6436cd073d
This declares the interface types CoglFramebuffer, CoglBuffer, CoglTexture, CoglMetaTexture and CoglPrimitiveTexture as void when including the public cogl.h header so that users don't have to use lots of C type casts between instance types and interface types. This also removes all of the COGL_XYZ() type cast macros since they do nothing more than compile time type casting but it's less readable if you haven't seen that coding pattern before. Unlike with gobject based apis that use per-type macros for casting and performing runtime type checking we instead prefer to do our runtime type checking internally within the front-end public apis when objects are passed into Cogl. This greatly reduces the verbosity for users of the api and may help reduce the chance of excessive runtime type checking that can sometimes be a problem. (cherry picked from commit 248a76f5eac7e5ae4fb45208577f9a55360812a7) Since we can't break the 1.x api this version of the patch actually defines compatible NOP macros within deprecated/cogl-type-casts.h
616 lines
20 KiB
C
616 lines
20 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) 2007,2008,2009,2010 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, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#if !defined(__COGL_H_INSIDE__) && !defined(COGL_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_TEXTURE_H__
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#define __COGL_TEXTURE_H__
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/* We forward declare the CoglTexture type here to avoid some circular
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* dependency issues with the following headers.
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*/
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#ifdef __COGL_H_INSIDE__
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/* For the public C api we typedef interface types as void to avoid needing
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* lots of casting in code and instead we will rely on runtime type checking
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* for these objects. */
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typedef void CoglTexture;
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#else
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typedef struct _CoglTexture CoglTexture;
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#define COGL_TEXTURE(X) ((CoglTexture *)X)
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#endif
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#include <cogl/cogl-types.h>
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#include <cogl/cogl-macros.h>
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#include <cogl/cogl-defines.h>
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#if defined (COGL_ENABLE_EXPERIMENTAL_API)
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#include <cogl/cogl-pixel-buffer.h>
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#endif
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#include <cogl/cogl-bitmap.h>
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COGL_BEGIN_DECLS
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/**
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* SECTION:cogl-texture
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* @short_description: Functions for creating and manipulating textures
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*
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* Cogl allows creating and manipulating textures using a uniform
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* API that tries to hide all the various complexities of creating,
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* loading and manipulating textures.
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*/
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#define COGL_TEXTURE_MAX_WASTE 127
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/**
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* COGL_TEXTURE_ERROR:
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*
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* #CoglError domain for texture errors.
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*
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* Since: 2.0
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* Stability: Unstable
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*/
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#define COGL_TEXTURE_ERROR (cogl_texture_error_quark ())
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/**
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* CoglTextureError:
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* @COGL_TEXTURE_ERROR_SIZE: Unsupported size
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*
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* Error codes that can be thrown when allocating textures.
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*
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* Since: 2.0
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* Stability: Unstable
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*/
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typedef enum {
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COGL_TEXTURE_ERROR_SIZE,
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COGL_TEXTURE_ERROR_FORMAT,
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COGL_TEXTURE_ERROR_BAD_PARAMETER,
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COGL_TEXTURE_ERROR_TYPE
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} CoglTextureError;
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/**
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* CoglTextureType:
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* @COGL_TEXTURE_TYPE_2D: A #CoglTexture2D
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* @COGL_TEXTURE_TYPE_3D: A #CoglTexture3D
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* @COGL_TEXTURE_TYPE_RECTANGLE: A #CoglTextureRectangle
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*
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* Constants representing the underlying hardware texture type of a
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* #CoglTexture.
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*
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* Stability: unstable
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* Since: 1.10
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*/
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typedef enum {
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COGL_TEXTURE_TYPE_2D,
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COGL_TEXTURE_TYPE_3D,
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COGL_TEXTURE_TYPE_RECTANGLE
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} CoglTextureType;
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uint32_t cogl_texture_error_quark (void);
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/**
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* cogl_texture_new_with_size:
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* @width: width of texture in pixels.
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* @height: height of texture in pixels.
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* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
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* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
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* texture.
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*
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* Creates a new #CoglTexture with the specified dimensions and pixel format.
