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wine/dlls/gdiplus/graphics.c
Evan Stade 021997fa63 gdiplus: Added GdipCreateMetafileFromWmf stub.
2007-07-25 13:52:43 +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;
}
static REAL convert_unit(HDC hdc, GpUnit unit)
{
switch(unit)
{
case UnitInch:
return (REAL) GetDeviceCaps(hdc, LOGPIXELSX);
case UnitPoint:
return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 72.0;
case UnitDocument:
return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 300.0;
case UnitMillimeter:
return ((REAL)GetDeviceCaps(hdc, LOGPIXELSX)) / 25.4;
case UnitWorld:
ERR("cannot convert UnitWorld\n");
return 0.0;
case UnitPixel:
case UnitDisplay:
default:
return 1.0;
}
}
static INT prepare_dc(GpGraphics *graphics, GpPen *pen)
{
HPEN gdipen;
REAL width;
INT save_state = SaveDC(graphics->hdc);
GpPointF pt[2];
EndPath(graphics->hdc);
/* Get an estimate for the amount the pen width is affected by the world
* transform. (This is similar to what some of the wine drivers do.) */
pt[0].X = 0.0;
pt[0].Y = 0.0;
pt[1].X = 1.0;
pt[1].Y = 1.0;
GdipTransformMatrixPoints(graphics->worldtrans, pt, 2);
width = sqrt((pt[1].X - pt[0].X) * (pt[1].X - pt[0].X) +
(pt[1].Y - pt[0].Y) * (pt[1].Y - pt[0].Y)) / sqrt(2.0);
width *= pen->width * convert_unit(graphics->hdc,
pen->unit == UnitWorld ? graphics->unit : pen->unit);
gdipen = ExtCreatePen(pen->style, roundr(width), &pen->brush->lb, 0, NULL);
SelectObject(graphics->hdc, gdipen);
return save_state;
}
static void restore_dc(GpGraphics *graphics, INT state)
{
DeleteObject(SelectObject(graphics->hdc, GetStockObject(NULL_PEN)));
RestoreDC(graphics->hdc, state);
}
/* This helper applies all the changes that the points listed in ptf need in
* order to be drawn on the device context. In the end, this should include at
* least:
* -scaling by page unit
* -applying world transformation
* -converting from float to int
* Native gdiplus uses gdi32 to do all this (via SetMapMode, SetViewportExtEx,
* SetWindowExtEx, SetWorldTransform, etc.) but we cannot because we are using
* gdi to draw, and these functions would irreparably mess with line widths.
*/
static void transform_and_round_points(GpGraphics *graphics, POINT *pti,
GpPointF *ptf, INT count)
{
REAL unitscale;
GpMatrix *matrix;
int i;
unitscale = convert_unit(graphics->hdc, graphics->unit);
/* apply page scale */
if(graphics->unit != UnitDisplay)
unitscale *= graphics->scale;
GdipCloneMatrix(graphics->worldtrans, &matrix);
GdipScaleMatrix(matrix, unitscale, unitscale, MatrixOrderAppend);
GdipTransformMatrixPoints(matrix, ptf, count);
for(i = 0; i < count; i++){
pti[i].x = roundr(ptf[i].X);
pti[i].y = roundr(ptf[i].Y);
}
}
/* GdipDrawPie/GdipFillPie helper function */
static void draw_pie(GpGraphics *graphics, REAL x, REAL y, REAL width,
REAL height, REAL startAngle, REAL sweepAngle)
{
GpPointF ptf[4];
POINT pti[4];
ptf[0].X = x;
ptf[0].Y = y;
ptf[1].X = x + width;
ptf[1].Y = y + height;
deg2xy(startAngle+sweepAngle, x + width / 2.0, y + width / 2.0, &ptf[2].X, &ptf[2].Y);
deg2xy(startAngle, x + width / 2.0, y + width / 2.0, &ptf[3].X, &ptf[3].Y);
transform_and_round_points(graphics, pti, ptf, 4);
Pie(graphics->hdc, pti[0].x, pti[0].y, pti[1].x, pti[1].y, pti[2].x,
pti[2].y, pti[3].x, pti[3].y);
}
/* 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. Probably
