quakeforge/libs/video/renderer/vulkan/vulkan_lighting.c

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/*
vulkan_lighting.c
Vulkan lighting pass pipeline
Copyright (C) 2021 Bill Currie <bill@taniwha.org>
Author: Bill Currie <bill@taniwha.org>
Date: 2021/2/23
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <stdlib.h>
#include "qfalloca.h"
#include "QF/cvar.h"
#include "QF/dstring.h"
#include "QF/heapsort.h"
#include "QF/plist.h"
#include "QF/progs.h"
#include "QF/script.h"
#include "QF/set.h"
#include "QF/sys.h"
#include "QF/va.h"
#include "QF/scene/scene.h"
#include "QF/ui/view.h"
#include "QF/Vulkan/qf_draw.h"
#include "QF/Vulkan/qf_lighting.h"
#include "QF/Vulkan/qf_texture.h"
#include "QF/Vulkan/barrier.h"
#include "QF/Vulkan/buffer.h"
#include "QF/Vulkan/debug.h"
#include "QF/Vulkan/descriptor.h"
#include "QF/Vulkan/device.h"
#include "QF/Vulkan/image.h"
#include "QF/Vulkan/instance.h"
#include "QF/Vulkan/projection.h"
#include "QF/Vulkan/renderpass.h"
#include "QF/Vulkan/staging.h"
#include "compat.h"
#include "r_internal.h"
#include "vid_vulkan.h"
static void
update_lights (vulkan_ctx_t *ctx)
{
qfv_device_t *device = ctx->device;
qfv_devfuncs_t *dfunc = device->funcs;
lightingctx_t *lctx = ctx->lighting_context;
lightingdata_t *ldata = lctx->ldata;
lightingframe_t *lframe = &lctx->frames.a[ctx->curFrame];
Light_FindVisibleLights (ldata);
dlight_t *lights[MaxLights];
qfv_packet_t *packet = QFV_PacketAcquire (ctx->staging);
qfv_light_buffer_t *light_data = QFV_PacketExtend (packet,
sizeof (*light_data));
float style_intensities[NumStyles];
for (int i = 0; i < NumStyles; i++) {
style_intensities[i] = d_lightstylevalue[i] / 65536.0;
}
light_data->lightCount = 0;
R_FindNearLights (r_refdef.frame.position, MaxLights - 1, lights);
for (int i = 0; i < MaxLights - 1; i++) {
if (!lights[i]) {
break;
}
light_data->lightCount++;
VectorCopy (lights[i]->color, light_data->lights[i].color);
// dynamic lights seem a tad faint, so 16x map lights
light_data->lights[i].color[3] = lights[i]->radius / 16;
VectorCopy (lights[i]->origin, light_data->lights[i].position);
// dlights are local point sources
light_data->lights[i].position[3] = 1;
light_data->lights[i].attenuation =
(vec4f_t) { 0, 0, 1, 1/lights[i]->radius };
// full sphere, normal light (not ambient)
light_data->lights[i].direction = (vec4f_t) { 0, 0, 1, 1 };
}
for (size_t i = 0; (i < ldata->lightvis.size
&& light_data->lightCount < MaxLights); i++) {
if (ldata->lightvis.a[i]) {
light_t *light = &light_data->lights[light_data->lightCount++];
*light = ldata->lights.a[i];
light->color[3] *= style_intensities[ldata->lightstyles.a[i]];
}
}
if (developer & SYS_lighting) {
Vulkan_Draw_String (vid.conview->xlen - 32, 8,
va (ctx->va_ctx, "%3d", light_data->lightCount),
ctx);
}
qfv_bufferbarrier_t bb = bufferBarriers[qfv_BB_Unknown_to_TransferWrite];
bb.barrier.buffer = lframe->light_buffer;
bb.barrier.size = sizeof (qfv_light_buffer_t);
dfunc->vkCmdPipelineBarrier (packet->cmd, bb.srcStages, bb.dstStages,
0, 0, 0, 1, &bb.barrier, 0, 0);
VkBufferCopy copy_region[] = {
{ packet->offset, 0, sizeof (qfv_light_buffer_t) },
};
dfunc->vkCmdCopyBuffer (packet->cmd, ctx->staging->buffer,
lframe->light_buffer, 1, &copy_region[0]);
bb = bufferBarriers[qfv_BB_TransferWrite_to_UniformRead];
