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MobileGL/MobileGL/MG_Backend/DirectVulkan/Renderer/VkTextureManager.h
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// MobileGL - MobileGL/MG_Backend/DirectVulkan/Renderer/VkTextureManager.h
// Copyright (c) 2025-2026 MobileGL-Dev
// Licensed under the GNU Lesser General Public License v3.0:
// https://www.gnu.org/licenses/gpl-3.0.txt
// https://www.gnu.org/licenses/lgpl-3.0.txt
// SPDX-License-Identifier: LGPL-3.0-only
// End of Source File Header
#pragma once
#include "../VkIncludes.h"
#include <Includes.h>
#include <MG_State/GLState/TextureState/TextureObject.h>
#include <vk_mem_alloc.h>
#include <unordered_map>
#include <unordered_set>
namespace MobileGL::MG_State::GLState {
class ITextureObject;
}
namespace MobileGL::MG_Backend::DirectVulkan {
enum class SamplerNumericDomain : Uint8;
class VkTextureManager {
public:
// Monotonic epoch bumped whenever a texture VkImage is (re)created. The render-pass
// manager keys its per-draw fast path on this so an attachment's image recreation
// invalidates the cached render pass (dirty-flag tracking; portable to Vulkan 1.1).
Uint64 GetTextureImageEpoch() const { return m_textureImageEpoch; }
// Bumped whenever any tracked texture resource is erased; cached
// TextureResource pointers are valid only while this is unchanged.
Uint64 GetResourceEraseEpoch() const { return m_resourceEraseEpoch; }
struct TextureIdentity {
MG_State::GLState::ITextureObject* texture = nullptr;
Uint64 lifetimeId = 0;
Bool operator==(const TextureIdentity& other) const {
return texture == other.texture && lifetimeId == other.lifetimeId;
}
};
struct TextureIdentityHash {
SizeT operator()(const TextureIdentity& key) const {
SizeT hash = std::hash<MG_State::GLState::ITextureObject*>{}(key.texture);
hash ^= std::hash<Uint64>{}(key.lifetimeId) + 0x9e3779b9u + (hash << 6) + (hash >> 2);
return hash;
}
};
struct InitInfo {
VkDevice device = VK_NULL_HANDLE;
VkPhysicalDevice physicalDevice = VK_NULL_HANDLE;
VmaAllocator allocator = nullptr;
VkCommandPool commandPool = VK_NULL_HANDLE;
VkQueue graphicsQueue = VK_NULL_HANDLE;
Uint32 frameCount = 0;
// VK_KHR_image_format_list is enabled: MUTABLE_FORMAT images can name the exact set of
// formats they will be viewed as, which is what lets a tiler keep them compressed.
Bool imageFormatListSupported = false;
// Union of shader stages sampled-read barriers may name on this device; the renderer
// builds it from the enabled features because geometry/tessellation stage bits are
// invalid in a barrier when their feature is off.
VkPipelineStageFlags sampledReadStageMask = VK_PIPELINE_STAGE_VERTEX_SHADER_BIT |
VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT |
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT;
// Family of `graphicsQueue`; the manager creates its own command pool
// on it for the recycled upload-batch command buffers, so their parked
// allocations never sit in (and fragment) the renderer's shared pool
// that frame command buffers churn through every frame.
Uint32 graphicsQueueFamilyIndex = 0;
};
struct TextureResource {
struct AttachmentViewKey {
Uint32 mipLevel = 0;
Uint32 baseArrayLayer = 0;
Uint32 layerCount = 1;
VkImageViewType viewType = VK_IMAGE_VIEW_TYPE_2D;
// May differ from the image format: sRGB images attach through their UNORM
// twin while GL_FRAMEBUFFER_SRGB is disabled.
