void SoftwareRendererImp::draw_element(SVGElement* element) {
// Task 4 (part 1):
// Modify this to implement the transformation stack
switch (element->type) {
case POINT:
draw_point(static_cast<Point&>(*element));
break;
case LINE:
draw_line(static_cast<Line&>(*element));
break;
case POLYLINE:
draw_polyline(static_cast<Polyline&>(*element));
break;
case RECT:
draw_rect(static_cast<Rect&>(*element));
break;
case POLYGON:
draw_polygon(static_cast<Polygon&>(*element));
break;
case ELLIPSE:
draw_ellipse(static_cast<Ellipse&>(*element));
break;
case IMAGE:
draw_image(static_cast<Image&>(*element));
break;
case GROUP:
draw_group(static_cast<Group&>(*element));
break;
default:
break;
}
}
/*--------------------------------------------------------------
Routine : draw_symbol
Purpose : Draws the symbol.
---------------------------------------------------------------*/
void
draw_symbol(Canvas canvas, CanvasCoord symbol_centre, SYMBOL *symbol)
{
SEGMENT *seg_list;
ARC *arc;
RECTANGLE *rect;
POLYLINE *poly;
LINE *line;
ASSERT( symbol != NULL );
seg_list = symbol->segment_list;
while (seg_list != NULL) {
/* Identify and draw the segment type */
switch (seg_list->type) {
case CLEAR_ARC_SEG :
arc = (ARC *)(seg_list->seg);
clear_arc(canvas, arc, symbol_centre);
break;
case FILL_ARC_SEG :
arc = (ARC *)(seg_list->seg);
fill_arc(canvas, arc, symbol_centre, symbol->type);
break;
case ARC_SEG :
arc = (ARC *)(seg_list->seg);
draw_arc(canvas, arc, symbol_centre);
break;
case RECTANGLE_SEG :
rect = (RECTANGLE *)(seg_list->seg);
draw_rectangle(canvas, rect, symbol_centre);
break;
case FILL_RECTANGLE_SEG :
rect = (RECTANGLE *)(seg_list->seg);
fill_rectangle(canvas, rect, symbol_centre, symbol->type);
break;
case FILL_POLYLINE_SEG :
poly = (POLYLINE *)(seg_list->seg);
fill_polyline(canvas, poly, symbol_centre, symbol->type);
break;
case POLYLINE_SEG :
poly = (POLYLINE *)(seg_list->seg);
draw_polyline(canvas, poly, symbol_centre);
break;
case LINE_SEG :
line = (LINE *)(seg_list->seg);
draw_line(canvas, line, symbol_centre);
break;
default:
printf("\n*** draw_symbol : Invalid segment type ***\n\n");
exit(1);
}
seg_list = seg_list->next;
}
}
static void
draw_polygon(DiaRenderer *object,
Point *points, int num_points,
Color *fill, Color *stroke)
{
Color *color = fill ? fill : stroke;
DIAG_NOTE(g_message("draw_polygon n:%d %f,%f ...",
num_points, points->x, points->y));
g_return_if_fail (color != NULL);
draw_polyline(object,points,num_points, color);
/* last to first */
draw_line(object, &points[num_points-1], &points[0], color);
}
int draw_curve(const Vec coords[], size_t count)
{
int segc = 0;
int ret;
Vec* curve;
if(coords == NULL) {
return -1; // nurupo~
}
for(int i = 0, j = 1; j < count; i++, j++) {
segc += ceil(vecdist(coords[i], coords[j]) * 16);
}
curve = malloc(sizeof (Vec) * segc);
if(curve == NULL) {
return -1; // malloc error
}
for(int i = 0; i < segc; i++) {
curve[i] = decasteljau(coords, count, (double)i / segc);
}
ret = draw_polyline(curve, segc);
free(curve);
return ret;
}
void SoftwareRendererImp::draw_element( SVGElement* element ) {
// Task 4 (part 1):
// Modify this to implement the transformation stack
