Nicolas Capens | 0bac285 | 2016-05-07 06:09:58 -0400 | [diff] [blame] | 1 | // Copyright 2016 The SwiftShader Authors. All Rights Reserved. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | // VertexDataManager.h: Defines the VertexDataManager, a class that |
| 16 | // runs the Buffer translation process. |
| 17 | |
| 18 | #include "VertexDataManager.h" |
| 19 | |
| 20 | #include "Buffer.h" |
| 21 | #include "IndexDataManager.h" |
| 22 | #include "common/debug.h" |
| 23 | |
| 24 | #include <algorithm> |
| 25 | |
| 26 | namespace |
| 27 | { |
| 28 | enum {INITIAL_STREAM_BUFFER_SIZE = 1024 * 1024}; |
| 29 | } |
| 30 | |
| 31 | namespace es1 |
| 32 | { |
| 33 | |
| 34 | VertexDataManager::VertexDataManager(Context *context) : mContext(context) |
| 35 | { |
| 36 | for(int i = 0; i < MAX_VERTEX_ATTRIBS; i++) |
| 37 | { |
| 38 | mDirtyCurrentValue[i] = true; |
| 39 | mCurrentValueBuffer[i] = nullptr; |
| 40 | } |
| 41 | |
| 42 | mStreamingBuffer = new StreamingVertexBuffer(INITIAL_STREAM_BUFFER_SIZE); |
| 43 | |
| 44 | if(!mStreamingBuffer) |
| 45 | { |
| 46 | ERR("Failed to allocate the streaming vertex buffer."); |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | VertexDataManager::~VertexDataManager() |
| 51 | { |
| 52 | delete mStreamingBuffer; |
| 53 | |
| 54 | for(int i = 0; i < MAX_VERTEX_ATTRIBS; i++) |
| 55 | { |
| 56 | delete mCurrentValueBuffer[i]; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | unsigned int VertexDataManager::writeAttributeData(StreamingVertexBuffer *vertexBuffer, GLint start, GLsizei count, const VertexAttribute &attribute) |
| 61 | { |
| 62 | Buffer *buffer = attribute.mBoundBuffer; |
| 63 | |
| 64 | int inputStride = attribute.stride(); |
| 65 | int elementSize = attribute.typeSize(); |
| 66 | unsigned int streamOffset = 0; |
| 67 | |
| 68 | char *output = nullptr; |
| 69 | |
| 70 | if(vertexBuffer) |
| 71 | { |
| 72 | output = (char*)vertexBuffer->map(attribute, attribute.typeSize() * count, &streamOffset); |
| 73 | } |
| 74 | |
| 75 | if(!output) |
| 76 | { |
| 77 | ERR("Failed to map vertex buffer."); |
| 78 | return ~0u; |
| 79 | } |
| 80 | |
| 81 | const char *input = nullptr; |
| 82 | |
| 83 | if(buffer) |
| 84 | { |
| 85 | int offset = attribute.mOffset; |
| 86 | |
| 87 | input = static_cast<const char*>(buffer->data()) + offset; |
| 88 | } |
| 89 | else |
| 90 | { |
| 91 | input = static_cast<const char*>(attribute.mPointer); |
| 92 | } |
| 93 | |
| 94 | input += inputStride * start; |
| 95 | |
| 96 | if(inputStride == elementSize) |
| 97 | { |
| 98 | memcpy(output, input, count * inputStride); |
| 99 | } |
| 100 | else |
| 101 | { |
| 102 | for(int i = 0; i < count; i++) |
| 103 | { |
| 104 | memcpy(output, input, elementSize); |
| 105 | output += elementSize; |
| 106 | input += inputStride; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | vertexBuffer->unmap(); |
| 111 | |
| 112 | return streamOffset; |
| 113 | } |
| 114 | |
| 115 | GLenum VertexDataManager::prepareVertexData(GLint start, GLsizei count, TranslatedAttribute *translated) |
| 116 | { |
| 117 | if(!mStreamingBuffer) |
| 118 | { |
| 119 | return GL_OUT_OF_MEMORY; |
| 120 | } |
| 121 | |
| 122 | const VertexAttributeArray &attribs = mContext->getVertexAttributes(); |
| 123 | |
| 124 | // Determine the required storage size per used buffer |
