janwas
1c1200a049
- add translators from errno and GetLastError to LibError - clarified return values of callbacks (they must return INFO_CB_CONTINUE to continue) - this exposed a few bugs in error handling chains (returning incorrect values); also reduced say-nothing instances of return -1. - move CHECK_ERR etc. macros to lib_error This was SVN commit r3229.
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
#ifndef OGL_SHADER_H__
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#define OGL_SHADER_H__
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#include "../handle.h"
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#include "lib/types.h"
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#include "lib/ogl.h"
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/*
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Encapsulate shader objects into handles, which transparently enables sharing
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of shader source files between programs as well as reloading shaders at
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runtime.
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NOTE: Only use functions form this module after verifying that the required
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extensions are available, or all bets are off.
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*/
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// Create, load and compile a shader object of the given type
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// (e.g. GL_VERTEX_SHADER_ARB). The given file will be used as
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// source code for the shader.
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Handle ogl_shader_load(const char* fn, GLenum type);
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// Free all resources associated with the given handle (subject
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// to refcounting).
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void ogl_shader_free(Handle& h);
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// Attach a shader to the given OpenGL program.
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// Returns 0 on success and a negative error code otherwise.
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LibError ogl_shader_attach(GLhandleARB program, Handle& h);
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/*
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Encapsulate program objects into handles.
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*/
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// Load a program object based on the given XML file description.
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// Shader objects are loaded and attached automatically.
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Handle ogl_program_load(const char* fn);
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// Free all resources associated with the given program handle.
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void ogl_program_free(Handle& h);
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// Activate the program (glUseProgramObjectARB).
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// h may be 0, in which case program objects are disabled.
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LibError ogl_program_use(Handle h);
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// Query uniform information
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GLint ogl_program_get_uniform_location(Handle h, const char* name);
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// Query vertex attribute information
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GLint ogl_program_get_attrib_location(Handle h, const char* name);
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#endif // OGL_SHADER_H__
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