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kicad/common/gal/opengl/gpu_manager.cpp
Alex Shvartzkop 73a3b880a6 Slightly optimize GPU_CACHED_MANAGER::DrawIndices.
2024-06-12 16:04:47 +03:00

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright 2013-2017 CERN
* Copyright (C) 2021 KiCad Developers, see AUTHORS.txt for contributors.
*
* @author Maciej Suminski <maciej.suminski@cern.ch>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <gal/opengl/gpu_manager.h>
#include <gal/opengl/cached_container_gpu.h>
#include <gal/opengl/cached_container_ram.h>
#include <gal/opengl/noncached_container.h>
#include <gal/opengl/shader.h>
#include <gal/opengl/utils.h>
#include <gal/opengl/vertex_item.h>
#include <core/profile.h>
#include <typeinfo>
#include <confirm.h>
#include <trace_helpers.h>
#ifdef KICAD_GAL_PROFILE
#include <core/profile.h>
#include <wx/log.h>
#endif /* KICAD_GAL_PROFILE */
using namespace KIGFX;
GPU_MANAGER* GPU_MANAGER::MakeManager( VERTEX_CONTAINER* aContainer )
{
if( aContainer->IsCached() )
return new GPU_CACHED_MANAGER( aContainer );
else
return new GPU_NONCACHED_MANAGER( aContainer );
}
GPU_MANAGER::GPU_MANAGER( VERTEX_CONTAINER* aContainer ) :
m_isDrawing( false ),
m_container( aContainer ),
m_shader( nullptr ),
m_shaderAttrib( 0 ),
m_enableDepthTest( true )
{
}
GPU_MANAGER::~GPU_MANAGER()
{
}
void GPU_MANAGER::SetShader( SHADER& aShader )
{
m_shader = &aShader;
m_shaderAttrib = m_shader->GetAttribute( "a_shaderParams" );
if( m_shaderAttrib == -1 )
{
DisplayError( nullptr, wxT( "Could not get the shader attribute location" ) );
}
}
// Cached manager
GPU_CACHED_MANAGER::GPU_CACHED_MANAGER( VERTEX_CONTAINER* aContainer ) :
GPU_MANAGER( aContainer ),
m_buffersInitialized( false ),
m_indicesCapacity( 0 ),
m_totalHuge( 0 ),
m_totalNormal( 0 ),
m_indexBufSize( 0 ),
m_indexBufMaxSize( 0 ),
m_curVrangeSize( 0 )
{
}
GPU_CACHED_MANAGER::~GPU_CACHED_MANAGER()
{
}
void GPU_CACHED_MANAGER::BeginDrawing()
{
wxASSERT( !m_isDrawing );
m_curVrangeSize = 0;
m_indexBufMaxSize = 0;
m_indexBufSize = 0;
m_vranges.clear();
m_isDrawing = true;
}
void GPU_CACHED_MANAGER::DrawIndices( const VERTEX_ITEM* aItem )
{
// Hot path: don't use wxASSERT
assert( m_isDrawing );
unsigned int offset = aItem->GetOffset();
unsigned int size = aItem->GetSize();
if( size == 0 )
return;
if( size <= 1000 )
{
m_totalNormal += size;
m_vranges.emplace_back( offset, offset + size - 1, false );
m_curVrangeSize += size;
}
else
{
m_totalHuge += size;
m_vranges.emplace_back( offset, offset + size - 1, true );
m_indexBufSize = std::max( m_curVrangeSize, m_indexBufSize );
m_curVrangeSize = 0;
}
}
void GPU_CACHED_MANAGER::EndDrawing()
{
wxASSERT( m_isDrawing );
CACHED_CONTAINER* cached = static_cast<CACHED_CONTAINER*>( m_container );
if( cached->IsMapped() )
cached->Unmap();
m_indexBufSize = std::max( m_curVrangeSize, m_indexBufSize );
m_indexBufMaxSize = std::max( 2*m_indexBufSize, m_indexBufMaxSize );
resizeIndices( m_indexBufMaxSize );
if( m_enableDepthTest )
glEnable( GL_DEPTH_TEST );
else
glDisable( GL_DEPTH_TEST );
// Prepare buffers
glEnableClientState( GL_VERTEX_ARRAY );
glEnableClientState( GL_COLOR_ARRAY );
// Bind vertices data buffers
glBindBuffer( GL_ARRAY_BUFFER, cached->GetBufferHandle() );
glVertexPointer( COORD_STRIDE, GL_FLOAT, VERTEX_SIZE, (GLvoid*) COORD_OFFSET );
glColorPointer( COLOR_STRIDE, GL_UNSIGNED_BYTE, VERTEX_SIZE, (GLvoid*) COLOR_OFFSET );
if( m_shader != nullptr ) // Use shader if applicable
{
m_shader->Use();
glEnableVertexAttribArray( m_shaderAttrib );
