is it possible to render one pixel using DirectX 11? if its possible how to do it ?
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\$\begingroup\$ You can draw a single point and then swap, but why would you do that? \$\endgroup\$– Chuck WalbournCommented Oct 22, 2016 at 0:14
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\$\begingroup\$ I want to write a software render using DirectX11 just for learning purposes. but what do you mean by drawing a single point and then swap ? \$\endgroup\$– Andre AhmedCommented Oct 22, 2016 at 0:19
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\$\begingroup\$ Just render a point. \$\endgroup\$– KrythicCommented Oct 22, 2016 at 0:56
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\$\begingroup\$ You sadly can't learn anything from creating a softwer renderer that's not obsolete or useless \$\endgroup\$– BálintCommented Oct 22, 2016 at 10:55
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1 Answer
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Your best option is to use a DYNAMIC 2D texture, and each 'frame' copy from a 2D array in system memory that your software renderer produces to the DYNAMIC 2D texture using Map/Unmap. You can then render a full-screen quad using your DYNAMIC 2D texture to get it into the render target backbuffer in the DXGI swapchain, and then Present to swap the buffers.
See How to: Use dynamic resources
You can use
SpriteBatchin the DirectX Tool Kit to do the 'full-screen quad render' trick of your DYNAMIC texture.
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\$\begingroup\$ In addition to textures, could also use the vertex buffer or a cbuffer (or any of the other buffers really) \$\endgroup\$ Commented Oct 22, 2016 at 3:11
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\$\begingroup\$ If the OP wants to render the result of a 'software rendererer', this is probably the fastest way rather than drawing
width * heightpoints. \$\endgroup\$ Commented Oct 22, 2016 at 7:01