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mutter/common/cogl-material-private.h
Neil Roberts e7e8978029 [cogl] Move the texture filters to be a property of the material layer 
The texture filters are now a property of the material layer rather
than the texture object. Whenever a texture is painted with a material
it sets the filters on all of the GL textures in the Cogl texture. The
filter is cached so that it won't be changed unnecessarily.

The automatic mipmap generation has changed so that the mipmaps are
only generated when the texture is painted instead of every time the
data changes. Changing the texture sets a flag to mark that the
mipmaps are dirty. This works better if the FBO extension is available
because we can use glGenerateMipmap. If the extension is not available
it will temporarily enable automatic mipmap generation and reupload
the first pixel of each slice. This requires tracking the data for the
first pixel.

The COGL_TEXTURE_AUTO_MIPMAP flag has been replaced with
COGL_TEXTURE_NO_AUTO_MIPMAP so that it will default to
auto-mipmapping. The mipmap generation is now effectively free if you
are not using a mipmap filter mode so you would only want to disable
it if you had some special reason to generate your own mipmaps.

ClutterTexture no longer has to store its own copy of the filter
mode. Instead it stores it in the material and the property is
directly set and read from that. This fixes problems with the filters
getting out of sync when a cogl handle is set on the texture
directly. It also avoids the mess of having to rerealize the texture
if the filter quality changes to HIGH because Cogl will take of
generating the mipmaps if needed.
2009-06-04 19:03:40 +01:00

