graphicscommand: Remove Texture

internal/graphicscommand/command.go

@@ -244,7 +244,7 @@ func (c *drawImageCommand) Exec(indexOffsetInBytes int) error {
 	proj := f.projectionMatrix()
 	dw, dh := c.dst.Size()
 	sw, sh := c.src.Size()
-	opengl.UseProgram(proj, c.src.texture.native, dw, dh, sw, sh, c.color, c.filter)
+	opengl.UseProgram(proj, c.src.texture, dw, dh, sw, sh, c.color, c.filter)
 	opengl.GetContext().DrawElements(c.nindices, indexOffsetInBytes)
 
 	// glFlush() might be necessary at least on MacBook Pro (a smilar problem at #419),
@@ -310,7 +310,7 @@ func (c *replacePixelsCommand) Exec(indexOffsetInBytes int) error {
 	// glFlush is necessary on Android.
 	// glTexSubImage2D didn't work without this hack at least on Nexus 5x and NuAns NEO [Reloaded] (#211).
 	opengl.GetContext().Flush()
-	opengl.GetContext().BindTexture(c.dst.texture.native)
+	opengl.GetContext().BindTexture(c.dst.texture)
 	opengl.GetContext().TexSubImage2D(c.pixels, c.x, c.y, c.width, c.height)
 	return nil
 }
@@ -389,8 +389,8 @@ func (c *disposeCommand) Exec(indexOffsetInBytes int) error {
 		c.target.framebuffer.native != opengl.GetContext().ScreenFramebuffer() {
 		opengl.GetContext().DeleteFramebuffer(c.target.framebuffer.native)
 	}
-	if c.target.texture != nil {
-		opengl.GetContext().DeleteTexture(c.target.texture.native)
+	if c.target.texture != *new(opengl.Texture) {
+		opengl.GetContext().DeleteTexture(c.target.texture)
 	}
 	return nil
 }
@@ -445,13 +445,11 @@ func (c *newImageCommand) Exec(indexOffsetInBytes int) error {
 	w := emath.NextPowerOf2Int(c.width)
 	h := emath.NextPowerOf2Int(c.height)
 	checkSize(w, h)
-	native, err := opengl.GetContext().NewTexture(w, h)
+	t, err := opengl.GetContext().NewTexture(w, h)
 	if err != nil {
 		return err
 	}
-	c.result.texture = &texture{
-		native: native,
-	}
+	c.result.texture = t
 	return nil
 }
 

internal/graphicscommand/framebuffer.go

@@ -27,8 +27,8 @@ type framebuffer struct {
 }
 
 // newFramebufferFromTexture creates a framebuffer from the given texture.
-func newFramebufferFromTexture(texture *texture, width, height int) (*framebuffer, error) {
-	native, err := opengl.GetContext().NewFramebuffer(texture.native)
+func newFramebufferFromTexture(texture opengl.Texture, width, height int) (*framebuffer, error) {
+	native, err := opengl.GetContext().NewFramebuffer(texture)
 	if err != nil {
 		return nil, err
 	}

internal/graphicscommand/image.go

@@ -42,7 +42,7 @@ func MaxImageSize() int {
 
 // Image represents an image that is implemented with OpenGL.
 type Image struct {
-	texture     *texture
+	texture     opengl.Texture
 	framebuffer *framebuffer
 	width       int
 	height      int
@@ -118,7 +118,7 @@ func (i *Image) ReplacePixels(p []byte, x, y, width, height int) {
 }
 
 func (i *Image) IsInvalidated() bool {
-	return !opengl.GetContext().IsTexture(i.texture.native)
+	return !opengl.GetContext().IsTexture(i.texture)
 }
 
 func (i *Image) createFramebufferIfNeeded() (*framebuffer, error) {

internal/graphicscommand/texture.go

@@ -1,24 +0,0 @@
-// 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 graphicscommand
-
-import (
-	"github.com/hajimehoshi/ebiten/internal/opengl"
-)
-
-// texture represents OpenGL's texture.
-type texture struct {
-	native opengl.Texture
-}