How to get access to pixels in D3D11?
Call ID3D11DeviceContext::Map () on the staging resource to get access to the pixels. Call ID3D11DeviceContext::Unmap () on the staging resource. Call ID3D11DeviceContext::UpdateSubresource () to update the version of the resource the GPU has.
How to bind a texture to a shader?
If your intent is to use it as an input to another shader: – simply ensure you created the texture2D with the D3D11_BIND_RENDER_TARGET and D3D11_BIND_SHADER_RESOURCE. Bind the texture as render target and render to it. Unbind it as a render target and Bind it as a shader resource and use it in the next shader.
How to read and write pixels from render target directly?
After draw, how can i read and write pixels from render target directly , and present it then. If your intent is to use it as an input to another shader: – simply ensure you created the texture2D with the D3D11_BIND_RENDER_TARGET and D3D11_BIND_SHADER_RESOURCE.
What do you need to know about Direct3D 11?
Direct3D is usually quite verbose at reporting problems with function parameters. After your win32 creation code, but before the message loop starts, we can initialise some D3D11 systems. These functions require creating a few structs of parameters.
Is the id3d11device context thread safe in Direct3D 11?
Organizing the work across multiple threads requires synchronization to prevent one thread from modifying or reading data that is being modified by another thread. While the use of a device context ( ID3D11DeviceContext) is not thread-safe, the use of a Direct3D 11 device ( ID3D11Device) is thread-safe.
What is the purpose of multithreading in Direct3D 11?
However, with the built in synchronization in Direct3D 11, the goal behind multithreading is to utilize every CPU and GPU cycle without making a processor wait for another processor (particularly not making the GPU wait because it directly impacts frame rate).
Can a GPU directly access a Texture2D pixel?
Unfortunately, due to current GPU architectures, it is not possible to directly access a texture2D’s pixels since the pixels actually live in GPU memory potential in a special format (swizzled format). Create a texture the GPU can render into. Create a staging texture (D3D11_USAGE_STAGING) that will be used to receive the output of the GPU.