games/dino: binary size optimization (fix #537) (#632)

- Size (fit into 8192 bytes or 16 IMG sectors):
  - Drop `ulist` in favor of static arrays
  - Dropping `malloc`/`free`/`exit`; `sprintf`, `pow`, `strlen` and 64-bit division no longer pull in libc and libtcc1
  - Dead code removed

- Rendering:
  - libimg dropped. `png2h.py` turns the original PNG into a palette-indexed atlas; the blit writes a 32bpp buffer, sysfn 65 puts it on screen - the same call `img_draw` made. No runtime PNG decode, output pixel-identical. The buffer ends at the ground line: 18% fewer pixels per frame

- Bugs fixed:
  - Every fourth pterodactyl was invisible and unhittable: `getRandomNumber` is inclusive, so `yPosArr[3]` read the next field (999) and the bird spawned off-screen
  - Releasing the jump key never shortened the first jump: gated on a flag set only after the intro; Chrome gates on the loop being scheduled
  - Flap rate `1000/6` truncated to 166, `minSpeed` 8.5 to 8 - birds came earlier than in Chrome
  - Hardcoded caption height clipped the window on every non-default skin
  - A maximum jump left the buffer and cut off the dino's head; the playfield is centered now
  - Obstacles and clouds leaked: nodes were freed, their data never

- Localization:
  - Caption localized to EN/RU/ES via `CONFIG_LANG`, fits every skin in the tree

Reviewed-on: #632
Reviewed-by: Kiril Lipatov <lipatov.kiril@gmail.com>
Reviewed-by: Ivan B <1+dunkaist@noreply.localhost>

programs/games/dino/.gitignore

@@ -0,0 +1 @@
+DINO

programs/games/dino/Makefile

@@ -8,10 +8,9 @@ KPACK = kpack
 
 SRC = $(wildcard *.c)
 FLAGS= -B$(KTCC_DIR)/bin -I $(KLIBC)/include -Wall# -stack=20480
-LIBS = -limg
 
 all: $(SRC)
-	$(KTCC) $(FLAGS) $(SRC) $(LIBS) -o $(NAME)
+	$(KTCC) $(FLAGS) $(SRC) -o $(NAME)
 # $(KPACK) $(NAME)
 
 clean:

programs/games/dino/Tupfile.lua

@@ -5,6 +5,14 @@ then
 end
 tup.include(HELPERDIR .. "/use_tcc.lua")
 
+if tup.getconfig("LANG") == "ru_RU"
+then C_LANG = "LANG_RUS"
+elseif tup.getconfig("LANG") == "es_ES"
+then C_LANG = "LANG_SPA"
+else C_LANG = "LANG_ENG" -- this includes default case without config
+end
+CFLAGS = CFLAGS .. " -D" .. C_LANG
+
 SRCS = {
     "cloud.c",
     "game_over_panel.c",
@@ -16,10 +24,7 @@ SRCS = {
     "graphics.c",
     "horizon_line.c",
     "misc.c",
-    "runner.c",
-    "ulist.c"
+    "runner.c"
 }
 
-LIBS = " -limg"
-
 link_tcc(SRCS, "dino");

programs/games/dino/cloud.c

@@ -1,9 +1,7 @@
 #include "cloud.h"
 
-void cloudInit(Cloud* cloud, int w) {
-	cloud->width = w;
-	cloud->xPos = w;
-	cloud->yPos = 0;
+void cloudInit(Cloud* cloud) {
+	cloud->xPos = DEFAULT_WIDTH;
 	cloud->remove = false;
 	cloud->cloudGap = getRandomNumber(CLOUD_MIN_GAP, CLOUD_MAX_GAP);
 
@@ -12,11 +10,10 @@ void cloudInit(Cloud* cloud, int w) {
 }
 
 void cloudDraw(const Cloud* cloud) {
-	graphicsBlitAtlasImage(ATLAS_CLOUD_X, ATLAS_CLOUD_Y, cloud->xPos, cloud->yPos, CLOUD_WIDTH, CLOUD_HEIGHT, false);
+	graphicsBlitAtlasImage(ATLAS_CLOUD_X, ATLAS_CLOUD_Y, cloud->xPos, cloud->yPos, CLOUD_WIDTH, CLOUD_HEIGHT);
 }
 
 void cloudUpdate(Cloud* cloud, double speed) {
-	// printf("cloudUpdate(., %f)\n", speed);
 	if (!cloud->remove) {
 		cloud->xPos -= (int)ceil(speed);
 		cloudDraw(cloud);
@@ -31,4 +28,3 @@ void cloudUpdate(Cloud* cloud, double speed) {
 bool cloudIsVisible(const Cloud* cloud) {
 	return cloud->xPos + CLOUD_WIDTH > 0;
 }
-

programs/games/dino/cloud.h

@@ -14,14 +14,13 @@
 #define CLOUD_MIN_SKY_LEVEL 71
 
 typedef struct {
-	int width;
 	int xPos;
 	int yPos;
 	bool remove;
 	int cloudGap;
 } Cloud;
 
-void cloudInit(Cloud* cloud, int w);
+void cloudInit(Cloud* cloud);
 void cloudDraw(const Cloud* cloud);
 void cloudUpdate(Cloud* cloud, double speed);
 bool cloudIsVisible(const Cloud* cloud);

programs/games/dino/collisionbox.h

@@ -1,11 +1,12 @@
 #ifndef COLLISIONBOX_H
 #define COLLISIONBOX_H
 
+// All box coordinates fit in a byte (max value is 58)
 typedef struct {
-    int x;
-    int y;
-    int width;
-    int height;
+    signed char x;
+    signed char y;
+    signed char width;
+    signed char height;
 } CollisionBox;
 
 #endif

programs/games/dino/config.h

@@ -3,17 +3,32 @@
 
 #define DEFAULT_WIDTH 600
 #define DEFAULT_HEIGHT 200
+
+#define GAME_HEIGHT 150
+#define GAME_BOTTOM_PAD 10
+#define GAME_Y_OFFSET ((DEFAULT_HEIGHT - GAME_HEIGHT) / 2)
+#define BUFFER_HEIGHT (GAME_Y_OFFSET + GAME_HEIGHT - GAME_BOTTOM_PAD)
+
 #define FPS 60
+#define FRAME_TIME 30 // sysfn 5 sleeps in 10 ms steps
 
 #define DELTA_MS_DEFAULT 20
 
-#define WINDOW_TITLE "DINO. Jump: UP/SPACE  Duck: DOWN  Restart: jump or ENTER"
+// The leading \3 tells the kernel the caption is UTF-8 (see gui/window.inc)
+#ifdef LANG_RUS
+#define WINDOW_TITLE "\3DINO [ПРЫЖОК-ВВЕРХ/ПРОБЕЛ ПРИСЕД-ВНИЗ РЕСТАРТ-ПРЫЖОК/ВВОД]"
+#elif defined LANG_SPA
+#define WINDOW_TITLE "\3DINO [SALTO-ARRIBA/ESPACIO AGACHADA-ABAJO REINICIO-SALTO/ENTER]"
+#else
+#define WINDOW_TITLE "\3DINO [JUMP-UP/SPACE DUCK-DOWN RESTART-JUMP/ENTER]"
+#endif
 
 // #define DBG
 
 #ifdef DBG
+#include <stdio.h>
 #define dbg_printf(...) debug_printf(__VA_ARGS__)
-#else 
+#else
 #define dbg_printf(...)
 #endif
 

programs/games/dino/distance_meter.c

@@ -2,55 +2,32 @@
 
 DistanceMeter distanceMeter;
 
-void distanceMeterInit(int w) {
-	distanceMeter.x = 0;
-	distanceMeter.y = 5;
-	distanceMeter.currentDistance = 0;
-	distanceMeter.maxScore = 0;
-	distanceMeter.achievement = false;
-	distanceMeter.flashTimer = 0;
-	distanceMeter.flashIterations = 0;
-	distanceMeter.invertTrigger = false;
+void distanceMeterInit() {
+	// in BSS: everything not set here starts at zero
+	distanceMeter.maxScore = 99999; // 10^DM_MAX_DISTANCE_UNITS - 1
 	distanceMeter.maxScoreUnits = DM_MAX_DISTANCE_UNITS;
-	distanceMeterCalcXPos(w);
 	for (int i = 0; i < distanceMeter.maxScoreUnits; i++) {
 		distanceMeterDraw(i, 0, false);
 	}
-	distanceMeter.maxScore = (int)pow(10, distanceMeter.maxScoreUnits) - 1;
-	distanceMeter.digits[0] = '\0';
-	distanceMeter.highScore[0] = '\0';
-}
-
-void distanceMeterCalcXPos(int w) {
-	distanceMeter.x = w - (DM_DEST_WIDTH * (distanceMeter.maxScoreUnits + 1));
 }
 
 void distanceMeterDraw(int digitPos, int value, bool opt_highscore) {
-
-	int dx, dy;
+	int dx = DM_X;
 	if (opt_highscore) {
-		dx = distanceMeter.x - (distanceMeter.maxScoreUnits * 2) * DM_WIDTH;
-		dy = distanceMeter.y;
+		dx -= (distanceMeter.maxScoreUnits * 2) * DM_WIDTH;
 	}
-	else {
-		dx = distanceMeter.x;
-		dy = distanceMeter.y;
-	}
-	//printf("%d %d %d  %d %d    %d\n", digitPos, value, opt_highscore, dx, dy, DM_WIDTH * value + ATLAS_TEXT_SPRITE_X);
 	graphicsBlitAtlasImage(
 		DM_WIDTH * value + ATLAS_TEXT_SPRITE_X,
 		0 + ATLAS_TEXT_SPRITE_Y,
 		digitPos * DM_DEST_WIDTH + dx,
-		distanceMeter.y + dy,
+		DM_Y * 2, // chrome translates by y and then draws at targetY == y
 		DM_WIDTH,
-		DM_HEIGHT,
-		false
+		DM_HEIGHT
 	);
 }
 
