mirror of
https://github.com/brl/mutter.git
synced 2024-11-25 17:40:40 -05:00
476 lines
18 KiB
C
476 lines
18 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2007,2008,2009 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
|
|
#error "Only <cogl/cogl.h> can be included directly."
|
|
#endif
|
|
|
|
#ifndef __COGL_TEXTURE_H__
|
|
#define __COGL_TEXTURE_H__
|
|
|
|
#include <cogl/cogl-types.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
/**
|
|
* SECTION:cogl-texture
|
|
* @short_description: Fuctions for creating and manipulating textures
|
|
*
|
|
* COGL allows creating and manipulating GL textures using a uniform
|
|
* API that tries to hide all the various complexities of creating,
|
|
* loading and manipulating textures.
|
|
*/
|
|
|
|
#define COGL_TEXTURE_MAX_WASTE 127
|
|
|
|
/**
|
|
* cogl_texture_new_with_size:
|
|
* @width: width of texture in pixels.
|
|
* @height: height of texture in pixels.
|
|
* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
|
|
* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
|
|
* texture.
|
|
*
|
|
* Creates a new COGL texture with the specified dimensions and pixel format.
|
|
*
|
|
* Return value: a #CoglHandle to the newly created texture or
|
|
* %COGL_INVALID_HANDLE on failure
|
|
*
|
|
* Since: 0.8
|
|
*/
|
|
CoglHandle cogl_texture_new_with_size (guint width,
|
|
guint height,
|
|
CoglTextureFlags flags,
|
|
CoglPixelFormat internal_format);
|
|
|
|
/**
|
|
* cogl_texture_new_from_file:
|
|
* @filename: the file to load
|
|
* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
|
|
* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
|
|
* texture. If %COGL_PIXEL_FORMAT_ANY is given then a premultiplied
|
|
* format similar to the format of the source data will be used. The
|
|
* default blending equations of Cogl expect premultiplied color data;
|
|
* the main use of passing a non-premultiplied format here is if you
|
|
* have non-premultiplied source data and are going to adjust the blend
|
|
* mode (see cogl_material_set_blend()) or use the data for something
|
|
* other than straight blending.
|
|
* @error: return location for a #GError or %NULL
|
|
*
|
|
* Creates a COGL texture from an image file.
|
|
*
|
|
* Return value: a #CoglHandle to the newly created texture or
|
|
* %COGL_INVALID_HANDLE on failure
|
|
*
|
|
* Since: 0.8
|
|
*/
|
|
CoglHandle cogl_texture_new_from_file (const gchar *filename,
|
|
CoglTextureFlags flags,
|
|
CoglPixelFormat internal_format,
|
|
GError **error);
|
|
|
|
/**
|
|
* cogl_texture_new_from_data:
|
|
* @width: width of texture in pixels
|
|
* @height: height of texture in pixels
|
|
* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
|
|
* @format: the #CoglPixelFormat the buffer is stored in in RAM
|
|
* @internal_format: the #CoglPixelFormat that will be used for storing
|
|
* the buffer on the GPU. If COGL_PIXEL_FORMAT_ANY is given then a
|
|
* premultiplied format similar to the format of the source data will
|
|
* be used. The default blending equations of Cogl expect premultiplied
|
|
* color data; the main use of passing a non-premultiplied format here
|
|
* is if you have non-premultiplied source data and are going to adjust
|
|
* the blend mode (see cogl_material_set_blend()) or use the data for
|
|
* something other than straight blending.
|
|
* @rowstride: the memory offset in bytes between the starts of
|
|
* scanlines in @data
|
|
* @data: pointer the memory region where the source buffer resides
|
|
*
|
|
* Creates a new COGL texture based on data residing in memory.
|
|
*
|
|
* Return value: a #CoglHandle to the newly created texture or
|
|
* %COGL_INVALID_HANDLE on failure
|
|
*
|
|
* Since: 0.8
|
|
*/
|
|
CoglHandle cogl_texture_new_from_data (guint width,
|
|
guint height,
|
|
CoglTextureFlags flags,
|
|
CoglPixelFormat format,
|
|
CoglPixelFormat internal_format,
|
|
guint rowstride,
|
|
const guchar *data);
|
|
|
|
/**
|
|
* cogl_texture_new_from_foreign:
|
|
* @gl_handle: opengl handle of foreign texture.
|
|
* @gl_target: opengl target type of foreign texture
|
|
* @width: width of foreign texture
|
|
* @height: height of foreign texture.
|
|
* @x_pot_waste: maximum horizontal waste.
|
|
* @y_pot_waste: maximum vertical waste.
|
|
* @format: format of the foreign texture.
|
|
*
|
|
* Creates a COGL texture based on an existing OpenGL texture; the
|
|
* width, height and format are passed along since it is not possible
|
|
* to query this from a handle with GLES 1.0.
