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[vulkan] Make lighting samplers configurable

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My VersaPro doesn't support more than 32 per-stage samplers (lavapipe).
This is a small part of getting Vulkan to run on lavapipe and even in
itself is rather incomplete.
This commit is contained in:
Bill Currie 2021-12-06 14:21:10 +09:00
parent 062f616548
commit a0c935e8bc
3 changed files with 19 additions and 5 deletions
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16
libs/video/renderer/vulkan/qfpipeline.plist
View file

@ -1,4 +1,10 @@
{
limits = {
//FIXME this really needs to be an external variable as the C code
//needs to agree on the size, so it might as well set maxSamplers
//directly (and any other such variable)
maxSamplers = "min (256u, $physDevLimits.maxPerStageDescriptorSamplers)";
};
samplers = {
quakepic = {
magFilter = nearest;
@ -120,7 +126,7 @@
bindings = (
{
type = combined_image_sampler;
descriptorCount = "$frames.size * 256z";
descriptorCount = "$frames.size * size_t($properties.limits.maxSamplers)";
},
);
};
@ -308,7 +314,7 @@
{
binding = 0;
descriptorType = combined_image_sampler;
descriptorCount = 256;
descriptorCount = $properties.limits.maxSamplers;
stageFlags = fragment;
},
);
@ -903,6 +909,12 @@
stage = fragment;
name = main;
module = $builtin/lighting.frag;
specializationInfo = {
mapEntries = (
{ size = 4; offset = 0; constantID = 0; },
);
data = "array($properties.limits.maxSamplers)";
};
},
);
vertexInput = $properties.fsquad.vertexInput;

4
libs/video/renderer/vulkan/shader/lighting.frag
View file

@ -14,8 +14,6 @@ struct LightData {
vec3 direction;
float cone;
};
//XXX can't include :( be sure to keep up to date with qf_lighting.h
#define MaxLights 256
#define StyleMask 0x07f
#define ModelMask 0x380
@ -33,6 +31,8 @@ struct LightData {
#define ST_CASCADE (2 << 10) // cascaded shadow maps
#define ST_CUBE (3 << 10) // cubemap (omni, large spotlight)
layout (constant_id = 0) const int MaxLights = 256;
layout (set = 2, binding = 0) uniform sampler2DArrayShadow shadowCascade[MaxLights];
layout (set = 2, binding = 0) uniform sampler2DShadow shadowPlane[MaxLights];
layout (set = 2, binding = 0) uniform samplerCubeShadow shadowCube[MaxLights];

4
libs/video/renderer/vulkan/vulkan_lighting.c
View file

@ -416,7 +416,9 @@ Vulkan_Lighting_Init (vulkan_ctx_t *ctx)
lframe->shadowWrite = base_image_write;
lframe->shadowWrite.dstSet = shadow_set->a[i];
lframe->shadowWrite.dstBinding = 0;
lframe->shadowWrite.descriptorCount = MaxLights;
lframe->shadowWrite.descriptorCount
= min (MaxLights,
device->physDev->properties.limits.maxPerStageDescriptorSamplers);
lframe->shadowWrite.pImageInfo = lframe->shadowInfo;
}
free (attach_set);