mutter/cogl/cogl-texture-private.h
Robert Bragg 73e8a6d7ce Allow lazy texture storage allocation
Consistent with how we lazily allocate framebuffers this patch allows us
to instantiate textures but still specify constraints and requirements
before allocating storage so that we can be sure to allocate the most
appropriate/efficient storage.

This adds a cogl_texture_allocate() function that is analogous to
cogl_framebuffer_allocate() which can optionally be called to explicitly
allocate storage and catch any errors. If this function isn't used
explicitly then Cogl will implicitly ensure textures are allocated
before the storage is needed.

It is generally recommended to rely on lazy storage allocation or at
least perform explicit allocation as late as possible so Cogl can be
fully informed about the best way to allocate storage.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit 1fa7c0f10a8a03043e3c75cb079a49625df098b7)

Note: This reverts the cogl_texture_rectangle_new_with_size API change
that dropped the CoglError argument and keeps the semantics of
allocating the texture immediately. This is because Mutter currently
uses this API so we will probably look at updating this later once
we have a corresponding Mutter patch prepared. The other API changes
were kept since they only affected experimental api.
2013-01-22 17:48:17 +00:00

333 lines
12 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, see <http://www.gnu.org/licenses/>.
*
*
*/
#ifndef __COGL_TEXTURE_PRIVATE_H
#define __COGL_TEXTURE_PRIVATE_H
#include "cogl-bitmap-private.h"
#include "cogl-object-private.h"
#include "cogl-pipeline-private.h"
#include "cogl-spans.h"
#include "cogl-meta-texture.h"
#include "cogl-framebuffer.h"
typedef struct _CoglTextureVtable CoglTextureVtable;
/* Encodes three possibiloities result of transforming a quad */
typedef enum {
/* quad doesn't cross the boundaries of a texture */
COGL_TRANSFORM_NO_REPEAT,
/* quad crosses boundaries, hardware wrap mode can handle */
COGL_TRANSFORM_HARDWARE_REPEAT,
/* quad crosses boundaries, needs software fallback;
* for a sliced texture, this might not actually involve
* repeating, just a quad crossing multiple slices */
COGL_TRANSFORM_SOFTWARE_REPEAT,
} CoglTransformResult;
/* Flags given to the pre_paint method */
typedef enum {
/* The texture is going to be used with filters that require
mipmapping. This gives the texture the opportunity to
automatically update the mipmap tree */
COGL_TEXTURE_NEEDS_MIPMAP = 1
} CoglTexturePrePaintFlags;
struct _CoglTextureVtable
{
/* Virtual functions that must be implemented for a texture
backend */
CoglBool is_primitive;
CoglBool (* allocate) (CoglTexture *tex,
CoglError **error);
/* This should update the specified sub region of the texture with a
sub region of the given bitmap. The bitmap is not converted
before being passed so the implementation is expected to call
_cogl_texture_prepare_for_upload with a suitable destination
format before uploading */
CoglBool (* set_region) (CoglTexture *tex,
int src_x,
int src_y,
int dst_x,
int dst_y,
int dst_width,
int dst_height,
int level,
CoglBitmap *bitmap,
CoglError **error);
/* This should copy the image data of the texture into @data. The
requested format will have been first passed through
ctx->texture_driver->find_best_gl_get_data_format so it should
always be a format that is valid for GL (ie, no conversion should
be necessary). */
CoglBool (* get_data) (CoglTexture *tex,
CoglPixelFormat format,
int rowstride,
uint8_t *data);
void (* foreach_sub_texture_in_region) (CoglTexture *tex,
float virtual_tx_1,
float virtual_ty_1,
float virtual_tx_2,
float virtual_ty_2,
CoglMetaTextureCallback callback,
void *user_data);
int (* get_max_waste) (CoglTexture *tex);
CoglBool (* is_sliced) (CoglTexture *tex);
CoglBool (* can_hardware_repeat) (CoglTexture *tex);
void (* transform_coords_to_gl) (CoglTexture *tex,
float *s,
float *t);
CoglTransformResult (* transform_quad_coords_to_gl) (CoglTexture *tex,
float *coords);
CoglBool (* get_gl_texture) (CoglTexture *tex,
GLuint *out_gl_handle,
GLenum *out_gl_target);
/* OpenGL driver specific virtual function */
void (* gl_flush_legacy_texobj_filters) (CoglTexture *tex,
GLenum min_filter,
GLenum mag_filter);
void (* pre_paint) (CoglTexture *tex, CoglTexturePrePaintFlags flags);
void (* ensure_non_quad_rendering) (CoglTexture *tex);
/* OpenGL driver specific virtual function */
void (* gl_flush_legacy_texobj_wrap_modes) (CoglTexture *tex,
GLenum wrap_mode_s,
GLenum wrap_mode_t,
GLenum wrap_mode_p);
CoglPixelFormat (* get_format) (CoglTexture *tex);
GLenum (* get_gl_format) (CoglTexture *tex);
CoglTextureType (* get_type) (CoglTexture *tex);
CoglBool (* is_foreign) (CoglTexture *tex);
/* Only needs to be implemented if is_primitive == TRUE */
