54735dec84
The coding style has for a long time said to avoid using redundant glib
data types such as gint or gchar etc because we feel that they make the
code look unnecessarily foreign to developers coming from outside of the
Gnome developer community.
Note: When we tried to find the historical rationale for the types we
just found that they were apparently only added for consistent syntax
highlighting which didn't seem that compelling.
Up until now we have been continuing to use some of the platform
specific type such as gint{8,16,32,64} and gsize but this patch switches
us over to using the standard c99 equivalents instead so we can further
ensure that our code looks familiar to the widest range of C developers
who might potentially contribute to Cogl.
So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this
switches all Cogl code to instead use the int{8,16,32,64}_t and
uint{8,16,32,64}_t c99 types instead.
Instead of gsize we now use size_t
For now we are not going to use the c99 _Bool type and instead we have
introduced a new CoglBool type to use instead of gboolean.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
452 lines
14 KiB
C
452 lines
14 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) 2009,2010,2011 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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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-internal.h"
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#include "cogl-util.h"
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#include "cogl-texture-private.h"
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#include "cogl-sub-texture-private.h"
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#include "cogl-sub-texture.h"
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#include "cogl-context-private.h"
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#include "cogl-object.h"
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#include "cogl-texture-driver.h"
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#include "cogl-texture-rectangle-private.h"
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#include "cogl-texture-2d.h"
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#include <string.h>
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#include <math.h>
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static void _cogl_sub_texture_free (CoglSubTexture *sub_tex);
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COGL_TEXTURE_DEFINE (SubTexture, sub_texture);
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static const CoglTextureVtable cogl_sub_texture_vtable;
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static void
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_cogl_sub_texture_unmap_quad (CoglSubTexture *sub_tex,
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float *coords)
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{
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/* NB: coords[] come in as non-normalized if sub_tex->full_texture
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* is a CoglTextureRectangle otherwhise they are normalized. The
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* coordinates we write out though must always be normalized.
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*
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* NB: sub_tex->sub_x/y/width/height are in non-normalized
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* coordinates.
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*/
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if (cogl_is_texture_rectangle (sub_tex->full_texture))
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{
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coords[0] = (coords[0] - sub_tex->sub_x) / sub_tex->sub_width;
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coords[1] = (coords[1] - sub_tex->sub_y) / sub_tex->sub_height;
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coords[2] = (coords[2] - sub_tex->sub_x) / sub_tex->sub_width;
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coords[3] = (coords[3] - sub_tex->sub_y) / sub_tex->sub_height;
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}
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else
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{
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float width = cogl_texture_get_width (sub_tex->full_texture);
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float height = cogl_texture_get_height (sub_tex->full_texture);
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coords[0] = (coords[0] * width - sub_tex->sub_x) / sub_tex->sub_width;
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coords[1] = (coords[1] * height - sub_tex->sub_y) / sub_tex->sub_height;
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coords[2] = (coords[2] * width - sub_tex->sub_x) / sub_tex->sub_width;
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coords[3] = (coords[3] * height - sub_tex->sub_y) / sub_tex->sub_height;
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}
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}
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static void
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_cogl_sub_texture_map_quad (CoglSubTexture *sub_tex,
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float *coords)
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{
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/* NB: coords[] always come in as normalized coordinates but may go
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* out as non-normalized if sub_tex->full_texture is a
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* CoglTextureRectangle.
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*
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* NB: sub_tex->sub_x/y/width/height are in non-normalized
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* coordinates.