bb.barrier.buffer = lframe->light_buffer;
bb.barrier.size = sizeof (qfv_light_buffer_t);
dfunc->vkCmdPipelineBarrier (packet->cmd, bb.srcStages, bb.dstStages,
0, 0, 0, 1, &bb.barrier, 0, 0);
QFV_PacketSubmit (packet);
}
void
Vulkan_Lighting_Draw (qfv_renderframe_t *rFrame)
{
vulkan_ctx_t *ctx = rFrame->vulkan_ctx;
qfv_device_t *device = ctx->device;
qfv_devfuncs_t *dfunc = device->funcs;
qfv_renderpass_t *renderpass = rFrame->renderpass;
lightingctx_t *lctx = ctx->lighting_context;
if (!lctx->scene) {
return;
}
if (lctx->scene->lights) {
update_lights (ctx);
}
__auto_type cframe = &ctx->frames.a[ctx->curFrame];
lightingframe_t *lframe = &lctx->frames.a[ctx->curFrame];
VkCommandBuffer cmd = lframe->cmd;
DARRAY_APPEND (&rFrame->subpassCmdSets[QFV_passLighting], cmd);
dfunc->vkResetCommandBuffer (cmd, 0);
VkCommandBufferInheritanceInfo inherit = {
VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_INFO, 0,
renderpass->renderpass, QFV_passLighting,
cframe->framebuffer,
0, 0, 0,
};
VkCommandBufferBeginInfo beginInfo = {
VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO, 0,
VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT
| VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT, &inherit,
};
dfunc->vkBeginCommandBuffer (cmd, &beginInfo);
QFV_duCmdBeginLabel (device, cmd, "lighting", { 0.6, 0.5, 0.6, 1});
dfunc->vkCmdBindPipeline (cmd, VK_PIPELINE_BIND_POINT_GRAPHICS,
lctx->pipeline);
lframe->bufferInfo[0].buffer = lframe->light_buffer;
lframe->attachInfo[0].imageView
= renderpass->attachment_views->a[QFV_attachDepth];
lframe->attachInfo[1].imageView
= renderpass->attachment_views->a[QFV_attachColor];
lframe->attachInfo[2].imageView
= renderpass->attachment_views->a[QFV_attachEmission];
lframe->attachInfo[3].imageView
= renderpass->attachment_views->a[QFV_attachNormal];
lframe->attachInfo[4].imageView
= renderpass->attachment_views->a[QFV_attachPosition];
dfunc->vkUpdateDescriptorSets (device->dev,
LIGHTING_DESCRIPTORS,
lframe->descriptors, 0, 0);
VkDescriptorSet sets[] = {
lframe->attachWrite[0].dstSet,
lframe->bufferWrite[0].dstSet,
lframe->shadowWrite.dstSet,
};
dfunc->vkCmdBindDescriptorSets (cmd, VK_PIPELINE_BIND_POINT_GRAPHICS,
lctx->layout, 0, 3, sets, 0, 0);
dfunc->vkCmdSetViewport (cmd, 0, 1, &rFrame->renderpass->viewport);
dfunc->vkCmdSetScissor (cmd, 0, 1, &rFrame->renderpass->scissor);
dfunc->vkCmdDraw (cmd, 3, 1, 0, 0);
QFV_duCmdEndLabel (device, cmd);
dfunc->vkEndCommandBuffer (cmd);
}
static VkDescriptorBufferInfo base_buffer_info = {
0, 0, VK_WHOLE_SIZE
};
static VkDescriptorImageInfo base_image_info = {
0, 0, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL
};
static VkWriteDescriptorSet base_buffer_write = {
VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET, 0, 0,
0, 0, 1,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
0, 0, 0
};
static VkWriteDescriptorSet base_attachment_write = {
VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET, 0, 0,
0, 0, 1,
VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT,
0, 0, 0
};
static VkWriteDescriptorSet base_image_write = {
VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET, 0, 0,
0, 0, 1,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
0, 0, 0
};
void
Vulkan_Lighting_Init (vulkan_ctx_t *ctx)
{
qfv_device_t *device = ctx->device;
