Optimize graphx

examples/library_examples/graphx/sprites_rotate_scale/src/main.c

@@ -1,12 +1,23 @@
 #include <ti/getcsc.h>
 #include <graphx.h>
+#include <math.h>
+#include <time.h>
 
 /* Include the converted image data */
 #include "gfx/gfx.h"
 
+float cosine_interpolate(float t, float min_val, float max_val) {
+    /* Interpolates between min_val and max_val on a cosine wave */
+    /* t = 0 returns min_val */
+    float amplitude = (min_val - max_val) / 2.0f;
+    float offset = (min_val + max_val) / 2.0f;
+    return amplitude * cosf(t) + offset;
+}
+
 int main(void)
 {
-    uint8_t x = 0;
+    const int x_center = GFX_LCD_WIDTH / 2;
+    const int y_center = GFX_LCD_HEIGHT / 2;
 
     /* Initialize graphics drawing */
     gfx_Begin();
@@ -18,22 +29,36 @@ int main(void)
     /* Draw to buffer to avoid artifacts */
     gfx_SetDrawBuffer();
 
+    /* Record the start time */
+    const clock_t start_time = clock();
+
     /* Rotate the sprite until a key is pressed */
-    do
-    {
+    do {
+        /* Get the elasped time in seconds */
+        float time_elasped = (float)(clock() - start_time) / CLOCKS_PER_SEC;
+
+        /* Complete one rotation every 5 seconds */
+        uint8_t rotation = fmodf(time_elasped * 256.0f / 5.0f, 256.0f);
+
+        /* Interpolates between 75% and 250% scale (64 = 100% scale) */
+        uint8_t scale = (uint8_t)cosine_interpolate(time_elasped, 48, 160);
+
+        /* The output size of the sprite can be calculated with this formula */
+        uint8_t output_size = (scale * star_width) / 64;
+
+        /* Calculate the x and y position to center the sprite */
+        int x_pos = x_center - output_size / 2;
+        int y_pos = y_center - output_size / 2;
 
         /* Draw a rotated transparent scaled spite */
-        gfx_RotatedScaledTransparentSprite_NoClip(star, 120, 80, 256 - x, 128);
+        gfx_RotatedScaledTransparentSprite_NoClip(star, x_pos, y_pos, rotation, scale);
 
         /* Show the buffered screen */
         gfx_BlitBuffer();
 
         /* Clear the old drawn sprite */
         gfx_FillScreen(1);
 
-        /* Change the rotation amount */
-        x++;
-
     } while (!os_GetCSC());
 
     /* End graphics drawing */

examples/library_examples/graphx/text_custom/autotest.json

@@ -16,7 +16,11 @@
     "key|enter",
     "hashWait|2",
     "key|enter",
-    "hashWait|3"
+    "hashWait|3",
+    "key|enter",
+    "hashWait|4",
+    "key|enter",
+    "hashWait|5"
   ],
   "hashes":
   {
@@ -25,16 +29,30 @@
       "description": "Test custom font display",
       "start": "vram_start",
       "size": "vram_8_size",
-      "expected_CRCs": [ "F717BF65" ]
+      "expected_CRCs": [ "711E0ED5" ]
     },
     "2":
     {
-      "description": "Test hidden font display",
+      "description": "Before: ***",
       "start": "vram_start",
       "size": "vram_8_size",
-      "expected_CRCs": [ "EDA09A59" ]
+      "expected_CRCs": [ "1BD16129" ]
     },
     "3":
+    {
+      "description": "After:  ***",
+      "start": "vram_start",
+      "size": "vram_8_size",
+      "expected_CRCs": [ "B090D407" ]
+    },
+    "4":
+    {
+      "description": "Test hidden font display",
+      "start": "vram_start",
+      "size": "vram_8_size",
+      "expected_CRCs": [ "0170C971" ]
+    },
+    "5":
     {
       "description": "Test program exit",
       "start": "vram_start",

examples/library_examples/graphx/text_custom/src/main.c

@@ -9,8 +9,6 @@ static unsigned char font8x8_spacing[128];
 
 int main(void)
 {
-    int i;
-
     /* Initialize graphics drawing */
     gfx_Begin();
 
