Graphics class Graphics

Provides the core 2D rendering capabilities for the Bullseye2D engine.

Most applications will interact with this class through the app.gfx instance provided by the App class.

Constructors

Graphics(HTMLCanvasElement _canvas, {int batchCapacityInBytes = 65536})
Initializes the graphics system with the given HTML canvas element.

Properties

gl ↔ GL2
A 2D rendering module.
latefinal
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

clear([double? r, double? g, double? b, double? a]) → void
Clears the drawing canvas with the specified color.
dispose() → void
Releases WebGL resources used by the graphics system.
drawCircle(double x, double y, double radius, {int segments = 32, ColorList? colors}) → void
Draws a filled circle centered at (x, y) with the given radius.
drawImage(Images frames, [int frame = 0, double x = 0.0, double y = 0.0, double rotation = 0.0, double scaleX = 1.0, double scaleY = 1.0, ColorList? colors]) → void
Draws a specific frame from an Images sequence (sprite sheet or animation).
drawLine(double x1, double y1, double x2, double y2, {ColorList? colors}) → void
Draws a line segment between (x1, y1) and (x2, y2).
drawLines(List<double> vertices, {ColorList? colors}) → void
Draws a series of connected line segments (a line strip).
drawOval(double x, double y, double radiusX, double radiusY, {int segments = 32, ColorList? colors}) → void
Draws a filled oval (ellipse) centered at (x, y).
drawPoint(double x, double y) → void
Draws a single point at the specified coordinates (x, y).
drawPoly(List<double> vertices, {List<double>? uvs, Texture? texture, ColorList? colors}) → void
Draws a filled polygon defined by a list of vertices.
drawRect(double x, double y, double width, double height, {Texture? texture, ColorList? colors}) → void
Draws a filled rectangle at (x, y) with the given width and height.
drawText(BitmapFont font, String text, {dynamic x = 0.0, dynamic y = 0.0, dynamic alignX = 0.0, dynamic alignY = 0.0, dynamic scaleX = 1.0, dynamic scaleY = 1.0, dynamic alignXByLine = true, ColorList? colors}) → Point<num>
Draws text using the specified BitmapFont and rendering parameters.
drawTexture(Texture tex, {double? srcX, double? srcY, double? srcWidth, double? srcHeight, double? x, double? y, double? width, double? height, ColorList? colors}) → void
Draws a Texture or a portion of it onto a quad.
drawTriangle(double x1, double y1, double x2, double y2, double x3, double y3, double u1, double v1, double u2, double v2, double u3, double v3, {Texture? texture, ColorList? colors}) → void
Draws a filled triangle with the specified vertex coordinates and texture coordinates.
flush() → void
Flushes all batched drawing commands to the GPU.
measureText(BitmapFont font, String text) → Point<num>
Measures the bounding box of a given text string when rendered with the specified BitmapFont.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
popMatrix() → void
Pops the top transformation matrix from the stack and makes it current.
pushMatrix() → void
Pushes a copy of the current transformation matrix onto the matrix stack.
resetMatrix() → void
Resets the current transformation matrix to the identity matrix.
resetScissor() → void
Disables scissor testing.
rotate(double degrees) → void
Rotates the current transformation matrix by the given angle in degrees.
scale(double sx, double sy) → void
Scales the current transformation matrix by the given factors.
set2DProjection({double x = 0.0, double y = 0.0, double? width, double? height}) → void
Configures an orthographic 2D projection matrix.
setBlendMode(BlendMode mode) → void
Sets the blend mode for subsequent drawing operations.
setColor([double r = 1.0, double g = 1.0, double b = 1.0, double a = 1.0]) → void
Sets the current drawing color using individual RGBA components.
setColorFrom(Color color) → void
Sets the current drawing color using a Color object.
setLineWidth(double width) → void
Sets the width for lines drawn by drawLine and drawLines.
setProjectionMatrix(Matrix4 matrix) → void
Sets the projection matrix used by the shaders.
setScissor(int x, int y, int width, int height) → void
Enables and defines a scissor rectangle for clipping rendering.
setViewport(int x, int y, int width, int height) → void
Sets the viewport.
toString() → String
A string representation of this object.
inherited
transform(double ix, double iy, double jx, double jy, double tx, double ty) → void
Applies a 2D affine transformation to the current matrix.
translate(double tx, double ty) → void
Translates the current transformation matrix by the given offsets.

Operators

operator ==(Object other) → bool
The equality operator.
inherited