| 125 | for(int i = 0; i < MAX_VERTEX_ATTRIBS; i++) |
| 126 | { |
| 127 | if(attribs[i].mArrayEnabled) |
| 128 | { |
| 129 | if(!attribs[i].mBoundBuffer) |
| 130 | { |
| 131 | mStreamingBuffer->addRequiredSpace(attribs[i].typeSize() * count); |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | mStreamingBuffer->reserveRequiredSpace(); |
| 137 | |
| 138 | // Perform the vertex data translations |
| 139 | for(int i = 0; i < MAX_VERTEX_ATTRIBS; i++) |
| 140 | { |
| 141 | if(attribs[i].mArrayEnabled) |
| 142 | { |
| 143 | Buffer *buffer = attribs[i].mBoundBuffer; |
| 144 | |
| 145 | if(!buffer && attribs[i].mPointer == nullptr) |
| 146 | { |
| 147 | // This is an application error that would normally result in a crash, but we catch it and return an error |
| 148 | ERR("An enabled vertex array has no buffer and no pointer."); |
| 149 | return GL_INVALID_OPERATION; |
| 150 | } |
| 151 | |
| 152 | sw::Resource *staticBuffer = buffer ? buffer->getResource() : nullptr; |
| 153 | |
| 154 | if(staticBuffer) |
| 155 | { |
| 156 | translated[i].vertexBuffer = staticBuffer; |
| 157 | translated[i].offset = start * attribs[i].stride() + attribs[i].mOffset; |
| 158 | translated[i].stride = attribs[i].stride(); |
| 159 | } |
| 160 | else |
| 161 | { |
| 162 | unsigned int streamOffset = writeAttributeData(mStreamingBuffer, start, count, attribs[i]); |
| 163 | |
| 164 | if(streamOffset == ~0u) |
| 165 | { |
| 166 | return GL_OUT_OF_MEMORY; |
| 167 | } |
| 168 | |
| 169 | translated[i].vertexBuffer = mStreamingBuffer->getResource(); |
| 170 | translated[i].offset = streamOffset; |
| 171 | translated[i].stride = attribs[i].typeSize(); |
| 172 | } |
| 173 | |
| 174 | switch(attribs[i].mType) |
| 175 | { |
| 176 | case GL_BYTE: translated[i].type = sw::STREAMTYPE_SBYTE; break; |
| 177 | case GL_UNSIGNED_BYTE: translated[i].type = sw::STREAMTYPE_BYTE; break; |
| 178 | case GL_SHORT: translated[i].type = sw::STREAMTYPE_SHORT; break; |
| 179 | case GL_UNSIGNED_SHORT: translated[i].type = sw::STREAMTYPE_USHORT; break; |
| 180 | case GL_INT: translated[i].type = sw::STREAMTYPE_INT; break; |
| 181 | case GL_UNSIGNED_INT: translated[i].type = sw::STREAMTYPE_UINT; break; |
| 182 | case GL_FIXED: translated[i].type = sw::STREAMTYPE_FIXED; break; |
| 183 | case GL_FLOAT: translated[i].type = sw::STREAMTYPE_FLOAT; break; |
| 184 | default: UNREACHABLE(attribs[i].mType); translated[i].type = sw::STREAMTYPE_FLOAT; break; |
| 185 | } |
| 186 | |
| 187 | translated[i].count = attribs[i].mSize; |
| 188 | translated[i].normalized = attribs[i].mNormalized; |
| 189 | } |
| 190 | else |
| 191 | { |
| 192 | if(mDirtyCurrentValue[i]) |
| 193 | { |
| 194 | delete mCurrentValueBuffer[i]; |
| 195 | mCurrentValueBuffer[i] = new ConstantVertexBuffer(attribs[i].mCurrentValue[0], attribs[i].mCurrentValue[1], attribs[i].mCurrentValue[2], attribs[i].mCurrentValue[3]); |
| 196 | mDirtyCurrentValue[i] = false; |
| 197 | } |
| 198 | |
| 199 | translated[i].vertexBuffer = mCurrentValueBuffer[i]->getResource(); |
| 200 | |
| 201 | translated[i].type = sw::STREAMTYPE_FLOAT; |
| 202 | translated[i].count = 4; |
| 203 | translated[i].stride = 0; |
| 204 | translated[i].offset = 0; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | return GL_NO_ERROR; |
| 209 | } |
| 210 | |
| 211 | VertexBuffer::VertexBuffer(unsigned int size) : mVertexBuffer(nullptr) |
| 212 | { |
