0f5f4e8645
We've had complaints that our Cogl code/headers are a bit "special" so
this is a first pass at tidying things up by giving them some
consistency. These changes are all consistent with how new code in Cogl
is being written, but the style isn't consistently applied across all
code yet.
There are two parts to this patch; but since each one required a large
amount of effort to maintain tidy indenting it made sense to combine the
changes to reduce the time spent re indenting the same lines.
The first change is to use a consistent style for declaring function
prototypes in headers. Cogl headers now consistently use this style for
prototypes:
return_type
cogl_function_name (CoglType arg0,
CoglType arg1);
Not everyone likes this style, but it seems that most of the currently
active Cogl developers agree on it.
The second change is to constrain the use of redundant glib data types
in Cogl. Uses of gint, guint, gfloat, glong, gulong and gchar have all
been replaced with int, unsigned int, float, long, unsigned long and char
respectively. When talking about pixel data; use of guchar has been
replaced with guint8, otherwise unsigned char can be used.
The glib types that we continue to use for portability are gboolean,
gint{8,16,32,64}, guint{8,16,32,64} and gsize.
The general intention is that Cogl should look palatable to the widest
range of C programmers including those outside the Gnome community so
- especially for the public API - we want to minimize the number of
foreign looking typedefs.
202 lines
7.6 KiB
C
202 lines
7.6 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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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-material-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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GLuint gl_handle,
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GLenum gl_target,
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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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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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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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int width,
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int height,
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CoglPixelFormat format,
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unsigned int rowstride,
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const guint8 *data);
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int (* 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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gboolean (* 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 (* ensure_mipmaps) (CoglTexture *tex);
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void (* ensure_non_quad_rendering) (CoglTexture *tex);
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void (* set_wrap_mode_parameter) (CoglTexture *tex,
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GLenum wrap_mode);
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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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};
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struct _CoglTexture
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{
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CoglHandleObject _parent;
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const CoglTextureVtable *vtable;
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};
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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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gboolean
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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_parameter (CoglHandle handle,
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GLenum wrap_mode);
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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_ensure_mipmaps (CoglHandle handle);
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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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gboolean
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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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CoglBitmap *dst_bmp,
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gboolean *copied_bitmap,
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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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#endif /* __COGL_TEXTURE_PRIVATE_H */
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