Misc changes (refactors, notes)
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package sectr
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import fstash "codebase:font/fontstash"
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@ -1,319 +0,0 @@
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package sectr
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import "core:os"
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import "core:strings"
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import "core:unicode"
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import sokol_gfx "thirdparty:sokol/gfx"
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import "thirdparty:freetype"
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Font_Provider_Use_Freetype :: true
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Font_Largest_Px_Size :: 32
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Font_Size_Interval :: 2
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// Font_Default :: ""
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Font_Default :: FontID { 0, "" }
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Font_Default_Point_Size :: 18.0
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Font_TTF_Default_Chars_Padding :: 4
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Font_Load_Use_Default_Size :: -1
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Font_Load_Gen_ID :: ""
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FontID :: struct {
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key : u64,
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label : string,
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}
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FontTag :: struct {
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key : FontID,
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point_size : f32
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}
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when Font_Provider_Use_Freetype
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{
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FontParserFontData :: struct {
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using face : freetype.Face,
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}
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FontParserData :: struct {
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lib : freetype.Library,
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}
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}
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FontGlyph :: struct {
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size : Vec2i,
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bearing : Vec2i,
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advance : u32,
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texture : sokol_gfx.Image,
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}
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FontDef :: struct {
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path_file : string,
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parser_info : FontParserFontData,
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glyphs : [256]FontGlyph,
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}
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FontProviderData :: struct {
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font_cache : HMapChained(FontDef),
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parser : FontParserData,
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glyph_shader : sokol_gfx.Shader,
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gfx_bindings : sokol_gfx.Bindings,
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gfx_pipeline : sokol_gfx.Pipeline,
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gfx_v_buffer : sokol_gfx.Buffer,
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gfx_uv_buffer : sokol_gfx.Buffer,
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gfx_sampler : sokol_gfx.Sampler,
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}
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Font_Quad_Vert_Size :: size_of(Vec2) * 6
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Font_Provider_Gfx_vBuffer_Size :: Font_Quad_Vert_Size * Kilo * 64
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font_provider_startup :: proc()
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{
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profile(#procedure)
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state := get_state()
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font_provider_data := & get_state().font_provider_data; using font_provider_data
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font_cache_alloc_error : AllocatorError
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font_cache, font_cache_alloc_error = make( HMapChained(FontDef), hmap_closest_prime(1 * Kilo), persistent_allocator() /*dbg_name = "font_cache"*/ )
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verify( font_cache_alloc_error == AllocatorError.None, "Failed to allocate font_cache" )
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log("font_cache created")
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when Font_Provider_Use_Freetype
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{
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result := freetype.init_free_type( & font_provider_data.parser.lib )
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if result != freetype.Error.Ok {
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fatal( "font_provider_setup: Failed to initialize freetype" )
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}
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}
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// Setup Graphics Pipeline
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{
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BlendFactor :: sokol_gfx.Blend_Factor
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BlendOp :: sokol_gfx.Blend_Op
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BlendState :: sokol_gfx.Blend_State
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BorderColor :: sokol_gfx.Border_Color
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BufferDesciption :: sokol_gfx.Buffer_Desc
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BufferUsage :: sokol_gfx.Usage
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BufferType :: sokol_gfx.Buffer_Type
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ColorTargetState :: sokol_gfx.Color_Target_State
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Filter :: sokol_gfx.Filter
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Range :: sokol_gfx.Range
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SamplerDescription :: sokol_gfx.Sampler_Desc
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Wrap :: sokol_gfx.Wrap
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VertexAttributeState :: sokol_gfx.Vertex_Attr_State
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VertexBufferLayoutState :: sokol_gfx.Vertex_Buffer_Layout_State
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VertexIndexType :: sokol_gfx.Index_Type
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VertexFormat :: sokol_gfx.Vertex_Format
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VertexLayoutState :: sokol_gfx.Vertex_Layout_State
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VertexStep :: sokol_gfx.Vertex_Step
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using font_provider_data
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backend := sokol_gfx.query_backend()
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glyph_shader = sokol_gfx.make_shader(font_glyph_shader_desc(backend))
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// Glyphs append to a large vertex buffer that must be able to hold all verts per frame, the budget is fixed.