void (* set_auto_mipmap) (CoglTexture *texture,
CoglBool value);
};
struct _CoglTexture
{
CoglObject _parent;
CoglContext *context;
GList *framebuffers;
int max_level;
int width;
int height;
CoglBool allocated;
const CoglTextureVtable *vtable;
};
typedef enum _CoglTextureChangeFlags
{
/* Whenever the internals of a texture are changed such that the
* underlying GL textures that represent the CoglTexture change then
* we notify cogl-material.c via
* _cogl_pipeline_texture_pre_change_notify
*/
COGL_TEXTURE_CHANGE_GL_TEXTURES
} CoglTextureChangeFlags;
typedef struct _CoglTexturePixel CoglTexturePixel;
/* This is used by the texture backends to store the first pixel of
each GL texture. This is only used when glGenerateMipmap is not
available so that we can temporarily set GL_GENERATE_MIPMAP and
reupload a pixel */
struct _CoglTexturePixel
{
/* We need to store the format of the pixel because we store the
data in the source format which might end up being different for
each slice if a subregion is updated with a different format */
GLenum gl_format;
GLenum gl_type;
uint8_t data[4];
};
void
_cogl_texture_init (CoglTexture *texture,
CoglContext *ctx,
int width,
int height,
const CoglTextureVtable *vtable);
void
_cogl_texture_free (CoglTexture *texture);
/* This is used to register a type to the list of handle types that
will be considered a texture in cogl_is_texture() */
void
_cogl_texture_register_texture_type (const CoglObjectClass *klass);
#define COGL_TEXTURE_DEFINE(TypeName, type_name) \
COGL_OBJECT_DEFINE_WITH_CODE \
(TypeName, type_name, \
_cogl_texture_register_texture_type (&_cogl_##type_name##_class))
#define COGL_TEXTURE_INTERNAL_DEFINE(TypeName, type_name) \
COGL_OBJECT_INTERNAL_DEFINE_WITH_CODE \
(TypeName, type_name, \
_cogl_texture_register_texture_type (&_cogl_##type_name##_class))
CoglBool
_cogl_texture_can_hardware_repeat (CoglTexture *texture);
void
_cogl_texture_transform_coords_to_gl (CoglTexture *texture,
float *s,
float *t);
CoglTransformResult
_cogl_texture_transform_quad_coords_to_gl (CoglTexture *texture,
float *coords);
void
_cogl_texture_pre_paint (CoglTexture *texture, CoglTexturePrePaintFlags flags);
void
_cogl_texture_ensure_non_quad_rendering (CoglTexture *texture);
/* Utility function to determine which pixel format to use when
dst_format is COGL_PIXEL_FORMAT_ANY. If dst_format is not ANY then
it will just be returned directly */
CoglPixelFormat
_cogl_texture_determine_internal_format (CoglPixelFormat src_format,
CoglPixelFormat dst_format);
/* Utility function to help uploading a bitmap. If the bitmap needs
* premult conversion then a converted copy will be returned,
* otherwise a reference to the original source will be returned.
*
* The GLenums needed for uploading are returned
*/
CoglBitmap *
_cogl_texture_prepare_for_upload (CoglBitmap *src_bmp,
CoglPixelFormat dst_format,
CoglPixelFormat *dst_format_out,
GLenum *out_glintformat,
GLenum *out_glformat,
GLenum *out_gltype,
CoglError **error);
CoglBool
_cogl_texture_is_foreign (CoglTexture *texture);
void
_cogl_texture_associate_framebuffer (CoglTexture *texture,
CoglFramebuffer *framebuffer);
const GList *
_cogl_texture_get_associated_framebuffers (CoglTexture *texture);
void
_cogl_texture_flush_journal_rendering (CoglTexture *texture);
void
_cogl_texture_spans_foreach_in_region (CoglSpan *x_spans,
int n_x_spans,
CoglSpan *y_spans,
int n_y_spans,
CoglTexture **textures,
float *virtual_coords,
float x_normalize_factor,
float y_normalize_factor,
CoglPipelineWrapMode wrap_x,
CoglPipelineWrapMode wrap_y,
CoglMetaTextureCallback callback,
void *user_data);
/*
* _cogl_texture_get_type:
* @texture: a #CoglTexture pointer
*
* Retrieves the texture type of the underlying hardware texture that
* this #CoglTexture will use.
*
* Return value: The type of the hardware texture.
*/
CoglTextureType
_cogl_texture_get_type (CoglTexture *texture);
CoglBool
_cogl_texture_set_region (CoglTexture *texture,
int width,
int height,
CoglPixelFormat format,
int rowstride,
const uint8_t *data,
int dst_x,
int dst_y,
int level,
CoglError **error);
CoglTexture *
_cogl_texture_new_from_bitmap (CoglBitmap *bitmap,
CoglTextureFlags flags,
CoglPixelFormat internal_format,
CoglError **error);
CoglBool
_cogl_texture_set_region_from_bitmap (CoglTexture *texture,
int src_x,
int src_y,
int width,
int height,
CoglBitmap *bmp,
int dst_x,
int dst_y,
int level,
CoglError **error);
CoglBool
_cogl_texture_needs_premult_conversion (CoglPixelFormat src_format,
CoglPixelFormat dst_format);
int
_cogl_texture_get_n_levels (CoglTexture *texture);
void
_cogl_texture_get_level_size (CoglTexture *texture,
int level,
int *width,
int *height,
int *depth);
void
_cogl_texture_set_allocated (CoglTexture *texture,
CoglBool allocated);
#endif /* __COGL_TEXTURE_PRIVATE_H */