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gamecontext.go
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gamecontext.go
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// Copyright 2014 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ebiten
import (
"github.com/hajimehoshi/ebiten/internal/graphics"
"github.com/hajimehoshi/ebiten/internal/opengl"
"github.com/hajimehoshi/ebiten/internal/ui"
"image"
)
// IsKeyPressed returns a boolean indicating whether key is pressed.
func IsKeyPressed(key Key) bool {
return ui.IsKeyPressed(ui.Key(key))
}
// CursorPosition returns a position of a mouse cursor.
func CursorPosition() (x, y int) {
return ui.CursorPosition()
}
// IsMouseButtonPressed returns a boolean indicating whether mouseButton is pressed.
func IsMouseButtonPressed(mouseButton MouseButton) bool {
return ui.IsMouseButtonPressed(ui.MouseButton(mouseButton))
}
// NewImage returns an empty image.
func NewImage(width, height int, filter Filter) (*Image, error) {
var innerImage *innerImage
var err error
ui.Use(func(c *opengl.Context) {
var texture *graphics.Texture
texture, err = graphics.NewTexture(c, width, height, glFilter(c, filter))
if err != nil {
return
}
innerImage, err = newInnerImage(c, texture)
innerImage.Clear(c)
})
if err != nil {
return nil, err
}
return &Image{inner: innerImage}, nil
}
// NewImageFromImage creates a new image with the given image (img).
func NewImageFromImage(img image.Image, filter Filter) (*Image, error) {
var innerImage *innerImage
var err error
ui.Use(func(c *opengl.Context) {
var texture *graphics.Texture
texture, err = graphics.NewTextureFromImage(c, img, glFilter(c, filter))
if err != nil {
return
}
innerImage, err = newInnerImage(c, texture)
})
if err != nil {
return nil, err
}
return &Image{inner: innerImage}, nil
}