cf960cfb3d
The only goal of using COGL buffers is to use them to create textures. cogl_texture_new_from_buffer() is the new symbol to create textures out of buffers.
565 lines
22 KiB
C
565 lines
22 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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#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_TEXTURE_H__
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#define __COGL_TEXTURE_H__
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#include <cogl/cogl-types.h>
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#include <cogl/cogl-defines.h>
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G_BEGIN_DECLS
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/**
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* SECTION:cogl-texture
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* @short_description: Fuctions for creating and manipulating textures
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*
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* COGL allows creating and manipulating GL 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_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 COGL texture with the specified dimensions and pixel format.
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*
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* Return value: a #CoglHandle to the newly created texture or
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* %COGL_INVALID_HANDLE on failure
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*
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* Since: 0.8
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*/
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CoglHandle cogl_texture_new_with_size (guint width,
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guint 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 #GError or %NULL
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*
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* Creates a COGL texture from an image file.
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*
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* Return value: a #CoglHandle to the newly created texture or
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* %COGL_INVALID_HANDLE on failure
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*
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* Since: 0.8
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*/
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CoglHandle cogl_texture_new_from_file (const gchar *filename,
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CoglTextureFlags flags,
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CoglPixelFormat internal_format,
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GError **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 COGL texture based on data residing in memory.
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*
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* Return value: a #CoglHandle to the newly created texture or
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* %COGL_INVALID_HANDLE on failure
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*
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* Since: 0.8
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*/
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CoglHandle cogl_texture_new_from_data (guint width,
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guint height,
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CoglTextureFlags flags,
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CoglPixelFormat format,
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CoglPixelFormat internal_format,
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guint rowstride,
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const guchar *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: maximum horizontal waste.
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* @y_pot_waste: maximum vertical waste.
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* @format: format of the foreign texture.
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*
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* Creates a COGL texture based on an existing OpenGL texture; the
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* width, height and format are passed along since it is not possible
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* to query this from a handle with GLES 1.0.
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*
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* Return value: a #CoglHandle to the newly created texture or
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* %COGL_INVALID_HANDLE on failure
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*
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* Since: 0.8
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*/
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CoglHandle cogl_texture_new_from_foreign (GLuint gl_handle,
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GLenum gl_target,
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GLuint width,
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GLuint height,
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GLuint x_pot_waste,
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GLuint 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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* @bmp_handle: A CoglBitmap handle
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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 COGL texture from a CoglBitmap.
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*
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* Return value: a #CoglHandle to the newly created texture or
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* %COGL_INVALID_HANDLE on failure
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*
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* Since: 1.0
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*/
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CoglHandle cogl_texture_new_from_bitmap (CoglHandle bmp_handle,
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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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* @handle: A CoglHandle
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*
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* Gets whether the given handle references an existing texture object.
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*
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* Return value: %TRUE if the handle references a texture, and
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* %FALSE otherwise
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*/
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gboolean cogl_is_texture (CoglHandle handle);
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/**
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* cogl_texture_get_width:
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* @handle: a #CoglHandle for a texture.
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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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guint cogl_texture_get_width (CoglHandle handle);
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/**
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* cogl_texture_get_height:
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* @handle: a #CoglHandle for a texture.
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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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guint cogl_texture_get_height (CoglHandle handle);
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/**
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* cogl_texture_get_format:
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* @handle: a #CoglHandle for a texture.
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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 cogl_texture_get_format (CoglHandle handle);
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/**
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* cogl_texture_get_rowstride:
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* @handle: a #CoglHandle for a texture.
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*
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* Queries the rowstride of a cogl texture.
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*
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* Return value: the offset in bytes between each consequetive row of pixels
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*/
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guint cogl_texture_get_rowstride (CoglHandle handle);
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/**
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* cogl_texture_get_max_waste:
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* @handle: a #CoglHandle for a texture.
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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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gint cogl_texture_get_max_waste (CoglHandle handle);
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/**
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* cogl_texture_is_sliced:
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* @handle: a #CoglHandle for a texture.
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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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gboolean cogl_texture_is_sliced (CoglHandle handle);
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/**
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* cogl_texture_get_gl_texture:
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* @handle: a #CoglHandle for a texture.
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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 #CoglHandle.
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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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gboolean cogl_texture_get_gl_texture (CoglHandle handle,
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GLuint *out_gl_handle,
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GLenum *out_gl_target);
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/**
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* cogl_texture_get_data:
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* @handle: a #CoglHandle for a texture.
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* @format: the #CoglPixelFormat to store the texture as.
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* @rowstride: the rowstride of @data or retrieved from texture if none is
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* specified.