VkFormat viewFormat = VK_FORMAT_UNDEFINED;
Bool operator==(const AttachmentViewKey& other) const {
return mipLevel == other.mipLevel &&
baseArrayLayer == other.baseArrayLayer &&
layerCount == other.layerCount &&
viewType == other.viewType &&
viewFormat == other.viewFormat;
}
};
struct AttachmentViewKeyHash {
SizeT operator()(const AttachmentViewKey& key) const {
SizeT hash = std::hash<Uint32>{}(key.mipLevel);
hash ^= std::hash<Uint32>{}(key.baseArrayLayer) + 0x9e3779b9u + (hash << 6) + (hash >> 2);
hash ^= std::hash<Uint32>{}(key.layerCount) + 0x9e3779b9u + (hash << 6) + (hash >> 2);
hash ^= std::hash<Uint32>{}(static_cast<Uint32>(key.viewType)) +
0x9e3779b9u + (hash << 6) + (hash >> 2);
hash ^= std::hash<Uint32>{}(static_cast<Uint32>(key.viewFormat)) +
0x9e3779b9u + (hash << 6) + (hash >> 2);
return hash;
}
};
struct StorageImageViewKey {
Uint32 mipLevel = 0;
Uint32 baseArrayLayer = 0;
Uint32 layerCount = 1;
VkImageViewType viewType = VK_IMAGE_VIEW_TYPE_2D;
VkFormat format = VK_FORMAT_UNDEFINED;
Bool operator==(const StorageImageViewKey& other) const {
return mipLevel == other.mipLevel &&
baseArrayLayer == other.baseArrayLayer &&
layerCount == other.layerCount &&
viewType == other.viewType &&
format == other.format;
}
};
struct SampledImageViewKey {
Uint32 baseMipLevel = 0;
Uint32 levelCount = 1;
VkImageViewType viewType = VK_IMAGE_VIEW_TYPE_2D;
VkFormat format = VK_FORMAT_UNDEFINED;
Bool operator==(const SampledImageViewKey& other) const {
return baseMipLevel == other.baseMipLevel &&
levelCount == other.levelCount &&
viewType == other.viewType &&
format == other.format;
}
};
struct SampledImageViewKeyHash {
SizeT operator()(const SampledImageViewKey& key) const {
SizeT hash = std::hash<Uint32>{}(key.baseMipLevel);
hash ^= std::hash<Uint32>{}(key.levelCount) + 0x9e3779b9u + (hash << 6) + (hash >> 2);
hash ^= std::hash<Uint32>{}(static_cast<Uint32>(key.viewType)) +
0x9e3779b9u + (hash << 6) + (hash >> 2);
hash ^= std::hash<Uint32>{}(static_cast<Uint32>(key.format)) +
0x9e3779b9u + (hash << 6) + (hash >> 2);
return hash;
}
};
struct StorageImageViewKeyHash {
SizeT operator()(const StorageImageViewKey& key) const {
SizeT hash = std::hash<Uint32>{}(key.mipLevel);
hash ^= std::hash<Uint32>{}(key.baseArrayLayer) + 0x9e3779b9u + (hash << 6) + (hash >> 2);
hash ^= std::hash<Uint32>{}(key.layerCount) + 0x9e3779b9u + (hash << 6) + (hash >> 2);
hash ^= std::hash<Uint32>{}(static_cast<Uint32>(key.viewType)) +
0x9e3779b9u + (hash << 6) + (hash >> 2);
hash ^= std::hash<Uint32>{}(static_cast<Uint32>(key.format)) +
0x9e3779b9u + (hash << 6) + (hash >> 2);
return hash;
}
};
VkImage image = VK_NULL_HANDLE;
VmaAllocation allocation = nullptr;
VkImageView fullView = VK_NULL_HANDLE;
VkImageView sampledView = VK_NULL_HANDLE;
Vector<VkImageView> perMipViews;
Vector<VkImageView> perMipSampledViews;
UnorderedMap<AttachmentViewKey, VkImageView, AttachmentViewKeyHash> attachmentViews;
UnorderedMap<SampledImageViewKey, VkImageView, SampledImageViewKeyHash> alternateSampledViews;
UnorderedMap<StorageImageViewKey, VkImageView, StorageImageViewKeyHash> storageImageViews;
VkImageLayout layout = VK_IMAGE_LAYOUT_UNDEFINED;
VkExtent2D extent = {0, 0};
Uint32 depth = 1;
Uint32 arrayLayers = 1;
Uint32 mipLevels = 1;
Uint32 sampledBaseMipLevel = 0;
Uint32 sampledLevelCount = 1;
VkFormat format = VK_FORMAT_UNDEFINED;
VkImageAspectFlags aspect = VK_IMAGE_ASPECT_NONE;
VkImageViewType viewType = VK_IMAGE_VIEW_TYPE_2D;
VkSampleCountFlagBits sampleCount = VK_SAMPLE_COUNT_1_BIT;
VkImageCreateFlags imageCreateFlags = 0;
// Usage the live image was created with. STORAGE is only requested for textures that
// have actually been bound to a GL image unit, because on Adreno a storage-capable
// image loses UBWC bandwidth compression; a later image binding upgrades the usage
// and recreates the image, so the resolved usage has to be part of the compatibility
// check that decides whether the existing image can be kept.
