Home | History | Annotate | Download | only in libGLESv2 
      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 // TransformFeedback.cpp: Implements the es2::TransformFeedback class
     16 
     17 #include "TransformFeedback.h"
     18 
     19 namespace es2
     20 {
     21 
     22 TransformFeedback::TransformFeedback(GLuint name) : NamedObject(name), mActive(false), mPaused(false), mVertexOffset(0)
     23 {
     24 	mGenericBuffer = nullptr;
     25 }
     26 
     27 TransformFeedback::~TransformFeedback()
     28 {
     29 	mGenericBuffer = nullptr;
     30 	for(int i = 0; i < MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS; ++i)
     31 	{
     32 		mBuffer[i].set(nullptr);
     33 	}
     34 }
     35 
     36 Buffer* TransformFeedback::getGenericBuffer() const
     37 {
     38 	return mGenericBuffer;
     39 }
     40 
     41 Buffer* TransformFeedback::getBuffer(GLuint index) const
     42 {
     43 	return mBuffer[index].get();
     44 }
     45 
     46 GLuint TransformFeedback::getGenericBufferName() const
     47 {
     48 	return mGenericBuffer.name();
     49 }
     50 
     51 GLuint TransformFeedback::getBufferName(GLuint index) const
     52 {
     53 	return mBuffer[index].get().name();
     54 }
     55 
     56 int TransformFeedback::getOffset(GLuint index) const
     57 {
     58 	return mBuffer[index].getOffset();
     59 }
     60 
     61 int TransformFeedback::getSize(GLuint index) const
     62 {
     63 	return mBuffer[index].getSize();
     64 }
     65 
     66 void TransformFeedback::addVertexOffset(int count)
     67 {
     68 	if(isActive() && !isPaused())
     69 	{
     70 		mVertexOffset += count;
     71 	}
     72 }
     73 
     74 int TransformFeedback::vertexOffset() const
     75 {
     76 	return mVertexOffset;
     77 }
     78 
     79 bool TransformFeedback::isActive() const
     80 {
     81 	return mActive;
     82 }
     83 
     84 bool TransformFeedback::isPaused() const
     85 {
     86 	return mPaused;
     87 }
     88 
     89 GLenum TransformFeedback::primitiveMode() const
     90 {
     91 	return mPrimitiveMode;
     92 }
     93 
     94 void TransformFeedback::begin(GLenum primitiveMode)
     95 {
     96 	mActive = true; mPrimitiveMode = primitiveMode;
     97 }
     98 
     99 void TransformFeedback::end()
    100 {
    101 	mActive = false;
    102 	mPaused = false;
    103 	mVertexOffset = 0;
    104 }
    105 
    106 void TransformFeedback::setPaused(bool paused)
    107 {
    108 	mPaused = paused;
    109 }
    110 
    111 void TransformFeedback::setGenericBuffer(Buffer* buffer)
    112 {
    113 	mGenericBuffer = buffer;
    114 }
    115 
    116 void TransformFeedback::setBuffer(GLuint index, Buffer* buffer)
    117 {
    118 	mBuffer[index].set(buffer);
    119 }
    120 
    121 void TransformFeedback::setBuffer(GLuint index, Buffer* buffer, GLintptr offset, GLsizeiptr size)
    122 {
    123 	mBuffer[index].set(buffer, static_cast<int>(offset), static_cast<int>(size));
    124 }
    125 
    126 void TransformFeedback::detachBuffer(GLuint buffer)
    127 {
    128 	if(mGenericBuffer.name() == buffer)
    129 	{
    130 		mGenericBuffer = nullptr;
    131 	}
    132 
    133 	for(int i = 0; i < MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS; ++i)
    134 	{
    135 		if(mBuffer[i].get().name() == buffer)
    136 		{
    137 			mBuffer[i].set(nullptr);
    138 		}
    139 	}
    140 }
    141 
    142 }
    143