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This commit is contained in:
Hajime Hoshi 2014-12-08 01:07:39 +09:00
parent 43fbffebfb
commit 1c52a28a83
2 changed files with 15 additions and 0 deletions
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5
graphics/context.go
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@ -4,6 +4,7 @@ import (
"github.com/hajimehoshi/ebiten/graphics/matrix" "github.com/hajimehoshi/ebiten/graphics/matrix"
) )
// A Rect represents a rectangle.
type Rect struct { type Rect struct {
X int X int
Y int Y int
@ -11,16 +12,19 @@ type Rect struct {
Height int Height int
} }
// A TexturePart represents a part of a texture.
type TexturePart struct { type TexturePart struct {
LocationX int LocationX int
LocationY int LocationY int
Source Rect Source Rect
} }
// A Drawer is the interface that draws itself.
type Drawer interface { type Drawer interface {
Draw(parts []TexturePart, geometryMatrix matrix.Geometry, colorMatrix matrix.Color) Draw(parts []TexturePart, geometryMatrix matrix.Geometry, colorMatrix matrix.Color)
} }
// DrawWhole draws the whole texture.
func DrawWhole(drawer Drawer, width, height int, geo matrix.Geometry, color matrix.Color) { func DrawWhole(drawer Drawer, width, height int, geo matrix.Geometry, color matrix.Color) {
parts := []TexturePart{ parts := []TexturePart{
{0, 0, Rect{0, 0, width, height}}, {0, 0, Rect{0, 0, width, height}},
@ -28,6 +32,7 @@ func DrawWhole(drawer Drawer, width, height int, geo matrix.Geometry, color matr
drawer.Draw(parts, geo, color) drawer.Draw(parts, geo, color)
} }
// A Context is the interface that means a context of rendering.
type Context interface { type Context interface {
Clear() Clear()
Fill(r, g, b uint8) Fill(r, g, b uint8)

10
graphics/texturefactory.go
View File

@ -4,6 +4,8 @@ import (
"image" "image"
) )
// Filter represents the type of filter to be used when a texture or a render
// target is maginified or minified.
type Filter int type Filter int
const ( const (
@ -11,23 +13,30 @@ const (
FilterLinear FilterLinear
) )
// TextureID represents an ID of a texture.
type TextureID int type TextureID int
// RenderTargetID represents an ID of a render target.
// A render target is essentially same as a texture, but it is assumed that the // A render target is essentially same as a texture, but it is assumed that the
// all alpha of a render target is maximum. // all alpha of a render target is maximum.
type RenderTargetID int type RenderTargetID int
var currentTextureFactory TextureFactory var currentTextureFactory TextureFactory
// A TextureFactory is the interface that creates a render target or a texture.
// This method is for the library and a game developer doesn't have to use this.
type TextureFactory interface { type TextureFactory interface {
NewRenderTargetID(width, height int, filter Filter) (RenderTargetID, error) NewRenderTargetID(width, height int, filter Filter) (RenderTargetID, error)
NewTextureID(img image.Image, filter Filter) (TextureID, error) NewTextureID(img image.Image, filter Filter) (TextureID, error)
} }
// SetTextureFactory sets the current texture factory.
// This method is for the library and a game developer doesn't have to use this.
func SetTextureFactory(textureFactory TextureFactory) { func SetTextureFactory(textureFactory TextureFactory) {
currentTextureFactory = textureFactory currentTextureFactory = textureFactory
} }
// NewRenderTargetID returns an ID of a newly created render target.
func NewRenderTargetID(width, height int, filter Filter) (RenderTargetID, error) { func NewRenderTargetID(width, height int, filter Filter) (RenderTargetID, error) {
if currentTextureFactory == nil { if currentTextureFactory == nil {
panic("graphics.NewRenderTarget: currentTextureFactory is not set.") panic("graphics.NewRenderTarget: currentTextureFactory is not set.")
@ -35,6 +44,7 @@ func NewRenderTargetID(width, height int, filter Filter) (RenderTargetID, error)
return currentTextureFactory.NewRenderTargetID(width, height, filter) return currentTextureFactory.NewRenderTargetID(width, height, filter)
} }
// NewRenderTargetID returns an ID of a newly created texture.
func NewTextureID(img image.Image, filter Filter) (TextureID, error) { func NewTextureID(img image.Image, filter Filter) (TextureID, error) {
if currentTextureFactory == nil { if currentTextureFactory == nil {
panic("graphics.NewTexture: currentTextureFactory is not set") panic("graphics.NewTexture: currentTextureFactory is not set")