6 files changed, 445 insertions, 0 deletions
diff --git a/doc/graphics/animation.texi b/doc/graphics/animation.texi
new file mode 100644
index 0000000..c872263
--- /dev/null
+++ b/doc/graphics/animation.texi
@@ -0,0 +1,84 @@
+@node Animations
+@section Animations
+
+Animations are sequences of textures and/or texture regions. Common
+uses for animations are to give the illusion that a character is
+walking across the screen or swinging their sword at a
+monster. Animator objects are used to control the playback of an
+animation.
+
+@anchor{2d animation animation-frame-duration}@defspec animation-frame-duration
+@end defspec
+
+@anchor{2d animation animation-frames}@defspec animation-frames
+@end defspec
+
+@anchor{2d animation animation-loop?}@defspec animation-loop?
+@end defspec
+
+@anchor{2d animation animation?}@defspec animation?
+@end defspec
+
+@anchor{2d animation animator-animation}@defspec animator-animation
+@end defspec
+
+@anchor{2d animation animator-frame}@defspec animator-frame
+@end defspec
+
+@anchor{2d animation animator-playing?}@defspec animator-playing?
+@end defspec
+
+@anchor{2d animation animator-time}@defspec animator-time
+@end defspec
+
+@anchor{2d animation animator?}@defspec animator?
+@end defspec
+
+@anchor{2d animation make-animation}@defspec make-animation
+@end defspec
+
+@anchor{2d animation animation-duration}@defun animation-duration animation
+Return the total duration of ANIMATION in ticks.
+
+@end defun
+
+@anchor{2d animation animation-frame}@defun animation-frame animation index
+Return the texture for the given frame INDEX of ANIMATION.
+
+@end defun
+
+@anchor{2d animation animation-length}@defun animation-length animation
+Return the number of frames in ANIMATION.
+
+@end defun
+
+@anchor{2d animation animator-frame-complete?}@defun animator-frame-complete? animator
+Return #t when ANIMATOR is done displaying the current frame.
+
+@end defun
+
+@anchor{2d animation animator-next!}@defun animator-next! animator
+Advance ANIMATOR to the next frame of its animation.
+
+@end defun
+
+@anchor{2d animation animator-next-frame}@defun animator-next-frame animator
+Return the next frame index for ANIMATOR.
+
+@end defun
+
+@anchor{2d animation animator-texture}@defun animator-texture animator
+Return a texture for the ANIMATOR's current frame.
+
+@end defun
+
+@anchor{2d animation animator-update!}@defun animator-update! animator
+Increment the frame time for the ANIMATOR and advance to the next frame
+when necessary.
+
+@end defun
+
+@anchor{2d animation make-animator}@defun make-animator animation
+Create a new animator for ANIMATION.
+
+@end defun
diff --git a/doc/graphics/color.texi b/doc/graphics/color.texi
new file mode 100644
index 0000000..99e69ba
--- /dev/null
+++ b/doc/graphics/color.texi
@@ -0,0 +1,64 @@
+@node Colors
+@section Colors
+
+Colors store RGBA data in OpenGL format. Each color channel has a
+value in the range [0, 1].
+
+@anchor{2d color make-color}@defspec make-color
+@end defspec
+
+@anchor{2d color color?}@defspec color?
+@end defspec
+
+@anchor{2d color color-r}@defspec color-r
+@end defspec
+
+@anchor{2d color color-g}@defspec color-g
+@end defspec
+
+@anchor{2d color color-b}@defspec color-b
+@end defspec
+
+@anchor{2d color color-a}@defspec color-a
+@end defspec
+
+@anchor{2d color use-color}@defun use-color color
+Set the current OpenGL color state to the contents of COLOR.
+
+@end defun
+
+A lot of people are used to working with colors as hexadecimal values,
+so the following procedures are provided to convert hexadecimal color
+codes into color objects.
+
+@anchor{2d color rgba}@defun rgba color-code
+Translate an RGBA format string COLOR-CODE into a color object.  For
+example: #xffffffff will return a color with RGBA values 1, 1, 1, 1.
