mutter/cogl/driver/gl/cogl-program.c
Damien Lespiau 58b0028b52 analysis: FALSE/0 used in pointer context
While this is totally fine (0 in the pointer context will be converted
in the right internal NULL representation, which could be a value with
some bits to 1), I believe it's clearer to use NULL in the pointer
context.

It seems that, in most case, it's more an overlook than a deliberate
choice to use FALSE/0 as NULL, eg. copying a _COGL_GET_CONTEXT (ctx, 0)
or a g_return_val_if_fail (cond, 0) from a function returning a
gboolean.
2010-06-01 12:08:18 +01:00

256 lines
7.0 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, see <http://www.gnu.org/licenses/>.
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl.h"
#include "cogl-program.h"
#include "cogl-shader-private.h"
#include "cogl-internal.h"
#include "cogl-handle.h"
#include "cogl-context.h"
#include "cogl-journal-private.h"
#include <glib.h>
#define glCreateProgramObject ctx->drv.pf_glCreateProgramObject
#define glAttachObject ctx->drv.pf_glAttachObject
#define glUseProgramObject ctx->drv.pf_glUseProgramObject
#define glLinkProgram ctx->drv.pf_glLinkProgram
#define glGetUniformLocation ctx->drv.pf_glGetUniformLocation
#define glUniform1f ctx->drv.pf_glUniform1f
#define glUniform2f ctx->drv.pf_glUniform2f
#define glUniform3f ctx->drv.pf_glUniform3f
#define glUniform4f ctx->drv.pf_glUniform4f
#define glUniform1fv ctx->drv.pf_glUniform1fv
#define glUniform2fv ctx->drv.pf_glUniform2fv
#define glUniform3fv ctx->drv.pf_glUniform3fv
#define glUniform4fv ctx->drv.pf_glUniform4fv
#define glUniform1i ctx->drv.pf_glUniform1i
#define glUniform2i ctx->drv.pf_glUniform2i
#define glUniform3i ctx->drv.pf_glUniform3i
#define glUniform4i ctx->drv.pf_glUniform4i
#define glUniform1iv ctx->drv.pf_glUniform1iv
#define glUniform2iv ctx->drv.pf_glUniform2iv
#define glUniform3iv ctx->drv.pf_glUniform3iv
#define glUniform4iv ctx->drv.pf_glUniform4iv
#define glUniformMatrix2fv ctx->drv.pf_glUniformMatrix2fv
#define glUniformMatrix3fv ctx->drv.pf_glUniformMatrix3fv
#define glUniformMatrix4fv ctx->drv.pf_glUniformMatrix4fv
#define glDeleteObject ctx->drv.pf_glDeleteObject
static void _cogl_program_free (CoglProgram *program);
COGL_HANDLE_DEFINE (Program, program);
static void
_cogl_program_free (CoglProgram *program)
{
/* Frees program resources but its handle is not
released! Do that separately before this! */
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
glDeleteObject (program->gl_handle);
}
CoglHandle
cogl_create_program (void)
{
CoglProgram *program;
_COGL_GET_CONTEXT (ctx, NULL);
program = g_slice_new (CoglProgram);
program->gl_handle = glCreateProgramObject ();
return _cogl_program_handle_new (program);
}
void
cogl_program_attach_shader (CoglHandle program_handle,
CoglHandle shader_handle)
{
CoglProgram *program;
CoglShader *shader;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_program (program_handle) || !cogl_is_shader (shader_handle))
return;
program = _cogl_program_pointer_from_handle (program_handle);
shader = _cogl_shader_pointer_from_handle (shader_handle);
glAttachObject (program->gl_handle, shader->gl_handle);
}
void
cogl_program_link (CoglHandle handle)
{
CoglProgram *program;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (!cogl_is_program (handle))
return;
program = _cogl_program_pointer_from_handle (handle);
glLinkProgram (program->gl_handle);
}
void
cogl_program_use (CoglHandle handle)
{
CoglProgram *program;
GLhandleARB gl_handle;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (handle != COGL_INVALID_HANDLE && !cogl_is_program (handle))
return;
/* The Cogl journal doesn't currently cope with the use of
* shaders so we have to flush all priitives whenever the
* current shader changes... */
_cogl_journal_flush ();
if (handle == COGL_INVALID_HANDLE)
gl_handle = 0;
else
{
program = _cogl_program_pointer_from_handle (handle);
gl_handle = program->gl_handle;
}
glUseProgramObject (gl_handle);
}
int
cogl_program_get_uniform_location (CoglHandle handle,
const char *uniform_name)
{
CoglProgram *program;
_COGL_GET_CONTEXT (ctx, 0);
if (!cogl_is_program (handle))
return 0;
program = _cogl_program_pointer_from_handle (handle);
return glGetUniformLocation (program->gl_handle, uniform_name);
}
void
cogl_program_uniform_1f (int uniform_no,
float value)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
glUniform1f (uniform_no, value);
}
void
cogl_program_uniform_1i (int uniform_no,
int value)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
glUniform1i (uniform_no, value);
}
void
cogl_program_uniform_float (int uniform_no,
int size,
int count,
const GLfloat *value)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
switch (size)
{
case 1:
glUniform1fv (uniform_no, count, value);
break;
case 2:
glUniform2fv (uniform_no, count, value);
break;
case 3:
glUniform3fv (uniform_no, count, value);
break;
case 4:
glUniform4fv (uniform_no, count, value);
break;
default:
g_warning ("%s called with invalid size parameter", G_STRFUNC);
}
}
void
cogl_program_uniform_int (int uniform_no,
int size,
int count,
const int *value)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
switch (size)
{
case 1:
glUniform1iv (uniform_no, count, value);
break;
case 2:
glUniform2iv (uniform_no, count, value);
break;
case 3:
glUniform3iv (uniform_no, count, value);
break;
case 4:
glUniform4iv (uniform_no, count, value);
break;
default:
g_warning ("%s called with invalid size parameter", G_STRFUNC);
}
}
void
cogl_program_uniform_matrix (int uniform_no,
int size,
int count,
gboolean transpose,
const GLfloat *value)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
switch (size)
{
case 2 :
glUniformMatrix2fv (uniform_no, count, transpose, value);
break;
case 3 :
glUniformMatrix3fv (uniform_no, count, transpose, value);
break;
case 4 :
glUniformMatrix4fv (uniform_no, count, transpose, value);
break;
default :
g_warning ("%s called with invalid size parameter", G_STRFUNC);
}
}