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-rw-r--r--sdl2/bindings/ttf.scm76
-rw-r--r--sdl2/ttf.scm93
2 files changed, 169 insertions, 0 deletions
diff --git a/sdl2/bindings/ttf.scm b/sdl2/bindings/ttf.scm
new file mode 100644
index 0000000..9808fd4
--- /dev/null
+++ b/sdl2/bindings/ttf.scm
@@ -0,0 +1,76 @@
+;;; guile-sdl2 --- FFI bindings for SDL2
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; This file is part of guile-sdl2.
+;;;
+;;; Guile-sdl2 is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation; either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; Guile-sdl2 is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with guile-sdl2. If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; Low-level FFI bindings for SDL2_ttf.
+;;
+;;; Code:
+
+(define-module (sdl2 bindings ttf)
+ #:use-module (system foreign)
+ #:use-module (sdl2 config)
+ #:use-module (sdl2 bindings))
+
+(define sdl-ttf-func
+ (let ((lib (dynamic-link %libsdl2-ttf)))
+ (lambda (return-type function-name arg-types)
+ "Return a procedure for the foreign function FUNCTION-NAME in
+the SDL2_ttf shared library. That function must return a value of
+RETURN-TYPE and accept arguments of ARG-TYPES."
+ (pointer->procedure return-type
+ (dynamic-func function-name lib)
+ arg-types))))
+
+(define-syntax-rule (define-foreign name return-type func-name arg-types)
+ (define-public name
+ (sdl-ttf-func return-type func-name arg-types)))
+
+(define-foreign ttf-init
+ int "TTF_Init" '())
+
+(define-foreign ttf-quit
+ void "TTF_Quit" '())
+
+(define-foreign ttf-open-font
+ '* "TTF_OpenFont" (list '* int))
+
+(define-foreign ttf-close-font
+ void "TTF_CloseFont" '(*))
+
+(define-foreign ttf-font-height
+ int "TTF_FontHeight" '(*))
+
+(define-foreign ttf-render-text-solid
+ '* "TTF_RenderText_Solid" (list '* '* sdl-color))
+
+(define-foreign ttf-render-utf8-solid
+ '* "TTF_RenderUTF8_Solid" (list '* '* sdl-color))
+
+(define-foreign ttf-render-text-shaded
+ '* "TTF_RenderText_Shaded" (list '* '* sdl-color sdl-color))
+
+(define-foreign ttf-render-utf8-shaded
+ '* "TTF_RenderUTF8_Shaded" (list '* '* sdl-color sdl-color))
+
+(define-foreign ttf-render-text-blended
+ '* "TTF_RenderText_Blended" (list '* '* sdl-color))
+
+(define-foreign ttf-render-utf8-blended
+ '* "TTF_RenderUTF8_Blended" (list '* '* sdl-color))
diff --git a/sdl2/ttf.scm b/sdl2/ttf.scm
new file mode 100644
index 0000000..aeb1577
--- /dev/null
+++ b/sdl2/ttf.scm
@@ -0,0 +1,93 @@
+;;; guile-sdl2 --- FFI bindings for SDL2
+;;; Copyright © 2015 David Thompson <davet@gnu.org>
+;;;
+;;; This file is part of guile-sdl2.
+;;;
+;;; Guile-sdl2 is free software; you can redistribute it and/or modify
+;;; it under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation; either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; Guile-sdl2 is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with guile-sdl2. If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; Font rendering.
+;;
+;;; Code:
+
+(define-module (sdl2 ttf)
+ #:use-module (ice-9 format)
+ #:use-module (system foreign)
+ #:use-module (sdl2)
+ #:use-module ((sdl2 bindings ttf) #:prefix ffi:)
+ #:export (ttf-init
+ ttf-quit
+
+ font?
+ load-font
+ delete-font!
+ font-height
+
+ render-font-solid
+ render-font-blended))
+
+(define (ttf-init)
+ "Initialize the TTF system."
+ (unless (zero? (ffi:ttf-init))
+ (sdl-error "ttf-init" "failed to initialize TTF library")))
+
+(define (ttf-quit)
+ "Shut down and clean up the TTF system."
+ (ffi:ttf-quit))
+
+(define-wrapped-pointer-type <font>
+ font?
+ wrap-font unwrap-font
+ (lambda (font port)
+ (format port "#<font ~x>"
+ (pointer-address (unwrap-font font)))))
+
+(define (load-font file point-size)
+ "Load TTF font from FILE and return a new font object whose glyph
+size is POINT-SIZE."
+ (let ((ptr (ffi:ttf-open-font (string->pointer file) point-size)))
+ (if (null-pointer? ptr)
+ (sdl-error "load-font" "failed to load font" file)
+ (wrap-font ptr))))
+
+(define (delete-font! font)
+ "Delete the memory allocated for FONT."
+ (ffi:ttf-close-font (unwrap-font font)))
+
+(define (font-height font)
+ "Return the maximum height of FONT."
+ (ffi:ttf-font-height (unwrap-font font)))
+
+(define (render-font-solid font text color)
+ "Render TEXT, a UTF-8 encoded string, using FONT and COLOR, the
+foreground color, and return a surface containing the results."
+ (let ((ptr (ffi:ttf-render-utf8-solid (unwrap-font font)
+ (string->pointer text)
+ ((@@ (sdl2) color->struct) color))))
+ (if (null-pointer? ptr)
+ (sdl-error "render-font-solid" "failed to render text")
+ ((@@ (sdl2 surface) wrap-surface) ptr))))
+
+(define (render-font-blended font text color)
+ "Render TEXT, a UTF-8 encoded string, using FONT and COLOR, the
+foreground color, and return a high-quality alpha-blended surface
+containing the results."
+ (let ((ptr (ffi:ttf-render-utf8-blended (unwrap-font font)
+ (string->pointer text)
+ ((@@ (sdl2) color->struct) color))))
+ (if (null-pointer? ptr)
+ (sdl-error "render-font-solid" "failed to render text")
+ ((@@ (sdl2 surface) wrap-surface) ptr))))