+
+@end defun
+
+@anchor{2d color rgb}@defun rgb color-code
+Translate an RGB format string COLOR-CODE into a color object.  For
+example: #xffffff will return a color with RGBA values 1, 1, 1, 1.
+
+@end defun
+
+Commonly used colors are predefined for convenience.
+
+@anchor{2d color white}@defvar white
+@end defvar
+
+@anchor{2d color black}@defvar black
+@end defvar
+
+@anchor{2d color red}@defvar red
+@end defvar
+
+@anchor{2d color green}@defvar green
+@end defvar
+
+@anchor{2d color blue}@defvar blue
+@end defvar
+
+@anchor{2d color magenta}@defvar magenta
+@end defvar
diff --git a/doc/graphics/font.texi b/doc/graphics/font.texi
new file mode 100644
index 0000000..59057a2
--- /dev/null
+++ b/doc/graphics/font.texi
@@ -0,0 +1,70 @@
+@node Fonts
+@section Fonts
+
+Guile-2D can render TTF fonts via the FTGL library.
+
+@anchor{2d font font-ftgl-font}@defspec font-ftgl-font
+@end defspec
+
+@anchor{2d font font-size}@defspec font-size
+@end defspec
+
+@anchor{2d font font?}@defspec font?
+@end defspec
+
+@anchor{2d font make-font}@defspec make-font
+@end defspec
+
+@anchor{2d font set-textbox-color!}@defspec set-textbox-color!
+@end defspec
+
+@anchor{2d font set-textbox-position!}@defspec set-textbox-position!
+@end defspec
+
+@anchor{2d font set-textbox-text!}@defspec set-textbox-text!
+@end defspec
+
+@anchor{2d font textbox-alignment}@defspec textbox-alignment
+@end defspec
+
+@anchor{2d font textbox-color}@defspec textbox-color
+@end defspec
+
+@anchor{2d font textbox-font}@defspec textbox-font
+@end defspec
+
+@anchor{2d font textbox-layout}@defspec textbox-layout
+@end defspec
+
+@anchor{2d font textbox-line-length}@defspec textbox-line-length
+@end defspec
+
+@anchor{2d font textbox-position}@defspec textbox-position
+@end defspec
+
+@anchor{2d font textbox-text}@defspec textbox-text
+@end defspec
+
+@anchor{2d font textbox?}@defspec textbox?
+@end defspec
+
+@anchor{2d font draw-font}@defun draw-font font text
+Renders the string text using the given font.
+
+@end defun
+
+@anchor{2d font draw-textbox}@defun draw-textbox textbox
+Draw TEXTBOX.
+
+@end defun
+
+@anchor{2d font load-font}@defun load-font filename size
+Load a font from FILENAME with the given SIZE in points.
+
+@end defun
+
+@anchor{2d font make-textbox}@defun make-textbox font text position color alignment line-length
+Create a textbox that will draw TEXT with the given FONT, at vector
+POSITION, with ALIGNMENT, and a maximum LINE-LENGTH.
+
+@end defun
diff --git a/doc/graphics/sprite.texi b/doc/graphics/sprite.texi
new file mode 100644
index 0000000..9b20e3f
--- /dev/null
+++ b/doc/graphics/sprite.texi
@@ -0,0 +1,121 @@
+@node Sprites
+@section Sprites
+
+Sprites are typically the most important part of a 2D game. Sprites
+represent a texture with a specific color, position, rotation and
+scale. Sprites can render texture objects or animations.
+
+@anchor{2d sprite set-sprite-batch-size!}@defspec set-sprite-batch-size!
+@end defspec
+
+@anchor{2d sprite set-sprite-batch-texture!}@defspec set-sprite-batch-texture!
+@end defspec
+
+@anchor{2d sprite set-sprite-drawable!}@defspec set-sprite-drawable!
+@end defspec
+
+@anchor{2d sprite set-sprite-vertices!}@defspec set-sprite-vertices!
