libui/test/drawtests.c

// 9 october 2015
#include "test.h"

struct drawtest {
	const char *name;
	void (*draw)(uiAreaDrawParams *p);
	// TODO mouse event
};

static void drawOriginal(uiAreaDrawParams *p)
{
	uiDrawPath *path;
	uiDrawBrush brush;
	uiDrawStrokeParams sp;

	brush.Type = uiDrawBrushTypeSolid;
	brush.A = 1;

	brush.R = 1;
	brush.G = 0;
	brush.B = 0;
	path = uiDrawNewPath(uiDrawFillModeWinding);
	uiDrawPathNewFigure(path, p->ClipX + 5, p->ClipY + 5);
	uiDrawPathLineTo(path, (p->ClipX + p->ClipWidth) - 5, (p->ClipY + p->ClipHeight) - 5);
	uiDrawPathEnd(path);
	sp.Cap = uiDrawLineCapFlat;
	sp.Join = uiDrawLineJoinMiter;
	sp.Thickness = 1;
	sp.MiterLimit = uiDrawDefaultMiterLimit;
	uiDrawStroke(p->Context, path, &brush, &sp);
	uiDrawFreePath(path);

	brush.R = 0;
	brush.G = 0;
	brush.B = 0.75;
	path = uiDrawNewPath(uiDrawFillModeWinding);
	uiDrawPathNewFigure(path, p->ClipX, p->ClipY);
	uiDrawPathLineTo(path, p->ClipX + p->ClipWidth, p->ClipY);
	uiDrawPathLineTo(path, 50, 150);
	uiDrawPathLineTo(path, 50, 50);
	uiDrawPathCloseFigure(path);
	uiDrawPathEnd(path);
	sp.Cap = uiDrawLineCapFlat;
	sp.Join = uiDrawLineJoinRound;
	sp.Thickness = 5;
	uiDrawStroke(p->Context, path, &brush, &sp);
	uiDrawFreePath(path);

	brush.R = 0;
	brush.G = 0.75;
	brush.B = 0;
	brush.A = 0.5;
	path = uiDrawNewPath(uiDrawFillModeWinding);
	uiDrawPathAddRectangle(path, 120, 80, 50, 50);
	uiDrawPathEnd(path);
	uiDrawFill(p->Context, path, &brush);
	uiDrawFreePath(path);
	brush.A = 1;

	brush.R = 0;
	brush.G = 0.5;
	brush.B = 0;
	path = uiDrawNewPath(uiDrawFillModeWinding);
	uiDrawPathNewFigure(path, 5.5, 10.5);
	uiDrawPathLineTo(path, 5.5, 50.5);
	uiDrawPathEnd(path);
	sp.Cap = uiDrawLineCapFlat;
	sp.Join = uiDrawLineJoinMiter;
	sp.Thickness = 1;
	sp.MiterLimit = uiDrawDefaultMiterLimit;
	uiDrawStroke(p->Context, path, &brush, &sp);
	uiDrawFreePath(path);

	brush.R = 0.5;
	brush.G = 0.75;
	brush.B = 0;
	path = uiDrawNewPath(uiDrawFillModeWinding);
	uiDrawPathNewFigure(path, 400, 100);
	uiDrawPathArcTo(path,
		400, 100,
		50,
		30. * (M_PI / 180.),
		// note the end angle here
		// in GDI, the second angle to AngleArc() is relative to the start, not to 0
		330. * (M_PI / 180.));
	// TODO add a checkbox for this
	uiDrawPathLineTo(path, 400, 100);
	uiDrawPathNewFigureWithArc(path,
		510, 100,
		50,
		30. * (M_PI / 180.),
		330. * (M_PI / 180.));
	uiDrawPathCloseFigure(path);
	uiDrawPathEnd(path);
	sp.Cap = uiDrawLineCapFlat;
	sp.Join = uiDrawLineJoinMiter;
	sp.Thickness = 1;
	sp.MiterLimit = uiDrawDefaultMiterLimit;
	uiDrawStroke(p->Context, path, &brush, &sp);
	uiDrawFreePath(path);

	brush.R = 0;
	brush.G = 0.5;
	brush.B = 0.75;
	path = uiDrawNewPath(uiDrawFillModeWinding);
	uiDrawPathNewFigure(path, 300, 300);
	uiDrawPathBezierTo(path,
		350, 320,
		310, 390,
		435, 372);
	uiDrawPathEnd(path);
	sp.Cap = uiDrawLineCapFlat;
	sp.Join = uiDrawLineJoinMiter;
	sp.Thickness = 1;
	sp.MiterLimit = uiDrawDefaultMiterLimit;
	uiDrawStroke(p->Context, path, &brush, &sp);
	uiDrawFreePath(path);

