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85b5df42a7
wine/dlls/gdiplus/graphics.c
Evan Stade 85b5df42a7 gdiplus: Added rendering of custom line caps.
2007-07-20 11:53:40 +02:00

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/*
* Copyright (C) 2007 Google (Evan Stade)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <math.h>
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "wingdi.h"
#include "gdiplus.h"
#include "gdiplus_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
/* looks-right constants */
#define TENSION_CONST (0.3)
#define ANCHOR_WIDTH (2.0)
#define MAX_ITERS (50)
/* Converts angle (in degrees) to x/y coordinates */
static void deg2xy(REAL angle, REAL x_0, REAL y_0, REAL *x, REAL *y)
{
REAL radAngle, hypotenuse;
radAngle = deg2rad(angle);
hypotenuse = 50.0; /* arbitrary */
*x = x_0 + cos(radAngle) * hypotenuse;
*y = y_0 + sin(radAngle) * hypotenuse;
}
/* Converts from gdiplus path point type to gdi path point type. */
static BYTE convert_path_point_type(BYTE type)
{
BYTE ret;
switch(type & PathPointTypePathTypeMask){
case PathPointTypeBezier:
ret = PT_BEZIERTO;
break;
case PathPointTypeLine:
ret = PT_LINETO;
break;
case PathPointTypeStart:
ret = PT_MOVETO;
break;
default:
ERR("Bad point type\n");
return 0;
}
if(type & PathPointTypeCloseSubpath)
ret |= PT_CLOSEFIGURE;
return ret;
}
/* GdipDrawPie/GdipFillPie helper function */
static GpStatus draw_pie(GpGraphics *graphics, HBRUSH gdibrush, HPEN gdipen,
REAL x, REAL y, REAL width, REAL height, REAL startAngle, REAL sweepAngle)
{
INT save_state;
REAL x_0, y_0, x_1, y_1, x_2, y_2;
if(!graphics)
return InvalidParameter;
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, gdipen);
SelectObject(graphics->hdc, gdibrush);
x_0 = x + (width/2.0);
y_0 = y + (height/2.0);
deg2xy(startAngle+sweepAngle, x_0, y_0, &x_1, &y_1);
deg2xy(startAngle, x_0, y_0, &x_2, &y_2);
Pie(graphics->hdc, roundr(x), roundr(y), roundr(x+width), roundr(y+height),
roundr(x_1), roundr(y_1), roundr(x_2), roundr(y_2));
RestoreDC(graphics->hdc, save_state);
return Ok;
}
/* GdipDrawCurve helper function.
* Calculates Bezier points from cardinal spline points. */
static void calc_curve_bezier(CONST GpPointF *pts, REAL tension, REAL *x1,
REAL *y1, REAL *x2, REAL *y2)
{
REAL xdiff, ydiff;
/* calculate tangent */
xdiff = pts[2].X - pts[0].X;
ydiff = pts[2].Y - pts[0].Y;
/* apply tangent to get control points */
*x1 = pts[1].X - tension * xdiff;
*y1 = pts[1].Y - tension * ydiff;
*x2 = pts[1].X + tension * xdiff;
*y2 = pts[1].Y + tension * ydiff;
}
/* GdipDrawCurve helper function.