|
|
*
|
|
* Return value: a #CoglHandle to the newly created texture or
|
|
* %COGL_INVALID_HANDLE on failure
|
|
*
|
|
* Since: 0.8
|
|
*/
|
|
CoglHandle cogl_texture_new_from_foreign (GLuint gl_handle,
|
|
GLenum gl_target,
|
|
GLuint width,
|
|
GLuint height,
|
|
GLuint x_pot_waste,
|
|
GLuint y_pot_waste,
|
|
CoglPixelFormat format);
|
|
|
|
/**
|
|
* cogl_texture_new_from_bitmap:
|
|
* @bmp_handle: A CoglBitmap handle
|
|
* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE
|
|
* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
|
|
* texture
|
|
*
|
|
* Creates a COGL texture from a CoglBitmap.
|
|
*
|
|
* Return value: a #CoglHandle to the newly created texture or
|
|
* %COGL_INVALID_HANDLE on failure
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
CoglHandle cogl_texture_new_from_bitmap (CoglHandle bmp_handle,
|
|
CoglTextureFlags flags,
|
|
CoglPixelFormat internal_format);
|
|
|
|
/**
|
|
* cogl_is_texture:
|
|
* @handle: A CoglHandle
|
|
*
|
|
* Gets whether the given handle references an existing texture object.
|
|
*
|
|
* Return value: %TRUE if the handle references a texture, and
|
|
* %FALSE otherwise
|
|
*/
|
|
gboolean cogl_is_texture (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_texture_get_width:
|
|
* @handle: a #CoglHandle for a texture.
|
|
*
|
|
* Queries the width of a cogl texture.
|
|
*
|
|
* Return value: the width of the GPU side texture in pixels
|
|
*/
|
|
guint cogl_texture_get_width (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_texture_get_height:
|
|
* @handle: a #CoglHandle for a texture.
|
|
*
|
|
* Queries the height of a cogl texture.
|
|
*
|
|
* Return value: the height of the GPU side texture in pixels
|
|
*/
|
|
guint cogl_texture_get_height (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_texture_get_format:
|
|
* @handle: a #CoglHandle for a texture.
|
|
*
|
|
* Queries the #CoglPixelFormat of a cogl texture.
|
|
*
|
|
* Return value: the #CoglPixelFormat of the GPU side texture
|
|
*/
|
|
CoglPixelFormat cogl_texture_get_format (CoglHandle handle);
|
|
|
|
|
|
/**
|
|
* cogl_texture_get_rowstride:
|
|
* @handle: a #CoglHandle for a texture.
|
|
*
|
|
* Queries the rowstride of a cogl texture.
|
|
*
|
|
* Return value: the offset in bytes between each consequetive row of pixels
|
|
*/
|
|
guint cogl_texture_get_rowstride (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_texture_get_max_waste:
|
|
* @handle: a #CoglHandle for a texture.
|
|
*
|
|
* Queries the maximum wasted (unused) pixels in one dimension of a GPU side
|
|
* texture.
|
|
*
|
|
* Return value: the maximum waste
|
|
*/
|
|
gint cogl_texture_get_max_waste (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_texture_is_sliced:
|
|
* @handle: a #CoglHandle for a texture.
|
|
*
|
|
* Queries if a texture is sliced (stored as multiple GPU side tecture
|
|
* objects).
|
|
*
|
|
* Return value: %TRUE if the texture is sliced, %FALSE if the texture
|
|
* is stored as a single GPU texture
|
|
*/
|
|
gboolean cogl_texture_is_sliced (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_texture_get_gl_texture:
|
|
* @handle: a #CoglHandle for a texture.
|
|
* @out_gl_handle: (out) (allow-none): pointer to return location for the
|
|
* textures GL handle, or %NULL.
|
|
* @out_gl_target: (out) (allow-none): pointer to return location for the
|
|
* GL target type, or %NULL.
|
|
*
|
|
* Queries the GL handles for a GPU side texture through its #CoglHandle.
|
|
*
|
|
* If the texture is spliced the data for the first sub texture will be
|
|
* queried.
|
|
*
|
|
* Return value: %TRUE if the handle was successfully retrieved, %FALSE
|
|
* if the handle was invalid
|
|
*/
|
|
gboolean cogl_texture_get_gl_texture (CoglHandle handle,
|
|
GLuint *out_gl_handle,
|
|
GLenum *out_gl_target);
|
|
|
|
/**
|
|
* cogl_texture_get_data:
|
|
* @handle: a #CoglHandle for a texture.
|
|
* @format: the #CoglPixelFormat to store the texture as.
|
|
* @rowstride: the rowstride of @data or retrieved from texture if none is
|
|
* specified.
|
|
* @data: memory location to write contents of buffer, or %NULL if we're
|
|
* only querying the data size through the return value.
|
|
*
|
|
* Copies the pixel data from a cogl texture to system memory.
|
|
*
|
|
* Return value: the size of the texture data in bytes, or 0 if the texture
|
|
* is not valid
|
|
*/
|
|
gint cogl_texture_get_data (CoglHandle handle,
|
|
CoglPixelFormat format,
|
|
guint rowstride,
|
|
guchar *data);
|
|
|
|
/**
|
|
* cogl_texture_set_region:
|
|
* @handle: a #CoglHandle.
|
|
* @src_x: upper left coordinate to use from source data.
