代码为 codebus 另一先生的 文案 EasyX 的三种绘图抗锯齿方法 - CodeBus
这里移植到 devc++
移植操作如下:
调用dev++ 的链接库方式:
project -> project option -> 如图所示
稍作修改的代码。
#include <graphics.h>
#include <d2d1.h>
#include <wincodec.h>
#include <stdio.h>
#pragma comment(lib, "d2d1.lib")
#pragma comment(lib, "dwrite.lib")
// D2D 对象的安全释放
template <class T> void DxObjectSafeRelease(T** ppT)
{
if (*ppT)
{
(*ppT)->Release();
*ppT = NULL;
}
}
int main()
{
// 创建 EasyX 窗口
initgraph(340, 206);
SetWindowText(GetHWnd(), "D2D 硬件加速抗锯齿演示");
setlinestyle(PS_SOLID, 2);
// 创建 D2D 工厂
ID2D1Factory* Facotry = NULL;
HRESULT ResultHandle = D2D1CreateFactory(
D2D1_FACTORY_TYPE_SINGLE_THREADED,
&Facotry
);
// 创建 DC Render 并指定硬件加速
auto Property = D2D1::RenderTargetProperties(
D2D1_RENDER_TARGET_TYPE::D2D1_RENDER_TARGET_TYPE_HARDWARE,
D2D1::PixelFormat(
DXGI_FORMAT_B8G8R8A8_UNORM,
D2D1_ALPHA_MODE_IGNORE
), 0.0, 0.0, D2D1_RENDER_TARGET_USAGE_GDI_COMPATIBLE, D2D1_FEATURE_LEVEL_DEFAULT
);
// 创建 EasyX 兼容的 DC Render Target
ID2D1DCRenderTarget* DCRenderTarget;
HRESULT Result = Facotry->CreateDCRenderTarget(
&Property,
&DCRenderTarget
);
// 绑定 EasyX DC
RECT EasyXWindowRect = { 0, 0, 640, 480 };
DCRenderTarget->BindDC(GetImageHDC(), &EasyXWindowRect);
if (FAILED(Result))
{
printf("D2D Facotry Created Failed\n");
return -1;
}
// 创建画笔
ID2D1SolidColorBrush* WhiteBrush = NULL;
DCRenderTarget->CreateSolidColorBrush(
D2D1::ColorF(D2D1::ColorF::White),
&WhiteBrush
);
if (!WhiteBrush)
{
printf("D2D Brush Created Failed\n");
return -1;
}
BeginBatchDraw();
// 设置抗锯齿
DCRenderTarget->SetAntialiasMode(D2D1_ANTIALIAS_MODE::D2D1_ANTIALIAS_MODE_PER_PRIMITIVE);
// 调用 D2D 进行绘图
DCRenderTarget->BeginDraw();
DCRenderTarget->Clear(D2D_COLOR_F(D3DCOLORVALUE{ 0, 0, 0 }));
DCRenderTarget->DrawLine(D2D1_POINT_2F{ 200, 0 }, D2D1_POINT_2F{ 280, 80 }, WhiteBrush, 2.f);
DCRenderTarget->DrawEllipse(D2D1_ELLIPSE{ D2D1_POINT_2F{ 240, 140 }, 40, 40 }, WhiteBrush, 2.f);
DCRenderTarget->EndDraw();
// EasyX 对比绘图
line(0, 0, 80, 80);
ellipse(0, 100, 80, 180);
outtextxy(0, 80, "无抗锯齿画线");
outtextxy(165, 80, "D2D 硬件加速抗锯齿画线");
outtextxy(0, 184, "无抗锯齿画圆");
outtextxy(165, 184, "D2D 硬件加速抗锯齿画圆");
// 以约为 60fps 的帧率更新界面
while (true)
{
FlushBatchDraw();
Sleep(14);
}
EndBatchDraw();
// 释放 D2D 对象
DxObjectSafeRelease(&DCRenderTarget);
DxObjectSafeRelease(&WhiteBrush);
DxObjectSafeRelease(&Facotry);
return 0;
}