orca/milepost/examples/tiger/main.c

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C
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/************************************************************//**
*
* @file: main.cpp
* @author: Martin Fouilleul
* @date: 30/07/2022
* @revision:
*
*****************************************************************/
#include<stdlib.h>
#include<string.h>
#include<stdio.h>
#include<errno.h>
#define _USE_MATH_DEFINES //NOTE: necessary for MSVC
#include<math.h>
#include"milepost.h"
#include"tiger.c"
mg_font create_font()
{
//NOTE(martin): create font
str8 fontPath = path_executable_relative(mem_scratch(), STR8("../resources/OpenSansLatinSubset.ttf"));
char* fontPathCString = str8_to_cstring(mem_scratch(), fontPath);
FILE* fontFile = fopen(fontPathCString, "r");
if(!fontFile)
{
log_error("Could not load font file '%s': %s\n", fontPathCString, strerror(errno));
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()
{
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_CANVAS);
if(mg_surface_is_nil(surface))
{
log_error("Couln't create surface\n");
return(-1);
}
mg_surface_swap_interval(surface, 0);
//TODO: create canvas
mg_canvas canvas = mg_canvas_create();
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);
bool tracked = false;
vec2 trackPoint = {0};
f32 zoom = 1;
f32 startX = 300, startY = 200;
bool singlePath = false;
int singlePathIndex = 0;
f64 frameTime = 0;
mp_input_state inputState = {0};
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)
{
mp_input_process_event(&inputState, event);
switch(event->type)
{
case MP_EVENT_WINDOW_CLOSE:
{
mp_request_quit();
} break;
case MP_EVENT_MOUSE_BUTTON:
{
if(event->key.code == MP_MOUSE_LEFT)
{
if(event->key.action == MP_KEY_PRESS)
{
tracked = true;
vec2 mousePos = mp_mouse_position(&inputState);
trackPoint.x = (mousePos.x - startX)/zoom;
trackPoint.y = (mousePos.y - startY)/zoom;
}
else
{
tracked = false;
}
}
} break;
case MP_EVENT_MOUSE_WHEEL:
{
vec2 mousePos = mp_mouse_position(&inputState);
f32 pinX = (mousePos.x - startX)/zoom;
f32 pinY = (mousePos.y - startY)/zoom;
zoom *= 1 + event->mouse.deltaY * 0.01;
zoom = Clamp(zoom, 0.5, 5);
startX = mousePos.x - pinX*zoom;
startY = mousePos.y - pinY*zoom;
} break;
case MP_EVENT_KEYBOARD_KEY:
{
if(event->key.action == MP_KEY_PRESS || event->key.action == MP_KEY_REPEAT)
{
switch(event->key.code)
{
case MP_KEY_SPACE:
singlePath = !singlePath;
break;
case MP_KEY_UP:
{
if(event->key.mods & MP_KEYMOD_SHIFT)
{
singlePathIndex++;
}
else
{
zoom += 0.001;
}
} break;
case MP_KEY_DOWN:
{
if(event->key.mods & MP_KEYMOD_SHIFT)
{
singlePathIndex--;
}
else
{
zoom -= 0.001;
}
} break;
}
}
} break;
default:
break;
}
}
if(tracked)
{
vec2 mousePos = mp_mouse_position(&inputState);
startX = mousePos.x - trackPoint.x*zoom;
startY = mousePos.y - trackPoint.y*zoom;
}
mg_surface_prepare(surface);
mg_set_color_rgba(1, 0, 1, 1);
mg_clear();
mg_matrix_push((mg_mat2x3){zoom, 0, startX,
0, zoom, startY});
draw_tiger(singlePath, singlePathIndex);
if(singlePath)
{
printf("display single path %i\n", singlePathIndex);
printf("viewpos = (%f, %f), zoom = %f\n", startX, startY, zoom);
}
mg_matrix_pop();
// text
mg_set_color_rgba(0, 0, 1, 1);
mg_set_font(font);
mg_set_font_size(12);
mg_move_to(50, 600-50);
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();
printf("Milepost vector graphics test program (frame time = %fs, fps = %f)...\n",
frameTime,
1./frameTime);
mg_render(surface, canvas);
mg_surface_present(surface);
mp_input_next_frame(&inputState);
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);
}