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cda29a8011
* cogl_texture_get_data() is converted to use _cogl_texture_foreach_sub_texture_in_region() to iterate through the underlying textures. * When we need to read only a portion of the underlying texture, we set up a FBO and use _cogl_read_pixels() to read the portion we need. This is enormously more efficient for reading a small portion of a large atlas texture. * The CoglAtlasTexture, CoglSubTexture, and CoglTexture2dSliced implementation of get_texture() are removed. http://bugzilla.clutter-project.org/show_bug.cgi?id=2414
638 lines
23 KiB
C
638 lines
23 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 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.h"
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#include "cogl-debug.h"
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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-atlas-texture-private.h"
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#include "cogl-texture-2d-private.h"
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#include "cogl-sub-texture-private.h"
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#include "cogl-context.h"
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#include "cogl-handle.h"
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#include "cogl-texture-driver.h"
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#include "cogl-rectangle-map.h"
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#include "cogl-journal-private.h"
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#include "cogl-pipeline-opengl-private.h"
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#include "cogl-atlas.h"
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#include <stdlib.h>
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static void _cogl_atlas_texture_free (CoglAtlasTexture *sub_tex);
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COGL_TEXTURE_INTERNAL_DEFINE (AtlasTexture, atlas_texture);
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static const CoglTextureVtable cogl_atlas_texture_vtable;
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static CoglHandle
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_cogl_atlas_texture_create_sub_texture (CoglHandle full_texture,
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const CoglRectangleMapEntry *rectangle)
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{
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/* Create a subtexture for the given rectangle not including the
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1-pixel border */
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return _cogl_sub_texture_new (full_texture,
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rectangle->x + 1,
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rectangle->y + 1,
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rectangle->width - 2,
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rectangle->height - 2);
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}
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static void
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_cogl_atlas_texture_update_position_cb (gpointer user_data,
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CoglHandle new_texture,
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const CoglRectangleMapEntry *rectangle)
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{
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CoglAtlasTexture *atlas_tex = user_data;
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/* Update the sub texture */
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if (atlas_tex->sub_texture)
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cogl_handle_unref (atlas_tex->sub_texture);
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atlas_tex->sub_texture =
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_cogl_atlas_texture_create_sub_texture (new_texture, rectangle);
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/* Update the position */
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atlas_tex->rectangle = *rectangle;
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}
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static void
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_cogl_atlas_texture_reorganize_foreach_cb (const CoglRectangleMapEntry *entry,
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void *rectangle_data,
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void *user_data)
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{
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/* Notify cogl-pipeline.c that the texture's underlying GL texture
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* storage is changing so it knows it may need to bind a new texture
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* if the CoglTexture is reused with the same texture unit. */
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_cogl_pipeline_texture_storage_change_notify (rectangle_data);
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}
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static void
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_cogl_atlas_texture_reorganize_cb (void *data)
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{
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CoglAtlas *atlas;
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/* We don't know if any pipelines may currently be referenced in
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* the journal that depend on the current underlying GL texture
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* storage so we flush the journal before migrating.
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*
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* We are assuming that texture atlas migration never happens
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* during a flush so we don't have to consider recursion here.
