115 lines
2.8 KiB
Go
115 lines
2.8 KiB
Go
/*
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Copyright (c) 2016, The go-imagequant author(s)
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Permission to use, copy, modify, and/or distribute this software for any purpose
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with or without fee is hereby granted, provided that the above copyright notice
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and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
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CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
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OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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*/
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package imagequant
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import (
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"errors"
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)
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/*
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#include "libimagequant.h"
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*/
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import "C"
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type Attributes struct {
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p *C.struct_liq_attr
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}
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// Callers MUST call Release() on the returned object to free memory.
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func NewAttributes() (*Attributes, error) {
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pAttr := C.liq_attr_create()
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if pAttr == nil { // nullptr
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return nil, errors.New("Unsupported platform")
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}
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return &Attributes{p: pAttr}, nil
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}
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const (
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COLORS_MIN = 2
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COLORS_MAX = 256
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)
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func (this *Attributes) SetMaxColors(colors int) error {
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return translateError(C.liq_set_max_colors(this.p, C.int(colors)))
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}
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func (this *Attributes) GetMaxColors() int {
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return int(C.liq_get_max_colors(this.p))
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}
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const (
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QUALITY_MIN = 0
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QUALITY_MAX = 100
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)
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func (this *Attributes) SetQuality(minimum, maximum int) error {
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return translateError(C.liq_set_quality(this.p, C.int(minimum), C.int(maximum)))
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}
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func (this *Attributes) GetMinQuality() int {
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return int(C.liq_get_min_quality(this.p))
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}
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func (this *Attributes) GetMaxQuality() int {
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return int(C.liq_get_max_quality(this.p))
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}
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const (
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SPEED_SLOWEST = 1
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SPEED_DEFAULT = 3
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SPEED_FASTEST = 10
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)
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func (this *Attributes) SetSpeed(speed int) error {
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return translateError(C.liq_set_speed(this.p, C.int(speed)))
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}
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func (this *Attributes) GetSpeed() int {
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return int(C.liq_get_speed(this.p))
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}
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func (this *Attributes) SetMinOpacity(min int) error {
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return translateError(C.liq_set_min_opacity(this.p, C.int(min)))
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}
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func (this *Attributes) GetMinOpacity() int {
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return int(C.liq_get_min_opacity(this.p))
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}
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func (this *Attributes) SetMinPosterization(bits int) error {
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return translateError(C.liq_set_min_posterization(this.p, C.int(bits)))
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}
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func (this *Attributes) GetMinPosterization() int {
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return int(C.liq_get_min_posterization(this.p))
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}
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func (this *Attributes) SetLastIndexTransparent(is_last int) {
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C.liq_set_last_index_transparent(this.p, C.int(is_last))
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}
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func (this *Attributes) CreateHistogram() *Histogram {
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ptr := C.liq_histogram_create(this.p)
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return &Histogram{p: ptr}
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}
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// Free memory. Callers must not use this object after Release has been called.
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func (this *Attributes) Release() {
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C.liq_attr_destroy(this.p)
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}
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