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gui.c
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gui.c
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#include "gui.h"
#include "common.h"
#include <GL/glew.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_opengl.h>
#define NK_INCLUDE_FIXED_TYPES
#define NK_INCLUDE_STANDARD_IO
#define NK_INCLUDE_STANDARD_VARARGS
#define NK_INCLUDE_DEFAULT_ALLOCATOR
#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
#define NK_INCLUDE_FONT_BAKING
#define NK_INCLUDE_DEFAULT_FONT
#define NK_IMPLEMENTATION
#define NK_SDL_GL3_IMPLEMENTATION
#include "nuklear/nuklear.h"
#include "nuklear/demo/sdl_opengl3/nuklear_sdl_gl3.h"
#undef SCREEN_ONLY_SDL
#include "screen.h"
#define WINDOW_WIDTH 720
#define WINDOW_HEIGHT 640
#define MAX_VERTEX_MEMORY 512 * 1024
#define MAX_ELEMENT_MEMORY 128 * 1024
typedef struct
{
cpu_t *cpu;
mqd_t mq;
} gui_arg_t;
static void cmd(mqd_t mq, char *msg)
{
mq_send(mq, msg, strlen(msg) + 1, 2);
}
#define cmdf(mq, buffer, pattern, args...) \
{ \
sprintf(buffer, pattern, ##args); \
cmd(mq, buffer); \
}
void gui(gui_arg_t *arg)
{
cpu_t *cpu = arg->cpu;
mqd_t mq = arg->mq;
free(arg);
SDL_Window *win;
SDL_GLContext glContext;
int win_width, win_height;
bool running = true;
bool cpu_running = false;
struct nk_context *ctx;
struct nk_colorf bg =
{
.r = 0.29f,
.g = 0.28f,
.b = 0.50f,
.a = 1.0f,
};
struct nk_color
selected = nk_rgb(28, 234, 79),
red = nk_rgb(226, 56, 76);
uint16_t disas_start = 0x600,
disas_end = 0x600 + 32;
uint8_t screen_scale = 4;
SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, "0");
SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER|SDL_INIT_EVENTS);
SDL_GL_SetAttribute (SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG);
SDL_GL_SetAttribute (SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
win = SDL_CreateWindow("6502",
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_OPENGL|SDL_WINDOW_SHOWN|SDL_WINDOW_ALLOW_HIGHDPI|SDL_WINDOW_RESIZABLE);
glContext = SDL_GL_CreateContext(win);
SDL_GetWindowSize(win, &win_width, &win_height);
/* OpenGL setup */
glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT);
glewExperimental = 1;
if (glewInit() != GLEW_OK) {
THROW("Failed to setup GLEW\n");
}
ctx = nk_sdl_init(win);
struct nk_font_atlas *atlas;
nk_sdl_font_stash_begin(&atlas);
struct nk_font *font = nk_font_atlas_add_default(atlas, 16, NULL);
nk_sdl_font_stash_end();
//nk_style_load_all_cursors(ctx, atlas->cursors);
nk_style_set_font(ctx, &font->handle);
while (running)
{
SDL_Event evt;
nk_input_begin(ctx);
while (SDL_PollEvent(&evt))
{
if (evt.type == SDL_QUIT)
goto cleanup;
nk_sdl_handle_event(&evt);
}
nk_input_end(ctx);
if (!cpu->running)
cpu_running = false;
if (nk_begin(ctx, "Registers", nk_rect(50, 300, 500, 90),
NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
{
nk_layout_row_dynamic(ctx, 30, 4);
uint16_t pc = nk_propertyi(ctx, "PC", 0, cpu->pc, 0xFFFF, 1, 20.0f);
uint8_t rega = nk_propertyi(ctx, "A", 0, cpu->regs[A], 0xFF, 1, 20.0f),
regx = nk_propertyi(ctx, "X", 0, cpu->regs[X], 0xFF, 1, 20.0f),
