void Renderer::drawBatchedTriangles()
{
if(_queuedTriangleCommands.empty())
return;
CCGL_DEBUG_INSERT_EVENT_MARKER("RENDERER_BATCH_TRIANGLES");
_filledVertex = 0;
_filledIndex = 0;
/************** 1: Setup up vertices/indices *************/
_triBatchesToDraw[0].offset = 0;
_triBatchesToDraw[0].indicesToDraw = 0;
_triBatchesToDraw[0].cmd = nullptr;
int batchesTotal = 0;
int prevMaterialID = -1;
bool firstCommand = true;
for(const auto& cmd : _queuedTriangleCommands)
{
auto currentMaterialID = cmd->getMaterialID();
const bool batchable = !cmd->isSkipBatching();
fillVerticesAndIndices(cmd);
// in the same batch ?
if (batchable && (prevMaterialID == currentMaterialID || firstCommand))
{
CC_ASSERT(firstCommand || _triBatchesToDraw[batchesTotal].cmd->getMaterialID() == cmd->getMaterialID() && "argh... error in logic");
_triBatchesToDraw[batchesTotal].indicesToDraw += cmd->getIndexCount();
_triBatchesToDraw[batchesTotal].cmd = cmd;
}
else
{
// is this the first one?
if (!firstCommand) {
batchesTotal++;
_triBatchesToDraw[batchesTotal].offset = _triBatchesToDraw[batchesTotal-1].offset + _triBatchesToDraw[batchesTotal-1].indicesToDraw;
}
_triBatchesToDraw[batchesTotal].cmd = cmd;
_triBatchesToDraw[batchesTotal].indicesToDraw = (int) cmd->getIndexCount();
// is this a single batch ? Prevent creating a batch group then
if (!batchable)
currentMaterialID = -1;
}
// capacity full ?
if (batchesTotal + 1 >= _triBatchesToDrawCapacity) {
_triBatchesToDrawCapacity *= 1.4;
_triBatchesToDraw = (TriBatchToDraw*) realloc(_triBatchesToDraw, sizeof(_triBatchesToDraw[0]) * _triBatchesToDrawCapacity);
}
prevMaterialID = currentMaterialID;
firstCommand = false;
}
batchesTotal++;
/************** 2: Copy vertices/indices to GL objects *************/
auto conf = Configuration::getInstance();
if (conf->supportsShareableVAO() && conf->supportsMapBuffer())
{
//Bind VAO
GL::bindVAO(_buffersVAO);
//Set VBO data
glBindBuffer(GL_ARRAY_BUFFER, _buffersVBO[0]);
// option 1: subdata
// glBufferSubData(GL_ARRAY_BUFFER, sizeof(_quads[0])*start, sizeof(_quads[0]) * n , &_quads[start] );
// option 2: data
// glBufferData(GL_ARRAY_BUFFER, sizeof(_verts[0]) * _filledVertex, _verts, GL_STATIC_DRAW);
// option 3: orphaning + glMapBuffer
// FIXME: in order to work as fast as possible, it must "and the exact same size and usage hints it had before."
// source: https://www.opengl.org/wiki/Buffer_Object_Streaming#Explicit_multiple_buffering
// so most probably we won't have any benefit of using it
glBufferData(GL_ARRAY_BUFFER, sizeof(_verts[0]) * _filledVertex, nullptr, GL_STATIC_DRAW);
void *buf = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
memcpy(buf, _verts, sizeof(_verts[0]) * _filledVertex);
glUnmapBuffer(GL_ARRAY_BUFFER);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _buffersVBO[1]);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(_indices[0]) * _filledIndex, _indices, GL_STATIC_DRAW);
}
else
{
// Client Side Arrays
#define kQuadSize sizeof(_verts[0])
glBindBuffer(GL_ARRAY_BUFFER, _buffersVBO[0]);
glBufferData(GL_ARRAY_BUFFER, sizeof(_verts[0]) * _filledVertex , _verts, GL_DYNAMIC_DRAW);
GL::enableVertexAttribs(GL::VERTEX_ATTRIB_FLAG_POS_COLOR_TEX);
// vertices
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 3, GL_FLOAT, GL_FALSE, kQuadSize, (GLvoid*) offsetof(V3F_C4B_T2F, vertices));
// colors
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, kQuadSize, (GLvoid*) offsetof(V3F_C4B_T2F, colors));
// tex coords