 void distanceMeterDrawHighScore() {
-	// TODO canvasCtx.globalAlpha = .8;
-	for (int i = (int)strlen(distanceMeter.highScore) - 1; i >= 0; i--) {
+	for (int i = distanceMeter.highScoreLen - 1; i >= 0; i--) {
 		distanceMeterDraw(i, distanceMeter.highScore[i] > 12 ? distanceMeter.highScore[i] - '0' : distanceMeter.highScore[i], true);
 	}
 }
@@ -61,6 +38,7 @@ void distanceMeterSetHighScore(int _distance) {
 	distanceMeter.highScore[1] = 11;
 	distanceMeter.highScore[2] = 12;
 	intToStr(distance, distanceMeter.maxScoreUnits, distanceMeter.highScore + 3);
+	distanceMeter.highScoreLen = 3 + distanceMeter.maxScoreUnits;
 }
 
 void distanceMeterReset() {
@@ -69,7 +47,8 @@ void distanceMeterReset() {
 }
 
 int distanceMeterGetActualDistance(int distance) {
-	return distance ? (int)round(distance * DM_COEFFICIENT) : 0;
+	// round(distance * 0.025); 0.025 == 1/40
+	return (distance + 20) / 40;
 }
 
 bool distanceMeterUpdate(int deltaTime, int _distance) {
@@ -83,9 +62,6 @@ bool distanceMeterUpdate(int deltaTime, int _distance) {
 			distanceMeter.maxScoreUnits++;
 			distanceMeter.maxScore = distanceMeter.maxScore * 10 + 9;
 		}
-		// else {
-			// NOTE this.distance was in original but i didsnt see any usage of this field
-		// }
 
 		if (distance > 0) {
 			// Acheivement unlocked

programs/games/dino/distance_meter.h

@@ -2,38 +2,33 @@
 #define DISTANCE_METER_H
 
 #include <stdbool.h>
-#include <string.h>
-#include <math.h>
 #include "graphics.h"
 #include "misc.h"
 
 #define DM_MAX_DISTANCE_UNITS 5
 #define DM_ACHIEVEMENT_DISTANCE 100
-#define DM_COEFFICIENT 0.025
 #define DM_FLASH_DURATION 1000/4
 #define DM_FLASH_ITERATIONS 3
 #define DM_WIDTH 10
 #define DM_HEIGHT 13
 #define DM_DEST_WIDTH 11
+#define DM_X (DEFAULT_WIDTH - DM_DEST_WIDTH * (DM_MAX_DISTANCE_UNITS + 1))
+#define DM_Y 5
 
 typedef struct {
-	int x;
-	int y;
-	int currentDistance;
 	int maxScore;
 	char digits[16];
 	char highScore[16];
+	int highScoreLen; // written length; strlen would drag in a libc import
 	bool achievement;
 	int flashTimer;
 	int flashIterations;
-	bool invertTrigger;
 	int maxScoreUnits;
 } DistanceMeter;
 
 extern DistanceMeter distanceMeter;
 
-void distanceMeterInit(int w);
-void distanceMeterCalcXPos(int w);
+void distanceMeterInit();
 void distanceMeterDraw(int digitPos, int value, bool opt_highscore);
 int distanceMeterGetActualDistance(int distance);
 bool distanceMeterUpdate(int deltaTime, int _distance);

programs/games/dino/game_over_panel.c

@@ -1,22 +1,9 @@
 #include "game_over_panel.h"
 
-GameOverPanel gameOverPanel;
-
-void gameOverPanelInit(int width, int height) {
-	gameOverPanel.width = width;
-	gameOverPanel.height = height;
-}
-
 void gameOverPanelDraw() {
-    double centerX = gameOverPanel.width / 2;
-    int textTargetX = (int)round(centerX - (GOP_TEXT_WIDTH / 2));
-    int textTargetY = (int)round((gameOverPanel.height - 25) / 3);
-    int restartTargetX = centerX - (GOP_RESTART_WIDTH / 2);
-    int restartTargetY = gameOverPanel.height / 2;
-    // Game over text from sprite
+    // On the 600x150 canvas: round(300 - 191/2), round((150-25)/3), 300 - 36/2, 150/2
     graphicsBlitAtlasImage(GOP_TEXT_X + ATLAS_TEXT_SPRITE_X, GOP_TEXT_Y + ATLAS_TEXT_SPRITE_Y,
-        textTargetX, textTargetY, GOP_TEXT_WIDTH, GOP_TEXT_HEIGHT, false);
-    // Restart button
+        205, 41, GOP_TEXT_WIDTH, GOP_TEXT_HEIGHT);
     graphicsBlitAtlasImage(ATLAS_RESTART_X, ATLAS_RESTART_Y,
-        restartTargetX, restartTargetY, GOP_RESTART_WIDTH, GOP_RESTART_HEIGHT, false);
+        282, 75, GOP_RESTART_WIDTH, GOP_RESTART_HEIGHT);
 }

programs/games/dino/game_over_panel.h

@@ -1,7 +1,6 @@
 #ifndef GAME_OVER_PANEL_H
 #define GAME_OVER_PANEL_H
 
-#include <math.h>
 #include "graphics.h"
 
 #define GOP_TEXT_X 0
@@ -11,14 +10,6 @@
 #define GOP_RESTART_WIDTH 36
 #define GOP_RESTART_HEIGHT 32
 
-typedef struct {
-	int width;
-	int height;
-} GameOverPanel;
-
-extern GameOverPanel gameOverPanel;
-
-void gameOverPanelInit(int width, int height);
 void gameOverPanelDraw();
 
 #endif

programs/games/dino/graphics.c

@@ -1,39 +1,18 @@
 #include "graphics.h"
 #include "sprites.h"
-#include <assert.h>
 
 
-Image* screenImage;
-static Image* spriteAtlas;
+// 32bpp: sysfn 65 copies it as is, indices would cost a kernel lookup per pixel
+static unsigned screenImage[DEFAULT_WIDTH * BUFFER_HEIGHT];
 
 
-void graphicsInit() {
-    spriteAtlas = img_decode((void*)sprites100, sizeof(sprites100), 0);
-    *((uint8_t*)spriteAtlas->Palette + 3) = 0; // set black as transparent
-    // for (int i = 0; i < 16; i++) {
-    //     dbg_printf("%x\n", *((uint8_t*)spriteAtlas->Palette + i));
-    // }
-    if (spriteAtlas->Type != IMAGE_BPP32) {
-        spriteAtlas = img_convert(spriteAtlas, NULL, IMAGE_BPP32, 0, 0);
-        if (!spriteAtlas) {
-            dbg_printf("spriteAtlas convert error\n");
-            exit(-1);
-        }
-    }
-    dbg_printf("spriteAtlas->Type = %d\n", spriteAtlas->Type);
-    screenImage = img_create(DEFAULT_WIDTH, DEFAULT_HEIGHT, IMAGE_BPP32);
-}
+void graphicsBlitAtlasImage(int atlasX, int atlasY, int destX, int destY, int w, int h) {
+    destY += GAME_Y_OFFSET; // playfield coordinates -> buffer coordinates
 
-void graphicsBlitAtlasImage(int atlasX, int atlasY, int destX, int destY, int w, int h, bool center) {
-    // dbg_printf("start graphicsBlitAtlasImage ax = %d ay = %d dx = %d dy = %d w = %d h = %d %x %x\n", atlasX, atlasY, destX, destY, w, h, screenImage, spriteAtlas);
-
-    int screen_width = (int)screenImage->Width;
-    int screen_height = (int)screenImage->Height;
-    
-    if (destX >= screen_width) {
+    if (destX >= DEFAULT_WIDTH) {
         return;
     }
-     if (destY >= screen_height) {
+    if (destY >= BUFFER_HEIGHT) {
         return;
     }
 
@@ -42,8 +21,8 @@ void graphicsBlitAtlasImage(int atlasX, int atlasY, int destX, int destY, int w,
         w = destX + w;
         destX = 0;
     }
-    if (destX + w > screen_width) {
-        w = screen_width - destX;
+    if (destX + w > DEFAULT_WIDTH) {
+        w = DEFAULT_WIDTH - destX;
     }
 
     if (destY < 0) {
@@ -51,37 +30,38 @@ void graphicsBlitAtlasImage(int atlasX, int atlasY, int destX, int destY, int w,
         h = destY + h;
         destY = 0;
     }
-    if (destY + h > screen_height) {
-        h = screen_height - destY;
+    if (destY + h > BUFFER_HEIGHT) {
+        h = BUFFER_HEIGHT - destY;
     }
 
     if (w <= 0 || h <= 0) {
         return;
     }
 
-    //printf("start graphicsBlitAtlasImage ax = %d ay = %d dx = %d dy = %d w = %d h = %d %x %x\n\n", atlasX, atlasY, destX, destY, w, h, screenImage, spriteAtlas);
-
-    img_blend(screenImage, spriteAtlas, destX, destY, atlasX, atlasY, w, h);
-
-    // dbg_printf("end graphicsBlitAtlasImage\n\n");
+    const unsigned char* src = SPRITE_ATLAS + atlasY * ATLAS_WIDTH + atlasX;
+    unsigned* dst = screenImage + destY * DEFAULT_WIDTH + destX;
+    for (int y = 0; y < h; y++) {
+        for (int x = 0; x < w; x++) {
+            unsigned char idx = src[x];
+            if (idx)
+                dst[x] = DINO_PALETTE[idx];
+        }
+        src += ATLAS_WIDTH;
+        dst += DEFAULT_WIDTH;
+    }
 }
 
