a9184d5cb7
This exposes 2 experimental functions that make it possible to upload a subregion of a texture from a CoglBuffer by first wrapping the buffer as a CoglBitmap and then allowing uploading of a subregion from a CoglBitmap. The new functions are: cogl_bitmap_new_from_buffer() and cogl_texture_set_region_from_bitmap() Actually for now we are exporting this API for practical reasons since we already had this API internally and it enables a specific feature that was requested, but it is worth nothing that it's quite likely we will replace these with functions that don't involve the CoglBitmap API at some point. For reference: The CoglBitmap API was actually removed from the 2.0 experimental API reference manual some time ago because the hope was that we'd come up with a neater replacement. It doesn't seem entirely clear what the scope of the CoglBitmap api is so it has became a bit of a dumping ground. CoglBitmap is used for image loading, as a means to represent the layout of image data and also internally deals with format conversions. Note: Because we are avoiding including CoglBitmap as part of the 2.0 API these functions aren't currently included in the 2.0 reference manual. Reviewed-by: Neil Roberts <neil@linux.intel.com>
293 lines
11 KiB
C
293 lines
11 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, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifndef __COGL_TEXTURE_PRIVATE_H
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#define __COGL_TEXTURE_PRIVATE_H
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#include "cogl-bitmap-private.h"
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#include "cogl-handle.h"
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#include "cogl-pipeline-private.h"
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#define COGL_TEXTURE(tex) ((CoglTexture *)(tex))
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typedef struct _CoglTexture CoglTexture;
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typedef struct _CoglTextureVtable CoglTextureVtable;
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typedef void (*CoglTextureSliceCallback) (CoglHandle handle,
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const float *slice_coords,
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const float *virtual_coords,
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void *user_data);
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typedef void (* CoglTextureManualRepeatCallback) (const float *coords,
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void *user_data);
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/* Encodes three possibiloities result of transforming a quad */
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typedef enum {
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/* quad doesn't cross the boundaries of a texture */
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COGL_TRANSFORM_NO_REPEAT,
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/* quad crosses boundaries, hardware wrap mode can handle */
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COGL_TRANSFORM_HARDWARE_REPEAT,
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/* quad crosses boundaries, needs software fallback;
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* for a sliced texture, this might not actually involve
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* repeating, just a quad crossing multiple slices */
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COGL_TRANSFORM_SOFTWARE_REPEAT,
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} CoglTransformResult;
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/* Flags given to the pre_paint method */
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typedef enum {
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/* The texture is going to be used with filters that require
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mipmapping. This gives the texture the opportunity to
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automatically update the mipmap tree */
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COGL_TEXTURE_NEEDS_MIPMAP = 1
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} CoglTexturePrePaintFlags;
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struct _CoglTextureVtable
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{
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/* Virtual functions that must be implemented for a texture
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backend */
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/* This should update the specified sub region of the texture with a
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sub region of the given bitmap. The bitmap will have first been
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converted to a suitable format for uploading if neccessary. */
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gboolean (* set_region) (CoglTexture *tex,
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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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CoglBitmap *bitmap);
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/* This should copy the image data of the texture into @data. The
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requested format will have been first passed through
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ctx->texture_driver->find_best_gl_get_data_format so it should
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always be a format that is valid for GL (ie, no conversion should
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be necessary). */
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gboolean (* get_data) (CoglTexture *tex,
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CoglPixelFormat format,
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unsigned int rowstride,
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guint8 *data);
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void (* foreach_sub_texture_in_region) (CoglTexture *tex,
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float virtual_tx_1,
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float virtual_ty_1,
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float virtual_tx_2,
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float virtual_ty_2,
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CoglTextureSliceCallback callback,
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void *user_data);
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int (* get_max_waste) (CoglTexture *tex);
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gboolean (* is_sliced) (CoglTexture *tex);
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gboolean (* can_hardware_repeat) (CoglTexture *tex);
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void (* transform_coords_to_gl) (CoglTexture *tex,
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float *s,
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float *t);
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CoglTransformResult (* transform_quad_coords_to_gl) (CoglTexture *tex,
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float *coords);
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gboolean (* get_gl_texture) (CoglTexture *tex,
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GLuint *out_gl_handle,
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GLenum *out_gl_target);
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void (* set_filters) (CoglTexture *tex,
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GLenum min_filter,
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GLenum mag_filter);
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void (* pre_paint) (CoglTexture *tex, CoglTexturePrePaintFlags flags);
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void (* ensure_non_quad_rendering) (CoglTexture *tex);
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void (* set_wrap_mode_parameters) (CoglTexture *tex,
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GLenum wrap_mode_s,
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GLenum wrap_mode_t,
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GLenum wrap_mode_p);
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CoglPixelFormat (* get_format) (CoglTexture *tex);
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GLenum (* get_gl_format) (CoglTexture *tex);
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int (* get_width) (CoglTexture *tex);
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int (* get_height) (CoglTexture *tex);
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gboolean (* is_foreign) (CoglTexture *tex);
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};
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struct _CoglTexture
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{
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CoglHandleObject _parent;
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GList *framebuffers;
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const CoglTextureVtable *vtable;
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};
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typedef enum _CoglTextureChangeFlags
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{
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/* Whenever the internals of a texture are changed such that the
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* underlying GL textures that represent the CoglTexture change then
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* we notify cogl-material.c via
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* _cogl_pipeline_texture_pre_change_notify
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*/
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COGL_TEXTURE_CHANGE_GL_TEXTURES
