStopCollection *collection;
D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES lprop;
D2D1_BRUSH_PROPERTIES bprop;
ID2D1LinearGradientBrush *brush;
double hypot;
D2D1_POINT_2F center;
HRESULT hr;
size = realGetSize(rt);
rect.left = 0;
rect.top = 0;
rect.right = size.width;
rect.bottom = size.height * (5.0 / 6.0); // bottommost sixth for arrow
drawGrid(rt, &rect);
stops[0].position = 0.0;
stops[0].color.r = 0.0;
stops[0].color.g = 0.0;
stops[0].color.b = 0.0;
stops[0].color.a = 1.0;
stops[1].position = 1.0;
stops[1].color.r = 1.0; // this is the XAML color Transparent, as in the source
stops[1].color.g = 1.0;
stops[1].color.b = 1.0;
stops[1].color.a = 0.0;
hr = rt->CreateGradientStopCollection(stops, 2,
// note that in this case this gamma is explicitly specified by the original
D2D1_GAMMA_2_2, D2D1_EXTEND_MODE_CLAMP,
&collection);
if (hr != S_OK)
logHRESULT(L"error creating stop collection for opacity slider gradient", hr);
ZeroMemory(&lprop, sizeof (D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES));
lprop.startPoint.x = 0;
lprop.startPoint.y = (rect.bottom - rect.top) / 2;
lprop.endPoint.x = size.width;
lprop.endPoint.y = (rect.bottom - rect.top) / 2;
ZeroMemory(&bprop, sizeof (D2D1_BRUSH_PROPERTIES));
bprop.opacity = 1.0;
bprop.transform._11 = 1;
bprop.transform._22 = 1;
hr = rt->CreateLinearGradientBrush(&lprop, &bprop,
collection, &brush);
if (hr != S_OK)
logHRESULT(L"error creating gradient brush for opacity slider", hr);
rt->FillRectangle(&rect, brush);
brush->Release();
collection->Release();
// now draw a black arrow
center.x = (1 - c->a) * size.width;
center.y = size.height;
hypot = size.height - rect.bottom;
drawArrow(rt, center, hypot);
}
//-----------------------------------------------------------------------------
void D2DDrawContext::fillLinearGradient (CGraphicsPath* _path, const CGradient& gradient, const CPoint& startPoint, const CPoint& endPoint, bool evenOdd, CGraphicsTransform* t)
{
if (renderTarget == 0)
return;
D2DGraphicsPath* d2dPath = dynamic_cast<D2DGraphicsPath*> (_path);
if (d2dPath == 0)
return;
ID2D1PathGeometry* path = d2dPath->getPath (evenOdd ? D2D1_FILL_MODE_ALTERNATE : D2D1_FILL_MODE_WINDING);
if (path)
{
D2DApplyClip ac (this);
ID2D1Geometry* geometry = 0;
if (t)
{
ID2D1TransformedGeometry* tg = 0;
D2D1_MATRIX_3X2_F matrix;
matrix._11 = (FLOAT)t->m11;
matrix._12 = (FLOAT)t->m12;
matrix._21 = (FLOAT)t->m21;
matrix._22 = (FLOAT)t->m22;
matrix._31 = (FLOAT)t->dx;
matrix._32 = (FLOAT)t->dy;
getD2DFactory ()->CreateTransformedGeometry (path, matrix, &tg);
geometry = tg;
}
else
{
geometry = path;
geometry->AddRef ();
}
ID2D1GradientStopCollection* collection = 0;
D2D1_GRADIENT_STOP gradientStops[2];
gradientStops[0].position = (FLOAT)gradient.getColor1Start ();
gradientStops[1].position = (FLOAT)gradient.getColor2Start ();
gradientStops[0].color = D2D1::ColorF (gradient.getColor1 ().red/255.f, gradient.getColor1 ().green/255.f, gradient.getColor1 ().blue/255.f, gradient.getColor1 ().alpha/255.f * currentState.globalAlpha);
gradientStops[1].color = D2D1::ColorF (gradient.getColor2 ().red/255.f, gradient.getColor2 ().green/255.f, gradient.getColor2 ().blue/255.f, gradient.getColor2 ().alpha/255.f * currentState.globalAlpha);