VkImageUsageFlags usageFlags = 0;
// True once this image was (re)resolved while the texture was already marked as an
// image-unit texture. Distinguishes "not upgraded yet" from "cannot be upgraded"
// (a format whose optimalTilingFeatures lack STORAGE_IMAGE never gains the bit), so
// NeedsStorageImagePreparation cannot ask for a recreate that will never happen.
Bool storageUsageResolved = false;
Uint16 syncedTextureParamsVersion = 0;
// Recording generation (VkTextureManager::GetRecordingGeneration) of the last
// command referencing this image that was recorded into the CURRENT frame
// command buffer. An image untouched by the open recording may have its
// out-of-pass work (deferred clears, sampled-layout transitions) recorded
// into the frame's PRE command buffer - which executes strictly before the
// frame's commands - instead of splitting the active render pass.
Uint64 lastRecordingGeneration = 0;
// Snapshot of ITextureObject::GetContentVersion() at the last successful sync;
// lets SyncTexture skip the whole re-check/re-upload when content is unchanged.
Uint64 syncedContentVersion = 0;
// Snapshot of the defined mip-level count at the last sync. Folded into the early-out key
// as defense-in-depth: any path that grows the level set (which resizes the sampled view)
// busts the skip even if it failed to bump the content version.
Uint32 syncedMipLevelCount = 0;
TextureResource() = default;
TextureResource(const TextureResource&) = delete;
TextureResource(TextureResource&& that) noexcept {
std::swap(this->image, that.image);
std::swap(this->allocation, that.allocation);
std::swap(this->fullView, that.fullView);
std::swap(this->sampledView, that.sampledView);
std::swap(this->perMipViews, that.perMipViews);
std::swap(this->perMipSampledViews, that.perMipSampledViews);
std::swap(this->attachmentViews, that.attachmentViews);
std::swap(this->alternateSampledViews, that.alternateSampledViews);
std::swap(this->storageImageViews, that.storageImageViews);
std::swap(this->layout, that.layout);
std::swap(this->extent, that.extent);
std::swap(this->depth, that.depth);
std::swap(this->arrayLayers, that.arrayLayers);
std::swap(this->mipLevels, that.mipLevels);
std::swap(this->sampledBaseMipLevel, that.sampledBaseMipLevel);
std::swap(this->sampledLevelCount, that.sampledLevelCount);
std::swap(this->format, that.format);
std::swap(this->aspect, that.aspect);
std::swap(this->viewType, that.viewType);
std::swap(this->sampleCount, that.sampleCount);
std::swap(this->imageCreateFlags, that.imageCreateFlags);
std::swap(this->usageFlags, that.usageFlags);
std::swap(this->storageUsageResolved, that.storageUsageResolved);
std::swap(this->syncedTextureParamsVersion, that.syncedTextureParamsVersion);
std::swap(this->lastRecordingGeneration, that.lastRecordingGeneration);
