From 4d39f77dbc8092cbc9c19ea77d9581edf6daa054 Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Wed, 7 Oct 2015 10:10:03 -0400
Subject: [PATCH] Set up a system for brushes.

---
 winarea_d2d/ui.h | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

diff --git a/winarea_d2d/ui.h b/winarea_d2d/ui.h
index b31ecb7f..031f7283 100644
--- a/winarea_d2d/ui.h
+++ b/winarea_d2d/ui.h
@@ -36,15 +36,26 @@ struct uiAreaDrawParams {
 	intmax_t VScrollPos;
 };
 
-// TODO proper sources
 // TODO dotting/dashing
 
 typedef struct uiDrawPath uiDrawPath;
+typedef struct uiDrawBrush uiDrawBrush;
 typedef struct uiDrawStrokeParams uiDrawStrokeParams;
+
+typedef enum uiDrawBrushType uiDrawBrushType;
+typedef struct uiDrawBrushGradientStop uiDrawBrushGradientStop;
+
 typedef enum uiDrawLineCap uiDrawLineCap;
 typedef enum uiDrawLineJoin uiDrawLineJoin;
 typedef enum uiDrawFillMode uiDrawFillMode;
 
+enum uiDrawBrushType {
+	uiDrawBrushTypeSolid,
+/*TODO	uiDrawBrushTypeLinearGradient,
+	uiDrawBrushTypeRadialGradient,
+	uiDrawBrushTypeImage,
+*/};
+
 enum uiDrawLineCap {
 	uiDrawLineCapFlat,
 	uiDrawLineCapRound,
@@ -67,6 +78,35 @@ enum uiDrawFillMode {
 	uiDrawFillModeAlternate,
 };
 
+struct uiDrawBrush {
+	uiDrawBrushType Type;
+
+	// solid brushes
+	double R;
+	double G;
+	double B;
+	double A;
+
+	// gradient brushes
+	double X0;		// linear: start X, radial: start X
+	double Y0;		// linear: start Y, radial: start Y
+	double X1;		// linear: end X, radial: outer circle center X
+	double Y1;		// linear: end Y, radial: outer circle center Y
+	double OuterRadius;		// radial gradients only
+	uiDrawBrushGradientStop *Stops;
+	size_t NumStops;
+
+	// TODO images
+};
+
+struct uiDrawBrushGradientStop {
+	double Pos;
+	double R;
+	double G;
+	double B;
+	double A;
+};
+
 struct uiDrawStrokeParams {
 	uiDrawLineCap Cap;
 	uiDrawLineJoin Join;
@@ -91,8 +131,8 @@ void uiDrawPathAddRectangle(uiDrawPath *, double, double, double, double);
 
 void uiDrawPathEnd(uiDrawPath *);
 
-void uiDrawStroke(uiDrawContext *, uiDrawPath *, uiDrawStrokeParams *);
-void uiDrawFill(uiDrawContext *, uiDrawPath *);
+void uiDrawStroke(uiDrawContext *, uiDrawPath *, uiDrawBrush *, uiDrawStrokeParams *);
+void uiDrawFill(uiDrawContext *, uiDrawPath *, uiDrawBrush *);
 
 // TODO primitives:
 // - rounded rectangles