* should not be called on an hdc that has a path you care about. */
static void draw_cap(GpGraphics *graphics, COLORREF color, GpLineCap cap, REAL size,
const GpCustomLineCap *custom, REAL x1, REAL y1, REAL x2, REAL y2)
{
HGDIOBJ oldbrush = NULL, oldpen = NULL;
GpMatrix *matrix = NULL;
HBRUSH brush = NULL;
HPEN pen = NULL;
PointF ptf[4], *custptf = NULL;
POINT pt[4], *custpt = NULL;
BYTE *tp = NULL;
REAL theta, dsmall, dbig, dx, dy = 0.0;
INT i, count;
LOGBRUSH lb;
BOOL customstroke;
if((x1 == x2) && (y1 == y2))
return;
theta = gdiplus_atan2(y2 - y1, x2 - x1);
customstroke = (cap == LineCapCustom) && custom && (!custom->fill);
if(!customstroke){
brush = CreateSolidBrush(color);
lb.lbStyle = BS_SOLID;
lb.lbColor = color;
lb.lbHatch = 0;
pen = ExtCreatePen(PS_GEOMETRIC | PS_SOLID | PS_ENDCAP_FLAT |
PS_JOIN_MITER, 1, &lb, 0,
NULL);
oldbrush = SelectObject(graphics->hdc, brush);
oldpen = SelectObject(graphics->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;
}
ptf[0].X = x2 - dsmall;
ptf[1].X = x2 + dbig;
ptf[0].Y = y2 - dbig;
ptf[3].Y = y2 + dsmall;
ptf[1].Y = y2 - dsmall;
ptf[2].Y = y2 + dbig;
ptf[3].X = x2 - dbig;
ptf[2].X = x2 + dsmall;
transform_and_round_points(graphics, pt, ptf, 4);
Polygon(graphics->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;
ptf[0].X = x2 - dx;
ptf[0].Y = y2 - dy;
dx = cos(- M_PI / 6.0 + theta) * size;
dy = sin(- M_PI / 6.0 + theta) * size;
ptf[1].X = x2 - dx;
ptf[1].Y = y2 - dy;
ptf[2].X = x2;
ptf[2].Y = y2;
transform_and_round_points(graphics, pt, ptf, 3);
Polygon(graphics->hdc, pt, 3);
break;
case LineCapRoundAnchor:
dx = dy = ANCHOR_WIDTH * size / 2.0;
ptf[0].X = x2 - dx;
ptf[0].Y = y2 - dy;
ptf[1].X = x2 + dx;
ptf[1].Y = y2 + dy;
transform_and_round_points(graphics, pt, ptf, 2);
Ellipse(graphics->hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y);
break;
case LineCapTriangle:
size = size / 2.0;
dx = cos(M_PI_2 + theta) * size;
dy = sin(M_PI_2 + theta) * size;
ptf[0].X = x2 - dx;
ptf[0].Y = y2 - dy;
ptf[1].X = x2 + dx;
ptf[1].Y = y2 + dy;
dx = cos(theta) * size;
dy = sin(theta) * size;
ptf[2].X = x2 + dx;
ptf[2].Y = y2 + dy;
transform_and_round_points(graphics, pt, ptf, 3);
Polygon(graphics->hdc, pt, 3);
break;
case LineCapRound:
dx = dy = size / 2.0;
ptf[0].X = x2 - dx;
ptf[0].Y = y2 - dy;
ptf[1].X = x2 + dx;
ptf[1].Y = y2 + dy;
dx = -cos(M_PI_2 + theta) * size;
dy = -sin(M_PI_2 + theta) * size;
ptf[2].X = x2 - dx;
ptf[2].Y = y2 - dy;
ptf[3].X = x2 + dx;
ptf[3].Y = y2 + dy;
transform_and_round_points(graphics, pt, ptf, 4);
Pie(graphics->hdc, pt[0].x, pt[0].y, pt[1].x, pt[1].y, pt[2].x,
pt[2].y, pt[3].x, pt[3].y);
break;
case LineCapCustom:
if(!custom)
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);
transform_and_round_points(graphics, custpt, custptf, count);
for(i = 0; i < count; i++)
tp[i] = convert_path_point_type(custom->pathdata.Types[i]);
if(custom->fill){
BeginPath(graphics->hdc);
PolyDraw(graphics->hdc, custpt, tp, count);
EndPath(graphics->hdc);
StrokeAndFillPath(graphics->hdc);
}
else
PolyDraw(graphics->hdc, custpt, tp, count);
custend:
GdipFree(custptf);
GdipFree(custpt);
GdipFree(tp);
GdipDeleteMatrix(matrix);
break;
default:
break;
}
if(!customstroke){
SelectObject(graphics->hdc, oldbrush);
SelectObject(graphics->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.