-void graphicsFillBackground(unsigned r, unsigned g, unsigned b) {
-    img_fill_color(screenImage, screenImage->Width, screenImage->Height, (0xFF << 24) | (r << 16) | (g << 8) | b);
+void graphicsFillBackground(void) {
+    unsigned* p = screenImage;
+    for (int i = DEFAULT_WIDTH * BUFFER_HEIGHT; i; --i)
+        *p++ = BACKGROUND_COLOR;
 }
 
 void graphicsRender() {
     // don't redraw window on each frame. redraw window only when redraw event (called when widow moved e.g.)
-    img_draw(screenImage, 5, 24, screenImage->Width, screenImage->Height, 0, 0);
+    ksys_draw_bitmap_palette(screenImage, 0, 0, DEFAULT_WIDTH, BUFFER_HEIGHT, 32, 0, 0);
 }
 
 void graphicsDelay(int ms) {
-    // dbg_printf("ms = %d\n", ms);
-    _ksys_delay(ms/10 ? ms/10 : 2);
-}
-
-
-void graphicsDestroy() {
-    img_destroy(screenImage);
-    img_destroy(spriteAtlas);
+    _ksys_delay((ms + 9) / 10);
 }

programs/games/dino/graphics.h

@@ -1,12 +1,7 @@
 #ifndef GRAPHICS_H
 #define GRAPHICS_H
 
-#include <stdio.h>
-#include <stdbool.h>
-#include <stdlib.h>
-
 #include <sys/ksys.h>
-#include <clayer/libimg.h>
 
 #include "config.h"
 
@@ -18,8 +13,6 @@
 #define ATLAS_CLOUD_Y 2
 #define ATLAS_HORIZON_X 2
 #define ATLAS_HORIZON_Y 54
-#define ATLAS_MOON_X 484
-#define ATLAS_MOON_Y 2
 #define ATLAS_PTERODACTYL_X 134
 #define ATLAS_PTERODACTYL_Y 2
 #define ATLAS_RESTART_X 2
@@ -28,16 +21,13 @@
 #define ATLAS_TEXT_SPRITE_Y 2
 #define ATLAS_TREX_X 848
 #define ATLAS_TREX_Y 2
-#define ATLAS_STAR_X 645
-#define ATLAS_STAR_Y 2
 
-extern Image* screenImage;
+#define WINDOW_BORDER 5           // window skin border
+#define BACKGROUND_COLOR 0xF7F7F7
 
-void graphicsInit();
-void graphicsBlitAtlasImage(int atlasX, int atlasY, int destX, int destY, int w, int h, bool center);
-void graphicsFillBackground(unsigned r, unsigned g, unsigned b);
+void graphicsBlitAtlasImage(int atlasX, int atlasY, int destX, int destY, int w, int h);
+void graphicsFillBackground(void);
 void graphicsRender();
 void graphicsDelay(int ms);
-void graphicsDestroy();
 
 #endif

programs/games/dino/horizon.c

@@ -2,25 +2,15 @@
 
 Horizon horizon;
 
-void horizonInit(int dim_width, double gapCoefficient) {
-	horizon.dim_width = dim_width;
-	horizon.gapCoefficient = gapCoefficient;
-	horizon.obstacles = ulist_create();
-	horizon.obstacleHistory = ulist_create();
-	horizon.clouds = ulist_create();
-
+void horizonInit() {
+	// in BSS: the counts start at zero
 	horizonAddCloud();
 
     horizonLineInit();
 }
 
-void horizonUpdate(int deltaTime, double currentSpeed, bool updateObstacles, bool showNightMode) {
-	//horizon.runningTime += deltaTime;
+void horizonUpdate(int deltaTime, double currentSpeed, bool updateObstacles) {
 	horizonLineUpdate(deltaTime, currentSpeed);
-    // if (currentSpeed != currentSpeed) {
-    //     currentSpeed = 6.0;
-    // }
-	// horizon.nightMode.update(showNightMode);
 	horizonUpdateClouds(deltaTime, currentSpeed);
 	if (updateObstacles) {
 		horizonUpdateObstacles(deltaTime, currentSpeed);
@@ -28,32 +18,29 @@ void horizonUpdate(int deltaTime, double currentSpeed, bool updateObstacles, boo
 }
 
 void horizonUpdateClouds(int deltaTime, double speed) {
-    //printf("horizonUpdateClouds()\n");
     double cloudSpeed = HORIZON_BG_CLOUD_SPEED / 1000 * deltaTime * speed;
-    int numClouds = ulist_size(horizon.clouds);
-    //printf("horizonUpdateClouds() %d\n", numClouds);
 
-    if (numClouds) {
-        Node *cloudNode = horizon.clouds->tail;
-        while (cloudNode != NULL) {
-            cloudUpdate(cloudNode->data, cloudSpeed);
-            cloudNode = cloudNode->prev;
+    if (horizon.cloudCount) {
+        // Update (and draw) the newest cloud first
+        for (int i = horizon.cloudCount - 1; i >= 0; i--) {
+            cloudUpdate(&horizon.clouds[i], cloudSpeed);
         }
-        Cloud *lastCloud = horizon.clouds->tail->data;
-        // Check for adding a new cloud
-        if (numClouds < HORIZON_MAX_CLOUDS && (horizon.dim_width - lastCloud->xPos) > lastCloud->cloudGap && HORIZON_CLOUD_FREQUENCY > (double)rand()/RAND_MAX) {
+        Cloud *lastCloud = &horizon.clouds[horizon.cloudCount - 1];
+        // Check for adding a new cloud (frequency 0.5)
+        if (horizon.cloudCount < HORIZON_MAX_CLOUDS && (DEFAULT_WIDTH - lastCloud->xPos) > lastCloud->cloudGap && rand() <= RAND_MAX / 2) {
             horizonAddCloud();
         }
         // Remove expired clouds
-        cloudNode = horizon.clouds->head;
-        while (cloudNode != NULL) {
-            Node* cloudNodeNext = cloudNode->next;
-            Cloud* c = cloudNode->data;
-            if (c->remove) {
-                ulist_remove(horizon.clouds, cloudNode);
+        int kept = 0;
+        for (int i = 0; i < horizon.cloudCount; i++) {
+            if (!horizon.clouds[i].remove) {
+                if (kept != i) {
+                    horizon.clouds[kept] = horizon.clouds[i];
+                }
+                kept++;
             }
-            cloudNode = cloudNodeNext;
         }
+        horizon.cloudCount = kept;
     }
     else {
         horizonAddCloud();
@@ -61,28 +48,25 @@ void horizonUpdateClouds(int deltaTime, double speed) {
 }
 
 void horizonUpdateObstacles(int deltaTime, double currentSpeed) {
-    //printf("horizonUpdateObstacles()\n");
-    // Obstacles, move to Horizon layer
-    Node* obNode = horizon.obstacles->head;
-    while (obNode != NULL) {
-        Node* obNodeNext = obNode->next;
-        Obstacle* ob = obNode->data;
-        obstacleUpdate(ob, deltaTime, currentSpeed);
-        // Clean up existing obstacles
-        if (ob->remove) {
-            //ulist_remove(horizon.obstacles, obNode);
-            //ulist_print(horizon.obstacles);
-            ulist_remove_front(horizon.obstacles);
-            //ulist_print(horizon.obstacles);
-            //puts("");
-        }
-        obNode = obNodeNext;
+    for (int i = 0; i < horizon.obstacleCount; i++) {
+        obstacleUpdate(&horizon.obstacles[i], deltaTime, currentSpeed);
     }
+    // Clean up removed obstacles
+    int kept = 0;
+    for (int i = 0; i < horizon.obstacleCount; i++) {
+        if (!horizon.obstacles[i].remove) {
+            if (kept != i) {
+                horizon.obstacles[kept] = horizon.obstacles[i];
+            }
+            kept++;
+        }
+    }
+    horizon.obstacleCount = kept;
 
-    if (ulist_size(horizon.obstacles) > 0) {
-        Obstacle *lastObstacle = horizon.obstacles->tail->data;
+    if (horizon.obstacleCount > 0) {
+        Obstacle *lastObstacle = &horizon.obstacles[horizon.obstacleCount - 1];
 
-        if (lastObstacle && !lastObstacle->followingObstacleCreated && obstacleIsVisible(lastObstacle) && (lastObstacle->xPos + lastObstacle->width + lastObstacle->gap) < horizon.dim_width) {
+        if (!lastObstacle->followingObstacleCreated && obstacleIsVisible(lastObstacle) && (lastObstacle->xPos + lastObstacle->width + lastObstacle->gap) < DEFAULT_WIDTH) {
             horizonAddNewObstacle(currentSpeed);
             lastObstacle->followingObstacleCreated = true;
         }
@@ -94,6 +78,9 @@ void horizonUpdateObstacles(int deltaTime, double currentSpeed) {
 }
 
 void horizonAddNewObstacle(double currentSpeed) {
+    if (horizon.obstacleCount >= HORIZON_MAX_OBSTACLES) {
+        return; // no room; retried on a later frame
+    }
     int obstacleTypeIndex = getRandomNumber(0, sizeof(obstacleTypeConfigs)/sizeof(ObstacleTypeConfig) - 1);
     ObstacleTypeConfig *otc = &obstacleTypeConfigs[obstacleTypeIndex];
 
@@ -103,45 +90,36 @@ void horizonAddNewObstacle(double currentSpeed) {
         horizonAddNewObstacle(currentSpeed);
     }
     else {
-        Obstacle* ob = malloc(sizeof(Obstacle));
-        obstacleInit(ob, otc, horizon.dim_width, horizon.gapCoefficient, currentSpeed, otc->width);
-        ulist_push_back(horizon.obstacles, ob);
-        ulist_push_front(horizon.obstacleHistory, &(otc->type));
-        if (ulist_size(horizon.obstacleHistory) > 1) {
-            ulist_splice(horizon.obstacleHistory, RUNNER_MAX_OBSTACLE_DUPLICATION);
+        obstacleInit(&horizon.obstacles[horizon.obstacleCount], otc, currentSpeed, otc->width);
+        horizon.obstacleCount++;
+        // Record the type, newest first, keeping the last few entries
+        for (int i = HORIZON_MAX_OBSTACLE_DUPLICATION - 1; i > 0; i--) {
+            horizon.obstacleHistory[i] = horizon.obstacleHistory[i - 1];
+        }
+        horizon.obstacleHistory[0] = otc->type;
+        if (horizon.obstacleHistoryCount < HORIZON_MAX_OBSTACLE_DUPLICATION) {
+            horizon.obstacleHistoryCount++;
         }
     }
 }
 
 bool horizonDuplicateObstacleCheck(ObstacleType nextObstacleType) {
-    //printf("horizonDuplicateObstacleCheck(%d)\n", nextObstacleType);
     int duplicateCount = 0;
-    Node* ohNode = horizon.obstacleHistory->head;
-    while (ohNode != NULL) {
-        //printf("%d\n", *(int*)ohNode->data);
-        duplicateCount = *(int*)ohNode->data == nextObstacleType ? duplicateCount + 1 : 0;
-        ohNode = ohNode->next;
+    for (int i = 0; i < horizon.obstacleHistoryCount; i++) {
+        duplicateCount = horizon.obstacleHistory[i] == nextObstacleType ? duplicateCount + 1 : 0;
     }
-    //printf("duplicateCount = %d\n\n", duplicateCount);
-    return duplicateCount >= RUNNER_MAX_OBSTACLE_DUPLICATION;
+    return duplicateCount >= HORIZON_MAX_OBSTACLE_DUPLICATION;
 }
 
 void horizonReset() {
-    // printf("horizonReset() !!\n");
-    ulist_destroy(horizon.obstacles);
-    horizon.obstacles = ulist_create();
+    horizon.obstacleCount = 0;
     horizonLineReset();
 }
 
