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[vulkan] Abandon light splats

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They were an interesting idea and might be useful in the future, but
they don't work as well as I had hoped for quake's maps due to the
overlapping light volumes causing contention while doing the additive
blends in the frame buffer. The cause was made obvious when testing in
the marcher map: most of its over 400 lights have infinite radius thus
require full screen passes: all those passes fighting for the frame
buffer did very nasty things to performance. However, light splats might be
useful for many small, non-overlapping light volumes, thus the code is
being kept (and I like the cleanups that came with it).
This commit is contained in:
Bill Currie 2023-06-28 13:19:10 +09:00
parent 49dab2af85
commit afa84afc79
3 changed files with 68 additions and 85 deletions
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34
libs/video/renderer/vulkan/rp_main_def.plist
View file

@ -560,6 +560,11 @@ properties = {
name = main; name = main;
module = $builtin/light_splat.frag; module = $builtin/light_splat.frag;
}; };
fragment = {
stage = fragment;
name = main;
module = $builtin/lighting.frag;
};
debug_fragment = { debug_fragment = {
stage = fragment; stage = fragment;
name = main; name = main;
@ -1439,45 +1444,26 @@ renderpasses = {
color = { color = {
light = { light = {
layout = color_attachment_optimal; layout = color_attachment_optimal;
blend = $additive_blend; blend = $blend_disable;
}; };
}; };
preserve = (output); preserve = (output);
}; };
pipelines = { pipelines = {
light_splats = { lights = {
@inherit = $compose_base; @inherit = $compose_base;
color = $color.lights; color = $color.lights;
tasks = ( tasks = (
{ func = lighting_update_descriptors; }, { func = lighting_update_descriptors; },
{ func = lighting_bind_descriptors; }, { func = lighting_bind_descriptors; },
{ func = lighting_draw_splats; }, { func = lighting_draw_lights; },
); );
stages = ( stages = (
$lighting.shader.vertex_splat, $fstriangle.shader.vertex,
$lighting.shader.fragment_splat, $lighting.shader.fragment,
); );
vertexInput = $lighting.vertexInput_splat;
inputAssembly = $lighting.inputAssembly;
layout = $lighting.layout;
rasterization = $cw_cull_back;
//depthStencil = $depth_disable;
};
light_flat = {
@inherit = $compose_base;
color = $color.lights;
tasks = (
{ func = lighting_draw_flats; },
);
stages = (
$lighting.shader.vertex_flat,
$lighting.shader.fragment_splat,
);
vertexInput = $lighting.vertexInput_flat;
layout = $lighting.layout; layout = $lighting.layout;
}; };
}; };

