shaders

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Hash : 98496cab
Author :
Date : 2020-05-28T15:02:43

Fix float to int copy in VK backend

This fixes WebGL tests on Vulkan (e.g. SwiftShaderVK) that copy from the
canvas (GL_RGBA8) to an integer format target texture, such as:
conformance2/textures/canvas_sub_rectangle/tex-2d-rg8ui-rg_integer-unsigned_byte.html
The sampled normalized value needs to be scaled up by 255.

Also fixes angle_end2end test CopyTextureTestES3.ES3UintFormats on
Vulkan.

Bug: b/156399229
Bug: angleproject:4092
Change-Id: I18d46bc4453fdc500caca96ca3a12fe93290b10c
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2219142
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>

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Git HTTP	https://git.kmx.io/kc3-lang/angle.git
Git SSH	git@git.kmx.io:kc3-lang/angle.git
Public access ?	public
Description	A conformant OpenGL ES implementation for Windows, Mac, Linux, iOS and Android. Homepage Github
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README.md
Shader Variations

To build multiple variations of a shader, add a file named X.json corresponding to shader file X. A variation is generated by building the shader with different definitions (a la glslang_validator’s -DName=1). These definitions come from flags and enumerations defined in the json file. Without a .json file, the shader is generated as is (1 variation).

There are multiple possible fields in the json file:
- “Description”: This contains the license and other comments, which will be ignored.
- “Flags”: this is a list of flags. Each flag FLAG defines a shader variation with or without the define FLAG=1.
- other: any other field is a similar list to flags, except that each entry in this enumeration is a variation. Similar to “flags”, every entry ENTRY results in an ENTRY=1 define.
Flags are shorthand for 2-entry enumerations. Given n flags, there are 2^n variations where every flag is either present or not. For enumerations, only one entry is active in any variation. Thus, an enumeration with n entries generates n variations.

Example

Here is an example json file:

{
```
"Description": [
    "Copyright 2018 The ANGLE Project Authors. All rights reserved.",
    "Use of this source code is governed by a BSD-style license that can be",
    "found in the LICENSE file.",
    "",
    "RayTrace.comp.json: Build parameters for RayTrace.comp."
],
"Flags": [
    "NanFilter",
    "WorkaroundIntelBug"
],
"RayTraceQuality": [
    "IsRTLowRes",
    "IsRTHighRes",
    "IsRTAwesome"
],
"ImageType": [
    "IsR",
    "IsRG",
    "IsRGB",
    "IsRGBA"
]
```
}

This will generate 2^2 3 4 shaders.

kc3-lang/angle/src/libANGLE/renderer/vulkan/shaders

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README.md

Shader Variations

Example