qfv_devfuncs_t *dfunc = device->funcs;
qfvPushDebug (ctx, "lighting init");
lightingctx_t *lctx = calloc (1, sizeof (lightingctx_t));
ctx->lighting_context = lctx;
DARRAY_INIT (&lctx->lightmats, 16);
DARRAY_INIT (&lctx->lightlayers, 16);
DARRAY_INIT (&lctx->lightimages, 16);
DARRAY_INIT (&lctx->lightviews, 16);
size_t frames = ctx->frames.size;
DARRAY_INIT (&lctx->frames, frames);
DARRAY_RESIZE (&lctx->frames, frames);
lctx->frames.grow = 0;
lctx->pipeline = Vulkan_CreateGraphicsPipeline (ctx, "lighting");
lctx->layout = Vulkan_CreatePipelineLayout (ctx, "lighting_layout");
lctx->sampler = Vulkan_CreateSampler (ctx, "shadow_sampler");
__auto_type lbuffers = QFV_AllocBufferSet (frames, alloca);
for (size_t i = 0; i < frames; i++) {
lbuffers->a[i] = QFV_CreateBuffer (device, sizeof (qfv_light_buffer_t),
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT
| VK_BUFFER_USAGE_TRANSFER_DST_BIT);
QFV_duSetObjectName (device, VK_OBJECT_TYPE_BUFFER,
lbuffers->a[i],
va (ctx->va_ctx, "buffer:lighting:%zd", i));
}
VkMemoryRequirements requirements;
dfunc->vkGetBufferMemoryRequirements (device->dev, lbuffers->a[0],
&requirements);
size_t light_size = QFV_NextOffset (requirements.size, &requirements);
lctx->light_memory = QFV_AllocBufferMemory (device, lbuffers->a[0],
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
frames * light_size, 0);
QFV_duSetObjectName (device, VK_OBJECT_TYPE_DEVICE_MEMORY,
lctx->light_memory, "memory:lighting");
__auto_type cmdSet = QFV_AllocCommandBufferSet (1, alloca);
__auto_type attach = QFV_AllocDescriptorSetLayoutSet (frames, alloca);
__auto_type lights = QFV_AllocDescriptorSetLayoutSet (frames, alloca);
__auto_type shadow = QFV_AllocDescriptorSetLayoutSet (frames, alloca);
for (size_t i = 0; i < frames; i++) {
attach->a[i] = Vulkan_CreateDescriptorSetLayout (ctx,
"lighting_attach");
lights->a[i] = Vulkan_CreateDescriptorSetLayout (ctx,
"lighting_lights");
shadow->a[i] = Vulkan_CreateDescriptorSetLayout (ctx,
"lighting_shadow");
}
__auto_type attach_pool = Vulkan_CreateDescriptorPool (ctx,
"lighting_attach_pool");
__auto_type lights_pool = Vulkan_CreateDescriptorPool (ctx,
"lighting_lights_pool");
__auto_type shadow_pool = Vulkan_CreateDescriptorPool (ctx,
"lighting_shadow_pool");
__auto_type attach_set = QFV_AllocateDescriptorSet (device, attach_pool,
attach);
__auto_type lights_set = QFV_AllocateDescriptorSet (device, lights_pool,
lights);
__auto_type shadow_set = QFV_AllocateDescriptorSet (device, shadow_pool,
shadow);
VkDeviceSize light_offset = 0;
for (size_t i = 0; i < frames; i++) {
__auto_type lframe = &lctx->frames.a[i];
QFV_duSetObjectName (device, VK_OBJECT_TYPE_DESCRIPTOR_SET,
attach_set->a[i],
va (ctx->va_ctx, "lighting:attach_set:%zd", i));
QFV_duSetObjectName (device, VK_OBJECT_TYPE_DESCRIPTOR_SET,
lights_set->a[i],
va (ctx->va_ctx, "lighting:lights_set:%zd", i));
QFV_duSetObjectName (device, VK_OBJECT_TYPE_DESCRIPTOR_SET,
shadow_set->a[i],
va (ctx->va_ctx, "lighting:shadow_set:%zd", i));
QFV_AllocateCommandBuffers (device, ctx->cmdpool, 1, cmdSet);
lframe->cmd = cmdSet->a[0];
lframe->light_buffer = lbuffers->a[i];
QFV_BindBufferMemory (device, lbuffers->a[i], lctx->light_memory,
light_offset);
light_offset += light_size;
QFV_duSetObjectName (device, VK_OBJECT_TYPE_COMMAND_BUFFER,