std::swap(this->syncedContentVersion, that.syncedContentVersion);
std::swap(this->syncedMipLevelCount, that.syncedMipLevelCount);
}
void Reset() {
if (fullView != VK_NULL_HANDLE) {
vkDestroyImageView(s_device, fullView, nullptr);
}
if (sampledView != VK_NULL_HANDLE) {
vkDestroyImageView(s_device, sampledView, nullptr);
}
for (const auto attachmentView : perMipViews) {
if (attachmentView != VK_NULL_HANDLE) {
vkDestroyImageView(s_device, attachmentView, nullptr);
}
}
for (const auto sampledView : perMipSampledViews) {
if (sampledView != VK_NULL_HANDLE) {
vkDestroyImageView(s_device, sampledView, nullptr);
}
}
for (const auto& [_, attachmentView] : attachmentViews) {
if (attachmentView != VK_NULL_HANDLE) {
vkDestroyImageView(s_device, attachmentView, nullptr);
}
}
for (const auto& [_, sampledView] : alternateSampledViews) {
if (sampledView != VK_NULL_HANDLE) {
vkDestroyImageView(s_device, sampledView, nullptr);
}
}
for (const auto& [_, storageImageView] : storageImageViews) {
if (storageImageView != VK_NULL_HANDLE) {
vkDestroyImageView(s_device, storageImageView, nullptr);
}
}
if (image != VK_NULL_HANDLE && allocation != nullptr) {
vmaDestroyImage(s_allocator, image, allocation);
}
fullView = VK_NULL_HANDLE;
sampledView = VK_NULL_HANDLE;
perMipViews.clear();
perMipSampledViews.clear();
attachmentViews.clear();
alternateSampledViews.clear();
storageImageViews.clear();
image = VK_NULL_HANDLE;
allocation = nullptr;
layout = VK_IMAGE_LAYOUT_UNDEFINED;
extent = {0, 0};
depth = 1;
arrayLayers = 1;
mipLevels = 1;
sampledBaseMipLevel = 0;
sampledLevelCount = 1;
format = VK_FORMAT_UNDEFINED;
aspect = VK_IMAGE_ASPECT_NONE;
viewType = VK_IMAGE_VIEW_TYPE_2D;
sampleCount = VK_SAMPLE_COUNT_1_BIT;
imageCreateFlags = 0;
usageFlags = 0;
storageUsageResolved = false;
syncedTextureParamsVersion = 0;
syncedContentVersion = 0;
syncedMipLevelCount = 0;
}
~TextureResource() {
Reset();
}
static inline VkDevice s_device = VK_NULL_HANDLE;
static inline VmaAllocator s_allocator = VK_NULL_HANDLE;
};
Bool Initialize(const InitInfo& initInfo);
void Shutdown();
void BeginFrame(Uint32 frameIndex);
// Submits the accumulated texture-upload batch (one command buffer, one
// vkQueueSubmit, one pooled fence) if any uploads are pending. MUST run
// before any other vkQueueSubmit on the shared graphics queue whose
// commands may consume an image the batch writes - the frame command
// buffer submit (mid-frame flush, readback, Present) and the
// preserve-on-recreate copy are the existing callers. No-op when the
// batch is empty.
void FlushPendingUploads();
// Drains every frame slot's deferred image/view releases. Only valid when
// the caller has proven every queue submission complete; used by the
// present-less frame-boundary drain.