* If percent is negative it can lengthen the line. */
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 = gdiplus_atan2((*y2 - y1), (*x2 - x1));
dx = cos(theta) * dist;
dy = sin(theta) * dist;
*x2 = *x2 + dx;
*y2 = *y2 + dy;
}
/* 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.
* If the amount is negative, it can lengthen the line. */
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(GpGraphics *graphics, GpPen *pen,
GDIPCONST GpPointF * pt, INT count, BOOL caps)
{
POINT *pti = NULL;
GpPointF *ptcopy = NULL;
GpStatus status = GenericError;
if(!count)
return Ok;
pti = GdipAlloc(count * sizeof(POINT));
ptcopy = GdipAlloc(count * sizeof(GpPointF));
if(!pti || !ptcopy){
status = OutOfMemory;
goto end;
}
memcpy(ptcopy, pt, count * sizeof(GpPointF));
if(caps){
if(pen->endcap == LineCapArrowAnchor)
shorten_line_amt(ptcopy[count-2].X, ptcopy[count-2].Y,
&ptcopy[count-1].X, &ptcopy[count-1].Y, pen->width);
else if((pen->endcap == LineCapCustom) && pen->customend)
shorten_line_amt(ptcopy[count-2].X, ptcopy[count-2].Y,
&ptcopy[count-1].X, &ptcopy[count-1].Y,
pen->customend->inset * pen->width);
if(pen->startcap == LineCapArrowAnchor)
shorten_line_amt(ptcopy[1].X, ptcopy[1].Y,
&ptcopy[0].X, &ptcopy[0].Y, pen->width);
else if((pen->startcap == LineCapCustom) && pen->customstart)
shorten_line_amt(ptcopy[1].X, ptcopy[1].Y,
&ptcopy[0].X, &ptcopy[0].Y,
pen->customend->inset * pen->width);
draw_cap(graphics, pen->brush->lb.lbColor, pen->endcap, pen->width, pen->customend,
pt[count - 2].X, pt[count - 2].Y, pt[count - 1].X, pt[count - 1].Y);
draw_cap(graphics, pen->brush->lb.lbColor, pen->startcap, pen->width, pen->customstart,
pt[1].X, pt[1].Y, pt[0].X, pt[0].Y);\
}
transform_and_round_points(graphics, pti, ptcopy, count);
Polyline(graphics->hdc, pti, count);
end:
GdipFree(pti);
GdipFree(ptcopy);
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. If rev then work from the start of the passed points
* instead of the end. */
static void shorten_bezier_amt(GpPointF * pt, REAL amt, BOOL rev)
{
GpPointF origpt[4];
REAL percent = 0.00, dx, dy, origx, origy, diff = -1.0;
INT i, first = 0, second = 1, third = 2, fourth = 3;
if(rev){
first = 3;
second = 2;
third = 1;
fourth = 0;
}
origx = pt[fourth].X;
origy = pt[fourth].Y;
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[third].X, pt[third].Y, &pt[fourth].X, &pt[fourth].Y, percent);
shorten_line_percent(pt[second].X, pt[second].Y, &pt[third].X, &pt[third].Y, percent);
shorten_line_percent(pt[third].X, pt[third].Y, &pt[fourth].X, &pt[fourth].Y, percent);
shorten_line_percent(pt[first].X, pt[first].Y, &pt[second].X, &pt[second].Y, percent);
shorten_line_percent(pt[second].X, pt[second].Y, &pt[third].X, &pt[third].Y, percent);
shorten_line_percent(pt[third].X, pt[third].Y, &pt[fourth].X, &pt[fourth].Y, percent);
dx = pt[fourth].X - origx;
dy = pt[fourth].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(GpGraphics *graphics, GpPen *pen,
GDIPCONST GpPointF * pt, INT count, BOOL caps)