* Calculates Bezier points from cardinal spline endpoints. */
static void calc_curve_bezier_endp(REAL xend, REAL yend, REAL xadj, REAL yadj,
REAL tension, REAL *x, REAL *y)
{
/* tangent at endpoints is the line from the endpoint to the adjacent point */
*x = roundr(tension * (xadj - xend) + xend);
*y = roundr(tension * (yadj - yend) + yend);
}
/* Draws the linecap the specified color and size on the hdc. The linecap is in
* direction of the line from x1, y1 to x2, y2 and is anchored on x2, y2. */
static void draw_cap(HDC hdc, COLORREF color, GpLineCap cap, REAL size,
const GpCustomLineCap *custom, REAL x1, REAL y1, REAL x2, REAL y2)
{
HGDIOBJ oldbrush, oldpen;
GpMatrix *matrix = NULL;
HBRUSH brush;
HPEN pen;
PointF *custptf = NULL;
POINT pt[4], *custpt = NULL;
BYTE *tp = NULL;
REAL theta, dsmall, dbig, dx, dy;
INT i, count;
LOGBRUSH lb;
if(x2 != x1)
theta = atan2(y2 - y1, x2 - x1);
else if(y2 != y1){
theta = M_PI_2 * (y2 > y1 ? 1.0 : -1.0);
}
else
return;
brush = CreateSolidBrush(color);
lb.lbStyle = BS_SOLID;
lb.lbColor = color;
lb.lbHatch = 0;
pen = ExtCreatePen(PS_GEOMETRIC | PS_SOLID | PS_ENDCAP_FLAT,
(cap == LineCapCustom ? size : 1), &lb, 0, NULL);
oldbrush = SelectObject(hdc, brush);
oldpen = SelectObject(hdc, pen);
switch(cap){
case LineCapFlat:
break;
case LineCapSquare:
case LineCapSquareAnchor:
case LineCapDiamondAnchor:
size = size * (cap & LineCapNoAnchor ? ANCHOR_WIDTH : 1.0) / 2.0;
if(cap == LineCapDiamondAnchor){
dsmall = cos(theta + M_PI_2) * size;
dbig = sin(theta + M_PI_2) * size;
}
else{
dsmall = cos(theta + M_PI_4) * size;
dbig = sin(theta + M_PI_4) * size;
}
/* calculating the latter points from the earlier points makes them
* look a little better because of rounding issues */
pt[0].x = roundr(x2 - dsmall);
pt[1].x = roundr(((REAL)pt[0].x) + dbig + dsmall);
pt[0].y = roundr(y2 - dbig);
pt[3].y = roundr(((REAL)pt[0].y) + dsmall + dbig);
pt[1].y = roundr(y2 - dsmall);
pt[2].y = roundr(dbig + dsmall + ((REAL)pt[1].y));
pt[3].x = roundr(x2 - dbig);
pt[2].x = roundr(((REAL)pt[3].x) + dsmall + dbig);
Polygon(hdc, pt, 4);
break;
case LineCapArrowAnchor:
size = size * 4.0 / sqrt(3.0);
dx = cos(M_PI / 6.0 + theta) * size;
dy = sin(M_PI / 6.0 + theta) * size;
pt[0].x = roundr(x2 - dx);
pt[0].y = roundr(y2 - dy);
dx = cos(- M_PI / 6.0 + theta) * size;
dy = sin(- M_PI / 6.0 + theta) * size;
pt[1].x = roundr(x2 - dx);
pt[1].y = roundr(y2 - dy);
pt[2].x = roundr(x2);
pt[2].y = roundr(y2);
Polygon(hdc, pt, 3);
break;
case LineCapRoundAnchor:
dx = dy = ANCHOR_WIDTH * size / 2.0;
x2 = (REAL) roundr(x2 - dx);
y2 = (REAL) roundr(y2 - dy);
Ellipse(hdc, (INT) x2, (INT) y2, roundr(x2 + 2.0 * dx),
roundr(y2 + 2.0 * dy));
break;
case LineCapTriangle:
size = size / 2.0;
dx = cos(M_PI_2 + theta) * size;
dy = sin(M_PI_2 + theta) * size;
/* Using roundr here can make the triangle float off the end of the
* line. */
pt[0].x = ((x2 - x1) >= 0 ? floorf(x2 - dx) : ceilf(x2 - dx));
pt[0].y = ((y2 - y1) >= 0 ? floorf(y2 - dy) : ceilf(y2 - dy));
pt[1].x = roundr(pt[0].x + 2.0 * dx);
pt[1].y = roundr(pt[0].y + 2.0 * dy);
dx = cos(theta) * size;
dy = sin(theta) * size;
pt[2].x = roundr(x2 + dx);
pt[2].y = roundr(y2 + dy);
Polygon(hdc, pt, 3);
break;
case LineCapRound:
dx = -cos(M_PI_2 + theta) * size;
dy = -sin(M_PI_2 + theta) * size;