lframe->cmd, "cmd:lighting");
for (int j = 0; j < LIGHTING_BUFFER_INFOS; j++) {
lframe->bufferInfo[j] = base_buffer_info;
lframe->bufferWrite[j] = base_buffer_write;
lframe->bufferWrite[j].dstSet = lights_set->a[i];
lframe->bufferWrite[j].dstBinding = j;
lframe->bufferWrite[j].pBufferInfo = &lframe->bufferInfo[j];
}
for (int j = 0; j < LIGHTING_ATTACH_INFOS; j++) {
lframe->attachInfo[j] = base_image_info;
lframe->attachInfo[j].sampler = 0;
lframe->attachWrite[j] = base_attachment_write;
lframe->attachWrite[j].dstSet = attach_set->a[i];
lframe->attachWrite[j].dstBinding = j;
lframe->attachWrite[j].pImageInfo = &lframe->attachInfo[j];
}
for (int j = 0; j < LIGHTING_SHADOW_INFOS; j++) {
lframe->shadowInfo[j] = base_image_info;
lframe->shadowInfo[j].sampler = lctx->sampler;
lframe->shadowInfo[j].imageView = ctx->default_black->view;
}
lframe->shadowWrite = base_image_write;
lframe->shadowWrite.dstSet = shadow_set->a[i];
lframe->shadowWrite.dstBinding = 0;
lframe->shadowWrite.descriptorCount
= min (MaxLights,
device->physDev->properties.limits.maxPerStageDescriptorSamplers);
lframe->shadowWrite.pImageInfo = lframe->shadowInfo;
}
free (shadow_set);
free (attach_set);
free (lights_set);
qfvPopDebug (ctx);
}
static void
clear_shadows (vulkan_ctx_t *ctx)
{
qfv_device_t *device = ctx->device;
qfv_devfuncs_t *dfunc = device->funcs;
lightingctx_t *lctx = ctx->lighting_context;
if (lctx->shadow_memory) {
dfunc->vkFreeMemory (device->dev, lctx->shadow_memory, 0);
lctx->shadow_memory = 0;
}
for (size_t i = 0; i < lctx->lightviews.size; i++) {
dfunc->vkDestroyImageView (device->dev, lctx->lightviews.a[i], 0);
}
for (size_t i = 0; i < lctx->lightimages.size; i++) {
dfunc->vkDestroyImage (device->dev, lctx->lightimages.a[i], 0);
}
lctx->lightimages.size = 0;
lctx->lightviews.size = 0;
}
void
Vulkan_Lighting_Shutdown (vulkan_ctx_t *ctx)
{
qfv_device_t *device = ctx->device;
qfv_devfuncs_t *dfunc = device->funcs;
lightingctx_t *lctx = ctx->lighting_context;
clear_shadows (ctx);
for (size_t i = 0; i < lctx->frames.size; i++) {
lightingframe_t *lframe = &lctx->frames.a[i];
dfunc->vkDestroyBuffer (device->dev, lframe->light_buffer, 0);
}
dfunc->vkFreeMemory (device->dev, lctx->light_memory, 0);
dfunc->vkDestroyPipeline (device->dev, lctx->pipeline, 0);
DARRAY_CLEAR (&lctx->lightmats);
DARRAY_CLEAR (&lctx->lightimages);
DARRAY_CLEAR (&lctx->lightlayers);
DARRAY_CLEAR (&lctx->lightviews);
free (lctx->frames.a);
free (lctx);
}
static vec4f_t ref_direction = { 0, 0, 1, 0 };
static void
create_light_matrices (lightingctx_t *lctx)
{
lightingdata_t *ldata = lctx->ldata;
DARRAY_RESIZE (&lctx->lightmats, ldata->lights.size);
for (size_t i = 0; i < ldata->lights.size; i++) {
light_t *light = &ldata->lights.a[i];
mat4f_t view;
mat4f_t proj;
int mode = ST_NONE;
if (!light->position[3]) {
mode = ST_CASCADE;
} else {
if (light->direction[3] > -0.5) {
mode = ST_CUBE;
} else {
mode = ST_PLANE;
}
}
switch (mode) {
default:
case ST_NONE:
case ST_CUBE:
mat4fidentity (view);
break;
case ST_CASCADE:
case ST_PLANE:
(void)0;//FIXME for clang
//FIXME will fail for -ref_direction
vec4f_t dir = light->direction;
dir[3] = 0;
mat4fquat (view, qrotf (dir, ref_direction));
break;
}
VectorNegate (light->position, view[3]);
switch (mode) {
case ST_NONE:
mat4fidentity (proj);
break;
case ST_CUBE:
