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/* DO NOT EDIT THIS FILE */
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/* This file is autogenerated by the text-database code generator */
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#include <fonts/CompressedUnmappedFontCache.hpp>
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#include <touchgfx/hal/HAL.hpp>
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#include <touchgfx/hal/Paint.hpp>
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namespace touchgfx
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{
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LOCATION_PRAGMA_32("TouchGFX_CompressedUnmappedFontCache")
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uint32_t CompressedUnmappedFontCache::bitmapFontCache[cacheWords] LOCATION_ATTRIBUTE_32("TouchGFX_CompressedUnmappedFontCache");
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uint8_t* CompressedUnmappedFontCache::pixelsTop = (uint8_t*)CompressedUnmappedFontCache::bitmapFontCache;
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int CompressedUnmappedFontCache::glyphsAllocated = 0;
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int CompressedUnmappedFontCache::cacheClearCounter = 0;
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namespace
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{
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/* Read nibbles from compressed data in unmapped flash. Must read through reader object */
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struct NibUnmapReader
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{
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NibUnmapReader(const uint8_t* srcAddress, touchgfx::FlashDataReader* reader)
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: address(srcAddress), reader(reader), byteIndex(0), low(true)
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{
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address += bufferSize;
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reader->copyData(srcAddress, buffer, sizeof(buffer));
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}
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const uint8_t* address; //next reading address
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touchgfx::FlashDataReader* reader;
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static const int bufferSize = 16;
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uint8_t buffer[bufferSize];
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uint8_t value;
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int byteIndex;
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bool low;
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uint8_t getNext()
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{
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if (low)
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{
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value = buffer[byteIndex];
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const uint8_t val = value & 0xF;
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low = false;
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return val;
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}
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const uint8_t val = value >> 4;
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low = true;
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if (byteIndex == bufferSize - 1)
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{
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reader->copyData(address, buffer, bufferSize);
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address += bufferSize;
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byteIndex = 0;
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}
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else
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{
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byteIndex++;
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}
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return val;
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}
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};
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struct NibWriter
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{
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NibWriter(uint8_t* buffer, int size)
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: buffer(buffer), bufferEnd(buffer + size), low(true) {}
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uint8_t* buffer;
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uint8_t* bufferEnd;
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int low;
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void put(uint8_t v)
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{
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if (low)
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{
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*buffer = v;
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low = false;
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return;
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}
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*buffer |= (v << 4);
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buffer++;
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low = true;
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}
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bool eof() { return buffer >= bufferEnd; }
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};
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} // anonymous namespace
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uint8_t* CompressedUnmappedFontCache::decompressGlyph(uint8_t* pixelsTop, const GlyphNode* glyphNode, const uint8_t* compressedData, touchgfx::FlashDataReader* flashReader)
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{
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const int byteSize = (glyphNode->width() + 1) / 2 * glyphNode->height();
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NibWriter writer(pixelsTop, byteSize);
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NibUnmapReader reader(compressedData, flashReader);
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uint8_t* const pixelsEnd = pixelsTop + byteSize;
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const int algorithm = glyphNode->dataOffset >> 30;
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if (algorithm == 1)
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{
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// RLE1
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while (!writer.eof())
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{
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const uint8_t value = reader.getNext();
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if (value == 0)
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{
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int zeroCount = reader.getNext();
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while (zeroCount)
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{
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writer.put(0);
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zeroCount--;
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}
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}
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writer.put(value);
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}
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}
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else if (algorithm == 2)
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{
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// RLE2
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while (!writer.eof())
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{
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const uint8_t value = reader.getNext();
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if (value == 0 || value == 0xF)
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{
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int count = reader.getNext();
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while (count)
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{
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writer.put(value);
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count--;
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}
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}
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writer.put(value);
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}
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}
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else
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{
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// Uncompressed
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flashReader->copyData(compressedData, pixelsTop, byteSize);
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}
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return pixelsEnd;
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}
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void CompressedUnmappedFontCache::clearCache()
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{
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// Wait for DMA2D/GPU2D to finish drawing
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HAL::getInstance()->lockUnlockFrameBuffer();
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glyphsAllocated = 0;
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cacheClearCounter++;
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pixelsTop = (uint8_t*)bitmapFontCache;
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}
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void CompressedUnmappedFontCache::unableToCache(const GlyphNode* glyphNode, int byteSize)
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{
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while(1);
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}
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const GlyphNode* CompressedUnmappedFontCache::hasCachedGlyphNode(const GlyphNode* glyphNode)
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{
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const BitmapFontCacheKey* end = (const BitmapFontCacheKey*)&bitmapFontCache[cacheWords];
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const BitmapFontCacheKey* first = end - glyphsAllocated;
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while (first < end)
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{
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if (first->glyphNodeSrc == glyphNode)
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{
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return &first->glyphNodeCopy;
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}
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first++;
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}
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return 0;
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}
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const GlyphNode* CompressedUnmappedFontCache::hasCachedGlyphData(const GlyphNode* glyphNode, const uint8_t*& pixelData)
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{
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const BitmapFontCacheKey* end = (const BitmapFontCacheKey*)&bitmapFontCache[cacheWords];
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const BitmapFontCacheKey* first = end - glyphsAllocated;
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while (first < end)
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{
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if (first->glyphNodeSrc == glyphNode)
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{
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//Pixel data can be zero!