if (SUCCEEDED (getRenderTarget ()->CreateGradientStopCollection (gradientStops, 2, &collection)))
{
ID2D1LinearGradientBrush* brush = 0;
D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES properties;
properties.startPoint = makeD2DPoint (startPoint);
properties.endPoint = makeD2DPoint (endPoint);
if (SUCCEEDED (getRenderTarget ()->CreateLinearGradientBrush (properties, collection, &brush)))
{
getRenderTarget ()->SetTransform (D2D1::Matrix3x2F::Translation ((FLOAT)getOffset ().x, (FLOAT)getOffset ().y));
getRenderTarget ()->FillGeometry (geometry, brush);
getRenderTarget ()->SetTransform (D2D1::Matrix3x2F::Identity ());
brush->Release ();
}
collection->Release ();
}
geometry->Release ();
}
}
//-----------------------------------------------------------------------------
void D2DDrawContext::fillLinearGradient (CGraphicsPath* _path, const CGradient& gradient, const CPoint& startPoint, const CPoint& endPoint, bool evenOdd, CGraphicsTransform* t)
{
if (renderTarget == 0)
return;
bool halfPointOffset = currentState.drawMode.integralMode () ? ((((int32_t)currentState.frameWidth) % 2) != 0) : false;
D2DApplyClip ac (this, halfPointOffset);
if (ac.isEmpty ())
return;
D2DGraphicsPath* d2dPath = dynamic_cast<D2DGraphicsPath*> (_path);
if (d2dPath == 0)
return;
ID2D1Geometry* path = d2dPath->createPath (evenOdd ? D2D1_FILL_MODE_ALTERNATE : D2D1_FILL_MODE_WINDING, this, t);
if (path)
{
ID2D1GradientStopCollection* collection = createGradientStopCollection (gradient);
if (collection)
{
ID2D1LinearGradientBrush* brush = 0;
D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES properties;
properties.startPoint = makeD2DPoint (startPoint);
properties.endPoint = makeD2DPoint (endPoint);
if (SUCCEEDED (getRenderTarget ()->CreateLinearGradientBrush (properties, collection, &brush)))
{
getRenderTarget ()->FillGeometry (path, brush);
brush->Release ();
}
collection->Release ();
}
path->Release ();
}
}
static void drawHSlider(struct colorDialog *c, ID2D1RenderTarget *rt)
{
D2D1_SIZE_F size;
D2D1_RECT_F rect;
D2D1_GRADIENT_STOP stops[nStops];
double r, g, b;
int i;
double h;
ID2D1GradientStopCollection *collection;
D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES lprop;
D2D1_BRUSH_PROPERTIES bprop;
ID2D1LinearGradientBrush *brush;
double hypot;
D2D1_POINT_2F center;
HRESULT hr;
size = realGetSize(rt);
rect.left = size.width / 6; // leftmost sixth for arrow
rect.top = 0;
rect.right = size.width;
rect.bottom = size.height;
for (i = 0; i < nStops; i++) {
h = ((double) (i * degPerStop)) / 360.0;
if (i == (nStops - 1))
h = 0;
hsv2RGB(h, 1.0, 1.0, &r, &g, &b);
stops[i].position = ((double) i) * stopIncr;
stops[i].color.r = r;
stops[i].color.g = g;
stops[i].color.b = b;
stops[i].color.a = 1.0;
}
// and pin the last one
stops[i - 1].position = 1.0;
hr = rt->CreateGradientStopCollection(stops, nStops,
// note that in this case this gamma is explicitly specified by the original
D2D1_GAMMA_2_2, D2D1_EXTEND_MODE_CLAMP,
&collection);
if (hr != S_OK)
logHRESULT(L"error creating stop collection for H slider gradient", hr);
ZeroMemory(&lprop, sizeof (D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES));