-//void horizonResize(int width, int height) {
-//    
-//}
-
 void horizonAddCloud() {
-    Cloud* c = malloc(sizeof(Cloud));
-    cloudInit(c, horizon.dim_width);
-    //printf("horizonAddCloud() %d -> ", ulist_size(horizon.obstacles));
-    ulist_push_back(horizon.clouds, c);
-    //printf("%d\n", ulist_size(horizon.obstacles));
+    if (horizon.cloudCount >= HORIZON_MAX_CLOUDS) {
+        return;
+    }
+    cloudInit(&horizon.clouds[horizon.cloudCount]);
+    horizon.cloudCount++;
 }
-

programs/games/dino/horizon.h

@@ -1,41 +1,37 @@
 #ifndef HORIZON_H
 #define HORIZON_H
 
-#include <math.h>
 #include <stdbool.h>
 #include "obstacle.h"
 #include "cloud.h"
 #include "horizon_line.h"
 #include "runner.h"
 #include "graphics.h"
-#include "ulist.h"
 
 #define HORIZON_BG_CLOUD_SPEED 0.2
-#define HORIZON_BUMPY_THRESHOLD 0.3
-#define HORIZON_CLOUD_FREQUENCY 0.5
-#define HORIZON_HORIZON_HEIGHT 16
 #define HORIZON_MAX_CLOUDS 6
 
+#define HORIZON_MAX_OBSTACLES 8 // ~5 fit on screen at the smallest gaps
+#define HORIZON_MAX_OBSTACLE_DUPLICATION 2
+
 typedef struct {
-	int dim_width;
-	double gapCoefficient;
-	Ulist* obstacles;
-	Ulist* obstacleHistory;
-	// nightMode
-	Ulist* clouds;
+	Obstacle obstacles[HORIZON_MAX_OBSTACLES];
+	int obstacleCount;
+	ObstacleType obstacleHistory[HORIZON_MAX_OBSTACLE_DUPLICATION];
+	int obstacleHistoryCount;
+	Cloud clouds[HORIZON_MAX_CLOUDS];
+	int cloudCount;
 } Horizon;
 
 extern Horizon horizon;
 
-void horizonInit(int dim_width, double gapCoefficient);
-void horizonUpdate(int deltaTime, double currentSpeed, bool updateObstacles, bool showNightMode);
+void horizonInit();
+void horizonUpdate(int deltaTime, double currentSpeed, bool updateObstacles);
 void horizonUpdateClouds(int deltaTime, double speed);
 void horizonUpdateObstacles(int deltaTime, double currentSpeed);
-//void horizonRemoveFirstObstacle();
 void horizonAddNewObstacle(double currentSpeed);
 bool horizonDuplicateObstacleCheck(ObstacleType nextObstacleType);
 void horizonReset();
-//void horizonResize(int width, int height);
 void horizonAddCloud();
 
 #endif

programs/games/dino/horizon_line.c

@@ -3,25 +3,21 @@
 HorizonLine horizonLine;
 
 void horizonLineInit() {
-	horizonLine.width = HORIZON_LINE_WIDTH;
-	horizonLine.height = HORIZON_LINE_HEIGHT;
+	// in BSS: xPos[0] starts at zero
 	horizonLine.sourceXPos[0] = ATLAS_HORIZON_X;
-	horizonLine.sourceXPos[1] = ATLAS_HORIZON_X + horizonLine.width;
-	horizonLine.bumpThreshold = 0.5;
-	horizonLine.xPos[0] = 0;
-	horizonLine.xPos[1] = horizonLine.width;
-	horizonLine.yPos = HORIZON_LINE_YPOS;
+	horizonLine.sourceXPos[1] = ATLAS_HORIZON_X + HORIZON_LINE_WIDTH;
+	horizonLine.xPos[1] = HORIZON_LINE_WIDTH;
 	horizonLineDraw();
 }
 
 void horizonLineDraw() {
-	//printf("horizonLineDraw(); xPos[0] = %d, xPos[1] = %d, yPos = %d, width = %d, height = %d\n", horizonLine.xPos[0], horizonLine.xPos[1], horizonLine.yPos, horizonLine.width, horizonLine.height);
-	graphicsBlitAtlasImage(horizonLine.sourceXPos[0], ATLAS_HORIZON_Y, horizonLine.xPos[0], horizonLine.yPos, horizonLine.width, horizonLine.height, false);
-	graphicsBlitAtlasImage(horizonLine.sourceXPos[1], ATLAS_HORIZON_Y, horizonLine.xPos[1], horizonLine.yPos, horizonLine.width, horizonLine.height, false);
+	graphicsBlitAtlasImage(horizonLine.sourceXPos[0], ATLAS_HORIZON_Y, horizonLine.xPos[0], HORIZON_LINE_YPOS, HORIZON_LINE_WIDTH, HORIZON_LINE_HEIGHT);
+	graphicsBlitAtlasImage(horizonLine.sourceXPos[1], ATLAS_HORIZON_Y, horizonLine.xPos[1], HORIZON_LINE_YPOS, HORIZON_LINE_WIDTH, HORIZON_LINE_HEIGHT);
 }
 
 int horizonLineGetRandomType() {
-	return (double)rand() / RAND_MAX > horizonLine.bumpThreshold ? horizonLine.width : 0;
+	// bump threshold 0.5
+	return rand() > RAND_MAX / 2 ? HORIZON_LINE_WIDTH : 0;
 }
 
 void horizonLineUpdateXPos(int pos, int increment) {
@@ -29,28 +25,28 @@ void horizonLineUpdateXPos(int pos, int increment) {
 	int line2 = pos == 0 ? 1 : 0;
 
 	horizonLine.xPos[line1] -= increment;
-	horizonLine.xPos[line2] = horizonLine.xPos[line1] + horizonLine.width;
+	horizonLine.xPos[line2] = horizonLine.xPos[line1] + HORIZON_LINE_WIDTH;
 
-	if (horizonLine.xPos[line1] <= -horizonLine.width) {
-		horizonLine.xPos[line1] += horizonLine.width * 2;
-		horizonLine.xPos[line2] = horizonLine.xPos[line1] - horizonLine.width;
+	if (horizonLine.xPos[line1] <= -HORIZON_LINE_WIDTH) {
+		horizonLine.xPos[line1] += HORIZON_LINE_WIDTH * 2;
+		horizonLine.xPos[line2] = horizonLine.xPos[line1] - HORIZON_LINE_WIDTH;
 		horizonLine.sourceXPos[line1] = horizonLineGetRandomType() + ATLAS_HORIZON_X;
 	}
 }
 
 void horizonLineUpdate(int deltaTime, double speed) {
-	int increment = floor(speed * (FPS / 1000.0) * deltaTime);
+	// value is always positive, so truncation == floor
+	int increment = speed * (FPS / 1000.0) * deltaTime;
 	if (horizonLine.xPos[0] <= 0) {
 		horizonLineUpdateXPos(0, increment);
 	}
 	else {
 		horizonLineUpdateXPos(1, increment);
 	}
-	// asm_inline("int $3");
 	horizonLineDraw();
 }
 
 void horizonLineReset() {
 	horizonLine.xPos[0] = 0;
-	horizonLine.xPos[1] = horizonLine.width;
+	horizonLine.xPos[1] = HORIZON_LINE_WIDTH;
 }

programs/games/dino/horizon_line.h

@@ -1,10 +1,7 @@
 #ifndef HORIZON_LINE_H
 #define HORIZON_LINE_H
 
-#include <stdio.h>
 #include <stdlib.h>
-#include <stdbool.h>
-#include <math.h>
 #include "config.h"
 #include "graphics.h"
 
@@ -13,12 +10,8 @@
 #define HORIZON_LINE_YPOS 127
 
 typedef struct {
-	int width;
-	int height;
 	int sourceXPos[2];
 	int xPos[2];
-	int yPos;
-	double bumpThreshold;
 } HorizonLine;
 
 extern HorizonLine horizonLine;

programs/games/dino/main.c

@@ -1,9 +1,5 @@
 #include <stdbool.h>
-#include <stdio.h>
-#include <stdbool.h>
 #include <stdlib.h>
-#include <string.h>
-#include <time.h>
 
 #include <sys/ksys.h>
 
@@ -16,121 +12,73 @@
 #include "trex.h"
 #include "runner.h"
 
-static uint8_t keyboard_layout[128];
-
 int main(int argc, char* args[]) {
-	srand((unsigned int)time(NULL)); // Seed the random number generator
+	srand((unsigned int)_ksys_get_ns_count()); // Seed the random number generator
 
 	ksys_pos_t win_pos = _ksys_screen_size();
 	win_pos.x /= 2;
 	win_pos.x -= DEFAULT_WIDTH/2;
 	win_pos.y /= 2;
 	win_pos.y -= DEFAULT_HEIGHT/2;
-	dbg_printf("wx = %d, wy = %d\n", win_pos.x, win_pos.y);
-	ksys_colors_table_t sys_color_table;
-    _ksys_get_system_colors(&sys_color_table);
 	_ksys_set_event_mask(0xC0000027); // !
 	_ksys_set_key_input_mode(KSYS_KEY_INPUT_MODE_SCANC);
-	_ksys_keyboard_layout(KSYS_KEYBOARD_LAYOUT_NORMAL, keyboard_layout);
-
-	graphicsInit();
 
 	runnerInit();
 
 	dbg_printf("dino started\n");
 
 	int ext_code = 0;
-    uint8_t old_mode = 0;
 
