140 lines
2.5 KiB
C++
140 lines
2.5 KiB
C++
#include<hgl/render/RenderDevice.h>
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#include<hgl/render/RenderWindow.h>
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#include<iostream>
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#include<GLEWCore/glew.h>
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#include<hgl/render/Shader.h>
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#include<hgl/math/Math.h>
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using namespace hgl;
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constexpr uint screen_width=1280;
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constexpr uint screen_height=720;
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Matrix4f ortho_2d_matrix;
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void InitMatrix()
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{
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ortho_2d_matrix=ortho2d(screen_width,screen_height, //2D画面宽高
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false); //Y轴使用底为0顶为1
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}
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constexpr char vertex_shader[]=R"(
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#version 330 core
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uniform mat4 ModelViewProjectionMatrix;
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in vec2 Vertex;
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in vec3 Color;
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out vec4 FragmentColor;
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void main()
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{
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vec4 Position;
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FragmentColor=vec4(Color,1.0);
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Position=vec4(Vertex,0.0,1.0);
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gl_Position=Position*ModelViewProjectionMatrix;
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})";
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constexpr char fragment_shader[]=R"(
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#version 330 core
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in vec4 FragmentColor;
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out vec4 FragColor;
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void main()
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{
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FragColor=vec4(FragmentColor.rgb,1);
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})";
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Shader shader;
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bool InitShader()
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{
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if(!shader.AddVertexShader(vertex_shader))
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return(false);
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if(!shader.AddFragmentShader(fragment_shader))
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return(false);
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if(!shader.Build())
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return(false);
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if(!shader.Use())
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return(false);
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if(!shader.SetUniformMatrix4fv("ModelViewProjectionMatrix",ortho_2d_matrix))
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return(false);
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return(true);
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}
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constexpr GLfloat clear_color[4]=
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{
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77.f/255.f,
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78.f/255.f,
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83.f/255.f,
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1.f
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};
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constexpr GLfloat clear_depth=1.0f;
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void draw()
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{
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glClearBufferfv(GL_COLOR,0,clear_color);
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glClearBufferfv(GL_DEPTH,0,&clear_depth);
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}
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int main(void)
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{
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RenderDevice *device=CreateRenderDeviceGLFW();
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if(!device)
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{
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std::cerr<<"Create RenderDevice(GLFW) failed."<<std::endl;
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return -1;
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}
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if(!device->Init())
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{
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std::cerr<<"Init RenderDevice(GLFW) failed."<<std::endl;
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return -2;
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}
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WindowSetup ws;
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ws.Name=U8_TEXT("Direct use \"OpenGL Core API\" Render");
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RenderSetup rs;
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RenderWindow *win=device->CreateWindow(screen_width,screen_height,&ws,&rs);
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win->MakeToCurrent(); //切换当前窗口到前台
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InitMatrix();
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if(!InitShader())
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{
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std::cerr<<"init shader failed."<<std::endl;
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return -3;
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}
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win->Show();
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while(win->IsOpen())
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{
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draw();
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win->SwapBuffer(); //交换前后台显示缓冲区
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win->PollEvent(); //处理窗口事件
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}
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delete win;
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delete device;
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return 0;
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}
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