Refactoring

graphics/opengl/context.go

@@ -8,11 +8,11 @@ import "C"
 import (
 	"github.com/hajimehoshi/go-ebiten/graphics"
 	"github.com/hajimehoshi/go-ebiten/graphics/matrix"
-	"github.com/hajimehoshi/go-ebiten/graphics/opengl/rendertarget"
-	"github.com/hajimehoshi/go-ebiten/graphics/opengl/shader"
+	"github.com/hajimehoshi/go-ebiten/graphics/opengl/offscreen"
+	// "github.com/hajimehoshi/go-ebiten/graphics/opengl/shader"
 	"github.com/hajimehoshi/go-ebiten/graphics/opengl/texture"
 	grendertarget "github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
-	gtexture "github.com/hajimehoshi/go-ebiten/graphics/texture"
+	// gtexture "github.com/hajimehoshi/go-ebiten/graphics/texture"
 	"image"
 	"math"
 )
@@ -23,8 +23,9 @@ type Context struct {
 	screenHeight int
 	screenScale  int
 	ids          *ids
-	mainFramebufferTexture *grendertarget.RenderTarget
-	projectionMatrix       [16]float32
+	//mainFramebufferTexture *grendertarget.RenderTarget
+	//projectionMatrix [16]float32
+	offscreen        *offscreen.Offscreen
 }
 
 func newContext(screenWidth, screenHeight, screenScale int) *Context {
@@ -33,22 +34,10 @@ func newContext(screenWidth, screenHeight, screenScale int) *Context {
 		screenHeight: screenHeight,
 		screenScale:  screenScale,
 		ids:          newIds(),
+		offscreen:    offscreen.New(screenWidth, screenHeight, screenScale),
 	}
 
-	// The main framebuffer should be created sooner than any other
-	// framebuffers!
-	mainFramebuffer := C.GLint(0)
-	C.glGetIntegerv(C.GL_FRAMEBUFFER_BINDING, &mainFramebuffer)
-
 	var err error
-	context.mainFramebufferTexture, err = rendertarget.NewWithFramebuffer(
-		context.screenWidth*context.screenScale,
-		context.screenHeight*context.screenScale,
-		rendertarget.Framebuffer(mainFramebuffer))
-	if err != nil {
-		panic("creating main framebuffer failed: " + err.Error())
-	}
-
 	context.screenId, err = context.createRenderTarget(
 		context.screenWidth, context.screenHeight, texture.FilterNearest)
 	if err != nil {
@@ -82,22 +71,14 @@ func (context *Context) DrawTexture(
 	textureId graphics.TextureId,
 	geometryMatrix matrix.Geometry, colorMatrix matrix.Color) {
 	tex := context.ids.TextureAt(textureId)
-	tex.Draw(func(native interface{}, quads []gtexture.Quad) {
-		shader.DrawTexture(native.(texture.Native),
-			context.projectionMatrix, quads,
-			geometryMatrix, colorMatrix)
-	})
+	context.offscreen.DrawTexture(tex, geometryMatrix, colorMatrix)
 }
 
 func (context *Context) DrawTextureParts(
 	textureId graphics.TextureId, parts []graphics.TexturePart,
 	geometryMatrix matrix.Geometry, colorMatrix matrix.Color) {
 	tex := context.ids.TextureAt(textureId)
-	tex.DrawParts(parts, func(native interface{}, quads []gtexture.Quad) {
-		shader.DrawTexture(native.(texture.Native),
-			context.projectionMatrix, quads,
-			geometryMatrix, colorMatrix)
-	})
+	context.offscreen.DrawTextureParts(tex, parts, geometryMatrix, colorMatrix)
 }
 
 func (context *Context) Init() {
@@ -115,19 +96,16 @@ func (context *Context) SetOffscreen(renderTargetId graphics.RenderTargetId) {
 }
 
 func (context *Context) setOffscreen(rt *grendertarget.RenderTarget) {
-	C.glFlush()
+	/*C.glFlush()
 