-	bool quit = false;
-	while (quit == false) {
+	for (;;) {
 		int frameStartTime = getTimeStamp();
-		//printf("frameStartTime = %d\n", frameStartTime);
-        uint32_t kos_event = _ksys_check_event();
-        switch (kos_event) {
+        switch (_ksys_check_event()) {
 		case KSYS_EVENT_BUTTON:
-			switch (_ksys_get_button()){
-			case 1:
-				quit = true;
-				break;
-			default:
-				break;
-			}
-			break;
+			_ksys_get_button();
+			_ksys_exit(); // the close button is the only one
 		case KSYS_EVENT_KEY:
 			{
 				ksys_oskey_t key = _ksys_get_key();
-				uint8_t scancode = key.code;
-				if (scancode == 0xE0 || scancode == 0xE1) {
-                    ext_code = scancode;
+				unsigned char scancode = key.code;
+				if (scancode == 0xE0) {
+                    ext_code = 0x100;
                     break;
                 }
-                if (ext_code == 0xE1 && (scancode & 0x7F) == 0x1D) {
-                    break;
-                }
-                if (ext_code == 0xE1 && scancode == 0xC5) {
-                    ext_code = 0;
-                    break;
-                }
-                uint8_t code = keyboard_layout[scancode & 0x7F];
- 
-                if (ext_code == 0xE0) {
-					code -= 96;
-				}
+                int code = (scancode & 0x7F) | ext_code;
                 ext_code = 0;
-				
+
 				if (scancode < 128) { // KEYDOWN
-					//dbg_printf("Keydown: key = 0x%x, scancode = 0x%x, code = 0x%x (%u) state = 0x%x\n", key.val, scancode, code, code, key.state);
-					//dbg_printf("keydown c  = %u\n", key.code);
 					runnerOnKeyDown(code);
 				} else { // KEYUP
-					//dbg_printf("Keyup: key = 0x%x, scancode = 0x%x, code = 0x%x (%u) state = 0x%x\n", key.val, scancode, code, code, key.state);
-					//dbg_printf("keyup c  = %u\n", key.code);
 					runnerOnKeyUp(code);
 				}
 			}
 			break;
 		case KSYS_EVENT_REDRAW:
-			//dbg_printf("KSYS_EVENT_REDRAW\n");
 			_ksys_start_draw();
-    		_ksys_create_window(win_pos.x, win_pos.y, screenImage->Width + 10, screenImage->Height + 29, WINDOW_TITLE, sys_color_table.work_area, 0x54); // 0x54. note: C = 1 !!
+			_ksys_create_window(
+				win_pos.x, win_pos.y,
+				DEFAULT_WIDTH + 2*WINDOW_BORDER,
+				DEFAULT_HEIGHT + _ksys_get_skin_height() + WINDOW_BORDER,
+				WINDOW_TITLE, BACKGROUND_COLOR, 0x34);
 			graphicsRender();
 			_ksys_end_draw();
-			break; 
+			break;
 		default:
 			break;
 		}
 
 		if (runner.nextUpdateScheduled) {
-			//printf("runner update! %u\n", getTimeStamp());
-			//dbg_printf("runnerUpdate\n");
 			runnerUpdate();
 		}
-		else {
-			if (runner.skipUpdateNow) {
-				//printf("Skipped one update\n");
-				runner.nextUpdateScheduled = true;
-				runner.skipUpdateNow = false;
-			}
-		}
 
 		int frameTime = getTimeStamp() - frameStartTime;
 		if (frameTime < 0) {
 			frameTime = DELTA_MS_DEFAULT;
 		}
-#define FRAME_TIME 20 //16
-		// dbg_printf("frameTime = %d\n", frameTime);
-		if (frameTime < FRAME_TIME) { // 1000ms/60frames = 16.(6)
-			// printf("frameTime = %d\n", frameTime);
-			if (runner.crashed) {
-				// dbg_printf("runner.timeAfterCrashedMs +=\n");
-				runner.timeAfterCrashedMs += FRAME_TIME - frameTime;
-			}
+		if (frameTime < FRAME_TIME) {
 			graphicsDelay(FRAME_TIME - frameTime);
 		}
 	}
 
-	graphicsDestroy();
-
 	return 0;
 }

programs/games/dino/misc.c

@@ -4,25 +4,22 @@ int getRandomNumber(int _min, int _max) {
 	return rand() % (_max - _min + 1) + _min;
 }
 
+// Zero-padded decimal, keeps only the last ndigits (num is never negative here)
 void intToStr(int num, int ndigits, char* result) {
-	char num_str[16]; // 16 more than enough for int
-	sprintf(num_str, "%d", num); // Convert num to a string
-	if (strlen(num_str) > ndigits) {
-		// Copy only the last ndigits to result
-		strcpy(result, num_str + strlen(num_str) - ndigits);
-	}
-	else {
-		// Pad the string with leading zeros until it reaches a length of ndigits
-		size_t z = ndigits - strlen(num_str);
-		for (size_t i = 0; i < z; i++) {
-			result[i] = '0';
-		}
-		strcpy(result + z, num_str);
+	result[ndigits] = '\0';
+	for (int i = ndigits - 1; i >= 0; i--) {
+		result[i] = '0' + num % 10;
+		num /= 10;
 	}
 }
 
 int getTimeStamp() { // in ms
-	uint64_t x = 0;
-	x = _ksys_get_ns_count();
-	return (x/1000000);
+	// Any long long here would link all of libtcc1
+	unsigned lo, hi;
+	// sysfn 26.10: nanosecond counter in edx:eax
+	asm_inline("int $0x40" : "=a"(lo), "=d"(hi) : "a"(26), "b"(10));
+	// low 32 bits of ns/1000000: (hi%d):lo divided by d always fits
+	hi %= 1000000;
+	asm_inline("divl %2" : "+a"(lo), "+d"(hi) : "r"(1000000u));
+	return lo;
 }

programs/games/dino/misc.h

@@ -1,11 +1,18 @@
 #ifndef MISC_H
 #define MISC_H
 
-#include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 #include <sys/ksys.h>
 
+// ktcc's ksys.h provides max as a macro, newlib's does not
+#ifndef max
+#define max(a, b) ((a) > (b) ? (a) : (b))
+#endif
+
+#define GAME_RAND_MAX 0x7FFFFFFF
+
+unsigned gameRand(void);
+void gameSeed(unsigned seed);
 int getRandomNumber(int _min, int _max);
 void intToStr(int num, int ndigits, char* result);
 int getTimeStamp();

programs/games/dino/obstacle.c

@@ -54,21 +54,20 @@ ObstacleTypeConfig obstacleTypeConfigs[3] = {
 				{.x = 10, .y = 8, .width = 6, .height = 9}
 			},
 			.numFrames = 2,
-			.frameRate = 1000 / 6,
+			.frameRate = 1000 / 6.,
 			.speedOffset = 0.8
 		}
 };
 
-int obstacleSpritePosX[3] = { ATLAS_CACTUS_SMALL_X, ATLAS_CACTUS_LARGE_X, ATLAS_PTERODACTYL_X};
-int obstacleSpritePosY[3] = { ATLAS_CACTUS_SMALL_Y, ATLAS_CACTUS_LARGE_Y, ATLAS_PTERODACTYL_Y};
+short obstacleSpritePosX[3] = { ATLAS_CACTUS_SMALL_X, ATLAS_CACTUS_LARGE_X, ATLAS_PTERODACTYL_X};
+short obstacleSpritePosY[3] = { ATLAS_CACTUS_SMALL_Y, ATLAS_CACTUS_LARGE_Y, ATLAS_PTERODACTYL_Y};
 
 
-void obstacleInit(Obstacle* ob, const ObstacleTypeConfig *otc, int dim_width, double gapCoefficient, double speed, int opt_xOffset) {
+void obstacleInit(Obstacle* ob, const ObstacleTypeConfig *otc, double speed, int opt_xOffset) {
 	ob->typeConfig = *otc;
-	ob->gapCoefficient = gapCoefficient;
 	ob->size = getRandomNumber(1, OBSTACLE_MAX_OBSTACLE_LENGTH);
 	ob->remove = false;
-	ob->xPos = dim_width + opt_xOffset;
+	ob->xPos = DEFAULT_WIDTH + opt_xOffset;
 	ob->yPos = 0;
 
 	// For animated obstacles
@@ -83,7 +82,8 @@ void obstacleInit(Obstacle* ob, const ObstacleTypeConfig *otc, int dim_width, do
 	ob->width = ob->typeConfig.width * ob->size;
 
 	if (ob->typeConfig.yPos == -1) {
-		ob->yPos = ob->typeConfig.yPosArr[getRandomNumber(0, ob->typeConfig.yPosArrSize)];
+		// getRandomNumber is inclusive on both ends
+		ob->yPos = ob->typeConfig.yPosArr[getRandomNumber(0, ob->typeConfig.yPosArrSize - 1)];
 	}
 	else {
 		ob->yPos = ob->typeConfig.yPos;
@@ -107,27 +107,25 @@ void obstacleInit(Obstacle* ob, const ObstacleTypeConfig *otc, int dim_width, do
 
