1b2dd815b4
This adds much more comprehensive support for gobject-introspection based bindings by registering all objects as fundamental types that inherit from CoglObject, and all structs as boxed types. Co-Author: Robert Bragg <robert@linux.intel.com> Reviewed-by: Neil Roberts <neil@linux.intel.com>
219 lines
8.2 KiB
C
219 lines
8.2 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* A Low Level GPU Graphics and Utilities API
|
|
*
|
|
* Copyright (C) 2011 Intel Corporation.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person
|
|
* obtaining a copy of this software and associated documentation
|
|
* files (the "Software"), to deal in the Software without
|
|
* restriction, including without limitation the rights to use, copy,
|
|
* modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
* of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*
|
|
*
|
|
* Authors:
|
|
* Robert Bragg <robert@linux.intel.com>
|
|
*/
|
|
|
|
#ifndef __COGL_TEXURE_RECTANGLE_H
|
|
#define __COGL_TEXURE_RECTANGLE_H
|
|
|
|
#include "cogl-context.h"
|
|
|
|
COGL_BEGIN_DECLS
|
|
|
|
/**
|
|
* SECTION:cogl-texture-rectangle
|
|
* @short_description: Functions for creating and manipulating rectangle
|
|
* textures for use with non-normalized coordinates.
|
|
*
|
|
* These functions allow low-level "rectangle" textures to be allocated.
|
|
* These textures are never constrained to power-of-two sizes but they
|
|
* also don't support having a mipmap and can only be wrapped with
|
|
* %COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE.
|
|
*
|
|
* The most notable difference between rectangle textures and 2D
|
|
* textures is that rectangle textures are sampled using un-normalized
|
|
* texture coordinates, so instead of using coordinates (0,0) and
|
|
* (1,1) to map to the top-left and bottom right corners of the
|
|
* texture you would instead use (0,0) and (width,height).
|
|
*
|
|
* The use of non-normalized coordinates can be particularly
|
|
* convenient when writing glsl shaders that use a texture as a lookup
|
|
* table since you don't need to upload separate uniforms to map
|
|
* normalized coordinates to texels.
|
|
*
|
|
* If you want to sample from a rectangle texture from GLSL you should
|
|
* use the sampler2DRect sampler type.
|
|
*
|
|
* Applications wanting to use #CoglTextureRectangle should first check
|
|
* for the %COGL_FEATURE_ID_TEXTURE_RECTANGLE feature using
|
|
* cogl_has_feature().
|
|
*/
|
|
|
|
typedef struct _CoglTextureRectangle CoglTextureRectangle;
|
|
#define COGL_TEXTURE_RECTANGLE(X) ((CoglTextureRectangle *)X)
|
|
|
|
#ifdef COGL_HAS_GTYPE_SUPPORT
|
|
/**
|
|
* cogl_texture_rectangle_get_gtype:
|
|
*
|
|
* Returns: a #GType that can be used with the GLib type system.
|
|
*/
|
|
GType cogl_texture_rectangle_get_gtype (void);
|
|
#endif
|
|
|
|
/**
|
|
* cogl_is_texture_rectangle:
|
|
* @object: A #CoglObject
|
|
*
|
|
* Gets whether the given object references an existing
|
|
* #CoglTextureRectangle object.
|
|
*
|
|
* Return value: %TRUE if the object references a
|
|
* #CoglTextureRectangle, %FALSE otherwise.
|
|
*/
|
|
CoglBool
|
|
cogl_is_texture_rectangle (void *object);
|
|
|
|
/**
|
|
* cogl_texture_rectangle_new_with_size:
|
|
* @ctx: A #CoglContext pointer
|
|
* @width: The texture width to allocate
|
|
* @height: The texture height to allocate
|
|
*
|
|
* Creates a new #CoglTextureRectangle texture with a given @width,
|
|
* and @height. This texture is a low-level texture that the GPU can
|
|
* sample from directly unlike high-level textures such as
|
|
* #CoglTexture2DSliced and #CoglAtlasTexture.
|
|
*
|
|
* <note>Unlike for #CoglTexture2D textures, coordinates for
|
|
* #CoglTextureRectangle textures should not be normalized. So instead
|
|
* of using the coordinate (1, 1) to sample the bottom right corner of
|
|
* a rectangle texture you would use (@width, @height) where @width
|
|
* and @height are the width and height of the texture.</note>
|
|
*
|
|
* <note>If you want to sample from a rectangle texture from GLSL you
|
|
* should use the sampler2DRect sampler type.</note>
|
|
*
|
|
* <note>Applications wanting to use #CoglTextureRectangle should
|
|
* first check for the %COGL_FEATURE_ID_TEXTURE_RECTANGLE feature
|
|
* using cogl_has_feature().</note>
|
|
*
|
|
* The storage for the texture is not allocated before this function
|
|
* returns. You can call cogl_texture_allocate() to explicitly
|
|
* allocate the underlying storage or preferably let Cogl
|
|
* automatically allocate storage lazily when it may know more about
|
|
* how the texture is going to be used and can optimize how it is
|
|
* allocated.
