mirror of
https://github.com/brl/mutter.git
synced 2024-11-24 00:50:42 -05:00
61deeafa71
The cogl_shader_get_info_log() function is very inconvenient for language bindings and for regular use, as it requires a static buffer to be filled -- basically just providing a wrapper around glGetInfoLogARB(). Since COGL aims to be a more convenient API than raw GL we should just make cogl_shader_get_info_log() return an allocated string with the GLSL compiler log.
314 lines
9.7 KiB
C
314 lines
9.7 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2008,2009 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
|
|
#error "Only <cogl/cogl.h> can be included directly."
|
|
#endif
|
|
|
|
#ifndef __COGL_SHADER_H__
|
|
#define __COGL_SHADER_H__
|
|
|
|
#include <cogl/cogl-types.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
/**
|
|
* SECTION:cogl-shaders
|
|
* @short_description: Fuctions for accessing the programmable GL pipeline
|
|
*
|
|
* COGL allows accessing the GL programmable pipeline in order to create
|
|
* vertex and fragment shaders.
|
|
*
|
|
* The only supported format is GLSL shaders.
|
|
*/
|
|
|
|
/**
|
|
* CoglShaderType:
|
|
* @COGL_SHADER_TYPE_VERTEX: A program for proccessing vertices
|
|
* @COGL_SHADER_TYPE_FRAGMENT: A program for processing fragments
|
|
*
|
|
* Types of shaders
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
typedef enum {
|
|
COGL_SHADER_TYPE_VERTEX,
|
|
COGL_SHADER_TYPE_FRAGMENT
|
|
} CoglShaderType;
|
|
|
|
/**
|
|
* cogl_create_shader:
|
|
* @shader_type: CGL_VERTEX_SHADER or CGL_FRAGMENT_SHADER.
|
|
*
|
|
* Create a new shader handle, use #cogl_shader_source to set the source code
|
|
* to be used on it.
|
|
*
|
|
* Returns: a new shader handle.
|
|
*/
|
|
CoglHandle cogl_create_shader (CoglShaderType shader_type);
|
|
|
|
/**
|
|
* cogl_shader_ref:
|
|
* @handle: A #CoglHandle to a shader.
|
|
*
|
|
* Add an extra reference to a shader.
|
|
*
|
|
* Returns: @handle
|
|
*/
|
|
CoglHandle cogl_shader_ref (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_shader_unref:
|
|
* @handle: A #CoglHandle to a shader.
|
|
*
|
|
* Removes a reference to a shader. If it was the last reference the
|
|
* shader object will be destroyed.
|
|
*/
|
|
void cogl_shader_unref (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_is_shader:
|
|
* @handle: A CoglHandle
|
|
*
|
|
* Gets whether the given handle references an existing shader object.
|
|
*
|
|
* Returns: %TRUE if the handle references a shader,
|
|
* %FALSE otherwise
|
|
*/
|
|
gboolean cogl_is_shader (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_shader_source:
|
|
* @shader: #CoglHandle for a shader.
|
|
* @source: GLSL shader source.
|
|
*
|
|
* Replaces the current GLSL source associated with a shader with a new
|
|
* one.
|
|
*/
|
|
void cogl_shader_source (CoglHandle shader,
|
|
const gchar *source);
|
|
/**
|
|
* cogl_shader_compile:
|
|
* @handle: #CoglHandle for a shader.
|
|
*
|
|
* Compiles the shader, no return value, but the shader is now ready for
|
|
* linking into a program.
|
|
*/
|
|
void cogl_shader_compile (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_shader_get_info_log:
|
|
* @handle: #CoglHandle for a shader.
|
|
*
|
|
* Retrieves the information log for a coglobject, can be used in conjunction
|
|
* with cogl_shader_get_parameteriv() to retrieve the compiler warnings/error
|
|
* messages that caused a shader to not compile correctly, mainly useful for
|
|
* debugging purposes.
|
|
*
|
|
* Return value: a newly allocated string containing the info log. Use
|
|
* g_free() to free it
|
|
*/
|
|
gchar * cogl_shader_get_info_log (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_shader_get_type:
|
|
* @handle: #CoglHandle for a shader.
|
|
*
|
|
* Retrieves the type of a shader #CoglHandle
|
|
*
|
|
* Return value: %COGL_SHADER_TYPE_VERTEX if the shader is a vertex processor
|
|
* or %COGL_SHADER_TYPE_FRAGMENT if the shader is a frament processor
|
|
*/
|
|
CoglShaderType cogl_shader_get_type (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_shader_is_compiled:
|
|
* @handle: #CoglHandle for a shader.
|
|
*
|
|
* Retrieves whether a shader #CoglHandle has been compiled
|
|
*
|
|
* Return value: %TRUE if the shader object has sucessfully be compiled
|
|
*/
|
|
gboolean cogl_shader_is_compiled (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_create_program:
|
|
*
|
|
* Create a new cogl program object that can be used to replace parts of the GL
|
|
* rendering pipeline with custom code.
|
|
*
|
|
* Returns: a new cogl program.
|
|
*/
|
|
CoglHandle cogl_create_program (void);
|
|
|
|
/**
|
|
* cogl_program_ref:
|
|
* @handle: A #CoglHandle to a program.
