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The idea is that CoglPixelBuffer should just be a buffer that can be used for pixel data and it has no idea about the details of any images that are stored in it. This is analogous to CoglAttributeBuffer which itself does not have any information about the attributes. When you want to use a pixel buffer you should create a CoglBitmap which points to a region of the attribute buffer and provides the extra needed information such as the width, height and format. That way it is also possible to use a single CoglPixelBuffer with multiple bitmaps. The changes that are made are: • cogl_pixel_buffer_new_with_size has been removed and in its place is cogl_bitmap_new_with_size. This will create a pixel buffer at the right size and rowstride for the given width/height/format and immediately create a single CoglBitmap to point into it. The old function had an out-parameter for the stride of the image but with the new API this should be queriable from the bitmap (although there is no function for this yet). • There is now a public cogl_pixel_buffer_new constructor. This takes a size in bytes and data pointer similarly to cogl_attribute_buffer_new. • cogl_texture_new_from_buffer has been removed. If you want to create a texture from a pixel buffer you should wrap it up in a bitmap first. There is already API to create a texture from a bitmap. This patch also does a bit of header juggling because cogl-context.h was including cogl-texture.h and cogl-framebuffer.h which were causing some circular dependencies when cogl-bitmap.h includes cogl-context.h. These weren't actually needed in cogl-context.h itself but a few other headers were relying on them being included so this adds the #includes where necessary. Reviewed-by: Robert Bragg <robert@linux.intel.com>
294 lines
11 KiB
C
294 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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#include "cogl-spans.h"
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#include "cogl-meta-texture.h"
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#include "cogl-framebuffer.h"
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typedef struct _CoglTextureVtable CoglTextureVtable;
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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 is not converted
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before being passed so the implementation is expected to call
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_cogl_texture_prepare_for_upload with a suitable destination
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format before uploading */
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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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CoglMetaTextureCallback 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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CoglTextureType (* get_type) (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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CoglObject _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 (const CoglObjectClass *klass);
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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_##type_name##_class))
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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_##type_name##_class))
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gboolean
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_cogl_texture_can_hardware_repeat (CoglTexture *texture);
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void
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_cogl_texture_transform_coords_to_gl (CoglTexture *texture,
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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 (CoglTexture *texture,
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float *coords);
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GLenum
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_cogl_texture_get_gl_format (CoglTexture *texture);
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void
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_cogl_texture_set_wrap_mode_parameters (CoglTexture *texture,
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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 (CoglTexture *texture,
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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 (CoglTexture *texture, CoglTexturePrePaintFlags flags);
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void
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_cogl_texture_ensure_non_quad_rendering (CoglTexture *texture);
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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 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 (CoglTexture *texture,
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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 (CoglTexture *texture);
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void
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_cogl_texture_associate_framebuffer (CoglTexture *texture,
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CoglFramebuffer *framebuffer);
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const GList *
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_cogl_texture_get_associated_framebuffers (CoglTexture *texture);
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void
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_cogl_texture_flush_journal_rendering (CoglTexture *texture);
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void
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_cogl_texture_spans_foreach_in_region (CoglSpan *x_spans,
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int n_x_spans,
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CoglSpan *y_spans,
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int n_y_spans,
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CoglTexture **textures,
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float *virtual_coords,
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float x_normalize_factor,
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float y_normalize_factor,
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CoglPipelineWrapMode wrap_x,
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CoglPipelineWrapMode wrap_y,
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CoglMetaTextureCallback callback,
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void *user_data);
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/*
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* _cogl_texture_get_type:
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* @texture: a #CoglTexture pointer
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*
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* Retrieves the texture type of the underlying hardware texture that
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* this #CoglTexture will use.
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*
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* Return value: The type of the hardware texture.
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*/
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CoglTextureType
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_cogl_texture_get_type (CoglTexture *texture);
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#endif /* __COGL_TEXTURE_PRIVATE_H */
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