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graphics: Speed optimization

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This commit is contained in:
Hajime Hoshi 2016-05-29 23:04:20 +09:00
parent f6fd8f9c6d
commit 6663a447cc
1 changed files with 11 additions and 9 deletions
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20
internal/graphics/program.go
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@ -135,6 +135,16 @@ func (p *programContext) begin() {
c := p.context
if p.state.lastProgram != p.program {
c.UseProgram(p.program)
var zeroProgram opengl.Program
if p.state.lastProgram != zeroProgram {
c.DisableVertexAttribArray(p.state.lastProgram, "tex_coord")
c.DisableVertexAttribArray(p.state.lastProgram, "vertex")
}
c.EnableVertexAttribArray(p.program, "vertex")
c.EnableVertexAttribArray(p.program, "tex_coord")
c.VertexAttribPointer(p.program, "vertex", false, int16Size*4, 2, int16Size*0)
c.VertexAttribPointer(p.program, "tex_coord", true, int16Size*4, 2, int16Size*2)
p.state.lastProgram = p.state.programTexture
p.state.lastProjectionMatrix = nil
p.state.lastModelviewMatrix = nil
@ -207,16 +217,8 @@ func (p *programContext) begin() {
// We don't have to call gl.ActiveTexture here: GL_TEXTURE0 is the default active texture
// See also: https://www.opengl.org/sdk/docs/man2/xhtml/glActiveTexture.xml
c.BindTexture(p.texture)
c.EnableVertexAttribArray(p.program, "vertex")
c.EnableVertexAttribArray(p.program, "tex_coord")
c.VertexAttribPointer(p.program, "vertex", false, int16Size*4, 2, int16Size*0)
c.VertexAttribPointer(p.program, "tex_coord", true, int16Size*4, 2, int16Size*2)
}
func (p *programContext) end() {
c := p.context
c.DisableVertexAttribArray(p.program, "tex_coord")
c.DisableVertexAttribArray(p.program, "vertex")
}