 	// For obstacles that go at a different speed from the horizon
 	if (ob->typeConfig.speedOffset) {
-		ob->typeConfig.speedOffset = (double)rand() / RAND_MAX > 0.5 ? ob->typeConfig.speedOffset : -ob->typeConfig.speedOffset;
+		ob->typeConfig.speedOffset = rand() > RAND_MAX / 2 ? ob->typeConfig.speedOffset : -ob->typeConfig.speedOffset;
 	}
-	ob->gap = obstacleGetGap(ob, ob->gapCoefficient, speed);
+	ob->gap = obstacleGetGap(ob, speed);
 }
 
 void obstacleDraw(const Obstacle *ob) {
 	int sourceWidth = ob->typeConfig.width;
 	int sourceHeight = ob->typeConfig.height;
-	int sourceX = (sourceWidth * ob->size) * (0.5 * ((double)ob->size - 1)) + obstacleSpritePosX[ob->typeConfig.type];
+	int sourceX = sourceWidth * ob->size * (ob->size - 1) / 2 + obstacleSpritePosX[ob->typeConfig.type];
 	if (ob->currentFrame > 0) {
 		sourceX += sourceWidth*ob->currentFrame;
 	}
-	//dbg_printf("od ax=%u, ay=%u, dx=%u, dy=%u, w=%u, h=%u\n", sourceX, obstacleSpritePosY[ob->typeConfig.type], ob->xPos, ob->yPos, sourceWidth*ob->size, sourceHeight);
-	graphicsBlitAtlasImage(sourceX, obstacleSpritePosY[ob->typeConfig.type], ob->xPos, ob->yPos, sourceWidth*ob->size, sourceHeight, false);
+	graphicsBlitAtlasImage(sourceX, obstacleSpritePosY[ob->typeConfig.type], ob->xPos, ob->yPos, sourceWidth*ob->size, sourceHeight);
 }
 
 void obstacleUpdate(Obstacle *ob, int deltaTime, double speed) {
 	if (!ob->remove) {
-		double dx = floor(((speed + ob->typeConfig.speedOffset)*FPS/1000.)*deltaTime);
-		//dbg_printf("sp = %lf, ots = %lf, dx = %d, xpos = %d\n", speed, ob->typeConfig.speedOffset, (int)dx, ob->xPos - dx);
-		ob->xPos -= dx;//floor(((speed + ob->typeConfig.speedOffset)*FPS/1000.)*deltaTime);
+		// value is always positive, so truncation == floor
+		ob->xPos -= (int)(((speed + ob->typeConfig.speedOffset)*FPS/1000.)*deltaTime);
 	}
 	// Update frames
 	if (ob->typeConfig.numFrames > 1) {
@@ -143,8 +141,8 @@ void obstacleUpdate(Obstacle *ob, int deltaTime, double speed) {
 	}
 }
 
-int obstacleGetGap(const Obstacle *ob, double gapCoefficient, double speed) {
-	int minGap = round(ob->width * speed + ob->typeConfig.minGap * gapCoefficient);
+int obstacleGetGap(const Obstacle *ob, double speed) {
+	int minGap = round(ob->width * speed + ob->typeConfig.minGap * OBSTACLE_GAP_COEFFICIENT);
 	int maxGap = round(minGap * OBSTACLE_MAX_GAP_COEFFICIENT);
 	return getRandomNumber(minGap, maxGap);
 }

programs/games/dino/obstacle.h

@@ -12,6 +12,9 @@
 // Coefficient for calculating the maximum gap
 #define OBSTACLE_MAX_GAP_COEFFICIENT 1.5
 
+// Coefficient for calculating the minimum gap
+#define OBSTACLE_GAP_COEFFICIENT 0.6
+
 // Maximum obstacle grouping count
 #define OBSTACLE_MAX_OBSTACLE_LENGTH 3
 
@@ -21,36 +24,35 @@ typedef enum {
     PTERODACTYL = 2
 } ObstacleType;
 
-extern int obstacleSpritePosX[3];
-extern int obstacleSpritePosY[3];
+extern short obstacleSpritePosX[3];
+extern short obstacleSpritePosY[3];
 
+// Every value fits in a short (the largest is 999)
 typedef struct {
-    ObstacleType type;
-    int width;
-    int height;
-    int yPos;
-    int yPosArrSize;
-    int yPosArr[3]; // used if yPos is -1
-    int multipleSpeed;
-    int minGap;
-    int minSpeed;
-    int collisionBoxesCount;
+    short type; // ObstacleType
+    short width;
+    short height;
+    short yPos;
+    short yPosArrSize;
+    short yPosArr[3]; // used if yPos is -1
+    short multipleSpeed;
+    short minGap;
+    float minSpeed; // 8.5 for the pterodactyl: exact in float, must not truncate
+    short collisionBoxesCount;
     CollisionBox collisionBoxes[5];
-    int numFrames;
-    double frameRate;
+    short numFrames;
+    float frameRate;
     double speedOffset;
 } ObstacleTypeConfig;
 
 typedef struct {
     ObstacleTypeConfig typeConfig;
-    double gapCoefficient;
     int size;
     bool remove;
     int xPos;
     int yPos;
     int width;
     int gap;
-    // double speedOffset;
     int currentFrame;
     int timer;
     bool followingObstacleCreated;
@@ -58,10 +60,10 @@ typedef struct {
 
 extern ObstacleTypeConfig obstacleTypeConfigs[3];
 
-void obstacleInit(Obstacle *ob, const ObstacleTypeConfig *otc, int dim_width, double gapCoefficient, double speed, int opt_xOffset);
+void obstacleInit(Obstacle *ob, const ObstacleTypeConfig *otc, double speed, int opt_xOffset);
 void obstacleDraw(const Obstacle* ob);
 void obstacleUpdate(Obstacle* ob, int deltaTime, double speed);
-int obstacleGetGap(const Obstacle* ob, double gapCoefficient, double speed);
+int obstacleGetGap(const Obstacle* ob, double speed);
 bool obstacleIsVisible(const Obstacle* ob);
 
 #endif

programs/games/dino/png2h.py

@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Atlas converter for the Dino game: PNG -> palette-indexed C header.
+# The final binary is kpack-compressed, so the flat index array costs
+# about the same on disk as any pre-compressed encoding would.
+#
+# Usage: python png2h.py sprites100.png sprites.h
+
+import os
+import sys
+
+from PIL import Image
+
+# Regions the game never draws (moon and stars: night mode is not implemented)
+BLANK = [(482, 0, 654, 53)]
+
+def main():
+    src, dst = sys.argv[1], sys.argv[2]
+    img = Image.open(src).convert("RGBA")
+    w, h = img.size
+    pixels = list(img.getdata())
+
+    opaque = [None if a == 0 else (r, g, b) for r, g, b, a in pixels]
+    for x0, y0, x1, y1 in BLANK:
+        for y in range(y0, y1 + 1):
+            for x in range(x0, x1 + 1):
+                opaque[y * w + x] = None
+
+    # Transparent -> 0, remaining colors by frequency -> 1..N
+    freq = {}
+    for c in opaque:
+        if c is not None:
+            freq[c] = freq.get(c, 0) + 1
+    colors = sorted(freq, key=freq.get, reverse=True)
+    index = {c: i + 1 for i, c in enumerate(colors)}
+    data = [0 if c is None else index[c] for c in opaque]
+
+    with open(dst, "w", newline="\n") as f:
+        f.write("// Generated by png2h.py from %s - do not edit\n" % os.path.basename(src))
+        f.write("#pragma once\n\n")
+        f.write("#define ATLAS_WIDTH  %d\n" % w)
+        f.write("#define ATLAS_HEIGHT %d\n\n" % h)
+        f.write("// Index 0 is transparent\n")
+        f.write("static const unsigned DINO_PALETTE[%d] = {\n    0x00000000," % (len(colors) + 1))
+        for r, g, b in colors:
+            f.write(" 0x00%02X%02X%02X," % (r, g, b))
+        f.write("\n};\n\n")
+        f.write("static const unsigned char SPRITE_ATLAS[ATLAS_WIDTH * ATLAS_HEIGHT] = {\n")
+        for y in range(h):
+            row = data[y * w:(y + 1) * w]
+            f.write("    " + ",".join(str(v) for v in row) + ",\n")
+        f.write("};\n")
+
+    print(f"atlas {w}x{h}, {len(colors)} colors + transparent, {len(data)} bytes")
+
+if __name__ == "__main__":
+    main()

programs/games/dino/runner.c

@@ -1,63 +1,32 @@
 #include "runner.h"
 
-int aaaaaaa[10000];
 Runner runner;
-int bbbbbb[10000];
 
 void runnerInit() {
-	runner.distanceRan = 0;
-	runner.highestScore = 0;
-	runner.time = 0;
-	runner.msPerFrame = 1000.0 / FPS;
+	// in BSS: everything not set here starts at zero
 	runner.currentSpeed = RUNNER_SPEED;
-	runner.activated = false;
-	runner.playing = false;
-	runner.crashed = false;
-	runner.timeAfterCrashedMs = 0;
-	runner.paused = false;
-	runner.inverted = false;
-	runner.playingIntro = false;
-	runner.isRunning = false; // is running or game stopped
-	runner.invertTimer = 0;
-	runner.playCount = 0;
-	runner.nextUpdateScheduled = false;
-	runner.skipUpdateNow = false;
 	// TODO sound
-	// runnerLoadImages();
-	runnerAdjustDimensions();
-	// setSpeed
-	graphicsFillBackground(0xF7, 0xF7, 0xF7);
+	graphicsFillBackground();
 
-	gameOverPanelInit(runner.width, runner.height);
-	
-	horizonInit(runner.width, RUNNER_GAP_COEFFICIENT);
-	distanceMeterInit(runner.width);
+	horizonInit();
+	distanceMeterInit();
 	trexInit();
 
-	// this.startListening();
 	runnerUpdate();
-	//window.addEventListener(Runner.events.RESIZE, this.debounceResize.bind(this));
 }
 
