oc_render uses currently selected surface

doc/QuickStart.md

@@ -65,7 +65,7 @@ oc_canvas_select(canvas); // make the canvas current
 //... add commands to the canvas command buffer using drawing functions
 
 oc_surface_select(surface);  // select the canvas surface
-oc_render(surface, canvas);  // render the canvas commands into it
+oc_render(canvas);           // render the canvas commands into it
 oc_surface_present(surface); // display the result
 ```
 

doc/cheatsheets/cheatsheet_graphics.h

@@ -16,8 +16,8 @@ oc_surface oc_surface_gles();
 void oc_surface_destroy(oc_surface surface);
 
 void oc_surface_select(oc_surface surface);
-void oc_surface_present(oc_surface surface);
 void oc_surface_deselect(void);
+void oc_surface_present(oc_surface surface);
 
 oc_vec2 oc_surface_get_size(oc_surface surface);
 oc_vec2 oc_surface_contents_scaling(oc_surface surface);
@@ -32,7 +32,7 @@ bool oc_canvas_is_nil(oc_canvas canvas);
 oc_canvas oc_canvas_create(void);
 void oc_canvas_destroy(oc_canvas canvas);
 oc_canvas oc_canvas_set_current(oc_canvas canvas);
-void oc_render(oc_surface surface, oc_canvas canvas);
+void oc_render(oc_canvas canvas);
 
 //------------------------------------------------------------------------------------------
 // transform and clipping

samples/breakout/src/main.c

@@ -465,7 +465,7 @@ ORCA_EXPORT void oc_on_frame_refresh(void)
     oc_matrix_pop();
 
     oc_surface_select(surface);
-    oc_render(surface, canvas);
+    oc_render(canvas);
     oc_surface_present(surface);
 
     oc_arena_clear(oc_scratch());

samples/clock/src/main.c

@@ -133,6 +133,6 @@ ORCA_EXPORT void oc_on_frame_refresh(void)
     oc_circle_fill(centerX, centerY, 10 * uiScale);
 
     oc_surface_select(surface);
-    oc_render(surface, canvas);
+    oc_render(canvas);
     oc_surface_present(surface);
 }

samples/ui/src/main.c

@@ -355,7 +355,7 @@ ORCA_EXPORT void oc_on_frame_refresh(void)
     oc_canvas_select(canvas);
     oc_surface_select(surface);
     oc_ui_draw();
-    oc_render(surface, canvas);
+    oc_render(canvas);
     oc_surface_present(surface);
 
     oc_arena_clear(oc_scratch());

sketches/atlas/main.c

@@ -87,7 +87,7 @@ int main()
         oc_image_draw_region(image1.image, image1.rect, (oc_rect){ 100, 100, 300, 300 });
         oc_image_draw_region(image2.image, image2.rect, (oc_rect){ 300, 200, 300, 300 });
 
-        oc_render(surface, canvas);
+        oc_render(canvas);
         oc_surface_present(surface);
 
         oc_arena_clear(oc_scratch());

sketches/canvas/main.c

@@ -180,7 +180,7 @@ int main()
                     frameTime,
                     1. / frameTime);
 
-        oc_render(surface, canvas);
+        oc_render(canvas);
         oc_surface_present(surface);
 
         oc_arena_clear(oc_scratch());

sketches/image/main.c

@@ -102,7 +102,7 @@ int main()
         oc_image_draw(image, (oc_rect){ 100, 100, 300, 300 });
         oc_image_draw(image2, (oc_rect){ 300, 200, 300, 300 });
 
-        oc_render(surface, canvas);
+        oc_render(canvas);
         oc_surface_present(surface);
 
         oc_arena_clear(oc_scratch());

sketches/multi_surface/main.c

@@ -95,7 +95,7 @@ int main()
         oc_set_color_rgba(1, 0, 0, 1);
         oc_rectangle_fill(100, 100, 300, 150);
 
-        oc_render(surface1, canvas1);
+        oc_render(canvas1);
 
         //*
         oc_surface_select(surface2);
@@ -107,7 +107,7 @@ int main()