glVertexAttribPointer( m_shaderAttrib, SHADER_STRIDE, GL_FLOAT, GL_FALSE, VERTEX_SIZE,
(GLvoid*) SHADER_OFFSET );
}
PROF_TIMER cntDraw( "gl-draw-elements" );
int n_ranges = m_vranges.size();
int n = 0;
GLuint* iptr = m_indices.get();
GLuint icnt = 0;
int drawCalls = 0;
while( n < n_ranges )
{
VRANGE* cur = &m_vranges[n];
if( cur->m_isContinuous )
{
if( icnt > 0 )
{
glDrawElements( GL_TRIANGLES, icnt, GL_UNSIGNED_INT, m_indices.get() );
drawCalls++;
}
icnt = 0;
iptr = m_indices.get();
glDrawArrays( GL_TRIANGLES, cur->m_start, cur->m_end - cur->m_start + 1 );
drawCalls++;
}
else
{
for( GLuint i = cur->m_start; i <= cur->m_end; i++ )
{
*iptr++ = i;
icnt++;
}
}
n++;
}
if( icnt > 0 )
{
glDrawElements( GL_TRIANGLES, icnt, GL_UNSIGNED_INT, m_indices.get() );
drawCalls++;
}
cntDraw.Stop();
KI_TRACE( traceGalProfile,
"Cached manager size: VBO size %u iranges %zu max elt size %u drawcalls %u\n",
cached->AllItemsSize(), m_vranges.size(), m_indexBufMaxSize, drawCalls );
KI_TRACE( traceGalProfile, "Timing: %s\n", cntDraw.to_string() );
glBindBuffer( GL_ARRAY_BUFFER, 0 );
cached->ClearDirty();
// Deactivate vertex array
glDisableClientState( GL_COLOR_ARRAY );
glDisableClientState( GL_VERTEX_ARRAY );
if( m_shader != nullptr )
{
glDisableVertexAttribArray( m_shaderAttrib );
m_shader->Deactivate();
}
m_isDrawing = false;
}
void GPU_CACHED_MANAGER::resizeIndices( unsigned int aNewSize )
{
if( aNewSize > m_indicesCapacity )
{
m_indicesCapacity = aNewSize;
m_indices.reset( new GLuint[m_indicesCapacity] );
}
}
// Noncached manager
GPU_NONCACHED_MANAGER::GPU_NONCACHED_MANAGER( VERTEX_CONTAINER* aContainer ) :
GPU_MANAGER( aContainer )
{
}
void GPU_NONCACHED_MANAGER::BeginDrawing()
{
// Nothing has to be prepared
}
void GPU_NONCACHED_MANAGER::DrawIndices( const VERTEX_ITEM* aItem )
{
wxASSERT_MSG( false, wxT( "Not implemented yet" ) );
}
void GPU_NONCACHED_MANAGER::EndDrawing()
{
#ifdef KICAD_GAL_PROFILE
PROF_TIMER totalRealTime;
#endif /* KICAD_GAL_PROFILE */
if( m_container->GetSize() == 0 )
return;
VERTEX* vertices = m_container->GetAllVertices();
GLfloat* coordinates = (GLfloat*) ( vertices );
GLubyte* colors = (GLubyte*) ( vertices ) + COLOR_OFFSET;
if( m_enableDepthTest )
glEnable( GL_DEPTH_TEST );
else
glDisable( GL_DEPTH_TEST );
// Prepare buffers
glEnableClientState( GL_VERTEX_ARRAY );
glEnableClientState( GL_COLOR_ARRAY );
glVertexPointer( COORD_STRIDE, GL_FLOAT, VERTEX_SIZE, coordinates );
glColorPointer( COLOR_STRIDE, GL_UNSIGNED_BYTE, VERTEX_SIZE, colors );
if( m_shader != nullptr ) // Use shader if applicable
{
GLfloat* shaders = (GLfloat*) ( vertices ) + SHADER_OFFSET / sizeof( GLfloat );
m_shader->Use();
glEnableVertexAttribArray( m_shaderAttrib );
glVertexAttribPointer( m_shaderAttrib, SHADER_STRIDE, GL_FLOAT, GL_FALSE, VERTEX_SIZE,
shaders );
}
glDrawArrays( GL_TRIANGLES, 0, m_container->GetSize() );
#ifdef KICAD_GAL_PROFILE
wxLogTrace( traceGalProfile, wxT( "Noncached manager size: %d" ), m_container->GetSize() );
#endif /* KICAD_GAL_PROFILE */
// Deactivate vertex array
glDisableClientState( GL_COLOR_ARRAY );
glDisableClientState( GL_VERTEX_ARRAY );
if( m_shader != nullptr )
{
glDisableVertexAttribArray( m_shaderAttrib );
m_shader->Deactivate();
}
m_container->Clear();
#ifdef KICAD_GAL_PROFILE
totalRealTime.Stop();
wxLogTrace( traceGalProfile, wxT( "GPU_NONCACHED_MANAGER::EndDrawing(): %.1f ms" ),
totalRealTime.msecs() );
#endif /* KICAD_GAL_PROFILE */
}
void GPU_MANAGER::EnableDepthTest( bool aEnabled )
{
m_enableDepthTest = aEnabled;
}
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