047227fbd7
_cogl_atlas_new now has two extra parameters to specify the format of the textures it creates as well as a set of flags to modify the behavious of the atlas. One of the flags causes the new textures to be cleared and the other causes migration to avoid actually copying the textures. This is needed to use CoglAtlas from the pango glyph cache because it needs to use COGL_PIXEL_A_8 and to clear the textures as it does not fill in the gaps between glyphs. It needs to avoid copying the textures so that it can work on GL implementations without FBO support.
653 lines
23 KiB
C
653 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-material-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-material.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_material_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 materials 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 materials 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-material.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_material_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 gboolean
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_cogl_atlas_texture_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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{
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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_data (atlas_tex->sub_texture,
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format,
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rowstride,
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data);
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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
|
|
if the application is explicitly using these formats then they've
|
|
got a reason to want the lower memory requirements so putting
|
|
them in the atlas might not be a good idea */
|
|
format &= ~(COGL_PREMULT_BIT | COGL_BGR_BIT | COGL_AFIRST_BIT);
|
|
return (format == COGL_PIXEL_FORMAT_RGB_888 ||
|
|
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,
|
|
_cogl_atlas_texture_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 */
|
|
};
|