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_TEX_COORD, 2, GL_FLOAT, GL_FALSE, kQuadSize, (GLvoid*) offsetof(V3F_C4B_T2F, texCoords));
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _buffersVBO[1]);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(_indices[0]) * _filledIndex, _indices, GL_STATIC_DRAW);
}
/************** 3: Draw *************/
for (int i=0; i<batchesTotal; ++i)
{
CC_ASSERT(_triBatchesToDraw[i].cmd && "Invalid batch");
_triBatchesToDraw[i].cmd->useMaterial();
glDrawElements(GL_TRIANGLES, (GLsizei) _triBatchesToDraw[i].indicesToDraw, GL_UNSIGNED_SHORT, (GLvoid*) (_triBatchesToDraw[i].offset*sizeof(_indices[0])) );
_drawnBatches++;
_drawnVertices += _triBatchesToDraw[i].indicesToDraw;
}
/************** 4: Cleanup *************/
if (Configuration::getInstance()->supportsShareableVAO())
{
//Unbind VAO
GL::bindVAO(0);
}
else
{
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
_queuedTriangleCommands.clear();
_filledVertex = 0;
_filledIndex = 0;
}
void TextureAtlas::drawNumberOfQuads(ssize_t numberOfQuads, ssize_t start)
{
CCASSERT(numberOfQuads>=0 && start>=0, "numberOfQuads and start must be >= 0");
if(!numberOfQuads)
return;
GL::bindTexture2D(_texture->getName());
auto conf = Configuration::getInstance();
if (conf->supportsShareableVAO() && conf->supportsMapBuffer())
{
//
// Using VBO and VAO
//
// FIXME:: update is done in draw... perhaps it should be done in a timer
if (_dirty)
{
glBindBuffer(GL_ARRAY_BUFFER, _buffersVBO[0]);
// option 1: subdata
// glBufferSubData(GL_ARRAY_BUFFER, sizeof(_quads[0])*start, sizeof(_quads[0]) * n , &_quads[start] );
// option 2: data
// glBufferData(GL_ARRAY_BUFFER, sizeof(quads_[0]) * (n-start), &quads_[start], GL_DYNAMIC_DRAW);
// option 3: orphaning + glMapBuffer
glBufferData(GL_ARRAY_BUFFER, sizeof(_quads[0]) * _capacity, nullptr, GL_DYNAMIC_DRAW);
void *buf = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
memcpy(buf, _quads, sizeof(_quads[0])* _totalQuads);
glUnmapBuffer(GL_ARRAY_BUFFER);
glBindBuffer(GL_ARRAY_BUFFER, 0);
_dirty = false;
}
GL::bindVAO(_VAOname);
#if CC_REBIND_INDICES_BUFFER
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _buffersVBO[1]);
#endif
glDrawElements(GL_TRIANGLES, (GLsizei) numberOfQuads*6, GL_UNSIGNED_SHORT, (GLvoid*) (start*6*sizeof(_indices[0])) );
GL::bindVAO(0);
#if CC_REBIND_INDICES_BUFFER
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
#endif
// glBindVertexArray(0);
}
else
{
//
// Using VBO without VAO
//
#define kQuadSize sizeof(_quads[0].bl)
glBindBuffer(GL_ARRAY_BUFFER, _buffersVBO[0]);
// FIXME:: update is done in draw... perhaps it should be done in a timer
if (_dirty)
{
glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(_quads[0]) * _totalQuads , &_quads[0] );
_dirty = false;
}
GL::enableVertexAttribs(GL::VERTEX_ATTRIB_FLAG_POS_COLOR_TEX);
// vertices
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_POSITION, 3, GL_FLOAT, GL_FALSE, kQuadSize, (GLvoid*) offsetof(V3F_C4B_T2F, vertices));
// colors
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, kQuadSize, (GLvoid*) offsetof(V3F_C4B_T2F, colors));
// tex coords
glVertexAttribPointer(GLProgram::VERTEX_ATTRIB_TEX_COORD, 2, GL_FLOAT, GL_FALSE, kQuadSize, (GLvoid*) offsetof(V3F_C4B_T2F, texCoords));
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _buffersVBO[1]);
glDrawElements(GL_TRIANGLES, (GLsizei)numberOfQuads*6, GL_UNSIGNED_SHORT, (GLvoid*) (start*6*sizeof(_indices[0])));
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
CC_INCREMENT_GL_DRAWN_BATCHES_AND_VERTICES(1,numberOfQuads*6);
CHECK_GL_ERROR_DEBUG();
}