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a5cdfdfd87
There were several functions I believe no one is currently using that were
only implemented in the GL backend (cogl_offscreen_blit_region and
cogl_offscreen_blit) that have simply been removed so we have a chance to
think about design later with a real use case.
There was one nonsense function (cogl_offscreen_new_multisample) that
sounded exciting but in all cases it just returned COGL_INVALID_HANDLE
(though at least for GL it checked for multisampling support first!?)
it has also been removed.
The MASK draw buffer type has been removed. If we want to expose color
masking later then I think it at least would be nicer to have the mask be a
property that can be set on any draw buffer.
The cogl_draw_buffer and cogl_{push,pop}_draw_buffer function prototypes
have been moved up into cogl.h since they are for managing global Cogl state
and not for modifying or creating the actual offscreen buffers.
This also documents the API so for example desiphering the semantics of
cogl_offscreen_new_to_texture() should be a bit easier now.
349 lines
10 KiB
C
349 lines
10 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) 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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#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <cogl/cogl.h> can be included directly."
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#endif
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#ifndef __COGL_TYPES_H__
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#define __COGL_TYPES_H__
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#include <glib-object.h>
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G_BEGIN_DECLS
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/**
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* CoglHandle:
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*
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* Type used for storing references to cogl objects, the CoglHandle is
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* a fully opaque type without any public data members.
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*/
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typedef gpointer CoglHandle;
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/**
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* COGL_INVALID_HANDLE:
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*
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* A COGL handle that is not valid, used for unitialized handles as well as
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* error conditions.
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*/
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#define COGL_INVALID_HANDLE NULL
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#define COGL_TYPE_HANDLE (cogl_handle_get_type ())
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GType cogl_handle_get_type (void) G_GNUC_CONST;
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CoglHandle cogl_handle_ref (CoglHandle handle);
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void cogl_handle_unref (CoglHandle Handle);
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/**
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* CoglFuncPtr:
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*
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* The type used by cogl for function pointers, note that this type
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* is used as a generic catch-all cast for function pointers and the
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* actual arguments and return type may be different.
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*/
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typedef void (* CoglFuncPtr) (void);
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/**
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* CoglFixed:
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*
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* Fixed point number using a (16.16) notation.
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*/
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typedef gint32 CoglFixed;
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#define COGL_TYPE_FIXED (cogl_fixed_get_type ())
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GType cogl_fixed_get_type (void) G_GNUC_CONST;
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/**
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* CoglAngle:
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*
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* Integer representation of an angle such that 1024 corresponds to
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* full circle (i.e., 2 * pi).
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*
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* Since: 1.0
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*/
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typedef gint32 CoglAngle;
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typedef struct _CoglColor CoglColor;
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typedef struct _CoglTextureVertex CoglTextureVertex;
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/* Enum declarations */
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#define COGL_PIXEL_FORMAT_24 2
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#define COGL_PIXEL_FORMAT_32 3
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#define COGL_A_BIT (1 << 4)
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#define COGL_BGR_BIT (1 << 5)
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#define COGL_AFIRST_BIT (1 << 6)
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#define COGL_PREMULT_BIT (1 << 7)
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#define COGL_UNORDERED_MASK 0x0F
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#define COGL_UNPREMULT_MASK 0x7F
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/**
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* CoglPixelFormat:
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* @COGL_PIXEL_FORMAT_ANY: Any format
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* @COGL_PIXEL_FORMAT_A_8: 8 bits alpha mask
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* @COGL_PIXEL_FORMAT_RGB_565: RGB, 16 bits
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* @COGL_PIXEL_FORMAT_RGBA_4444: RGBA, 16 bits
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* @COGL_PIXEL_FORMAT_RGBA_5551: RGBA, 16 bits
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* @COGL_PIXEL_FORMAT_YUV: FIXME
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* @COGL_PIXEL_FORMAT_G_8: FIXME
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* @COGL_PIXEL_FORMAT_RGB_888: RGB, 24 bits
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* @COGL_PIXEL_FORMAT_BGR_888: BGR, 24 bits
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* @COGL_PIXEL_FORMAT_RGBA_8888: RGBA, 32 bits
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* @COGL_PIXEL_FORMAT_BGRA_8888: BGRA, 32 bits
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* @COGL_PIXEL_FORMAT_ARGB_8888: ARGB, 32 bits
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* @COGL_PIXEL_FORMAT_ABGR_8888: ABGR, 32 bits
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* @COGL_PIXEL_FORMAT_RGBA_8888_PRE: Premultiplied RGBA, 32 bits
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* @COGL_PIXEL_FORMAT_BGRA_8888_PRE: Premultiplied BGRA, 32 bits
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* @COGL_PIXEL_FORMAT_ARGB_8888_PRE: Premultiplied ARGB, 32 bits
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* @COGL_PIXEL_FORMAT_ABGR_8888_PRE: Premultiplied ABGR, 32 bits
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* @COGL_PIXEL_FORMAT_RGBA_4444_PRE: Premultiplied RGBA, 16 bits
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* @COGL_PIXEL_FORMAT_RGBA_5551_PRE: Premultiplied RGBA, 16 bits
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*
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* Pixel formats used by COGL.