//std::cout << element->transform << endl;
//transform svg elements
switch(element->type) {
case POINT:
{
transformation = transformation * (element->transform);
draw_point(static_cast<Point&>(*element));
transformation = transformation * (element->transform.inv());
break;
}
case LINE:
{
transformation = transformation * (element->transform);
draw_line(static_cast<Line&>(*element));
transformation = transformation * (element->transform.inv());
break;
}
case POLYLINE:
{
transformation = transformation * (element->transform);
draw_polyline(static_cast<Polyline&>(*element));
transformation = transformation * (element->transform.inv());
break;
}
case RECT:
{
transformation = transformation * (element->transform);
draw_rect(static_cast<Rect&>(*element));
transformation = transformation * (element->transform.inv());
break;
}
case POLYGON:
{
transformation = transformation * (element->transform);
draw_polygon(static_cast<Polygon&>(*element));
transformation = transformation * (element->transform.inv());
break;
}
case ELLIPSE:
{
transformation = transformation * (element->transform);
draw_ellipse(static_cast<Ellipse&>(*element));
transformation = transformation * (element->transform.inv());
break;
}
case IMAGE:
{
transformation = transformation * (element->transform);
draw_image(static_cast<Image&>(*element));
transformation = transformation * (element->transform.inv());
break;
}
case GROUP:
{
transformation = transformation * (element->transform);
draw_group(static_cast<Group&>(*element));
transformation = transformation * (element->transform.inv());
break;
}
default:
break;
}
}
// Parse the next command.
BOOL WMFUpdateState::parse_next_command(BOOL *primitive)
{
BOOL fPrimitive = FALSE;
// Remember the start of the record.
ST_DEV_POSITION lRecordOffset;
file.tell(&lRecordOffset);
// Read the next record.
METARECORD Record;
if ((error = file.read(&Record, sizeof(Record)-sizeof(Record.rdParm))) != ERRORCODE_None)
{
return FALSE;
}
// TRACE("Record %d function: %04x, size: %08lx\n", m_nRecord, Record.rdFunction, Record.rdSize);
// Process the record.
switch (Record.rdFunction)
{
case 0:
{
// End of records. All done.
return FALSE;
}
case META_ESCAPE:
{
// short n;
// file.read(&n, sizeof(n));
// TRACE("Escape: %x\n", n);
break;
}
case META_SETROP2:
case META_SETRELABS:
case META_SETMAPMODE:
{
// TRACE("IGNORED Record %d function: %04x, size: %08lx\n", m_nRecord, Record.rdFunction, Record.rdSize);
break;
}
case META_SETTEXTALIGN:
{
short nAlign;
file.read(&nAlign, sizeof(nAlign));
SetTextAlign(nAlign);
break;
}
case META_SETBKCOLOR:
{
COLORREF Color;
file.read(&Color, sizeof(Color));
SetBkColor(Color);
break;
}
case META_SETBKMODE:
{
short nMode;
file.read(&nMode, sizeof(nMode));
SetBkMode(nMode);
break;
}
case META_SETTEXTCOLOR:
{
COLORREF Color;
file.read(&Color, sizeof(Color));
SetTextColor(Color);
break;
}
case META_SETWINDOWORG:
{
// Read the parameter.
short Parms[2];
ASSERT(Record.rdSize == 5);
file.read(Parms, sizeof(Parms));
m_DCState.m_cpWindowOrg.y = Parms[0];
m_DCState.m_cpWindowOrg.x = Parms[1];
NewSourceVars();
break;
}
case META_SETWINDOWEXT:
{
// Read the parameter.