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*/
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_cogl_journal_flush ();
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atlas = _cogl_atlas_texture_get_atlas ();
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if (atlas->map)
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_cogl_rectangle_map_foreach (atlas->map,
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_cogl_atlas_texture_reorganize_foreach_cb,
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NULL);
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}
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CoglAtlas *
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_cogl_atlas_texture_get_atlas (void)
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{
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_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
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if (ctx->atlas == COGL_INVALID_HANDLE)
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{
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ctx->atlas = _cogl_atlas_new (COGL_PIXEL_FORMAT_RGBA_8888,
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0,
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_cogl_atlas_texture_update_position_cb);
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_cogl_atlas_add_reorganize_callback (ctx->atlas,
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_cogl_atlas_texture_reorganize_cb,
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NULL);
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}
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return ctx->atlas;
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}
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static void
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_cogl_atlas_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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CoglTextureSliceCallback callback,
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void *user_data)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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_cogl_texture_foreach_sub_texture_in_region (atlas_tex->sub_texture,
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virtual_tx_1,
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virtual_ty_1,
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virtual_tx_2,
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virtual_ty_2,
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callback,
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user_data);
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}
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static void
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_cogl_atlas_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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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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_cogl_texture_set_wrap_mode_parameters (atlas_tex->sub_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_atlas_texture_remove_from_atlas (CoglAtlasTexture *atlas_tex)
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{
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if (atlas_tex->in_atlas)
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{
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_cogl_atlas_remove (_cogl_atlas_texture_get_atlas (),
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&atlas_tex->rectangle);
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atlas_tex->in_atlas = FALSE;
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}
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}
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static void
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_cogl_atlas_texture_free (CoglAtlasTexture *atlas_tex)
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{
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_cogl_atlas_texture_remove_from_atlas (atlas_tex);
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cogl_handle_unref (atlas_tex->sub_texture);
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/* Chain up */
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_cogl_texture_free (COGL_TEXTURE (atlas_tex));
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}
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static int
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_cogl_atlas_texture_get_max_waste (CoglTexture *tex)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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return cogl_texture_get_max_waste (atlas_tex->sub_texture);
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}
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static gboolean
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_cogl_atlas_texture_is_sliced (CoglTexture *tex)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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return cogl_texture_is_sliced (atlas_tex->sub_texture);
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}
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static gboolean
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_cogl_atlas_texture_can_hardware_repeat (CoglTexture *tex)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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return _cogl_texture_can_hardware_repeat (atlas_tex->sub_texture);
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}
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static void
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_cogl_atlas_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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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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_cogl_texture_transform_coords_to_gl (atlas_tex->sub_texture, s, t);
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}
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static CoglTransformResult
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_cogl_atlas_texture_transform_quad_coords_to_gl (CoglTexture *tex,
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float *coords)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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return _cogl_texture_transform_quad_coords_to_gl (atlas_tex->sub_texture,
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coords);
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}
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static gboolean
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_cogl_atlas_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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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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return cogl_texture_get_gl_texture (atlas_tex->sub_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_atlas_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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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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_cogl_texture_set_filters (atlas_tex->sub_texture, min_filter, mag_filter);
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}
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static void
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_cogl_atlas_texture_migrate_out_of_atlas (CoglAtlasTexture *atlas_tex)
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{
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/* Make sure this texture is not in the atlas */
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if (atlas_tex->in_atlas)
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{
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COGL_NOTE (ATLAS, "Migrating texture out of the atlas");
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/* We don't know if any pipelines may currently be referenced in
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* the journal that depend on the current underlying GL texture
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* storage so we flush the journal before migrating.
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*
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* We are assuming that texture atlas migration never happens
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* during a flush so we don't have to consider recursion here.
