gdiplus: Add a software path for thin line drawing.

Signed-off-by: Vincent Povirk <vincent@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Vincent Povirk 2016-10-13 16:23:17 -05:00 committed by Alexandre Julliard
parent 092531df71
commit 6e054e43c6
1 changed files with 324 additions and 0 deletions

View File

@ -3401,12 +3401,336 @@ end:
return retval; return retval;
} }
GpStatus SOFTWARE_GdipDrawThinPath(GpGraphics *graphics, GpPen *pen, GpPath *path)
{
GpStatus stat;
GpPath* flat_path;
GpMatrix* transform;
GpRectF gp_bound_rect;
GpRect gp_output_area;
RECT output_area;
INT output_height, output_width;
DWORD *output_bits, *brush_bits=NULL;
int i;
static const BYTE static_dash_pattern[] = {1,1,1,0,1,0,1,0};
const BYTE *dash_pattern;
INT dash_pattern_size;
BYTE *dyn_dash_pattern = NULL;
stat = GdipClonePath(path, &flat_path);
if (stat != Ok)
return stat;
stat = GdipCreateMatrix(&transform);
if (stat == Ok)
{
stat = get_graphics_transform(graphics, CoordinateSpaceDevice,
CoordinateSpaceWorld, transform);
if (stat == Ok)
stat = GdipFlattenPath(flat_path, transform, 1.0);
GdipDeleteMatrix(transform);
}
/* estimate the output size in pixels, can be larger than necessary */
if (stat == Ok)
{
output_area.left = floorf(flat_path->pathdata.Points[0].X);
output_area.right = ceilf(flat_path->pathdata.Points[0].X);
output_area.top = floorf(flat_path->pathdata.Points[0].Y);
output_area.bottom = ceilf(flat_path->pathdata.Points[0].Y);
for (i=1; i<flat_path->pathdata.Count; i++)
{
REAL x, y;
x = flat_path->pathdata.Points[i].X;
y = flat_path->pathdata.Points[i].Y;
if (floorf(x) < output_area.left) output_area.left = floorf(x);
if (floorf(y) < output_area.top) output_area.top = floorf(y);
if (ceilf(x) > output_area.right) output_area.right = ceilf(x);
if (ceilf(y) > output_area.bottom) output_area.bottom = ceilf(y);
}
stat = get_graphics_bounds(graphics, &gp_bound_rect);
}
if (stat == Ok)
{
output_area.left = max(output_area.left, floorf(gp_bound_rect.X));
output_area.top = max(output_area.top, floorf(gp_bound_rect.Y));
output_area.right = min(output_area.right, ceilf(gp_bound_rect.X + gp_bound_rect.Width));
output_area.bottom = min(output_area.bottom, ceilf(gp_bound_rect.Y + gp_bound_rect.Height));
output_width = output_area.right - output_area.left + 1;
output_height = output_area.bottom - output_area.top + 1;
if (output_width <= 0 || output_height <= 0)
{
GdipDeletePath(flat_path);
return Ok;
}
gp_output_area.X = output_area.left;
gp_output_area.Y = output_area.top;
gp_output_area.Width = output_width;
gp_output_area.Height = output_height;
output_bits = heap_alloc_zero(output_width * output_height * sizeof(DWORD));
if (!output_bits)
stat = OutOfMemory;
}
if (stat == Ok)
{
if (pen->brush->bt != BrushTypeSolidColor)
{
/* allocate and draw brush output */
brush_bits = heap_alloc_zero(output_width * output_height * sizeof(DWORD));
if (brush_bits)
{
stat = brush_fill_pixels(graphics, pen->brush, brush_bits,
&gp_output_area, output_width);
}
else
stat = OutOfMemory;
}
if (stat == Ok)
{
/* convert dash pattern to bool array */
switch (pen->dash)
{
case DashStyleCustom:
{
dash_pattern_size = 0;
for (i=0; i < pen->numdashes; i++)
dash_pattern_size += gdip_round(pen->dashes[i]);
if (dash_pattern_size != 0)
{
dash_pattern = dyn_dash_pattern = heap_alloc(dash_pattern_size);
if (dyn_dash_pattern)
{
int j=0;
for (i=0; i < pen->numdashes; i++)
{
int k;
for (k=0; k < gdip_round(pen->dashes[i]); k++)
dyn_dash_pattern[j++] = (i&1)^1;
}
}
else
stat = OutOfMemory;
break;
}
/* else fall through */
}
case DashStyleSolid:
default:
dash_pattern = static_dash_pattern;
dash_pattern_size = 1;
break;
case DashStyleDash:
dash_pattern = static_dash_pattern;
dash_pattern_size = 4;
break;
case DashStyleDot:
dash_pattern = &static_dash_pattern[4];
dash_pattern_size = 2;
break;
case DashStyleDashDot:
dash_pattern = static_dash_pattern;
dash_pattern_size = 6;
break;
case DashStyleDashDotDot:
dash_pattern = static_dash_pattern;
dash_pattern_size = 8;
break;
}
}
if (stat == Ok)
{
/* trace path */
GpPointF subpath_start = flat_path->pathdata.Points[0];
INT prev_x = INT_MAX, prev_y = INT_MAX;