short Parms[2];
ASSERT(Record.rdSize == 5);
file.read(Parms, sizeof(Parms));
m_DCState.m_cpWindowExt.y = Parms[0];
m_DCState.m_cpWindowExt.x = Parms[1];
NewSourceVars();
break;
}
case META_CREATEBRUSHINDIRECT:
{
CWMFBrushObject* pNewBrush = new CWMFBrushObject;
file.read(&pNewBrush->m_LogBrush, sizeof(LOGBRUSH16));
NewObject(pNewBrush);
break;
}
case META_DIBCREATEPATTERNBRUSH:
{
CWMFBrushObject* pNewBrush = new CWMFBrushObject;
pNewBrush->m_LogBrush.lbStyle = BS_SOLID;
pNewBrush->m_LogBrush.lbColor = RGB(128, 0, 0);
NewObject(pNewBrush);
break;
}
case META_CREATEPENINDIRECT:
{
CWMFPenObject* pNewPen = new CWMFPenObject;
file.read(&pNewPen->m_LogPen, sizeof(LOGPEN16));
NewObject(pNewPen);
// TRACE("New pen - s: %d; w: %d, %d; c: %08lx\n",
// pNewPen->m_LogPen.lopnStyle,
// pNewPen->m_LogPen.lopnWidth.x,
// pNewPen->m_LogPen.lopnWidth.y,
// pNewPen->m_LogPen.lopnColor);
break;
}
case META_CREATEFONTINDIRECT:
{
CWMFFontObject* pNewFont = new CWMFFontObject;
// Read the data.
LOGFONT16 lf;
file.read(&lf, sizeof(LOGFONT16));
// Translate it over.
pNewFont->m_LogFont.lfHeight = lf.lfHeight;
pNewFont->m_LogFont.lfWidth = lf.lfWidth;
pNewFont->m_LogFont.lfEscapement = lf.lfEscapement;
pNewFont->m_LogFont.lfOrientation = lf.lfOrientation;
pNewFont->m_LogFont.lfWeight = lf.lfWeight;
// Warning: hard-coded size ahead.
memcpy(&pNewFont->m_LogFont.lfItalic, &lf.lfItalic, 8 + LF_FACESIZE);
NewObject(pNewFont);
break;
}
case META_CREATEPALETTE:
{
// This is mostly here to make sure the object array stays in sync.
CWMFPaletteObject* pNewPalette = new CWMFPaletteObject;
struct
{
WORD palVersion;
WORD palNumEntries;
} Header;
file.read(&Header, sizeof(Header));
// Now we have the header. See how many entries we want.
if (Header.palVersion == 0x0300)
{
int nPaletteSize = sizeof(PALETTEENTRY)*Header.palNumEntries;
pNewPalette->m_pPalette = (LOGPALETTE*)new BYTE[sizeof(LOGPALETTE) + nPaletteSize - sizeof(PALETTEENTRY)];
pNewPalette->m_pPalette->palVersion = Header.palVersion;
pNewPalette->m_pPalette->palNumEntries = Header.palNumEntries;
file.read(pNewPalette->m_pPalette->palPalEntry, nPaletteSize);
}
NewObject(pNewPalette);
break;
}
case META_CREATEREGION:
{
// This is mostly here to make sure the object array stays in sync.
// I don't think there's hope of determining the parms format for
// this record.
CWMFRegionObject* pNewRegion = new CWMFRegionObject;
NewObject(pNewRegion);
break;
}
case META_SELECTPALETTE:
case META_SELECTOBJECT:
{
short nIndex;
file.read(&nIndex, sizeof(nIndex));
SelectObject(nIndex);
// TRACE("SelectObject: %d\n", nIndex);
break;
}
case META_DELETEOBJECT:
{
short nIndex;
file.read(&nIndex, sizeof(nIndex));
DeleteObject(nIndex);
// TRACE("DeleteObject: %d\n", nIndex);
break;
}
case META_SETPOLYFILLMODE:
{
short nFillMode;
file.read(&nFillMode, sizeof(nFillMode));
m_nFillMode = nFillMode;
break;
}
case META_SETSTRETCHBLTMODE:
{
short nMode;
file.read(&nMode, sizeof(nMode));
SetBltMode(nMode);
break;
}
case META_POLYPOLYGON:
{
// Read the number of polygons.