+@end defspec
+
+@anchor{2d sprite sprite-anchor}@defspec sprite-anchor
+@end defspec
+
+@anchor{2d sprite sprite-batch-max-size}@defspec sprite-batch-max-size
+@end defspec
+
+@anchor{2d sprite sprite-batch-size}@defspec sprite-batch-size
+@end defspec
+
+@anchor{2d sprite sprite-batch-texture}@defspec sprite-batch-texture
+@end defspec
+
+@anchor{2d sprite sprite-batch-vertices}@defspec sprite-batch-vertices
+@end defspec
+
+@anchor{2d sprite sprite-batch?}@defspec sprite-batch?
+@end defspec
+
+@anchor{2d sprite sprite-color}@defspec sprite-color
+@end defspec
+
+@anchor{2d sprite sprite-drawable}@defspec sprite-drawable
+@end defspec
+
+@anchor{2d sprite sprite-position}@defspec sprite-position
+@end defspec
+
+@anchor{2d sprite sprite-rotation}@defspec sprite-rotation
+@end defspec
+
+@anchor{2d sprite sprite-scale}@defspec sprite-scale
+@end defspec
+
+@anchor{2d sprite sprite-vertices}@defspec sprite-vertices
+@end defspec
+
+@anchor{2d sprite sprite?}@defspec sprite?
+@end defspec
+
+@anchor{2d sprite with-sprite-batch}@defspec with-sprite-batch batch body ...
+@end defspec
+
+@anchor{2d sprite animated-sprite?}@defun animated-sprite? sprite
+Return #t if SPRITE has an animation as its drawable object.
+
+@end defun
+
+@anchor{2d sprite draw-sprite}@defun draw-sprite sprite
+Render SPRITE to the screen.  A sprite batch will be used if one is
+currently bound.
+
+@end defun
+
+@anchor{2d sprite load-sprite}@defun load-sprite filename [#:position] [#:scale] [#:rotation] [#:color] [#:anchor]
+Load a sprite from the file at FILENAME.  See make-sprite for optional
+keyword arguments.
+
+@end defun
+
+@anchor{2d sprite make-sprite}@defun make-sprite drawable [#:position] [#:scale] [#:rotation] [#:color] [#:anchor]
+Create a new sprite object.  DRAWABLE is either a texture or animation
+object.  All keyword arguments are optional.  POSITION is a vector2
+object with a default of (0, 0).  SCALE is a vector2 object that
+describes how much DRAWABLE should be strected on the x and y axes, with
+a default of 1x scale.  ROTATION is an angle in degrees with a default
+of 0.  COLOR is a color object with a default of white.  ANCHOR is
+either a vector2 that represents the center point of the sprite, or
+'center which will place the anchor at the center of DRAWABLE.  Sprites
+are centered by default.
+
+@end defun
+
+@anchor{2d sprite make-sprite-batch}@defun make-sprite-batch [max-size]
+Creates a new sprite batch.  The default max-size is 1000.
+
+@end defun
+
+@anchor{2d sprite set-sprite-anchor!}@defun set-sprite-anchor! sprite value
+@end defun
+
+@anchor{2d sprite set-sprite-color!}@defun set-sprite-color! sprite value
+@end defun
+
+@anchor{2d sprite set-sprite-position!}@defun set-sprite-position! sprite value
+@end defun
+
+@anchor{2d sprite set-sprite-rotation!}@defun set-sprite-rotation! sprite value
+@end defun
+
+@anchor{2d sprite set-sprite-scale!}@defun set-sprite-scale! sprite value
+@end defun
+
+@anchor{2d sprite sprite-batch-draw}@defun sprite-batch-draw . args
+Add a textured quad to the current sprite batch.  X, Y, WIDTH, and
+HEIGHT represent the quad in pixels.  ORIGIN-X and ORIGIN-Y represent
+the center point of the quad which is used for rotation.  SCALE-X and
+SCALE-Y are the scaling factors for the x and y axis, respectively.
+ROTATION is the angle in degrees to rotate the quad.  U, V, U2, and V2
+represent the texture coordinate region to texture the quad with.  COLOR
+is a color object.
