gml_GL_Base.h File Reference

Detailed Description

Wrapper for platform dependent creation of OpenGL rendering context, and conversions from gml_TBitmap to OpenGL buffers.

#include "gml/base/gml_Errors.h"
#include "gml/image/gml_Drawable.h"
#include "gml/image/gml_RGBColor.h"
#include "gml/image/gml_Geometry.h"
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glext.h>

Go to the source code of this file.


Defines
#define	GL_GLEXT_PROTOTYPES
#define	GL_TEXTURE_RECTANGLE_EXT GL_TEXTURE_RECTANGLE_NV
#define	GL_TESSCALLBACKPARAMS
#define	GMLGL_CHECK_ERROR
Typedefs
typedef gmlGL_TContext_ *	gmlGL_TContext
Functions
GML_EXTERN_C gml_TError	gmlGL_Initialize ()
	Initialized gml_GL_Base error numbers. Users of gml_GL_Base function need not call this function as it will be called automatically.
GML_EXTERN_C void	gmlGL_ColorRGBAtoGL4usv (gml_TRGBColor color, float alpha, GLushort glColor)
	Converts a gml_TRGBColor color and its transparency value alpha into a GL color encoded on an array of 4 unsigned short glColor (for use with glColor4usv).
GML_EXTERN_C void	gmlGL_ColorRGBAtoGL4fv (gml_TRGBColor color, float alpha, GLfloat glColor)
	Converts a gml_TRGBColor color and its transparency value alpha into a GL color encoded on an array of 4 floats glColor (for use with glColor4fv).
GML_EXTERN_C gml_TBoolean	gmlGL_HasExtension (char *extension)
	Check whether the current OpenGL context supports the argument extension, e.g. "GL_EXT_texture_rectangle".
GML_EXTERN_C gml_TError	gmlGL_GetTextureParamsFromEncoding (gml_TPixelEncoding enc, GLint internal, GLenum format, GLenum *type)
GML_EXTERN_C gml_TError	gmlGL_SaveToBitmap (gml_TBitmap *bm)
	Copy the current OpenGL context draw buffer to the bitmap bm with "glReadPixels". bm must have compatible specifications.
GML_EXTERN_C void	gmlGL_PlatformInitialize ()
	Perform platform-specific setup. This is called automatically by gmlGL_Initialize. In particular, create the sharing context (context 0).
GML_EXTERN_C gml_TError	gmlGL_FindVisual (gml_TDisplay display, gml_TVisual *visual)
	Find a visual appropriate for an OpenGL context.
GML_EXTERN_C gml_TError	gmlGL_CreateContext (gml_TDisplay display, gml_TVisual visual, gml_TDrawable drawable, gmlGL_TContext *context)
	Creates an OpenGL rendering context and attach it to the drawable drawable. Return the context handle in context. If drawable is NULL, the context may still be used for off-screen rendering. Note that all context share data (textures, display lists, etc.).
GML_EXTERN_C void	gmlGL_DeleteContext (gmlGL_TContext context)
	Deletes an OpenGL rendering context. After the call, the sharing context is active.
GML_EXTERN_C gmlGL_TContext	gmlGL_GetCurrentContext ()
	Return the current OpenGL rendering context.
GML_EXTERN_C gml_TError	gmlGL_SetCurrentContext (gmlGL_TContext context)
	Sets context as the current OpenGL rendering context. If context is NULL, the sharing context is used.
GML_EXTERN_C gml_TError	gmlGL_SwapBuffers (gmlGL_TContext context)
	Swaps front and back buffer (double buffering). Note: gmlGL_SwapBuffer performs an implicit glFlush before it returns.
GML_EXTERN_C gml_TError	gmlGL_DrawableChanged (gmlGL_TContext context)
	Update an Open GL rendering context after its drawable changed (resizing, window exposure...).
GML_EXTERN_C gml_TError	gmlGL_SetDrawableRect (gmlGL_TContext context, GLint top, GLint bottom, GLint width, GLint height)
	Restricts OpenGL rendering in the context's drawable to a rectangle specified by its bottomleft corner and size.
Variables
gml_TError	gmlGL_gErrCantChoosePixelFormat
gml_TError	gmlGL_gErrCantCreateContext
gml_TError	gmlGL_gErrCantAttachDrawable
gml_TError	gmlGL_gErrCantSetCurrentContext
gml_TError	gmlGL_gErrCantSwapBuffers
gml_TError	gmlGL_gErrCantUpdateContextDrawable
gml_TError	gmlGL_gErrWrongBMsize
gml_TError	gmlGL_gErrUnsupportedBMencoding
gml_TError	gmlGL_gErrUnknownContext
gml_TError	gmlGL_gUnsupportedExtension

Function Documentation

GML_EXTERN_C gml_TError gmlGL_DrawableChanged ( gmlGL_TContext context )

Update an Open GL rendering context after its drawable changed (resizing, window exposure...).

Todo:: Nothing done here, check if something should

GML_EXTERN_C gml_TError gmlGL_SetDrawableRect	(	gmlGL_TContext	context,
		GLint	top,
		GLint	bottom,
		GLint	width,
		GLint	height
	)

Restricts OpenGL rendering in the context's drawable to a rectangle specified by its bottomleft corner and size.

Todo:: Nothing done here, check if something should

gml_GL_Base.h File Reference

Detailed Description

Defines

Typedefs

Functions

Variables

Function Documentation