-	setter := &OffscreenSetter{
-		context.screenHeight,
-		context.screenScale,
-		rt == context.mainFramebufferTexture,
-		&context.projectionMatrix,
-	}
-	rt.SetAsOffscreen(setter)
+	rt.SetAsOffscreen(context.offscreen)
+	context.projectionMatrix = setter.projectionMatrix*/
+	context.offscreen.Set(rt)
 }
 
 func (context *Context) setMainFramebufferOffscreen() {
-	context.setOffscreen(context.mainFramebufferTexture)
+	//context.setOffscreen(context.mainFramebufferTexture)
+	context.offscreen.SetMainFramebuffer()
 }
 
 func (context *Context) flush() {

graphics/opengl/offscreen.go

@@ -1,48 +0,0 @@
-package opengl
-
-// #cgo LDFLAGS: -framework OpenGL
-//
-// #include <stdlib.h>
-// #include <OpenGL/gl.h>
-import "C"
-import (
-	"fmt"
-	"github.com/hajimehoshi/go-ebiten/graphics"
-	"github.com/hajimehoshi/go-ebiten/graphics/opengl/rendertarget"
-)
-
-type OffscreenSetter struct {
-	screenHeight int
-	screenScale int
-	usingMainFramebuffer bool
-	projectionMatrix *[16]float32
-}
-
-func (s *OffscreenSetter) Set(framebuffer interface{}, x, y, width, height int) {
-	f := framebuffer.(rendertarget.Framebuffer)
-	C.glBindFramebuffer(C.GL_FRAMEBUFFER, C.GLuint(f))
-	err := C.glCheckFramebufferStatus(C.GL_FRAMEBUFFER)
-	if err != C.GL_FRAMEBUFFER_COMPLETE {
-		panic(fmt.Sprintf("glBindFramebuffer failed: %d", err))
-	}
-
-	C.glBlendFuncSeparate(C.GL_SRC_ALPHA, C.GL_ONE_MINUS_SRC_ALPHA,
-		C.GL_ZERO, C.GL_ONE)
-
-	C.glViewport(C.GLint(x), C.GLint(y),
-		C.GLsizei(width), C.GLsizei(height))
-
-	matrix := graphics.OrthoProjectionMatrix(x, width, y, height)
-	if s.usingMainFramebuffer {
-		actualScreenHeight := s.screenHeight * s.screenScale
-		// Flip Y and move to fit with the top of the window.
-		matrix[1][1] *= -1
-		matrix[1][3] += float64(actualScreenHeight) / float64(height) * 2
-	}
-
-	for j := 0; j < 4; j++ {
-		for i := 0; i < 4; i++ {
-			s.projectionMatrix[i+j*4] = float32(matrix[i][j])
-		}
-	}
-}

