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Added rendering optimization hints to themes

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This commit is contained in:
Sasha Koshka 2023-02-16 18:00:15 -05:00
parent b9cbf83a18
commit fc0a9292d9
2 changed files with 49 additions and 0 deletions
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30
theme/default.go
View File

@ -209,6 +209,36 @@ func (Default) Inset (pattern Pattern, c Case) Inset {
}
}
// Hints returns rendering optimization hints for a particular pattern.
// These are optional, but following them may result in improved
// performance.
func (Default) Hints (pattern Pattern, c Case) (hints Hints) {
switch pattern {
case PatternRaised:
if c == C("basic", "listEntry") {
hints.StaticInset = Inset { 0, 1, 0, 1 }
} else {
hints.StaticInset = Inset { 3, 3, 3, 3 }
}
case PatternSunken:
if c == C("basic", "list") {
hints.StaticInset = Inset { 2, 1, 2, 1 }
} else {
hints.StaticInset = Inset { 3, 3, 3, 3 }
}
case
PatternPinboard,
PatternInput,
PatternButton,
PatternHandle:
hints.StaticInset = Inset { 3, 3, 3, 3 }
}
return
}
// Sink returns the default sink vector for the given pattern.
func (Default) Sink (pattern Pattern, c Case) image.Point {
return image.Point { 1, 1 }

19
theme/theme.go
View File

@ -1,6 +1,7 @@
package theme
import "image"
import "image/color"
import "golang.org/x/image/font"
import "git.tebibyte.media/sashakoshka/tomo/artist"
import "git.tebibyte.media/sashakoshka/tomo/canvas"
@ -56,6 +57,19 @@ type Pattern int; const (
PatternHandle
)
// Hints specifies rendering hints for a particular pattern. Elements can take
// these into account in order to gain extra performance.
type Hints struct {
// StaticInset defines an inset rectangular area in the middle of the
// pattern that does not change between PatternStates. If the inset is
// zero on all sides, this hint does not apply.
StaticInset Inset
// Uniform specifies a singular color for the entire pattern. If the
// alpha channel is zero, this hint does not apply.
Uniform color.RGBA
}
// Theme represents a visual style configuration,
type Theme interface {
// FontFace returns the proper font for a given style, size, and case.
@ -76,6 +90,11 @@ type Theme interface {
// content when it is pressed down (if applicable) to simulate a 3D
// sinking effect.
Sink (Pattern, Case) image.Point
// Hints returns rendering optimization hints for a particular pattern.
// These are optional, but following them may result in improved
// performance.
Hints (Pattern, Case) Hints
}
// Wrapped wraps any theme and injects a case into it automatically so that it