test render loop

project.config

@@ -58,7 +58,7 @@ case "$TASK" in
         # -fdata-sections -ffunction-sections -Wl,--gc-sections  removes unused code
         C_ARGS="-O2 -flto=auto -fuse-linker-plugin -fprofile-use -fprofile-prefix-path=$(realpath $OBJDIR)/objects -fdata-sections -ffunction-sections -Wl,--gc-sections"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=
         TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         POST_TASK_SCRIPT=
@@ -67,7 +67,7 @@ case "$TASK" in
     build_exec_dbg)
         C_ARGS="-O0 -g3"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=
         TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         POST_TASK_SCRIPT=
@@ -76,7 +76,7 @@ case "$TASK" in
     build_shared_lib)
         C_ARGS="-O2 -fpic -flto -shared"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS -Wl,-soname,$SHARED_LIB_FILE"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS -Wl,-soname,$SHARED_LIB_FILE"
         PRE_TASK_SCRIPT=
         TASK_SCRIPT=cbuild/default_tasks/build_shared_lib.sh
         POST_TASK_SCRIPT=
@@ -85,7 +85,7 @@ case "$TASK" in
     build_shared_lib_dbg)
         C_ARGS="-O0 -g3 -fpic -shared"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS -Wl,-soname,$SHARED_LIB_FILE"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS -Wl,-soname,$SHARED_LIB_FILE"
         PRE_TASK_SCRIPT=
         TASK_SCRIPT=cbuild/default_tasks/build_shared_lib.sh
         POST_TASK_SCRIPT=
@@ -126,7 +126,7 @@ case "$TASK" in
         # -fprofile-prefix-path sets path where profiling info about objects will be saved
         C_ARGS="-O2 -flto=auto -fuse-linker-plugin -fprofile-generate -fprofile-prefix-path=$(realpath $OBJDIR)/objects"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         TASK_SCRIPT=cbuild/default_tasks/profile.sh
         POST_TASK_SCRIPT=
@@ -139,7 +139,7 @@ case "$TASK" in
         # -pg adds code to executable, that generates file containing function call info (gmon.out)
         C_ARGS="-O2 -flto=auto -fuse-linker-plugin -pg"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         TASK_SCRIPT=cbuild/default_tasks/gprof.sh
         POST_TASK_SCRIPT=
@@ -153,7 +153,7 @@ case "$TASK" in
         # -pg adds code to executable, that generates file containing function call info (gmon.out)
         C_ARGS="-O2 -flto=auto -fuse-linker-plugin"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         TASK_SCRIPT=cbuild/default_tasks/callgrind.sh
         POST_TASK_SCRIPT=
@@ -163,7 +163,7 @@ case "$TASK" in
         OUTDIR="$OUTDIR/sanitize"
         C_ARGS="-O0 -g3 -fsanitize=undefined,address"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         TASK_SCRIPT=cbuild/default_tasks/exec.sh
         POST_TASK_SCRIPT=

src/VM/Display/Display.c

@@ -0,0 +1,90 @@
+#include <SDL3/SDL.h>
+#include <SDL3_image/SDL_image.h>
+#include "Display.h"
+
+typedef struct Display {
+    str name;
+    i32 width;
+    i32 height;
+    SDL_Window* window;
+    SDL_Renderer* renderer;
+} Display;
+
+static SDL_InitState sdl_init_state = {0};
+
+
+Display* Display_create(str name, i32 w, i32 h, DisplayFlags flags){
+    Display* d = malloc(sizeof(Display));
+
+    d->name = str_copy(name);
+    d->width = w;
+    d->height = h;
+    d->window = NULL;
+    d->renderer = NULL;
+
+    if (SDL_ShouldInit(&sdl_init_state)) {
+        bool sdl_initialized = SDL_Init(SDL_INIT_VIDEO);
+        SDL_SetInitialized(&sdl_init_state, sdl_initialized);
+        if(!sdl_initialized)
+            return false;
+    }
+
+    SDL_WindowFlags window_flags = SDL_WINDOW_ALWAYS_ON_TOP;
+    if(!SDL_CreateWindowAndRenderer(d->name.data, d->width, d->height, window_flags, &d->window, &d->renderer)){
+        return false;
+    }
+
+    return d;
+}
+
+void Display_destroy(Display* d){
+    free(d->name.data);
+    SDL_DestroyRenderer(d->renderer);
+    SDL_DestroyWindow(d->window);
+    free(d);
+
+    // if (SDL_ShouldQuit(&sdl_init_state)) {
+    //     SDL_Quit();
+    //     SDL_SetInitialized(&sdl_init_state, false);
+    // }
+}
+
+bool Display_setName(Display* d, str name){
+    d->name = str_copy(name);
+    return SDL_SetWindowTitle(d->window, name.data);
+}
+
+bool Display_setSize(Display* d, u32 w, u32 h){
+    d->width = w;
+    d->height = h;
+    return SDL_SetWindowSize(d->window, w, h);
+}
+
+bool Display_setDrawingColor(Display* d, ColorRGBA color){
+    return SDL_SetRenderDrawColor(d->renderer, color.r, color.g, color.b, color.a);
+}
+
+bool Display_clear(Display* d){
+    return SDL_RenderClear(d->renderer);
+}
+
+#define Rect_copy(DST, SRC) {\
+    DST.x = SRC.x;\
+    DST.y = SRC.y;\
+    DST.w = SRC.w;\
+    DST.h = SRC.h;\
+}
+
+bool Display_fillRect(Display* d, Rect rect) {
+    SDL_FRect sdl_rect;
+    Rect_copy(sdl_rect, rect);
+    return SDL_RenderFillRect(d->renderer, &sdl_rect);
+}
+
+bool Display_swapBuffers(Display* d){
+    return SDL_RenderPresent(d->renderer);
+}
+
+NULLABLE(cstr) Display_getError(){
+    return SDL_GetError();
+}