{
POINT *pti, curpos;
GpPointF *ptcopy;
REAL x, y;
GpStatus status = GenericError;
if(!count)
return Ok;
pti = GdipAlloc(count * sizeof(POINT));
ptcopy = GdipAlloc(count * sizeof(GpPointF));
if(!pti || !ptcopy){
status = OutOfMemory;
goto end;
}
memcpy(ptcopy, pt, count * sizeof(GpPointF));
if(caps){
if(pen->endcap == LineCapArrowAnchor)
shorten_bezier_amt(&ptcopy[count-4], pen->width, FALSE);
/* FIXME The following is seemingly correct only for baseinset < 0 or
* baseinset > ~3. With smaller baseinsets, windows actually
* lengthens the bezier line instead of shortening it. */
else if((pen->endcap == LineCapCustom) && pen->customend){
x = pt[count - 1].X;
y = pt[count - 1].Y;
shorten_line_amt(pt[count - 2].X, pt[count - 2].Y, &x, &y,
pen->width * pen->customend->inset);
MoveToEx(graphics->hdc, roundr(pt[count - 1].X), roundr(pt[count - 1].Y), &curpos);
LineTo(graphics->hdc, roundr(x), roundr(y));
MoveToEx(graphics->hdc, curpos.x, curpos.y, NULL);
}
if(pen->startcap == LineCapArrowAnchor)
shorten_bezier_amt(ptcopy, pen->width, TRUE);
else if((pen->startcap == LineCapCustom) && pen->customstart){
x = ptcopy[0].X;
y = ptcopy[0].Y;
shorten_line_amt(ptcopy[1].X, ptcopy[1].Y, &x, &y,
pen->width * pen->customend->inset);
MoveToEx(graphics->hdc, roundr(pt[0].X), roundr(pt[0].Y), &curpos);
LineTo(graphics->hdc, roundr(x), roundr(y));
MoveToEx(graphics->hdc, curpos.x, curpos.y, NULL);
}
/* 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(graphics, pen->brush->lb.lbColor, pen->endcap, pen->width, pen->customend,
pt[count - 1].X - (ptcopy[count - 1].X - ptcopy[count - 2].X),
pt[count - 1].Y - (ptcopy[count - 1].Y - ptcopy[count - 2].Y),
pt[count - 1].X, pt[count - 1].Y);
draw_cap(graphics, pen->brush->lb.lbColor, pen->startcap, pen->width, pen->customstart,
pt[0].X - (ptcopy[0].X - ptcopy[1].X),
pt[0].Y - (ptcopy[0].Y - ptcopy[1].Y), pt[0].X, pt[0].Y);
}
transform_and_round_points(graphics, pti, ptcopy, count);
PolyBezier(graphics->hdc, pti, count);
status = Ok;
end:
GdipFree(pti);
GdipFree(ptcopy);
return status;
}
/* Draws a combination of bezier curves and lines between points. */
static GpStatus draw_poly(GpGraphics *graphics, GpPen *pen, GDIPCONST GpPointF * pt,
GDIPCONST BYTE * types, INT count, BOOL caps)
{
POINT *pti = GdipAlloc(count * sizeof(POINT)), curpos;
BYTE *tp = GdipAlloc(count);
GpPointF *ptcopy = GdipAlloc(count * sizeof(GpPointF));
REAL x = pt[count - 1].X, y = pt[count - 1].Y;
INT i, j;
GpStatus status = GenericError;
if(!count){
status = Ok;
goto end;
}
if(!pti || !tp || !ptcopy){
status = OutOfMemory;
goto end;
}
for(i = 1; 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;
}
}
memcpy(ptcopy, pt, count * sizeof(GpPointF));
/* 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:
if(pen->endcap == LineCapArrowAnchor)
shorten_bezier_amt(&ptcopy[count - 4], pen->width, FALSE);
else if((pen->endcap == LineCapCustom) && pen->customend){
x = pt[count - 1].X;
y = pt[count - 1].Y;
