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bizwaregl - add function to read back the contents of a texture into a BitmapBuffer

This commit is contained in:
zeromus 2014-02-07 23:06:51 +00:00
parent 9ca6f152cf
commit b469a3be00
4 changed files with 27 additions and 22 deletions
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11
Bizware/BizHawk.Bizware.BizwareGL.OpenTK/IGL_TK.cs
View File

@ -434,6 +434,17 @@ namespace BizHawk.Bizware.BizwareGL.Drivers.OpenTK
return ret;
}
public unsafe BitmapBuffer ResolveTexture2d(Texture2d tex)
{
//note - this is dangerous since it changes the bound texture. could we save it?
BindTexture2d(tex);
var bb = new BitmapBuffer(tex.IntWidth, tex.IntHeight);
var bmpdata = bb.LockBits();
GL.GetTexImage(TextureTarget.Texture2D, 0, PixelFormat.Bgra, PixelType.Byte, bmpdata.Scan0);
bb.UnlockBits(bmpdata);
return bb;
}
public Texture2d LoadTexture(string path)
{
using (var fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read))

7
Bizware/BizHawk.Bizware.BizwareGL/IGL.cs
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@ -19,7 +19,6 @@ namespace BizHawk.Bizware.BizwareGL
/// </summary>
public interface IGL : IDisposable
{
/// <summary>
/// Clears the specified buffer parts
/// </summary>
@ -126,6 +125,11 @@ namespace BizHawk.Bizware.BizwareGL
/// </summary>
void FreeTexture(IntPtr texHandle);
/// <summary>
/// resolves the texture into a new BitmapBuffer
/// </summary>
BitmapBuffer ResolveTexture2d(Texture2d texture);
/// <summary>
/// frees the provided render target
/// </summary>
@ -134,7 +138,6 @@ namespace BizHawk.Bizware.BizwareGL
/// <summary>
/// Binds this texture as the current texture2d target for parameter-specification
/// </summary>
/// <param name="texture"></param>
void BindTexture2d(Texture2d texture);
/// <summary>

25
Bizware/BizHawk.Bizware.BizwareGL/Texture2d.cs
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@ -13,24 +13,13 @@ namespace BizHawk.Bizware.BizwareGL
/// </summary>
public class Texture2d : IDisposable
{
//not sure if I need this idea.
//public class Maker
//{
// public Maker(Texture2d tex)
// {
// MyTexture = tex;
// }
// public void SetWidth(int width)
// {
// MyTexture.Width = width;
// }
// public void SetHeight(int width)
// {
// MyTexture.Height = height;
// }
// Texture2d MyTexture;
//}
/// <summary>
/// resolves the texture into a new BitmapBuffer
/// </summary>
public BitmapBuffer Resolve()
{
return Owner.ResolveTexture2d(this);
}
public void Dispose()
{

6
Bizware/BizHawk.Bizware.Test/Program.cs
View File

@ -59,6 +59,8 @@ namespace BizHawk.Bizware.Test
gr.End();
rt.Unbind();
Texture2d rttex2d = igl.LoadTexture(rt.Texture2d.Resolve());
//test retroarch shader
RenderTarget rt2 = igl.CreateRenderTarget(240, 240);
rt2.Bind();
@ -68,7 +70,7 @@ namespace BizHawk.Bizware.Test
using (var stream = typeof(Program).Assembly.GetManifestResourceStream("BizHawk.Bizware.Test.TestImages.4xSoft.glsl"))
shader = new RetroShader(igl, new System.IO.StreamReader(stream).ReadToEnd());
igl.SetBlendState(igl.BlendNone);
shader.Run(rt.Texture2d, new Size(60, 60), new Size(240, 240), true);
shader.Run(rttex2d, new Size(60, 60), new Size(240, 240), true);
bool running = true;
@ -101,7 +103,7 @@ namespace BizHawk.Bizware.Test
gr.RectFill(250, 0, 16, 16);
gr.SetBlendState(igl.BlendNone);
gr.Draw(rt.Texture2d, 0, 20);
gr.Draw(rttex2d, 0, 20);
gr.SetBlendState(igl.BlendNormal);
sr.RenderString(gr, 0, 0, "?? fps");