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*/
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if (cogl_is_texture_rectangle (sub_tex->full_texture))
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{
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coords[0] = coords[0] * sub_tex->sub_width + sub_tex->sub_x;
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coords[1] = coords[1] * sub_tex->sub_height + sub_tex->sub_y;
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coords[2] = coords[2] * sub_tex->sub_width + sub_tex->sub_x;
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coords[3] = coords[3] * sub_tex->sub_height + sub_tex->sub_y;
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}
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else
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{
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float width = cogl_texture_get_width (sub_tex->full_texture);
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float height = cogl_texture_get_height (sub_tex->full_texture);
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coords[0] = (coords[0] * sub_tex->sub_width + sub_tex->sub_x) / width;
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coords[1] = (coords[1] * sub_tex->sub_height + sub_tex->sub_y) / height;
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coords[2] = (coords[2] * sub_tex->sub_width + sub_tex->sub_x) / width;
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coords[3] = (coords[3] * sub_tex->sub_height + sub_tex->sub_y) / height;
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}
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}
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typedef struct _CoglSubTextureForeachData
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{
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CoglSubTexture *sub_tex;
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CoglMetaTextureCallback callback;
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void *user_data;
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} CoglSubTextureForeachData;
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static void
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unmap_coords_cb (CoglTexture *slice_texture,
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const float *slice_texture_coords,
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const float *meta_coords,
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void *user_data)
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{
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CoglSubTextureForeachData *data = user_data;
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float unmapped_coords[4];
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memcpy (unmapped_coords, meta_coords, sizeof (unmapped_coords));
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_cogl_sub_texture_unmap_quad (data->sub_tex, unmapped_coords);
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data->callback (slice_texture,
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slice_texture_coords,
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unmapped_coords,
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data->user_data);
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}
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static void
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_cogl_sub_texture_foreach_sub_texture_in_region (
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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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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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CoglTexture *full_texture = sub_tex->full_texture;
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float mapped_coords[4] =
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{ virtual_tx_1, virtual_ty_1, virtual_tx_2, virtual_ty_2};
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float virtual_coords[4] =
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{ virtual_tx_1, virtual_ty_1, virtual_tx_2, virtual_ty_2};
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/* map the virtual coordinates to ->full_texture coordinates */
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_cogl_sub_texture_map_quad (sub_tex, mapped_coords);
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/* TODO: Add something like cogl_is_low_level_texture() */
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if (cogl_is_texture_2d (full_texture) ||
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cogl_is_texture_rectangle (full_texture))
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{
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callback (sub_tex->full_texture,
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mapped_coords,
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virtual_coords,
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user_data);
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}
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else
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{
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CoglSubTextureForeachData data;
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data.sub_tex = sub_tex;
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data.callback = callback;
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data.user_data = user_data;
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cogl_meta_texture_foreach_in_region (COGL_META_TEXTURE (full_texture),
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mapped_coords[0],
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mapped_coords[1],
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mapped_coords[2],
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mapped_coords[3],
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COGL_PIPELINE_WRAP_MODE_REPEAT,
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COGL_PIPELINE_WRAP_MODE_REPEAT,
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unmap_coords_cb,
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&data);
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}
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}
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static void
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_cogl_sub_texture_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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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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_cogl_texture_set_wrap_mode_parameters (sub_tex->full_texture,
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wrap_mode_s,
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wrap_mode_t,
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wrap_mode_p);
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}
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static void
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_cogl_sub_texture_free (CoglSubTexture *sub_tex)
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{
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cogl_object_unref (sub_tex->next_texture);
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cogl_object_unref (sub_tex->full_texture);
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/* Chain up */
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_cogl_texture_free (COGL_TEXTURE (sub_tex));
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}
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CoglSubTexture *
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cogl_sub_texture_new (CoglContext *ctx,
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CoglTexture *next_texture,
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int sub_x, int sub_y,
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int sub_width, int sub_height)
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{
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CoglTexture *full_texture;
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CoglSubTexture *sub_tex;
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CoglTexture *tex;
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unsigned int next_width, next_height;
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next_width = cogl_texture_get_width (next_texture);
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next_height = cogl_texture_get_height (next_texture);
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/* The region must specify a non-zero subset of the full texture */
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_COGL_RETURN_VAL_IF_FAIL (sub_x >= 0 && sub_y >= 0, NULL);
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_COGL_RETURN_VAL_IF_FAIL (sub_width > 0 && sub_height > 0, NULL);
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_COGL_RETURN_VAL_IF_FAIL (sub_x + sub_width <= next_width, NULL);
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_COGL_RETURN_VAL_IF_FAIL (sub_y + sub_height <= next_height, NULL);
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sub_tex = g_new (CoglSubTexture, 1);
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tex = COGL_TEXTURE (sub_tex);
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_cogl_texture_init (tex, &cogl_sub_texture_vtable);
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/* If the next texture is also a sub texture we can avoid one level
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of indirection by referencing the full texture of that texture
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instead. */
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if (cogl_is_sub_texture (next_texture))
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{
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CoglSubTexture *other_sub_tex = COGL_SUB_TEXTURE (next_texture);
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full_texture = other_sub_tex->full_texture;
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sub_x += other_sub_tex->sub_x;
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sub_y += other_sub_tex->sub_y;
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}
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else
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full_texture = next_texture;
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sub_tex->next_texture = cogl_object_ref (next_texture);
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sub_tex->full_texture = cogl_object_ref (full_texture);
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sub_tex->sub_x = sub_x;
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sub_tex->sub_y = sub_y;
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sub_tex->sub_width = sub_width;