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/*
* 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.
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifndef __COGL_MATERIAL_PRIVATE_H
#define __COGL_MATERIAL_PRIVATE_H
#include "cogl-material.h"
#include "cogl-matrix.h"
#include "cogl-handle.h"
#include <glib.h>
typedef struct _CoglMaterial CoglMaterial;
typedef struct _CoglMaterialLayer CoglMaterialLayer;
/* XXX: I don't think gtk-doc supports having private enums so these aren't
* bundled in with CoglMaterialLayerFlags */
typedef enum _CoglMaterialLayerPrivFlags
{
/* Ref: CoglMaterialLayerFlags
COGL_MATERIAL_LAYER_FLAG_HAS_USER_MATRIX = 1L<<0
*/
COGL_MATERIAL_LAYER_FLAG_DIRTY = 1L<<1,
COGL_MATERIAL_LAYER_FLAG_DEFAULT_COMBINE = 1L<<2
} CoglMaterialLayerPrivFlags;
/* For tracking the state of a layer that's been flushed to OpenGL */
typedef struct _CoglLayerInfo
{
CoglHandle handle;
gulong flags;
GLenum gl_target;
GLuint gl_texture;
gboolean fallback;
gboolean disabled;
gboolean layer0_overridden;
} CoglLayerInfo;
struct _CoglMaterialLayer
{
CoglHandleObject _parent;
guint index; /*!< lowest index is blended first then others
on top */
gulong flags;
CoglHandle texture; /*!< The texture for this layer, or COGL_INVALID_HANDLE
for an empty layer */
CoglMaterialFilter mag_filter;
CoglMaterialFilter min_filter;
/* Determines how the color of individual texture fragments
* are calculated. */
GLint texture_combine_rgb_func;
GLint texture_combine_rgb_src[3];
GLint texture_combine_rgb_op[3];
GLint texture_combine_alpha_func;
GLint texture_combine_alpha_src[3];
GLint texture_combine_alpha_op[3];
GLfloat texture_combine_constant[4];
/* TODO: Support purely GLSL based material layers */
CoglMatrix matrix;
};
typedef enum _CoglMaterialFlags
{
COGL_MATERIAL_FLAG_ENABLE_BLEND = 1L<<0,
COGL_MATERIAL_FLAG_SHOWN_SAMPLER_WARNING = 1L<<1,
COGL_MATERIAL_FLAG_DEFAULT_COLOR = 1L<<2,
COGL_MATERIAL_FLAG_DEFAULT_GL_MATERIAL = 1L<<3,
COGL_MATERIAL_FLAG_DEFAULT_ALPHA_FUNC = 1L<<4,
COGL_MATERIAL_FLAG_DEFAULT_BLEND_FUNC = 1L<<5
} CoglMaterialFlags;
struct _CoglMaterial
{
CoglHandleObject _parent;
gulong flags;
/* If no lighting is enabled; this is the basic material color */
GLfloat unlit[4];
/* Standard OpenGL lighting model attributes */
GLfloat ambient[4];
GLfloat diffuse[4];
GLfloat specular[4];
GLfloat emission[4];
GLfloat shininess;
/* Determines what fragments are discarded based on their alpha */
CoglMaterialAlphaFunc alpha_func;
GLfloat alpha_func_reference;
/* Determines how this material is blended with other primitives */
#ifndef HAVE_COGL_GLES
GLenum blend_equation_rgb;
GLenum blend_equation_alpha;
GLint blend_src_factor_alpha;
GLint blend_dst_factor_alpha;
GLfloat blend_constant[4];
#endif
GLint blend_src_factor_rgb;
GLint blend_dst_factor_rgb;
GList *layers;
};
/*
* SECTION:cogl-material-internals
* @short_description: Functions for creating custom primitives that make use
* of Cogl materials for filling.
*
* Normally you shouldn't need to use this API directly, but if you need to
* developing a custom/specialised primitive - probably using raw OpenGL - then
* this API aims to expose enough of the material internals to support being
* able to fill your geometry according to a given Cogl material.
*/
/*
* cogl_material_get_cogl_enable_flags:
* @material: A CoglMaterial object
*
* This determines what flags need to be passed to cogl_enable before this
* material can be used. Normally you shouldn't need to use this function
* directly since Cogl will do this internally, but if you are developing
* custom primitives directly with OpenGL you may want to use this.
*
* Note: This API is hopfully just a stop-gap solution. Ideally cogl_enable
* will be replaced.
*/
/* TODO: find a nicer solution! */
gulong _cogl_material_get_cogl_enable_flags (CoglHandle handle);
/*
* CoglMaterialLayerFlags:
* @COGL_MATERIAL_LAYER_FLAG_USER_MATRIX: Means the user has supplied a
* custom texture matrix.
*/
typedef enum _CoglMaterialLayerFlags
{
COGL_MATERIAL_LAYER_FLAG_HAS_USER_MATRIX = 1L<<0
} CoglMaterialLayerFlags;
/* XXX: NB: if you add flags here you will need to update
* CoglMaterialLayerPrivFlags!!! */
/*
* cogl_material_layer_get_flags:
* @layer_handle: A CoglMaterialLayer layer handle
*
* This lets you get a number of flag attributes about the layer. Normally
* you shouldn't need to use this function directly since Cogl will do this
* internally, but if you are developing custom primitives directly with
* OpenGL you may need this.
*/
gulong _cogl_material_layer_get_flags (CoglHandle layer_handle);
/*
* CoglMaterialFlushOption:
* @COGL_MATERIAL_FLUSH_FALLBACK_MASK: Follow this by a guin32 mask
* of the layers that can't be supported with the user supplied texture
* and need to be replaced with fallback textures. (1 = fallback, and the
* least significant bit = layer 0)
* @COGL_MATERIAL_FLUSH_DISABLE_MASK: Follow this by a guint32 mask
* of the layers that you want to completly disable texturing for
* (1 = fallback, and the least significant bit = layer 0)
* @COGL_MATERIAL_FLUSH_LAYER0_OVERRIDE: Follow this by a GLuint OpenGL texture
* name to override the texture used for layer 0 of the material. This is
* intended for dealing with sliced textures where you will need to point
* to each of the texture slices in turn when drawing your geometry.
* Passing a value of 0 is the same as not passing the option at all.
*/
typedef enum _CoglMaterialFlushOption
{
COGL_MATERIAL_FLUSH_FALLBACK_MASK = 1,
COGL_MATERIAL_FLUSH_DISABLE_MASK,
COGL_MATERIAL_FLUSH_LAYER0_OVERRIDE,
} CoglMaterialFlushOption;
/*
* cogl_material_flush_gl_state:
* @material: A CoglMaterial object
* @...: A NULL terminated list of (CoglMaterialFlushOption, data) pairs
*
* This function commits the state of the specified CoglMaterial - including
* the texture state for all the layers - to the OpenGL[ES] driver.
*
* Since 1.0
*/
void _cogl_material_flush_gl_state (CoglHandle material,
...) G_GNUC_NULL_TERMINATED;
#endif /* __COGL_MATERIAL_PRIVATE_H */
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