Delete a texture when deleting the render target

graphics/opengl/ids.go

@@ -85,13 +85,17 @@ func (i *ids) CreateRenderTarget(width, height int, filter graphics.Filter) (
 }
 
 func (i *ids) DeleteRenderTarget(id graphics.RenderTargetId) {
-	renderTarget := i.renderTargets[id]
-	renderTarget.Dispose()
-
 	i.lock.Lock()
 	defer i.lock.Unlock()
+
+	renderTarget := i.renderTargets[id]
+	textureId := i.renderTargetToTexture[id]
+	texture := i.textures[textureId]
+
+	renderTarget.Dispose()
+	texture.Dispose()
+
 	delete(i.renderTargets, id)
-
+	delete(i.renderTargetToTexture, id)
-	// TODO: Remove the related texture
+	delete(i.textures, textureId)
 }
-

graphics/opengl/rendertarget/render_target.go

@@ -77,6 +77,5 @@ func (r *RenderTarget) ProjectionMatrix() [4][4]float64 {
 }
 
 func (r *RenderTarget) Dispose() {
-	f := C.GLuint(r.framebuffer)
+	C.glDeleteFramebuffers(1, &r.framebuffer)
-	C.glDeleteFramebuffers(1, &f)
 }

graphics/opengl/texture/texture.go

@@ -23,7 +23,7 @@ func createNativeTexture(textureWidth, textureHeight int, pixels []uint8,
 	filter graphics.Filter) C.GLuint {
 	nativeTexture := C.GLuint(0)
 
-	C.glGenTextures(1, (*C.GLuint)(&nativeTexture))
+	C.glGenTextures(1, &nativeTexture)
 	if nativeTexture < 0 {
 		panic("glGenTexture failed")
 	}
@@ -87,3 +87,7 @@ func (t *Texture) DrawParts(parts []graphics.TexturePart, projectionMatrix [16]f
 		projectionMatrix, quads,
 		geometryMatrix, colorMatrix)
 }
+
+func (t *Texture) Dispose() {
+	C.glDeleteTextures(1, &t.native)
+}