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graphics: Avoid calling Len() too many times

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This commit is contained in:
Hajime Hoshi 2016-02-16 01:51:34 +09:00
parent 537cfea8a4
commit f5b4179142
1 changed files with 4 additions and 3 deletions
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7
internal/graphics/draw.go
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@ -48,10 +48,11 @@ func drawTexture(c *opengl.Context, texture opengl.Texture, projectionMatrix *[4
shadersInitialized = true shadersInitialized = true
} }
if quads.Len() == 0 { l := quads.Len()
if l == 0 {
return nil return nil
} }
if quadsMaxNum < quads.Len() { if quadsMaxNum < l {
return errors.New(fmt.Sprintf("len(quads) must be equal to or less than %d", quadsMaxNum)) return errors.New(fmt.Sprintf("len(quads) must be equal to or less than %d", quadsMaxNum))
} }
@ -66,7 +67,7 @@ func drawTexture(c *opengl.Context, texture opengl.Texture, projectionMatrix *[4
p.begin() p.begin()
defer p.end() defer p.end()
for i := 0; i < quads.Len(); i++ { for i := 0; i < l; i++ {
x0, y0, x1, y1 := quads.Vertex(i) x0, y0, x1, y1 := quads.Vertex(i)
u0, v0, u1, v1 := quads.Texture(i) u0, v0, u1, v1 := quads.Texture(i)
vertices[16*i] = int16(x0) vertices[16*i] = int16(x0)