pt[0].x = ((x2 - x1) >= 0 ? floorf(x2 - dx) : ceilf(x2 - dx));
pt[0].y = ((y2 - y1) >= 0 ? floorf(y2 - dy) : ceilf(y2 - dy));
pt[1].x = roundr(pt[0].x + 2.0 * dx);
pt[1].y = roundr(pt[0].y + 2.0 * dy);
dx = dy = size / 2.0;
x2 = (REAL) roundr(x2 - dx);
y2 = (REAL) roundr(y2 - dy);
Pie(hdc, (INT) x2, (INT) y2, roundr(x2 + 2.0 * dx),
roundr(y2 + 2.0 * dy), pt[0].x, pt[0].y, pt[1].x, pt[1].y);
break;
case LineCapCustom:
if(!custom)
break;
if(custom->fill){
FIXME("fill-path custom line caps not implemented\n");
break;
}
count = custom->pathdata.Count;
custptf = GdipAlloc(count * sizeof(PointF));
custpt = GdipAlloc(count * sizeof(POINT));
tp = GdipAlloc(count);
if(!custptf || !custpt || !tp || (GdipCreateMatrix(&matrix) != Ok))
goto custend;
memcpy(custptf, custom->pathdata.Points, count * sizeof(PointF));
GdipScaleMatrix(matrix, size, size, MatrixOrderAppend);
GdipRotateMatrix(matrix, (180.0 / M_PI) * (theta - M_PI_2),
MatrixOrderAppend);
GdipTranslateMatrix(matrix, x2, y2, MatrixOrderAppend);
GdipTransformMatrixPoints(matrix, custptf, count);
for(i = 0; i < count; i++){
custpt[i].x = roundr(custptf[i].X);
custpt[i].y = roundr(custptf[i].Y);
tp[i] = convert_path_point_type(custom->pathdata.Types[i]);
}
PolyDraw(hdc, custpt, tp, count);
custend:
GdipFree(custptf);
GdipFree(custpt);
GdipFree(tp);
GdipDeleteMatrix(matrix);
break;
default:
break;
}
SelectObject(hdc, oldbrush);
SelectObject(hdc, oldpen);
DeleteObject(brush);
DeleteObject(pen);
}
/* Shortens the line by the given percent by changing x2, y2.
* If percent is > 1.0 then the line will change direction. */
static void shorten_line_percent(REAL x1, REAL y1, REAL *x2, REAL *y2, REAL percent)
{
REAL dist, theta, dx, dy;
if((y1 == *y2) && (x1 == *x2))
return;
dist = sqrt((*x2 - x1) * (*x2 - x1) + (*y2 - y1) * (*y2 - y1)) * percent;
theta = (*x2 == x1 ? M_PI_2 : atan((*y2 - y1) / (*x2 - x1)));
dx = cos(theta) * dist;
dy = sin(theta) * dist;
*x2 = *x2 + fabs(dx) * (*x2 > x1 ? -1.0 : 1.0);
*y2 = *y2 + fabs(dy) * (*y2 > y1 ? -1.0 : 1.0);
}
/* Shortens the line by the given amount by changing x2, y2.
* If the amount is greater than the distance, the line will become length 0. */
static void shorten_line_amt(REAL x1, REAL y1, REAL *x2, REAL *y2, REAL amt)
{
REAL dx, dy, percent;
dx = *x2 - x1;
dy = *y2 - y1;
if(dx == 0 && dy == 0)
return;
percent = amt / sqrt(dx * dx + dy * dy);
if(percent >= 1.0){
*x2 = x1;
*y2 = y1;
return;
}
shorten_line_percent(x1, y1, x2, y2, percent);
}
/* Draws lines between the given points, and if caps is true then draws an endcap
* at the end of the last line. FIXME: Startcaps not implemented. */
static GpStatus draw_polyline(HDC hdc, GpPen *pen, GDIPCONST GpPointF * pt,
INT count, BOOL caps)
{
POINT *pti;
REAL x = pt[count - 1].X, y = pt[count - 1].Y;
INT i;
GpStatus status = GenericError;
if(!count)
return Ok;
pti = GdipAlloc(count * sizeof(POINT));
if(!pti){
status = OutOfMemory;
goto end;
}
if(caps){
if(pen->endcap == LineCapArrowAnchor)
shorten_line_amt(pt[count-2].X, pt[count-2].Y, &x, &y, pen->width);
draw_cap(hdc, pen->color, pen->endcap, pen->width, pen->customend,
pt[count-2].X, pt[count-2].Y, pt[count - 1].X, pt[count - 1].Y);
}
for(i = 0; i < count - 1; i ++){
pti[i].x = roundr(pt[i].X);
pti[i].y = roundr(pt[i].Y);
}