51
libs/video/renderer/vulkan/shader/lighting.frag
View file

@ -1,46 +1,17 @@
#version 450 #version 450
#extension GL_GOOGLE_include_directive : enable
layout (input_attachment_index = 0, set = 0, binding = 0) uniform subpassInput depth; #include "lighting.h"
layout (input_attachment_index = 1, set = 0, binding = 1) uniform subpassInput color;
layout (input_attachment_index = 2, set = 0, binding = 2) uniform subpassInput emission;
layout (input_attachment_index = 3, set = 0, binding = 3) uniform subpassInput normal;
layout (input_attachment_index = 4, set = 0, binding = 4) uniform subpassInput position;
struct LightData { layout (input_attachment_index = 0, set = 2, binding = 0) uniform subpassInput depth;
vec4 color; // .a is intensity layout (input_attachment_index = 1, set = 2, binding = 1) uniform subpassInput color;
vec4 position; // .w = 0 -> directional, .w = 1 -> point/cone layout (input_attachment_index = 2, set = 2, binding = 2) uniform subpassInput emission;
vec4 direction; // .w = -cos(cone_angle/2) (1 for omni/dir) layout (input_attachment_index = 3, set = 2, binding = 3) uniform subpassInput normal;
vec4 attenuation; layout (input_attachment_index = 4, set = 2, binding = 4) uniform subpassInput position;
};
#define StyleMask 0x07f layout (set = 3, binding = 0) uniform sampler2DArrayShadow shadowCascade[MaxLights];
#define ModelMask 0x380 layout (set = 3, binding = 0) uniform sampler2DShadow shadowPlane[MaxLights];
#define ShadowMask 0xc00 layout (set = 3, binding = 0) uniform samplerCubeShadow shadowCube[MaxLights];
#define LM_LINEAR (0 << 7) // light - dist (or radius + dist if -ve)
#define LM_INVERSE (1 << 7) // distFactor1 * light / dist
#define LM_INVERSE2 (2 << 7) // distFactor2 * light / (dist * dist)
#define LM_INFINITE (3 << 7) // light
#define LM_AMBIENT (4 << 7) // light
#define LM_INVERSE3 (5 << 7) // distFactor2 * light / (dist + distFactor2)**2
#define ST_NONE (0 << 10) // no shadows
#define ST_PLANE (1 << 10) // single plane shadow map (small spotlight)
#define ST_CASCADE (2 << 10) // cascaded shadow maps
#define ST_CUBE (3 << 10) // cubemap (omni, large spotlight)
layout (constant_id = 0) const int MaxLights = 768;
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];
layout (set = 1, binding = 0) uniform Lights {
LightData lights[MaxLights];
int lightCount;
//mat4 shadowMat[MaxLights];
//vec4 shadowCascale[MaxLights];
};
layout (location = 0) out vec4 frag_color; layout (location = 0) out vec4 frag_color;
@ -118,5 +89,5 @@ main (void)
} }
//light = max (light, minLight); //light = max (light, minLight);
frag_color = vec4 (c * light + e, 1); frag_color = vec4 (light, 1);
} }