@@ -24,15 +22,30 @@ int main(void)
     /* Waits for a key */
     while (!os_GetCSC());
 
+    PrintCentered("Before: ***");
+
+    /* Waits for a key */
+    while (!os_GetCSC());
+
+    /* Get a pointer to the character data for '*' by passing in NULL */
+    unsigned char *char_ptr = gfx_SetCharData('*', NULL);
+
+    /* Invert the pixels of '*' */
+    for (int i = 0; i < 8; i++) {
+        char_ptr[i] = ~char_ptr[i];
+    }
+
+    PrintCentered("After:  ***");
+
+    /* Waits for a key */
+    while (!os_GetCSC());
+
     /* Change the font by shifting each character up 1 */
-    for (i = 127; i > 0; --i)
+    for (int i = 127; i > 0; --i)
     {
         gfx_SetCharData(i, &font8x8[(i - 1) * 8]);
     }
 
-    /* Clear old string */
-    gfx_FillScreen(255);
-
     /* Print with the changed font */
     PrintCentered("Uijt!tusjoh!xbt!ijeefo\"");
 
@@ -48,9 +61,12 @@ int main(void)
 /* Prints a screen centered string */
 void PrintCentered(const char *str)
 {
-    gfx_PrintStringXY(str,
-                      (GFX_LCD_WIDTH - gfx_GetStringWidth(str)) / 2,
-                      (GFX_LCD_HEIGHT - 8) / 2);
+    /* Clear old string */
+    gfx_FillScreen(255);
+
+    int x_center = (GFX_LCD_WIDTH - gfx_GetStringWidth(str)) / 2;
+    int y_center = (GFX_LCD_HEIGHT - 8) / 2;
+    gfx_PrintStringXY(str, x_center, y_center);
 }
 
 static unsigned char font8x8_spacing[128] =
@@ -181,7 +197,7 @@ static unsigned char font8x8[128 * 8] =
 	0x00, 0x00, 0x00, 0x7e, 0x46, 0x62, 0x62, 0x7e,	// Char 111 (o)
 	0x00, 0x00, 0x00, 0x7e, 0x46, 0x42, 0x7e, 0x60,	// Char 112 (p)
 	0x60, 0x00, 0x00, 0x7e, 0x46, 0x42, 0x7e, 0x02,	// Char 113 (q)
-	0x02, 0x00, 0x00, 0x7e, 0x46, 0x60, 0x60, 0x60,	// Char 114 (r)
+	0x00, 0x00, 0x00, 0x7e, 0x46, 0x60, 0x60, 0x60,	// Char 114 (r)
 	0x00, 0x00, 0x00, 0x7c, 0x40, 0x7c, 0x04, 0x7c,	// Char 115 (s)
 	0x00, 0x10, 0x10, 0x3c, 0x10, 0x10, 0x18, 0x1c,	// Char 116 (t)
 	0x00, 0x00, 0x00, 0x46, 0x46, 0x62, 0x62, 0x7e,	// Char 117 (u)

examples/library_examples/graphx/tilemap/.gitignore

@@ -3,5 +3,6 @@ bin/
 src/gfx/*.c
 src/gfx/*.h
 src/gfx/*.8xv
+src/tilemap/*.c
 .DS_Store
 convimg.yaml.lst

examples/library_examples/graphx/tilemap_appvar/.gitignore

@@ -3,5 +3,6 @@ bin/
 src/gfx/*.c
 src/gfx/*.h
 src/gfx/*.8xv
+src/tilemap/*.c
 .DS_Store
 convimg.yaml.lst

examples/library_examples/graphx/tilemap_compressed/.gitignore

@@ -3,5 +3,6 @@ bin/
 src/gfx/*.c
 src/gfx/*.h
 src/gfx/*.8xv
+src/tilemap/*.c
 .DS_Store
 convimg.yaml.lst