Fire: * Improved greyscale palette. * Fixed colour mode (palette was inverted, an d the multiplication factor was chosen in a way that the 'flames' heated up infinitely (avalanche effect). * Better adjustment to the various LCD sizes. * Tweaks and cleanup.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10902 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 97 insertions, 103 deletions

diff --git a/apps/plugins/fire.c b/apps/plugins/fire.c
index 82770f3132..d161f577f5 100644
--- a/apps/plugins/fire.c
+++ b/apps/plugins/fire.c
@@ -31,12 +31,13 @@ PLUGIN_HEADER
 /******************************* Globals ***********************************/
 
 static struct plugin_api* rb; /* global api struct pointer */
-static unsigned char *gbuf;
-static unsigned int gbuf_size = 0;
 
 static unsigned char fire[LCD_HEIGHT+3][LCD_WIDTH];
 static unsigned char cooling_map[LCD_HEIGHT][LCD_WIDTH];
+
 #ifndef HAVE_LCD_COLOR
+static unsigned char *gbuf;
+static unsigned int gbuf_size = 0;
 static unsigned char draw_buffer[8*LCD_WIDTH];
 #endif
 
@@ -96,94 +97,93 @@ static unsigned char draw_buffer[8*LCD_WIDTH];
 #endif
 
 #define MIN_FLAME_VALUE 0
-#if LCD_HEIGHT > 64
-#define COOL_MAX 5
-#else
-#define COOL_MAX 8
+#define COOL_MAX (440/LCD_HEIGHT+2)
+
+/* fast unsigned multiplication (16x16bit->32bit or 32x32bit->32bit,
+ * whichever is faster for the architecture) */
+#ifdef CPU_ARM
+#define FMULU(a, b) ((uint32_t) (((uint32_t) (a)) * ((uint32_t) (b))))
+#else /* SH1, coldfire */
+#define FMULU(a, b) ((uint32_t) (((uint16_t) (a)) * ((uint16_t) (b))))
 #endif
 
-/* unsigned 16 bit multiplication (a single instruction on the SH) */
-#define MULU16(a, b) ((unsigned long) \
-                     (((unsigned short) (a)) * ((unsigned short) (b))))
-
 #ifndef HAVE_LCD_COLOR
-static const unsigned char palette[255]=
-{/* logarithmic histogram equalisation */
-
-      0,  15,  31,  50,  63,  74,  82,  89,  95, 101, 105, 110, 114, 118, 121,
-    124, 127, 130, 133, 135, 137, 140, 142, 144, 146, 148, 149, 151, 153, 154,
-    156, 158, 159, 160, 162, 163, 164, 166, 167, 168, 169, 170, 172, 173, 174,
-    175, 176, 177, 178, 179, 180, 180, 181, 182, 183, 184, 185, 186, 186, 187,
-    188, 189, 189, 190, 191, 192, 192, 193, 194, 194, 195, 196, 196, 197, 198,
-    198, 199, 199, 200, 201, 201, 202, 202, 203, 203, 204, 204, 205, 206, 206,
-    207, 207, 208, 208, 209, 209, 210, 210, 210, 211, 211, 212, 212, 213, 213,
-    214, 214, 215, 215, 215, 216, 216, 217, 217, 217, 218, 218, 219, 219, 219,
-    220, 220, 221, 221, 221, 222, 222, 222, 223, 223, 223, 224, 224, 225, 225,
-    225, 226, 226, 226, 227, 227, 227, 228, 228, 228, 229, 229, 229, 229, 230,
-    230, 230, 231, 231, 231, 232, 232, 232, 232, 233, 233, 233, 234, 234, 234,
-    234, 235, 235, 235, 236, 236, 236, 236, 237, 237, 237, 237, 238, 238, 238,
-    238, 239, 239, 239, 239, 240, 240, 240, 240, 241, 241, 241, 241, 242, 242,
-    242, 242, 243, 243, 243, 243, 244, 244, 244, 244, 244, 245, 245, 245, 245,
-    246, 246, 246, 246, 246, 247, 247, 247, 247, 247, 248, 248, 248, 248, 249,
-    249, 249, 249, 249, 250, 250, 250, 250, 250, 251, 251, 251, 251, 251, 252,
-    252, 252, 252, 252, 252, 253, 253, 253, 253, 253, 254, 254, 254, 254, 254
+static const unsigned char palette[256] = {
+      0,   1,   3,   4,   6,   7,   9,  10,  12,  13,  15,  16,  18,  19,  21,  22,
+     24,  25,  27,  28,  30,  31,  33,  34,  36,  37,  39,  40,  42,  43,  45,  46,
+     48,  49,  51,  52,  54,  55,  57,  59,  60,  61,  63,  64,  66,  67,  69,  70,
+     72,  73,  75,  76,  78,  79,  81,  82,  84,  85,  87,  88,  90,  91,  93,  94,
+     96,  97,  99, 100, 102, 103, 105, 106, 108, 109, 111, 112, 114, 115, 117, 118,
+    120, 121, 123, 124, 126, 127, 129, 130, 132, 133, 135, 136, 138, 139, 141, 142,
+    144, 145, 147, 148, 150, 151, 153, 154, 156, 157, 159, 160, 162, 163, 165, 166,
+    168, 169, 171, 172, 174, 175, 177, 178, 180, 181, 183, 184, 186, 187, 189, 190,
+    192, 193, 195, 196, 198, 199, 201, 202, 204, 205, 207, 208, 210, 211, 213, 214,
+    216, 217, 219, 220, 222, 223, 225, 226, 228, 229, 231, 232, 234, 235, 237, 238,
+    /* 'regular' fire doesn't exceed this value */
+    240, 240, 240, 240, 240, 240, 241, 241, 241, 241, 241, 241, 242, 242, 242, 242,
+    242, 242, 243, 243, 243, 243, 243, 243, 244, 244, 244, 244, 244, 244, 245, 245,
+    245, 245, 245, 245, 246, 246, 246, 246, 246, 246, 247, 247, 247, 247, 247, 247,
+    248, 248, 248, 248, 248, 248, 249, 249, 249, 249, 249, 249, 250, 250, 250, 250,
+    250, 250, 251, 251, 251, 251, 251, 251, 252, 252, 252, 252, 252, 252, 253, 253,
+    253, 253, 253, 253, 254, 254, 254, 254, 254, 254, 255, 255, 255, 255, 255, 255
 };
 #else
 #define L(r,g,b) LCD_RGBPACK(r,g,b)
 