int dash_pos = dash_pattern_size - 1;
for (i=0; i < flat_path->pathdata.Count; i++)
{
BYTE type, type2;
GpPointF start_point, end_point;
GpPoint start_pointi, end_pointi;
type = flat_path->pathdata.Types[i];
if (i+1 < flat_path->pathdata.Count)
type2 = flat_path->pathdata.Types[i+1];
else
type2 = PathPointTypeStart;
start_point = flat_path->pathdata.Points[i];
if ((type & PathPointTypePathTypeMask) == PathPointTypeStart)
subpath_start = start_point;
if ((type & PathPointTypeCloseSubpath) == PathPointTypeCloseSubpath)
end_point = subpath_start;
else if ((type2 & PathPointTypePathTypeMask) == PathPointTypeStart)
continue;
else
end_point = flat_path->pathdata.Points[i+1];
start_pointi.X = floorf(start_point.X);
start_pointi.Y = floorf(start_point.Y);
end_pointi.X = floorf(end_point.X);
end_pointi.Y = floorf(end_point.Y);
/* draw line segment */
if (abs(start_pointi.Y - end_pointi.Y) > abs(start_pointi.X - end_pointi.X))
{
INT x, y, start_y, end_y, step;
if (start_pointi.Y < end_pointi.Y)
{
step = 1;
start_y = ceilf(start_point.Y) - output_area.top;
end_y = end_pointi.Y - output_area.top;
}
else
{
step = -1;
start_y = start_point.Y - output_area.top;
end_y = ceilf(end_point.Y) - output_area.top;
}
for (y=start_y; y != (end_y+step); y+=step)
{
x = gdip_round( start_point.X +
(end_point.X - start_point.X) * (y + output_area.top - start_point.Y) / (end_point.Y - start_point.Y) )
- output_area.left;
if (x == prev_x && y == prev_y)
continue;
prev_x = x;
prev_y = y;
dash_pos = (dash_pos + 1 == dash_pattern_size) ? 0 : dash_pos + 1;
if (!dash_pattern[dash_pos])
continue;
if (x < 0 || x >= output_width || y < 0 || y >= output_height)
continue;
if (brush_bits)
output_bits[x + y*output_width] = brush_bits[x + y*output_width];
else
output_bits[x + y*output_width] = ((GpSolidFill*)pen->brush)->color;
}
}
else
{
INT x, y, start_x, end_x, step;
if (start_pointi.X < end_pointi.X)
{
step = 1;
start_x = ceilf(start_point.X) - output_area.left;
end_x = end_pointi.X - output_area.left;
}
else
{
step = -1;
start_x = start_point.X - output_area.left;
end_x = ceilf(end_point.X) - output_area.left;
}
for (x=start_x; x != (end_x+step); x+=step)
{
y = gdip_round( start_point.Y +
(end_point.Y - start_point.Y) * (x + output_area.left - start_point.X) / (end_point.X - start_point.X) )
- output_area.top;
if (x == prev_x && y == prev_y)
continue;
prev_x = x;
prev_y = y;
dash_pos = (dash_pos + 1 == dash_pattern_size) ? 0 : dash_pos + 1;
if (!dash_pattern[dash_pos])
continue;
if (x < 0 || x >= output_width || y < 0 || y >= output_height)
continue;
if (brush_bits)
output_bits[x + y*output_width] = brush_bits[x + y*output_width];
else
output_bits[x + y*output_width] = ((GpSolidFill*)pen->brush)->color;
}
}
}
}
/* draw output image */
if (stat == Ok)
{
stat = alpha_blend_pixels(graphics, output_area.left, output_area.top,
(BYTE*)output_bits, output_width, output_height, output_width * 4,
PixelFormat32bppARGB);
}
heap_free(brush_bits);
heap_free(dyn_dash_pattern);
heap_free(output_bits);
}
GdipDeletePath(flat_path);
return stat;
}
GpStatus SOFTWARE_GdipDrawPath(GpGraphics *graphics, GpPen *pen, GpPath *path) GpStatus SOFTWARE_GdipDrawPath(GpGraphics *graphics, GpPen *pen, GpPath *path)
{ {
GpStatus stat; GpStatus stat;
GpPath *wide_path; GpPath *wide_path;
GpMatrix *transform=NULL; GpMatrix *transform=NULL;
/* Check if the final pen thickness in pixels is too thin. */
if (pen->unit == UnitPixel)
{
if (pen->width < 1.415)
return SOFTWARE_GdipDrawThinPath(graphics, pen, path);
}
else
{
GpPointF points[3] = {{0,0}, {1,0}, {0,1}};
points[1].X = pen->width;
points[2].Y = pen->width;
stat = GdipTransformPoints(graphics, CoordinateSpaceDevice,
CoordinateSpaceWorld, points, 3);
if (stat != Ok)
return stat;
if (((points[1].X-points[0].X)*(points[1].X-points[0].X) +
(points[1].Y-points[0].Y)*(points[1].Y-points[0].Y) < 2.0001) &&
((points[2].X-points[0].X)*(points[2].X-points[0].X) +
(points[2].Y-points[0].Y)*(points[2].Y-points[0].Y) < 2.0001))
return SOFTWARE_GdipDrawThinPath(graphics, pen, path);
}
stat = GdipClonePath(path, &wide_path); stat = GdipClonePath(path, &wide_path);
if (stat != Ok) if (stat != Ok)