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*/
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_cogl_journal_flush ();
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/* Notify cogl-pipeline.c that the texture's underlying GL texture
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* storage is changing so it knows it may need to bind a new texture
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* if the CoglTexture is reused with the same texture unit. */
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_cogl_pipeline_texture_storage_change_notify (atlas_tex);
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cogl_handle_unref (atlas_tex->sub_texture);
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atlas_tex->sub_texture =
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_cogl_atlas_copy_rectangle (_cogl_atlas_texture_get_atlas (),
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atlas_tex->rectangle.x + 1,
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atlas_tex->rectangle.y + 1,
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atlas_tex->rectangle.width - 2,
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atlas_tex->rectangle.height - 2,
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COGL_TEXTURE_NO_ATLAS,
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atlas_tex->format);
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_cogl_atlas_texture_remove_from_atlas (atlas_tex);
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}
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}
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static void
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_cogl_atlas_texture_pre_paint (CoglTexture *tex, CoglTexturePrePaintFlags flags)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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if ((flags & COGL_TEXTURE_NEEDS_MIPMAP))
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/* Mipmaps do not work well with the current atlas so instead
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we'll just migrate the texture out and use a regular texture */
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_cogl_atlas_texture_migrate_out_of_atlas (atlas_tex);
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/* Forward on to the sub texture */
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_cogl_texture_pre_paint (atlas_tex->sub_texture, flags);
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}
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static void
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_cogl_atlas_texture_ensure_non_quad_rendering (CoglTexture *tex)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Sub textures can't support non-quad rendering so we'll just
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migrate the texture out */
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_cogl_atlas_texture_migrate_out_of_atlas (atlas_tex);
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/* Forward on to the sub texture */
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_cogl_texture_ensure_non_quad_rendering (atlas_tex->sub_texture);
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}
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static gboolean
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_cogl_atlas_texture_set_region_with_border (CoglAtlasTexture *atlas_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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CoglAtlas *atlas = _cogl_atlas_texture_get_atlas ();
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/* Copy the central data */
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if (!_cogl_texture_set_region_from_bitmap (atlas->texture,
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src_x, src_y,
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dst_x + atlas_tex->rectangle.x + 1,
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dst_y + atlas_tex->rectangle.y + 1,
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dst_width,
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dst_height,
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bmp))
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return FALSE;
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/* Update the left edge pixels */
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if (dst_x == 0 &&
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!_cogl_texture_set_region_from_bitmap (atlas->texture,
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src_x, src_y,
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atlas_tex->rectangle.x,
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dst_y + atlas_tex->rectangle.y + 1,
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1, dst_height,
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bmp))
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return FALSE;
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/* Update the right edge pixels */
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if (dst_x + dst_width == atlas_tex->rectangle.width - 2 &&
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!_cogl_texture_set_region_from_bitmap (atlas->texture,
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src_x + dst_width - 1, src_y,
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atlas_tex->rectangle.x +
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atlas_tex->rectangle.width - 1,
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dst_y + atlas_tex->rectangle.y + 1,
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1, dst_height,
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bmp))
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return FALSE;