pti[i].x = roundr(x);
pti[i].y = roundr(y);
Polyline(hdc, pti, count);
end:
GdipFree(pti);
return status;
}
/* Conducts a linear search to find the bezier points that will back off
* the endpoint of the curve by a distance of amt. Linear search works
* better than binary in this case because there are multiple solutions,
* and binary searches often find a bad one. I don't think this is what
* Windows does but short of rendering the bezier without GDI's help it's
* the best we can do. */
static void shorten_bezier_amt(GpPointF * pt, REAL amt)
{
GpPointF origpt[4];
REAL percent = 0.00, dx, dy, origx = pt[3].X, origy = pt[3].Y, diff = -1.0;
INT i;
memcpy(origpt, pt, sizeof(GpPointF) * 4);
for(i = 0; (i < MAX_ITERS) && (diff < amt); i++){
/* reset bezier points to original values */
memcpy(pt, origpt, sizeof(GpPointF) * 4);
/* Perform magic on bezier points. Order is important here.*/
shorten_line_percent(pt[2].X, pt[2].Y, &pt[3].X, &pt[3].Y, percent);
shorten_line_percent(pt[1].X, pt[1].Y, &pt[2].X, &pt[2].Y, percent);
shorten_line_percent(pt[2].X, pt[2].Y, &pt[3].X, &pt[3].Y, percent);
shorten_line_percent(pt[0].X, pt[0].Y, &pt[1].X, &pt[1].Y, percent);
shorten_line_percent(pt[1].X, pt[1].Y, &pt[2].X, &pt[2].Y, percent);
shorten_line_percent(pt[2].X, pt[2].Y, &pt[3].X, &pt[3].Y, percent);
dx = pt[3].X - origx;
dy = pt[3].Y - origy;
diff = sqrt(dx * dx + dy * dy);
percent += 0.0005 * amt;
}
}
/* Draws bezier curves between given points, and if caps is true then draws an
* endcap at the end of the last line. FIXME: Startcaps not implemented. */
static GpStatus draw_polybezier(HDC hdc, GpPen *pen, GDIPCONST GpPointF * pt,
INT count, BOOL caps)
{
POINT *pti;
GpPointF *ptf;
INT i;
GpStatus status = GenericError;
if(!count)
return Ok;
pti = GdipAlloc(count * sizeof(POINT));
ptf = GdipAlloc(4 * sizeof(GpPointF));
if(!pti || !ptf){
status = OutOfMemory;
goto end;
}
memcpy(ptf, &pt[count-4], 4 * sizeof(GpPointF));
if(caps){
if(pen->endcap == LineCapArrowAnchor)
shorten_bezier_amt(ptf, pen->width);
/* the direction of the line cap is parallel to the direction at the
* end of the bezier (which, if it has been shortened, is not the same
* as the direction from pt[count-2] to pt[count-1]) */
draw_cap(hdc, pen->color, pen->endcap, pen->width, pen->customend,
pt[count - 1].X - (ptf[3].X - ptf[2].X),
pt[count - 1].Y - (ptf[3].Y - ptf[2].Y),
pt[count - 1].X, pt[count - 1].Y);
}
for(i = 0; i < count - 4; i ++){
pti[i].x = roundr(pt[i].X);
pti[i].y = roundr(pt[i].Y);
}
for(i = 0; i < 4; i ++){
pti[i + count - 4].x = roundr(ptf[i].X);
pti[i + count - 4].y = roundr(ptf[i].Y);
}
PolyBezier(hdc, pti, count);
status = Ok;
end:
GdipFree(pti);
GdipFree(ptf);
return status;
}
/* Draws a combination of bezier curves and lines between points. */
static GpStatus draw_poly(HDC hdc, GpPen *pen, GDIPCONST GpPointF * pt,
GDIPCONST BYTE * types, INT count, BOOL caps)
{
POINT *pti = GdipAlloc(count * sizeof(POINT));
BYTE *tp = GdipAlloc(count);
GpPointF *ptf = NULL;
REAL x = pt[count - 1].X, y = pt[count - 1].Y;
INT i;
GpStatus status = GenericError;
if(!count){
status = Ok;
goto end;
}
if(!pti || !tp){
status = OutOfMemory;
goto end;
}
for(i = 0; i < count; i++){
if((types[i] & PathPointTypePathTypeMask) == PathPointTypeBezier){