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// TODO(Ed): Add a way to relase and remake the buffer when an overflow is detected for a frame.
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gfx_v_buffer = sokol_gfx.make_buffer( BufferDesciption {
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size = Font_Provider_Gfx_vBuffer_Size,
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usage = BufferUsage.DYNAMIC,
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type = BufferType.VERTEXBUFFER,
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})
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verify( sokol_gfx.query_buffer_state(gfx_v_buffer) != sokol_gfx.Resource_State.INVALID,
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"Failed to make font provider's gfx_v_buffer" )
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uv_coords : [6]Vec2 = {
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0 = { 0.0, 0.0 },
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1 = { 0.0, 1.0 },
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2 = { 1.0, 1.0 },
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3 = { 0.0, 0.0 },
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4 = { 1.0, 1.0 },
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5 = { 1.0, 0.0 },
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}
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// All quads will use the same vertex buffer for texture coordinates.
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gfx_uv_buffer = sokol_gfx.make_buffer( BufferDesciption {
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size = 0,
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usage = BufferUsage.IMMUTABLE,
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type = BufferType.VERTEXBUFFER,
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data = Range { & uv_coords[0], size_of(uv_coords) },
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})
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verify( sokol_gfx.query_buffer_state(gfx_uv_buffer) != sokol_gfx.Resource_State.INVALID,
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"Failed to make font provider's gfx_uv_buffer" )
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gfx_sampler = sokol_gfx.make_sampler( SamplerDescription {
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min_filter = Filter.NEAREST,
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mag_filter = Filter.NEAREST,
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mipmap_filter = Filter.NONE,
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wrap_u = Wrap.CLAMP_TO_EDGE,
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wrap_v = Wrap.CLAMP_TO_EDGE,
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border_color = BorderColor.OPAQUE_BLACK,
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})
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glyph_vs_layout : VertexLayoutState
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{
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using glyph_vs_layout
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attrs[ATTR_font_glyph_vs_vertex] = VertexAttributeState {
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format = VertexFormat.FLOAT2,
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offset = 0,
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buffer_index = ATTR_font_glyph_vs_vertex,
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}
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buffers[ATTR_font_glyph_vs_vertex] = VertexBufferLayoutState {
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stride = size_of(Vec2),
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step_func = VertexStep.PER_VERTEX,
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}
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attrs[ATTR_font_glyph_vs_texture_coord] = VertexAttributeState {
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format = VertexFormat.FLOAT2,
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offset = 0,
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buffer_index = ATTR_font_glyph_vs_texture_coord,
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}
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buffers[ATTR_font_glyph_vs_texture_coord] = VertexBufferLayoutState {
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stride = size_of(Vec2),
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step_func = VertexStep.PER_VERTEX,
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}
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}
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gfx_pipeline = sokol_gfx.make_pipeline(
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{
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shader = glyph_shader,
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layout = glyph_vs_layout,
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index_type = VertexIndexType.NONE,
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colors = {
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0 = ColorTargetState \
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{
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blend = BlendState {
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enabled = true,
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src_factor_rgb = BlendFactor.SRC_ALPHA,
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dst_factor_rgb = BlendFactor.ONE_MINUS_SRC_ALPHA,
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op_rgb = BlendOp.ADD,
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src_factor_alpha = BlendFactor.ONE,
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dst_factor_alpha = BlendFactor.ZERO,
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op_alpha = BlendOp.ADD,
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}
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},
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},
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color_count = 1,
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sample_count = 1,
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})
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}
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log("font_provider initialized")
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}
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font_provider_reload :: proc()
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{
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}
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font_provider_shutdown :: proc()
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{
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font_provider_data := & get_state().font_provider_data; using font_provider_data
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for & entry in font_cache.lookup
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{
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if entry == nil do continue
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def := entry.value
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// TODO(Ed): Free entry resources.
