* D3D12: Fix readback for non-zero mip
* Fix blit with non-zero mip
This required clamping the blit extents to the mip size, which is moved out of the renderers now
* Assert formatting
* Adds UAV support for D3D12, Vulkan and reworked support for OpenGL, D3D11
UAV support is now uniform across compute and draw.
To set a UAV you just use bgfx::setImage() and IMAGE2D in the shader, just like in compute.
Due to these changes shaders will have to be recompiled.
The changes include:
- D3D11 requires patching of the UAV slot number (which is now done by modifying the DXBC instead of using a macro)
- If the DXBC binary includes a debug chunk, that is also patched to match the new slot number
- All the other renderers don't need any kind of patching
- There are some shader annotations to better convert the UAV format used in hlsl to spirv
Possibility of further enhancements:
- bgfx::setViewFrameBuffer() only supports binding to a framebuffer or, using BGFX_INVALID_HANDLE, to bind the default backbuffer. This doesn't allow for the case where there is no need to bind to either one of them, for example when using a fragment shader only to read and write to an UAV.
* Bump shader version, because they need to be recompiled.
* Avoid redundant uniform uploads
* Fix placement of GL_CHECK()s and import of glUniform4f.
* Fix typo
* Migrate GL uniform cache to use tinystl to conform to BGFX data structures
* Address review
* Address review
Use of the `flat` keyword will have `glslopt_optimize` run with glsl
version 130. In this mode, it will change calls of `texture2DArray` to
the more general `textureArray`. However, this call results in an error
when reading the compiled shader:
```
bgfx/src/renderer_gl.cpp:5904: BGFX Failed to compile shader.
0: 0(45) : error C1503: undefined variable "textureArray"
```
Defining this call to be `texture` avoids this error.
Fix case of drawing different offsets of indices of same vertex buffer
using same instance data.
This can happen in the case of conditionally drawing subsets of vertex
buffer stored in different offsets of the same index buffer while re-using
non-transient instance buffers.