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*
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* Return value: (transfer full): A newly created #CoglTexture or %NULL on failure
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*
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* Since: 0.8
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*/
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CoglTexture *
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cogl_texture_new_with_size (unsigned int width,
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unsigned int height,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format);
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/**
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* cogl_texture_new_from_file:
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* @filename: the file to load
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* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
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* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
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* texture. If %COGL_PIXEL_FORMAT_ANY is given then a premultiplied
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* format similar to the format of the source data will be used. The
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* default blending equations of Cogl expect premultiplied color data;
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* the main use of passing a non-premultiplied format here is if you
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* have non-premultiplied source data and are going to adjust the blend
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* mode (see cogl_material_set_blend()) or use the data for something
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* other than straight blending.
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* @error: return location for a #CoglError or %NULL
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*
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* Creates a #CoglTexture from an image file.
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*
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* Return value: (transfer full): A newly created #CoglTexture or
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* %NULL on failure
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*
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* Since: 0.8
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*/
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CoglTexture *
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cogl_texture_new_from_file (const char *filename,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format,
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CoglError **error);
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/**
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* cogl_texture_new_from_data:
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* @width: width of texture in pixels
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* @height: height of texture in pixels
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* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
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* @format: the #CoglPixelFormat the buffer is stored in in RAM
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* @internal_format: the #CoglPixelFormat that will be used for storing
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* the buffer on the GPU. If COGL_PIXEL_FORMAT_ANY is given then a
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* premultiplied format similar to the format of the source data will
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* be used. The default blending equations of Cogl expect premultiplied
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* color data; the main use of passing a non-premultiplied format here
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* is if you have non-premultiplied source data and are going to adjust
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* the blend mode (see cogl_material_set_blend()) or use the data for
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* something other than straight blending.
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* @rowstride: the memory offset in bytes between the starts of
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* scanlines in @data
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* @data: pointer the memory region where the source buffer resides
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*
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* Creates a new #CoglTexture based on data residing in memory.
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*
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* Return value: (transfer full): A newly created #CoglTexture or
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* %NULL on failure
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*
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* Since: 0.8
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*/
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CoglTexture *
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cogl_texture_new_from_data (int width,
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int height,
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CoglTextureFlags flags,
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CoglPixelFormat format,
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CoglPixelFormat internal_format,
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int rowstride,
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const uint8_t *data);
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/**
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* cogl_texture_new_from_foreign:
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* @gl_handle: opengl handle of foreign texture.
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* @gl_target: opengl target type of foreign texture
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* @width: width of foreign texture
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* @height: height of foreign texture.
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* @x_pot_waste: horizontal waste on the right hand edge of the texture.
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* @y_pot_waste: vertical waste on the bottom edge of the texture.
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* @format: format of the foreign texture.
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*
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* Creates a #CoglTexture based on an existing OpenGL texture; the
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* width, height and format are passed along since it is not always
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* possible to query these from OpenGL.
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*
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* The waste arguments allow you to create a Cogl texture that maps to
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* a region smaller than the real OpenGL texture. For instance if your
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* hardware only supports power-of-two textures you may load a
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* non-power-of-two image into a larger power-of-two texture and use
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* the waste arguments to tell Cogl which region should be mapped to
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* the texture coordinate range [0:1].
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*
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* Return value: (transfer full): A newly created #CoglTexture or
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* %NULL on failure
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*
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* Since: 0.8
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*/
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CoglTexture *
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cogl_texture_new_from_foreign (unsigned int gl_handle,
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unsigned int gl_target,
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unsigned int width,
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unsigned int height,
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unsigned int x_pot_waste,
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unsigned int y_pot_waste,
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CoglPixelFormat format);
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/**
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* cogl_texture_new_from_bitmap:
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* @bitmap: A #CoglBitmap pointer
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* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
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* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
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* texture
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*
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* Creates a #CoglTexture from a #CoglBitmap.
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*
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* Return value: (transfer full): A newly created #CoglTexture or
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* %NULL on failure
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*
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* Since: 1.0
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*/
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CoglTexture *
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cogl_texture_new_from_bitmap (CoglBitmap *bitmap,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format);
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/**
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* cogl_is_texture:
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* @object: A #CoglObject pointer
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*
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* Gets whether the given object references a texture object.
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*
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* Return value: %TRUE if the @object references a texture, and
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* %FALSE otherwise
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*/
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CoglBool
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cogl_is_texture (void *object);
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/**
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* cogl_texture_get_width:
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* @texture: a #CoglTexture pointer.
