122 lines
2.2 KiB
Plaintext
122 lines
2.2 KiB
Plaintext
#version 450
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#extension GL_EXT_buffer_reference : require
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struct String {
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vec2 pos;
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vec4 color;
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float size;
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uint offset;
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uint len;
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};
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layout(std430, buffer_reference) readonly buffer StringList {
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String s[];
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};
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struct Glyph {
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vec2 pos;
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vec4 color;
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float size;
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uint code;
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};
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layout(std430, buffer_reference) readonly buffer GlyphList {
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Glyph g[];
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};
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struct Rect {
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vec2 pos;
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vec2 size;
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vec4 color;
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};
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layout(std430, buffer_reference) readonly buffer RectList {
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Rect r[];
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};
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layout(std430, buffer_reference) readonly buffer CodeList {
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uint c[];
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};
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struct DrawCommand {
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uint vertex_count;
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uint instance_count;
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uint fist_vertex;
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uint first_instance;
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};
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struct DispatchCommand {
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uint x;
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uint y;
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uint z;
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};
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layout(std430, buffer_reference) buffer UILayer {
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StringList strings;
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CodeList codes;
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RectList rects;
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GlyphList glyphs;
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DrawCommand draw_glyphs;
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DrawCommand draw_rects;
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DispatchCommand dispatch_strings;
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uint font_index;
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};
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struct Symbol {
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int top;
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uint left;
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uint width;
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uint height;
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uint advance;
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};
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layout(std430, buffer_reference) buffer SymbolList {
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Symbol s[];
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};
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struct Font {
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SymbolList symbols;
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uint num_symbols;
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uint width;
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uint height;
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};
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layout(std430, buffer_reference) buffer FontList {
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Font f[];
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};
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layout(std430, buffer_reference) buffer UIContext {
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FontList fonts;
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mat4 screen;
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};
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layout(std430, push_constant) uniform PushConstant {
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UIContext context;
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UILayer layer;
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} pc;
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layout(local_size_x = 1) in;
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void main() {
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uint gID = gl_GlobalInvocationID.x;
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String string = pc.layer.strings.s[gID];
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Font font = pc.context.fonts.f[pc.layer.font_index];
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uint buffer_pos = atomicAdd(pc.layer.draw_glyphs.instance_count, string.len);
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float x = 0;
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for(uint i = 0; i < string.len; i++) {
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Symbol symbol = font.symbols.s[pc.layer.codes.c[string.offset + i]];
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pc.layer.glyphs.g[buffer_pos + i].pos = string.pos + vec2(x, 0);
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x += string.size*symbol.advance/font.width;
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pc.layer.glyphs.g[buffer_pos + i].size = string.size;
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pc.layer.glyphs.g[buffer_pos + i].color = string.color;
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pc.layer.glyphs.g[buffer_pos + i].code = pc.layer.codes.c[string.offset + i];
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}
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}
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