author | jakl.martin@cell-telecom.com |
Mon, 06 Dec 2010 18:07:30 +0100 | |
branch | NewGraphicsArchitecture |
changeset 218 | 99b3451c560e |
parent 0 | 5d03bc08d59c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: RenderQueue implementation |
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* |
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*/ |
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|
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|
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/*! |
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* \internal |
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* \file |
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* \brief RenderQueue implementation. |
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* |
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* Render queue holds |
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* meshes and sprites that are added to queue in rendering |
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* setup. After setup, queue is committed and contents are |
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* rendered. Queue grows dynamically, its initial size is |
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* defined in m3g_defs.h. |
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*/ |
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|
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#ifndef M3G_CORE_INCLUDE |
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# error included by m3g_core.c; do not compile separately. |
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#endif |
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#include "m3g_array.h" |
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/*---------------------------------------------------------------------- |
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* Private data structures |
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*--------------------------------------------------------------------*/ |
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/*! |
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* \internal |
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* \brief RenderQueue entry object |
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*/ |
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struct RenderItemImpl |
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{ |
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Node *node; |
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Matrix toCamera; |
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M3Gint subMeshIndex; |
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M3Guint sortKey; |
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}; |
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/*! |
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* \internal |
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* \brief Drawable queue |
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*/ |
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struct RenderBucketImpl |
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{ |
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PointerArray items; |
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}; |
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/* Sanity checking... */ |
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M3G_CT_ASSERT(M3G_RENDERQUEUE_BUCKET_BITS >= M3G_APPEARANCE_HARD_SORT_BITS); |
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/*---------------------------------------------------------------------- |
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* Private functions |
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*--------------------------------------------------------------------*/ |
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static M3G_INLINE RenderBucket *m3gGetRenderBucket(RenderQueue *rq, |
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M3Guint sortKey, |
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Interface *m3g) |
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{ |
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int i = (int)(sortKey >> (32 - M3G_RENDERQUEUE_BUCKET_BITS)); |
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RenderBucket *bucket = rq->buckets[i]; |
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if (!bucket) { |
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bucket = m3gAllocZ(m3g, sizeof(RenderBucket)); |
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/* array already initialized by zero-allocation; see m3g_array.h */ |
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rq->buckets[i] = bucket; |
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} |
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if (i < rq->minBucket) { |
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rq->minBucket = i; |
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} |
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if (i > rq->maxBucket) { |
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rq->maxBucket = i; |
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} |
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return bucket; |
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} |
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static void m3gDestroyRenderBucket(RenderBucket *bucket, Interface *m3g) |
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{ |
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if (bucket) { |
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int i; |
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PointerArray *items = &bucket->items; |
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for (i = 0; i < m3gArraySize(items); ++i) { |
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m3gFree(m3g, m3gGetArrayElement(items, i)); |
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} |
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m3gDestroyArray(items, m3g); |
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} |
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m3gFree(m3g, bucket); |
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} |
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107 |
|
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108 |
static RenderItem *m3gGetRenderItem(RenderQueue *rq, Interface *m3g) |
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109 |
{ |
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RenderItem *item = rq->freeItems; |
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111 |
if (!item) { |
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m3gIncStat(m3g, M3G_STAT_RENDERQUEUE_SIZE, 1); |
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item = m3gAlloc(m3g, sizeof(RenderItem)); |
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} |
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else { |
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M3G_VALIDATE_MEMBLOCK(item); |
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rq->freeItems = *(RenderItem**)item; /* move to next */ |
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} |
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return item; |
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} |
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121 |
|
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static void m3gRecycleRenderItem(RenderQueue *rq, RenderItem *item) |
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123 |
{ |
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if (item) { |
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*(RenderItem**)item = rq->freeItems; /* store "next" pointer */ |
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rq->freeItems = item; |
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} |
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} |
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129 |
|
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static M3Gbool m3gInsertRenderItem(RenderBucket *bucket, |
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RenderItem *item, |
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Interface *m3g) |
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133 |
{ |
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PointerArray *items = &bucket->items; |
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int idx = m3gArraySize(items); |
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136 |
|
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/* Do a binary search for the sorting key of the item */ |
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138 |
{ |
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M3Guint key = item->sortKey; |
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int low = 0; |
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int high = idx; |
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const RenderItem *cmp; |
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143 |
|
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idx >>= 1; |
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145 |
|
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while (low < high) { |
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cmp = (const RenderItem*) m3gGetArrayElement(items, idx); |
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148 |
|
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if (cmp->sortKey < key) { |
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low = idx + 1; |
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} |
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else if (cmp->sortKey > key) { |
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high = idx; |
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} |
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else { |
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break; |
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} |
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idx = (low + high) >> 1; |
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159 |
} |
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160 |
} |
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161 |
|
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/* Now that we know where to insert, insert; out of memory here |
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* returns < 0 */ |