| 213 | if(size > 0) |
| 214 | { |
| 215 | mVertexBuffer = new sw::Resource(size + 1024); |
| 216 | |
| 217 | if(!mVertexBuffer) |
| 218 | { |
| 219 | ERR("Out of memory allocating a vertex buffer of size %u.", size); |
| 220 | } |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | VertexBuffer::~VertexBuffer() |
| 225 | { |
| 226 | if(mVertexBuffer) |
| 227 | { |
| 228 | mVertexBuffer->destruct(); |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | void VertexBuffer::unmap() |
| 233 | { |
| 234 | if(mVertexBuffer) |
| 235 | { |
| 236 | mVertexBuffer->unlock(); |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | sw::Resource *VertexBuffer::getResource() const |
| 241 | { |
| 242 | return mVertexBuffer; |
| 243 | } |
| 244 | |
| 245 | ConstantVertexBuffer::ConstantVertexBuffer(float x, float y, float z, float w) : VertexBuffer(4 * sizeof(float)) |
| 246 | { |
| 247 | if(mVertexBuffer) |
| 248 | { |
| 249 | float *vector = (float*)mVertexBuffer->lock(sw::PUBLIC); |
| 250 | |
| 251 | vector[0] = x; |
| 252 | vector[1] = y; |
| 253 | vector[2] = z; |
| 254 | vector[3] = w; |
| 255 | |
| 256 | mVertexBuffer->unlock(); |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | ConstantVertexBuffer::~ConstantVertexBuffer() |
| 261 | { |
| 262 | } |
| 263 | |
| 264 | StreamingVertexBuffer::StreamingVertexBuffer(unsigned int size) : VertexBuffer(size) |
| 265 | { |
| 266 | mBufferSize = size; |
| 267 | mWritePosition = 0; |
| 268 | mRequiredSpace = 0; |
| 269 | } |
| 270 | |
| 271 | StreamingVertexBuffer::~StreamingVertexBuffer() |
| 272 | { |
| 273 | } |
| 274 | |
| 275 | void StreamingVertexBuffer::addRequiredSpace(unsigned int requiredSpace) |
| 276 | { |
| 277 | mRequiredSpace += requiredSpace; |
| 278 | } |
| 279 | |
| 280 | void *StreamingVertexBuffer::map(const VertexAttribute &attribute, unsigned int requiredSpace, unsigned int *offset) |
| 281 | { |
| 282 | void *mapPtr = nullptr; |
| 283 | |
| 284 | if(mVertexBuffer) |
| 285 | { |
| 286 | // We can use a private lock because we never overwrite the content |
| 287 | mapPtr = (char*)mVertexBuffer->lock(sw::PRIVATE) + mWritePosition; |
| 288 | |
| 289 | *offset = mWritePosition; |
| 290 | mWritePosition += requiredSpace; |
| 291 | } |
| 292 | |
| 293 | return mapPtr; |
| 294 | } |
| 295 | |
| 296 | void StreamingVertexBuffer::reserveRequiredSpace() |
| 297 | { |
| 298 | if(mRequiredSpace > mBufferSize) |
| 299 | { |
| 300 | if(mVertexBuffer) |
| 301 | { |
| 302 | mVertexBuffer->destruct(); |
| 303 | mVertexBuffer = 0; |
| 304 | } |
| 305 | |
| 306 | mBufferSize = std::max(mRequiredSpace, 3 * mBufferSize / 2); // 1.5 x mBufferSize is arbitrary and should be checked to see we don't have too many reallocations. |
| 307 | |
| 308 | mVertexBuffer = new sw::Resource(mBufferSize); |
| 309 | |
| 310 | if(!mVertexBuffer) |
| 311 | { |
| 312 | ERR("Out of memory allocating a vertex buffer of size %u.", mBufferSize); |
| 313 | } |
| 314 | |
| 315 | mWritePosition = 0; |
| 316 | } |
| 317 | else if(mWritePosition + mRequiredSpace > mBufferSize) // Recycle |
| 318 | { |
| 319 | if(mVertexBuffer) |
| 320 | { |
| 321 | mVertexBuffer->destruct(); |
| 322 | mVertexBuffer = new sw::Resource(mBufferSize); |
| 323 | } |
| 324 | |
| 325 | mWritePosition = 0; |
| 326 | } |
| 327 | |
| 328 | mRequiredSpace = 0; |
| 329 | } |
| 330 | |
| 331 | } |