short nPolygons;
file.read(&nPolygons, sizeof(nPolygons));
// Proceed to read counts and points (and draw).
int* pCounts = NULL;
POINT* pPoints = NULL;
TRY
{
// Allocate the polygon counts.
pCounts = new int[nPolygons];
// Read the polygon counts.
int nPoints = 0;
for (int nPolygon = 0; nPolygon < nPolygons; nPolygon++)
{
short p;
file.read(&p, sizeof(p));
pCounts[nPolygon] = p;
nPoints += p;
}
// Allocate the polygon points.
pPoints = new POINT[nPoints];
// Read the polygon points.
for (int nPoint = 0; nPoint < nPoints; nPoint++)
{
short p[2];
file.read(p, sizeof(p));
pPoints[nPoint].x = p[0];
pPoints[nPoint].y = p[1];
}
// Draw the polypolygon.
DrawPolyPolygon(pPoints, pCounts, nPolygons);
}
END_TRY
delete [] pPoints;
delete [] pCounts;
fPrimitive = TRUE;
break;
}
case META_POLYGON:
{
WORD wCount;
file.read(&wCount, sizeof(wCount));
draw_polygon(wCount);
fPrimitive = TRUE;
break;
}
case META_POLYLINE:
{
WORD wCount;
file.read(&wCount, sizeof(wCount));
draw_polyline(wCount, TRUE);
fPrimitive = TRUE;
break;
}
case META_ELLIPSE:
{
short Parms[4];
file.read(Parms, sizeof(Parms));
// Compute parameters to pass.
// Parms[3] = left
// Parms[2] = top
// Parms[1] = right
// Parms[0] = bottom
OUTLINE_POINT center;
center.x = (short)((int)Parms[3] + (int)Parms[1])/2;
center.y = (short)((int)Parms[2] + (int)Parms[0])/2;
short rx = Parms[3] - center.x;
if (rx < 0) rx = -rx;
short ry = Parms[2] - center.y;
if (ry < 0) ry = -ry;
draw_ellipse(center, rx, ry);
fPrimitive = TRUE;
break;
}
case META_ROUNDRECT:
{
// Cheat for now. Just draw it as a rectangle.
// Skip the corner radii.
file.seek(2*sizeof(short), ST_DEV_SEEK_CUR);
// Fall through to...
}
case META_RECTANGLE:
{
short Parms[4];
file.read(Parms, sizeof(Parms));
// Parms[3] = left
// Parms[2] = top
// Parms[1] = right
// Parms[0] = bottom
OUTLINE_POINT p0, p1;
p0.x = Parms[3];
p0.y = Parms[2];
p1.x = Parms[1];
p1.y = Parms[0];
draw_rectangle(p0, p1);
fPrimitive = TRUE;
break;
}
case META_DIBSTRETCHBLT:
{
// Read the numeric parameters.
short Parms[10];
file.read(Parms, sizeof(Parms));
// Parms[0] = low-order word of raster op
// Parms[1] = high-order word of raster op
// Parms[2] = source y extent
// Parms[3] = source x extent
// Parms[4] = source y coordinate
// Parms[5] = source x coordinate
// Parms[6] = destination y extent
// Parms[7] = destination x extent
// Parms[8] = destination y coordinate
// Parms[9] = destination x coordinate
CRect crSource(CPoint(Parms[5], Parms[4]), CSize(Parms[3], Parms[2]));
CRect crDest(CPoint(Parms[9], Parms[8]), CSize(Parms[7], Parms[6]));
DWORD dwROP = MAKELONG(Parms[0], Parms[1]);
// Process the rest of the dib blt.
