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Restored antialiased lines by emulation using triangle strips

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This commit is contained in:
Yuri Roubinsky 2020-11-24 18:15:10 +03:00
parent d395f70828
commit 3ec972fc95
9 changed files with 126 additions and 75 deletions
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6
doc/classes/CanvasItem.xml
View File

@ -41,6 +41,8 @@
</argument>
<argument index="6" name="width" type="float" default="1.0">
</argument>
<argument index="7" name="antialiased" type="bool" default="false">
</argument>
<description>
Draws an arc between the given angles. The larger the value of [code]point_count[/code], the smoother the curve.
</description>
@ -181,6 +183,8 @@
</argument>
<argument index="2" name="width" type="float" default="1.0">
</argument>
<argument index="3" name="antialiased" type="bool" default="false">
</argument>
<description>
Draws interconnected line segments with a uniform [code]color[/code] and [code]width[/code].
</description>
@ -194,6 +198,8 @@
</argument>
<argument index="2" name="width" type="float" default="1.0">
</argument>
<argument index="3" name="antialiased" type="bool" default="false">
</argument>
<description>
Draws interconnected line segments with a uniform [code]width[/code] and segment-by-segment coloring. Colors assigned to line segments match by index between [code]points[/code] and [code]colors[/code].
</description>

4
scene/gui/graph_edit.cpp
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@ -659,9 +659,9 @@ void GraphEdit::_draw_cos_line(CanvasItem *p_where, const Vector2 &p_from, const
colors.push_back(p_to_color);
#ifdef TOOLS_ENABLED
p_where->draw_polyline_colors(points, colors, Math::floor(2 * EDSCALE));
p_where->draw_polyline_colors(points, colors, Math::floor(2 * EDSCALE), true);
#else
p_where->draw_polyline_colors(points, colors, 2);
p_where->draw_polyline_colors(points, colors, 2, true);
#endif
}

18
scene/main/canvas_item.cpp
View File

@ -742,21 +742,21 @@ void CanvasItem::draw_line(const Point2 &p_from, const Point2 &p_to, const Color
RenderingServer::get_singleton()->canvas_item_add_line(canvas_item, p_from, p_to, p_color, p_width);
}
void CanvasItem::draw_polyline(const Vector<Point2> &p_points, const Color &p_color, float p_width) {
void CanvasItem::draw_polyline(const Vector<Point2> &p_points, const Color &p_color, float p_width, bool p_antialiased) {
ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");
Vector<Color> colors;
colors.push_back(p_color);
RenderingServer::get_singleton()->canvas_item_add_polyline(canvas_item, p_points, colors, p_width);
RenderingServer::get_singleton()->canvas_item_add_polyline(canvas_item, p_points, colors, p_width, p_antialiased);
}
void CanvasItem::draw_polyline_colors(const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width) {
void CanvasItem::draw_polyline_colors(const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width, bool p_antialiased) {
ERR_FAIL_COND_MSG(!drawing, "Drawing is only allowed inside NOTIFICATION_DRAW, _draw() function or 'draw' signal.");
RenderingServer::get_singleton()->canvas_item_add_polyline(canvas_item, p_points, p_colors, p_width);
RenderingServer::get_singleton()->canvas_item_add_polyline(canvas_item, p_points, p_colors, p_width, p_antialiased);
}
void CanvasItem::draw_arc(const Vector2 &p_center, float p_radius, float p_start_angle, float p_end_angle, int p_point_count, const Color &p_color, float p_width) {
void CanvasItem::draw_arc(const Vector2 &p_center, float p_radius, float p_start_angle, float p_end_angle, int p_point_count, const Color &p_color, float p_width, bool p_antialiased) {
Vector<Point2> points;
points.resize(p_point_count);
const float delta_angle = p_end_angle - p_start_angle;
@ -765,7 +765,7 @@ void CanvasItem::draw_arc(const Vector2 &p_center, float p_radius, float p_start
points.set(i, p_center + Vector2(Math::cos(theta), Math::sin(theta)) * p_radius);
}
draw_polyline(points, p_color, p_width);
draw_polyline(points, p_color, p_width, p_antialiased);
}
void CanvasItem::draw_multiline(const Vector<Point2> &p_points, const Color &p_color, float p_width) {
@ -1144,9 +1144,9 @@ void CanvasItem::_bind_methods() {
//ClassDB::bind_method(D_METHOD("get_transform"),&CanvasItem::get_transform);
ClassDB::bind_method(D_METHOD("draw_line", "from", "to", "color", "width"), &CanvasItem::draw_line, DEFVAL(1.0));
ClassDB::bind_method(D_METHOD("draw_polyline", "points", "color", "width"), &CanvasItem::draw_polyline, DEFVAL(1.0));
ClassDB::bind_method(D_METHOD("draw_polyline_colors", "points", "colors", "width"), &CanvasItem::draw_polyline_colors, DEFVAL(1.0));
ClassDB::bind_method(D_METHOD("draw_arc", "center", "radius", "start_angle", "end_angle", "point_count", "color", "width"), &CanvasItem::draw_arc, DEFVAL(1.0));
ClassDB::bind_method(D_METHOD("draw_polyline", "points", "color", "width", "antialiased"), &CanvasItem::draw_polyline, DEFVAL(1.0), DEFVAL(false));
ClassDB::bind_method(D_METHOD("draw_polyline_colors", "points", "colors", "width", "antialiased"), &CanvasItem::draw_polyline_colors, DEFVAL(1.0), DEFVAL(false));
ClassDB::bind_method(D_METHOD("draw_arc", "center", "radius", "start_angle", "end_angle", "point_count", "color", "width", "antialiased"), &CanvasItem::draw_arc, DEFVAL(1.0), DEFVAL(false));
ClassDB::bind_method(D_METHOD("draw_multiline", "points", "color", "width"), &CanvasItem::draw_multiline, DEFVAL(1.0));
ClassDB::bind_method(D_METHOD("draw_multiline_colors", "points", "colors", "width"), &CanvasItem::draw_multiline_colors, DEFVAL(1.0));
ClassDB::bind_method(D_METHOD("draw_rect", "rect", "color", "filled", "width"), &CanvasItem::draw_rect, DEFVAL(true), DEFVAL(1.0));