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*
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* Queries the width of a cogl texture.
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*
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* Return value: the width of the GPU side texture in pixels
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*/
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unsigned int
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cogl_texture_get_width (CoglTexture *texture);
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/**
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* cogl_texture_get_height:
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* @texture: a #CoglTexture pointer.
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*
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* Queries the height of a cogl texture.
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*
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* Return value: the height of the GPU side texture in pixels
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*/
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unsigned int
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cogl_texture_get_height (CoglTexture *texture);
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/**
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* cogl_texture_get_format:
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* @texture: a #CoglTexture pointer.
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*
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* Queries the #CoglPixelFormat of a cogl texture.
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*
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* Return value: the #CoglPixelFormat of the GPU side texture
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*/
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CoglPixelFormat
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cogl_texture_get_format (CoglTexture *texture);
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/**
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* cogl_texture_get_rowstride:
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* @texture a #CoglTexture pointer.
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*
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* Determines the bytes-per-pixel for the #CoglPixelFormat retrieved
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* from cogl_texture_get_format() and multiplies that by the texture's
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* width.
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*
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* <note>It's very unlikely that anyone would need to use this API to
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* query the internal rowstride of a #CoglTexture which can just be
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* considered an implementation detail. Actually it's not even useful
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* internally since underlying drivers are free to use a different
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* format</note>
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*
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* <note>This API is only here for backwards compatibility and
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* shouldn't be used in new code. In particular please don't be
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* mislead to pass the returned value to cogl_texture_get_data() for
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* the rowstride, since you should be passing the rowstride you desire
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* for your destination buffer not the rowstride of the source
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* texture.</note>
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*
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* Return value: The bytes-per-pixel for the current format
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* multiplied by the texture's width
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*
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* Deprecated: 1.10: There's no replacement for the API but there's
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* also no known need for API either. It was just
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* a mistake that it was ever published.
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*/
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COGL_DEPRECATED_IN_1_10
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unsigned int
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cogl_texture_get_rowstride (CoglTexture *texture);
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/**
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* cogl_texture_get_max_waste:
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* @texture: a #CoglTexture pointer.
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*
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* Queries the maximum wasted (unused) pixels in one dimension of a GPU side
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* texture.
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*
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* Return value: the maximum waste
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*/
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int
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cogl_texture_get_max_waste (CoglTexture *texture);
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/**
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* cogl_texture_is_sliced:
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* @texture: a #CoglTexture pointer.
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*
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* Queries if a texture is sliced (stored as multiple GPU side tecture
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* objects).
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*
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* Return value: %TRUE if the texture is sliced, %FALSE if the texture
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* is stored as a single GPU texture
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*/
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CoglBool
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cogl_texture_is_sliced (CoglTexture *texture);
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/**
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* cogl_texture_get_gl_texture:
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* @texture: a #CoglTexture pointer.
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* @out_gl_handle: (out) (allow-none): pointer to return location for the
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* textures GL handle, or %NULL.
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* @out_gl_target: (out) (allow-none): pointer to return location for the
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* GL target type, or %NULL.
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*
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* Queries the GL handles for a GPU side texture through its #CoglTexture.
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*
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* If the texture is spliced the data for the first sub texture will be
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* queried.
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*
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* Return value: %TRUE if the handle was successfully retrieved, %FALSE
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* if the handle was invalid
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*/
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CoglBool
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cogl_texture_get_gl_texture (CoglTexture *texture,
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unsigned int *out_gl_handle,
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unsigned int *out_gl_target);
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/**
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* cogl_texture_get_data:
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* @texture: a #CoglTexture pointer.
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* @format: the #CoglPixelFormat to store the texture as.
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* @rowstride: the rowstride of @data in bytes or pass 0 to calculate
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* from the bytes-per-pixel of @format multiplied by the
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* @texture width.
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* @data: memory location to write the @texture's contents, or %NULL
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* to only query the data size through the return value.
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*
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* Copies the pixel data from a cogl texture to system memory.