lprop.startPoint.x = (rect.right - rect.left) / 2;
lprop.startPoint.y = 0;
lprop.endPoint.x = (rect.right - rect.left) / 2;
lprop.endPoint.y = size.height;
ZeroMemory(&bprop, sizeof (D2D1_BRUSH_PROPERTIES));
bprop.opacity = 1.0;
bprop.transform._11 = 1;
bprop.transform._22 = 1;
hr = rt->CreateLinearGradientBrush(&lprop, &bprop,
collection, &brush);
if (hr != S_OK)
logHRESULT(L"error creating gradient brush for H slider", hr);
rt->FillRectangle(&rect, brush);
brush->Release();
collection->Release();
// now draw a black arrow
center.x = 0;
center.y = c->h * size.height;
hypot = rect.left;
drawArrow(rt, center, hypot);
}
// this interesting approach comes from http://blogs.msdn.com/b/wpfsdk/archive/2006/10/26/uncommon-dialogs--font-chooser-and-color-picker-dialogs.aspx
static void drawSVChooser(struct colorDialog *c, ID2D1RenderTarget *rt)
{
D2D1_SIZE_F size;
D2D1_RECT_F rect;
double rTop, gTop, bTop;
D2D1_GRADIENT_STOP stops[2];
ID2D1GradientStopCollection *collection;
D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES lprop;
D2D1_BRUSH_PROPERTIES bprop;
ID2D1LinearGradientBrush *brush;
ID2D1LinearGradientBrush *opacity;
ID2D1Layer *layer;
D2D1_LAYER_PARAMETERS layerparams;
D2D1_ELLIPSE mparam;
D2D1_COLOR_F mcolor;
ID2D1SolidColorBrush *markerBrush;
HRESULT hr;
size = realGetSize(rt);
rect.left = 0;
rect.top = 0;
rect.right = size.width;
rect.bottom = size.height;
drawGrid(rt, &rect);
// first, draw a vertical gradient from the current hue at max S/V to black
// the source example draws it upside down; let's do so too just to be safe
hsv2RGB(c->h, 1.0, 1.0, &rTop, &gTop, &bTop);
stops[0].position = 0;
stops[0].color.r = 0.0;
stops[0].color.g = 0.0;
stops[0].color.b = 0.0;
stops[0].color.a = 1.0;
stops[1].position = 1;
stops[1].color.r = rTop;
stops[1].color.g = gTop;
stops[1].color.b = bTop;
stops[1].color.a = 1.0;
hr = rt->CreateGradientStopCollection(stops, 2,
D2D1_GAMMA_2_2, D2D1_EXTEND_MODE_CLAMP,
&collection);
if (hr != S_OK)
logHRESULT(L"error making gradient stop collection for first gradient in SV chooser", hr);
ZeroMemory(&lprop, sizeof (D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES));
lprop.startPoint.x = size.width / 2;
lprop.startPoint.y = size.height;
lprop.endPoint.x = size.width / 2;
lprop.endPoint.y = 0;
// TODO decide what to do about the duplication of this
ZeroMemory(&bprop, sizeof (D2D1_BRUSH_PROPERTIES));
bprop.opacity = c->a; // note this part; we also use it below for the layer
bprop.transform._11 = 1;
bprop.transform._22 = 1;
hr = rt->CreateLinearGradientBrush(&lprop, &bprop,
collection, &brush);
if (hr != S_OK)
logHRESULT(L"error making gradient brush for first gradient in SV chooser", hr);
rt->FillRectangle(&rect, brush);
brush->Release();
collection->Release();
// second, create an opacity mask for the third step: a horizontal gradientthat goes from opaque to translucent
stops[0].position = 0;
stops[0].color.r = 0.0;
stops[0].color.g = 0.0;
stops[0].color.b = 0.0;
stops[0].color.a = 1.0;
stops[1].position = 1;
stops[1].color.r = 0.0;
stops[1].color.g = 0.0;
stops[1].color.b = 0.0;
stops[1].color.a = 0.0;
hr = rt->CreateGradientStopCollection(stops, 2,
D2D1_GAMMA_2_2, D2D1_EXTEND_MODE_CLAMP,
&collection);
if (hr != S_OK)
