Draw
Draw shapes and lines on images.
note
Draw operations modify the image in-place. Make a copy first if you need to preserve the original.
Function Mapping
| libvips C | Dart Binding | Description |
|---|---|---|
vips_draw_rect() | drawBindings.drawRect() | Draw rectangle |
vips_draw_rect1() | drawBindings.drawRect1() | Draw rectangle (single value) |
vips_draw_circle() | drawBindings.drawCircle() | Draw circle |
vips_draw_circle1() | drawBindings.drawCircle1() | Draw circle (single value) |
vips_draw_line() | drawBindings.drawLine() | Draw line |
vips_draw_line1() | drawBindings.drawLine1() | Draw line (single value) |
vips_draw_mask() | drawBindings.drawMask() | Draw with mask |
vips_draw_mask1() | drawBindings.drawMask1() | Draw with mask (single value) |
vips_draw_image() | drawBindings.drawImage() | Composite image |
vips_draw_flood() | drawBindings.drawFlood() | Flood fill |
vips_draw_flood1() | drawBindings.drawFlood1() | Flood fill (single value) |
vips_draw_smudge() | drawBindings.drawSmudge() | Smudge region |
drawRect
Draw a filled rectangle.
// drawRect(image, ink, n, left, top, width, height)
// ink: pointer to double array, n: number of values
drawBindings.drawRect(image, inkPtr, 3, 100, 100, 200, 150);
// drawRect1 for single value (grayscale)
drawBindings.drawRect1(image, 255.0, 100, 100, 200, 150);
drawCircle
Draw a circle.
// drawCircle(image, ink, n, cx, cy, radius)
drawBindings.drawCircle(image, inkPtr, 3, 200, 200, 50);
// drawCircle1 for single value
drawBindings.drawCircle1(image, 255.0, 200, 200, 50);
drawLine
Draw a line.
// drawLine(image, ink, n, x1, y1, x2, y2)
drawBindings.drawLine(image, inkPtr, 3, 0, 0, 400, 300);
// drawLine1 for single value
drawBindings.drawLine1(image, 255.0, 0, 0, 400, 300);
drawImage
Composite another image onto this one.
// drawImage(image, sub, x, y)
drawBindings.drawImage(image, overlayImage, 100, 50);
drawFlood
Flood fill from a point.
// drawFlood(image, ink, n, x, y)
drawBindings.drawFlood(image, inkPtr, 3, 200, 200);
// drawFlood1 for single value
drawBindings.drawFlood1(image, 255.0, 200, 200);