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Add type db, some nice macro features and a brand new SDL3 example #27

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pkulev merged 14 commits from sdl-example into main 2026-09-18 00:11:05 +02:00
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example/sdl3-triangle.sex
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@@ -8,13 +8,29 @@
;;; triangle is and how far it has spun are passed in as uniforms, so ;;; triangle is and how far it has spun are passed in as uniforms, so
;;; the geometry itself is uploaded once and never touched again. ;;; the geometry itself is uploaded once and never touched again.
;;; ;;;
;;; Build: ;;; Build, macOS:
;;; ./sexc example/sdl3-triangle.sex -o sdl3-triangle -- `pkg-config --cflags --libs sdl3` -framework OpenGL ;;; ./sexc example/sdl3-triangle.sex -o sdl3-triangle -- `pkg-config --cflags --libs sdl3` -framework OpenGL
;;;
;;; Build, Linux:
;;; ./sexc example/sdl3-triangle.sex -o sdl3-triangle -- `pkg-config --cflags --libs sdl3 gl`
;;;
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pkulev commented 2026-09-15 21:15:56 +02:00
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This, plus -framework OpenGL in the build line, is Apple's GL 3.3. On Linux OpenGL/gl3.h is missing and gcc does not know -framework; swapping in SDL3/SDL_opengl.h is not enough either (no glCreateShader). Fine as a macOS example — worth saying so in the header, since CI is Ubuntu.

This, plus `-framework OpenGL` in the build line, is Apple's GL 3.3. On Linux `OpenGL/gl3.h` is missing and gcc does not know `-framework`; swapping in `SDL3/SDL_opengl.h` is not enough either (no `glCreateShader`). Fine as a macOS example — worth saying so in the header, since CI is Ubuntu.
;;; The GL header is the one platform difference, and #+ / #- picks it.
;;; Apple keeps the core-profile entry points in <OpenGL/gl3.h> and
;;; links them through -framework OpenGL, which no pkg-config file
;;; describes; everywhere else the prototypes come from <GL/glext.h>
;;; with GL_GLEXT_PROTOTYPES defined, and -lGL -- `pkg-config --libs
;;; gl' -- resolves them. SDL3/SDL_opengl.h is not the shortcut it
;;; looks like: on Apple it resolves to the 2.1 header, which has no
;;; glGenVertexArrays and so cannot bind the VAO this program needs.
(define GL-SILENCE-DEPRECATION 1) ; OpenGL is deprecated on macOS #+macosx (define GL-SILENCE-DEPRECATION 1) ; OpenGL is deprecated on macOS
(include SDL3/SDL.h) (include SDL3/SDL.h)
(include OpenGL/gl3.h)
#+macosx (include OpenGL/gl3.h)
#-macosx (define GL-GLEXT-PROTOTYPES 1)
#-macosx (include GL/gl.h)
#-macosx (include GL/glext.h)
(define WINDOW-WIDTH 800) (define WINDOW-WIDTH 800)
(define WINDOW-HEIGHT 600) (define WINDOW-HEIGHT 600)