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Drew the marker on the color panel. Now for the hue slider.

This commit is contained in:
Pietro Gagliardi 2016-05-17 12:18:36 -04:00
parent 3128e58c5b
commit 027bb6782b
1 changed files with 109 additions and 2 deletions
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111
windows/colordialog.cpp
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@ -23,7 +23,7 @@ struct colorDialog {
struct colorDialogRGBA *out;
};
// both of these are from the wiki
// both of these are from the wikipedia page on HSV
static void rgb2HSV(double r, double g, double b, double *h, double *s, double *v)
{
double M, m;
@ -121,7 +121,7 @@ static void hsv2RGB(double h, double s, double v, double *r, double *g, double *
// TODO
}
// this interesting approach comes from xxxx
// 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;
@ -133,6 +133,12 @@ static void drawSVChooser(struct colorDialog *c, ID2D1RenderTarget *rt)
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 = rt->GetSize();
@ -178,6 +184,107 @@ static void drawSVChooser(struct colorDialog *c, ID2D1RenderTarget *rt)
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 = 1.0;
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 = s * size.width;
mparam.point.y = (1 - 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;
hr = rt->CreateSolidColorBrush(&mcolor, &bprop, &markerBrush);
if (hr != S_OK)
logHRESULT(L"error creating brush for SV chooser", hr);
rt->DrawEllipse(&mparam, markerBrush, 2, NULL);
markerBrush->Release();
}
static LRESULT CALLBACK svChooserSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)