DoDibBlt(crSource, crDest, dwROP);
fPrimitive = TRUE;
break;
}
case META_DIBBITBLT:
{
// Read the numeric parameters.
short Parms[7];
file.read(Parms, sizeof(Parms));
// Parms[0] = high-order word of raster op
// Parms[1] = source y coordinate
// Parms[2] = source x coordinate
// Parms[3] = destination y extent
// Parms[4] = destination x extent
// Parms[5] = destination y coordinate
// Parms[6] = destination x coordinate
CRect crSource(CPoint(Parms[5], Parms[4]), CSize(Parms[7], Parms[6]));
CRect crDest(CPoint(Parms[9], Parms[8]), CSize(Parms[7], Parms[6]));
DWORD dwROP = MAKELONG(0, Parms[1]);
// Process the rest of the dib blt.
DoDibBlt(crSource, crDest, dwROP);
fPrimitive = TRUE;
break;
}
case META_STRETCHDIB:
{
// Read the numeric parameters.
short Parms[11];
file.read(Parms, sizeof(Parms));
// Parms[0] = low-order word of raster op
// Parms[1] = high-order word of raster op
// Parms[2] = usage flag
// Parms[3] = source y extent
// Parms[4] = source x extent
// Parms[5] = source y coordinate
// Parms[6] = source x coordinate
// Parms[7] = destination y extent
// Parms[8] = destination x extent
// Parms[9] = destination y coordinate
// Parms[10] = destination x coordinate
CRect crSource(CPoint(Parms[6], Parms[5]), CSize(Parms[4], Parms[3]));
CRect crDest(CPoint(Parms[10], Parms[9]), CSize(Parms[8], Parms[7]));
DWORD dwROP = MAKELONG(Parms[0], Parms[1]);
WORD wUsage = (WORD)Parms[2];
// Process the rest of the dib blt.
DoDibBlt(crSource, crDest, dwROP, wUsage);
fPrimitive = TRUE;
break;
}
case META_EXTTEXTOUT:
{
// Handle ExtTextOut call.
// Read the numeric parameters.
short Parms[4];
file.read(Parms, sizeof(Parms));
// Parms[0] = y
// Parms[1] = x
// Parms[2] = string length
// Parms[3] = option flags
RECTS rClip;
if (Parms[3] != 0)
{
file.read(&rClip, sizeof(rClip));
}
// String data follows
int nStrLength = Parms[2];
int nStrSize = (nStrLength + 1) & ~1;
LPBYTE pString = NULL;
TRY
{
// Read the text.
pString = new BYTE[nStrSize];
file.huge_read(pString, nStrSize);
// See if there are any widths.
ST_DEV_POSITION Here;
file.tell(&Here);
ST_DEV_POSITION lRecordEnd = lRecordOffset + Record.rdSize*sizeof(WORD);
// TRACE("Count:%d; Here: %ld; lRecordEnd: %ld\n",
// nStrLength, Here, lRecordEnd);
int nDXSize = nStrLength*sizeof(short);
short* pDX = NULL;
if (lRecordEnd >= Here + nDXSize)
{
pDX = new short[nStrLength];
file.read(pDX, nDXSize);
}
OUTLINE_POINT p;
p.x = (short)Parms[1];
p.y = (short)Parms[0];
RECT r;
r.left = rClip.left;
r.top = rClip.top;
r.right = rClip.right;
r.bottom = rClip.bottom;
// Draw the text.
DrawText(p, Parms[3], (LPCSTR)pString, nStrLength, &r, pDX);
// Free the dx array.
delete [] pDX;
// Free the text.
delete pString;
}
END_TRY
fPrimitive = TRUE;
break;
}
case META_TEXTOUT:
{
// Handle TextOut call.
// Read the string size.
short nStrLength;
file.read(&nStrLength, sizeof(nStrLength));
int nStrSize = (nStrLength + 1) & ~1;
LPBYTE pString = NULL;
TRY
{
// Read the text.
pString = new BYTE[nStrSize];
file.huge_read(pString, nStrSize);
// Read the x and y.
short Parms[2];
file.read(Parms, sizeof(Parms));
OUTLINE_POINT p;
p.x = (short)Parms[1];
p.y = (short)Parms[0];
// Draw the text.