shorten_line_amt(pt[count - 2].X, pt[count - 2].Y, &x, &y,
pen->width * pen->customend->inset);
MoveToEx(graphics->hdc, roundr(pt[count - 1].X),
roundr(pt[count - 1].Y), &curpos);
LineTo(graphics->hdc, roundr(x), roundr(y));
MoveToEx(graphics->hdc, curpos.x, curpos.y, NULL);
}
draw_cap(graphics, pen->brush->lb.lbColor, pen->endcap, pen->width, pen->customend,
pt[count - 1].X - (ptcopy[count - 1].X - ptcopy[count - 2].X),
pt[count - 1].Y - (ptcopy[count - 1].Y - ptcopy[count - 2].Y),
pt[count - 1].X, pt[count - 1].Y);
break;
case PathPointTypeLine:
if(pen->endcap == LineCapArrowAnchor)
shorten_line_amt(ptcopy[count - 2].X, ptcopy[count - 2].Y,
&ptcopy[count - 1].X, &ptcopy[count - 1].Y,
pen->width);
else if((pen->endcap == LineCapCustom) && pen->customend)
shorten_line_amt(ptcopy[count - 2].X, ptcopy[count - 2].Y,
&ptcopy[count - 1].X, &ptcopy[count - 1].Y,
pen->customend->inset * pen->width);
draw_cap(graphics, pen->brush->lb.lbColor, pen->endcap, pen->width, pen->customend,
pt[count - 2].X, pt[count - 2].Y, pt[count - 1].X,
pt[count - 1].Y);
break;
default:
ERR("Bad path last point\n");
goto end;
}
/* Find start of points */
for(j = 1; j < count && ((types[j] & PathPointTypePathTypeMask)
== PathPointTypeStart); j++);
switch(types[j] & PathPointTypePathTypeMask){
case PathPointTypeBezier:
if(pen->startcap == LineCapArrowAnchor)
shorten_bezier_amt(&ptcopy[j - 1], pen->width, TRUE);
else if((pen->startcap == LineCapCustom) && pen->customstart){
x = pt[j - 1].X;
y = pt[j - 1].Y;
shorten_line_amt(ptcopy[j].X, ptcopy[j].Y, &x, &y,
pen->width * pen->customstart->inset);
MoveToEx(graphics->hdc, roundr(pt[j - 1].X), roundr(pt[j - 1].Y), &curpos);
LineTo(graphics->hdc, roundr(x), roundr(y));
MoveToEx(graphics->hdc, curpos.x, curpos.y, NULL);
}
draw_cap(graphics, pen->brush->lb.lbColor, pen->startcap, pen->width, pen->customstart,
pt[j - 1].X - (ptcopy[j - 1].X - ptcopy[j].X),
pt[j - 1].Y - (ptcopy[j - 1].Y - ptcopy[j].Y),
pt[j - 1].X, pt[j - 1].Y);
break;
case PathPointTypeLine:
if(pen->startcap == LineCapArrowAnchor)
shorten_line_amt(ptcopy[j].X, ptcopy[j].Y,
&ptcopy[j - 1].X, &ptcopy[j - 1].Y,
pen->width);
else if((pen->startcap == LineCapCustom) && pen->customstart)
shorten_line_amt(ptcopy[j].X, ptcopy[j].Y,
&ptcopy[j - 1].X, &ptcopy[j - 1].Y,
pen->customstart->inset * pen->width);
draw_cap(graphics, pen->brush->lb.lbColor, pen->endcap, pen->width, pen->customstart,
pt[j].X, pt[j].Y, pt[j - 1].X,
pt[j - 1].Y);
break;
default:
ERR("Bad path points\n");
goto end;
}
}
transform_and_round_points(graphics, pti, ptcopy, count);
for(i = 0; i < count; i++){
tp[i] = convert_path_point_type(types[i]);
}
PolyDraw(graphics->hdc, pti, tp, count);
status = Ok;
end:
GdipFree(pti);
GdipFree(ptcopy);
GdipFree(tp);
return status;
}
GpStatus WINGDIPAPI GdipCreateFromHDC(HDC hdc, GpGraphics **graphics)
{
GpStatus retval;
if(hdc == NULL)
return OutOfMemory;
if(graphics == NULL)
return InvalidParameter;
*graphics = GdipAlloc(sizeof(GpGraphics));
if(!*graphics) return OutOfMemory;