68
libs/video/renderer/vulkan/vulkan_lighting.c
View file

@ -248,19 +248,20 @@ lighting_update_lights (const exprval_t **params, exprval_t *result,
QFV_PacketCopyBuffer (packet, lframe->data_buffer, 0, QFV_PacketCopyBuffer (packet, lframe->data_buffer, 0,
&bufferBarriers[qfv_BB_TransferWrite_to_UniformRead]); &bufferBarriers[qfv_BB_TransferWrite_to_UniformRead]);
QFV_PacketSubmit (packet); QFV_PacketSubmit (packet);
if (0) {
packet = QFV_PacketAcquire (ctx->staging); packet = QFV_PacketAcquire (ctx->staging);
uint32_t id_count = lframe->ico_count + lframe->cone_count uint32_t id_count = lframe->ico_count + lframe->cone_count
+ lframe->flat_count; + lframe->flat_count;
uint32_t *ids = QFV_PacketExtend (packet, id_count * sizeof (uint32_t)); uint32_t *ids = QFV_PacketExtend (packet, id_count * sizeof (uint32_t));
memcpy (ids, ico_ids, lframe->ico_count * sizeof (uint32_t)); memcpy (ids, ico_ids, lframe->ico_count * sizeof (uint32_t));
ids += lframe->ico_count; ids += lframe->ico_count;
memcpy (ids, cone_ids, lframe->cone_count * sizeof (uint32_t)); memcpy (ids, cone_ids, lframe->cone_count * sizeof (uint32_t));
ids += lframe->cone_count; ids += lframe->cone_count;
memcpy (ids, flat_ids, lframe->flat_count * sizeof (uint32_t)); memcpy (ids, flat_ids, lframe->flat_count * sizeof (uint32_t));
QFV_PacketCopyBuffer (packet, lframe->id_buffer, 0, QFV_PacketCopyBuffer (packet, lframe->id_buffer, 0,
&bufferBarriers[qfv_BB_TransferWrite_to_IndexRead]); &bufferBarriers[qfv_BB_TransferWrite_to_IndexRead]);
QFV_PacketSubmit (packet); QFV_PacketSubmit (packet);
}
} }
static VkDescriptorBufferInfo base_buffer_info = { static VkDescriptorBufferInfo base_buffer_info = {
@ -334,15 +335,16 @@ lighting_bind_descriptors (const exprval_t **params, exprval_t *result,
}; };
dfunc->vkCmdBindDescriptorSets (cmd, VK_PIPELINE_BIND_POINT_GRAPHICS, dfunc->vkCmdBindDescriptorSets (cmd, VK_PIPELINE_BIND_POINT_GRAPHICS,
layout, 0, 3, sets, 0, 0); layout, 0, 3, sets, 0, 0);
if (0) {
VkBuffer buffers[] = { VkBuffer buffers[] = {
lframe->id_buffer, lframe->id_buffer,
lctx->splat_verts, lctx->splat_verts,
}; };
VkDeviceSize offsets[] = { 0, 0 }; VkDeviceSize offsets[] = { 0, 0 };
dfunc->vkCmdBindVertexBuffers (cmd, 0, 2, buffers, offsets); dfunc->vkCmdBindVertexBuffers (cmd, 0, 2, buffers, offsets);
dfunc->vkCmdBindIndexBuffer (cmd, lctx->splat_inds, 0, dfunc->vkCmdBindIndexBuffer (cmd, lctx->splat_inds, 0,
VK_INDEX_TYPE_UINT32); VK_INDEX_TYPE_UINT32);
}
} }
static void static void
@ -386,6 +388,25 @@ lighting_draw_flats (const exprval_t **params, exprval_t *result,
dfunc->vkCmdDraw (cmd, 3, lframe->flat_count, 0, splat_count); dfunc->vkCmdDraw (cmd, 3, lframe->flat_count, 0, splat_count);
} }
static void
lighting_draw_lights (const exprval_t **params, exprval_t *result,
exprctx_t *ectx)
{
auto taskctx = (qfv_taskctx_t *) ectx;
auto ctx = taskctx->ctx;
auto device = ctx->device;
auto dfunc = device->funcs;
auto lctx = ctx->lighting_context;
auto cmd = taskctx->cmd;
auto lframe = &lctx->frames.a[ctx->curFrame];
if (!(lframe->ico_count + lframe->cone_count + lframe->flat_count)) {
return;
}
dfunc->vkCmdDraw (cmd, 3, 1, 0, 0);
}
static exprfunc_t lighting_update_lights_func[] = { static exprfunc_t lighting_update_lights_func[] = {
{ .func = lighting_update_lights }, { .func = lighting_update_lights },
{} {}
@ -406,6 +427,10 @@ static exprfunc_t lighting_draw_flats_func[] = {
{ .func = lighting_draw_flats }, { .func = lighting_draw_flats },
{} {}
}; };
static exprfunc_t lighting_draw_lights_func[] = {
{ .func = lighting_draw_lights },
{}
};
static exprsym_t lighting_task_syms[] = { static exprsym_t lighting_task_syms[] = {
{ "lighting_update_lights", &cexpr_function, lighting_update_lights_func }, { "lighting_update_lights", &cexpr_function, lighting_update_lights_func },
{ "lighting_update_descriptors", &cexpr_function, { "lighting_update_descriptors", &cexpr_function,
@ -414,6 +439,7 @@ static exprsym_t lighting_task_syms[] = {
lighting_bind_descriptors_func }, lighting_bind_descriptors_func },
{ "lighting_draw_splats", &cexpr_function, lighting_draw_splats_func }, { "lighting_draw_splats", &cexpr_function, lighting_draw_splats_func },
{ "lighting_draw_flats", &cexpr_function, lighting_draw_flats_func }, { "lighting_draw_flats", &cexpr_function, lighting_draw_flats_func },
{ "lighting_draw_lights", &cexpr_function, lighting_draw_lights_func },
{} {}
}; };