-void runnerAdjustDimensions() {
-	runner.width = DEFAULT_WIDTH;
-	runner.height = RUNNER_DEFAULT_HEIGHT;
-	// distance meter ...
+static bool isJumpKey(int key) {
+	return key == RUNNER_KEYCODE_JUMP_1 || key == RUNNER_KEYCODE_JUMP_2;
 }
 
 void runnerOnKeyDown(int key) {
-	if (!runner.crashed && (key == RUNNER_KEYCODE_JUMP_1 || key == RUNNER_KEYCODE_JUMP_2)) {
+	if (!runner.crashed && isJumpKey(key)) {
 		if (!runner.playing) {
-			// this.loadSounds(); // TODO
 			runner.playing = true;
-			//printf("first jump! %u\n", getTimeStamp());
 			runnerUpdate();
-			runner.nextUpdateScheduled = false;
-			runner.skipUpdateNow = true;
 		}
-		//  Play sound effect and jump on starting the game for the first time.
+		// Jump on starting the game for the first time.
 		if (!trex.jumping && !trex.ducking) {
-			// this.playSound(this.soundFx.BUTTON_PRESS); // TODO
 			trexStartJump(runner.currentSpeed);
 		}
 	}
@@ -66,7 +35,6 @@ void runnerOnKeyDown(int key) {
 			// Speed drop, activated only when jump key is not pressed.
 			trexSetSpeedDrop();
 		}
-		//else if (!trex.jumping &&!trex.ducking) {
 		else if (!trex.ducking) {
 			// Duck
 			trexSetDuck(true);
@@ -75,7 +43,7 @@ void runnerOnKeyDown(int key) {
 }
 
 void runnerOnKeyUp(int key) {
-	if (runner.isRunning && (key == RUNNER_KEYCODE_JUMP_1 || key == RUNNER_KEYCODE_JUMP_2)) {
+	if (runner.playing && isJumpKey(key)) {
 		trexEndJump();
 	}
 	else if (key == RUNNER_KEYCODE_DUCK) {
@@ -83,45 +51,26 @@ void runnerOnKeyUp(int key) {
 		trexSetDuck(false);
 	}
 	else if (runner.crashed) {
-		// Check that enough time has elapsed before allowing jump key to restart.
-
-		int now = getTimeStamp();
-		int deltaTime = now - runner.time;
-		// if (deltaTime < 0) {
-		// 	deltaTime = DELTA_MS_DEFAULT;
-		// 	runner.time = 0;
-		// }
-
-		// dbg_printf(".now = %d .deltaTime = %d runner.time = %d\n", now, deltaTime, runner.time);
-		if (key == RUNNER_KEYCODE_RESTART || (runner.timeAfterCrashedMs >= RUNNER_GAMEOVER_CLEAR_TIME && (key == RUNNER_KEYCODE_JUMP_1 || key == RUNNER_KEYCODE_JUMP_2))) {
-			//dbg_printf("timeAfterCrashedMs = %d\n", runner.timeAfterCrashedMs);
+		// Enough time since the crash? runner.time froze there, updates stopped
+		int deltaTime = getTimeStamp() - runner.time;
+		if (key == RUNNER_KEYCODE_RESTART || (deltaTime >= RUNNER_GAMEOVER_CLEAR_TIME && isJumpKey(key))) {
 			runnerRestart();
 		}
 	}
-	else if (runner.paused && (key == RUNNER_KEYCODE_JUMP_1 || key == RUNNER_KEYCODE_JUMP_2)) {
-		trexReset();
-		runnerPlay();
-	}
 }
 
 void runnerClearCanvas() {
-	graphicsFillBackground(0xF7, 0xF7, 0xF7);
-	//graphicsRender();
+	graphicsFillBackground();
 }
 
 void runnerUpdate() {
-	//dbg_printf("runnerUpdate() runner.playing = %d\n", runner.playing);
-	//runner.updatePending = false;
 	int now = getTimeStamp();
-	//printf("now = %d\n", now);
-	int deltaTime = now - (runner.time ? runner.time : 0);
+	int deltaTime = now - runner.time;
 	if (deltaTime < 0) {
 		deltaTime = DELTA_MS_DEFAULT;
 	}
-	// dbg_printf("runnerUpdate() deltaTime = %d\n", deltaTime);
 	runner.time = now;
 	if (runner.playing) {
-		//printf("runnerUpdate() %d\n", getTimeStamp());
 		runnerClearCanvas();
 
 		if (trex.jumping) {
@@ -133,24 +82,23 @@ void runnerUpdate() {
 
 		// First jump triggers the intro.
 		if (trex.jumpCount == 1 && !runner.playingIntro) {
-			//printf("trex.jumpCount = %d\n", trex.jumpCount);
 			runnerPlayIntro();
 		}
 
 		// The horizon doesn't move until the intro is over.
 		if (runner.playingIntro) {
-			horizonUpdate(0, runner.currentSpeed, hasObstacles, false);
+			horizonUpdate(0, runner.currentSpeed, hasObstacles);
 		}
 		else {
 			deltaTime = !runner.activated ? 0 : deltaTime;
-			horizonUpdate(deltaTime, runner.currentSpeed, hasObstacles, runner.inverted);
+			horizonUpdate(deltaTime, runner.currentSpeed, hasObstacles);
 		}
 
 		// Check for collisions.
-		bool collision = hasObstacles && runnerCheckForCollision(horizon.obstacles->head->data);
+		bool collision = hasObstacles && horizon.obstacleCount > 0 && runnerCheckForCollision(&horizon.obstacles[0]);
 
 		if (!collision) {
-			runner.distanceRan += runner.currentSpeed * deltaTime / runner.msPerFrame;
+			runner.distanceRan += runner.currentSpeed * deltaTime / RUNNER_MS_PER_FRAME;
 
 			if (runner.currentSpeed < RUNNER_MAX_SPEED) {
 				runner.currentSpeed += RUNNER_ACCELERATION;
@@ -160,49 +108,21 @@ void runnerUpdate() {
 			runnerGameOver();
 		}
 
-		bool playAchievementSound = distanceMeterUpdate(deltaTime, (int)ceil(runner.distanceRan));
-
-		if (playAchievementSound) {
-			//this.playSound(this.soundFx.SCORE); // TODO
-		}
-
-		/*// Night mode.
-		if (this.invertTimer > this.config.INVERT_FADE_DURATION) {
-			this.invertTimer = 0;
-			this.invertTrigger = false;
-			this.invert();
-		}
-		else if (this.invertTimer) {
-			this.invertTimer += deltaTime;
-		}
-		else {
-			var actualDistance =
-				this.distanceMeter.getActualDistance(Math.ceil(this.distanceRan));
-
-			if (actualDistance > 0) {
-				this.invertTrigger = !(actualDistance %
-					this.config.INVERT_DISTANCE);
-
-				if (this.invertTrigger&& this.invertTimer == = 0) {
-					this.invertTimer += deltaTime;
-					this.invert();
-				}
-			}
-		}*/
+		// TODO sound: returns true when the achievement sound should play
+		distanceMeterUpdate(deltaTime, (int)ceil(runner.distanceRan));
 	}
 
-	runner.nextUpdateScheduled = false;//
+	runner.nextUpdateScheduled = false;
 	if (runner.playing || (!runner.activated && trex.blinkCount < RUNNER_MAX_BLINK_COUNT)) {
 		trexUpdate(deltaTime, -1);
 		runner.nextUpdateScheduled = true;
 	}
-	
+
 	graphicsRender(); // blit all drawn to the screen
-	//printf("runner update end\n\n");
 }
 
 void runnerGameOver() {
-	// this.playSound(this.soundFx.HIT); // TODO
+	// TODO sound
 	runnerStop();
 	runner.crashed = true;
 	distanceMeter.achievement = false;
@@ -221,43 +141,23 @@ void runnerGameOver() {
 
 void runnerStop() {
 	runner.playing = false;
-	runner.paused = true;
-	runner.isRunning = false;
-}
-
-void runnerPlay() {
-	if (!runner.crashed) {
-		runner.playing = true;
-		runner.paused = false;
-		trexUpdate(0, TREX_STATUS_RUNNING);
-		runner.time = getTimeStamp();
-		runnerUpdate();
-	}
 }
 
 void runnerRestart() {
-	if (!runner.isRunning) {
-		runner.playCount++;
-		runner.runningTime = 0;
-		runner.playing = true;
-		runner.crashed = false;
-		runner.timeAfterCrashedMs = 0;
-		runner.distanceRan = 0;
-		runner.currentSpeed = RUNNER_SPEED;
-		runner.time = getTimeStamp();
-		runnerClearCanvas();
-		distanceMeterReset(runner.highestScore);
-		horizonReset();
-		trexReset();
-		//this.playSound(this.soundFx.BUTTON_PRESS);
-		//this.invert(true);
-		runner.isRunning = true;
-		runnerUpdate();
-	}
+	runner.runningTime = 0;
+	runner.playing = true;
+	runner.crashed = false;
+	runner.distanceRan = 0;
+	runner.currentSpeed = RUNNER_SPEED;
+	runner.time = getTimeStamp();
+	runnerClearCanvas();
+	distanceMeterReset();
+	horizonReset();
+	trexReset();
+	runnerUpdate();
 }
 
 void runnerPlayIntro() {
-	//printf("runnerPlayIntro()\n");
 	if (!runner.activated && !runner.crashed) {
 		runner.playingIntro = true;
 		trex.playingIntro = true;
@@ -273,61 +173,43 @@ void runnerStartGame() {
 	runner.runningTime = 0;
 	runner.playingIntro = false;
 	trex.playingIntro = false;
-	runner.playCount++;
-	runner.isRunning = true;
 }
 
