static void
draw_polygon(void* _context, size_t numPoints, const BPoint viewPoints[],
bool isClosed, bool fill)
{
DrawingContext* context = reinterpret_cast<DrawingContext *>(_context);
if (numPoints == 0)
return;
const size_t kMaxStackCount = 200;
char stackData[kMaxStackCount * sizeof(BPoint)];
BPoint* points = (BPoint*)stackData;
if (numPoints > kMaxStackCount) {
points = (BPoint*)malloc(numPoints * sizeof(BPoint));
if (points == NULL)
return;
}
context->ConvertToScreenForDrawing(points, viewPoints, numPoints);
BRect polyFrame;
get_polygon_frame(points, numPoints, &polyFrame);
context->GetDrawingEngine()->DrawPolygon(points, numPoints, polyFrame,
fill, isClosed && numPoints > 2);
if (numPoints > kMaxStackCount)
free(points);
}
static void
stroke_line(void* _context, const BPoint& _start, const BPoint& _end)
{
DrawingContext* context = reinterpret_cast<DrawingContext *>(_context);
BPoint start = _start;
BPoint end = _end;
context->ConvertToScreenForDrawing(&start);
context->ConvertToScreenForDrawing(&end);
context->GetDrawingEngine()->StrokeLine(start, end);
context->CurrentState()->SetPenLocation(_end);
// the DrawingEngine/Painter does not need to be updated, since this
// effects only the view->screen coord conversion, which is handled
// by the view only
}
static void
draw_ellipse(void* _context, const BRect& _rect, bool fill)
{
DrawingContext* context = reinterpret_cast<DrawingContext *>(_context);
BRect rect = _rect;
context->ConvertToScreenForDrawing(&rect);
context->GetDrawingEngine()->DrawEllipse(rect, fill);
}
static void
pop_state(void* _context)
{
DrawingContext* context = reinterpret_cast<DrawingContext *>(_context);
context->PopState();
BPoint p(0, 0);
context->ConvertToScreenForDrawing(&p);
context->GetDrawingEngine()->SetDrawState(context->CurrentState(),
(int32)p.x, (int32)p.y);
}
static void
draw_arc(void* _context, const BPoint& center, const BPoint& radii,
float startTheta, float arcTheta, bool fill)
{
DrawingContext* context = reinterpret_cast<DrawingContext *>(_context);
BRect rect(center.x - radii.x, center.y - radii.y,
center.x + radii.x - 1, center.y + radii.y - 1);
context->ConvertToScreenForDrawing(&rect);
context->GetDrawingEngine()->DrawArc(rect, startTheta, arcTheta, fill);
}
static void
draw_round_rect(void* _context, const BRect& _rect, const BPoint& radii,
bool fill)
{
DrawingContext* context = reinterpret_cast<DrawingContext *>(_context);
BRect rect = _rect;
context->ConvertToScreenForDrawing(&rect);
float scale = context->CurrentState()->CombinedScale();
context->GetDrawingEngine()->DrawRoundRect(rect, radii.x * scale,
radii.y * scale, fill);
}
static void
draw_rect(void* _context, const BRect& _rect, bool fill)
{
DrawingContext* context = reinterpret_cast<DrawingContext *>(_context);
BRect rect = _rect;
context->ConvertToScreenForDrawing(&rect);
if (fill)
context->GetDrawingEngine()->FillRect(rect);
else
context->GetDrawingEngine()->StrokeRect(rect);
}
static void
draw_bezier(void* _context, size_t numPoints, const BPoint viewPoints[],
bool fill)
{
DrawingContext* context = reinterpret_cast<DrawingContext *>(_context);
const size_t kSupportedPoints = 4;
if (numPoints != kSupportedPoints)
return;
BPoint points[kSupportedPoints];
context->ConvertToScreenForDrawing(points, viewPoints, kSupportedPoints);
context->GetDrawingEngine()->DrawBezier(points, fill);
}
static void
draw_pixels(void* _context, const BRect& src, const BRect& _dest, uint32 width,
uint32 height, size_t bytesPerRow, color_space pixelFormat, uint32 options,
const void* data, size_t length)
{
DrawingContext* context = reinterpret_cast<DrawingContext *>(_context);
UtilityBitmap bitmap(BRect(0, 0, width - 1, height - 1),
(color_space)pixelFormat, 0, bytesPerRow);
if (!bitmap.IsValid())
return;
memcpy(bitmap.Bits(), data, std::min(height * bytesPerRow, length));
BRect dest = _dest;
context->ConvertToScreenForDrawing(&dest);
context->GetDrawingEngine()->DrawBitmap(&bitmap, src, dest, options);
}
static void
draw_string(void* _context, const char* string, size_t length, float deltaSpace,
float deltaNonSpace)
{
DrawingContext* context = reinterpret_cast<DrawingContext *>(_context);
// NOTE: the picture data was recorded with a "set pen location"
// command inserted before the "draw string" command, so we can
// use PenLocation()
BPoint location = context->CurrentState()->PenLocation();
escapement_delta delta = { deltaSpace, deltaNonSpace };
context->ConvertToScreenForDrawing(&location);
location = context->GetDrawingEngine()->DrawString(string, length,
location, &delta);
context->ConvertFromScreenForDrawing(&location);
context->CurrentState()->SetPenLocation(location);
// the DrawingEngine/Painter does not need to be updated, since this
// effects only the view->screen coord conversion, which is handled
// by the view only
}
void
ShapePainter::Draw(BRect frame, bool filled)
{
// We're going to draw the currently iterated shape.
// TODO: This can be more efficient by skipping the conversion.
int32 opCount = fOpStack.size();
int32 ptCount = fPtStack.size();
if (opCount > 0 && ptCount > 0) {
int32 i;
uint32* opList = new(std::nothrow) uint32[opCount];
if (opList == NULL)
return;
BPoint* ptList = new(std::nothrow) BPoint[ptCount];
if (ptList == NULL) {
delete[] opList;
return;
}
for (i = opCount - 1; i >= 0; i--) {
opList[i] = fOpStack.top();
fOpStack.pop();
}
for (i = ptCount - 1; i >= 0; i--) {
ptList[i] = fPtStack.top();
fPtStack.pop();
}
BPoint offset(fContext->CurrentState()->PenLocation());
fContext->ConvertToScreenForDrawing(&offset);
fContext->GetDrawingEngine()->DrawShape(frame, opCount, opList,
ptCount, ptList, filled, offset, fContext->Scale());
delete[] opList;
delete[] ptList;
}
}