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pixelData = first->pixels;
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return &first->glyphNodeCopy;
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}
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first++;
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}
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return 0;
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}
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GlyphNode* CompressedUnmappedFontCache::cacheGlyphNode(const GlyphNode* glyph)
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{
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const BitmapFontCacheKey* end = (const BitmapFontCacheKey*)&bitmapFontCache[cacheWords];
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if (pixelsTop + sizeof(BitmapFontCacheKey) > (const uint8_t*)&end[-glyphsAllocated])
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{
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// Unable to fit GlyphNode in data, clear cache
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clearCache();
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}
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glyphsAllocated++;
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BitmapFontCacheKey* key = const_cast<BitmapFontCacheKey*>(end - glyphsAllocated);
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key->glyphNodeSrc = glyph;
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key->pixels = 0;
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return &key->glyphNodeCopy;
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}
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const uint8_t* CompressedUnmappedFontCache::cacheGlyphData(const GlyphNode* glyph, const uint8_t* compressedData, touchgfx::FlashDataReader* reader)
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{
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// Search keys for glyph
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BitmapFontCacheKey* end = (BitmapFontCacheKey*)&bitmapFontCache[cacheWords];
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BitmapFontCacheKey* it = end - glyphsAllocated;
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while (it < end)
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{
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if (it->glyphNodeSrc == glyph)
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{
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break;
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}
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it++;
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}
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if (it == end)
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{
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// broken invariant!
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return 0;
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}
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const int byteSize = (it->glyphNodeCopy.width() + 1) / 2 * it->glyphNodeCopy.height();
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// Check if pixels can fit in cache
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if (pixelsTop + byteSize > (const uint8_t*)&end[-glyphsAllocated])
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{
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// Can it fit in a clean cache?
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if (byteSize + sizeof(BitmapFontCacheKey) > cacheSizeBytes)
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{
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unableToCache(glyph, byteSize);
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return 0;
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}
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// Unable to fit pixel in data, must clear cache
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// Save address of GlyphNode in cache
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const GlyphNode* cachedGn = &it->glyphNodeCopy;
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// Now clear (reset pointer)
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clearCache();
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// Insert glyph node again
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glyphsAllocated++;
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it = const_cast<BitmapFontCacheKey*>(end - 1);
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it->glyphNodeSrc = glyph;
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it->pixels = 0;
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// Copy GlyphNode content from previous position in cache
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it->glyphNodeCopy = *cachedGn;
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}
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//Now decompress data
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const uint8_t* glyphData = pixelsTop;
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pixelsTop = decompressGlyph(pixelsTop, &it->glyphNodeCopy, compressedData, reader);
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// Flush the cache lines, must be 32byte aligned
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uint8_t* rowStart = reinterpret_cast<uint8_t*>(reinterpret_cast<uintptr_t>(glyphData) & ~0x1F);
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int alignmentOffset = glyphData - rowStart;
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paint::flushLine((uint32_t*)rowStart, byteSize + alignmentOffset);
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paint::invalidateTextureCache();
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it->pixels = glyphData;
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return glyphData;
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}
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} // namespace touchgfx
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