|
|
* @src_y: upper left coordinate to use from source data.
|
|
* @dst_x: upper left destination horizontal coordinate.
|
|
* @dst_y: upper left destination vertical coordinate.
|
|
* @dst_width: width of destination region to write.
|
|
* @dst_height: height of destination region to write.
|
|
* @width: width of source data buffer.
|
|
* @height: height of source data buffer.
|
|
* @format: the #CoglPixelFormat used in the source buffer.
|
|
* @rowstride: rowstride of source buffer (computed from width if none
|
|
* specified)
|
|
* @data: the actual pixel data.
|
|
*
|
|
* Sets the pixels in a rectangular subregion of @handle from an in-memory
|
|
* buffer containing pixel data.
|
|
*
|
|
* Return value: %TRUE if the subregion upload was successful, and
|
|
* %FALSE otherwise
|
|
*/
|
|
gboolean cogl_texture_set_region (CoglHandle handle,
|
|
gint src_x,
|
|
gint src_y,
|
|
gint dst_x,
|
|
gint dst_y,
|
|
guint dst_width,
|
|
guint dst_height,
|
|
gint width,
|
|
gint height,
|
|
CoglPixelFormat format,
|
|
guint rowstride,
|
|
const guchar *data);
|
|
|
|
#ifndef COGL_DISABLE_DEPRECATED
|
|
|
|
/**
|
|
* cogl_texture_ref:
|
|
* @handle: a @CoglHandle.
|
|
*
|
|
* Increment the reference count for a cogl texture.
|
|
*
|
|
* Deprecated: 1.2: Use cogl_handle_ref() instead
|
|
*
|
|
* Return value: the @handle.
|
|
*/
|
|
CoglHandle cogl_texture_ref (CoglHandle handle);
|
|
|
|
/**
|
|
* cogl_texture_unref:
|
|
* @handle: a @CoglHandle.
|
|
*
|
|
* Decrement the reference count for a cogl texture.
|
|
*
|
|
* Deprecated: 1.2: Use cogl_handle_unref() instead
|
|
*/
|
|
void cogl_texture_unref (CoglHandle handle);
|
|
|
|
#endif /* COGL_DISABLE_DEPRECATED */
|
|
|
|
/**
|
|
* cogl_rectangle_with_texture_coords:
|
|
* @x1: x coordinate upper left on screen.
|
|
* @y1: y coordinate upper left on screen.
|
|
* @x2: x coordinate lower right on screen.
|
|
* @y2: y coordinate lower right on screen.
|
|
* @tx1: x part of texture coordinate to use for upper left pixel
|
|
* @ty1: y part of texture coordinate to use for upper left pixel
|
|
* @tx2: x part of texture coordinate to use for lower right pixel
|
|
* @ty2: y part of texture coordinate to use for left pixel
|
|
*
|
|
* Draw a rectangle using the current material and supply texture coordinates
|
|
* to be used for the first texture layer of the material. To draw the entire
|
|
* texture pass in @tx1=0.0 @ty1=0.0 @tx2=1.0 @ty2=1.0.
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void cogl_rectangle_with_texture_coords (float x1,
|
|
float y1,
|
|
float x2,
|
|
float y2,
|
|
float tx1,
|
|
float ty1,
|
|
float tx2,
|
|
float ty2);
|
|
|
|
/**
|
|
* cogl_rectangle_with_multitexture_coords:
|
|
* @x1: x coordinate upper left on screen.
|
|
* @y1: y coordinate upper left on screen.
|
|
* @x2: x coordinate lower right on screen.
|
|
* @y2: y coordinate lower right on screen.
|
|
* @tex_coords: (in) (array) (transfer none): An array containing groups of
|
|
* 4 float values: [tx1, ty1, tx2, ty2] that are interpreted as two texture
|
|
* coordinates; one for the upper left texel, and one for the lower right
|
|
* texel. Each value should be between 0.0 and 1.0, where the coordinate
|
|
* (0.0, 0.0) represents the top left of the texture, and (1.0, 1.0) the
|
|
* bottom right.
|
|
* @tex_coords_len: The length of the tex_coords array. (e.g. for one layer
|
|
* and one group of texture coordinates, this would be 4)
|
|
*
|
|
* This function draws a rectangle using the current source material to
|
|
* texture or fill with. As a material may contain multiple texture layers
|
|
* this interface lets you supply texture coordinates for each layer of the
|
|
* material.
|
|
*
|
|
* The first pair of coordinates are for the first layer (with the smallest
|
|
* layer index) and if you supply less texture coordinates than there are
|
|
* layers in the current source material then default texture coordinates
|
|
* (0.0, 0.0, 1.0, 1.0) are generated.
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void cogl_rectangle_with_multitexture_coords (float x1,
|
|
float y1,
|
|
float x2,
|
|
float y2,
|
|
const float *tex_coords,
|
|
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 CGL_NEAREST.
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void cogl_polygon (CoglTextureVertex *vertices,
|
|
guint n_vertices,
|
|
gboolean use_color);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __COGL_TEXTURE_H__ */
|