graphics: Reduce calls of glUniformMatrix4fv

This commit is contained in:
Hajime Hoshi 2016-06-05 00:32:57 +09:00
parent bddd3c9467
commit 4812f2e76e
2 changed files with 39 additions and 2 deletions

View File

@ -269,6 +269,24 @@ func (i *imageImpl) DrawImage(image *Image, options *DrawImageOptions) error {
parts = &wholeImage{image.impl.width, image.impl.height}
}
}
geom := &options.GeoM
colorm := &options.ColorM
dxf := geom.Element(0, 2)
dyf := geom.Element(1, 2)
// If possible, avoid using a geometry matrix so that we can reduce calls of
// glUniformMatrix4fv.
if geom.Element(0, 0) == 1 && geom.Element(1, 0) == 0 && geom.Element(0, 1) == 0 && geom.Element(1, 1) == 1 && (dxf != 0 && dyf != 0) {
if dxf == float64(int64(dxf)) && dyf == float64(int64(dyf)) {
dx := int(dxf)
dy := int(dyf)
parts = &transitionImageParts{
parts: parts,
dx: dx,
dy: dy,
}
geom = &GeoM{}
}
}
quads := &textureQuads{parts: parts, width: image.impl.width, height: image.impl.height}
// TODO: Reuse one vertices instead of making here, but this would need locking.
vertices := make([]int16, parts.Len()*16)
@ -286,8 +304,8 @@ func (i *imageImpl) DrawImage(image *Image, options *DrawImageOptions) error {
return errors.New("ebiten: image is already disposed")
}
i.pixels = nil
m := opengl.CompositeMode(options.CompositeMode)
return i.framebuffer.DrawTexture(ui.GLContext(), image.impl.texture, vertices[:16*n], &options.GeoM, &options.ColorM, m)
mode := opengl.CompositeMode(options.CompositeMode)
return i.framebuffer.DrawTexture(ui.GLContext(), image.impl.texture, vertices[:16*n], geom, colorm, mode)
}
if theDelayedImageTasks.add(f) {
return nil

View File

@ -124,3 +124,22 @@ func (t *textureQuads) vertices(vertices []int16) int {
}
return n
}
type transitionImageParts struct {
parts ImageParts
dx int
dy int
}
func (t *transitionImageParts) Len() int {
return t.parts.Len()
}
func (t *transitionImageParts) Dst(index int) (int, int, int, int) {
x0, y0, x1, y1 := t.parts.Dst(index)
return x0 + t.dx, y0 + t.dy, x1 + t.dx, y1 + t.dy
}
func (t *transitionImageParts) Src(index int) (int, int, int, int) {
return t.parts.Src(index)
}