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Fix superflous shader setting updates (#4800)

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This improves rendering performance by ~40%
This commit is contained in:
ShadowNinja 2016-11-22 09:05:39 -05:00 • committed by Zeno-
parent c6ca7a81cc
commit 4bf4154cad
3 changed files with 250 additions and 128 deletions
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63
src/shader.h
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@ -21,6 +21,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#ifndef SHADER_HEADER
#define SHADER_HEADER
#include <IMaterialRendererServices.h>
#include "irrlichttypes_extrabloated.h"
#include "threads.h"
#include <string>
@ -43,8 +44,7 @@ class IGameDef;
std::string getShaderPath(const std::string &name_of_shader,
const std::string &filename);
struct ShaderInfo
{
struct ShaderInfo {
std::string name;
video::E_MATERIAL_TYPE base_material;
video::E_MATERIAL_TYPE material;
@ -66,20 +66,66 @@ namespace irr { namespace video {
class IMaterialRendererServices;
} }
class IShaderConstantSetter
{
class IShaderConstantSetter {
public:
virtual ~IShaderConstantSetter(){};
virtual void onSetConstants(video::IMaterialRendererServices *services,
bool is_highlevel) = 0;
};
class IShaderConstantSetterFactory {
public:
virtual ~IShaderConstantSetterFactory() {};
virtual IShaderConstantSetter* create() = 0;
};
template <typename T, std::size_t count=1>
class CachedShaderSetting {
const char *m_name;
T m_sent[count];
bool has_been_set;
bool is_pixel;
protected:
CachedShaderSetting(const char *name, bool is_pixel) :
m_name(name), has_been_set(false), is_pixel(is_pixel)
{}
public:
void set(const T value[count], video::IMaterialRendererServices *services)
{
if (has_been_set && std::equal(m_sent, m_sent + count, value))
return;
if (is_pixel)
services->setPixelShaderConstant(m_name, value, count);
else
services->setVertexShaderConstant(m_name, value, count);
std::copy(value, value + count, m_sent);
has_been_set = true;
}
};
template <typename T, std::size_t count = 1>
class CachedPixelShaderSetting : public CachedShaderSetting<T, count> {
public:
CachedPixelShaderSetting(const char *name) :
CachedShaderSetting<T, count>(name, true){}
};
template <typename T, std::size_t count = 1>
class CachedVertexShaderSetting : public CachedShaderSetting<T, count> {
public:
CachedVertexShaderSetting(const char *name) :
CachedShaderSetting<T, count>(name, false){}
};
/*
ShaderSource creates and caches shaders.
*/
class IShaderSource
{
class IShaderSource {
public:
IShaderSource(){}
virtual ~IShaderSource(){}
@ -90,8 +136,7 @@ public:
const u8 material_type, const u8 drawtype){return 0;}
};
class IWritableShaderSource : public IShaderSource
{
class IWritableShaderSource : public IShaderSource {
public:
IWritableShaderSource(){}
virtual ~IWritableShaderSource(){}
@ -105,7 +150,7 @@ public:
virtual void insertSourceShader(const std::string &name_of_shader,
const std::string &filename, const std::string &program)=0;
virtual void rebuildShaders()=0;
virtual void addGlobalConstantSetter(IShaderConstantSetter *setter)=0;
virtual void addShaderConstantSetterFactory(IShaderConstantSetterFactory *setter) = 0;
};
IWritableShaderSource* createShaderSource(IrrlichtDevice *device);