void CollectAllDeferredReleases();
TextureResource* SyncTextureAndGetDescriptor(
MG_State::GLState::ITextureObject& texture);
VkImageView GetOrCreateViewAtMipLevel(MG_State::GLState::ITextureObject& texture, Uint32 mipLevel);
VkImageView GetOrCreateAttachmentViewAtMipLevel(MG_State::GLState::ITextureObject& texture, Uint32 mipLevel,
Uint32 baseArrayLayer, Uint32 layerCount,
VkImageViewType viewType);
VkImageView GetOrCreateSampledViewAtMipLevel(MG_State::GLState::ITextureObject& texture, Uint32 mipLevel);
VkImageView GetOrCreateSampledImageView(MG_State::GLState::ITextureObject& texture, VkFormat format);
VkImageView GetOrCreateStorageImageView(MG_State::GLState::ITextureObject& texture, Uint32 mipLevel,
VkFormat format, Bool layered, Int32 layer);
void UpdateTrackedImageLayout(MG_State::GLState::ITextureObject* texture, VkImageLayout newLayout);
void UpdateTrackedImageLayoutAfterAttachmentWrite(VkCommandBuffer commandBuffer,
MG_State::GLState::ITextureObject* texture,
Uint32 writtenMipLevel,
VkImageLayout newLayout);
Bool TransitionTextureForSampling(VkCommandBuffer commandBuffer, MG_State::GLState::ITextureObject& texture);
Bool TransitionTextureForStorageImage(VkCommandBuffer commandBuffer, MG_State::GLState::ITextureObject& texture);
// Recording-generation bookkeeping for the pre-pass command stream. The
// generation advances every time the frame command buffer (re)begins
// recording; a resource whose stamp does not match was not referenced by
// any command in the open recording, so its out-of-pass work may safely
// execute ahead of the whole recording (in the pre command buffer).
void AdvanceRecordingGeneration() { ++m_recordingGeneration; }
void StampResourceRecordingUse(TextureResource& resource) const {
resource.lastRecordingGeneration = m_recordingGeneration;
}
// Map-lookup variant for callers that only hold the GL texture object.
void StampTextureRecordingUse(MG_State::GLState::ITextureObject* texture);
Bool WasTouchedThisRecording(const TextureResource& resource) const {
return resource.lastRecordingGeneration == m_recordingGeneration;
}
// Records that this texture is bound to a GL image unit, so its image must carry
// VK_IMAGE_USAGE_STORAGE_BIT. Must be called before NeedsStorageImagePreparation, and
// therefore before the render pass is committed: an image that has to be upgraded is
// recreated, which is illegal inside a render pass. Sticky for the texture's lifetime -
// GL lets an image binding come and go, and re-creating the image every time it does
// would cost far more than the compression it wins back.
void MarkStorageImageTexture(MG_State::GLState::ITextureObject& texture);
// True when this texture is marked but its live image predates the mark, i.e. the next sync
// will recreate it with STORAGE usage and copy the old contents forward. Callers use this to
// submit their pending recording first, so that copy cannot read pre-flush content.
Bool NeedsStorageUsageUpgrade(MG_State::GLState::ITextureObject& texture) const;
// The same ordering question for the other recreate-and-preserve trigger: true when this
// texture's live image carries a shorter mip chain than a full one, so defining the missing
// levels recreates it and copies the old contents forward.
Bool NeedsMipChainGrowth(MG_State::GLState::ITextureObject& texture) const;
// Non-mutating probe for the per-draw storage-image fast path: true when preparing this
// texture as a storage image may need work that is illegal inside a render pass (resource
// creation, dirty-content upload, or a layout transition to GENERAL). Unknown state reports
// true - a false positive merely ends the render pass, a false negative would skip a barrier.
Bool NeedsStorageImagePreparation(MG_State::GLState::ITextureObject& texture) const;
// `depthStencilTextureMode` is the texture's GL_DEPTH_STENCIL_TEXTURE_MODE; it only decides
// anything for an image that carries both aspects. Defaulted so the call sites that have no
// texture in hand keep the depth-aspect answer they have always given.
