需要SlimDX快速显示图像
需要SlimDX快速显示图像
提问于 2013-08-07 14:37:05
我需要非常快地显示图像(约60 FPS)。Picturebox/Panel没有在更高的分辨率下完成这项工作，所以我现在转向SlimDX，我希望这是正确的选择。
由于SlimDX使用Directx，而DirectX使用GPU，所以我应该能够非常快地完成它。据我理解，GPU处理图像的速度比CPU快得多。
我是这样做的：
MessagePump.Run(form, () =>
{
device.BeginScene();
sprite.Begin(SlimDX.Direct3D9.SpriteFlags.None);
tx = SlimDX.Direct3D9.Texture.FromStream(device, (new MemoryStream(reader.ReadBytes(reader.ReadInt32()))), SlimDX.Direct3D9.Usage.None, SlimDX.Direct3D9.Pool.Managed);
sprite.Draw(tx, Color.Transparent);
sprite.End();
device.EndScene();
device.Present();
});并初始化所有内容：
var form = new RenderForm("Test");
form.Width = 1280;
form.Height = 720;
SlimDX.Direct3D9.PresentParameters presentParams = new SlimDX.Direct3D9.PresentParameters
{
BackBufferWidth = form.Width,
BackBufferHeight = form.Height,
DeviceWindowHandle = form.Handle,
PresentFlags = SlimDX.Direct3D9.PresentFlags.None,
BackBufferCount = 0,
PresentationInterval = SlimDX.Direct3D9.PresentInterval.Immediate,
SwapEffect = SlimDX.Direct3D9.SwapEffect.Discard,
BackBufferFormat = SlimDX.Direct3D9.Format.A8R8G8B8,
Windowed = true,
};
device = new SlimDX.Direct3D9.Device(new SlimDX.Direct3D9.Direct3D(), 0, SlimDX.Direct3D9.DeviceType.Hardware, form.Handle, SlimDX.Direct3D9.CreateFlags.HardwareVertexProcessing, presentParams);
device.Viewport = new SlimDX.Direct3D9.Viewport(0, 0, form.Width, form.Height);
SlimDX.Direct3D9.Sprite sprite;
SlimDX.Direct3D9.Texture tx;
sprite = new SlimDX.Direct3D9.Sprite(device);
tx = new SlimDX.Direct3D9.Texture(device, form.Width, form.Height, 0, SlimDX.Direct3D9.Usage.None, SlimDX.Direct3D9.Format.X8R8G8B8, SlimDX.Direct3D9.Pool.Managed);这方面有两个问题：
- 它非常慢，picturebox要快得多
- 它不正确地显示图像(它被放大)
回答 1
Stack Overflow用户
发布于 2014-01-15 03:48:00
你需要缓存纹理，因为它们的每一个帧都是缓慢的。例如。
公共类CacheObjects {静态列表cacheSCBrushes =新列表()；
public static SolidColorBrush GetColorBrush(Color4 Color, Direct2D.RenderTarget renderTGT)
{
// ERROR: Not supported in C#: OnErrorStatement
SolidColorBrush returnBrush = null;
bool found = false;
foreach (void br_loopVariable in cacheSCBrushes) {
br = br_loopVariable;
if (br.Color.Red == Color.Red) {
if (br.Color.Green == Color.Green) {
if (br.Color.Blue == Color.Blue) {
if (br.Color.Alpha == Color.Alpha) {
found = true;
returnBrush = br;
exit for;
}
}
}
}
}
if (!found) {
returnBrush = new SolidColorBrush(renderTGT, Color);
cacheSCBrushes.Add(returnBrush);
}
return returnBrush;
}
public static void ClearCache()
{
foreach (void Brush_loopVariable in cacheSCBrushes) {
Brush = Brush_loopVariable;
Brush.Dispose();
}
}}
如果这是不可能的，那么在一个独立的线程中，加载下一个5 textures...Rendering是快速的，对象创建是缓慢的。
public void LoadTexture () {
//Load the next 5 here
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/18106289
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