mirror of https://github.com/buggins/dlangui.git
Example1 OpenGL drawable with Old API (glBegin...) - GLGears
This commit is contained in:
Vadim Lopatin
parent
07f8ec9127
commit
809794d15a
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@ -925,15 +925,54 @@ static if (ENABLE_OPENGL) {
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import derelict.opengl3.gl3;
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import derelict.opengl3.gl;
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class MyOpenglWidget : Widget {
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class MyOpenglWidget : VerticalLayout {
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this() {
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super("OpenGLView");
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layoutWidth = FILL_PARENT;
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layoutHeight = FILL_PARENT;
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alignment = Align.Center;
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backgroundDrawable = DrawableRef(new OpenGLDrawable(&doDraw));
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// add some UI on top of OpenGL drawable
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Widget w = parseML(q{
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VerticalLayout {
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margins: 40
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padding: 40
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alignment: center
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//backgroundColor: "#C0E0E070" // semitransparent yellow background
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// red bold text with size = 150% of base style size and font face Arial
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TextWidget { text: "Hello World example for DlangUI"; textColor: "red"; fontSize: 150%; fontWeight: 800; fontFace: "Arial" }
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// arrange controls as form - table with two columns
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TableLayout {
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colCount: 2
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TextWidget { text: "param 1" }
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EditLine { id: edit1; text: "some text" }
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TextWidget { text: "param 2" }
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EditLine { id: edit2; text: "some text for param2" }
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TextWidget { text: "some radio buttons" }
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// arrange some radio buttons vertically
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VerticalLayout {
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RadioButton { id: rb1; text: "Item 1" }
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RadioButton { id: rb2; text: "Item 2" }
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RadioButton { id: rb3; text: "Item 3" }
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}
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TextWidget { text: "and checkboxes" }
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// arrange some checkboxes horizontally
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HorizontalLayout {
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CheckBox { id: cb1; text: "checkbox 1" }
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CheckBox { id: cb2; text: "checkbox 2" }
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}
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}
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HorizontalLayout {
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Button { id: btnOk; text: "Ok" }
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Button { id: btnCancel; text: "Cancel" }
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}
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}
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});
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addChild(w);
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}
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bool _initCalled;
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bool _oldApi;
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private void doDraw(DrawBuf buf, Rect rc) {
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Log.v("GlGears: MyOpenglWidget.doDraw() draw gears");
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@ -941,25 +980,49 @@ static if (ENABLE_OPENGL) {
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Log.v("GlGears: OpenGL is disabled");
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return;
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}
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if (!glLightfv) {
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Log.v("GlGears: GL context doesn't support old OpenGL API");
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// TODO: use some new api code?
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return;
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}
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_oldApi = !!glLightfv;
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if (_oldApi) {
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drawUsingOldAPI(rc);
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} else {
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drawUsingNewAPI(rc);
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}
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}
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void drawUsingOldAPI(Rect rc) {
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static bool _initCalled;
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if (!_initCalled) {
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Log.d("GlGears: calling init()");
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_initCalled = true;
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init();
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glxgears_init();
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}
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Log.v("GlGears: calling reshape()");
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reshape(rc.width, rc.height);
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glxgears_reshape(rc);
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Log.v("GlGears: calling draw()");
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draw();
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glEnable(GL_LIGHTING);
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glEnable(GL_LIGHT0);
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glEnable(GL_DEPTH_TEST);
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glxgears_draw();
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glDisable(GL_LIGHTING);
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glDisable(GL_LIGHT0);
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glDisable(GL_DEPTH_TEST);
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}
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void drawUsingNewAPI(Rect rc) {
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}
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/// returns true is widget is being animated - need to call animate() and redraw
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@property override bool animating() { return true; }
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/// animates window; interval is time left from previous draw, in hnsecs (1/10000000 of second)
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override void animate(long interval) {
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if (_oldApi) {
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// rotate gears
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angle += interval * 0.000005f;
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} else {
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}
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invalidate();
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}
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}
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// Sample project for old API: GlxGears
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import std.math;
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static __gshared GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
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@ -1106,9 +1169,9 @@ static if (ENABLE_OPENGL) {
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}
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static void draw()
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static void glxgears_draw()
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{
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glClear(/*GL_COLOR_BUFFER_BIT | */GL_DEPTH_BUFFER_BIT);
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glPushMatrix();
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glRotatef(view_rotx, 1.0, 0.0, 0.0);
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@ -1139,11 +1202,12 @@ static if (ENABLE_OPENGL) {
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/* new window size or exposure */
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static void
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reshape(int width, int height)
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glxgears_reshape(Rect rc)
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{
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GLfloat h = cast(GLfloat) height / cast(GLfloat) width;
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GLfloat h = cast(GLfloat) rc.height / cast(GLfloat) rc.width;
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glViewport(0, 0, cast(GLint) width, cast(GLint) height);
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glViewport(rc.top, rc.left, cast(GLint)rc.width, cast(GLint)rc.height);
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//glViewport(0, 0, cast(GLint) width, cast(GLint) height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
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@ -1153,7 +1217,7 @@ static if (ENABLE_OPENGL) {
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}
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static void init()
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static void glxgears_init()
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{
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static GLfloat[4] pos = [ 5.0, 5.0, 10.0, 0.0 ];
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static GLfloat[4] red = [ 0.8, 0.1, 0.0, 1.0 ];
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