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Expose bitmap data of Font glyphs in FontTextureAtlas

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This commit is contained in:
Ari Vuollet
2023-05-26 16:19:10 +03:00
parent 5f8e5d44dc
commit 326b6f000a
4 changed files with 55 additions and 29 deletions
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25
Source/Engine/Render2D/FontTextureAtlas.cpp
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@@ -40,7 +40,7 @@ void FontTextureAtlas::Init(uint32 width, uint32 height)
uint32 padding = GetPaddingAmount();
_width = width;
_height = height;
_root = New<Slot>(padding, padding, _width - padding, _height - padding);
_root = New<FontTextureAtlasSlot>(padding, padding, _width - padding, _height - padding);
_isDirty = false;
// Reserve upload data memory
@@ -48,19 +48,19 @@ void FontTextureAtlas::Init(uint32 width, uint32 height)
Platform::MemoryClear(_data.Get(), _data.Capacity());
}
FontTextureAtlas::Slot* FontTextureAtlas::AddEntry(uint32 targetWidth, uint32 targetHeight, const Array<byte>& data)
FontTextureAtlasSlot* FontTextureAtlas::AddEntry(uint32 targetWidth, uint32 targetHeight, const Array<byte>& data)
{
// Check for invalid size
if (targetWidth == 0 || targetHeight == 0)
return nullptr;
// Try to find slot for the texture
Slot* slot = nullptr;
FontTextureAtlasSlot* slot = nullptr;
const uint32 padding = GetPaddingAmount();
const uint32 allPadding = padding * 2;
for (int32 i = 0; i < _freeSlots.Count(); i++)
{
Slot* e = _freeSlots[i];
FontTextureAtlasSlot* e = _freeSlots[i];
if (e->Width == targetWidth + allPadding && e->Height == targetHeight + allPadding)
{
slot = e;
@@ -89,7 +89,7 @@ FontTextureAtlas::Slot* FontTextureAtlas::AddEntry(uint32 targetWidth, uint32 ta
bool FontTextureAtlas::Invalidate(uint32 x, uint32 y, uint32 width, uint32 height)
{
Slot* slot = invalidate(_root, x, y, width, height);
FontTextureAtlasSlot* slot = invalidate(_root, x, y, width, height);
if (slot)
{
_freeSlots.Add(slot);
@@ -97,7 +97,7 @@ bool FontTextureAtlas::Invalidate(uint32 x, uint32 y, uint32 width, uint32 heigh
return slot != nullptr;
}
void FontTextureAtlas::CopyDataIntoSlot(const Slot* slot, const Array<byte>& data)
void FontTextureAtlas::CopyDataIntoSlot(const FontTextureAtlasSlot* slot, const Array<byte>& data)
{
uint8* start = &_data[slot->Y * _width * _bytesPerPixel + slot->X * _bytesPerPixel];
const uint32 padding = GetPaddingAmount();
@@ -148,6 +148,15 @@ void FontTextureAtlas::CopyDataIntoSlot(const Slot* slot, const Array<byte>& dat
}
}
byte* FontTextureAtlas::GetSlotData(const FontTextureAtlasSlot* slot, uint32& width, uint32& height, uint32& stride)
{
const uint32 padding = GetPaddingAmount();
width = slot->Width - padding * 2;
height = slot->Height - padding * 2;
stride = _width * _bytesPerPixel;
return &_data[slot->Y * _width * _bytesPerPixel + slot->X * _bytesPerPixel];
}
void FontTextureAtlas::copyRow(const RowData& copyRowData) const
{
const byte* data = copyRowData.SrcData;
@@ -238,13 +247,13 @@ bool FontTextureAtlas::HasDataSyncWithGPU() const
return _isDirty == false;
}
FontTextureAtlas::Slot* FontTextureAtlas::invalidate(Slot* parent, uint32 x, uint32 y, uint32 width, uint32 height)
FontTextureAtlasSlot* FontTextureAtlas::invalidate(FontTextureAtlasSlot* parent, uint32 x, uint32 y, uint32 width, uint32 height)
{
if (parent->X == x && parent->Y == y && parent->Width == width && parent->Height == height)
{
return parent;
}
Slot* result = parent->Left ? invalidate(parent->Left, x, y, width, height) : nullptr;
FontTextureAtlasSlot* result = parent->Left ? invalidate(parent->Left, x, y, width, height) : nullptr;
if (result)
return result;
return parent->Right ? invalidate(parent->Right, x, y, width, height) : nullptr;