9d45e9641c
We were checking the number of texture units against the GL enum that is used in glGetInteger() to query that number. Let's abstract this in a little function. Took the opportunity to dig a bit on the usage of GL limits for the number of texture (image) units and document our use of them. We'll need something finer grained if we want to fully exploit texture image units with a programmable pipeline.
110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __COGL_INTERNAL_H
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#define __COGL_INTERNAL_H
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#include "cogl.h"
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#include "cogl-matrix-stack.h"
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typedef enum
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{
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COGL_FRONT_WINDING_CLOCKWISE,
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COGL_FRONT_WINDING_COUNTER_CLOCKWISE
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} CoglFrontWinding;
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#ifdef HAVE_COGL_GLES2
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typedef enum {
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COGL_BOXED_NONE,
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COGL_BOXED_INT,
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COGL_BOXED_FLOAT,
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COGL_BOXED_MATRIX
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} CoglBoxedType;
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typedef struct _CoglBoxedValue
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{
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CoglBoxedType type;
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int size, count;
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gboolean transpose;
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union {
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gfloat float_value[4];
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gint int_value[4];
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gfloat matrix[16];
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gfloat *float_array;
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gint *int_array;
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gpointer array;
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} v;
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} CoglBoxedValue;
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#endif
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#ifdef COGL_GL_DEBUG
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const gchar *cogl_gl_error_to_string (GLenum error_code);
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#define GE(x...) G_STMT_START { \
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GLenum __err; \
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(x); \
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while ((__err = glGetError ()) != GL_NO_ERROR) \
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{ \
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g_warning ("%s: GL error (%d): %s\n", \
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G_STRLOC, \
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__err, \
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cogl_gl_error_to_string (__err)); \
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} } G_STMT_END
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#else /* !COGL_GL_DEBUG */
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#define GE(x) (x)
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#endif /* COGL_GL_DEBUG */
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#define COGL_ENABLE_BLEND (1<<1)
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#define COGL_ENABLE_ALPHA_TEST (1<<2)
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#define COGL_ENABLE_VERTEX_ARRAY (1<<3)
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#define COGL_ENABLE_COLOR_ARRAY (1<<4)
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#define COGL_ENABLE_BACKFACE_CULLING (1<<5)
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void _cogl_features_init (void);
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gint _cogl_get_format_bpp (CoglPixelFormat format);
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void cogl_enable (gulong flags);
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gulong cogl_get_enable (void);
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typedef struct _CoglTextureUnit
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{
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int index;
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CoglMatrixStack *matrix_stack;
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} CoglTextureUnit;
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CoglTextureUnit *
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_cogl_get_texture_unit (int index_);
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void
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_cogl_destroy_texture_units (void);
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guint
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_cogl_get_max_texture_image_units (void);
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void
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_cogl_flush_face_winding (void);
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#endif /* __COGL_INTERNAL_H */
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