Merge pull request #5371 from odin-lang/bill/vendor/kb-text-shape

`vendor/kb_text_shape`

Author: gingerBill

examples/all/all_vendor.odin

@@ -45,4 +45,7 @@ package all
 @(require) import stbi "vendor:stb/image"
 @(require) import "vendor:stb/rect_pack"
 @(require) import "vendor:stb/truetype"
-@(require) import "vendor:stb/vorbis"
+@(require) import "vendor:stb/vorbis"
+
+
+@(require) import "vendor:kb_text_shape"

vendor/kb_text_shape/kb_text_shape_procs.odin

@@ -0,0 +1,151 @@
+package vendor_kb_text_shape
+
+when ODIN_OS == .Windows {
+	foreign import lib {
+		"lib/kb_text_shape.lib",
+	}
+} else {
+	foreign import lib {
+		"kb_text_shape.a",
+	}
+}
+
+import "core:c"
+import "core:mem"
+
+#assert(size_of(c.int) == size_of(b32))
+#assert(size_of(u32)   == size_of(b32))
+
+@(default_calling_convention="c", link_prefix="kbts_", require_results)
+foreign lib {
+	FontIsValid       :: proc(Font: ^font) -> b32 ---
+	SizeOfShapeState  :: proc(Font: ^font) -> un ---
+
+	ResetShapeState   :: proc(State: ^shape_state) ---
+
+	ShapeConfig       :: proc(Font: ^font, Script: script, Language: language) -> shape_config ---
+	ShaperIsComplex   :: proc(Shaper: shaper) -> b32 ---
+	ScriptIsComplex   :: proc(Script: script) -> b32 ---
+
+	Shape             :: proc(State: ^shape_state, Config: ^shape_config,
+	                          MainDirection, RunDirection: direction,
+	                          Glyphs: [^]glyph, GlyphCount: ^u32, GlyphCapacity: u32) -> c.int ---
+
+	Cursor            :: proc(Direction: direction) -> cursor  ---
+	BeginBreak        :: proc(State: ^break_state, MainDirection: direction, JapaneseLineBreakStyle: japanese_line_break_style) ---
+	BreakStateIsValid :: proc(State: ^break_state) -> b32 ---
+	BreakAddCodepoint :: proc(State: ^break_state, Codepoint: rune, PositionIncrement: u32, EndOfText: c.int) ---
+	BreakFlush        :: proc(State: ^break_state) ---
+	Break             :: proc(State: ^break_state, Break: ^break_type) -> b32 ---
+	CodepointToGlyph  :: proc(Font: ^font, Codepoint: rune) -> glyph ---
+	InferScript       :: proc(Direction: ^direction, Script: ^script, GlyphScript: script) ---
+}
+
+@(require_results)
+PlaceShapeState :: proc "c" (Memory: []byte) -> ^shape_state {
+	@(default_calling_convention="c", require_results)
+	foreign lib {
+		kbts_PlaceShapeState :: proc(Address: rawptr, Size: un) -> ^shape_state ---
+	}
+
+	return kbts_PlaceShapeState(raw_data(Memory), un(len(Memory)))
+}
+
+@(require_results)
+DecodeUtf8 :: proc "contextless" (String: string) -> (Codepoint: rune, SourceCharactersConsumed: u32, Valid: bool) {
+	decode :: struct {
+		Codepoint: rune,
+
+		SourceCharactersConsumed: u32,
+		Valid:                    b32,
+	}
+
+	@(default_calling_convention="c", require_results)
+	foreign lib {
+		kbts_DecodeUtf8 :: proc(Utf8: [^]byte, Length: uint) -> decode ---
+	}
+
+	Decode := kbts_DecodeUtf8(raw_data(String), len(String))
+	return Decode.Codepoint, Decode.SourceCharactersConsumed, bool(Decode.Valid)
+}
+
+
+@(require_results)
+ReadFontHeader :: proc "c" (Font: ^font, Data: []byte) -> un {
+	@(default_calling_convention="c", require_results)
+	foreign lib {
+		kbts_ReadFontHeader :: proc(Font: ^font, Data: rawptr, Size: un) -> un ---
+	}
+
+	return kbts_ReadFontHeader(Font, raw_data(Data), un(len(Data)))
+}
+@(require_results)
+ReadFontData :: proc "c" (Font: ^font, Scratch: []byte) -> un {
+	@(default_calling_convention="c", require_results)
+	foreign lib {
+		kbts_ReadFontData :: proc(Font: ^font, Scratch: rawptr, ScratchSize: un) -> un ---
+	}
+
+	return kbts_ReadFontData(Font, raw_data(Scratch), un(len(Scratch)))
+}
+@(require_results)
+PostReadFontInitialize :: proc "c" (Font: ^font, Memory: []byte) -> b32 {
+	@(default_calling_convention="c", require_results)
+	foreign lib {
+		kbts_PostReadFontInitialize :: proc(Font: ^font, Memory: rawptr, MemorySize: un) -> b32 ---
+	}
+
+	return kbts_PostReadFontInitialize(Font, raw_data(Memory), un(len(Memory)))
+}
+
+@(require_results)
+FontFromMemory :: proc(Data: []byte, allocator: mem.Allocator) -> (Result: font, Err: mem.Allocator_Error) {
+	ClonedData := mem.make_aligned([]byte, len(Data), 16, allocator) or_return
+	defer if Err != nil {
+		delete(ClonedData, allocator)
+	}
+	copy(ClonedData, Data)
+
+	ScratchSize := ReadFontHeader(&Result, ClonedData)
+	Scratch := mem.make_aligned([]byte, ScratchSize, 16, allocator) or_return
+	MemorySize := ReadFontData(&Result, Scratch)
+
+	Memory := Scratch
+	if MemorySize > ScratchSize {
+		delete(Scratch, allocator)
+		Memory = mem.make_aligned([]byte, MemorySize, 16, allocator) or_return
+	}
+	defer if Err != nil {
+		delete(Memory, allocator)
+	}
+
+	_ = PostReadFontInitialize(&Result, Memory)
+	return
+
+}
+FreeFont :: proc(Font: ^font, allocator: mem.Allocator) {
+	free(Font.FileBase, allocator)
+	free(Font.GlyphLookupMatrix, allocator)
+	Font^ = {}
+}
+
+@(require_results)
+CreateShapeState :: proc(Font: ^font, allocator: mem.Allocator) -> (Result: ^shape_state, Err: mem.Allocator_Error) {
+	Size := SizeOfShapeState(Font)
+	Memory := mem.make_aligned([]byte, Size, 16, allocator) or_return
+	Result = PlaceShapeState(Memory)
+	return
+}
+FreeShapeState :: proc(State: ^shape_state, allocator: mem.Allocator) {
+	free(State, allocator)
+}
+
+@(require_results)
+PositionGlyph :: proc(Cursor: ^cursor, Glyph: ^glyph) -> (X, Y: i32) {
+	@(default_calling_convention="c", require_results)
+	foreign lib {
+		kbts_PositionGlyph :: proc(Cursor: ^cursor, Glyph: ^glyph, X, Y: ^i32) ---
+	}
+	kbts_PositionGlyph(Cursor, Glyph, &X, &Y)
+	return
+}