         oc_set_color_rgba(0, 0, 1, 1);
         oc_rectangle_fill(200, 200, 300, 200);
 
-        oc_render(surface2, canvas2);
+        oc_render(canvas2);
         //*/
 
         oc_surface_present(surface1);

sketches/perf_text/main.c

@@ -298,7 +298,7 @@ int main()
         f64 startFlushTime = oc_clock_time(OC_CLOCK_MONOTONIC);
 
         oc_surface_select(surface);
-        oc_render(surface, canvas);
+        oc_render(canvas);
 
         f64 startPresentTime = oc_clock_time(OC_CLOCK_MONOTONIC);
         oc_surface_present(surface);

sketches/render_thread/main.c

@@ -36,7 +36,7 @@ i32 render_thread(void* user)
         oc_set_color_rgba(1, 0, 0, 1);
         oc_rectangle_fill(100, 100, 300, 150);
 
-        oc_render(surface, canvas);
+        oc_render(canvas);
 
         oc_surface_present(surface);
 

sketches/smiley/main.c

@@ -198,7 +198,7 @@ int main()
                     1. / frameTime);
 
         oc_surface_select(surface);
-        oc_render(surface, canvas);
+        oc_render(canvas);
         oc_surface_present(surface);
 
         oc_arena_clear(oc_scratch());

sketches/tiger/main.c

@@ -233,7 +233,7 @@ int main()
                     frameTime,
                     1. / frameTime);
 
-        oc_render(surface, canvas);
+        oc_render(canvas);
         oc_surface_present(surface);
 
         oc_input_next_frame(&inputState);

sketches/ui/main.c

@@ -632,7 +632,7 @@ int main()
 
         oc_ui_draw();
 
-        oc_render(surface, canvas);
+        oc_render(canvas);
         oc_surface_present(surface);
 
         oc_arena_clear(scratch);

src/graphics/graphics.h

@@ -116,8 +116,10 @@ ORCA_API oc_surface oc_surface_gles();   //DOC: create a surface for use with GL
 ORCA_API void oc_surface_destroy(oc_surface surface); //DOC: destroys the surface
 
 ORCA_API void oc_surface_select(oc_surface surface); //DOC: selects the surface in the current thread before drawing
-ORCA_API void oc_surface_present(oc_surface surface); //DOC: presents the surface to its window
 ORCA_API void oc_surface_deselect(void);             //DOC: deselects the current thread's previously selected surface
+ORCA_API oc_surface oc_surface_get_selected();
+
+ORCA_API void oc_surface_present(oc_surface surface); //DOC: presents the surface to its window
 
 ORCA_API oc_vec2 oc_surface_get_size(oc_surface surface);
 ORCA_API oc_vec2 oc_surface_contents_scaling(oc_surface surface); //DOC: returns the scaling of the surface (pixels = points * scale)
@@ -214,7 +216,7 @@ ORCA_API bool oc_canvas_is_nil(oc_canvas canvas); //DOC: true if canvas is nil
 ORCA_API oc_canvas oc_canvas_create(void);             //DOC: create a new canvas
 ORCA_API void oc_canvas_destroy(oc_canvas canvas);     //DOC: destroys canvas
 ORCA_API oc_canvas oc_canvas_select(oc_canvas canvas); //DOC: selects canvas in the current thread
-ORCA_API void oc_render(oc_surface surface, oc_canvas canvas); //DOC: renders all canvas commands onto surface
+ORCA_API void oc_render(oc_canvas canvas);             //DOC: renders all canvas commands onto surface
 
 //------------------------------------------------------------------------------------------
 //SECTION: fonts

src/graphics/graphics_common.c

@@ -219,6 +219,14 @@ void* oc_graphics_data_from_handle(oc_graphics_handle_kind kind, u64 h)
     return (data);
 }
 
+//------------------------------------------------------------------------------------------