graphics/opengl/offscreen/offscreen.go

@@ -0,0 +1,115 @@
+package offscreen
+
+// #cgo LDFLAGS: -framework OpenGL
+//
+// #include <stdlib.h>
+// #include <OpenGL/gl.h>
+import "C"
+import (
+	"fmt"
+	"github.com/hajimehoshi/go-ebiten/graphics"
+	"github.com/hajimehoshi/go-ebiten/graphics/matrix"
+	"github.com/hajimehoshi/go-ebiten/graphics/opengl/rendertarget"
+	"github.com/hajimehoshi/go-ebiten/graphics/opengl/shader"
+	"github.com/hajimehoshi/go-ebiten/graphics/opengl/texture"
+	grendertarget "github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
+	gtexture "github.com/hajimehoshi/go-ebiten/graphics/texture"
+)
+
+type Offscreen struct {
+	screenHeight           int
+	screenScale            int
+	mainFramebufferTexture *grendertarget.RenderTarget
+	projectionMatrix       [16]float32
+}
+
+func New(screenWidth, screenHeight, screenScale int) *Offscreen {
+	offscreen := &Offscreen{
+		screenHeight: screenHeight,
+		screenScale:  screenScale,
+	}
+
+	// The main framebuffer should be created sooner than any other
+	// framebuffers!
+	mainFramebuffer := C.GLint(0)
+	C.glGetIntegerv(C.GL_FRAMEBUFFER_BINDING, &mainFramebuffer)
+
+	var err error
+	offscreen.mainFramebufferTexture, err = rendertarget.NewWithFramebuffer(
+		screenWidth*screenScale,
+		screenHeight*screenScale,
+		rendertarget.Framebuffer(mainFramebuffer))
+	if err != nil {
+		panic("creating main framebuffer failed: " + err.Error())
+	}
+
+	return offscreen
+}
+
+func (o *Offscreen) Set(rt *grendertarget.RenderTarget) {
+	C.glFlush()
+	rt.SetAsOffscreen(&setter{o, rt == o.mainFramebufferTexture})
+}
+
+func (o *Offscreen) SetMainFramebuffer() {
+	o.Set(o.mainFramebufferTexture)
+}
+
+func (o *Offscreen) DrawTexture(texture *gtexture.Texture,
+	geometryMatrix matrix.Geometry, colorMatrix matrix.Color) {
+	d := &drawable{o, geometryMatrix, colorMatrix}
+	texture.Draw(d.Draw)
+}
+
+func (o *Offscreen) DrawTextureParts(texture *gtexture.Texture,
+	parts []graphics.TexturePart,
+	geometryMatrix matrix.Geometry, colorMatrix matrix.Color) {
+	d := &drawable{o, geometryMatrix, colorMatrix}
+	texture.DrawParts(parts, d.Draw)
+}
+
+type setter struct {
+	offscreen            *Offscreen
+	usingMainFramebuffer bool
+}
+
+func (s *setter) Set(framebuffer interface{}, x, y, width, height int) {
+	f := framebuffer.(rendertarget.Framebuffer)
+	C.glBindFramebuffer(C.GL_FRAMEBUFFER, C.GLuint(f))
+	err := C.glCheckFramebufferStatus(C.GL_FRAMEBUFFER)
+	if err != C.GL_FRAMEBUFFER_COMPLETE {
+		panic(fmt.Sprintf("glBindFramebuffer failed: %d", err))
+	}
+
+	C.glBlendFuncSeparate(C.GL_SRC_ALPHA, C.GL_ONE_MINUS_SRC_ALPHA,
+		C.GL_ZERO, C.GL_ONE)
+
+	C.glViewport(C.GLint(x), C.GLint(y),
+		C.GLsizei(width), C.GLsizei(height))
+
+	matrix := graphics.OrthoProjectionMatrix(x, width, y, height)
+	if s.usingMainFramebuffer {
+		actualScreenHeight := s.offscreen.screenHeight * s.offscreen.screenScale
+		// Flip Y and move to fit with the top of the window.
+		matrix[1][1] *= -1
+		matrix[1][3] += float64(actualScreenHeight) / float64(height) * 2
+	}
+
+	for j := 0; j < 4; j++ {
+		for i := 0; i < 4; i++ {
+			s.offscreen.projectionMatrix[i+j*4] = float32(matrix[i][j])
+		}
+	}
+}
+
+type drawable struct {
+	offscreen      *Offscreen
+	geometryMatrix matrix.Geometry
+	colorMatrix    matrix.Color
+}
+
+func (d *drawable) Draw(native interface{}, quads []gtexture.Quad) {
+	shader.DrawTexture(native.(texture.Native),
+		d.offscreen.projectionMatrix, quads,
+		d.geometryMatrix, d.colorMatrix)
+}

ui/cocoa/cocoa.go

@@ -80,14 +80,14 @@ func New(screenWidth, screenHeight, screenScale int, title string) *UI {
 	C.StartApplication()
 
 	context := C.CreateGLContext(unsafe.Pointer(nil))
-	C.SetCurrentGLContext(context);
+	C.SetCurrentGLContext(context)
 	ui.graphicsDevice = opengl.NewDevice(
 		ui.screenWidth,
 		ui.screenHeight,
 		ui.screenScale)
 
-	ui.window = C.CreateWindow(C.size_t(ui.screenWidth * ui.screenScale),
-		C.size_t(ui.screenHeight * ui.screenScale),
+	ui.window = C.CreateWindow(C.size_t(ui.screenWidth*ui.screenScale),
+		C.size_t(ui.screenHeight*ui.screenScale),
 		cTitle,
 		context)
 	currentUI = ui