6
scene/main/canvas_item.h
View File

@ -331,9 +331,9 @@ public:
/* DRAWING API */
void draw_line(const Point2 &p_from, const Point2 &p_to, const Color &p_color, float p_width = 1.0);
void draw_polyline(const Vector<Point2> &p_points, const Color &p_color, float p_width = 1.0);
void draw_polyline_colors(const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width = 1.0);
void draw_arc(const Vector2 &p_center, float p_radius, float p_start_angle, float p_end_angle, int p_point_count, const Color &p_color, float p_width = 1.0);
void draw_polyline(const Vector<Point2> &p_points, const Color &p_color, float p_width = 1.0, bool p_antialiased = false);
void draw_polyline_colors(const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width = 1.0, bool p_antialiased = false);
void draw_arc(const Vector2 &p_center, float p_radius, float p_start_angle, float p_end_angle, int p_point_count, const Color &p_color, float p_width = 1.0, bool p_antialiased = false);
void draw_multiline(const Vector<Point2> &p_points, const Color &p_color, float p_width = 1.0);
void draw_multiline_colors(const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width = 1.0);
void draw_rect(const Rect2 &p_rect, const Color &p_color, bool p_filled = true, float p_width = 1.0);

159
servers/rendering/rendering_server_canvas.cpp
View File

@ -540,59 +540,60 @@ void RenderingServerCanvas::canvas_item_add_line(RID p_item, const Point2 &p_fro
}
}
void RenderingServerCanvas::canvas_item_add_polyline(RID p_item, const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width) {
void RenderingServerCanvas::canvas_item_add_polyline(RID p_item, const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width, bool p_antialiased) {
ERR_FAIL_COND(p_points.size() < 2);
Item *canvas_item = canvas_item_owner.getornull(p_item);
ERR_FAIL_COND(!canvas_item);
Vector<int> indices;
int pc = p_points.size();
int pc2 = pc * 2;
Vector2 prev_t;
int j2;
Item::CommandPolygon *pline = canvas_item->alloc_command<Item::CommandPolygon>();
ERR_FAIL_COND(!pline);
if (true || p_width <= 1) {
#define TODO make thick lines possible
Vector<int> indices;
int pc = p_points.size();
indices.resize((pc - 1) * 2);
{
int *iptr = indices.ptrw();
for (int i = 0; i < (pc - 1); i++) {
iptr[i * 2 + 0] = i;
iptr[i * 2 + 1] = i + 1;
}
}
PackedColorArray colors;
PackedVector2Array points;
pline->primitive = RS::PRIMITIVE_LINES;
pline->polygon.create(indices, p_points, p_colors);
} else {
#if 0
//make a trianglestrip for drawing the line...
Vector2 prev_t;
pline->triangles.resize(p_points.size() * 2);
if (p_antialiased) {
pline->lines.resize(p_points.size() * 2);
}
colors.resize(pc2);
points.resize(pc2);
if (p_colors.size() == 0) {
pline->triangle_colors.push_back(Color(1, 1, 1, 1));
if (p_antialiased) {
pline->line_colors.push_back(Color(1, 1, 1, 1));
}
} else if (p_colors.size() == 1) {
pline->triangle_colors = p_colors;
pline->line_colors = p_colors;
} else {
if (p_colors.size() != p_points.size()) {
pline->triangle_colors.push_back(p_colors[0]);
pline->line_colors.push_back(p_colors[0]);
} else {
pline->triangle_colors.resize(pline->triangles.size());
pline->line_colors.resize(pline->lines.size());
}
}
Vector2 *points_ptr = points.ptrw();