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* @data: memory location to write contents of buffer, or %NULL if we're
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* only querying 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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* Return value: the size of the texture data in bytes, or 0 if the texture
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* is not valid
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*/
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gint cogl_texture_get_data (CoglHandle handle,
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CoglPixelFormat format,
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guint rowstride,
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guchar *data);
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/**
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* cogl_texture_set_region:
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* @handle: a #CoglHandle.
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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.
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* @dst_height: height of destination region to write.
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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 @handle from an in-memory
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* buffer containing pixel data.
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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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gboolean cogl_texture_set_region (CoglHandle handle,
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gint src_x,
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gint src_y,
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gint dst_x,
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gint dst_y,
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guint dst_width,
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guint dst_height,
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gint width,
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gint height,
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CoglPixelFormat format,
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guint rowstride,
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const guchar *data);
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/**
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* cogl_texture_new_from_sub_texture:
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* @full_texture: a #CoglHandle to an existing texture
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* @sub_x: X coordinate of the top-left of the subregion
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* @sub_y: Y coordinate of the top-left of the subregion
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* @sub_width: Width in pixels of the subregion
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* @sub_height: Height in pixels of the subregion
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*
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* Creates a new texture which represents a subregion of another
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* texture. The GL resources will be shared so that no new texture
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* data is actually allocated.
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*
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* Sub textures have undefined behaviour texture coordinates outside
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* of the range [0,1] are used. They also do not work with
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* CoglVertexBuffers.
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*
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* Return value: a #CoglHandle to the new texture.
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*
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* Since: 1.2
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*/
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CoglHandle cogl_texture_new_from_sub_texture
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(CoglHandle full_texture,
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gint sub_x,
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gint sub_y,
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gint sub_width,
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gint sub_height);
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#if defined (COGL_ENABLE_EXPERIMENTAL_API)
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/**
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* cogl_texture_new_from_buffer:
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* @buffer: the #CoglHandle of a pixel buffer
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* @width: width of texture in pixels or 0
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* @height: height of texture in pixels or 0
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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. If 0 is given the row stride will be deduced from
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* @width and @format or the stride given by cogl_pixel_buffer_new_for_size()
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* @offset: offset in bytes in @buffer from where the texture data starts
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*
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* Creates a new texture using the buffer specified by @handle. If the buffer
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* has been created using cogl_pixel_buffer_new_for_size() it's possible to omit
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* the height and width values already specified at creation time.
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*
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* Return value: a #CoglHandle to the new texture or %COGL_INVALID_HANDLE on
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* failure
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*
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* Since: 1.2
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* Stability: Unstable
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*/
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CoglHandle cogl_texture_new_from_buffer (CoglHandle buffer,
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guint width,
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guint height,
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CoglTextureFlags flags,
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CoglPixelFormat format,
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CoglPixelFormat internal_format,
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guint rowstride,
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guint offset);
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/* the function above is experimental, the actual symbol is suffixed by _EXP so
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* we can ensure ABI compatibility and leave the cogl_buffer namespace free for
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* future use. A bunch of defines translates the symbols documented above into
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* the real symbols */
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CoglHandle cogl_texture_new_from_buffer_EXP
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(CoglHandle buffer,
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guint width,
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guint height,
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CoglTextureFlags flags,
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CoglPixelFormat format,
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CoglPixelFormat internal_format,
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guint rowstride,
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guint offset);
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#define cogl_texture_new_from_buffer cogl_texture_new_from_buffer_EXP
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#endif
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#ifndef COGL_DISABLE_DEPRECATED
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/**
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* cogl_texture_ref:
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* @handle: a @CoglHandle.
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*
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* Increment the reference count for a cogl texture.
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*
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* Deprecated: 1.2: Use cogl_handle_ref() instead
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*
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* Return value: the @handle.
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*/
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CoglHandle cogl_texture_ref (CoglHandle handle);
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/**
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* cogl_texture_unref:
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* @handle: a @CoglHandle.
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*
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* Decrement the reference count for a cogl texture.
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*
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* Deprecated: 1.2: Use cogl_handle_unref() instead
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*/
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void cogl_texture_unref (CoglHandle handle);
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#endif /* COGL_DISABLE_DEPRECATED */
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/**
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* cogl_rectangle_with_texture_coords:
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* @x1: x coordinate upper left on screen.
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* @y1: y coordinate upper left on screen.
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* @x2: x coordinate lower right on screen.
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* @y2: y coordinate lower right on screen.
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* @tx1: x part of texture coordinate to use for upper left pixel
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* @ty1: y part of texture coordinate to use for upper left pixel
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* @tx2: x part of texture coordinate to use for lower right pixel
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* @ty2: y part of texture coordinate to use for left pixel
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*
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* Draw a rectangle using the current material and supply texture coordinates
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* to be used for the first texture layer of the material. To draw the entire
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* texture pass in @tx1=0.0 @ty1=0.0 @tx2=1.0 @ty2=1.0.