|
|
*
|
|
* Returns value: (transfer full): A pointer to a new #CoglTextureRectangle
|
|
* object with no storage allocated yet.
|
|
*
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
CoglTextureRectangle *
|
|
cogl_texture_rectangle_new_with_size (CoglContext *ctx,
|
|
int width,
|
|
int height);
|
|
|
|
/**
|
|
* cogl_texture_rectangle_new_from_bitmap:
|
|
* @bitmap: A #CoglBitmap
|
|
*
|
|
* Allocates a new #CoglTextureRectangle texture which will be
|
|
* initialized with the pixel data from @bitmap. This texture is a
|
|
* low-level texture that the GPU can sample from directly unlike
|
|
* high-level textures such as #CoglTexture2DSliced and
|
|
* #CoglAtlasTexture.
|
|
*
|
|
* <note>Unlike for #CoglTexture2D textures, coordinates for
|
|
* #CoglTextureRectangle textures should not be normalized. So instead
|
|
* of using the coordinate (1, 1) to sample the bottom right corner of
|
|
* a rectangle texture you would use (@width, @height) where @width
|
|
* and @height are the width and height of the texture.</note>
|
|
*
|
|
* <note>If you want to sample from a rectangle texture from GLSL you
|
|
* should use the sampler2DRect sampler type.</note>
|
|
*
|
|
* <note>Applications wanting to use #CoglTextureRectangle should
|
|
* first check for the %COGL_FEATURE_ID_TEXTURE_RECTANGLE feature
|
|
* using cogl_has_feature().</note>
|
|
*
|
|
* The storage for the texture is not allocated before this function
|
|
* returns. You can call cogl_texture_allocate() to explicitly
|
|
* allocate the underlying storage or preferably let Cogl
|
|
* automatically allocate storage lazily when it may know more about
|
|
* how the texture is going to be used and can optimize how it is
|
|
* allocated.
|
|
*
|
|
* Return value: (transfer full): A pointer to a new
|
|
* #CoglTextureRectangle texture.
|
|
* Since: 2.0
|
|
* Stability: unstable
|
|
*/
|
|
CoglTextureRectangle *
|
|
cogl_texture_rectangle_new_from_bitmap (CoglBitmap *bitmap);
|
|
|
|
/**
|
|
* cogl_texture_rectangle_new_from_foreign:
|
|
* @ctx: A #CoglContext
|
|
* @gl_handle: A GL handle for a GL_TEXTURE_RECTANGLE texture object
|
|
* @width: Width of the foreign GL texture
|
|
* @height: Height of the foreign GL texture
|
|
* @format: The format of the texture
|
|
*
|
|
* Wraps an existing GL_TEXTURE_RECTANGLE texture object as a
|
|
* #CoglTextureRectangle. This can be used for integrating Cogl with
|
|
* software using OpenGL directly.
|
|
*
|
|
* <note>Unlike for #CoglTexture2D textures, coordinates for
|
|
* #CoglTextureRectangle textures should not be normalized. So instead
|
|
* of using the coordinate (1, 1) to sample the bottom right corner of
|
|
* a rectangle texture you would use (@width, @height) where @width
|
|
* and @height are the width and height of the texture.</note>
|
|
*
|
|
* <note>The results are undefined for passing an invalid @gl_handle
|
|
* or if @width or @height don't have the correct texture
|
|
* geometry.</note>
|
|
*
|
|
* <note>If you want to sample from a rectangle texture from GLSL you
|
|
* should use the sampler2DRect sampler type.</note>
|
|
*
|
|
* <note>Applications wanting to use #CoglTextureRectangle should
|
|
* first check for the %COGL_FEATURE_ID_TEXTURE_RECTANGLE feature
|
|
* using cogl_has_feature().</note>
|
|
*
|
|
* The texture is still configurable until it has been allocated so
|
|
* for example you can declare whether the texture is premultiplied
|
|
* with cogl_texture_set_premultiplied().
|
|
*
|
|
* Return value: (transfer full): A new #CoglTextureRectangle texture
|
|
*/
|
|
CoglTextureRectangle *
|
|
cogl_texture_rectangle_new_from_foreign (CoglContext *ctx,
|
|
unsigned int gl_handle,
|
|
int width,
|
|
int height,
|
|
CoglPixelFormat format);
|
|
|
|
COGL_END_DECLS
|
|
|
|
#endif /* __COGL_TEXURE_RECTANGLE_H */
|