if((retval = GdipCreateMatrix(&(*graphics)->worldtrans)) != Ok){
GdipFree(*graphics);
return retval;
}
(*graphics)->hdc = hdc;
(*graphics)->hwnd = NULL;
(*graphics)->smoothing = SmoothingModeDefault;
(*graphics)->compqual = CompositingQualityDefault;
(*graphics)->interpolation = InterpolationModeDefault;
(*graphics)->pixeloffset = PixelOffsetModeDefault;
(*graphics)->unit = UnitDisplay;
(*graphics)->scale = 1.0;
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 GdipCreateMetafileFromEmf(HENHMETAFILE hemf, BOOL delete,
GpMetafile **metafile)
{
static int calls;
if(!hemf || !metafile)
return InvalidParameter;
if(!(calls++))
FIXME("not implemented\n");
return NotImplemented;
}
GpStatus WINGDIPAPI GdipCreateMetafileFromWmf(HMETAFILE hwmf, BOOL delete,
GDIPCONST WmfPlaceableFileHeader * placeable, GpMetafile **metafile)
{
static int calls;
if(!hwmf || !metafile || !placeable)
return InvalidParameter;
if(!(calls++))
FIXME("not implemented\n");
return NotImplemented;
}
GpStatus WINGDIPAPI GdipDeleteGraphics(GpGraphics *graphics)
{
if(!graphics) return InvalidParameter;
if(graphics->hwnd)
ReleaseDC(graphics->hwnd, graphics->hdc);
GdipDeleteMatrix(graphics->worldtrans);
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 = prepare_dc(graphics, pen);
retval = draw_polybezier(graphics, pen, points, num_pts, TRUE);
restore_dc(graphics, 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 = prepare_dc(graphics, pen);
retval = draw_polybezier(graphics, pen, pt, 4, TRUE);
restore_dc(graphics, 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 = prepare_dc(graphics, pen);
retval = draw_polybezier(graphics, pen, pt, len_pt, TRUE);
GdipFree(pt);
restore_dc(graphics, 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 = prepare_dc(graphics, pen);
retval = draw_polyline(graphics, pen, pt, 2, TRUE);
restore_dc(graphics, 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 = prepare_dc(graphics, pen);
retval = draw_polyline(graphics, pen, points, count, TRUE);
restore_dc(graphics, 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 = prepare_dc(graphics, pen);
retval = draw_poly(graphics, pen, path->pathdata.Points,
path->pathdata.Types, path->pathdata.Count, TRUE);
restore_dc(graphics, save_state);
return retval;
}
GpStatus WINGDIPAPI GdipDrawPie(GpGraphics *graphics, GpPen *pen, REAL x,
REAL y, REAL width, REAL height, REAL startAngle, REAL sweepAngle)
{
INT save_state;
if(!graphics || !pen)
return InvalidParameter;
save_state = prepare_dc(graphics, pen);
SelectObject(graphics->hdc, GetStockObject(NULL_BRUSH));
draw_pie(graphics, x, y, width, height, startAngle, sweepAngle);
restore_dc(graphics, save_state);
return Ok;
}
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 = prepare_dc(graphics, pen);
SelectObject(graphics->hdc, GetStockObject(NULL_BRUSH));
Rectangle(graphics->hdc, x, y, x + width, y + height);
restore_dc(graphics, 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, 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)