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sub_tex->sub_height = sub_height;
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return _cogl_sub_texture_object_new (sub_tex);
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}
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CoglTexture *
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cogl_sub_texture_get_parent (CoglSubTexture *sub_texture)
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{
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return sub_texture->next_texture;
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}
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static int
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_cogl_sub_texture_get_max_waste (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return cogl_texture_get_max_waste (sub_tex->full_texture);
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}
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static CoglBool
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_cogl_sub_texture_is_sliced (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return cogl_texture_is_sliced (sub_tex->full_texture);
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}
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static CoglBool
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_cogl_sub_texture_can_hardware_repeat (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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/* We can hardware repeat if the subtexture actually represents all of the
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of the full texture */
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return (sub_tex->sub_width ==
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cogl_texture_get_width (sub_tex->full_texture) &&
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sub_tex->sub_height ==
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cogl_texture_get_height (sub_tex->full_texture) &&
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_cogl_texture_can_hardware_repeat (sub_tex->full_texture));
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}
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static void
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_cogl_sub_texture_transform_coords_to_gl (CoglTexture *tex,
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float *s,
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float *t)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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/* This won't work if the sub texture is not the size of the full
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texture and the coordinates are outside the range [0,1] */
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*s = ((*s * sub_tex->sub_width + sub_tex->sub_x) /
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cogl_texture_get_width (sub_tex->full_texture));
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*t = ((*t * sub_tex->sub_height + sub_tex->sub_y) /
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cogl_texture_get_height (sub_tex->full_texture));
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_cogl_texture_transform_coords_to_gl (sub_tex->full_texture, s, t);
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}
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static CoglTransformResult
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_cogl_sub_texture_transform_quad_coords_to_gl (CoglTexture *tex,
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float *coords)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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int i;
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/* We can't support repeating with this method. In this case
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cogl-primitives will resort to manual repeating */
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for (i = 0; i < 4; i++)
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if (coords[i] < 0.0f || coords[i] > 1.0f)
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return COGL_TRANSFORM_SOFTWARE_REPEAT;
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_cogl_sub_texture_map_quad (sub_tex, coords);
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return _cogl_texture_transform_quad_coords_to_gl (sub_tex->full_texture,
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coords);
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}
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static CoglBool
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_cogl_sub_texture_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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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return cogl_texture_get_gl_texture (sub_tex->full_texture,
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out_gl_handle,
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out_gl_target);
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}
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static void
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_cogl_sub_texture_set_filters (CoglTexture *tex,
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GLenum min_filter,
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GLenum mag_filter)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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_cogl_texture_set_filters (sub_tex->full_texture, min_filter, mag_filter);
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}
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static void
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_cogl_sub_texture_pre_paint (CoglTexture *tex,
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CoglTexturePrePaintFlags flags)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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_cogl_texture_pre_paint (sub_tex->full_texture, flags);
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}
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static void
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_cogl_sub_texture_ensure_non_quad_rendering (CoglTexture *tex)
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{
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}
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static CoglBool
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_cogl_sub_texture_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 *bmp)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return cogl_texture_set_region_from_bitmap (sub_tex->full_texture,
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src_x, src_y,
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dst_x + sub_tex->sub_x,
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dst_y + sub_tex->sub_y,
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dst_width, dst_height,
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bmp);
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}
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static CoglPixelFormat
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_cogl_sub_texture_get_format (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return cogl_texture_get_format (sub_tex->full_texture);
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}
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static GLenum
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_cogl_sub_texture_get_gl_format (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return _cogl_texture_get_gl_format (sub_tex->full_texture);
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}
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static int
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_cogl_sub_texture_get_width (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return sub_tex->sub_width;
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}
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static int
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_cogl_sub_texture_get_height (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return sub_tex->sub_height;
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}
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static CoglTextureType
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_cogl_sub_texture_get_type (CoglTexture *tex)
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{
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CoglSubTexture *sub_tex = COGL_SUB_TEXTURE (tex);
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return _cogl_texture_get_type (sub_tex->full_texture);
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}
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static const CoglTextureVtable
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cogl_sub_texture_vtable =
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{
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FALSE, /* not primitive */
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_cogl_sub_texture_set_region,
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NULL, /* get_data */
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_cogl_sub_texture_foreach_sub_texture_in_region,
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_cogl_sub_texture_get_max_waste,
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_cogl_sub_texture_is_sliced,
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_cogl_sub_texture_can_hardware_repeat,
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_cogl_sub_texture_transform_coords_to_gl,
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_cogl_sub_texture_transform_quad_coords_to_gl,
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_cogl_sub_texture_get_gl_texture,
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_cogl_sub_texture_set_filters,
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_cogl_sub_texture_pre_paint,
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_cogl_sub_texture_ensure_non_quad_rendering,
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_cogl_sub_texture_set_wrap_mode_parameters,
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_cogl_sub_texture_get_format,
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_cogl_sub_texture_get_gl_format,
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_cogl_sub_texture_get_width,
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_cogl_sub_texture_get_height,
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_cogl_sub_texture_get_type,
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NULL, /* is_foreign */
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NULL /* set_auto_mipmap */
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};
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