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Implemented the grid-drawing function. Now we can write the other two views.

This commit is contained in:
Pietro Gagliardi 2016-05-17 22:55:35 -04:00
parent b226288584
commit 22a1525d24
1 changed files with 75 additions and 1 deletions
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76
windows/colordialog.cpp
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@ -291,6 +291,79 @@ static void updateDialog(struct colorDialog *c, HWND whichChanged)
c->updating = FALSE;
}
// this imitates http://blogs.msdn.com/b/wpfsdk/archive/2006/10/26/uncommon-dialogs--font-chooser-and-color-picker-dialogs.aspx
static void drawGrid(ID2D1RenderTarget *rt, D2D1_RECT_F *fillRect)
{
D2D1_SIZE_F size;
D2D1_PIXEL_FORMAT pformat;
ID2D1BitmapRenderTarget *brt;
D2D1_COLOR_F color;
D2D1_BRUSH_PROPERTIES bprop;
ID2D1SolidColorBrush *brush;
D2D1_RECT_F rect;
ID2D1Bitmap *bitmap;
D2D1_BITMAP_BRUSH_PROPERTIES bbp;
ID2D1BitmapBrush *bb;
HRESULT hr;
// mind the divisions; they represent the fact the original uses a viewport
size.width = 100 / 10;
size.height = 100 / 10;
pformat = rt->GetPixelFormat();
hr = rt->CreateCompatibleRenderTarget(&size, NULL,
&pformat, D2D1_COMPATIBLE_RENDER_TARGET_OPTIONS_NONE,
&brt);
if (hr != S_OK)
logHRESULT(L"error creating render target for grid", hr);
brt->BeginDraw();
color.r = 1.0;
color.g = 1.0;
color.b = 1.0;
color.a = 1.0;
brt->Clear(&color);
color = D2D1::ColorF(D2D1::ColorF::LightGray, 1.0);
ZeroMemory(&bprop, sizeof (D2D1_BRUSH_PROPERTIES));
bprop.opacity = 1.0;
bprop.transform._11 = 1;
bprop.transform._22 = 1;
hr = brt->CreateSolidColorBrush(&color, &bprop, &brush);
if (hr != S_OK)
logHRESULT(L"error creating brush for grid", hr);
rect.left = 0;
rect.top = 0;
rect.right = 50 / 10;
rect.bottom = 50 / 10;
brt->FillRectangle(&rect, brush);
rect.left = 50 / 10;
rect.top = 50 / 10;
rect.right = 100 / 10;
rect.bottom = 100 / 10;
brt->FillRectangle(&rect, brush);
brush->Release();
hr = brt->EndDraw(NULL, NULL);
if (hr != S_OK)
logHRESULT(L"error finalizing render target for grid", hr);
hr = brt->GetBitmap(&bitmap);
if (hr != S_OK)
logHRESULT(L"error getting bitmap for grid", hr);
brt->Release();
ZeroMemory(&bbp, sizeof (D2D1_BITMAP_BRUSH_PROPERTIES));
bbp.extendModeX = D2D1_EXTEND_MODE_WRAP;
bbp.extendModeY = D2D1_EXTEND_MODE_WRAP;
bbp.interpolationMode = D2D1_BITMAP_INTERPOLATION_MODE_NEAREST_NEIGHBOR;
hr = rt->CreateBitmapBrush(bitmap, &bbp, &bprop, &bb);
if (hr != S_OK)
logHRESULT(L"error creating bitmap brush for grid", hr);
rt->FillRectangle(fillRect, bb);
bb->Release();
bitmap->Release();
}
// 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)
{
@ -316,7 +389,7 @@ static void drawSVChooser(struct colorDialog *c, ID2D1RenderTarget *rt)
rect.right = size.width;
rect.bottom = size.height;
// TODO draw checkerboard
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
@ -341,6 +414,7 @@ static void drawSVChooser(struct colorDialog *c, ID2D1RenderTarget *rt)
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;