昨天提到的我想到了個優化渲染的新方法。。今天花了一個早上終于實現了。5555其實不需要這么久，偏偏是一個小小的BUG花了我兩個小時。馬上進入正題吧。 原來的GUI渲染系統是每個Window都繼承于RenderCache，每個RenderCache中保存著需要渲染的矩形信息，然后每幀渲染的時候一個個矩形添加到渲染器中再動態修改頂點坐標（一個矩形對應6個頂點）。慢就慢在動態修改頂點！ 今天實現的新方法，就是直接把頂點保存在RenderCache中，然后每幀渲染的時候直接DrawIndexedPrimitiveUP出來，Release版速度從500提升到550FPS了。DEBUG版從130提升到360FPS（主要是stl的東西在debug版下慢許多）。 貼下RenderCache的代碼 h文件  #pragma?once
#include?"GameCorePreReq.h"
#include?"Rect.h"
#include?"ListHelper.h"
#include?"GCVector3.h"
#include?"GCVector2.h"
#include?"GCArray.h"
#define?GUI_Z?0.0f
//?四個角的顏色
struct?BoundsColor
   {
 ????BoundsColor(
????????GC3DCOLOR?crTopLeft?,?
????????GC3DCOLOR?crTopRight?,?
????????GC3DCOLOR?crBottomLeft?,?
????????GC3DCOLOR?crBottomRight
????????)
????????:?m_crTopLeft(crTopLeft)
????????,?m_crTopRight(crTopRight)
????????,?m_crBottomLeft(crBottomLeft)
????????,?m_crBottomRight(crBottomRight)
  ????{
 ????};
????BoundsColor(GC3DCOLOR?color)
????????:?m_crTopLeft(color)
????????,?m_crTopRight(color)
????????,?m_crBottomLeft(color)
????????,?m_crBottomRight(color)
????{
????};
????BoundsColor(const?BoundsColor?&color)
????{
????????*this?=?color;
????};
????BoundsColor(){};
????void?SetRefAlpha(const?float?&fAlpha)
????{
????????GC3DCOLOR_SETA(m_crTopLeft?,?GC3DCOLOR_GETA(m_crTopLeft)?*?fAlpha);
????????GC3DCOLOR_SETA(m_crTopRight?,?GC3DCOLOR_GETA(m_crTopRight)?*?fAlpha);
????????GC3DCOLOR_SETA(m_crBottomLeft?,?GC3DCOLOR_GETA(m_crBottomLeft)?*?fAlpha);
????????GC3DCOLOR_SETA(m_crBottomRight?,?GC3DCOLOR_GETA(m_crBottomRight)?*?fAlpha);
????}
????void?SetAlpha(const?float?&fAlpha)
????{
????????GC3DCOLOR_SETA(m_crTopLeft?,?fAlpha);
????????GC3DCOLOR_SETA(m_crTopRight?,?fAlpha);
????????GC3DCOLOR_SETA(m_crBottomLeft?,?fAlpha);
????????GC3DCOLOR_SETA(m_crBottomRight?,?fAlpha);
????}
????GC3DCOLOR?m_crTopLeft;
????GC3DCOLOR?m_crTopRight;
????GC3DCOLOR?m_crBottomLeft;
????GC3DCOLOR?m_crBottomRight;
????BoundsColor?&?operator?=(const?BoundsColor&?color)
????{
????????m_crTopLeft?=?color.m_crTopLeft;
????????m_crTopRight?=?color.m_crTopRight;
????????m_crBottomLeft?=?color.m_crBottomLeft;
????????m_crBottomRight?=?color.m_crBottomRight;
????????return?*this;
????}
 };
//?一個頂點
struct?QuadVertex
{
????QuadVertex(f32?x?,?f32?y?,?GC3DCOLOR?color?,?f32?ux?,?f32?uy?,?Texture?*pTexture)
????????:?m_pos(x?,?y?,?GUI_Z)
????????,?m_rhw(1)
????????,?m_diffuse(color)
????????,?m_uv(ux?,?uy)
????????,?m_pTexture(pTexture)
????{
????};
????Vector3?m_pos;????????????//?頂點的位置
????float??m_rhw;????????????????//?始終設置為1
????GC3DCOLOR?m_diffuse;????????????//?顏色
????Vector2?m_uv;????????????????//?貼圖坐標
????Texture*?m_pTexture;????????//?紋理
};
//?需要渲染的隊列的一個方塊
struct?GUIRenderQuad
{
????GUIRenderQuad(const?Rect&?rectDest,?const?BoundsColor&?boundsColor,?Texture*?pTexture,?const?RectFloat?&rectTexture)
????????:?m_topLeft(rectDest.left?,?rectDest.top?,?boundsColor.m_crTopLeft?,?rectTexture.left?,?rectTexture.top?,?pTexture)