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*
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* <note>Don't pass the value of cogl_texture_get_rowstride() as the
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* @rowstride argument, the rowstride should be the rowstride you
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* want for the destination @data buffer not the rowstride of the
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* source texture</note>
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*
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* Return value: the size of the texture data in bytes
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*/
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int
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cogl_texture_get_data (CoglTexture *texture,
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CoglPixelFormat format,
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unsigned int rowstride,
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uint8_t *data);
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/**
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* cogl_texture_set_region:
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* @texture: a #CoglTexture.
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* @src_x: upper left coordinate to use from source data.
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* @src_y: upper left coordinate to use from source data.
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* @dst_x: upper left destination horizontal coordinate.
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* @dst_y: upper left destination vertical coordinate.
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* @dst_width: width of destination region to write. (Must be less
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* than or equal to @width)
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* @dst_height: height of destination region to write. (Must be less
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* than or equal to @height)
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* @width: width of source data buffer.
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* @height: height of source data buffer.
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* @format: the #CoglPixelFormat used in the source buffer.
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* @rowstride: rowstride of source buffer (computed from width if none
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* specified)
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* @data: the actual pixel data.
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*
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* Sets the pixels in a rectangular subregion of @texture from an in-memory
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* buffer containing pixel data.
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*
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* <note>The region set can't be larger than the source @data</note>
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*
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* Return value: %TRUE if the subregion upload was successful, and
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* %FALSE otherwise
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*/
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CoglBool
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cogl_texture_set_region (CoglTexture *texture,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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unsigned int dst_width,
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unsigned int dst_height,
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int width,
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int height,
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CoglPixelFormat format,
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unsigned int rowstride,
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const uint8_t *data);
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#if defined (COGL_ENABLE_EXPERIMENTAL_API)
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/**
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* cogl_texture_set_data:
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* @texture a #CoglTexture.
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* @format: the #CoglPixelFormat used in the source @data buffer.
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* @rowstride: rowstride of the source @data buffer (computed from
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* the texture width and @format if it equals 0)
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* @data: the source data, pointing to the first top-left pixel to set
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* @level: The mipmap level to update (Normally 0 for the largest,
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* base texture)
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* @error: A #CoglError to return exceptional errors
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*
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* Sets all the pixels for a given mipmap @level by copying the pixel
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* data pointed to by the @data argument into the given @texture.
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*
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* @data should point to the first pixel to copy corresponding
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* to the top left of the mipmap @level being set.
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*
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* If @rowstride equals 0 then it will be automatically calculated
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* from the width of the mipmap level and the bytes-per-pixel for the
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* given @format.
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*
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* A mipmap @level of 0 corresponds to the largest, base image of a
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* texture and @level 1 is half the width and height of level 0. If
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* dividing any dimension of the previous level by two results in a
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* fraction then round the number down (floor()), but clamp to 1
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* something like this:
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*
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* |[
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* next_width = MAX (1, floor (prev_width));
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* ]|
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*
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* You can determine the number of mipmap levels for a given texture
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* like this:
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*
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* |[
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* n_levels = 1 + floor (log2 (max_dimension));
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* ]|
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*
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* Where %max_dimension is the larger of cogl_texture_get_width() and
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* cogl_texture_get_height().
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*
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* It is an error to pass a @level number >= the number of levels that
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* @texture can have according to the above calculation.
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*
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* <note>Since the storage for a #CoglTexture is allocated lazily then
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* if the given @texture has not previously been allocated then this
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* api can return %FALSE and throw an exceptional @error if there is
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* not enough memory to allocate storage for @texture.</note>
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*
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* Return value: %TRUE if the data upload was successful, and
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* %FALSE otherwise
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*/
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CoglBool
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cogl_texture_set_data (CoglTexture *texture,
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CoglPixelFormat format,
|
|
int rowstride,
|
|
const uint8_t *data,
|
|
int level,
|
|
CoglError **error);
|
|
|
|
/**
|
|
* cogl_texture_set_region_from_bitmap:
|
|
* @texture: a #CoglTexture pointer
|
|
* @src_x: upper left coordinate to use from the source bitmap.
|
|
* @src_y: upper left coordinate to use from the source bitmap
|
|
* @dst_x: upper left destination horizontal coordinate.
|
|
* @dst_y: upper left destination vertical coordinate.