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*
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* Since: 0.8
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*/
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typedef enum
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{
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COGL_PIXEL_FORMAT_ANY = 0,
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COGL_PIXEL_FORMAT_A_8 = 1 | COGL_A_BIT,
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COGL_PIXEL_FORMAT_RGB_565 = 4,
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COGL_PIXEL_FORMAT_RGBA_4444 = 5 | COGL_A_BIT,
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COGL_PIXEL_FORMAT_RGBA_5551 = 6 | COGL_A_BIT,
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COGL_PIXEL_FORMAT_YUV = 7,
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COGL_PIXEL_FORMAT_G_8 = 8,
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COGL_PIXEL_FORMAT_RGB_888 = COGL_PIXEL_FORMAT_24,
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COGL_PIXEL_FORMAT_BGR_888 = (COGL_PIXEL_FORMAT_24 |
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COGL_BGR_BIT),
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COGL_PIXEL_FORMAT_RGBA_8888 = COGL_PIXEL_FORMAT_32 |
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COGL_A_BIT,
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COGL_PIXEL_FORMAT_BGRA_8888 = (COGL_PIXEL_FORMAT_32 |
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COGL_A_BIT |
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COGL_BGR_BIT),
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COGL_PIXEL_FORMAT_ARGB_8888 = (COGL_PIXEL_FORMAT_32 |
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COGL_A_BIT |
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COGL_AFIRST_BIT),
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COGL_PIXEL_FORMAT_ABGR_8888 = (COGL_PIXEL_FORMAT_32 |
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COGL_A_BIT |
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COGL_BGR_BIT |
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COGL_AFIRST_BIT),
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COGL_PIXEL_FORMAT_RGBA_8888_PRE = (COGL_PIXEL_FORMAT_32 |
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COGL_A_BIT |
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COGL_PREMULT_BIT),
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COGL_PIXEL_FORMAT_BGRA_8888_PRE = (COGL_PIXEL_FORMAT_32 |
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COGL_A_BIT |
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COGL_PREMULT_BIT |
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COGL_BGR_BIT),
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COGL_PIXEL_FORMAT_ARGB_8888_PRE = (COGL_PIXEL_FORMAT_32 |
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COGL_A_BIT |
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COGL_PREMULT_BIT |
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COGL_AFIRST_BIT),
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COGL_PIXEL_FORMAT_ABGR_8888_PRE = (COGL_PIXEL_FORMAT_32 |
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COGL_A_BIT |
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COGL_PREMULT_BIT |
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COGL_BGR_BIT |
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COGL_AFIRST_BIT),
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COGL_PIXEL_FORMAT_RGBA_4444_PRE = (COGL_PIXEL_FORMAT_RGBA_4444 |
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COGL_A_BIT |
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COGL_PREMULT_BIT),
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COGL_PIXEL_FORMAT_RGBA_5551_PRE = (COGL_PIXEL_FORMAT_RGBA_5551 |
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COGL_A_BIT |
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COGL_PREMULT_BIT),
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} CoglPixelFormat;
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#define COGL_TYPE_PIXEL_FORMAT (cogl_pixel_format_get_type ())
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GType cogl_pixel_format_get_type (void) G_GNUC_CONST;
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/**
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* CoglFeatureFlags:
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* @COGL_FEATURE_TEXTURE_RECTANGLE: ARB_texture_rectangle support
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* @COGL_FEATURE_TEXTURE_NPOT: ARB_texture_non_power_of_two support
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* @COGL_FEATURE_TEXTURE_YUV: ycbcr conversion support
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* @COGL_FEATURE_TEXTURE_READ_PIXELS: glReadPixels() support
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* @COGL_FEATURE_SHADERS_GLSL: GLSL support
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* @COGL_FEATURE_OFFSCREEN: FBO support
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* @COGL_FEATURE_OFFSCREEN_MULTISAMPLE: Multisample support on FBOs
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* @COGL_FEATURE_OFFSCREEN_BLIT: Blit support on FBOs
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* @COGL_FEATURE_FOUR_CLIP_PLANES: At least 4 clip planes available
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* @COGL_FEATURE_STENCIL_BUFFER: Stencil buffer support
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* @COGL_FEATURE_VBOS: VBO support
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*
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* Flags for the supported features.
