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Add graphics/opengl/texture

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This commit is contained in:
Hajime Hoshi 2013-10-27 19:27:59 +09:00
parent 37746fc323
commit af1e77eced
3 changed files with 35 additions and 27 deletions
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27
graphics/opengl/context.go
View File

@ -9,9 +9,10 @@ import (
"fmt"
"github.com/hajimehoshi/go-ebiten/graphics"
"github.com/hajimehoshi/go-ebiten/graphics/matrix"
"github.com/hajimehoshi/go-ebiten/graphics/opengl/texture"
"github.com/hajimehoshi/go-ebiten/graphics/opengl/shader"
"github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
"github.com/hajimehoshi/go-ebiten/graphics/texture"
gtexture "github.com/hajimehoshi/go-ebiten/graphics/texture"
"image"
"math"
)
@ -21,7 +22,7 @@ type Context struct {
screenWidth int
screenHeight int
screenScale int
textures map[graphics.TextureId]*texture.Texture
textures map[graphics.TextureId]*gtexture.Texture
renderTargets map[graphics.RenderTargetId]*rendertarget.RenderTarget
renderTargetToTexture map[graphics.RenderTargetId]graphics.TextureId
mainFramebufferTexture *rendertarget.RenderTarget
@ -33,7 +34,7 @@ func newContext(screenWidth, screenHeight, screenScale int) *Context {
screenWidth: screenWidth,
screenHeight: screenHeight,
screenScale: screenScale,
textures: map[graphics.TextureId]*texture.Texture{},
textures: map[graphics.TextureId]*gtexture.Texture{},
renderTargets: map[graphics.RenderTargetId]*rendertarget.RenderTarget{},
renderTargetToTexture: map[graphics.RenderTargetId]graphics.TextureId{},
}
@ -47,10 +48,10 @@ func (context *Context) Init() {
C.glGetIntegerv(C.GL_FRAMEBUFFER_BINDING, &mainFramebuffer)
var err error
context.mainFramebufferTexture, err = newRenderTargetWithFramebuffer(
context.mainFramebufferTexture, err = texture.NewRenderTargetWithFramebuffer(
context.screenWidth*context.screenScale,
context.screenHeight*context.screenScale,
C.GLuint(mainFramebuffer))
texture.Framebuffer(mainFramebuffer))
if err != nil {
panic("creating main framebuffer failed: " + err.Error())
}
@ -61,7 +62,7 @@ func (context *Context) Init() {
panic("initializing the offscreen failed: " + err.Error())
}
screen := context.renderTargets[context.screenId]
C.glBindTexture(C.GL_TEXTURE_2D, screen.Texture().Native().(C.GLuint))
C.glBindTexture(C.GL_TEXTURE_2D, C.GLuint(screen.Texture().Native().(texture.Native)))
C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MAG_FILTER, C.GL_NEAREST)
C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MIN_FILTER, C.GL_NEAREST)
C.glBindTexture(C.GL_TEXTURE_2D, 0)
@ -92,8 +93,8 @@ func (context *Context) DrawTexture(
if !ok {
panic("invalid texture ID")
}
tex.Draw(func(native interface{}, quads []texture.Quad) {
shader.DrawTexture(shader.Texture(native.(C.GLuint)),
tex.Draw(func(native interface{}, quads []gtexture.Quad) {
shader.DrawTexture(native.(texture.Native),
context.projectionMatrix, quads,
geometryMatrix, colorMatrix)
})
@ -106,8 +107,8 @@ func (context *Context) DrawTextureParts(
if !ok {
panic("invalid texture ID")
}
tex.DrawParts(parts, func(native interface{}, quads []texture.Quad) {
shader.DrawTexture(shader.Texture(native.(C.GLuint)),
tex.DrawParts(parts, func(native interface{}, quads []gtexture.Quad) {
shader.DrawTexture(native.(texture.Native),
context.projectionMatrix, quads,
geometryMatrix, colorMatrix)
})
@ -125,7 +126,7 @@ func (context *Context) SetOffscreen(renderTargetId graphics.RenderTargetId) {
func (context *Context) setOffscreen(renderTarget *rendertarget.RenderTarget) {
C.glFlush()
framebuffer := renderTarget.Framebuffer().(C.GLuint)
framebuffer := C.GLuint(renderTarget.Framebuffer().(texture.Framebuffer))
C.glBindFramebuffer(C.GL_FRAMEBUFFER, framebuffer)
err := C.glCheckFramebufferStatus(C.GL_FRAMEBUFFER)
if err != C.GL_FRAMEBUFFER_COMPLETE {
@ -178,7 +179,7 @@ func (context *Context) flush() {
func (context *Context) NewRenderTarget(width, height int) (
graphics.RenderTargetId, error) {
renderTarget, err := newRenderTarget(width, height)
renderTarget, err := texture.NewRenderTarget(width, height)
if err != nil {
return 0, nil
}
@ -198,7 +199,7 @@ func (context *Context) NewRenderTarget(width, height int) (
func (context *Context) NewTextureFromImage(img image.Image) (
graphics.TextureId, error) {
texture, err := texture.NewFromImage(img, createFromImage)
texture, err := texture.NewFromImage(img)
if err != nil {
return 0, err
}