static VkImageAspectFlags ResolveSampledImageViewAspectMask(VkImageAspectFlags imageAspect,
GLenum depthStencilTextureMode = GL_DEPTH_COMPONENT);
static VkFormat ResolveSampledImageViewFormat(VkFormat imageFormat, SamplerNumericDomain numericDomain);
static Bool AreSampledImageViewFormatsCompatible(VkFormat imageFormat, VkFormat viewFormat);
static Bool AreStorageImageViewFormatsCompatible(VkFormat imageFormat, VkFormat viewFormat);
static Bool TransitionImageLayout(VkCommandBuffer commandBuffer, VkImage image, VkImageLayout& trackedLayout,
VkImageLayout newLayout, VkPipelineStageFlags srcStageMask,
VkPipelineStageFlags dstStageMask, VkAccessFlags srcAccessMask,
VkAccessFlags dstAccessMask, VkImageAspectFlags aspectMask,
Uint32 baseMipLevel = 0, Uint32 levelCount = 1,
Uint32 layerCount = 1);
SizeT CollectGarbage();
// Per-draw sync memo. Within a single SetupDraw the same sampled texture is
// resolved ~3x (SetupDraw's layout-probe loop, its post-transition loop, and
// again inside ResolveSamplerDescriptor). No GL texture mutation can happen
// mid-SetupDraw, and layout is tracked on the TextureResource independently of
// SyncTexture, so after the first successful sync of a texture in a draw the
// heavy SyncTexture work (mip-completeness/resource/view resync + dirty scan)
// is pure redundancy. BeginDrawSyncScope opens a window in which repeat
// SyncTextureAndGetDescriptor calls short-circuit to the already-synced
// resource; EndDrawSyncScope closes it. Use the RAII DrawSyncScope guard.
void BeginDrawSyncScope();
void EndDrawSyncScope();
// RAII guard that opens/closes a per-draw sync memo window (see above).
class DrawSyncScope {
public:
explicit DrawSyncScope(VkTextureManager& manager) : m_manager(manager) { m_manager.BeginDrawSyncScope(); }
~DrawSyncScope() { m_manager.EndDrawSyncScope(); }
DrawSyncScope(const DrawSyncScope&) = delete;
DrawSyncScope& operator=(const DrawSyncScope&) = delete;
private:
VkTextureManager& m_manager;
};
private:
// Bumped in SyncTextureResource right after vmaCreateImage(texture). See GetTextureImageEpoch().
Uint64 m_textureImageEpoch = 1;
// See AdvanceRecordingGeneration. Starts above every resource's default
// stamp of 0 so a fresh resource counts as untouched.
Uint64 m_recordingGeneration = 1;
Bool SyncTexture(MG_State::GLState::ITextureObject &texture,
TextureResource &outResource);
Bool SyncTextureResource(const MG_State::GLState::ITextureObject &texture,
TextureUploadTarget uploadTarget,
const IntVec3 &texelSize, SizeT byteSize, Uint32 mipLevels,
TextureResource &resource);
Bool SyncTextureViews(const MG_State::GLState::ITextureObject& texture, TextureResource& resource);
VkImageView CreateImageView(VkImage image, VkFormat format, VkImageAspectFlags aspect,
VkImageViewType viewType, Uint32 baseMipLevel, Uint32 levelCount,
Uint32 baseArrayLayer,
Uint32 layerCount,
const VkComponentMapping* components = nullptr,
VkImageUsageFlags viewUsage = 0) const;
Bool UploadDirtyMipLevels(MG_State::GLState::TextureObjectMipmap &mipmapTexture,
TextureUploadTarget uploadTarget,
TextureResource &outResource);
static Bool CheckMipmapCompleteness(const MG_State::GLState::ITextureObject& texture,
TextureUploadTarget& outTarget,
IntVec3& outTexelSize,
SizeT& outByteSize,
Uint32& outMipLevelCount);
static Uint32 GetUploadMipLevelCount(const MG_State::GLState::TextureObjectMipmap& texture, TextureUploadTarget target);
static void ResolveViewMipRange(const MG_State::GLState::ITextureObject& texture, Uint32 mipLevels,
Uint32& outBaseMipLevel, Uint32& outLevelCount);
static VkImageAspectFlags GetAspectMaskForFormat(VkFormat format);
void DeferResourceRelease(TextureResource&& resource);
void DeferViewRelease(VkImageView view);
void CollectDeferredReleases(Uint32 frameIndex);
void DestroyDeferredReleases();
// Frees the fence/command buffer/staging buffer of every in-flight texture
// upload whose fence has signaled (submission order = completion order on
// the single queue, so the scan stops at the first still-pending entry).
