ULRE/example/Texture/texture_rect.cpp

// 画一个带纹理的矩形，2D模式专用

#include"VulkanAppFramework.h"
#include<hgl/graph/VKTexture.h>
#include<hgl/graph/VKSampler.h>
#include<hgl/graph/VKInlinePipeline.h>
#include<hgl/graph/PrimitiveCreater.h>
#include<hgl/graph/mtl/Material2DCreateConfig.h>
#include<hgl/math/Math.h>

using namespace hgl;
using namespace hgl::graph;

VK_NAMESPACE_BEGIN
Texture2D *CreateTexture2DFromFile(VulkanDevice *device,const OSString &filename);
VK_NAMESPACE_END

constexpr uint32_t SCREEN_WIDTH=256;
constexpr uint32_t SCREEN_HEIGHT=256;

constexpr float position_data[4]=
{
    0,     //left
    0,     //top
    1,     //right
    1      //bottom
};

constexpr float tex_coord_data[4]=
{
    0,0,
    1,1
};

class TestApp:public VulkanApplicationFramework
{
private:

    Texture2D *         texture             =nullptr;
    Sampler *           sampler             =nullptr;
    Material *          material            =nullptr;
    MaterialInstance *  material_instance   =nullptr;
    Renderable *        render_obj          =nullptr;
    Pipeline *          pipeline            =nullptr;

private:

    bool InitMaterial()
    {
        mtl::Material2DCreateConfig cfg(device->GetDevAttr(),"RectTexture2D",PrimitiveType::SolidRectangles);

        cfg.coordinate_system=CoordinateSystem2D::ZeroToOne;
        cfg.local_to_world=false;

        material=db->LoadMaterial("Std2D/RectTexture2D",&cfg);

        if(!material)
            return(false);

//        pipeline=db->CreatePipeline(material_instance,sc_render_target,OS_TEXT("res/pipeline/solid2d"));
        pipeline=CreatePipeline(material,InlinePipeline::Solid2D,PrimitiveType::SolidRectangles);     //等同上一行，为Framework重载，默认使用swapchain的render target

        if(!pipeline)
            return(false);

        texture=db->LoadTexture2D(OS_TEXT("res/image/lena.Tex2D"),true);
        if(!texture)return(false);

        sampler=db->CreateSampler();

        if(!material->BindImageSampler( DescriptorSetType::PerMaterial,     ///<描述符合集
                                        mtl::SamplerName::BaseColor,        ///<采样器名称
                                        texture,                            ///<纹理
                                        sampler))                           ///<采样器
            return(false);

        material_instance=db->CreateMaterialInstance(material);

        return(true);
    }

    bool InitVBO()
    {
        PrimitiveCreater rpc(device,material_instance->GetVIL());
        
        rpc.Init("Rectangle",1);

        if(!rpc.WriteVAB(VAN::Position,VF_V4F,position_data))return(false);
        if(!rpc.WriteVAB(VAN::TexCoord,VF_V4F,tex_coord_data))return(false);

        render_obj=db->CreateRenderable(&rpc,material_instance,pipeline);
        return(render_obj);
    }

public:

    bool Init()
    {
        if(!VulkanApplicationFramework::Init(SCREEN_WIDTH,SCREEN_HEIGHT))
            return(false);
            
        if(!InitMaterial())
            return(false);

        if(!InitVBO())
            return(false);
            
        BuildCommandBuffer(render_obj);

        return(true);
    }

    void Resize(uint w,uint h)override
    {
        VulkanApplicationFramework::Resize(w,h);
        
        BuildCommandBuffer(render_obj);
    }
};//class TestApp:public VulkanApplicationFramework

int main(int,char **)
{
#ifdef _DEBUG
    if(!CheckStrideBytesByFormat())
        return 0xff;
#endif//

    TestApp app;

    if(!app.Init())
        return(-1);

    while(app.Run());

    return 0;
}