Documentation
¶
Index ¶
- func BMP(opts ...interface{}) canvas.Writer
- func Draw(c *canvas.Canvas, resolution canvas.Resolution, colorSpace canvas.ColorSpace) *image.RGBA
- func GIF(opts ...interface{}) canvas.Writer
- func JPEG(opts ...interface{}) canvas.Writer
- func PNG(opts ...interface{}) canvas.Writer
- func TIFF(opts ...interface{}) canvas.Writer
- func Write(filename string, c *canvas.Canvas, opts ...interface{}) error
- type GradientImage
- type Rasterizer
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func Draw ¶
func Draw(c *canvas.Canvas, resolution canvas.Resolution, colorSpace canvas.ColorSpace) *image.RGBA
Draw draws the canvas on a new image with given resolution (in dots-per-millimeter). Higher resolution will result in larger images.
Types ¶
type GradientImage ¶
type GradientImage struct {
// contains filtered or unexported fields
}
func NewGradientImage ¶
func NewGradientImage(g canvas.Gradient, zp, size image.Point, res canvas.Resolution) *GradientImage
func (*GradientImage) Bounds ¶
func (img *GradientImage) Bounds() image.Rectangle
func (*GradientImage) ColorModel ¶
func (img *GradientImage) ColorModel() color.Model
type Rasterizer ¶
Rasterizer is a rasterizing renderer.
func FromImage ¶
func FromImage(img draw.Image, resolution canvas.Resolution, colorSpace canvas.ColorSpace) *Rasterizer
FromImage returns a renderer that draws to an existing image.
func New ¶
func New(width, height float64, resolution canvas.Resolution, colorSpace canvas.ColorSpace) *Rasterizer
New returns a renderer that draws to a rasterized image. By default the linear color space is used, which assumes input and output colors are in linearRGB. If the sRGB color space is used for drawing with an average of gamma=2.2, the input and output colors are assumed to be in sRGB (a common assumption) and blending happens in linearRGB. Be aware that for text this results in thin stems for black-on-white (but wide stems for white-on-black).
func (*Rasterizer) Close ¶
func (r *Rasterizer) Close()
func (*Rasterizer) RenderImage ¶
func (r *Rasterizer) RenderImage(img image.Image, m canvas.Matrix)
RenderImage renders an image to the canvas using a transformation matrix.
func (*Rasterizer) RenderPath ¶
RenderPath renders a path to the canvas using a style and a transformation matrix.
func (*Rasterizer) RenderText ¶
func (r *Rasterizer) RenderText(text *canvas.Text, m canvas.Matrix)
RenderText renders a text object to the canvas using a transformation matrix.
func (*Rasterizer) Size ¶
func (r *Rasterizer) Size() (float64, float64)
Size returns the size of the canvas in millimeters.
Source Files