 static const fb_data colorpalette[256] = {
-L(248,246,211), L(248,246,203), L(248,245,196), L(248,245,189), L(247,245,182),
-L(248,245,174), L(248,244,167), L(248,244,160), L(248,243,153), L(247,243,145),
-L(248,243,138), L(247,243,131), L(247,243,125), L(248,242,117), L(248,242,110),
-L(247,242,102), L(248,241, 94), L(247,240, 85), L(247,241, 78), L(248,240, 70),
-L(247,239, 63), L(247,240, 55), L(247,239, 47), L(247,239, 39), L(247,238, 31),
-L(247,238, 23), L(247,236, 19), L(248,232, 21), L(248,228, 22), L(248,224, 23),
-L(248,219, 25), L(249,215, 26), L(249,211, 27), L(249,206, 29), L(249,203, 30),
-L(249,199, 31), L(250,194, 33), L(250,190, 34), L(251,186, 35), L(251,181, 37),
-L(252,177, 38), L(251,172, 40), L(252,168, 41), L(252,163, 42), L(253,158, 44),
-L(253,154, 45), L(253,149, 46), L(254,145, 48), L(253,141, 50), L(253,137, 49),
-L(253,135, 49), L(252,133, 48), L(251,130, 47), L(249,129, 47), L(248,128, 46),
-L(247,125, 46), L(247,124, 44), L(246,122, 44), L(244,119, 43), L(243,118, 43),
-L(242,115, 42), L(242,113, 41), L(241,112, 40), L(240,109, 39), L(238,107, 39),
-L(237,105, 38), L(236,103, 37), L(235,101, 37), L(234, 99, 36), L(233, 97, 35),
-L(232, 95, 34), L(231, 93, 33), L(230, 91, 32), L(229, 89, 32), L(228, 86, 31),
-L(227, 85, 30), L(226, 82, 29), L(225, 80, 29), L(224, 78, 28), L(223, 76, 28),
-L(222, 74, 26), L(221, 72, 26), L(220, 69, 25), L(218, 67, 24), L(217, 64, 23),
-L(215, 60, 22), L(213, 57, 21), L(212, 54, 19), L(210, 50, 18), L(208, 47, 17),
-L(207, 44, 16), L(205, 41, 14), L(203, 37, 13), L(202, 34, 12), L(201, 30, 11),
-L(199, 27, 10), L(197, 24,  9), L(196, 21,  8), L(194, 18,  7), L(192, 14,  5),
-L(191, 11,  4), L(189,  8,  3), L(187,  5,  1), L(186,  2,  0), L(184,  0,  0),
-L(181,  0,  0), L(178,  0,  0), L(175,  0,  0), L(172,  0,  0), L(170,  0,  0),
-L(167,  0,  0), L(165,  0,  0), L(162,  0,  0), L(159,  0,  0), L(156,  0,  0),
-L(153,  0,  0), L(152,  0,  0), L(149,  0,  0), L(146,  0,  0), L(143,  0,  0),
-L(141,  0,  0), L(138,  0,  0), L(135,  0,  0), L(132,  0,  0), L(129,  0,  0),
-L(127,  0,  0), L(126,  0,  0), L(123,  0,  0), L(120,  0,  0), L(117,  0,  0),
-L(115,  0,  0), L(112,  0,  0), L(109,  0,  0), L(106,  0,  0), L(104,  0,  0),
-L(101,  0,  0), L( 98,  0,  0), L( 95,  0,  0), L( 93,  0,  0), L( 92,  0,  0),
-L( 91,  0,  0), L( 91,  0,  0), L( 90,  0,  0), L( 89,  0,  0), L( 88,  0,  0),
-L( 88,  0,  0), L( 87,  0,  0), L( 86,  0,  0), L( 85,  0,  0), L( 84,  0,  0),
-L( 84,  0,  0), L( 82,  0,  0), L( 82,  0,  0), L( 81,  0,  0), L( 80,  0,  0),
