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graphics: Fix comments

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This commit is contained in:
Hajime Hoshi 2018-05-28 00:49:16 +09:00
parent 399f965729
commit 5e93d75ae0
1 changed files with 5 additions and 3 deletions
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8
internal/graphics/command.go
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@ -142,7 +142,8 @@ func (q *commandQueue) Flush() error {
// See BufferSubData in context_mobile.go.
opengl.GetContext().BufferSubData(opengl.ArrayBuffer, q.vertices[lastN:n])
}
// NOTE: WebGL doesn't seem to have Check gl.MAX_ELEMENTS_VERTICES or gl.MAX_ELEMENTS_INDICES so far.
// NOTE: WebGL doesn't seem to have gl.MAX_ELEMENTS_VERTICES or
// gl.MAX_ELEMENTS_INDICES so far.
// Let's use them to compare to len(quads) in the future.
if maxQuads < (n-lastN)*opengl.Float.SizeInBytes()/QuadVertexSizeInBytes() {
return fmt.Errorf("len(quads) must be equal to or less than %d", maxQuads)
@ -154,6 +155,9 @@ func (q *commandQueue) Flush() error {
return err
}
n := c.NumVertices() * opengl.Float.SizeInBytes() / QuadVertexSizeInBytes()
// TODO: indexOffsetInBytes should be reset if the command type is different
// from the previous one. This fix is needed when another drawing command is
// introduced than drawImageCommand.
indexOffsetInBytes += 6 * n * 2
}
if 0 < numc {
@ -203,8 +207,6 @@ func (c *drawImageCommand) Exec(indexOffsetInBytes int) error {
}
proj := f.projectionMatrix()
theOpenGLState.useProgram(proj, c.src.texture.native, c.dst, c.src, c.color, c.filter)
// TODO: We should call glBindBuffer here?
// The buffer is already bound at begin() but it is counterintuitive.
opengl.GetContext().DrawElements(opengl.Triangles, 6*n, indexOffsetInBytes)
// glFlush() might be necessary at least on MacBook Pro (a smilar problem at #419),