if((i + 2 >= count) || !(types[i + 1] & PathPointTypeBezier)
|| !(types[i + 1] & PathPointTypeBezier)){
ERR("Bad bezier points\n");
goto end;
}
i += 2;
}
}
for(i = 0; i < count; i++){
pti[i].x = roundr(pt[i].X);
pti[i].y = roundr(pt[i].Y);
}
/* If we are drawing caps, go through the points and adjust them accordingly,
* and draw the caps. */
if(caps){
switch(types[count - 1] & PathPointTypePathTypeMask){
case PathPointTypeBezier:
ptf = GdipAlloc(4 * sizeof(GpPointF));
if(!ptf){
status = OutOfMemory;
goto end;
}
memcpy(ptf, &pt[count - 4], 4 * sizeof(GpPointF));
if(pen->endcap == LineCapArrowAnchor)
shorten_bezier_amt(ptf, pen->width);
draw_cap(hdc, pen->color, pen->endcap, pen->width, pen->customend,
pt[count - 1].X - (ptf[3].X - ptf[2].X),
pt[count - 1].Y - (ptf[3].Y - ptf[2].Y),
pt[count - 1].X, pt[count - 1].Y);
for(i = 0; i < 4; i++){
pti[i + count - 4].x = roundr(ptf[i].X);
pti[i + count - 4].y = roundr(ptf[i].Y);
}
break;
case PathPointTypeLine:
if(pen->endcap == LineCapArrowAnchor)
shorten_line_amt(pt[count - 2].X, pt[count - 2].Y, &x, &y,
pen->width);
draw_cap(hdc, pen->color, pen->endcap, pen->width, pen->customend,
pt[count - 2].X, pt[count - 2].Y, pt[count - 1].X,
pt[count - 1].Y);
pti[count - 1].x = roundr(x);
pti[count - 1].y = roundr(y);
break;
default:
ERR("Bad path last point\n");
goto end;
}
}
for(i = 0; i < count; i++){
tp[i] = convert_path_point_type(types[i]);
}
PolyDraw(hdc, pti, tp, count);
status = Ok;
end:
GdipFree(pti);
GdipFree(ptf);
GdipFree(tp);
return status;
}
GpStatus WINGDIPAPI GdipCreateFromHDC(HDC hdc, GpGraphics **graphics)
{
if(hdc == NULL)
return OutOfMemory;
if(graphics == NULL)
return InvalidParameter;
*graphics = GdipAlloc(sizeof(GpGraphics));
if(!*graphics) return OutOfMemory;
(*graphics)->hdc = hdc;
(*graphics)->hwnd = NULL;
(*graphics)->smoothing = SmoothingModeDefault;
(*graphics)->compqual = CompositingQualityDefault;
(*graphics)->interpolation = InterpolationModeDefault;
(*graphics)->pixeloffset = PixelOffsetModeDefault;
return Ok;
}
GpStatus WINGDIPAPI GdipCreateFromHWND(HWND hwnd, GpGraphics **graphics)
{
GpStatus ret;
if((ret = GdipCreateFromHDC(GetDC(hwnd), graphics)) != Ok)
return ret;
(*graphics)->hwnd = hwnd;
return Ok;
}
GpStatus WINGDIPAPI GdipDeleteGraphics(GpGraphics *graphics)
{
if(!graphics) return InvalidParameter;
if(graphics->hwnd)
ReleaseDC(graphics->hwnd, graphics->hdc);
HeapFree(GetProcessHeap(), 0, graphics);
return Ok;
}
GpStatus WINGDIPAPI GdipDrawArc(GpGraphics *graphics, GpPen *pen, REAL x,
REAL y, REAL width, REAL height, REAL startAngle, REAL sweepAngle)
{
INT save_state, num_pts;
GpPointF points[MAX_ARC_PTS];
GpStatus retval;
if(!graphics || !pen)
return InvalidParameter;
num_pts = arc2polybezier(points, x, y, width, height, startAngle, sweepAngle);
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, pen->gdipen);
retval = draw_polybezier(graphics->hdc, pen, points, num_pts, TRUE);
RestoreDC(graphics->hdc, save_state);
return retval;
}
GpStatus WINGDIPAPI GdipDrawBezier(GpGraphics *graphics, GpPen *pen, REAL x1,
REAL y1, REAL x2, REAL y2, REAL x3, REAL y3, REAL x4, REAL y4)
{
INT save_state;
GpPointF pt[4];
GpStatus retval;
if(!graphics || !pen)
return InvalidParameter;
pt[0].X = x1;
pt[0].Y = y1;
pt[1].X = x2;
pt[1].Y = y2;
pt[2].X = x3;
pt[2].Y = y3;