|
|
* @dst_width: width of destination region to write. (Must be less
|
|
* than or equal to the bitmap width)
|
|
* @dst_height: height of destination region to write. (Must be less
|
|
* than or equal to the bitmap height)
|
|
* @bitmap: The source bitmap to read from
|
|
*
|
|
* Copies a specified source region from @bitmap to the position
|
|
* (@src_x, @src_y) of the given destination texture @handle.
|
|
*
|
|
* <note>The region updated can't be larger than the source
|
|
* bitmap</note>
|
|
*
|
|
* Return value: %TRUE if the subregion upload was successful, and
|
|
* %FALSE otherwise
|
|
*
|
|
* Since: 1.8
|
|
* Stability: unstable
|
|
*/
|
|
CoglBool
|
|
cogl_texture_set_region_from_bitmap (CoglTexture *texture,
|
|
int src_x,
|
|
int src_y,
|
|
int dst_x,
|
|
int dst_y,
|
|
unsigned int dst_width,
|
|
unsigned int dst_height,
|
|
CoglBitmap *bitmap);
|
|
#endif
|
|
|
|
/**
|
|
* cogl_texture_new_from_sub_texture:
|
|
* @full_texture: a #CoglTexture pointer
|
|
* @sub_x: X coordinate of the top-left of the subregion
|
|
* @sub_y: Y coordinate of the top-left of the subregion
|
|
* @sub_width: Width in pixels of the subregion
|
|
* @sub_height: Height in pixels of the subregion
|
|
*
|
|
* Creates a new texture which represents a subregion of another
|
|
* texture. The GL resources will be shared so that no new texture
|
|
* data is actually allocated.
|
|
*
|
|
* Sub textures have undefined behaviour texture coordinates outside
|
|
* of the range [0,1] are used. They also do not work with
|
|
* CoglVertexBuffers.
|
|
*
|
|
* The sub texture will keep a reference to the full texture so you do
|
|
* not need to keep one separately if you only want to use the sub
|
|
* texture.
|
|
*
|
|
* Return value: (transfer full): A newly created #CoglTexture or
|
|
* %NULL on failure
|
|
* Since: 1.2
|
|
*/
|
|
CoglTexture *
|
|
cogl_texture_new_from_sub_texture (CoglTexture *full_texture,
|
|
int sub_x,
|
|
int sub_y,
|
|
int sub_width,
|
|
int sub_height);
|
|
|
|
/**
|
|
* cogl_texture_ref: (skip)
|
|
* @texture: a #CoglTexture.
|
|
*
|
|
* Increment the reference count for a cogl texture.
|
|
*
|
|
* Deprecated: 1.2: Use cogl_object_ref() instead
|
|
*
|
|
* Return value: the @texture pointer.
|
|
*/
|
|
COGL_DEPRECATED_FOR (cogl_object_ref)
|
|
void *
|
|
cogl_texture_ref (void *texture);
|
|
|
|
/**
|
|
* cogl_texture_unref: (skip)
|
|
* @texture: a #CoglTexture.
|
|
*
|
|
* Decrement the reference count for a cogl texture.
|
|
*
|
|
* Deprecated: 1.2: Use cogl_object_unref() instead
|
|
*/
|
|
COGL_DEPRECATED_FOR (cogl_object_unref)
|
|
void
|
|
cogl_texture_unref (void *texture);
|
|
|
|
/**
|
|
* cogl_texture_allocate:
|
|
* @texture: A #CoglTexture
|
|
* @error: A #CoglError to return exceptional errors or %NULL
|
|
*
|
|
* Explicitly allocates the storage for the given @texture which
|
|
* allows you to be sure that there is enough memory for the
|
|
* texture and if not then the error can be handled gracefully.
|
|
*
|
|
* <note>Normally applications don't need to use this api directly
|
|
* since the texture will be implicitly allocated when data is set on
|
|
* the texture, or if the texture is attached to a #CoglOffscreen
|
|
* framebuffer and rendered too.</note>
|
|
*
|
|
* Return value: %TRUE if the texture was successfully allocated,
|
|
* otherwise %FALSE and @error will be updated if it
|
|
* wasn't %NULL.
|
|
*/
|
|
CoglBool
|
|
cogl_texture_allocate (CoglTexture *texture,
|
|
CoglError **error);
|
|
|
|
COGL_END_DECLS
|
|
|
|
#endif /* __COGL_TEXTURE_H__ */
|