// waitAll blocks on every entry - Shutdown's drain.
void ReclaimCompletedUploads(Bool waitAll = false);
static TextureIdentity MakeTextureIdentity(MG_State::GLState::ITextureObject* texture);
void EraseTrackedTexture(const TextureIdentity& identity);
void PruneStaleTextureAliases(MG_State::GLState::ITextureObject* texture);
SizeT PruneDeadTextures();
VkDevice m_device = VK_NULL_HANDLE;
VkPhysicalDevice m_physicalDevice = VK_NULL_HANDLE;
VmaAllocator m_allocator = nullptr;
VkCommandPool m_commandPool = VK_NULL_HANDLE;
// Dedicated pool for the recycled upload-batch command buffers (see
// InitInfo::graphicsQueueFamilyIndex).
VkCommandPool m_uploadCommandPool = VK_NULL_HANDLE;
VkQueue m_graphicsQueue = VK_NULL_HANDLE;
Bool m_imageFormatListSupported = false;
Uint32 m_currentFrameIndex = 0;
Uint8 m_gcCounter = 0;
// Frame-boundary GC gate: counts BeginFrame calls, not draws, so texture churn
// through non-draw paths (FBO clears, readbacks) still reaches the prune.
Uint32 m_gcFrameCounter = 0;
// Active only between BeginDrawSyncScope/EndDrawSyncScope; identities of
// textures already fully synced in the current draw (small N -> flat scan).
Bool m_drawSyncScopeActive = false;
// Per-draw sync memo: the identity plus the resolved resource pointer. The pointer is stable
// across rehash in the node-based m_textureResources and stays valid for the draw (a texture
// synced this draw is alive and is not erased mid-draw), so a repeat sync of the same texture
// returns the resource without re-hashing the identity into m_textureResources.
struct DrawSyncedTexture {
TextureIdentity identity;
TextureResource* resource = nullptr;
};
Vector<DrawSyncedTexture> m_drawSyncedThisDraw;
// Cross-draw sampled-texture memo: the same few textures (atlas, lightmap)
// are resolved on every draw, so cache their resource pointers and skip the
// alive/resource map lookups. Node-based std::unordered_map keeps the
// pointees stable across inserts; erases bump m_resourceEraseEpoch, which
// every memo entry must match. SyncTexture still runs on memo hits, so
// content/param freshness is unaffected. A dead-then-reused texture address
// cannot false-hit: the new object carries a new lifetime id.
struct SyncedTextureMemoEntry {
const MG_State::GLState::ITextureObject* texture = nullptr;
Uint64 lifetimeId = 0;
Uint64 eraseEpoch = 0;
TextureResource* resource = nullptr;
};
static constexpr Uint32 kSyncedTextureMemoSize = 8;
SyncedTextureMemoEntry m_syncedTextureMemo[kSyncedTextureMemoSize];
Uint32 m_syncedTextureMemoNext = 0;
Uint64 m_resourceEraseEpoch = 1;
// Formats whose mutable-image probe failed on this device; their images are created
// without MUTABLE_FORMAT_BIT so repeat syncs neither re-probe nor flag-mismatch.
std::unordered_set<VkFormat> m_mutableFormatUnsupported;
// Formats whose 3D images refused VK_IMAGE_CREATE_2D_ARRAY_COMPATIBLE_BIT. Per format+usage,
// exactly like the mutable-format verdict above, so it is answered at image creation and
// remembered rather than probed once globally.
