orca/examples/canvas/main.c

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/************************************************************//**
*
* @file: main.cpp
* @author: Martin Fouilleul
* @date: 30/07/2022
* @revision:
*
*****************************************************************/
#include<stdlib.h>
#include<string.h>
#include<errno.h>
#define _USE_MATH_DEFINES //NOTE: necessary for MSVC
#include<math.h>
#include"milepost.h"
#define LOG_SUBSYSTEM "Main"
mg_font create_font()
{
//NOTE(martin): create font
str8 fontPath = mp_app_get_resource_path(mem_scratch(), "../resources/OpenSansLatinSubset.ttf");
char* fontPathCString = str8_to_cstring(mem_scratch(), fontPath);
FILE* fontFile = fopen(fontPathCString, "r");
if(!fontFile)
{
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log_error("Could not load font file '%s': %s\n", fontPathCString, strerror(errno));
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return(mg_font_nil());
}
unsigned char* fontData = 0;
fseek(fontFile, 0, SEEK_END);
u32 fontDataSize = ftell(fontFile);
rewind(fontFile);
fontData = (unsigned char*)malloc(fontDataSize);
fread(fontData, 1, fontDataSize, fontFile);
fclose(fontFile);
unicode_range ranges[5] = {UNICODE_RANGE_BASIC_LATIN,
UNICODE_RANGE_C1_CONTROLS_AND_LATIN_1_SUPPLEMENT,
UNICODE_RANGE_LATIN_EXTENDED_A,
UNICODE_RANGE_LATIN_EXTENDED_B,
UNICODE_RANGE_SPECIALS};
mg_font font = mg_font_create_from_memory(fontDataSize, fontData, 5, ranges);
free(fontData);
return(font);
}
int main()
{
LogLevel(LOG_LEVEL_WARNING);
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 surface = mg_surface_create_for_window(window, MG_BACKEND_DEFAULT);
mg_surface_swap_interval(surface, 0);
//TODO: create canvas
mg_canvas canvas = mg_canvas_create(surface);
if(mg_canvas_is_nil(canvas))
{
printf("Error: couldn't create canvas\n");
return(-1);
}
mg_font font = create_font();
// start app
mp_window_bring_to_front(window);
mp_window_focus(window);
f32 x = 400, y = 300;
f32 speed = 0;
f32 dx = speed, dy = speed;
f64 frameTime = 0;
while(!mp_should_quit())
{
f64 startTime = mp_get_time(MP_CLOCK_MONOTONIC);
mp_pump_events(0);
mp_event event = {0};
while(mp_next_event(&event))
{
switch(event.type)
{
case MP_EVENT_WINDOW_CLOSE:
{
mp_request_quit();
} break;
case MP_EVENT_KEYBOARD_KEY:
{
if(event.key.action == MP_KEY_PRESS || event.key.action == MP_KEY_REPEAT)
{
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f32 factor = (event.key.mods & MP_KEYMOD_SHIFT) ? 10 : 1;
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if(event.key.code == MP_KEY_LEFT)
{
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x-=0.3*factor;
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}
else if(event.key.code == MP_KEY_RIGHT)
{
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x+=0.3*factor;
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}
else if(event.key.code == MP_KEY_UP)
{
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y-=0.3*factor;
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}
else if(event.key.code == MP_KEY_DOWN)
{
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y+=0.3*factor;
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}
}
} break;
default:
break;
}
}
if(x-200 < 0)
{
x = 200;
dx = speed;
}
if(x+200 > contentRect.w)
{
x = contentRect.w - 200;
dx = -speed;
}
if(y-200 < 0)
{
y = 200;
dy = speed;
}
if(y+200 > contentRect.h)
{
y = contentRect.h - 200;
dy = -speed;
}
x += dx;
y += dy;
mg_surface_prepare(surface);
// background
mg_set_color_rgba(0, 1, 1, 1);
mg_clear();
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mg_set_color_rgba(1, 0, 0, 1);
mg_set_width(2);
mg_rectangle_stroke(304, 100, 300, 250);
mg_clip_push(304, 100, 300, 250);
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// head
mg_set_color_rgba(1, 1, 0, 1);
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mg_circle_fill(x, y, 200);
// smile
f32 frown = frameTime > 0.033 ? -100 : 0;
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mg_set_color_rgba(0, 0, 0, 1);
mg_set_width(20);
mg_move_to(x-100, y+100);
mg_cubic_to(x-50, y+150+frown, x+50, y+150+frown, x+100, y+100);
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mg_stroke();
// eyes
mg_ellipse_fill(x-70, y-50, 30, 50);
mg_ellipse_fill(x+70, y-50, 30, 50);
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mg_clip_pop();
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// text
mg_set_color_rgba(0, 0, 1, 1);
mg_set_font(font);
mg_set_font_size(12);
mg_move_to(50, 600-50);
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str8 text = str8_pushf(mem_scratch(),
"Milepost vector graphics test program (frame time = %fs, fps = %f)...",
frameTime,
1./frameTime);
mg_text_outlines(text);
mg_fill();
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printf("Milepost vector graphics test program (frame time = %fs, fps = %f)...\n",
frameTime,
1./frameTime);
mg_flush();
mg_surface_present(surface);
mem_arena_clear(mem_scratch());
frameTime = mp_get_time(MP_CLOCK_MONOTONIC) - startTime;
}
mg_font_destroy(font);
mg_canvas_destroy(canvas);
mg_surface_destroy(surface);
mp_window_destroy(window);
mp_terminate();
return(0);
}