Color *colors_ptr = colors.ptrw();
for (int i = 0; i < p_points.size(); i++) {
if (p_antialiased) {
PackedColorArray colors_top;
PackedVector2Array points_top;
colors_top.resize(pc2);
points_top.resize(pc2);
PackedColorArray colors_bottom;
PackedVector2Array points_bottom;
colors_bottom.resize(pc2);
points_bottom.resize(pc2);
Item::CommandPolygon *pline_top = canvas_item->alloc_command<Item::CommandPolygon>();
ERR_FAIL_COND(!pline_top);
Item::CommandPolygon *pline_bottom = canvas_item->alloc_command<Item::CommandPolygon>();
ERR_FAIL_COND(!pline_bottom);
//make three trianglestrip's for drawing the antialiased line...
Vector2 *points_top_ptr = points_top.ptrw();
Vector2 *points_bottom_ptr = points_bottom.ptrw();
Color *colors_top_ptr = colors_top.ptrw();
Color *colors_bottom_ptr = colors_bottom.ptrw();
for (int i = 0, j = 0; i < pc; i++, j += 2) {
Vector2 t;
if (i == p_points.size() - 1) {
if (i == pc - 1) {
t = prev_t;
} else {
t = (p_points[i + 1] - p_points[i]).normalized().tangent();
@ -601,29 +602,73 @@ void RenderingServerCanvas::canvas_item_add_polyline(RID p_item, const Vector<Po
}
}
j2 = j + 1;
Vector2 tangent = ((t + prev_t).normalized()) * p_width * 0.5;
Vector2 pos = p_points[i];
if (p_antialiased) {
pline->lines.write[i] = p_points[i] + tangent;
pline->lines.write[p_points.size() * 2 - i - 1] = p_points[i] - tangent;
if (pline->line_colors.size() > 1) {
pline->line_colors.write[i] = p_colors[i];
pline->line_colors.write[p_points.size() * 2 - i - 1] = p_colors[i];
}
}
points_ptr[j] = pos + tangent;
points_ptr[j2] = pos - tangent;
pline->triangles.write[i * 2 + 0] = p_points[i] + tangent;
pline->triangles.write[i * 2 + 1] = p_points[i] - tangent;
points_top_ptr[j] = pos + tangent + tangent;
points_top_ptr[j2] = pos + tangent;
if (pline->triangle_colors.size() > 1) {
pline->triangle_colors.write[i * 2 + 0] = p_colors[i];
pline->triangle_colors.write[i * 2 + 1] = p_colors[i];
}
points_bottom_ptr[j] = pos - tangent;
points_bottom_ptr[j2] = pos - tangent - tangent;
Color color = p_colors[i];
Color color2 = Color(color.r, color.g, color.b, 0);
colors_ptr[j] = color;
colors_ptr[j2] = color;
colors_top_ptr[j] = color2;
colors_top_ptr[j2] = color;
colors_bottom_ptr[j] = color;
colors_bottom_ptr[j2] = color2;
prev_t = t;
}
pline_top->primitive = RS::PRIMITIVE_TRIANGLE_STRIP;
pline_top->polygon.create(indices, points_top, colors_top);
pline_bottom->primitive = RS::PRIMITIVE_TRIANGLE_STRIP;
pline_bottom->polygon.create(indices, points_bottom, colors_bottom);
} else {
//make a trianglestrip for drawing the line...
for (int i = 0, j = 0; i < pc; i++, j += 2) {
Vector2 t;
if (i == pc - 1) {
t = prev_t;
} else {
t = (p_points[i + 1] - p_points[i]).normalized().tangent();
if (i == 0) {
prev_t = t;
}
}
j2 = j + 1;
Vector2 tangent = ((t + prev_t).normalized()) * p_width * 0.5;
Vector2 pos = p_points[j];
Color color = p_colors[j2];
points_ptr[j] = pos + tangent;
points_ptr[j2] = pos - tangent;
colors_ptr[j] = color;
colors_ptr[j2] = color;
prev_t = t;
}
#endif
}
pline->primitive = RS::PRIMITIVE_TRIANGLE_STRIP;
pline->polygon.create(indices, points, colors);
}
void RenderingServerCanvas::canvas_item_add_multiline(RID p_item, const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width) {