QFV_PerspectiveTan (proj, 1, 1);
break;
case ST_CASCADE:
// dependent on view fustrum and cascade level
mat4fidentity (proj);
break;
case ST_PLANE:
QFV_PerspectiveCos (proj, -light->direction[3]);
break;
}
mmulf (lctx->lightmats.a[i], proj, view);
}
}
static int
light_compare (const void *_li2, const void *_li1, void *_ldata)
{
const int *li1 = _li1;
const int *li2 = _li2;
lightingdata_t *ldata = _ldata;
const light_t *l1 = &ldata->lights.a[*li1];
const light_t *l2 = &ldata->lights.a[*li2];
int s1 = abs ((int) l1->color[3]);
int s2 = abs ((int) l2->color[3]);
if (s1 == s2) {
return (l1->position[3] == l2->position[3])
&& (l1->direction[3] > -0.5) == (l2->direction[3] > -0.5);
}
return s1 - s2;
}
static VkImage
create_map (int size, int layers, int cube, vulkan_ctx_t *ctx)
{
qfv_device_t *device = ctx->device;
qfv_devfuncs_t *dfunc = device->funcs;
if (layers < 6) {
cube = 0;
}
VkImageCreateInfo createInfo = {
VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO, 0,
cube ? VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT : 0, VK_IMAGE_TYPE_2D,
VK_FORMAT_X8_D24_UNORM_PACK32,
{ size, size, 1 }, 1, layers,
VK_SAMPLE_COUNT_1_BIT, VK_IMAGE_TILING_OPTIMAL,
VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT
| VK_IMAGE_USAGE_SAMPLED_BIT, VK_SHARING_MODE_EXCLUSIVE,
0, 0,
VK_IMAGE_LAYOUT_UNDEFINED,
};
VkImage image;
dfunc->vkCreateImage (device->dev, &createInfo, 0, &image);
QFV_duSetObjectName (device, VK_OBJECT_TYPE_IMAGE, image,
va (ctx->va_ctx, "image:shadowmap:%d:%d",
size, layers));
return image;
}
static VkImageView
create_view (VkImage image, int baseLayer, int mode, int id, vulkan_ctx_t *ctx)
{
qfv_device_t *device = ctx->device;
qfv_devfuncs_t *dfunc = device->funcs;
int layers = 0;
VkImageViewType type = 0;
const char *viewtype = 0;
switch (mode) {
case ST_NONE:
return 0;
case ST_PLANE:
layers = 1;
type = VK_IMAGE_VIEW_TYPE_2D;
viewtype = "plane";
break;
case ST_CASCADE:
layers = 4;
type = VK_IMAGE_VIEW_TYPE_2D_ARRAY;
viewtype = "cascade";
break;
case ST_CUBE:
layers = 6;
type = VK_IMAGE_VIEW_TYPE_CUBE;
viewtype = "cube";
break;
}
VkImageViewCreateInfo createInfo = {
VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO, 0,
0,
image, type, VK_FORMAT_X8_D24_UNORM_PACK32,
{
VK_COMPONENT_SWIZZLE_IDENTITY,
VK_COMPONENT_SWIZZLE_IDENTITY,
VK_COMPONENT_SWIZZLE_IDENTITY,
VK_COMPONENT_SWIZZLE_IDENTITY,
},
{ VK_IMAGE_ASPECT_DEPTH_BIT, 0, 1, baseLayer, layers }
};
VkImageView view;
dfunc->vkCreateImageView (device->dev, &createInfo, 0, &view);
QFV_duSetObjectName (device, VK_OBJECT_TYPE_IMAGE_VIEW, view,
va (ctx->va_ctx, "iview:shadowmap:%s:%d",
viewtype, id));
(void) viewtype;//silence unused warning when vulkan debug disabled
return view;
}
static void
build_shadow_maps (lightingctx_t *lctx, vulkan_ctx_t *ctx)
{
qfv_device_t *device = ctx->device;
qfv_devfuncs_t *dfunc = device->funcs;
qfv_physdev_t *physDev = device->physDev;
int maxLayers = physDev->properties.limits.maxImageArrayLayers;
lightingdata_t *ldata = lctx->ldata;
light_t *lights = ldata->lights.a;
int numLights = ldata->lights.size;
int size = -1;
int numLayers = 0;
int totalLayers = 0;
int *imageMap = alloca (numLights * sizeof (int));
size_t memsize = 0;
int *lightMap = alloca (numLights * sizeof (int));
for (int i = 0; i < numLights; i++) {
lightMap[i] = i;
}