std::unordered_set<VkFormat> m_2dArrayCompatibleUnsupported;
std::unordered_map<TextureIdentity, WeakPtr<MG_State::GLState::ITextureObject>, TextureIdentityHash> m_aliveObjects;
std::unordered_map<TextureIdentity, TextureResource, TextureIdentityHash> m_textureResources;
// Textures that have been bound to a GL image unit (see MarkStorageImageTexture).
std::unordered_set<TextureIdentity, TextureIdentityHash> m_storageImageTextures;
// Supported multisample counts per format, so repeat texture syncs do not
// re-query vkGetPhysicalDeviceImageFormatProperties.
std::unordered_map<VkFormat, VkSampleCountFlags> m_multisampleCountsByFormat;
Vector<Vector<TextureResource>> m_deferredReleases;
Vector<Vector<VkImageView>> m_deferredViewReleases;
// --- Batched upload machinery ---
// Uploads within a frame are recorded into ONE shared command buffer and
// submitted with ONE vkQueueSubmit at FlushPendingUploads (the renderer
// flushes before every frame-command-buffer submit). Staging memory comes
// from a pool of persistently-mapped, reusable blocks instead of a
// vmaCreateBuffer per upload.
struct UploadStagingBlock {
VkBuffer buffer = VK_NULL_HANDLE;
VmaAllocation allocation = nullptr;
Uint8* mapped = nullptr; // persistently mapped for the block's lifetime
VkDeviceSize capacity = 0;
VkDeviceSize cursor = 0; // bump cursor while the block backs the open batch
};
// Opens the batch command buffer lazily (allocates/reuses + begins recording).
VkCommandBuffer EnsureUploadBatchOpen();
// Bump-allocates `size` staging bytes for the open batch, growing onto a
// new/pooled block when the current one cannot fit. Returns the write
// pointer; outBuffer/outBaseOffset locate the space for copy commands.
Uint8* AcquireUploadStagingSpace(VkDeviceSize size, VkBuffer& outBuffer, VkDeviceSize& outBaseOffset);
void RecycleUploadStagingBlock(UploadStagingBlock&& block);
// Drops a recorded-but-unsubmitted batch on the floor. Shutdown only: the
// device is being torn down, so the lost texel data is unobservable.
void DiscardPendingUploadBatch();
void DestroyUploadPools();
Vector<UploadStagingBlock> m_freeUploadStagingBlocks;
VkDeviceSize m_freeUploadStagingBytes = 0;
Vector<VkCommandBuffer> m_freeUploadCommandBuffers;
Vector<VkFence> m_freeUploadFences;
Bool m_uploadBatchOpen = false;
VkCommandBuffer m_uploadBatchCommandBuffer = VK_NULL_HANDLE;
// Blocks whose staging bytes the open batch's copies reference (last =
// the block the bump cursor is currently allocating from).
Vector<UploadStagingBlock> m_uploadBatchBlocks;
// Images the open batch writes; consulted for the rare re-upload-after-
// draw flush and by DeferResourceRelease (an unsubmitted command buffer
// referencing a deferred-released image would escape every fence-based
// destruction proof, so the batch is flushed before the image is parked).
Vector<VkImage> m_uploadBatchImages;
VkDeviceSize m_uploadBatchStagingBytes = 0;
// Texture uploads are submitted out-of-band but NOT waited on (waiting
// behind the queue serialized the CPU against the previous frame's GPU
// work every time an animated atlas re-uploaded). Each flushed batch's
// transients are parked here and RECYCLED (fence reset to the fence pool,
// command buffer reset to the CB pool, staging blocks back to the block
// pool) once the batch fence signals.
struct PendingUploadReclaim {
VkFence fence = VK_NULL_HANDLE;
VkCommandBuffer commandBuffer = VK_NULL_HANDLE;
Vector<UploadStagingBlock> stagingBlocks;
};
Vector<PendingUploadReclaim> m_pendingUploadReclaims;
};
} // namespace MobileGL::MG_Backend::DirectVulkan
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