-CollisionBox createAdjustedCollisionBox(CollisionBox box, CollisionBox adjustment) {
-	return (CollisionBox){ .x = box.x + adjustment.x, .y = box.y + adjustment.y, .width = box.width, .height = box.height };
-}
-
-// Returns whether boxes intersected
-bool boxCompare(CollisionBox tRexBox, CollisionBox obstacleBox) {
-	// Axis-Aligned Bounding Box method.
-	return (tRexBox.x < obstacleBox.x + obstacleBox.width &&
-		tRexBox.x + tRexBox.width > obstacleBox.x &&
-		tRexBox.y < obstacleBox.y + obstacleBox.height &&
-		tRexBox.height + tRexBox.y > obstacleBox.y);
+// Axis-Aligned Bounding Box method.
+static bool boxesIntersect(int ax, int ay, int aw, int ah, int bx, int by, int bw, int bh) {
+	return ax < bx + bw && ax + aw > bx && ay < by + bh && ay + ah > by;
 }
 
 bool runnerCheckForCollision(const Obstacle* obstacle) {
 	// Adjustments are made to the bounding box as there is a 1 pixel white
-		// border around the t-rex and obstacles.
-	CollisionBox tRexBox = {
-		.x = trex.xPos + 1,
-		.y = trex.yPos + 1,
-		.width = TREX_WIDTH - 2,
-		.height = TREX_HEIGHT - 2 };
-
-	CollisionBox obstacleBox = {
-		.x = obstacle->xPos + 1,
-		.y = obstacle->yPos + 1,
-		.width = obstacle->typeConfig.width * obstacle->size - 2,
-		.height = obstacle->typeConfig.height - 2 };
+	// border around the t-rex and obstacles.
+	int tx = trex.xPos + 1;
+	int ty = trex.yPos + 1;
+	int ox = obstacle->xPos + 1;
+	int oy = obstacle->yPos + 1;
+	int ow = obstacle->typeConfig.width * obstacle->size - 2;
+	int oh = obstacle->typeConfig.height - 2;
 
 	// Simple outer bounds check.
-	if (boxCompare(tRexBox, obstacleBox)) {
-		CollisionBox* tRexCollisionBoxes = &trexDuckingCollisionBox;
+	if (boxesIntersect(tx, ty, TREX_WIDTH - 2, TREX_HEIGHT - 2, ox, oy, ow, oh)) {
+		const CollisionBox* tRexCollisionBoxes = &trexDuckingCollisionBox;
 		int tRexCollisionBoxesCount = 1;
 		if (!trex.ducking) {
 			tRexCollisionBoxes = trexRunningCollisionBox;
 			tRexCollisionBoxesCount = 6;
 		}
 
-		// Detailed axis aligned box check.
+		// Detailed axis aligned box check with boxes adjusted to actual positions.
 		for (int t = 0; t < tRexCollisionBoxesCount; t++) {
+			const CollisionBox* tb = &tRexCollisionBoxes[t];
 			for (int i = 0; i < obstacle->typeConfig.collisionBoxesCount; i++) {
-				// Adjust the box to actual positions.
-				CollisionBox adjTrexBox = createAdjustedCollisionBox(tRexCollisionBoxes[t], tRexBox);
-				CollisionBox adjObstacleBox = createAdjustedCollisionBox(obstacle->typeConfig.collisionBoxes[i], obstacleBox);
-				
-				if (boxCompare(adjTrexBox, adjObstacleBox)) {
-					return true;// [adjTrexBox, adjObstacleBox] ;
+				const CollisionBox* cb = &obstacle->typeConfig.collisionBoxes[i];
+				if (boxesIntersect(tb->x + tx, tb->y + ty, tb->width, tb->height,
+				                   cb->x + ox, cb->y + oy, cb->width, cb->height)) {
+					return true;
 				}
 			}
 		}
 	}
 	return false;
 }
-
-

programs/games/dino/runner.h

@@ -2,77 +2,44 @@
 #define RUNNER_H
 
 #include <stdbool.h>
+#include <math.h>
 #include "config.h"
-#include "ulist.h"
 #include "graphics.h"
 #include "horizon.h"
 #include "distance_meter.h"
 #include "game_over_panel.h"
 #include "trex.h"
 
-#define RUNNER_DEFAULT_HEIGHT 150
-
 #define RUNNER_ACCELERATION 0.001
-#define RUNNER_BG_CLOUD_SPEED 0.2
-#define RUNNER_BOTTOM_PAD 10
 #define RUNNER_CLEAR_TIME 3000
-#define RUNNER_CLOUD_FREQUENCY 0.5
 #define RUNNER_GAMEOVER_CLEAR_TIME 750
-#define RUNNER_GAP_COEFFICIENT 0.6
-#define RUNNER_GRAVITY 0.6
-#define RUNNER_INITIAL_JUMP_VELOCITY 12
-#define RUNNER_INVERT_FADE_DURATION 12000
-#define RUNNER_INVERT_DISTANCE 700
 #define RUNNER_MAX_BLINK_COUNT 3
-#define RUNNER_MAX_CLOUDS 6
-#define RUNNER_MAX_OBSTACLE_LENGTH 3
-#define RUNNER_MAX_OBSTACLE_DUPLICATION 2
+#define RUNNER_MS_PER_FRAME (1000.0 / FPS)
 #define RUNNER_MAX_SPEED 13.0
-#define RUNNER_MIN_JUMP_HEIGHT 35
-#define RUNNER_MOBILE_SPEED_COEFFICIENT 1.2
 #define RUNNER_SPEED 6.0
-#define RUNNER_SPEED_DROP_COEFFICIENT 3
 
-#define RUNNER_KEYCODE_JUMP_1 82
-#define RUNNER_KEYCODE_JUMP_2 32
-#define RUNNER_KEYCODE_DUCK 81
-#define RUNNER_KEYCODE_RESTART 13
+// Scancodes; 0x100 marks the E0 extended prefix
+#define RUNNER_KEYCODE_JUMP_1 0x148  // up arrow
+#define RUNNER_KEYCODE_JUMP_2 0x39   // space
+#define RUNNER_KEYCODE_DUCK 0x150    // down arrow
+#define RUNNER_KEYCODE_RESTART 0x1C  // enter
 
 typedef struct {
-	int width;
-	int height;
 	double distanceRan;
 	int highestScore;
 	int time;
 	int runningTime;
-	double msPerFrame;
-	double azazzaza; //
 	double currentSpeed;
-	// Ulist* obstacles;
 	bool activated;
 	bool playing;
 	bool crashed;
-	int timeAfterCrashedMs;
-	bool paused;
-	bool inverted;
-	bool invertTimer;
 	bool playingIntro;
-	bool isRunning;
-	// resizeTimerId_
-	int playCount;
-	// soundFx
-	// audioContext
-	// images
-	// imagesLoaded
 	bool nextUpdateScheduled;
-	bool skipUpdateNow;
 } Runner;
 
 extern Runner runner;
 
 void runnerInit();
-void runnerAdjustDimensions();
-//void runnerLoadImages();
 
 void runnerClearCanvas();
 
@@ -83,7 +50,6 @@ void runnerOnKeyDown(int key);
 void runnerOnKeyUp(int key);
 void runnerGameOver();
 void runnerStop();
-void runnerPlay();
 void runnerRestart();
 
 bool runnerCheckForCollision(const Obstacle *obstacle);

programs/games/dino/sprites.h

@@ -1,169 +1,81 @@
-// Original chrome dino sprite pack
-static const char sprites100[] = {
-  0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d, 0x49, 0x48, 0x44, 0x52,
-  0x00, 0x00, 0x04, 0xd1, 0x00, 0x00, 0x00, 0x44, 0x08, 0x00, 0x00, 0x00, 0x00, 0x8a, 0x23, 0xfc,
-  0x41, 0x00, 0x00, 0x00, 0x02, 0x74, 0x52, 0x4e, 0x53, 0x00, 0x00, 0x76, 0x93, 0xcd, 0x38, 0x00,
-  0x00, 0x0a, 0x0e, 0x49, 0x44, 0x41, 0x54, 0x78, 0x01, 0xec, 0x9d, 0x5b, 0x76, 0xa4, 0xb8, 0x16,
-  0x44, 0x83, 0xbb, 0xb8, 0x0f, 0x4d, 0x84, 0xa1, 0xd8, 0x03, 0x80, 0x4f, 0x0d, 0x4f, 0x9f, 0xa9,
-  0x01, 0x54, 0x0d, 0x85, 0x89, 0xe8, 0x93, 0xae, 0x57, 0xac, 0xab, 0xaa, 0x68, 0xf2, 0x58, 0x2d,
-  0xd2, 0x98, 0xf4, 0xd9, 0xbd, 0x3a, 0x13, 0x9f, 0x07, 0x95, 0x18, 0x57, 0x38, 0x24, 0x01, 0x05,
-  0xc7, 0x71, 0x1c, 0xc7, 0x71, 0x1c, 0xe7, 0xc3, 0x31, 0xe0, 0x3b, 0x05, 0xf7, 0x08, 0x38, 0x8e,
-  0x15, 0xc0, 0x84, 0x83, 0x29, 0x08, 0x6f, 0x2b, 0x43, 0xb8, 0x1f, 0xd8, 0x80, 0xa1, 0xb7, 0x85,
-  0x65, 0x2c, 0x7c, 0x58, 0x82, 0xb4, 0x76, 0xac, 0xf8, 0xce, 0xd4, 0x11, 0x83, 0x55, 0xdd, 0x10,
-  0x23, 0x5f, 0x5f, 0xf0, 0x93, 0x19, 0x40, 0xe6, 0x36, 0x32, 0x43, 0x3f, 0xa3, 0x33, 0xb8, 0xc9,
-  0xca, 0x2a, 0xc4, 0x34, 0x63, 0xe0, 0x26, 0xcb, 0x19, 0xe2, 0xae, 0xea, 0xe6, 0xc7, 0x52, 0xa0,
-  0x84, 0x0b, 0xd6, 0x5e, 0x80, 0x11, 0x00, 0x4a, 0xc4, 0x3d, 0x4a, 0x40, 0x07, 0xf2, 0xb3, 0xbc,
-  0xae, 0x98, 0x70, 0x02, 0x25, 0xf2, 0x50, 0xf6, 0x02, 0xdb, 0x02, 0x6c, 0x43, 0x4f, 0x4b, 0x55,
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-};
+// Generated by png2h.py from sprites100.png - do not edit
+#pragma once
+
+#define ATLAS_WIDTH  1233
+#define ATLAS_HEIGHT 68
+
+// Index 0 is transparent
+static const unsigned DINO_PALETTE[5] = {
+    0x00000000, 0x00535353, 0x00F7F7F7, 0x00FFFFFF, 0x00DADADA,
+};
+
+static const unsigned char SPRITE_ATLAS[ATLAS_WIDTH * ATLAS_HEIGHT] = {
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