DrawText(p, 0, (LPCSTR)pString, nStrLength, NULL);
// Free the text.
delete pString;
}
END_TRY
fPrimitive = TRUE;
break;
}
case META_MOVETO:
case META_LINETO:
{
short Parms[2];
file.read(&Parms, sizeof(Parms));
// TRACE("%s: %d, %d\n", Record.rdFunction == META_MOVETO ? "MoveTo" : "LineTo", Parms[1], Parms[0]);
OUTLINE_POINT p;
p.x = Parms[1];
p.y = Parms[0];
if (Record.rdFunction == META_MOVETO)
{
// Move to.
MoveTo(p);
}
else
{
// Must be Line to.
LineTo(p);
fPrimitive = TRUE;
}
break;
}
case META_PATBLT:
{
WORD Parms[6];
// Parms[0] - op low word
// Parms[1] - op high word
// Parms[2] - height
// Parms[3] - width
// Parms[4] - top
// Parms[5] - left
file.read(Parms, sizeof(Parms));
OUTLINE_POINT p0, p1;
p0.x = Parms[5];
p0.y = Parms[4];
p1.x = p0.x + Parms[3];
p1.y = p0.y + Parms[2];
DoPatBlt(p0, p1, MAKELONG(Parms[0], Parms[1]));
fPrimitive = TRUE;
break;
}
case META_PIE:
case META_ARC:
{
short Parms[8];
// Parms[0] = y4 end pt y
// Parms[1] = x4 end pt x
// Parms[2] = y3 start pt y
// Parms[3] = x3 start pt x
// Parms[4] = y2 Bound bottom
// Parms[5] = x2 Bound right
// Parms[6] = y1 Bound top
// Parms[7] = x1 Bound left
file.read(Parms, sizeof(Parms));
OUTLINE_POINT Center;
Center.x = (short)midpoint(Parms[7], Parms[5]);
Center.y = (short)midpoint(Parms[6], Parms[4]);
double rx = Parms[5] - Center.x;
if (rx < 0) rx = -rx;
double ry = Parms[4] - Center.y;
if (ry < 0) ry = -ry;
double dStart = angle_from_vector(Parms[2] - Center.y, Parms[3] - Center.x);
double dEnd = angle_from_vector(Parms[0] - Center.y, Parms[1] - Center.x);
draw_elliptical_arc(Center, rx, ry, dStart-PI/2, dEnd-PI/2, (Record.rdFunction == META_PIE) ? 1 : -1);
break;
}
case META_SAVEDC:
{
PushState();
break;
}
case META_RESTOREDC:
{
PopState();
break;
}
case META_SCALEVIEWPORTEXT:
{
// Read the parameter.
short Parms[4];
// Parms[0] = ydenom
// Parms[1] = ynum
// Parms[2] = xdenom
// Parms[3] = xnum
file.read(Parms, sizeof(Parms));
m_DCState.m_cpViewportScaleNum.x = Parms[3];
m_DCState.m_cpViewportScaleDenom.x = Parms[2];
m_DCState.m_cpViewportScaleNum.y = Parms[1];
m_DCState.m_cpViewportScaleDenom.y = Parms[0];
NewSourceVars();
break;
}
default:
{
TRACE("UNKNOWN Record %d function: %04x, size: %08lx\n", m_nRecord, Record.rdFunction, Record.rdSize);
break;
}
}
m_nRecord++;
// Seek past the record
file.seek(lRecordOffset + Record.rdSize*sizeof(WORD), ST_DEV_SEEK_SET);
*primitive = fPrimitive;
return TRUE;
}
gint button_press_event( GtkWidget *widget,
GdkEventButton *event )
{
modified=1;
if (event->button == 1 && pixmap != NULL)
switch(tool)
{
case RECT_SEL: gdk_draw_drawable(undomap,fg_gc,pixmap,0,0,0,0,-1,-1);
pre_x=event->x;
pre_y=event->y;