	// based on https://msdn.microsoft.com/en-us/library/windows/desktop/dd756682%28v=vs.85%29.aspx
	path = uiDrawNewPath(uiDrawFillModeWinding);
#define XO 50
#define YO 250
	uiDrawPathNewFigure(path, 0 + XO, 0 + YO);
	uiDrawPathLineTo(path, 200 + XO, 0 + YO);
	uiDrawPathBezierTo(path,
		150 + XO, 50 + YO,
		150 + XO, 150 + YO,
		200 + XO, 200 + YO);
	uiDrawPathLineTo(path, 0 + XO, 200 + YO);
	uiDrawPathBezierTo(path,
		50 + XO, 150 + YO,
		50 + XO, 50 + YO,
		0 + XO, 0 + YO);
	uiDrawPathCloseFigure(path);
	uiDrawPathEnd(path);
	// first the stroke
	brush.Type = uiDrawBrushTypeSolid;
	brush.R = 0;
	brush.G = 0;
	brush.B = 0;
	brush.A = 1;
	sp.Cap = uiDrawLineCapFlat;
	sp.Join = uiDrawLineJoinMiter;
	sp.MiterLimit = uiDrawDefaultMiterLimit;
	sp.Thickness = 10;
	uiDrawStroke(p->Context, path, &brush, &sp);
	// and now the fill
	{
		uiDrawBrushGradientStop stops[2];

		stops[0].Pos = 0.0;
		stops[0].R = 0.0;
		stops[0].G = 1.0;
		stops[0].B = 1.0;
		stops[0].A = 0.25;
		stops[1].Pos = 1.0;
		stops[1].R = 0.0;
		stops[1].G = 0.0;
		stops[1].B = 1.0;
		stops[1].A = 1.0;
		brush.Type = uiDrawBrushTypeLinearGradient;
		brush.X0 = 100 + XO;
		brush.Y0 = 0 + YO;
		brush.X1 = 100 + XO;
		brush.Y1 = 200 + YO;
		brush.Stops = stops;
		brush.NumStops = 2;
		uiDrawFill(p->Context, path, &brush);
	}
#undef YO
#undef XO
	uiDrawFreePath(path);

	// based on https://msdn.microsoft.com/en-us/library/windows/desktop/dd756679%28v=vs.85%29.aspx
	path = uiDrawNewPath(uiDrawFillModeWinding);
	uiDrawPathNewFigure(path, 585, 235);
	uiDrawPathArcTo(path,
		510, 235,
		75,
		0,
		// TODO why doesn't 360° work
		2 * M_PI - 0.1);
	uiDrawPathEnd(path);
	// first the stroke
	brush.Type = uiDrawBrushTypeSolid;
	brush.R = 0;
	brush.G = 0;
	brush.B = 0;
	brush.A = 1;
	sp.Cap = uiDrawLineCapFlat;
	sp.Join = uiDrawLineJoinMiter;
	sp.MiterLimit = uiDrawDefaultMiterLimit;
	sp.Thickness = 1;
	uiDrawStroke(p->Context, path, &brush, &sp);
	// then the fill
	{
		uiDrawBrushGradientStop stops[2];

		stops[0].Pos = 0.0;
		stops[0].R = 1.0;
		stops[0].G = 1.0;
		stops[0].B = 0.0;
		stops[0].A = 1.0;
		stops[1].Pos = 1.0;
		stops[1].R = ((double) 0x22) / 255.0;
		stops[1].G = ((double) 0x8B) / 255.0;
		stops[1].B = ((double) 0x22) / 255.0;
		stops[1].A = 1.0;
		brush.Type = uiDrawBrushTypeRadialGradient;
		// start point
		brush.X0 = 510;
		brush.Y0 = 235;
		// outer circle's center
		brush.X1 = 510;
		brush.Y1 = 235;
		brush.OuterRadius = 75;
		brush.Stops = stops;
		brush.NumStops = 2;
		uiDrawFill(p->Context, path, &brush);
	}
	uiDrawFreePath(path);
}

static const struct drawtest tests[] = {
	{ "Original uiArea test", drawOriginal },
	{ NULL, NULL },
};

void runDrawTest(intmax_t n, uiAreaDrawParams *p)
{
	(*(tests[n].draw))(p);
}

void populateComboboxWithTests(uiCombobox *c)
{
	size_t i;

	for (i = 0; test[i].name != NULL; i++)
		uiComboboxAppend(c, tests[i].name);
}