add multi surface skeleton example

examples/multi_surface/build.bat

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+
+set INCLUDES=/I ..\..\src /I ..\..\src\util /I ..\..\src\platform /I ../../ext /I ../../ext/angle_headers
+
+cl /we4013 /Zi /Zc:preprocessor /std:c11 %INCLUDES% main.c /link /LIBPATH:../../bin milepost.dll.lib /out:../../bin/example_multi_surface.exe

examples/multi_surface/build.sh

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+#!/bin/bash
+
+BINDIR=../../bin
+RESDIR=../../resources
+SRCDIR=../../src
+EXTDIR=../../ext
+
+INCLUDES="-I$SRCDIR -I$SRCDIR/util -I$SRCDIR/platform -I$SRCDIR/app -I$EXTDIR"
+LIBS="-L$BINDIR -lmilepost"
+FLAGS="-mmacos-version-min=10.15.4 -DDEBUG -DLOG_COMPILE_DEBUG"
+
+clang -g $FLAGS $LIBS $INCLUDES -o $BINDIR/example_multi_surface main.c
+
+install_name_tool -add_rpath "@executable_path" $BINDIR/example_multi_surface

examples/multi_surface/main.c

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+
+#include<stdlib.h>
+#include<stdio.h>
+
+#define MG_INCLUDE_GL_API 1
+#include"milepost.h"
+
+int main()
+{
+	mp_init();
+	mp_clock_init(); //TODO put that in mp_init()?
+
+	mp_rect windowRect = {.x = 100, .y = 100, .w = 810, .h = 610};
+	mp_window window = mp_window_create(windowRect, "test", 0);
+
+	mp_rect contentRect = mp_window_get_content_rect(window);
+
+	//NOTE: create surface
+	mg_surface surface1 = mg_surface_create_for_window(window, MG_CANVAS);
+	if(mg_surface_is_nil(surface1))
+	{
+		printf("Error: couldn't create surface 1\n");
+		return(-1);
+	}
+	mg_surface_swap_interval(surface1, 0);
+
+	mg_surface surface2 = mg_surface_create_for_window(window, MG_CANVAS);
+	if(mg_surface_is_nil(surface2))
+	{
+		printf("Error: couldn't create surface 2\n");
+		return(-1);
+	}
+	mg_surface_swap_interval(surface2, 0);
+
+	mg_canvas canvas1 = mg_canvas_create();
+	if(mg_canvas_is_nil(canvas1))
+	{
+		printf("Error: couldn't create canvas 1\n");
+		return(-1);
+	}
+
+	mg_canvas canvas2 = mg_canvas_create();
+	if(mg_canvas_is_nil(canvas2))
+	{
+		printf("Error: couldn't create canvas 2\n");
+		return(-1);
+	}
+
+	// start app
+	mp_window_bring_to_front(window);
+	mp_window_focus(window);
+
+	while(!mp_should_quit())
+	{
+		f64 startTime = mp_get_time(MP_CLOCK_MONOTONIC);
+
+		mp_pump_events(0);
+		mp_event* event = 0;
+		while((event = mp_next_event(mem_scratch())) != 0)
+		{
+			switch(event->type)
+			{
+				case MP_EVENT_WINDOW_CLOSE:
+				{
+					mp_request_quit();
+				} break;
+
+				default:
+					break;
+			}
+		}
+
+		mg_surface_prepare(surface1);
+		mg_canvas_set_current(canvas1);
+
+			mg_set_color_rgba(1, 0, 0, 1);
+			mg_rectangle_fill(100, 100, 300, 150);
+
+		mg_render(surface1, canvas1);
+
+		mg_surface_prepare(surface2);
+		mg_canvas_set_current(canvas2);
+
+			mg_set_color_rgba(0, 0, 1, 1);
+			mg_rectangle_fill(300, 300, 300, 200);
+
+		mg_render(surface2, canvas2);
+
+
+		mg_surface_present(surface1);
+		mg_surface_present(surface2);
+
+		mem_arena_clear(mem_scratch());
+	}
+
+	mg_canvas_destroy(canvas1);
+	mg_surface_destroy(surface1);
+	mg_canvas_destroy(canvas2);
+	mg_surface_destroy(surface2);
+
+	mp_window_destroy(window);
+
+	mp_terminate();
+
+	return(0);
+}