DARRAY_RESIZE (&lctx->lightlayers, numLights);
heapsort_r (lightMap, numLights, sizeof (int), light_compare, ldata);
for (int i = 0; i < numLights; i++) {
int layers = 1;
int shadow = ST_NONE;
int li = lightMap[i];
if (!lights[li].position[3]) {
shadow = ST_CASCADE;
} else {
if (lights[li].direction[3] > -0.5) {
shadow = ST_CUBE;
} else {
shadow = ST_PLANE;
}
}
if (shadow == ST_CASCADE || shadow == ST_NONE) {
// cascade shadows will be handled separately, and "none" has no
// shadow map at all
imageMap[li] = -1;
continue;
}
if (shadow == ST_CUBE) {
layers = 6;
}
if (size != abs ((int) lights[li].color[3])
|| numLayers + layers > maxLayers) {
if (numLayers) {
VkImage shadow_map = create_map (size, numLayers, 1, ctx);
DARRAY_APPEND (&lctx->lightimages, shadow_map);
numLayers = 0;
}
size = abs ((int) lights[li].color[3]);
}
imageMap[li] = lctx->lightimages.size;
lctx->lightlayers.a[li] = numLayers;
numLayers += layers;
totalLayers += layers;
}
if (numLayers) {
VkImage shadow_map = create_map (size, numLayers, 1, ctx);
DARRAY_APPEND (&lctx->lightimages, shadow_map);
}
numLayers = 0;
size = 1024;
for (int i = 0; i < numLights; i++) {
int layers = 4;
int shadow = ST_NONE;
int li = lightMap[i];
if (!lights[li].position[3]) {
shadow = ST_CASCADE;
} else {
if (lights[li].direction[3] > -0.5) {
shadow = ST_CUBE;
} else {
shadow = ST_PLANE;
}
}
if (shadow != ST_CASCADE) {
continue;
}
if (numLayers + layers > maxLayers) {
VkImage shadow_map = create_map (size, numLayers, 0, ctx);
DARRAY_APPEND (&lctx->lightimages, shadow_map);
numLayers = 0;
}
imageMap[li] = lctx->lightimages.size;
lctx->lightlayers.a[li] = numLayers;
numLayers += layers;
totalLayers += layers;
}
if (numLayers) {
VkImage shadow_map = create_map (size, numLayers, 0, ctx);
DARRAY_APPEND (&lctx->lightimages, shadow_map);
}
for (size_t i = 0; i < lctx->lightimages.size; i++) {
memsize += QFV_GetImageSize (device, lctx->lightimages.a[i]);
}
lctx->shadow_memory = QFV_AllocImageMemory (device, lctx->lightimages.a[0],
VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
memsize, 0);
QFV_duSetObjectName (device, VK_OBJECT_TYPE_DEVICE_MEMORY,
lctx->shadow_memory, "memory:shadowmap");
size_t offset = 0;
for (size_t i = 0; i < lctx->lightimages.size; i++) {
dfunc->vkBindImageMemory (device->dev, lctx->lightimages.a[i],
lctx->shadow_memory, offset);
offset += QFV_GetImageSize (device, lctx->lightimages.a[i]);
}
DARRAY_RESIZE (&lctx->lightviews, numLights);
for (int i = 0; i < numLights; i++) {
int li = lightMap[i];
if (imageMap[li] == -1) {
lctx->lightviews.a[li] = 0;
continue;
}
int mode = ST_NONE;
if (!ldata->lights.a[li].position[3]) {
mode = ST_CASCADE;
} else {
if (ldata->lights.a[li].direction[3] > -0.5) {
mode = ST_CUBE;
} else {
mode = ST_PLANE;
}
}
lctx->lightviews.a[li] = create_view (lctx->lightimages.a[imageMap[li]],
lctx->lightlayers.a[li],
mode, li, ctx);
}
Sys_MaskPrintf (SYS_vulkan, "shadow maps: %d layers in %zd images: %zd\n",
totalLayers, lctx->lightimages.size, memsize);
}
void
Vulkan_LoadLights (scene_t *scene, vulkan_ctx_t *ctx)
{
lightingctx_t *lctx = ctx->lighting_context;
lctx->scene = scene;
lctx->ldata = scene ? scene->lights : 0;
clear_shadows (ctx);
if (lctx->ldata && lctx->ldata->lights.size) {
build_shadow_maps (lctx, ctx);
create_light_matrices (lctx);
}
}