Commit Graph

5 Commits

Author SHA1 Message Date
Laszlo Agocs
058c52fc2a rhi: Improve base vertex/instance support
Have feature flags as appropriate. OpenGL is causing a mess here
but let's support what we can since some of this will become relevant
in more sophisticated mesh drawing cases with 3D in particular.

Change-Id: Idfa7b4642ec87147978e03d78d6233efbd151491
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2019-07-01 17:34:47 +02:00
Laszlo Agocs
9452c963c8 rhi: Add a test for instancing
Draws 1024 cubes at random x,y positions with varying color with
a single instanced draw call.

Change-Id: I8737503acf23866ad4734b1d88753415a3b93445
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2019-07-01 17:34:40 +02:00
Laszlo Agocs
854ddb0301 rhi: Enhance line width and point size support
...but this will vary between backends, or in some cases
even between implementations of the same API.

Point size is settable only via the vertex shader (gl_PointSize).
It is silently ignored with D3D and HLSL.

Line widths other than 1 are supported only on OpenGL and Vulkan.
(but this is in fact deprecated with GL and optional with Vulkan)

Add QRhi::Feature values for both.

The line width is now settable on QRhiGraphicsPipeline. It is not a
dynamic state since the static, per-pipeline width is good enough for
most cases. (and the feature is not supported on half of the backends
anyways so it will get limited use in practice).

Change-Id: I6d3a32269527c452b794b2cb8b0f03101eab40b2
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2019-07-01 17:34:29 +02:00
Laszlo Agocs
6f4aa54131 rhi: Add compute api and implement for Vulkan and Metal
D3D11 and GL (4.3+, ES 3.1+) will come separately at a
later time.

Change-Id: If30f2f3d062fa27e57e9912674669225b82a7b93
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2019-06-17 10:32:57 +02:00
Laszlo Agocs
53599592e0 Introduce the Qt graphics abstraction as private QtGui helpers
Comes with backends for Vulkan, Metal, Direct3D 11.1, and OpenGL (ES).

All APIs are private for now.

Shader conditioning (i.e. generating a QRhiShader in memory or on disk
from some shader source code) is done via the tools and APIs provided
by qt-labs/qtshadertools.

The OpenGL support follows the cross-platform tradition of requiring
ES 2.0 only, while optionally using some (ES) 3.x features. It can
operate in core profile contexts as well.

Task-number: QTBUG-70287
Change-Id: I246f2e36d562e404012c05db2aa72487108aa7cc
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2019-06-13 10:13:45 +02:00