Pretty sure source/blender is now finished, with all legacy matrix calls confined to gpu_matrix.c.
This was the easy part, but doing it first makes the next part much easier. TODO and XXX notes describe what is left.
glMatrixMode is still in place, since the new API does not share this concept of modes. Similar for glOrtho and glFrustum which I'll tackle very soon.
Part of T49450
For functions that expect a 4x4 matrix, you can pass in that, or array[16], or float*, or... Casting at each call site can get annoying, and obscures the logic.
The C11 section still needs work, but the non-C11 macros help on the system I tested on (Mac/clang).
Part of T49450
This is used to send latest matrix values to shader when drawing.
Previously handled by calling OpenGL matrix functions, followed by gpuMatrixUpdate_legacy. With this change that function is no longer needed.
Part of T49450
For the sake of forward progress on T49450
We can now replace legacy gl* matrix function calls with their gpu equivalents. "Inactive" in this code means we're using the legacy matrix stacks, not our own. Setting up the proper gpuMatrixBegin2D/3D/End calls can be done afterward.
Most or all of this will be removed after the transition to core profile.
We render selected meshes into another buffer and use a screen space shader to expand the color out of the mesh silouhette.
Pros: only one additionnal render pass is needed (like old outline code), and we have occluded informations.
Cons: memory usage is a problem. This method needs 2 color buffer to ping pong when expanding the outline and 1 depth buffer to test occluded fragments. This gives a 88 bits/pix memory footprint.
Idea: Since we don't need all color range but only some uniform colors (theme colors) we could manipulate only the color ID instead of the whole color this could cut the color buffer size and lower the memory footprint to 58 bits/pix.
It also adds nice occluded silouhette information for selected objects that are behind visible objects.
This methods is really heavy because it needs to render the wires twices.
NOTE: This is really a backend-only implementation, nothing is changed in the UI
Adds a tab button-type and the basic drawing and handling code for it.
More work needs to be done on it, but idea is to get in ready for usage in the
topbar.
Differential Revision: https://developer.blender.org/D1371