src/VM/Display/Display.h

@@ -0,0 +1,32 @@
+#pragma once
+#include "../../std.h"
+#include "../../string/str.h"
+
+typedef struct Rect {
+    i32 x, y;
+    i32 w, h;
+} Rect;
+#define Rect_create(X, Y, W, H) ((Rect){ .x = X, .y = Y, .w = W, .h = H})
+
+typedef struct ColorRGBA {
+    u8 r, g, b, a;
+} ColorRGBA;
+#define ColorRGBA_create(R, G, B, A) ((ColorRGBA){ .r = R, .g = G, .b = B, .a = A })
+
+
+typedef enum DisplayFlags {
+    DisplayFlags_Default = 0
+} DisplayFlags;
+
+typedef struct Display Display;
+
+Display* Display_create(str name, i32 w, i32 h, DisplayFlags flags);
+void Display_destroy(Display* d);
+
+bool Display_setName(Display* d, str name);
+bool Display_setSize(Display* d, u32 w, u32 h);
+bool Display_setDrawingColor(Display* d, ColorRGBA color);
+bool Display_clear(Display* d);
+bool Display_fillRect(Display* d, Rect rect);
+bool Display_swapBuffers(Display* d);
+NULLABLE(cstr) Display_getError();

src/VM/time.c

@@ -0,0 +1,18 @@
+#include <SDL3/SDL_timer.h>
+#include "time.h"
+
+void time_sleepMS(u32 ms){
+    SDL_Delay(ms);
+}
+
+void time_sleepNS(u64 ns){
+    SDL_DelayNS(ns);
+}
+
+u64 time_getMonotonicMS(){
+    SDL_GetTicks();
+}
+
+u64 time_getMonotonicNS(){
+    SDL_GetTicksNS();
+}

src/VM/time.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include "../std.h"
+
+void time_sleepMS(u32 ms);
+void time_sleepNS(u64 ns);
+u64 time_getMonotonicMS();
+u64 time_getMonotonicNS();

src/main.c

@@ -2,13 +2,61 @@
 #include "instructions/instructions.h"
 #include "collections/List.h"
 #include "compiler/Compiler.h"
+#include "VM/Display/Display.h"
+#include <SDL3/SDL.h>
 
 #define arg_is(STR) (strcmp(argv[argi], STR) == 0)
 
 i32 compileSources(cstr source_file, cstr out_file, bool debug_log);
 i32 bootFromImage(cstr image_file);
 
+#define assert_sdl(EXPR) if(!(EXPR)) { printf("assert failed: %s\nSDL_Error: %s\n", #EXPR, SDL_GetError()); return false; }
+
+bool test_display(){
+    Display* display = Display_create(STR("le display"), 1600, 900, DisplayFlags_Default);
+    assert_sdl(display != NULL);
+
+    i64 fps = 60;
+    i64 nsec_per_frame = 1e9 / fps;
+    for(u32 i = 0; i < 600; i++){
+        static i64 last_frame_time = 0;
+        i64 current_frame_time = SDL_GetTicksNS();
+        i64 delta_time = current_frame_time - last_frame_time;
+        last_frame_time = current_frame_time;
+
+        SDL_Event event;
+        while(SDL_PollEvent(&event)) {
+            if(event.type == SDL_EVENT_WINDOW_CLOSE_REQUESTED){
+                printfe("event WINDOW_CLOSE");
+                return 0;
+            }
+            if(event.type == SDL_EVENT_QUIT){
+                printfe("event QUIT");
+                return 0;
+            }
+        }
+
+        assert_sdl(Display_setDrawingColor(display, ColorRGBA_create(200, 200, 200, 255)));
+        assert_sdl(Display_clear(display));
+        assert_sdl(Display_setDrawingColor(display, ColorRGBA_create(240, 40, 40, 255)));
+        assert_sdl(Display_fillRect(display, Rect_create(i, i, 64, 64)));
+        assert_sdl(Display_swapBuffers(display));
+        
+        i64 time_ellapsed = SDL_GetTicksNS() - last_frame_time;
+        i64 delay = nsec_per_frame - time_ellapsed;
+        if (delay > 0) {
+            SDL_DelayNS(delay);
+        }
+    }
+
+    Display_destroy(display);
+    return true;
+}
+
 i32 main(const i32 argc, cstr* argv){
+    test_display();
+    return 0;
+
     if(argc < 2){
         printfe("ERROR: no arguments provided. Use --help to know more.\n");
         return 1;

src/std.h

@@ -8,6 +8,7 @@
 #include <time.h>
 #include <math.h>
 #include <string.h>
+#include <stdbool.h>
 
 typedef int8_t i8;
 typedef uint8_t u8;
@@ -20,10 +21,6 @@ typedef uint64_t u64;
 typedef float f32;
 typedef double f64;
 
-typedef u8 bool;
-#define true  1
-#define false 0
-
 typedef const char* cstr;
 
 #if defined(_WIN64) || defined(_WIN32)