{
INT save_state;
if(!graphics || !brush)
return InvalidParameter;
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, brush->gdibrush);
SelectObject(graphics->hdc, GetStockObject(NULL_PEN));
draw_pie(graphics, x, y, width, height, startAngle, sweepAngle);
RestoreDC(graphics->hdc, save_state);
return Ok;
}
GpStatus WINGDIPAPI GdipFillPolygonI(GpGraphics *graphics, GpBrush *brush,
GDIPCONST GpPoint *points, INT count, GpFillMode fillMode)
{
INT save_state, i;
GpPointF *ptf = NULL;
POINT *pti = NULL;
GpStatus retval = Ok;
if(!graphics || !brush || !points || !count)
return InvalidParameter;
ptf = GdipAlloc(count * sizeof(GpPointF));
pti = GdipAlloc(count * sizeof(POINT));
if(!ptf || !pti){
retval = OutOfMemory;
goto end;
}
for(i = 0; i < count; i ++){
ptf[i].X = (REAL) points[i].X;
ptf[i].Y = (REAL) points[i].Y;
}
save_state = SaveDC(graphics->hdc);
EndPath(graphics->hdc);
SelectObject(graphics->hdc, brush->gdibrush);
SelectObject(graphics->hdc, GetStockObject(NULL_PEN));
SetPolyFillMode(graphics->hdc, (fillMode == FillModeAlternate ? ALTERNATE
: WINDING));
transform_and_round_points(graphics, pti, ptf, count);
Polygon(graphics->hdc, pti, count);
RestoreDC(graphics->hdc, save_state);
end:
GdipFree(ptf);
GdipFree(pti);
return retval;
}
/* 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;
}
GpStatus WINGDIPAPI GdipGetPageScale(GpGraphics *graphics, REAL *scale)
{
if(!graphics || !scale)
return InvalidParameter;
*scale = graphics->scale;
return Ok;
}
GpStatus WINGDIPAPI GdipGetPageUnit(GpGraphics *graphics, GpUnit *unit)
{
if(!graphics || !unit)
return InvalidParameter;
*unit = graphics->unit;
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 GdipGetWorldTransform(GpGraphics *graphics, GpMatrix *matrix)
{
if(!graphics || !matrix)
return InvalidParameter;
memcpy(matrix, graphics->worldtrans, sizeof(GpMatrix));
return Ok;
}
GpStatus WINGDIPAPI GdipRestoreGraphics(GpGraphics *graphics, GraphicsState state)
{
static int calls;
if(!graphics)
return InvalidParameter;
if(!(calls++))
FIXME("graphics state not implemented\n");
return NotImplemented;
}
GpStatus WINGDIPAPI GdipSaveGraphics(GpGraphics *graphics, GraphicsState *state)
{
static int calls;
if(!graphics || !state)
return InvalidParameter;
if(!(calls++))
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 GdipSetPageScale(GpGraphics *graphics, REAL scale)
{
if(!graphics || (scale <= 0.0))
return InvalidParameter;
graphics->scale = scale;
return Ok;
}
GpStatus WINGDIPAPI GdipSetPageUnit(GpGraphics *graphics, GpUnit unit)
{
if(!graphics || (unit == UnitWorld))
return InvalidParameter;
graphics->unit = unit;
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;
}
GpStatus WINGDIPAPI GdipSetWorldTransform(GpGraphics *graphics, GpMatrix *matrix)
{
if(!graphics || !matrix)
return InvalidParameter;
GdipDeleteMatrix(graphics->worldtrans);
return GdipCloneMatrix(matrix, &graphics->worldtrans);
}
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