select_rectangular_region(widget,event->x,event->y,1);
last_x=event->x;
last_y=event->y;
break;
case ERASER: gdk_draw_drawable(undomap,fg_gc,pixmap,0,0,0,0,-1,-1);
last_x=event->x;
last_y=event->y;
eraser(widget,event->x,event->y);
break;
case LINE: gdk_draw_drawable(undomap,fg_gc,pixmap,0,0,0,0,-1,-1);
pre_x=event->x;
pre_y=event->y;
draw_line(widget,event->x,event->y,0);
last_x=event->x;
last_y=event->y;
break;
case TEXT: gdk_draw_drawable(undomap,fg_gc,pixmap,0,0,0,0,-1,-1);
draw_text(widget,event->x,event->y);
break;
case BRUSH:gdk_draw_drawable(undomap,fg_gc,pixmap,0,0,0,0,-1,-1);
last_x=event->x;
last_y=event->y;
paintbrush(widget,event->x,event->y);
break;
case SPRAYCAN:gdk_draw_drawable(undomap,fg_gc,pixmap,0,0,0,0,-1,-1);
last_x=event->x;
last_y=event->y;
spraycan(widget,event->x,event->y);
break;
case PENCIL:gdk_draw_drawable(undomap,fg_gc,pixmap,0,0,0,0,-1,-1);
last_x=event->x;
last_y=event->y;
draw_using_pencil(widget,event->x,event->y);
break;
case BUCKET: bucketfill(widget,event->x,event->y);
break;
case COLORPICK: gdk_gc_copy(undo_gc,fg_gc);
undoflag=1;
colorpicker(widget,event->x,event->y);
break;
case POLYLINE:if(!poly)
{pre_x=event->x;
pre_y=event->y;
poly++;}
draw_polyline(widget,event->x,event->y,1);
break;
case ELLIPSE:gdk_draw_drawable(undomap,fg_gc,pixmap,0,0,0,0,-1,-1);
pre_x=event->x;
pre_y=event->y;
draw_arc(widget,event->x,event->y,0);
last_x=event->x;
last_y=event->y;
break;
case POLYGON:if(!poly)
{
pre_x=event->x;
pre_y=event->y;
last_x=event->x;
last_y=event->y;
poly++;
}
draw_polygon(widget,event->x,event->y,1);
break;
case RECTANGLE:gdk_draw_drawable(undomap,fg_gc,pixmap,0,0,0,0,-1,-1);
pre_x=event->x;
pre_y=event->y;
draw_rectangle(widget,event->x,event->y,0);
last_x=event->x;
last_y=event->y;
break;
}
return TRUE;
}
inline void draw(const quadratic_bezier<T,2>& bezier, const std::size_t& point_count)
{
std::vector< point2d<T> > point_list;
wykobi::generate_bezier(bezier,point_count,point_list);
draw_polyline(point_list);
}
virtual void on_draw()
{
pixfmt pf(rbuf_window());
renderer_base ren_base(pf);
ren_base.clear(agg::rgba(0.5, 0.75, 0.85));
renderer_scanline ren(ren_base);
rasterizer_scanline ras;
scanline sl;
ras.clip_box(0, 0, width(), height());
// Pattern source. Must have an interface:
// width() const
// height() const
// pixel(int x, int y) const
// Any agg::renderer_base<> or derived
// is good for the use as a source.
//-----------------------------------
pattern_src_brightness_to_alpha_rgba8 p1(rbuf_img(0));
agg::pattern_filter_bilinear_rgba8 fltr; // Filtering functor
// agg::line_image_pattern is the main container for the patterns. It creates
// a copy of the patterns extended according to the needs of the filter.
