Add Raylib "Platform"

.gitignore

@@ -1,3 +1,4 @@
 game.o
 sdl_main
+raylib_main
 *.swp

build.sh

@@ -4,5 +4,6 @@ set -xe
 
 clang -Wall -Wextra -Wswitch-enum -c game.c
 clang -Wall -Wextra -Wswitch-enum -o sdl_main sdl_main.c game.o -lSDL2 -lSDL2_ttf -lm
+clang -Wall -Wextra -Wswitch-enum -I./include/ -o raylib_main raylib_main.c game.o -L./lib/ -lraylib -lm
 
 clang -Os -fno-builtin -Wall -Wextra -Wswitch-enum --target=wasm32 --no-standard-libraries -Wl,--export=game_init -Wl,--export=game_render -Wl,--export=game_update -Wl,--export=game_info -Wl,--export=game_keydown -Wl,--no-entry -Wl,--allow-undefined  -o game.wasm game.c

game.c

@@ -1,7 +1,7 @@
 #include "./game.h"
 
 // #define FEATURE_DYNAMIC_CAMERA
-// #define FEATURE_DEV
+#define FEATURE_DEV
 
 #define STB_SPRINTF_IMPLEMENTATION
 #include "stb_sprintf.h"
@@ -52,6 +52,23 @@ static void platform_assert(const char *file, i32 line, b32 cond, const char *me
 #define RAND_A 6364136223846793005ULL
 #define RAND_C 1442695040888963407ULL
 
+typedef enum {
+    ALIGN_LEFT,
+    ALIGN_RIGHT,
+    ALIGN_CENTER,
+} Align;
+
+static void fill_text_aligned(i32 x, i32 y, const char *text, u32 size, u32 color, Align align)
+{
+    u32 width = platform_text_width(text, size);
+    switch (align) {
+    case ALIGN_LEFT:                 break;
+    case ALIGN_CENTER: x -= width/2; break;
+    case ALIGN_RIGHT:  x -= width;   break;
+    }
+    platform_fill_text(x, y, text, size, color);
+}
+
 static u32 rand(void)
 {
     static u64 rand_state = 0;
@@ -578,26 +595,26 @@ void game_render(void)
         background_render();
         egg_render();
         snake_render();
-        platform_fill_text(SCORE_PADDING, SCORE_PADDING, game.score_buffer, SCORE_FONT_SIZE, SCORE_FONT_COLOR, ALIGN_LEFT);
+        fill_text_aligned(SCORE_PADDING, SCORE_PADDING, game.score_buffer, SCORE_FONT_SIZE, SCORE_FONT_COLOR, ALIGN_LEFT);
     }
     break;
 
     case STATE_PAUSE: {
         background_render();
         egg_render();
         snake_render();
-        platform_fill_text(SCORE_PADDING, SCORE_PADDING, game.score_buffer, SCORE_FONT_SIZE, SCORE_FONT_COLOR, ALIGN_LEFT);
+        fill_text_aligned(SCORE_PADDING, SCORE_PADDING, game.score_buffer, SCORE_FONT_SIZE, SCORE_FONT_COLOR, ALIGN_LEFT);
         // TODO: "Pause", "Game Over" are not centered vertically
-        platform_fill_text(game.width/2, game.height/2, "Pause", PAUSE_FONT_SIZE, PAUSE_FONT_COLOR, ALIGN_CENTER);
+        fill_text_aligned(game.width/2, game.height/2, "Pause", PAUSE_FONT_SIZE, PAUSE_FONT_COLOR, ALIGN_CENTER);
     }
     break;
 
     case STATE_GAMEOVER: {
         background_render();
         egg_render();
         dead_snake_render();
-        platform_fill_text(SCORE_PADDING, SCORE_PADDING, game.score_buffer, SCORE_FONT_SIZE, SCORE_FONT_COLOR, ALIGN_LEFT);
-        platform_fill_text(game.width/2, game.height/2, "Game Over", GAMEOVER_FONT_SIZE, GAMEOVER_FONT_COLOR, ALIGN_CENTER);
+        fill_text_aligned(SCORE_PADDING, SCORE_PADDING, game.score_buffer, SCORE_FONT_SIZE, SCORE_FONT_COLOR, ALIGN_LEFT);
+        fill_text_aligned(game.width/2, game.height/2, "Game Over", GAMEOVER_FONT_SIZE, GAMEOVER_FONT_COLOR, ALIGN_CENTER);
     }
     break;
 
@@ -607,7 +624,7 @@ void game_render(void)
     }
 
 #ifdef FEATURE_DEV
-    platform_fill_text(game.width - SCORE_PADDING, SCORE_PADDING, "Dev", SCORE_FONT_SIZE, SCORE_FONT_COLOR, ALIGN_RIGHT);
+    fill_text_aligned(game.width - SCORE_PADDING, SCORE_PADDING, "Dev", SCORE_FONT_SIZE, SCORE_FONT_COLOR, ALIGN_RIGHT);
     Rect rect = { .w = COLS*CELL_SIZE, .h = ROWS*CELL_SIZE };
     stroke_rect(rect, 0xFF0000FF);
 #endif

game.h

@@ -1,5 +1,5 @@
 #ifndef GAME_H_
-#define GAME_H_ 
+#define GAME_H_
 
 #include <stddef.h>
 
@@ -10,16 +10,10 @@ typedef int i32;
 typedef int b32;
 typedef float f32;
 
-typedef enum {
-    ALIGN_LEFT,
-    ALIGN_RIGHT,
-    ALIGN_CENTER,
-} Align;
-
 void platform_fill_rect(i32 x, i32 y, i32 w, i32 h, u32 color);
 void platform_stroke_rect(i32 x, i32 y, i32 w, i32 h, u32 color);
-void platform_fill_text(i32 x, i32 y, const char *text, u32 size, u32 color, Align align);
-void platform_stroke_line(i32 x1, i32 y1, i32 x2, i32 y2, u32 color);
+void platform_fill_text(i32 x, i32 y, const char *text, u32 size, u32 color);
+u32 platform_text_width(const char *text, u32 size);
 void platform_panic(const char *file_path, i32 line, const char *message);
 void platform_log(const char *message);
 

include/math.h

@@ -0,0 +1,17 @@
+// Phony math.h. Since we are compiling with --no-standard-libraries raymath.h can't find math.h.
+// But it only needs it for few function definitions. So we've put those definitions here.
+#ifndef MATH_H_
+#define MATH_H_
+float floorf(float);
+float fabsf(float);
+double fabs(double);
+float fmaxf(float, float);
+float fminf(float, float);
+float sqrtf(float);
+float atan2f(float, float);
+float cosf(float);
+float sinf(float);
+float acosf(float);
+float asinf(float);
+double tan(double);
+#endif // MATH_H_