2
servers/rendering/rendering_server_canvas.h
View File

@ -192,7 +192,7 @@ public:
void canvas_item_set_update_when_visible(RID p_item, bool p_update);
void canvas_item_add_line(RID p_item, const Point2 &p_from, const Point2 &p_to, const Color &p_color, float p_width = 1.0);
void canvas_item_add_polyline(RID p_item, const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width = 1.0);
void canvas_item_add_polyline(RID p_item, const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width = 1.0, bool p_antialiased = false);
void canvas_item_add_multiline(RID p_item, const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width = 1.0);
void canvas_item_add_rect(RID p_item, const Rect2 &p_rect, const Color &p_color);
void canvas_item_add_circle(RID p_item, const Point2 &p_pos, float p_radius, const Color &p_color);

2
servers/rendering/rendering_server_raster.h
View File

@ -717,7 +717,7 @@ public:
BIND2(canvas_item_set_draw_behind_parent, RID, bool)
BIND5(canvas_item_add_line, RID, const Point2 &, const Point2 &, const Color &, float)
BIND4(canvas_item_add_polyline, RID, const Vector<Point2> &, const Vector<Color> &, float)
BIND5(canvas_item_add_polyline, RID, const Vector<Point2> &, const Vector<Color> &, float, bool)
BIND4(canvas_item_add_multiline, RID, const Vector<Point2> &, const Vector<Color> &, float)
BIND3(canvas_item_add_rect, RID, const Rect2 &, const Color &)
BIND4(canvas_item_add_circle, RID, const Point2 &, float, const Color &)

2
servers/rendering/rendering_server_wrap_mt.h
View File

@ -618,7 +618,7 @@ public:
FUNC2(canvas_item_set_draw_behind_parent, RID, bool)
FUNC5(canvas_item_add_line, RID, const Point2 &, const Point2 &, const Color &, float)
FUNC4(canvas_item_add_polyline, RID, const Vector<Point2> &, const Vector<Color> &, float)
FUNC5(canvas_item_add_polyline, RID, const Vector<Point2> &, const Vector<Color> &, float, bool)
FUNC4(canvas_item_add_multiline, RID, const Vector<Point2> &, const Vector<Color> &, float)
FUNC3(canvas_item_add_rect, RID, const Rect2 &, const Color &)
FUNC4(canvas_item_add_circle, RID, const Point2 &, float, const Color &)

2
servers/rendering_server.h
View File

@ -1175,7 +1175,7 @@ public:
};
virtual void canvas_item_add_line(RID p_item, const Point2 &p_from, const Point2 &p_to, const Color &p_color, float p_width = 1.0) = 0;
virtual void canvas_item_add_polyline(RID p_item, const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width = 1.0) = 0;
virtual void canvas_item_add_polyline(RID p_item, const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width = 1.0, bool p_antialiased = false) = 0;
virtual void canvas_item_add_multiline(RID p_item, const Vector<Point2> &p_points, const Vector<Color> &p_colors, float p_width = 1.0) = 0;
virtual void canvas_item_add_rect(RID p_item, const Rect2 &p_rect, const Color &p_color) = 0;
virtual void canvas_item_add_circle(RID p_item, const Point2 &p_pos, float p_radius, const Color &p_color) = 0;