pt[3].X = x4;
pt[3].Y = y4;
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, pen->gdipen);
retval = draw_polybezier(graphics->hdc, pen, pt, 4, TRUE);
RestoreDC(graphics->hdc, save_state);
return retval;
}
/* Approximates cardinal spline with Bezier curves. */
GpStatus WINGDIPAPI GdipDrawCurve2(GpGraphics *graphics, GpPen *pen,
GDIPCONST GpPointF *points, INT count, REAL tension)
{
/* PolyBezier expects count*3-2 points. */
INT i, len_pt = count*3-2, save_state;
GpPointF *pt;
REAL x1, x2, y1, y2;
GpStatus retval;
if(!graphics || !pen)
return InvalidParameter;
pt = GdipAlloc(len_pt * sizeof(GpPointF));
tension = tension * TENSION_CONST;
calc_curve_bezier_endp(points[0].X, points[0].Y, points[1].X, points[1].Y,
tension, &x1, &y1);
pt[0].X = points[0].X;
pt[0].Y = points[0].Y;
pt[1].X = x1;
pt[1].Y = y1;
for(i = 0; i < count-2; i++){
calc_curve_bezier(&(points[i]), tension, &x1, &y1, &x2, &y2);
pt[3*i+2].X = x1;
pt[3*i+2].Y = y1;
pt[3*i+3].X = points[i+1].X;
pt[3*i+3].Y = points[i+1].Y;
pt[3*i+4].X = x2;
pt[3*i+4].Y = y2;
}
calc_curve_bezier_endp(points[count-1].X, points[count-1].Y,
points[count-2].X, points[count-2].Y, tension, &x1, &y1);
pt[len_pt-2].X = x1;
pt[len_pt-2].Y = y1;
pt[len_pt-1].X = points[count-1].X;
pt[len_pt-1].Y = points[count-1].Y;
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, pen->gdipen);
retval = draw_polybezier(graphics->hdc, pen, pt, len_pt, TRUE);
GdipFree(pt);
RestoreDC(graphics->hdc, save_state);
return retval;
}
GpStatus WINGDIPAPI GdipDrawLineI(GpGraphics *graphics, GpPen *pen, INT x1,
INT y1, INT x2, INT y2)
{
INT save_state;
GpPointF pt[2];
GpStatus retval;
if(!pen || !graphics)
return InvalidParameter;
pt[0].X = (REAL)x1;
pt[0].Y = (REAL)y1;
pt[1].X = (REAL)x2;
pt[1].Y = (REAL)y2;
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, pen->gdipen);
retval = draw_polyline(graphics->hdc, pen, pt, 2, TRUE);
RestoreDC(graphics->hdc, save_state);
return retval;
}
GpStatus WINGDIPAPI GdipDrawLines(GpGraphics *graphics, GpPen *pen, GDIPCONST
GpPointF *points, INT count)
{
INT save_state;
GpStatus retval;
if(!pen || !graphics || (count < 2))
return InvalidParameter;
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, pen->gdipen);
retval = draw_polyline(graphics->hdc, pen, points, count, TRUE);
RestoreDC(graphics->hdc, save_state);
return retval;
}
GpStatus WINGDIPAPI GdipDrawPath(GpGraphics *graphics, GpPen *pen, GpPath *path)
{
INT save_state;
GpStatus retval;
if(!pen || !graphics)
return InvalidParameter;
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, pen->gdipen);
retval = draw_poly(graphics->hdc, pen, path->pathdata.Points,
path->pathdata.Types, path->pathdata.Count, TRUE);
RestoreDC(graphics->hdc, save_state);
return retval;
}
GpStatus WINGDIPAPI GdipDrawPie(GpGraphics *graphics, GpPen *pen, REAL x,
REAL y, REAL width, REAL height, REAL startAngle, REAL sweepAngle)
{
if(!pen)
return InvalidParameter;
return draw_pie(graphics, GetStockObject(NULL_BRUSH), pen->gdipen, x, y,
width, height, startAngle, sweepAngle);
}
GpStatus WINGDIPAPI GdipDrawRectangleI(GpGraphics *graphics, GpPen *pen, INT x,
INT y, INT width, INT height)
{
INT save_state;
if(!pen || !graphics)
return InvalidParameter;
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, pen->gdipen);