+
+@end defun
diff --git a/doc/graphics/texture.texi b/doc/graphics/texture.texi
new file mode 100644
index 0000000..2ac1503
--- /dev/null
+++ b/doc/graphics/texture.texi
@@ -0,0 +1,65 @@
+@node Textures
+@section Textures
+
+Textures are images loaded in graphics memory. Guile-2D supports many
+texture formats via the FreeImage library. A texture object can
+describe a full image or a rectangular section of an image.
+
+@anchor{2d texture make-texture}@defun make-texture id parent width height s1 t1 s2 t2
+Create a new texture object.  ID is the OpenGL texture id.  PARENT is a
+texture object (if this texture only represents a region of another
+texture) or #f.  WIDTH and HEIGHT are the texture dimensions in pixels.
+S1, T1, S2, and T2 are the OpenGL texture coordinates representing the
+area of the texture that will be rendered.
+
+@end defun
+
+@anchor{2d texture make-texture-region}@defun make-texture-region texture x y width height
+Creates new texture region object.  TEXTURE is the region's parent
+texture.  X, Y, WIDTH, and HEIGHT represent the region of the texture
+that will be rendered, in pixels.
+
+@end defun
+
+@anchor{2d texture load-texture}@defun load-texture filename
+Load a texture from an image file at FILENAME.
+
+@end defun
+
+@anchor{2d texture texture?}@defspec texture?
+@end defspec
+
+@anchor{2d texture texture-region?}@defun texture-region? texture
+Return #t if TEXTURE has a parent texture.
+
+@end defun
+
+@anchor{2d texture texture-id}@defspec texture-id
+@end defspec
+
+@anchor{2d texture texture-width}@defspec texture-width
+@end defspec
+
+@anchor{2d texture texture-height}@defspec texture-height
+@end defspec
+
+@anchor{2d texture texture-s1}@defspec texture-s1
+@end defspec
+
+@anchor{2d texture texture-t1}@defspec texture-t1
+@end defspec
+
+@anchor{2d texture texture-s2}@defspec texture-s2
+@end defspec
+
+@anchor{2d texture texture-t2}@defspec texture-t2
+@end defspec
+
+@anchor{2d texture surface->texture}@defvar surface->texture
+[unbound!]
+@end defvar
+
+@anchor{2d texture draw-texture}@defun draw-texture texture x y [color]
+Render a textured quad in GL immediate mode.
+
+@end defun
diff --git a/doc/graphics/tileset.texi b/doc/graphics/tileset.texi
new file mode 100644
index 0000000..1f229dc
--- /dev/null
+++ b/doc/graphics/tileset.texi
@@ -0,0 +1,41 @@
+@node Tilesets
+@section Tilesets
+
+In most 2D games, the game world is composed of many small,
+rectangular pieces called tiles. In Guile-2D, tilesets are used to
+encapsulate a group of uniformly sized texture regions that come from
+a single parent texture.
+
+@anchor{2d tileset make-tileset}@defun make-tileset texture width height [#:margin] [#:spacing]
+Return a new tileset that is built by splitting TEXTURE into tiles.
+
+@end defun
+
+@anchor{2d tileset load-tileset}@defun load-tileset filename width height [#:margin] [#:spacing]
+Return a new tileset that is built by loading the texture at FILENAME
+and splitting the texture into tiles.
+
+@end defun
+
+@anchor{2d tileset tileset?}@defspec tileset?
+@end defspec
+
+@anchor{2d tileset tileset-tiles}@defspec tileset-tiles
+@end defspec
+
+@anchor{2d tileset tileset-width}@defspec tileset-width
+@end defspec
+
+@anchor{2d tileset tileset-height}@defspec tileset-height
+@end defspec
+
+@anchor{2d tileset tileset-margin}@defspec tileset-margin
+@end defspec
+
+@anchor{2d tileset tileset-spacing}@defspec tileset-spacing
+@end defspec
+
+@anchor{2d tileset tileset-ref}@defun tileset-ref tileset i
+Return the tile texture of TILESET at index I.
+
+@end defun