This reverts commit e061cb4437.
This function is problematic on some operating systems.
# Conflicts:
# source/blender/draw/intern/draw_manager.c
# source/blender/gpu/GPU_texture.h
# source/blender/gpu/intern/gpu_texture.c
Pre-calculates values needed for unprojecting to avoid
a matrix invert and extracting projection matrix dimensions for
every call to GPU_matrix_unproject.
Use for gizmo selection drawing.
Migrate old legacy code to the draw mamager/object mode. The old legacy
version did not work with wireframe. By migrating the code
to modern draw manager code we have mode control on the drawing process.
Still background images do not work with OIT, the cause seems to be that the transparent pixels are treated as background pixels.
Also There are some artifacts when working with Holdouts and DoF, this
is because the draw engines do not pass the correct alpha values.
Reviewers: fclem, brecht
Differential Revision: https://developer.blender.org/D4638
Use depth buffer to order the uv edges correctly to always draw selected
edges on top.
We still use the double drawing workaround for points to keep the smooth
antialiased display.
The issue was caused by a bad usage of GPUOffscreen.
The Framebuffer was created using a window framebuffer and used
in a viewport callback when another GPUContext was bound.
This change allows up to 3 framebuffers per GPUOffscreen.
Most common case will be using 2 framebuffers (one for init and
one for drawing) but in the case of more (bad usage) it will just
degrade performance a bit.
Now texture storage of images is defined by the alpha mode of the image. The
downside of this is that there can be artifacts near alpha edges where pixels
with zero alpha bleed in. It also adds more code complexity since image textures
are no longer all stored the same way.
This changes allows us to keep using sRGB texture formats, which have edge
darkening when stored with premultiplied alpha. Game engines seems to generally
do the same thing, and we want to be compatible with them.
This is a mix of solutions rBe60b18d51d58 and rB52af5fa31fbc.
What happened was that when a node of the BVH gets 0 vertices, the batch is untouched and therefore still drawn.
In the Intel HD 4000 driver a shader has to be deleted in the same context in which it is created.
However, because you can't use a rendering context on different threads, to maintain the multithreaded compilation, the solution was to use the `GL_ARB_get_program_binary` and copy the binary generated for the shader and generate a shader on the main context using that binary.
This solution is limited only to Intel HD 4000 and windows.
Reviewers: fclem
Reviewed By: fclem
Differential Revision: https://developer.blender.org/D5019
For offscreen rendering a high definition color buffer is needed.
Without it there are banding issues when doing multi-sampling viewport
rendering.
Reviewed By: fclem
Maniphest Tasks: T65287
Differential Revision: https://developer.blender.org/D5009
Restart index can have been changed in another context and the static
var can get out of sync. A better solution is to set the restart index
when binding the VAO. It also have less perf impact.
Fix T65364 Corrupted mesh display on macOS
This type of indices is not natively supported on modern GPU and
gives warning on some implementation. The memory savings it
provides is also quite minimal and unlikely to be visible on
nowadays hardware.
This remove some uneeded struct members and makes primitive
restart always enabled by default. This can be broken by addons
if they are not careful enough but many other states have this
problem.
Also leverage GL_PRIMITIVE_RESTART_FIXED_INDEX if
ARB_ES3_compatibility is supported. This removes all API calls
to change restart index depending on indices length.
This will have multiple benefit.
TODO detail benefits (culling, more explicit, handling of clipping planes)
For now the view usage is wrapped to make changes needed more progressive.
On Windows 10 with a post Februari 2019 Intel driver, the box selection
is not working. It only detects the object centers, but not the drawn
triangles of the basic engine.
Reviewed By: fclem
Maniphest Tasks: T62947
Differential Revision: https://developer.blender.org/D4857
