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bloeys
2023-01-17 04:28:44 +04:00
parent 7c3b766064
commit 6f3e38b41c
1 changed files with 3 additions and 4 deletions
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7
glyphs/glyphs.go
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@ -777,11 +777,10 @@ func NewGlyphRend(fontFile string, fontOptions *truetype.Options, screenWidth, s
return nil, err return nil, err
} }
// Multiple VBOs under one VAO, one VBO for vertex data (vertex attrib 0), and one VBO for forground data (vertex attrib 1+) // In each of these buffers we use one the mesh VBO for vertex position data (vertex attrib 0), and the other VBO created here for the rest.
// We split bg/fg into separate buffers and draw calls to ensure bg is drawn first, because order of drawing instanced items sent in the same
// call is not guaranteed
gr.GlyphFgInstancedBuf = buffers.NewBuffer() gr.GlyphFgInstancedBuf = buffers.NewBuffer()
// Background data uses another VAO because the bg buffer has the same type (ARRAY_BUFFER) as fg data, and two
// buffers of the same type can't go under VAO+attrib array locations
gr.GlyphBgInstancedBuf = buffers.NewBuffer() gr.GlyphBgInstancedBuf = buffers.NewBuffer()
// Create instanced buffers and set their vertex attributes. // Create instanced buffers and set their vertex attributes.