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/* Update the top edge pixels */
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if (dst_y == 0 &&
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!_cogl_texture_set_region_from_bitmap (atlas->texture,
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src_x, src_y,
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dst_x + atlas_tex->rectangle.x + 1,
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atlas_tex->rectangle.y,
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dst_width, 1,
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bmp))
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return FALSE;
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/* Update the bottom edge pixels */
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if (dst_y + dst_height == atlas_tex->rectangle.height - 2 &&
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!_cogl_texture_set_region_from_bitmap (atlas->texture,
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src_x, src_y + dst_height - 1,
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dst_x + atlas_tex->rectangle.x + 1,
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atlas_tex->rectangle.y +
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atlas_tex->rectangle.height - 1,
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dst_width, 1,
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bmp))
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return FALSE;
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return TRUE;
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}
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static gboolean
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_cogl_atlas_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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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* If the texture is in the atlas then we need to copy the edge
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pixels to the border */
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if (atlas_tex->in_atlas)
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{
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gboolean ret;
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bmp = _cogl_bitmap_new_shared (bmp,
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_cogl_bitmap_get_format (bmp) &
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~COGL_PREMULT_BIT,
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_cogl_bitmap_get_width (bmp),
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_cogl_bitmap_get_height (bmp),
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_cogl_bitmap_get_rowstride (bmp));
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/* Upload the data ignoring the premult bit */
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ret = _cogl_atlas_texture_set_region_with_border (atlas_tex,
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src_x, src_y,
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dst_x, dst_y,
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dst_width, dst_height,
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bmp);
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cogl_object_unref (bmp);
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return ret;
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}
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else
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/* Otherwise we can just forward on to the sub texture */
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return _cogl_texture_set_region_from_bitmap (atlas_tex->sub_texture,
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src_x, src_y,
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dst_x, dst_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_atlas_texture_get_format (CoglTexture *tex)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* We don't want to forward this on the sub-texture because it isn't
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the necessarily the same format. This will happen if the texture
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isn't pre-multiplied */
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return atlas_tex->format;
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}
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static GLenum
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_cogl_atlas_texture_get_gl_format (CoglTexture *tex)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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return _cogl_texture_get_gl_format (atlas_tex->sub_texture);
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}
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static int
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_cogl_atlas_texture_get_width (CoglTexture *tex)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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return cogl_texture_get_width (atlas_tex->sub_texture);
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}
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static int
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_cogl_atlas_texture_get_height (CoglTexture *tex)
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{
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CoglAtlasTexture *atlas_tex = COGL_ATLAS_TEXTURE (tex);
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/* Forward on to the sub texture */
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return cogl_texture_get_height (atlas_tex->sub_texture);
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}
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static gboolean