logHRESULT(L"error making gradient stop collection for opacity mask gradient in SV chooser", hr);
ZeroMemory(&lprop, sizeof (D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES));
lprop.startPoint.x = 0;
lprop.startPoint.y = size.height / 2;
lprop.endPoint.x = size.width;
lprop.endPoint.y = size.height / 2;
ZeroMemory(&bprop, sizeof (D2D1_BRUSH_PROPERTIES));
bprop.opacity = 1.0;
bprop.transform._11 = 1;
bprop.transform._22 = 1;
hr = rt->CreateLinearGradientBrush(&lprop, &bprop,
collection, &opacity);
if (hr != S_OK)
logHRESULT(L"error making gradient brush for opacity mask gradient in SV chooser", hr);
collection->Release();
// finally, make a vertical gradient from white at the top to black at the bottom (right side up this time) and with the previous opacity mask
stops[0].position = 0;
stops[0].color.r = 1.0;
stops[0].color.g = 1.0;
stops[0].color.b = 1.0;
stops[0].color.a = 1.0;
stops[1].position = 1;
stops[1].color.r = 0.0;
stops[1].color.g = 0.0;
stops[1].color.b = 0.0;
stops[1].color.a = 1.0;
hr = rt->CreateGradientStopCollection(stops, 2,
D2D1_GAMMA_2_2, D2D1_EXTEND_MODE_CLAMP,
&collection);
if (hr != S_OK)
logHRESULT(L"error making gradient stop collection for second gradient in SV chooser", hr);
ZeroMemory(&lprop, sizeof (D2D1_LINEAR_GRADIENT_BRUSH_PROPERTIES));
lprop.startPoint.x = size.width / 2;
lprop.startPoint.y = 0;
lprop.endPoint.x = size.width / 2;
lprop.endPoint.y = size.height;
ZeroMemory(&bprop, sizeof (D2D1_BRUSH_PROPERTIES));
bprop.opacity = 1.0;
bprop.transform._11 = 1;
bprop.transform._22 = 1;
hr = rt->CreateLinearGradientBrush(&lprop, &bprop,
collection, &brush);
if (hr != S_OK)
logHRESULT(L"error making gradient brush for second gradient in SV chooser", hr);
// oh but wait we can't use FillRectangle() with an opacity mask
// and we can't use FillGeometry() with both an opacity mask and a non-bitmap
// layers it is!
hr = rt->CreateLayer(&size, &layer);
if (hr != S_OK)
logHRESULT(L"error making layer for second gradient in SV chooser", hr);
ZeroMemory(&layerparams, sizeof (D2D1_LAYER_PARAMETERS));
layerparams.contentBounds = rect;
// TODO make sure these are right
layerparams.geometricMask = NULL;
layerparams.maskAntialiasMode = D2D1_ANTIALIAS_MODE_PER_PRIMITIVE;
layerparams.maskTransform._11 = 1;
layerparams.maskTransform._22 = 1;
layerparams.opacity = c->a; // here's the other use of c->a to note
layerparams.opacityBrush = opacity;
layerparams.layerOptions = D2D1_LAYER_OPTIONS_NONE;
rt->PushLayer(&layerparams, layer);
rt->FillRectangle(&rect, brush);
rt->PopLayer();
layer->Release();
brush->Release();
collection->Release();
opacity->Release();
// and now we just draw the marker
ZeroMemory(&mparam, sizeof (D2D1_ELLIPSE));
mparam.point.x = c->s * size.width;
mparam.point.y = (1 - c->v) * size.height;
mparam.radiusX = 7;
mparam.radiusY = 7;
// TODO make the color contrast?
mcolor.r = 1.0;
mcolor.g = 1.0;
mcolor.b = 1.0;
mcolor.a = 1.0;
bprop.opacity = 1.0; // the marker should always be opaque
hr = rt->CreateSolidColorBrush(&mcolor, &bprop, &markerBrush);
if (hr != S_OK)
logHRESULT(L"error creating brush for SV chooser marker", hr);
rt->DrawEllipse(&mparam, markerBrush, 2, NULL);
markerBrush->Release();
}