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*
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* Since: 1.0
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*/
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void cogl_rectangle_with_texture_coords (float x1,
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float y1,
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float x2,
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float y2,
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float tx1,
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float ty1,
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float tx2,
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float ty2);
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/**
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* cogl_rectangle_with_multitexture_coords:
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* @x1: x coordinate upper left on screen.
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* @y1: y coordinate upper left on screen.
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* @x2: x coordinate lower right on screen.
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* @y2: y coordinate lower right on screen.
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* @tex_coords: (in) (array) (transfer none): An array containing groups of
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* 4 float values: [tx1, ty1, tx2, ty2] that are interpreted as two texture
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* coordinates; one for the upper left texel, and one for the lower right
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* texel. Each value should be between 0.0 and 1.0, where the coordinate
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* (0.0, 0.0) represents the top left of the texture, and (1.0, 1.0) the
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* bottom right.
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* @tex_coords_len: The length of the tex_coords array. (e.g. for one layer
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* and one group of texture coordinates, this would be 4)
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*
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* This function draws a rectangle using the current source material to
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* texture or fill with. As a material may contain multiple texture layers
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* this interface lets you supply texture coordinates for each layer of the
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* material.
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*
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* The first pair of coordinates are for the first layer (with the smallest
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* layer index) and if you supply less texture coordinates than there are
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* layers in the current source material then default texture coordinates
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* (0.0, 0.0, 1.0, 1.0) are generated.
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*
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* Since: 1.0
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*/
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void cogl_rectangle_with_multitexture_coords (float x1,
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float y1,
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float x2,
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float y2,
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const float *tex_coords,
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gint tex_coords_len);
|
|
|
|
/**
|
|
* cogl_rectangles_with_texture_coords:
|
|
* @verts: (in) (array) (transfer none): an array of vertices
|
|
* @n_rects: number of rectangles to draw
|
|
*
|
|
* Draws a series of rectangles in the same way that
|
|
* cogl_rectangle_with_texture_coords() does. In some situations it can give a
|
|
* significant performance boost to use this function rather than
|
|
* calling cogl_rectangle_with_texture_coords() separately for each rectangle.
|
|
*
|
|
* @verts should point to an array of #float<!-- -->s with
|
|
* @n_rects * 8 elements. Each group of 8 values corresponds to the
|
|
* parameters x1, y1, x2, y2, tx1, ty1, tx2 and ty2 and have the same
|
|
* meaning as in cogl_rectangle_with_texture_coords().
|
|
*
|
|
* Since: 0.8.6
|
|
*/
|
|
void cogl_rectangles_with_texture_coords (const float *verts,
|
|
guint n_rects);
|
|
|
|
/**
|
|
* cogl_rectangles:
|
|
* @verts: (in) (array) (transfer none): an array of vertices
|
|
* @n_rects: number of rectangles to draw
|
|
*
|
|
* Draws a series of rectangles in the same way that
|
|
* cogl_rectangle() does. In some situations it can give a
|
|
* significant performance boost to use this function rather than
|
|
* calling cogl_rectangle() separately for each rectangle.
|
|
*
|
|
* @verts should point to an array of #float<!-- -->s with
|
|
* @n_rects * 4 elements. Each group of 4 values corresponds to the
|
|
* parameters x1, y1, x2, and y2, and have the same
|
|
* meaning as in cogl_rectangle().
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void cogl_rectangles (const float *verts,
|
|
guint n_rects);
|
|
|
|
|
|
/**
|
|
* cogl_polygon:
|
|
* @vertices: An array of #CoglTextureVertex structs
|
|
* @n_vertices: The length of the vertices array
|
|
* @use_color: %TRUE if the color member of #CoglTextureVertex should be used
|
|
*
|
|
* Draws a convex polygon using the current source material to fill / texture
|
|
* with according to the texture coordinates passed.
|
|
*
|
|
* If @use_color is %TRUE then the color will be changed for each vertex using
|
|
* the value specified in the color member of #CoglTextureVertex. This can be
|
|
* used for example to make the texture fade out by setting the alpha value of
|
|
* the color.
|
|
*
|
|
* All of the texture coordinates must be in the range [0,1] and repeating the
|
|
* texture is not supported.
|
|
*
|
|
* Because of the way this function is implemented it will currently
|
|
* only work if either the texture is not sliced or the backend is not
|
|
* OpenGL ES and the minifying and magnifying functions are both set
|
|
* to COGL_MATERIAL_FILTER_NEAREST.
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void cogl_polygon (const CoglTextureVertex *vertices,
|
|
guint n_vertices,
|
|
gboolean use_color);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __COGL_TEXTURE_H__ */
|