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efadc439a4
Previously whenever the journal is flushed a new vertex array would be created to contain the vertices. To avoid the overhead of reallocating a buffer every time, this patch makes it use a pool of 8 buffers which are cycled in turn. The buffers are never destroyed but instead the data is replaced. The journal should only ever be using one buffer at a time but we cache more than one buffer anyway in case the GL driver is internally using the buffer in which case mapping the buffer may cause it to create a new buffer anyway.
106 lines
3.4 KiB
C
106 lines
3.4 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifndef __COGL_JOURNAL_PRIVATE_H
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#define __COGL_JOURNAL_PRIVATE_H
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#include "cogl.h"
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#include "cogl-handle.h"
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#include "cogl-clip-stack.h"
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#define COGL_JOURNAL_VBO_POOL_SIZE 8
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typedef struct _CoglJournal
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{
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CoglObject _parent;
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GArray *entries;
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GArray *vertices;
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size_t needed_vbo_len;
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/* A pool of attribute buffers is used so that we can avoid repeatedly
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reallocating buffers. Only one of these buffers at a time will be
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used by Cogl but we keep more than one alive anyway in case the
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GL driver is internally using the buffer and it would have to
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allocate a new one when we start writing to it */
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CoglAttributeBuffer *vbo_pool[COGL_JOURNAL_VBO_POOL_SIZE];
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/* The next vbo to use from the pool. We just cycle through them in
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order */
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unsigned int next_vbo_in_pool;
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int fast_read_pixel_count;
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} CoglJournal;
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/* To improve batching of geometry when submitting vertices to OpenGL we
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* log the texture rectangles we want to draw to a journal, so when we
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* later flush the journal we aim to batch data, and gl draw calls. */
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typedef struct _CoglJournalEntry
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{
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CoglPipeline *pipeline;
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int n_layers;
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CoglMatrix model_view;
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CoglClipStack *clip_stack;
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/* Offset into ctx->logged_vertices */
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size_t array_offset;
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/* XXX: These entries are pretty big now considering the padding in
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* CoglPipelineFlushOptions and CoglMatrix, so we might need to optimize this
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* later. */
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} CoglJournalEntry;
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CoglJournal *
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_cogl_journal_new (void);
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void
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_cogl_journal_log_quad (CoglJournal *journal,
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const float *position,
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CoglPipeline *pipeline,
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int n_layers,
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CoglHandle layer0_override_texture,
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const float *tex_coords,
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unsigned int tex_coords_len);
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void
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_cogl_journal_flush (CoglJournal *journal,
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CoglFramebuffer *framebuffer);
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void
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_cogl_journal_discard (CoglJournal *journal);
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gboolean
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_cogl_journal_all_entries_within_bounds (CoglJournal *journal,
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float clip_x0,
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float clip_y0,
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float clip_x1,
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float clip_y1);
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gboolean
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_cogl_journal_try_read_pixel (CoglJournal *journal,
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int x,
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int y,
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CoglPixelFormat format,
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guint8 *pixel,
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gboolean *found_intersection);
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#endif /* __COGL_JOURNAL_PRIVATE_H */
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