|
|
*
|
|
* Add an extra reference to a program.
|
|
*
|
|
* Returns: @handle
|
|
*/
|
|
CoglHandle cogl_program_ref (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_program_unref:
|
|
* @handle: A #CoglHandle to a program.
|
|
*
|
|
* Removes a reference to a program. If it was the last reference the
|
|
* program object will be destroyed.
|
|
*/
|
|
void cogl_program_unref (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_is_program:
|
|
* @handle: A CoglHandle
|
|
*
|
|
* Gets whether the given handle references an existing program object.
|
|
*
|
|
* Returns: %TRUE if the handle references a program,
|
|
* %FALSE otherwise
|
|
*/
|
|
gboolean cogl_is_program (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_program_attach_shader:
|
|
* @program_handle: a #CoglHandle for a shdaer program.
|
|
* @shader_handle: a #CoglHandle for a vertex of fragment shader.
|
|
*
|
|
* Attaches a shader to a program object, a program can have one vertex shader
|
|
* and one fragment shader attached.
|
|
*/
|
|
void cogl_program_attach_shader (CoglHandle program_handle,
|
|
CoglHandle shader_handle);
|
|
|
|
|
|
/**
|
|
* cogl_program_link:
|
|
* @handle: a #CoglHandle for a shader program.
|
|
*
|
|
* Links a program making it ready for use.
|
|
*/
|
|
void cogl_program_link (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_program_use:
|
|
* @handle: a #CoglHandle for a shader program or %COGL_INVALID_HANDLE.
|
|
*
|
|
* Activate a specific shader program replacing that part of the GL
|
|
* rendering pipeline, if passed in %COGL_INVALID_HANDLE the default
|
|
* behavior of GL is reinstated.
|
|
*/
|
|
void cogl_program_use (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_program_get_uniform_location:
|
|
* @handle: a #CoglHandle for a shader program.
|
|
* @uniform_name: the name of a uniform.
|
|
*
|
|
* Retrieve the location (offset) of a uniform variable in a shader program,
|
|
* a uniform is a variable that is constant for all vertices/fragments for a
|
|
* shader object and is possible to modify as an external parameter.
|
|
*
|
|
* Return value: the offset of a uniform in a specified program.
|
|
* This uniform can be set using cogl_program_uniform_1f() when the
|
|
* program is in use.
|
|
*/
|
|
int cogl_program_get_uniform_location
|
|
(CoglHandle handle,
|
|
const char *uniform_name);
|
|
|
|
/**
|
|
* cogl_program_uniform_1f:
|
|
* @uniform_no: the unform to set.
|
|
* @value: the new value of the uniform.
|
|
*
|
|
* Changes the value of a floating point uniform in the currently
|
|
* used (see cogl_program_use()) shader program.
|
|
*/
|
|
void cogl_program_uniform_1f (int uniform_no,
|
|
float value);
|
|
|
|
/**
|
|
* cogl_program_uniform_1i:
|
|
* @uniform_no: the unform to set.
|
|
* @value: the new value of the uniform.
|
|
*
|
|
* Changes the value of an integer uniform in the currently
|
|
* used (see cogl_program_use()) shader program.
|
|
*/
|
|
void cogl_program_uniform_1i (int uniform_no,
|
|
int value);
|
|
|
|
/**
|
|
* cogl_program_uniform_float:
|
|
* @uniform_no: the uniform to set.
|
|
* @size: Size of float vector.
|
|
* @count: Size of array of uniforms.
|
|
* @value: the new value of the uniform.
|
|
*
|
|
* Changes the value of a float vector uniform, or uniform array in the
|
|
* currently used (see #cogl_program_use) shader program.
|
|
*/
|
|
void cogl_program_uniform_float (int uniform_no,
|
|
int size,
|
|
int count,
|
|
const GLfloat *value);
|
|
|
|
/**
|
|
* cogl_program_uniform_int:
|
|
* @uniform_no: the uniform to set.
|
|
* @size: Size of int vector.
|
|
* @count: Size of array of uniforms.
|
|
* @value: the new value of the uniform.
|
|
*
|
|
* Changes the value of a int vector uniform, or uniform array in the
|
|
* currently used (see cogl_program_use()) shader program.
|
|
*/
|
|
void cogl_program_uniform_int (int uniform_no,
|
|
int size,
|
|
int count,
|
|
const int *value);
|
|
|
|
/**
|
|
* cogl_program_uniform_matrix:
|
|
* @uniform_no: the uniform to set.
|
|
* @size: Size of matrix.
|
|
* @count: Size of array of uniforms.
|
|
* @transpose: Whether to transpose the matrix when setting the uniform.
|
|
* @value: the new value of the uniform.
|
|
*
|
|
* Changes the value of a matrix uniform, or uniform array in the
|
|
* currently used (see cogl_program_use()) shader program. The @size
|
|
* parameter is used to determine the square size of the matrix.
|
|
*/
|
|
void cogl_program_uniform_matrix (int uniform_no,
|
|
int size,
|
|
int count,
|
|
gboolean transpose,
|
|
const float *value);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __COGL_SHADER_H__ */
|