100 lines
2.3 KiB
C++
100 lines
2.3 KiB
C++
#include<hgl/graph/VKPhysicalDevice.h>
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#include<hgl/graph/TileData.h>
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#include<hgl/graph/module/TextureManager.h>
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namespace
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{
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using namespace hgl;
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void AnalyseSize(uint &fw,uint &fh,const uint w,const uint h,const uint count,const uint32_t max_texture_size)
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{
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uint total,tw,th,t;
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fw=fh=0;
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tw=max_texture_size;
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while(tw>=w)
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{
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th=max_texture_size;
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while(th>=h)
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{
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t=(tw/w)*(th/h);
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if(!fw)
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{
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fw=tw;
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fh=th;
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total=t;
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}
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else
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{
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if(t==count)
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{
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//正好，就要这么大的
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fw=tw;
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fh=th;
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return;
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}
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else
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if(t>count) //要比要求的最大值大
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{
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if(t<total) //找到最接近最大值的
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{
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//比现在选中的更节省
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fw=tw;
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fh=th;
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total=t;
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}
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}
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}
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th>>=1;
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}
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tw>>=1;
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}
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}//void AnalyseSize
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}//namespace
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VK_NAMESPACE_BEGIN
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TileData *TextureManager::CreateTileData(const VkFormat format,const uint width,const uint height,const uint count)
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{
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if(!CheckVulkanFormat(format))
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return(nullptr);
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if(width<=0||height<=0||count<=0)
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return(nullptr);
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const uint32_t max_2d_texture=GetPhyDevice()->GetMaxImage2D();
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uint tex_width,tex_height;
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AnalyseSize(tex_width,tex_height,width,height,count,max_2d_texture);
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const VulkanFormat *vf=GetVulkanFormat(format);
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if(!vf)return(nullptr);
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Texture2D *tex=nullptr;
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VkExtent2D extent={tex_width,tex_height};
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if(RangeCheck(vf->color))
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{
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tex=CreateTexture2D(new ColorTextureCreateInfo(format,extent));
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}
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else
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if(RangeCheck(vf->depth))
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{
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tex=CreateTexture2D(new DepthTextureCreateInfo(format,extent));
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}
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else
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return(nullptr);
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return(new TileData(this,tex,width,height));
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}
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VK_NAMESPACE_END
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