SelectObject(graphics->hdc, GetStockObject(NULL_BRUSH));
Rectangle(graphics->hdc, x, y, x + width, y + height);
RestoreDC(graphics->hdc, save_state);
return Ok;
}
GpStatus WINGDIPAPI GdipFillPath(GpGraphics *graphics, GpBrush *brush, GpPath *path)
{
INT save_state;
GpStatus retval;
if(!brush || !graphics || !path)
return InvalidParameter;
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, brush->gdibrush);
SetPolyFillMode(graphics->hdc, (path->fill == FillModeAlternate ? ALTERNATE
: WINDING));
BeginPath(graphics->hdc);
retval = draw_poly(graphics->hdc, NULL, path->pathdata.Points,
path->pathdata.Types, path->pathdata.Count, FALSE);
if(retval != Ok)
goto end;
EndPath(graphics->hdc);
FillPath(graphics->hdc);
retval = Ok;
end:
RestoreDC(graphics->hdc, save_state);
return retval;
}
GpStatus WINGDIPAPI GdipFillPie(GpGraphics *graphics, GpBrush *brush, REAL x,
REAL y, REAL width, REAL height, REAL startAngle, REAL sweepAngle)
{
if(!brush)
return InvalidParameter;
return draw_pie(graphics, brush->gdibrush, GetStockObject(NULL_PEN), x, y,
width, height, startAngle, sweepAngle);
}
/* FIXME: Compositing quality is not used anywhere except the getter/setter. */
GpStatus WINGDIPAPI GdipGetCompositingQuality(GpGraphics *graphics,
CompositingQuality *quality)
{
if(!graphics || !quality)
return InvalidParameter;
*quality = graphics->compqual;
return Ok;
}
/* FIXME: Interpolation mode is not used anywhere except the getter/setter. */
GpStatus WINGDIPAPI GdipGetInterpolationMode(GpGraphics *graphics,
InterpolationMode *mode)
{
if(!graphics || !mode)
return InvalidParameter;
*mode = graphics->interpolation;
return Ok;
}
/* FIXME: Pixel offset mode is not used anywhere except the getter/setter. */
GpStatus WINGDIPAPI GdipGetPixelOffsetMode(GpGraphics *graphics, PixelOffsetMode
*mode)
{
if(!graphics || !mode)
return InvalidParameter;
*mode = graphics->pixeloffset;
return Ok;
}
/* FIXME: Smoothing mode is not used anywhere except the getter/setter. */
GpStatus WINGDIPAPI GdipGetSmoothingMode(GpGraphics *graphics, SmoothingMode *mode)
{
if(!graphics || !mode)
return InvalidParameter;
*mode = graphics->smoothing;
return Ok;
}
GpStatus WINGDIPAPI GdipRestoreGraphics(GpGraphics *graphics, GraphicsState state)
{
if(!graphics)
return InvalidParameter;
FIXME("graphics state not implemented\n");
return NotImplemented;
}
GpStatus WINGDIPAPI GdipSaveGraphics(GpGraphics *graphics, GraphicsState *state)
{
if(!graphics || !state)
return InvalidParameter;
FIXME("graphics state not implemented\n");
return NotImplemented;
}
GpStatus WINGDIPAPI GdipSetCompositingQuality(GpGraphics *graphics,
CompositingQuality quality)
{
if(!graphics)
return InvalidParameter;
graphics->compqual = quality;
return Ok;
}
GpStatus WINGDIPAPI GdipSetInterpolationMode(GpGraphics *graphics,
InterpolationMode mode)
{
if(!graphics)
return InvalidParameter;
graphics->interpolation = mode;
return Ok;
}
GpStatus WINGDIPAPI GdipSetPixelOffsetMode(GpGraphics *graphics, PixelOffsetMode
mode)
{
if(!graphics)
return InvalidParameter;
graphics->pixeloffset = mode;
return Ok;
}
GpStatus WINGDIPAPI GdipSetSmoothingMode(GpGraphics *graphics, SmoothingMode mode)
{
if(!graphics)
return InvalidParameter;
graphics->smoothing = mode;
return Ok;
}
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