regy = nk_propertyi(ctx, "Y", 0, cpu->regs[Y], 0xFF, 1, 20.0f);
char buffer[64];
if (pc != cpu->pc)
cmdf(mq, buffer, "set PC #$%x", pc);
if (rega != cpu->regs[A])
cmdf(mq, buffer, "set A #$%x", rega);
if (regx != cpu->regs[X])
cmdf(mq, buffer, "set X #$%x", regx);
if (regy != cpu->regs[Y])
cmdf(mq, buffer, "set Y #$%x", regy);
}
nk_end(ctx);
if (nk_begin(ctx, "Screen", nk_rect(50, 400, 150, 220),
NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
{
nk_layout_row_dynamic(ctx, 24, 1);
screen_scale = nk_propertyi(ctx, "Scale", 1, screen_scale, 16, 1, 1);
nk_layout_row_static(ctx, screen_scale * 32, screen_scale * 32, 1);
screen(ctx, cpu->mem + CPU_FB_ADDR, screen_scale);
}
nk_end(ctx);
if (nk_begin(ctx, "Disassembler", nk_rect(330, 50, 300, 200),
NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
{
nk_layout_row_dynamic(ctx, 30, 2);
disas_start = nk_propertyi(ctx, "Start", 0, disas_start, 0xFFFF, 1, 20.0f);
disas_end = nk_propertyi(ctx, "End", 0, disas_end, 0xFFFF, 1, 20.0f);
for (uint16_t pc = disas_start; pc < disas_end;)
{
nk_layout_row_begin(ctx, NK_STATIC, 24, 2);
uint16_t cpu_pc = cpu->pc,
this_pc = pc;
char addr[6];
sprintf(addr, "$%x", pc);
nk_layout_row_push(ctx, 48);
nk_label(ctx, addr, NK_TEXT_LEFT);
nk_layout_row_push(ctx, 120);
char *line = disas_step(cpu, &pc);
if (cpu_pc == this_pc)
{
nk_label_colored(ctx, line, NK_TEXT_LEFT, selected);
}
else
{
nk_label(ctx, line, NK_TEXT_LEFT);
}
free(line);
}
}
nk_end(ctx);
if (nk_begin(ctx, "Stack", nk_rect(250, 250, 230, 350),
NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
{
nk_layout_row_static(ctx, 24, 48, 2);
for (int i = 0xFF; i >= 0; i--)
{
char line[6];
sprintf(line, "$%x", 0x100 + i);
nk_label(ctx, line, NK_TEXT_LEFT);
sprintf(line, "$%x", cpu->mem[0x100 + i]);
if (i == cpu->regs[SP])
{
nk_label_colored(ctx, line, NK_TEXT_LEFT, selected);
}
else
{
nk_label(ctx, line, NK_TEXT_LEFT);
}
}
}
nk_end(ctx);
if (nk_begin(ctx, "Debugger", nk_rect(50, 50, 230, 150),
NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
{
nk_layout_row_dynamic(ctx, 30, 2);
nk_label(ctx, cpu->running ? "CPU Running" : "CPU Halted", NK_TEXT_LEFT);
if (nk_button_label(ctx, "Reset"))
{
puts("cpu reset");
cmd(mq, "reset");
}
nk_layout_row_dynamic(ctx, 30, 2);
if (nk_button_label(ctx, "Step"))
{
printf("step pressed!\n");
cmd(mq, "step");
}
if (nk_button_label(ctx, cpu_running ? "Stop" : "Run"))
{
cmd(mq, cpu_running ? "pause" : "run");
cpu_running = !cpu_running;
puts(cpu_running ? "cpu running" : "cpu stopped");
}
}
nk_end(ctx);
SDL_GetWindowSize(win, &win_width, &win_height);
glViewport(0, 0, win_width, win_height);
glClear(GL_COLOR_BUFFER_BIT);
glClearColor(bg.r, bg.g, bg.b, bg.a);
nk_sdl_render(NK_ANTI_ALIASING_ON, MAX_VERTEX_MEMORY, MAX_ELEMENT_MEMORY);
SDL_GL_SwapWindow(win);
}
cleanup:
nk_sdl_shutdown();
SDL_GL_DeleteContext(glContext);
SDL_DestroyWindow(win);
SDL_Quit();
cmd(mq, "quit");
printf("Cleaned up GUI\n");
}
void start_gui(mqd_t mq, cpu_t *cpu)
{
pthread_t gui_thread;
gui_arg_t *arg = malloc(sizeof(gui_arg_t));
arg->cpu = cpu;
arg->mq = mq;
pthread_create(&gui_thread, NULL, (void *(*)(void *))&gui, arg);
}