jyapayne/opengl
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dead code elimination

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This commit is contained in:
EXetoC 2014-10-04 13:23:42 +02:00
commit 03e5209195
6 changed files with 1293 additions and 1282 deletions
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30
src/opengl.nim
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@ -9,7 +9,7 @@
#
## This module is a wrapper around `opengl`:idx:. If you define the symbol
## ``useGlew`` this wrapper does not use Nimrod's ``dynlib`` mechanism,
## ``useGlew`` this wrapper does not use Nimrod's ``dynlib`` mechanism,
## but `glew`:idx: instead. However, this shouldn't be necessary anymore; even
## extension loading for the different operating systems is handled here.
##
@ -23,18 +23,18 @@ when defined(linux):
elif defined(windows):
import winlean, os
when defined(windows):
const
when defined(windows):
const
ogldll* = "OpenGL32.dll"
gludll* = "GLU32.dll"
elif defined(macosx):
elif defined(macosx):
#macosx has this notion of a framework, thus the path to the openGL dylib files
#is absolute
const
const
ogldll* = "/System/Library/Frameworks/OpenGL.framework/Versions/Current/Libraries/libGL.dylib"
gludll* = "/System/Library/Frameworks/OpenGL.framework/Versions/Current/Libraries/libGLU.dylib"
else:
const
else:
const
ogldll* = "libGL.so.1"
gludll* = "libGLU.so.1"
@ -46,10 +46,10 @@ when defined(useGlew):
else:
# quite complex ... thanks to extension support for various platforms:
import dynlib
let oglHandle = loadLib(ogldll)
if isNil(oglHandle): quit("could not load: " & ogldll)
when defined(windows):
var wglGetProcAddress = cast[proc (s: cstring): pointer {.stdcall.}](
symAddr(oglHandle, "wglGetProcAddress"))
@ -66,8 +66,8 @@ else:
if not isNil(wglGetProcAddress): result = wglGetProcAddress(procName)
elif defined(linux):
if not isNil(glXGetProcAddress): result = glXGetProcAddress(procName)
if result != nil: return
if not isNil(glXGetProcAddressARB):
if result != nil: return
if not isNil(glXGetProcAddressARB):
result = glXGetProcAddressARB(procName)
if result != nil: return
result = symAddr(h, procname)
@ -76,22 +76,22 @@ else:
if result == nil: raiseInvalidLibrary(procName)
var gluHandle: TLibHandle
proc gluGetProc(procname: cstring): pointer =
if gluHandle == nil:
gluHandle = loadLib(gludll)
if gluHandle == nil: quit("could not load: " & gludll)
result = glGetProc(gluHandle, procname)
# undocumented 'dynlib' feature: the string literal is replaced by
# the imported proc name:
{.pragma: ogl, dynlib: glGetProc(oglHandle, "0").}
{.pragma: oglx, dynlib: glGetProc(oglHandle, "0").}
{.pragma: wgl, dynlib: glGetProc(oglHandle, "0").}
{.pragma: glu, dynlib: gluGetProc("").}
proc nimLoadProcs0() {.importc.}
template loadExtensions*() =
## call this after your rendering context has been setup if you use
## extensions.