mutter/common/cogl-blend-string.h

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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 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.
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifndef COGL_BLEND_STRING_H
#define COGL_BLEND_STRING_H
#include <stdlib.h>
#include <glib.h>
typedef enum _CoglBlendStringContext
{
COGL_BLEND_STRING_CONTEXT_BLENDING,
COGL_BLEND_STRING_CONTEXT_TEXTURE_COMBINE
} CoglBlendStringContext;
#define COGL_BLEND_STRING_ERROR _cogl_blend_string_error_quark ()
typedef enum _CoglBlendStringError
{
COGL_BLEND_STRING_ERROR_PARSE_ERROR,
COGL_BLEND_STRING_ERROR_ARGUMENT_PARSE_ERROR,
COGL_BLEND_STRING_ERROR_INVALID_ERROR,
COGL_BLEND_STRING_ERROR_GPU_UNSUPPORTED_ERROR
} CoglBlendStringError;
/* NB: debug stringify code will get upset if these
* are re-ordered */
typedef enum _CoglBlendStringChannelMask
{
COGL_BLEND_STRING_CHANNEL_MASK_RGB,
COGL_BLEND_STRING_CHANNEL_MASK_ALPHA,
COGL_BLEND_STRING_CHANNEL_MASK_RGBA
} CoglBlendStringChannelMask;
typedef enum _CoglBlendStringColorSourceType
{
/* blending */
COGL_BLEND_STRING_COLOR_SOURCE_SRC_COLOR,
COGL_BLEND_STRING_COLOR_SOURCE_DST_COLOR,
/* shared */
COGL_BLEND_STRING_COLOR_SOURCE_CONSTANT,
/* texture combining */
COGL_BLEND_STRING_COLOR_SOURCE_TEXTURE,
COGL_BLEND_STRING_COLOR_SOURCE_TEXTURE_N,
COGL_BLEND_STRING_COLOR_SOURCE_PRIMARY,
COGL_BLEND_STRING_COLOR_SOURCE_PREVIOUS
} CoglBlendStringColorSourceType;
typedef struct _CoglBlendStringColorSourceInfo
{
CoglBlendStringColorSourceType type;
const char *name;
size_t name_len;
} CoglBlendStringColorSourceInfo;
typedef struct _CoglBlendStringColorSource
{
gboolean is_zero;
const CoglBlendStringColorSourceInfo *info;
int texture; /* for the TEXTURE_N color source */
gboolean one_minus;
CoglBlendStringChannelMask mask;
} CoglBlendStringColorSource;
typedef struct _CoglBlendStringFactor
{
gboolean is_one;
gboolean is_src_alpha_saturate;
gboolean is_color;
CoglBlendStringColorSource source;
} CoglBlendStringFactor;
typedef struct _CoglBlendStringArgument
{
CoglBlendStringColorSource source;
CoglBlendStringFactor factor;
} CoglBlendStringArgument;
typedef enum _CoglBlendStringFunctionType
{
/* shared */
COGL_BLEND_STRING_FUNCTION_AUTO_COMPOSITE,
COGL_BLEND_STRING_FUNCTION_ADD,
/* texture combine only */
COGL_BLEND_STRING_FUNCTION_REPLACE,
COGL_BLEND_STRING_FUNCTION_MODULATE,
COGL_BLEND_STRING_FUNCTION_ADD_SIGNED,
COGL_BLEND_STRING_FUNCTION_INTERPOLATE,
COGL_BLEND_STRING_FUNCTION_SUBTRACT,
COGL_BLEND_STRING_FUNCTION_DOT3_RGB,
COGL_BLEND_STRING_FUNCTION_DOT3_RGBA
} CoglBlendStringFunctionType;
typedef struct _CoglBlendStringFunctionInfo
{
enum _CoglBlendStringFunctionType type;
const char *name;
size_t name_len;
int argc;
} CoglBlendStringFunctionInfo;
typedef struct _CoglBlendStringStatement
{
CoglBlendStringChannelMask mask;
const CoglBlendStringFunctionInfo *function;
CoglBlendStringArgument args[3];
} CoglBlendStringStatement;
gboolean
_cogl_blend_string_compile (const char *string,
CoglBlendStringContext context,
CoglBlendStringStatement *statements,
GError **error);
void
_cogl_blend_string_split_rgba_statement (CoglBlendStringStatement *statement,
CoglBlendStringStatement *rgb,
CoglBlendStringStatement *a);
GQuark
_cogl_blend_string_error_quark (void);
#endif /* COGL_BLEND_STRING_H */