mth/ebiten
1
0
Fork 0
mirror of https://github.com/hajimehoshi/ebiten.git synced 2025-02-03 22:44:28 +01:00
Code Issues Packages Projects Releases Wiki Activity

graphics: Reduce calls of glUniformMatrix4fv

Browse Source
This commit is contained in:
Hajime Hoshi 2016-06-05 23:32:25 +09:00
parent 26ef56232b
commit 33b50ed294
2 changed files with 23 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
image.go
View File

@ -252,6 +252,10 @@ func (i *imageImpl) Fill(clr color.Color) error {
return f() return f()
} }
func isWholeNumber(x float64) bool {
return x == float64(int64(x))
}
func (i *imageImpl) DrawImage(image *Image, options *DrawImageOptions) error { func (i *imageImpl) DrawImage(image *Image, options *DrawImageOptions) error {
// Calculate vertices before locking because the user can do anything in // Calculate vertices before locking because the user can do anything in
// options.ImageParts interface without deadlock (e.g. Call Image functions). // options.ImageParts interface without deadlock (e.g. Call Image functions).
@ -270,18 +274,22 @@ func (i *imageImpl) DrawImage(image *Image, options *DrawImageOptions) error {
} }
geom := &options.GeoM geom := &options.GeoM
colorm := &options.ColorM colorm := &options.ColorM
dxf := geom.Element(0, 2) scaleX := geom.Element(0, 0)
dyf := geom.Element(1, 2) scaleY := geom.Element(1, 1)
dx := geom.Element(0, 2)
dy := geom.Element(1, 2)
// If possible, avoid using a geometry matrix so that we can reduce calls of // If possible, avoid using a geometry matrix so that we can reduce calls of
// glUniformMatrix4fv. // 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 isWholeNumber(scaleX) && geom.Element(1, 0) == 0 &&
if dxf == float64(int64(dxf)) && dyf == float64(int64(dyf)) { geom.Element(0, 1) == 0 && isWholeNumber(scaleY) &&
dx := int(dxf) isWholeNumber(dx) && isWholeNumber(dy) {
dy := int(dyf) if scaleX != 1 || scaleY != 1 || dx != 0 || dy != 0 {
parts = &transitionImageParts{ parts = &transitionImageParts{
parts: parts, parts: parts,
dx: dx, scaleX: int(scaleX),
dy: dy, scaleY: int(scaleY),
dx: int(dx),
dy: int(dy),
} }
geom = &GeoM{} geom = &GeoM{}
} }

10
imageparts.go
View File

@ -126,9 +126,11 @@ func (t *textureQuads) vertices(vertices []int16) int {
} }
type transitionImageParts struct { type transitionImageParts struct {
parts ImageParts parts ImageParts
dx int scaleX int
dy int scaleY int
dx int
dy int
} }
func (t *transitionImageParts) Len() int { func (t *transitionImageParts) Len() int {
@ -137,7 +139,7 @@ func (t *transitionImageParts) Len() int {
func (t *transitionImageParts) Dst(index int) (int, int, int, int) { func (t *transitionImageParts) Dst(index int) (int, int, int, int) {
x0, y0, x1, y1 := t.parts.Dst(index) x0, y0, x1, y1 := t.parts.Dst(index)
return x0 + t.dx, y0 + t.dy, x1 + t.dx, y1 + t.dy return x0*t.scaleX + t.dx, y0*t.scaleY + t.dy, x1*t.scaleX + t.dx, y1*t.scaleY + t.dy
} }
func (t *transitionImageParts) Src(index int) (int, int, int, int) { func (t *transitionImageParts) Src(index int) (int, int, int, int) {