7
graphics/opengl/shader/program.go
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@ -7,7 +7,8 @@ package shader
import "C"
import (
"github.com/hajimehoshi/go-ebiten/graphics/matrix"
"github.com/hajimehoshi/go-ebiten/graphics/texture"
"github.com/hajimehoshi/go-ebiten/graphics/opengl/texture"
gtexture "github.com/hajimehoshi/go-ebiten/graphics/texture"
"unsafe"
)
@ -161,9 +162,7 @@ func use(projectionMatrix [16]float32, geometryMatrix matrix.Geometry, colorMatr
return program
}
type Texture C.GLuint
func DrawTexture(native Texture, projectionMatrix [16]float32, quads []texture.Quad,
func DrawTexture(native texture.Native, projectionMatrix [16]float32, quads []gtexture.Quad,
geometryMatrix matrix.Geometry, colorMatrix matrix.Color) {
if !initialized {
initialize()

28
graphics/opengl/texture.go → graphics/opengl/texture/texture.go
View File

@ -1,4 +1,4 @@
package opengl
package texture
// #cgo LDFLAGS: -framework OpenGL
//
@ -6,12 +6,14 @@ package opengl
import "C"
import (
"github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
"github.com/hajimehoshi/go-ebiten/graphics/texture"
gtexture "github.com/hajimehoshi/go-ebiten/graphics/texture"
"image"
"unsafe"
)
func createNativeTexture(textureWidth, textureHeight int, pixels []uint8) C.GLuint {
type Native C.GLuint
func createNativeTexture(textureWidth, textureHeight int, pixels []uint8) Native {
nativeTexture := C.GLuint(0)
C.glGenTextures(1, (*C.GLuint)(&nativeTexture))
@ -33,7 +35,7 @@ func createNativeTexture(textureWidth, textureHeight int, pixels []uint8) C.GLui
C.GLsizei(textureWidth), C.GLsizei(textureHeight),
0, C.GL_RGBA, C.GL_UNSIGNED_BYTE, ptr)
return nativeTexture
return Native(nativeTexture)
}
func create(textureWidth, textureHeight int) (interface{}, error) {
@ -45,17 +47,19 @@ func createFromImage(img *image.NRGBA) (interface{}, error) {
return createNativeTexture(size.X, size.Y, img.Pix), nil
}
func newRenderTarget(width, height int) (*rendertarget.RenderTarget, error) {
texture, err := texture.New(width, height, create)
type Framebuffer C.GLuint
func NewRenderTarget(width, height int) (*rendertarget.RenderTarget, error) {
texture, err := gtexture.New(width, height, create)
if err != nil {
return nil, err
}
framebuffer := createFramebuffer(texture.Native().(C.GLuint))
return rendertarget.NewWithFramebuffer(texture, framebuffer), nil
framebuffer := createFramebuffer(C.GLuint(texture.Native().(Native)))
return rendertarget.NewWithFramebuffer(texture, Framebuffer(framebuffer)), nil
}
func newRenderTargetWithFramebuffer(width, height int, framebuffer C.GLuint) (*rendertarget.RenderTarget, error) {
texture, err := texture.New(width, height, create)
func NewRenderTargetWithFramebuffer(width, height int, framebuffer Framebuffer) (*rendertarget.RenderTarget, error) {
texture, err := gtexture.New(width, height, create)
if err != nil {
return nil, err
}
@ -79,3 +83,7 @@ func createFramebuffer(nativeTexture C.GLuint) C.GLuint {
return framebuffer
}
func NewFromImage(img image.Image) (*gtexture.Texture, error) {
return gtexture.NewFromImage(img, createFromImage)
}