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164 |
|
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return (m3gArrayInsert(items, idx, item, m3g) >= 0); |
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} |
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167 |
|
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168 |
|
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169 |
/*---------------------------------------------------------------------- |
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* Internal functions |
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*--------------------------------------------------------------------*/ |
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172 |
|
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173 |
/*! |
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* \internal |
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* \brief Creates a new render queue. |
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* |
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* \param m3g M3G interface object |
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* \return RenderQueue object |
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*/ |
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static RenderQueue *m3gCreateRenderQueue(Interface *m3g) |
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181 |
{ |
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RenderQueue *rq; |
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183 |
|
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rq = m3gAllocZ(m3g, (M3Gsizei) sizeof(RenderQueue)); |
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return rq; |
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} |
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187 |
|
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188 |
/*! |
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* \internal |
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* \brief Destroys a render queue and frees |
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* all allocated memory. |
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192 |
* |
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* \param m3g M3G interface object |
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* \param rq RenderQueue |
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195 |
*/ |
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196 |
static void m3gDestroyRenderQueue(Interface *m3g, RenderQueue *rq) |
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197 |
{ |
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if (rq) { |
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199 |
int i; |
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for (i = 0; i < (1 << M3G_RENDERQUEUE_BUCKET_BITS); ++i) { |
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201 |
RenderBucket *bucket = rq->buckets[i]; |
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m3gDestroyRenderBucket(bucket, m3g); |
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203 |
} |
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204 |
while (rq->freeItems) { |
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RenderItem *item = rq->freeItems; |
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rq->freeItems = *(RenderItem**)item; |
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207 |
m3gFree(m3g, item); |
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208 |
} |
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209 |
} |
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210 |
m3gFree(m3g, rq); |
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} |
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|
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/*! |
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* \internal |
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* \brief Inserts a mesh to the queue. May allocate |
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* memory if queue size is exceeded. |
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* |
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* \param m3g M3G interface object |
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* \param rq RenderQueue |
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* \param mesh Mesh object |
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* \param subMeshIndex submesh index inside mesh |
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* \param sortKey sorting key |
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*/ |
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static M3Gbool m3gInsertDrawable(Interface *m3g, |
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RenderQueue *rq, |
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Node *node, |
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const Matrix *toCamera, |
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M3Gint subMeshIndex, |
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M3Guint sortKey) |
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{ |
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RenderItem *item; |
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RenderBucket *bucket; |
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|
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item = m3gGetRenderItem(rq, m3g); |
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if (!item) { |
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goto OutOfMemory; |
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} |
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|
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bucket = m3gGetRenderBucket(rq, sortKey, m3g); |
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if (!bucket) { |
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goto OutOfMemory; |
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} |
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|
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item->node = node; |
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item->toCamera = *toCamera; |
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item->subMeshIndex = subMeshIndex; |
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item->sortKey = (sortKey << M3G_RENDERQUEUE_BUCKET_BITS); |
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|
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M3G_BEGIN_PROFILE(m3g, M3G_PROFILE_SETUP_SORT); |
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if (!m3gInsertRenderItem(bucket, item, m3g)) { |
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goto OutOfMemory; |
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} |
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M3G_END_PROFILE(m3g, M3G_PROFILE_SETUP_SORT); |
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return M3G_TRUE; |
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|
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OutOfMemory: |
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m3gRecycleRenderItem(rq, item); |
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return M3G_FALSE; |
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} |
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|
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/*! |
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* \internal |
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* \brief Clears the queue. |
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* |
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* \param rq RenderQueue |
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*/ |
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static void m3gClearRenderQueue(RenderQueue *rq) |
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{ |
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rq->root = NULL; |
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rq->lightManager = NULL; |
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rq->minBucket = (1 << M3G_RENDERQUEUE_BUCKET_BITS); |
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rq->maxBucket = 0; |
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} |
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|
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/*! |
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* \internal |
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* \brief Commits the queue by rendering its contents. |
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* |
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* \param rq RenderQueue |
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* \param ctx RenderContext object |
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*/ |
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static void m3gCommit(RenderQueue *rq, RenderContext *ctx) |
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{ |
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M3Gint b; |
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|
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for (b = rq->minBucket; b <= rq->maxBucket; ++b) { |
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if (rq->buckets[b]) { |
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PointerArray *items = &rq->buckets[b]->items; |
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int n = m3gArraySize(items); |
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int i; |
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for (i = 0; i < n; ++i) { |
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RenderItem *item = (RenderItem*) m3gGetArrayElement(items, i); |
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M3G_VFUNC(Node, item->node, doRender)( |
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item->node, ctx, &item->toCamera, item->subMeshIndex); |
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m3gRecycleRenderItem(rq, item); |
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} |
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m3gClearArray(items); |
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m3gIncStat(M3G_INTERFACE(ctx), M3G_STAT_RENDER_NODES_DRAWN, n); |
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} |
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} |
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} |
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302 |