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}
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}
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when Font_Provider_Use_Freetype
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{
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font_load :: proc(path_file : string,
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default_size : f32 = Font_Load_Use_Default_Size,
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desired_id : string = Font_Load_Gen_ID
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) -> FontID
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{
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profile(#procedure)
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logf("Loading font: %v", path_file)
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font_provider_data := & get_state().font_provider_data; using font_provider_data
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font_data, read_succeded : = os.read_entire_file( path_file )
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verify( b32(read_succeded), str_fmt("Failed to read font file for: %v", path_file) )
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font_data_size := cast(i32) len(font_data)
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desired_id := desired_id
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// Use file name as key
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if len(desired_id) == 0 {
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// NOTE(Ed): This should never be used except for laziness so I'll be throwing a warning everytime.
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log("desired_key not provided, using file name. Give it a proper name!", LogLevel.Warning)
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// desired_id = cast(FontID) file_name_from_path(path_file)
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desired_id = file_name_from_path(path_file)
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}
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key := cast(u64) crc32( transmute([]byte) desired_id )
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def, set_error := hmap_chained_set(font_cache, key, FontDef{})
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verify( set_error == AllocatorError.None, "Failed to add new font entry to cache" )
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def.path_file = path_file
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face_index :: 0
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freetype.new_memory_face( font_provider_data.parser.lib, raw_data(font_data), font_data_size, face_index, & def.parser_info.face )
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// Hardcoding to 24 pt for testing (until we have a proper cached atlas)
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freetype.set_pixel_sizes( def.parser_info.face, 0, 72 )
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for ascii_code in 0 ..< 128
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{
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load_error := freetype.load_char(def.parser_info.face, u32(ascii_code), {freetype.Load_Flag.Render})
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verify( load_error == .Ok, "Failed to load character using freetype" )
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// using def.parser_info
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using def
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// glyph := parser_info.face.glyph
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// bitmap := & glyph.bitmap
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using parser_info.face.glyph
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codepoint := rune(ascii_code)
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if ! unicode.is_print(codepoint) || bitmap.width <= 0 do continue
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ImageDescription :: sokol_gfx.Image_Desc
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ImageUsage :: sokol_gfx.Usage
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Range :: sokol_gfx.Range
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PixelFormat :: sokol_gfx.Pixel_Format
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glyph_data : sokol_gfx.Image_Data
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glyph_data.subimage[0][0] = Range { bitmap.buffer, u64(bitmap.width * bitmap.rows) }
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desc := sokol_gfx.Image_Desc {
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type = sokol_gfx.Image_Type._2D,
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render_target = false,
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width = i32(bitmap.width),
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height = i32(bitmap.rows),
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num_slices = 1,
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num_mipmaps = 1,
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usage = ImageUsage.IMMUTABLE,
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pixel_format = PixelFormat.R8,
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sample_count = 0,
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data = glyph_data,
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label = strings.clone_to_cstring(str_fmt("font_ascii %v", ascii_code))
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}
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// width := i32(bitmap.width)
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// rows := i32(bitmap.rows)
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// logf("font_ascii : %v", ascii_code )
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// logf("font_ascii glyph: %v", rune(ascii_code) )
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sokol_img := sokol_gfx.make_image( desc )
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verify( sokol_gfx.query_image_state(sokol_img) != sokol_gfx.Resource_State.INVALID,
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"Failed to create image on sokol gfx" );
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def.glyphs[ascii_code] = FontGlyph {
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size = { i32(bitmap.width), i32(bitmap.rows) },
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bearing = { bitmap_left, bitmap_top },
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texture = sokol_img,
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advance = u32(advance.x),
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}
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}
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freetype.done_face( def.parser_info.face )
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fid := FontID { key, desired_id }
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return fid
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}
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}
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