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Refactoring

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This commit is contained in:
Hajime Hoshi 2013-07-13 02:04:19 +09:00
parent 15c76624f1
commit 70723e1211
2 changed files with 33 additions and 63 deletions
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95
graphics/opengl/context.go
View File

@ -36,38 +36,33 @@ import (
)
type Context struct {
screen graphics.Texture
screen *Texture
screenScale int
textures map[graphics.TextureID]*Texture
currentOffscreenWidth int
currentOffscreenHeight int
currentOffscreen *Texture
projectionMatrix [16]float32
currentShaderProgram C.GLuint
mainFramebuffer C.GLuint
mainFramebufferTexture *Texture
framebuffers map[C.GLuint]C.GLuint
}
// This method should be called on the UI thread.
func newContext(screenWidth, screenHeight, screenScale int) *Context {
context := &Context{
screenScale: screenScale,
textures: map[graphics.TextureID]*Texture{},
mainFramebuffer: 0,
framebuffers: map[C.GLuint]C.GLuint{},
screenScale: screenScale,
textures: map[graphics.TextureID]*Texture{},
}
// main framebuffer should be created sooner than any other framebuffers!
mainFramebuffer := C.GLint(0)
C.glGetIntegerv(C.GL_FRAMEBUFFER_BINDING, &mainFramebuffer)
context.mainFramebuffer = C.GLuint(mainFramebuffer)
context.mainFramebufferTexture = newVirtualTexture(
screenWidth * screenScale,
screenHeight * screenScale)
screenWidth*screenScale,
screenHeight*screenScale)
context.mainFramebufferTexture.framebuffer = C.GLuint(mainFramebuffer)
initializeShaders()
context.screen = context.NewTexture(screenWidth, screenHeight)
context.screen = context.NewTexture(screenWidth, screenHeight).(*Texture)
return context
}
@ -93,8 +88,8 @@ func (context *Context) Fill(clr color.Color) {
}
func (context *Context) DrawRect(rect graphics.Rect, clr color.Color) {
width := float32(context.currentOffscreenWidth)
height := float32(context.currentOffscreenHeight)
width := float32(context.currentOffscreen.Width())
height := float32(context.currentOffscreen.Height())
textureWidth := float32(clp2(uint64(width)))
textureHeight := float32(clp2(uint64(height)))
@ -214,47 +209,38 @@ func abs(x int) int {
func (context *Context) SetOffscreen(textureID graphics.TextureID) {
texture := context.textures[textureID]
context.currentOffscreenWidth = texture.width
context.currentOffscreenHeight = texture.height
framebuffer := context.getFramebuffer(texture.id)
if framebuffer == context.mainFramebuffer {
panic("invalid framebuffer")
if texture.framebuffer == 0 {
texture.framebuffer = createFramebuffer(texture.id)
}
context.setOffscreenFramebuffer(framebuffer,
texture.textureWidth, texture.textureHeight)
context.setOffscreen(texture)
context.currentOffscreen = texture
}
func (context *Context) setOffscreenFramebuffer(framebuffer C.GLuint,
textureWidth, textureHeight int) {
if framebuffer == context.mainFramebuffer {
textureWidth = context.mainFramebufferTexture.textureWidth
textureHeight = context.mainFramebufferTexture.textureHeight
}
func (context *Context) setOffscreen(texture *Texture) {
C.glFlush()
C.glBindFramebuffer(C.GL_FRAMEBUFFER, framebuffer)
C.glBindFramebuffer(C.GL_FRAMEBUFFER, texture.framebuffer)
if err := C.glCheckFramebufferStatus(C.GL_FRAMEBUFFER); err != C.GL_FRAMEBUFFER_COMPLETE {
panic(fmt.Sprintf("glBindFramebuffer failed: %d", err))
}
C.glEnable(C.GL_BLEND)
C.glBlendFunc(C.GL_SRC_ALPHA, C.GL_ONE_MINUS_SRC_ALPHA)
C.glViewport(0, 0, C.GLsizei(abs(textureWidth)), C.GLsizei(abs(textureHeight)))
C.glViewport(0, 0, C.GLsizei(abs(texture.textureWidth)),
C.GLsizei(abs(texture.textureHeight)))
var e11, e22, e41, e42 float32
if framebuffer != context.mainFramebuffer {
e11 = float32(2) / float32(textureWidth)
e22 = float32(2) / float32(textureWidth)
if texture != context.mainFramebufferTexture {
e11 = float32(2) / float32(texture.textureWidth)
e22 = float32(2) / float32(texture.textureWidth)
e41 = -1
e42 = -1
} else {
height := float32(context.mainFramebufferTexture.Height())
e11 = float32(2) / float32(textureWidth)
e22 = -1 * float32(2) / float32(textureHeight)
height := float32(texture.Height())
e11 = float32(2) / float32(texture.textureWidth)
e22 = -1 * float32(2) / float32(texture.textureHeight)
e41 = -1
e42 = -1 + height/float32(textureHeight)*2
e42 = -1 + height/float32(texture.textureHeight)*2
}
context.projectionMatrix = [...]float32{
@ -266,9 +252,8 @@ func (context *Context) setOffscreenFramebuffer(framebuffer C.GLuint,
}
func (context *Context) resetOffscreen() {
context.setOffscreenFramebuffer(context.mainFramebuffer, 0, 0)
context.currentOffscreenWidth = context.mainFramebufferTexture.Width()
context.currentOffscreenHeight = context.mainFramebufferTexture.Height()
context.setOffscreen(context.mainFramebufferTexture)
context.currentOffscreen = context.mainFramebufferTexture
}
// This method should be called on the UI thread.
@ -338,18 +323,13 @@ func (context *Context) setShaderProgram(
1, (*C.GLfloat)(&glColorMatrixTranslation[0]))
}
func (context *Context) getFramebuffer(textureID C.GLuint) C.GLuint {
framebuffer, ok := context.framebuffers[textureID]
if ok {
return framebuffer
}
newFramebuffer := C.GLuint(0)
C.glGenFramebuffers(1, &newFramebuffer)
func createFramebuffer(textureID C.GLuint) C.GLuint {
framebuffer := C.GLuint(0)
C.glGenFramebuffers(1, &framebuffer)
origFramebuffer := C.GLint(0)
C.glGetIntegerv(C.GL_FRAMEBUFFER_BINDING, &origFramebuffer)
C.glBindFramebuffer(C.GL_FRAMEBUFFER, newFramebuffer)
C.glBindFramebuffer(C.GL_FRAMEBUFFER, framebuffer)
C.glFramebufferTexture2D(C.GL_FRAMEBUFFER, C.GL_COLOR_ATTACHMENT0,
C.GL_TEXTURE_2D, textureID, 0)
C.glBindFramebuffer(C.GL_FRAMEBUFFER, C.GLuint(origFramebuffer))
@ -357,18 +337,7 @@ func (context *Context) getFramebuffer(textureID C.GLuint) C.GLuint {
panic("creating framebuffer failed")
}
context.framebuffers[textureID] = newFramebuffer
return newFramebuffer
}
func (context *Context) deleteFramebuffer(textureID C.GLuint) {
framebuffer, ok := context.framebuffers[textureID]
if !ok {
// TODO: panic?
return
}
C.glDeleteFramebuffers(1, &framebuffer)
delete(context.framebuffers, textureID)
return framebuffer
}
func (context *Context) NewTexture(width, height int) graphics.Texture {

1
graphics/opengl/texture.go
View File

@ -63,6 +63,7 @@ type Texture struct {
height int
textureWidth int
textureHeight int
framebuffer C.GLuint
isVirtual bool
}