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_cogl_atlas_texture_can_use_format (CoglPixelFormat format)
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{
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/* We don't care about the ordering or the premult status and we can
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accept RGBA or RGB textures. Although we could also accept
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luminance and alpha only textures or 16-bit formats it seems that
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if the application is explicitly using these formats then they've
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got a reason to want the lower memory requirements so putting
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them in the atlas might not be a good idea */
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format &= ~(COGL_PREMULT_BIT | COGL_BGR_BIT | COGL_AFIRST_BIT);
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return (format == COGL_PIXEL_FORMAT_RGB_888 ||
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format == COGL_PIXEL_FORMAT_RGBA_8888);
|
|
}
|
|
|
|
CoglHandle
|
|
_cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
|
|
CoglTextureFlags flags,
|
|
CoglPixelFormat internal_format)
|
|
{
|
|
CoglAtlasTexture *atlas_tex;
|
|
CoglBitmap *dst_bmp;
|
|
CoglBitmap *override_bmp;
|
|
GLenum gl_intformat;
|
|
GLenum gl_format;
|
|
GLenum gl_type;
|
|
int bmp_width;
|
|
int bmp_height;
|
|
CoglPixelFormat bmp_format;
|
|
|
|
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
|
|
|
|
g_return_val_if_fail (cogl_is_bitmap (bmp), COGL_INVALID_HANDLE);
|
|
|
|
/* Don't put textures in the atlas if the user has explicitly
|
|
requested to disable it */
|
|
if (G_UNLIKELY (cogl_debug_flags & COGL_DEBUG_DISABLE_ATLAS))
|
|
return COGL_INVALID_HANDLE;
|
|
|
|
/* We can't put the texture in the atlas if there are any special
|
|
flags. This precludes textures with COGL_TEXTURE_NO_ATLAS and
|
|
COGL_TEXTURE_NO_SLICING from being atlased */
|
|
if (flags)
|
|
return COGL_INVALID_HANDLE;
|
|
|
|
bmp_width = _cogl_bitmap_get_width (bmp);
|
|
bmp_height = _cogl_bitmap_get_height (bmp);
|
|
bmp_format = _cogl_bitmap_get_format (bmp);
|
|
|
|
/* We can't atlas zero-sized textures because it breaks the atlas
|
|
data structure */
|
|
if (bmp_width < 1 || bmp_height < 1)
|
|
return COGL_INVALID_HANDLE;
|
|
|
|
/* If we can't use FBOs or we can't read back texture data then it
|
|
will be too slow to migrate textures and we shouldn't use the
|
|
atlas */
|
|
if (!cogl_features_available (COGL_FEATURE_TEXTURE_READ_PIXELS) ||
|
|
!cogl_features_available (COGL_FEATURE_OFFSCREEN))
|
|
return COGL_INVALID_HANDLE;
|
|
|
|
COGL_NOTE (ATLAS, "Adding texture of size %ix%i", bmp_width, bmp_height);
|
|
|
|
internal_format = _cogl_texture_determine_internal_format (bmp_format,
|
|
internal_format);
|
|
|
|
/* If the texture is in a strange format then we won't use it */
|
|
if (!_cogl_atlas_texture_can_use_format (internal_format))
|
|
{
|
|
COGL_NOTE (ATLAS, "Texture can not be added because the "
|
|
"format is unsupported");
|
|
|
|
return COGL_INVALID_HANDLE;
|
|
}
|
|
|
|
/* We need to allocate the texture now because we need the pointer
|
|
to set as the data for the rectangle in the atlas */
|
|
atlas_tex = g_new (CoglAtlasTexture, 1);
|
|
|
|
atlas_tex->sub_texture = COGL_INVALID_HANDLE;
|
|
|
|
/* Try to make some space in the atlas for the texture */
|
|
if (!_cogl_atlas_reserve_space (_cogl_atlas_texture_get_atlas (),
|
|
/* Add two pixels for the border */
|
|
bmp_width + 2, bmp_height + 2,
|
|
atlas_tex))
|
|
{
|
|
g_free (atlas_tex);
|
|
return COGL_INVALID_HANDLE;
|
|
}
|
|
|
|
dst_bmp = _cogl_texture_prepare_for_upload (bmp,
|
|
internal_format,
|
|
&internal_format,
|
|
&gl_intformat,
|
|
&gl_format,
|
|
&gl_type);
|
|
|
|
if (dst_bmp == NULL)
|
|
{
|
|
_cogl_atlas_remove (_cogl_atlas_texture_get_atlas (),
|
|
&atlas_tex->rectangle);
|
|
g_free (atlas_tex);
|
|
return COGL_INVALID_HANDLE;
|
|
}
|
|
|
|
atlas_tex->_parent.vtable = &cogl_atlas_texture_vtable;
|
|
atlas_tex->format = internal_format;
|
|
atlas_tex->in_atlas = TRUE;
|
|
|
|
/* Make another bitmap so that we can override the format */
|
|
override_bmp = _cogl_bitmap_new_shared (dst_bmp,
|
|
_cogl_bitmap_get_format (dst_bmp) &
|
|
~COGL_PREMULT_BIT,
|
|
_cogl_bitmap_get_width (dst_bmp),
|
|
_cogl_bitmap_get_height (dst_bmp),
|
|
_cogl_bitmap_get_rowstride (dst_bmp));
|
|
cogl_object_unref (dst_bmp);
|
|
|
|
/* Defer to set_region so that we can share the code for copying the
|
|
edge pixels to the border. We don't want to pass the actual
|
|
format of the converted texture because otherwise it will get
|
|
unpremultiplied. */
|
|
_cogl_atlas_texture_set_region_with_border (atlas_tex,
|
|
0, /* src_x */
|
|
0, /* src_y */
|
|
0, /* dst_x */
|
|
0, /* dst_y */
|
|
bmp_width, /* dst_width */
|
|
bmp_height, /* dst_height */
|
|
override_bmp);
|
|
|
|
cogl_object_unref (override_bmp);
|
|
|
|
return _cogl_atlas_texture_handle_new (atlas_tex);
|
|
}
|
|
|
|
static const CoglTextureVtable
|
|
cogl_atlas_texture_vtable =
|
|
{
|
|
_cogl_atlas_texture_set_region,
|
|
NULL, /* get_data */
|
|
_cogl_atlas_texture_foreach_sub_texture_in_region,
|
|
_cogl_atlas_texture_get_max_waste,
|
|
_cogl_atlas_texture_is_sliced,
|
|
_cogl_atlas_texture_can_hardware_repeat,
|
|
_cogl_atlas_texture_transform_coords_to_gl,
|
|
_cogl_atlas_texture_transform_quad_coords_to_gl,
|
|
_cogl_atlas_texture_get_gl_texture,
|
|
_cogl_atlas_texture_set_filters,
|
|
_cogl_atlas_texture_pre_paint,
|
|
_cogl_atlas_texture_ensure_non_quad_rendering,
|
|
_cogl_atlas_texture_set_wrap_mode_parameters,
|
|
_cogl_atlas_texture_get_format,
|
|
_cogl_atlas_texture_get_gl_format,
|
|
_cogl_atlas_texture_get_width,
|
|
_cogl_atlas_texture_get_height,
|
|
NULL /* is_foreign */
|
|
};
|