Surfaces (Guile-SDL2)

3.6 Surfaces

(use-modules (sdl2 surface))

Procedure: color? c: Return #t if c is a color.

Procedure: color-r c

Procedure: color-g c

Procedure: color-b c

Procedure: color-a c

Procedure: palette? p: Return #t if p is a palette.

Procedure: palette-length palette: Return the number of colors in palette.

Procedure: palette-colors palette: Return the colors in palette.

Procedure: pixel-format? pf: Return #t if pf is a pixel format.

Procedure: pixel-format-name pf: Return the symbolic name of the pixel format pf.

Procedure: pixel-format-palette pf: Return the palette for the pixel format pf.

Procedure: pixel-format-bits-per-pixel pf: Return the number of bits per pixel for the pixel format pf.

Procedure: pixel-format-bytes-per-pixel pf: Return the number of bytes per pixel for the pixel format pf.

Procedure: pixel-format-red-mask pf: Return the bitmask for the red component of a pixel in the pixel format pf.

Procedure: pixel-format-green-mask pf: Return the bitmask for the green component of a pixel in the pixel format pf.

Procedure: pixel-format-blue-mask pf: Return the bitmask for the blue component of a pixel in the pixel format pf.

Procedure: pixel-format-alpha-mask pf: Return the bitmask for the alpha component of a pixel in the pixel format pf.

Procedure: make-rgb-surface width height depth: Create a new SDL surface with the dimensions width and height and depth bits per pixel.

Procedure: bytevector->surface bv width height depth pitch: Convert bv, a bytevector of pixel data with dimensions widthxheight, to an SDL surface. Each pixel is depth bits in size, and each row of pixels is pitch bytes in size.

Procedure: delete-surface! surface: Free the memory used by surface.

Procedure: call-with-surface surface proc: Call proc, passing it surface and deleting surface upon exit of proc.

Procedure: load-bmp file: Create a new surface from the bitmap data in file.

Procedure: surface-width surface: Return the width of surface in pixels.

Procedure: surface-height surface: Return the height of surface in pixels.

Procedure: surface-pitch surface: Return the length of a row of pixels in surface in bytes.

Procedure: surface-pixels surface: Return a bytevector containing the raw pixel data in surface.

Procedure: surface-pixel-format surface: Return the pixel format for surface.

Procedure: convert-surface-format surface format

Convert the pixels in surface to format, a symbol representing a specific pixel format, and return a new surface object.

Valid format types are:

Procedure: blit-surface src src-rect dst dst-rect: Blit the rectangle src-rect from the surface src to dst-rect of the surface dst.

Procedure: blit-scaled src src-rect dst dst-rect: Blit the rectangle src-rect from the surface src to dst-rect of the surface dst, scaling the source to fit the destination.

Procedure: fill-rect dst rect color: Fill rect with color, a 32-bit color encoded as an integer value, in the surface dst.