+//NOTE(martin): surface nil and is nil
+//------------------------------------------------------------------------------------------
+
+oc_surface oc_surface_nil() { return ((oc_surface){ .h = 0 }); }
+
+bool oc_surface_is_nil(oc_surface surface) { return (surface.h == 0); }
+
 //------------------------------------------------------------------------------------------
 //NOTE(martin): graphics canvas internal
 //------------------------------------------------------------------------------------------
@@ -926,13 +934,14 @@ oc_canvas oc_canvas_select(oc_canvas canvas)
     return (old);
 }
 
-void oc_render(oc_surface surface, oc_canvas canvas)
+void oc_render(oc_canvas canvas)
 {
+    oc_surface selectedSurface = oc_surface_get_selected();
     oc_canvas_data* canvasData = oc_canvas_data_from_handle(canvas);
-    if(canvasData)
+    if(canvasData && !oc_surface_is_nil(selectedSurface))
     {
         int eltCount = canvasData->path.startIndex + canvasData->path.count;
-        oc_surface_render_commands(surface,
+        oc_surface_render_commands(selectedSurface,
                                    canvasData->clearColor,
                                    canvasData->primitiveCount,
                                    canvasData->primitives,

src/graphics/graphics_surface.c

@@ -14,6 +14,11 @@
 
 oc_thread_local oc_surface oc_selectedSurface = { 0 };
 
+oc_surface oc_surface_get_selected()
+{
+    return (oc_selectedSurface);
+}
+
 //---------------------------------------------------------------
 // typed handles functions
 //---------------------------------------------------------------
@@ -98,10 +103,6 @@ bool oc_is_surface_backend_available(oc_surface_api api)
     return (result);
 }
 
-oc_surface oc_surface_nil() { return ((oc_surface){ .h = 0 }); }
-
-bool oc_surface_is_nil(oc_surface surface) { return (surface.h == 0); }
-
 oc_surface oc_surface_create_for_window(oc_window window, oc_surface_api api)
 {
     if(oc_graphicsData.init)

src/runtime.c

@@ -836,7 +836,7 @@ i32 orca_runloop(void* user)
             oc_clear();
         }
 
-        oc_render(app->debugOverlay.surface, app->debugOverlay.canvas);
+        oc_render(app->debugOverlay.canvas);
         oc_surface_present(app->debugOverlay.surface);
 
         oc_arena_clear(oc_scratch());
@@ -893,17 +893,6 @@ int main(int argc, char** argv)
 
     oc_surface_deselect();
 
-    //WARN: this is a workaround to avoid stalling the first few times we acquire drawables from
-    //      the surfaces... This should probably be fixed in the implementation of mtl_surface!
-
-    for(int i = 0; i < 3; i++)
-    {
-        oc_surface_select(app->debugOverlay.surface);
-        oc_canvas_select(app->debugOverlay.canvas);
-        oc_render(app->debugOverlay.surface, app->debugOverlay.canvas);
-        oc_surface_present(app->debugOverlay.surface);
-    }
-
     oc_ui_init(&app->debugOverlay.ui);
 
     //NOTE: show window and start runloop

src/wasmbind/surface_api.json

@@ -77,6 +77,18 @@
 		{"name": "surface",
 		 "type": {"name": "oc_surface", "tag": "S"}}]
 },
+{
+	"name": "oc_surface_deselect",
+	"cname": "oc_surface_deselect",
+	"ret": {"name": "void", "tag": "v"},
+	"args": []
+},
+{
+	"name": "oc_surface_get_selected",
+	"cname": "oc_surface_get_selected",
+	"ret": {"name": "oc_surface", "tag": "S"},
+	"args": []
+},
 {
 	"name": "oc_surface_present",
 	"cname": "oc_surface_present",