I am working on integrating OpenGL in a Nim project while I am still learning
Nim. As I am still waiting on the arrival of the book, I hope I am not asking
something that is addressed in the manual but I haven't found yet (although I
DO hope there is a solution of course).
But at this moment, it looks like a serious issue between the identifier
equality and FFI.
glTexImage2D(GL_TEXTURE_2D.GLenum, 0.GLint, GL_RGBA32F.GLint, 512.GLsizei,
512.GLsizei, 0.GLint, GL_RGBA.GLenum, GL_FLOAT.GLenum, buf[0].addr)
Run
(You can replace the buf[0].addr with nil if you like, result is the same)
I can't get this to compile because of the GL_FLOAT constant. In OpenGL, there
is a GLfloat type and a GL_FLOAT constant and I think it is due to identifier
equality in Nim that it is interpreted wrong.
If I omit the .GLenum cast on GL_FLOAT, the error message is:
Error: type mismatch
Expression: glTexImage2D(GLenum(3553'u), GLint(0), GLint(34836'u),
GLsizei(512),
GLsizei(512), GLint(0), GLenum(6408'u), GLfloat, addr(buf[0]))
[1] GLenum(3553'u): GLenum
[2] GLint(0): GLint
[3] GLint(34836'u): GLint
[4] GLsizei(512): GLsizei
[5] GLsizei(512): GLsizei
[6] GLint(0): GLint
[7] GLenum(6408'u): GLenum
[8] GLfloat: typedesc[GLfloat]
[9] addr(buf[0]): ptr float32
Expected one of (first mismatch at [position]):
[8] proc glTexImage2D(target: GLenum; level: GLint; internalformat: GLint;
width: GLsizei; height: GLsizei; border: GLint;
format: GLenum; type: GLenum; pixels: pointer)
Run
If I add the .GLenum cast:
Error: type mismatch: got 'typedesc[GLfloat]' for 'GLfloat' but expected
'GLenum = distinct uint32'
Run
Both error messages indicate (to me... that's how I interpret it) that Nim
thinks I am talking about the GLfloat type, not the GL_FLOAT constant.
Can this be solved? And how?
