Bug fix: Structs containing js.Object can't be compared (for now)

internal/graphics/internal/shader/program.go

@@ -67,7 +67,7 @@ func initialize(c *opengl.Context) error {
 var lastProgram opengl.Program
 
 func useProgramColorMatrix(c *opengl.Context, projectionMatrix []float32, geo Matrix, color Matrix) opengl.Program {
-	if lastProgram != programColorMatrix {
+	if !lastProgram.Equals(programColorMatrix) {
 		c.UseProgram(programColorMatrix)
 		lastProgram = programColorMatrix
 	}

internal/opengl/context.go

@@ -26,8 +26,14 @@ type Texture int
 type Framebuffer int
 type Shader int
 type Program int
-type UniformLocation int
-type AttribLocation int
+
+// TODO: Remove this after the GopherJS bug was fixed (#159)
+func (p Program) Equals(other Program) bool {
+	return p == other
+}
+
+type UniformLocation gl.UniformLocation
+type AttribLocation gl.AttribLocation
 
 type context struct{}
 

internal/opengl/context_js.go

@@ -39,6 +39,11 @@ type Program struct {
 	js.Object
 }
 
+// TODO: Remove this after the GopherJS bug was fixed (#159)
+func (p Program) Equals(other Program) bool {
+	return p.Object == other.Object
+}
+
 type UniformLocation struct {
 	js.Object
 }
@@ -141,7 +146,8 @@ var lastFramebuffer Framebuffer
 
 func (c *Context) SetViewport(f Framebuffer, width, height int) error {
 	gl := c.gl
-	if lastFramebuffer != f {
+	// TODO: Fix this after the GopherJS bug was fixed (#159)
+	if lastFramebuffer.Object != f.Object {
 		gl.Flush()
 		lastFramebuffer = f
 	}