????????,?m_topRight(rectDest.right?,?rectDest.top?,?boundsColor.m_crTopRight?,?rectTexture.right?,?rectTexture.top?,?pTexture)
????????,?m_bottomLeft(rectDest.left?,?rectDest.bottom?,?boundsColor.m_crBottomLeft?,?rectTexture.left?,?rectTexture.bottom?,?pTexture)
????????,?m_bottomRight(rectDest.right?,?rectDest.bottom?,?boundsColor.m_crBottomRight?,?rectTexture.right?,?rectTexture.bottom?,?pTexture)
????{
????};
????QuadVertex?m_topLeft;
????QuadVertex?m_topRight;
????QuadVertex?m_bottomLeft;
????QuadVertex?m_bottomRight;
};
typedef?Array<GUIRenderQuad>?ListGUIRenderQuad;
class?GAMECORE_EXPORT?GUIRenderCache
{
protected:
????//?不允許顯式創建，只可以繼承
????GUIRenderCache(void);
public:
????virtual?~GUIRenderCache(void);
????//?添加到渲染隊列，支持很多版本的重載
????void?AddCache(const?Rect&?rectDest,?const?BoundsColor&?boundsColor,?Texture*?pTexture,?const?RectFloat?&rectTexture)
????{
????????AddCache(GUIRenderQuad(rectDest?,?boundsColor?,?pTexture?,?rectTexture));
????};
????void?AddCache(const?Rect&?rectDest,?const?BoundsColor&?boundsColor,?Texture*?pTexture)
????{
????????AddCache(GUIRenderQuad(rectDest?,?boundsColor?,?pTexture?,?RectFloat(0,0,1,1)));
????};
????void?AddCache(const?Rect&?rectDest,?const?BoundsColor&?boundsColor)
????{
????????AddCache(GUIRenderQuad(rectDest?,?boundsColor?,?0?,?RectFloat(0,0,1,1)));
????};
????void?AddCache(const?GUIRenderQuad?*quadPtr)
????{
????????AddCache(*quadPtr);
????}
????void?AddCache(const?GUIRenderQuad&?quad)
????{
????????m_listGUIRenderQuad.push_back(quad);
????}
????//?渲染到隊列
????void?RenderCache();
????//?直接渲染
????void?RenderDirect();
????//?清空cache隊列
????void?ClearCacheList(void)
????{
????????m_listGUIRenderQuad.clear();
????}
????void?SetDirty(bool?bDirty){m_bDirty?=?bDirty;};
????const?bool?IsDirty()?const{return?m_bDirty;};
protected:
????void?Cache()
????{
????????//?從新Cache隊列
????????if(m_bDirty)
????????{
????????????ClearCacheList();
????????????DoCache();
????????????m_bDirty?=?false;
????????}
????}
????//?Cache需要渲染的項目
????virtual?void?DoCache(){};
????ListGUIRenderQuad?m_listGUIRenderQuad;????//?渲染隊列
????bool?m_bDirty;????????????????????????????//?需要重新Cache需要渲染的項目
};
cpp文件 #include?"GameCorePreReq.h"
#include?"GUIRenderCache.h"
#include?"Systems.h"
#include?"GUIRendererSystem.h"
GUIRenderCache::GUIRenderCache(void)
:?m_bDirty(true)
{
}
GUIRenderCache::~GUIRenderCache(void)
{
}
//?渲染需要Cache隊列
void?GUIRenderCache::RenderCache()
{
????Cache();
????if(m_listGUIRenderQuad.empty())
????????return;
????ListGUIRenderQuad?*pQuad?=?&m_listGUIRenderQuad;
????Systems::GetSingleton().GetGUIRendererSystem()->PushBack(pQuad);
}
void?GUIRenderCache::RenderDirect()
{
????Cache();
????if(m_listGUIRenderQuad.empty())
????????return;
????Systems::GetSingleton().GetGUIRendererSystem()->RenderDirect(&m_listGUIRenderQuad);
}
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