eric/Crosspoint
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add framebuffer lending for memory-intensive builds

Browse Source 
Temporarily release framebuffer memory during section pagination to reduce heap pressure. The framebuffer can be released before memory-intensive operations and restored afterward, allowing BLE stack startup threshold to be lowered from 80KB to 70KB. Implements RAII-style FrameBufferBuildLoan class to ensure proper cleanup and automatic restart on restoration failure.
This commit is contained in:
Justin Mitchell
2026-07-09 00:04:11 -04:00
parent f3da5e4f06
commit 05c1e9aa46
15 changed files with 205 additions and 147 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/GfxRenderer/FontCacheManager.cpp
+14 -8
View File
@@ -62,7 +62,14 @@ void FontCacheManager::resetStats() {
bool FontCacheManager::isScanning() const { return scanMode_ == ScanMode::Scanning; }
void FontCacheManager::recordText(const char* text, int fontId, EpdFontFamily::Style style) {
scanText_ += text;
if (!text) return;
const size_t remaining = (scanTextLen_ < SCAN_TEXT_CAPACITY - 1) ? (SCAN_TEXT_CAPACITY - 1 - scanTextLen_) : 0;
if (remaining > 0) {
const size_t textLen = strnlen(text, remaining);
memcpy(scanText_ + scanTextLen_, text, textLen);
scanTextLen_ += textLen;
scanText_[scanTextLen_] = '\0';
}
if (scanFontId_ < 0) scanFontId_ = fontId;
const uint8_t baseStyle = static_cast<uint8_t>(style) & 0x03;
const unsigned char* p = reinterpret_cast<const unsigned char*>(text);
@@ -80,15 +87,15 @@ FontCacheManager::PrewarmScope::PrewarmScope(FontCacheManager& manager) : manage
manager_->scanMode_ = ScanMode::Scanning;
manager_->clearCache();
manager_->resetStats();
manager_->scanText_.clear();
manager_->scanText_.reserve(2048); // Pre-allocate to avoid heap fragmentation from repeated concat
manager_->scanTextLen_ = 0;
manager_->scanText_[0] = '\0';
memset(manager_->scanStyleCounts_, 0, sizeof(manager_->scanStyleCounts_));
manager_->scanFontId_ = -1;
}
void FontCacheManager::PrewarmScope::endScanAndPrewarm() {
manager_->scanMode_ = ScanMode::None;
if (manager_->scanText_.empty()) return;
if (manager_->scanTextLen_ == 0) return;
// Build style bitmask from all styles that appeared during the scan
uint8_t styleMask = 0;
@@ -97,11 +104,10 @@ void FontCacheManager::PrewarmScope::endScanAndPrewarm() {
}
if (styleMask == 0) styleMask = 1; // default to regular
manager_->prewarmCache(manager_->scanFontId_, manager_->scanText_.c_str(), styleMask);
manager_->prewarmCache(manager_->scanFontId_, manager_->scanText_, styleMask);
// Free scan string memory
manager_->scanText_.clear();
manager_->scanText_.shrink_to_fit();
manager_->scanTextLen_ = 0;
manager_->scanText_[0] = '\0';
}
FontCacheManager::PrewarmScope::~PrewarmScope() {