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render/vulkan: add Vulkan renderer

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This new renderer is implemented with the existing wlr_renderer API
(which is known to be sub-optimal for some operations). It's not
used by default, but users can opt-in by setting WLR_RENDERER=vulkan.

The renderer depends on VK_EXT_image_drm_format_modifier and
VK_EXT_physical_device_drm.

Co-authored-by: Simon Ser <contact@emersion.fr>
Co-authored-by: Jan Beich <jbeich@FreeBSD.org>
This commit is contained in:
nyorain 2021-02-21 18:30:12 +01:00 • committed by Simon Ser
parent 2edf468aeb
commit 8e34692250
21 changed files with 3704 additions and 2 deletions
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25
render/vulkan/shaders/texture.frag Normal file
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#version 450
layout(set = 0, binding = 0) uniform sampler2D tex;
layout(location = 0) in vec2 uv;
layout(location = 0) out vec4 out_color;
layout(push_constant) uniform UBO {
layout(offset = 80) float alpha;
} data;
void main() {
out_color = textureLod(tex, uv, 0);
// We expect this shader to output pre-alpha-multiplied color values.
// alpha < 0.0 means that this shader should ignore the texture's alpha
// value.
if (data.alpha < 0.0) {
out_color.a = -data.alpha;
out_color.rgb *= -data.alpha;
} else {
out_color *= data.alpha;
}
}