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} CoglTextureChangeFlags;
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typedef struct _CoglTexturePixel CoglTexturePixel;
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/* This is used by the texture backends to store the first pixel of
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each GL texture. This is only used when glGenerateMipmap is not
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available so that we can temporarily set GL_GENERATE_MIPMAP and
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reupload a pixel */
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struct _CoglTexturePixel
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{
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/* We need to store the format of the pixel because we store the
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data in the source format which might end up being different for
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each slice if a subregion is updated with a different format */
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GLenum gl_format;
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GLenum gl_type;
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guint8 data[4];
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};
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void
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_cogl_texture_init (CoglTexture *texture,
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const CoglTextureVtable *vtable);
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void
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_cogl_texture_free (CoglTexture *texture);
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/* This is used to register a type to the list of handle types that
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will be considered a texture in cogl_is_texture() */
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void
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_cogl_texture_register_texture_type (GQuark type);
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#define COGL_TEXTURE_DEFINE(TypeName, type_name) \
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COGL_HANDLE_DEFINE_WITH_CODE \
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(TypeName, type_name, \
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_cogl_texture_register_texture_type (_cogl_handle_ \
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## type_name ## _get_type ()))
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#define COGL_TEXTURE_INTERNAL_DEFINE(TypeName, type_name) \
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COGL_HANDLE_INTERNAL_DEFINE_WITH_CODE \
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(TypeName, type_name, \
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_cogl_texture_register_texture_type (_cogl_handle_ \
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## type_name ## _get_type ()))
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void
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_cogl_texture_foreach_sub_texture_in_region (CoglHandle handle,
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float virtual_tx_1,
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float virtual_ty_1,
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float virtual_tx_2,
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float virtual_ty_2,
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CoglTextureSliceCallback callback,
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void *user_data);
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gboolean
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_cogl_texture_can_hardware_repeat (CoglHandle handle);
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void
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_cogl_texture_transform_coords_to_gl (CoglHandle handle,
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float *s,
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float *t);
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CoglTransformResult
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_cogl_texture_transform_quad_coords_to_gl (CoglHandle handle,
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float *coords);
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GLenum
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_cogl_texture_get_gl_format (CoglHandle handle);
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void
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_cogl_texture_set_wrap_mode_parameters (CoglHandle handle,
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GLenum wrap_mode_s,
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GLenum wrap_mode_t,
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GLenum wrap_mode_p);
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void
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_cogl_texture_set_filters (CoglHandle handle,
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GLenum min_filter,
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GLenum mag_filter);
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void
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_cogl_texture_pre_paint (CoglHandle handle, CoglTexturePrePaintFlags flags);
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void
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_cogl_texture_ensure_non_quad_rendering (CoglHandle handle);
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/* Utility function to determine which pixel format to use when
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dst_format is COGL_PIXEL_FORMAT_ANY. If dst_format is not ANY then
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it will just be returned directly */
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CoglPixelFormat
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_cogl_texture_determine_internal_format (CoglPixelFormat src_format,
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CoglPixelFormat dst_format);
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/* Utility function to help uploading a bitmap. If the bitmap needs
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premult conversion then it will be copied and *copied_bitmap will
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be set to TRUE. Otherwise dst_bmp will be set to a shallow copy of
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src_bmp. The GLenums needed for uploading are returned */
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CoglBitmap *
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_cogl_texture_prepare_for_upload (CoglBitmap *src_bmp,
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CoglPixelFormat dst_format,
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CoglPixelFormat *dst_format_out,
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GLenum *out_glintformat,
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GLenum *out_glformat,
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GLenum *out_gltype);
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void
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_cogl_texture_prep_gl_alignment_for_pixels_upload (int pixels_rowstride);
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void
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_cogl_texture_prep_gl_alignment_for_pixels_download (int pixels_rowstride);
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/* Utility function for implementing manual repeating. Even texture
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backends that always support hardware repeating need this because
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when foreach_sub_texture_in_region is invoked Cogl will set the
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wrap mode to GL_CLAMP_TO_EDGE so hardware repeating can't be
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done */
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void
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_cogl_texture_iterate_manual_repeats (CoglTextureManualRepeatCallback callback,
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float tx_1, float ty_1,
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float tx_2, float ty_2,
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void *user_data);
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/* Utility function to use as a fallback for getting the data of any
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texture via the framebuffer */
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gboolean
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_cogl_texture_draw_and_read (CoglHandle handle,
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CoglBitmap *target_bmp,
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GLuint target_gl_format,
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GLuint target_gl_type);
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gboolean
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_cogl_texture_is_foreign (CoglHandle handle);
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void
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_cogl_texture_associate_framebuffer (CoglHandle handle,
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CoglFramebuffer *framebuffer);
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const GList *
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_cogl_texture_get_associated_framebuffers (CoglHandle handle);
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void
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_cogl_texture_flush_journal_rendering (CoglHandle handle);
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#endif /* __COGL_TEXTURE_PRIVATE_H */
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