// agg::line_image_pattern can operate with arbitrary image width, but if the
// width of the pattern is power of 2, it's better to use the modified
// version agg::line_image_pattern_pow2 because it works about 15-25 percent
// faster than agg::line_image_pattern (because of using simple masking instead
// of expensive '%' operation).
typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba8> pattern_type;
typedef agg::renderer_base<pixfmt> base_ren_type;
typedef agg::renderer_outline_image<base_ren_type, pattern_type> renderer_img_type;
typedef agg::rasterizer_outline_aa<renderer_img_type, agg::line_coord_sat> rasterizer_img_type;
typedef agg::renderer_outline_aa<base_ren_type> renderer_line_type;
typedef agg::rasterizer_outline_aa<renderer_line_type, agg::line_coord_sat> rasterizer_line_type;
//-- Create with specifying the source
//pattern_type patt(fltr, src);
//-- Create uninitialized and set the source
pattern_type patt(fltr);
patt.create(p1);
renderer_img_type ren_img(ren_base, patt);
rasterizer_img_type ras_img(ren_img);
//-- create uninitialized and set parameters
agg::line_profile_aa profile;
profile.smoother_width(10.0); //optional
profile.width(8.0); //mandatory!
renderer_line_type ren_line(ren_base, profile);
ren_line.color(agg::rgba8(0,0,127)); //mandatory!
rasterizer_line_type ras_line(ren_line);
ras_line.round_cap(true); //optional
//ras_line.line_join(agg::outline_no_join); //optional
// Calculate the dilation value so that, the line caps were
// drawn correctly.
//---------------
double w2 = 9.0;//p1.height() / 2 + 2;
// Set the clip box a bit bigger than you expect. You need it
// to draw the clipped line caps correctly. The correct result
// is achieved with raster clipping.
//------------------------
ren_img.scale_x(m_scale_x.value());
ren_img.start_x(m_start_x.value());
ren_img.clip_box (50-w2, 50-w2, width()-50+w2, height()-50+w2);
ren_line.clip_box(50-w2, 50-w2, width()-50+w2, height()-50+w2);
// First, draw polyline without raster clipping just to show the idea
//------------------------
draw_polyline(ras_line, ren_line, m_line1.polygon(), m_line1.num_points());
draw_polyline(ras_img, ren_img, m_line1.polygon(), m_line1.num_points());
// Clear the area, almost opaque, but not completely
//------------------------
ren_base.blend_bar(0, 0, (int)width(), (int)height(), agg::rgba(1,1,1), 200);
// Set the raster clip box and then, draw again.
// In reality there shouldn't be two calls above.
// It's done only for demonstration
//------------------------
ren_base.clip_box((int)50, (int)50, (int)width()-50, (int)height()-50);
// This "copy_bar" is also for demonstration only
//------------------------
ren_base.copy_bar(0, 0, (int)width(), (int)height(), agg::rgba(1,1,1));
// Finally draw polyline correctly clipped: We use double clipping,
// first is vector clipping, with extended clip box, second is raster
// clipping with normal clip box.
//------------------------
ren_img.scale_x(m_scale_x.value());
ren_img.start_x(m_start_x.value());
draw_polyline(ras_line, ren_line, m_line1.polygon(), m_line1.num_points());
draw_polyline(ras_img, ren_img, m_line1.polygon(), m_line1.num_points());
// Reset clipping and draw the controls and stuff
ren_base.reset_clipping(true);
m_line1.line_width(1/m_scale.scale());
m_line1.point_radius(5/m_scale.scale());
agg::render_ctrl(ras, sl, ren_base, m_line1);
agg::render_ctrl(ras, sl, ren_base, m_scale_x);
agg::render_ctrl(ras, sl, ren_base, m_start_x);
char buf[256];
agg::gsv_text t;
t.size(10.0);
agg::conv_stroke<agg::gsv_text> pt(t);
pt.width(1.5);
pt.line_cap(agg::round_cap);
const double* p = m_line1.polygon();
sprintf(buf, "Len=%.2f", agg::calc_distance(p[0], p[1], p[2], p[3]) * m_scale.scale());
t.start_point(10.0, 30.0);
t.text(buf);
ras.add_path(pt);
ren.color(agg::rgba(0,0,0));
agg::render_scanlines(ras, sl, ren);
}
