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Optimized Buffer locking/filling

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Former-commit-id: 41cb66257f3eeef375086bf51f26230a06ca9eb8
This commit is contained in:
Lynix
2013-03-06 22:40:15 +01:00
parent aa67a52e9c
commit 9f780ef2bd
8 changed files with 26 additions and 17 deletions
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25
src/Nazara/Renderer/HardwareBuffer.cpp
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@@ -4,6 +4,7 @@
#include <Nazara/Renderer/OpenGL.hpp>
#include <Nazara/Renderer/HardwareBuffer.hpp>
#include <Nazara/Core/Clock.hpp>
#include <Nazara/Core/Error.hpp>
#include <Nazara/Renderer/Context.hpp>
#include <cstring>
@@ -105,29 +106,32 @@ void NzHardwareBuffer::Destroy()
glDeleteBuffers(1, &m_buffer);
}
bool NzHardwareBuffer::Fill(const void* data, unsigned int offset, unsigned int size)
bool NzHardwareBuffer::Fill(const void* data, unsigned int offset, unsigned int size, bool forceDiscard)
{
NzContext::EnsureContext();
unsigned int totalSize = m_parent->GetSize();
if (!forceDiscard)
forceDiscard = (size == totalSize);
GLuint previous;
glGetIntegerv(NzOpenGL::BufferTargetBinding[m_type], reinterpret_cast<GLint*>(&previous));
if (previous != m_buffer)
glBindBuffer(NzOpenGL::BufferTarget[m_type], m_buffer);
// http://www.opengl.org/wiki/Vertex_Specification_Best_Practices
if (forceDiscard)
glBufferData(NzOpenGL::BufferTarget[m_type], totalSize, nullptr, NzOpenGL::BufferUsage[m_parent->GetUsage()]); // Discard
// Il semblerait que glBuffer(Sub)Data soit plus performant que glMapBuffer(Range) en dessous d'un certain seuil
// http://www.stevestreeting.com/2007/03/17/glmapbuffer-vs-glbuffersubdata-the-return/
if (size < 32*1024)
{
// http://www.opengl.org/wiki/Vertex_Specification_Best_Practices
if (size == m_parent->GetSize())
glBufferData(NzOpenGL::BufferTarget[m_type], size, nullptr, NzOpenGL::BufferUsage[m_parent->GetUsage()]); // Discard
glBufferSubData(NzOpenGL::BufferTarget[m_type], offset, size, data);
}
else
{
nzUInt8* ptr = mapBuffer(m_type, (size == m_parent->GetSize()) ? nzBufferAccess_DiscardAndWrite : nzBufferAccess_WriteOnly, offset, size);
nzUInt8* ptr = mapBuffer(m_type, (forceDiscard) ? nzBufferAccess_DiscardAndWrite : nzBufferAccess_WriteOnly, offset, size);
if (!ptr)
{
NazaraError("Failed to map buffer");
@@ -141,7 +145,7 @@ bool NzHardwareBuffer::Fill(const void* data, unsigned int offset, unsigned int
// Une erreur rare est survenue, nous devons réinitialiser le buffer
NazaraError("Failed to unmap buffer, reinitialising content... (OpenGL error : 0x" + NzString::Number(glGetError(), 16) + ')');
glBufferData(NzOpenGL::BufferTarget[m_type], m_parent->GetSize(), nullptr, NzOpenGL::BufferUsage[m_parent->GetStorage()]);
glBufferData(NzOpenGL::BufferTarget[m_type], totalSize, nullptr, NzOpenGL::BufferUsage[m_parent->GetStorage()]);
return false;
}
@@ -175,6 +179,9 @@ void* NzHardwareBuffer::Map(nzBufferAccess access, unsigned int offset, unsigned
if (previous != m_buffer)
glBindBuffer(NzOpenGL::BufferTarget[m_type], m_buffer);
if (access == nzBufferAccess_DiscardAndWrite)
glBufferData(NzOpenGL::BufferTarget[m_type], m_parent->GetSize(), nullptr, NzOpenGL::BufferUsage[m_parent->GetUsage()]); // Discard
void* ptr = mapBuffer(m_type, access, offset, size);
// Inutile de rebinder s'il n'y avait aucun buffer (Optimise les opérrations chaînées)

2
src/Nazara/Renderer/HardwareBuffer.hpp
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@@ -22,7 +22,7 @@ class NzHardwareBuffer : public NzBufferImpl
bool Create(unsigned int size, nzBufferUsage usage = nzBufferUsage_Static);
void Destroy();
bool Fill(const void* data, unsigned int offset, unsigned int size);
bool Fill(const void* data, unsigned int offset, unsigned int size, bool forceDiscard);
void* GetPointer();

2
src/Nazara/Renderer/Renderer.cpp
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@@ -372,7 +372,7 @@ void NzRenderer::FillInstancingBuffer(const NzRenderer::InstancingData* instanci
}
#endif
if (!s_instancingBuffer->Fill(instancingData, 0, instanceCount))
if (!s_instancingBuffer->Fill(instancingData, 0, instanceCount, true))
NazaraError("Failed to fill instancing buffer");
}