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*
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* Since: 0.8
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*/
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typedef enum
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{
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COGL_FEATURE_TEXTURE_RECTANGLE = (1 << 1),
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COGL_FEATURE_TEXTURE_NPOT = (1 << 2),
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COGL_FEATURE_TEXTURE_YUV = (1 << 3),
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COGL_FEATURE_TEXTURE_READ_PIXELS = (1 << 4),
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COGL_FEATURE_SHADERS_GLSL = (1 << 5),
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COGL_FEATURE_OFFSCREEN = (1 << 6),
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COGL_FEATURE_OFFSCREEN_MULTISAMPLE = (1 << 7),
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COGL_FEATURE_OFFSCREEN_BLIT = (1 << 8),
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COGL_FEATURE_FOUR_CLIP_PLANES = (1 << 9),
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COGL_FEATURE_STENCIL_BUFFER = (1 << 10),
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COGL_FEATURE_VBOS = (1 << 11)
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} CoglFeatureFlags;
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#define COGL_TYPE_FEATURE_FLAGS (cogl_feature_flags_get_type ())
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GType cogl_feature_flags_get_type (void) G_GNUC_CONST;
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/**
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* CoglBufferTarget:
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* @COGL_WINDOW_BUFFER: FIXME
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* @COGL_OFFSCREEN_BUFFER: FIXME
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*
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* Target flags for FBOs.
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*
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* Since: 0.8
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*/
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typedef enum
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{
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COGL_WINDOW_BUFFER = (1 << 1),
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COGL_OFFSCREEN_BUFFER = (1 << 2)
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} CoglBufferTarget;
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#define COGL_TYPE_BUFFER_TARGET (cogl_buffer_target_get_type ())
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GType cogl_buffer_target_get_type (void) G_GNUC_CONST;
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/**
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* CoglColor:
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*
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* A structure for holding a color definition. The contents of
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* the CoglColor structure are private and should never by accessed
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* directly.
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*
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* Since: 1.0
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*/
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struct _CoglColor
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{
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/*< private >*/
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guint8 red;
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guint8 green;
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guint8 blue;
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guint8 alpha;
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/* padding in case we want to change to floats at
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* some point */
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guint32 padding0;
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guint32 padding1;
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guint32 padding2;
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};
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/**
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* CoglTextureVertex:
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* @x: Model x-coordinate
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* @y: Model y-coordinate
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* @z: Model z-coordinate
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* @tx: Texture x-coordinate
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* @ty: Texture y-coordinate
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* @color: The color to use at this vertex. This is ignored if
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* @use_color is %FALSE when calling cogl_texture_polygon().
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*
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* Used to specify vertex information when calling cogl_texture_polygon().
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*/
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struct _CoglTextureVertex
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{
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float x, y, z;
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float tx, ty;
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CoglColor color;
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};
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/**
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* CoglTextureFlags:
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* @COGL_TEXTURE_NONE: No flags specified
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* @COGL_TEXTURE_AUTO_MIPMAP: Enables the automatic generation of the
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* mipmap pyramid from the base level image whenever it is updated
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*
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* Flags to pass to the cogl_texture_new_* family of functions.
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*
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* Since: 1.0
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*/
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typedef enum {
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COGL_TEXTURE_NONE = 0,
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COGL_TEXTURE_AUTO_MIPMAP = 1 << 0
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} CoglTextureFlags;
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#define COGL_TYPE_TEXTURE_FLAGS (cogl_texture_flags_get_type ())
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GType cogl_texture_flags_get_type (void) G_GNUC_CONST;
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/**
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* CoglFogMode:
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* @COGL_FOG_MODE_LINEAR: Calculates the fog blend factor as:
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* |[
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* f = end - eye_distance / end - start
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* ]|
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* @COGL_FOG_MODE_EXPONENTIAL: Calculates the fog blend factor as:
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* |[
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* f = e ^ -(density * eye_distance)
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* ]|
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* @COGL_FOG_MODE_EXPONENTIAL_SQUARED: Calculates the fog blend factor as:
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* |[
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* f = e ^ -(density * eye_distance)^2
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* ]|
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*
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* The fog mode determines the equation used to calculate the fogging blend
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* factor while fogging is enabled. The simplest %COGL_FOG_MODE_LINEAR mode
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* determines f as:
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*
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* |[
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* f = end - eye_distance / end - start
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* ]|
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*
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* Where eye_distance is the distance of the current fragment in eye
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* coordinates from the origin.
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*
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* Since: 1.0
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*/
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typedef enum _CoglFogMode
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{
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COGL_FOG_MODE_LINEAR,
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COGL_FOG_MODE_EXPONENTIAL,
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COGL_FOG_MODE_EXPONENTIAL_SQUARED
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} CoglFogMode;
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#define COGL_TYPE_FOG_MODE (cogl_fog_mode_get_type ())
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GType cogl_fog_mode_get_type (void) G_GNUC_CONST;
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G_END_DECLS
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#endif /* __COGL_TYPES_H__ */
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