-L( 80,  0,  0), L( 79,  0,  0), L( 78,  0,  0), L( 77,  0,  0), L( 76,  0,  0),
-L( 76,  0,  0), L( 75,  0,  0), L( 74,  0,  0), L( 73,  0,  0), L( 72,  0,  0),
-L( 72,  0,  0), L( 71,  0,  0), L( 70,  0,  0), L( 69,  0,  0), L( 68,  0,  0),
-L( 68,  0,  0), L( 67,  0,  0), L( 66,  0,  0), L( 65,  0,  0), L( 65,  0,  0),
-L( 63,  0,  0), L( 62,  0,  0), L( 62,  0,  0), L( 61,  0,  0), L( 60,  0,  0),
-L( 59,  0,  0), L( 58,  0,  0), L( 58,  0,  0), L( 58,  0,  0), L( 57,  0,  0),
-L( 56,  0,  0), L( 54,  0,  0), L( 54,  0,  0), L( 53,  0,  0), L( 52,  0,  0),
-L( 52,  0,  0), L( 51,  0,  0), L( 50,  0,  0), L( 49,  0,  0), L( 48,  0,  0),
-L( 47,  0,  0), L( 47,  0,  0), L( 46,  0,  0), L( 45,  0,  0), L( 44,  0,  0),
-L( 44,  0,  0), L( 43,  0,  0), L( 42,  0,  0), L( 42,  0,  0), L( 40,  0,  0),
-L( 40,  0,  0), L( 39,  0,  0), L( 38,  0,  0), L( 38,  0,  0), L( 37,  0,  0),
-L( 36,  0,  0), L( 35,  0,  0), L( 34,  0,  0), L( 33,  0,  0), L( 32,  0,  0),
-L( 32,  0,  0), L( 31,  0,  0), L( 30,  0,  0), L( 30,  0,  0), L( 28,  0,  0),
-L( 28,  0,  0), L( 27,  0,  0), L( 26,  0,  0), L( 25,  0,  0), L( 25,  0,  0),
-L( 23,  0,  0), L( 23,  0,  0), L( 22,  0,  0), L( 21,  0,  0), L( 21,  0,  0),
-L( 20,  0,  0), L( 19,  0,  0), L( 18,  0,  0), L( 18,  0,  0), L( 16,  0,  0),
-L( 16,  0,  0), L( 15,  0,  0), L( 14,  0,  0), L( 14,  0,  0), L( 13,  0,  0),
-L( 12,  0,  0), L( 11,  0,  0), L( 10,  0,  0), L(  9,  0,  0), L(  9,  0,  0),
-L(  8,  0,  0), L(  7,  0,  0), L(  6,  0,  0), L(  5,  0,  0), L(  5,  0,  0),
-L(  4,  0,  0), L(  3,  0,  0), L(  3,  0,  0), L(  2,  0,  0), L(  1,  0,  0),
-L(  0,  0,  0)
+    L(  0,  0,  0), L(  5,  0,  0), L( 10,  0,  0), L( 15,  0,  0), L( 20,  0,  0),
+    L( 25,  0,  0), L( 30,  0,  0), L( 35,  0,  0), L( 40,  0,  0), L( 45,  0,  0),
+    L( 50,  0,  0), L( 55,  0,  0), L( 60,  0,  0), L( 65,  0,  0), L( 70,  0,  0),
+    L( 75,  0,  0), L( 80,  0,  0), L( 85,  0,  0), L( 90,  0,  0), L( 95,  0,  0),
+    L(100,  0,  0), L(105,  0,  0), L(110,  0,  0), L(115,  0,  0), L(120,  0,  0),
+    L(125,  0,  0), L(130,  0,  0), L(135,  0,  0), L(140,  0,  0), L(145,  0,  0),
+    L(150,  0,  0), L(155,  0,  0), L(160,  0,  0), L(165,  0,  0), L(170,  0,  0),
+    L(175,  0,  0), L(180,  0,  0), L(185,  0,  0), L(186,  2,  0), L(187,  5,  1),
+    L(188,  6,  2), L(189,  8,  3), L(190, 10,  4), L(191, 12,  4), L(192, 14,  5),
+    L(193, 15,  6), L(194, 17,  7), L(195, 19,  8), L(196, 21,  8), L(197, 22,  9),
+    L(198, 24, 10), L(198, 26, 10), L(199, 28, 10), L(200, 29, 11), L(201, 32, 11),
+    L(202, 34, 12), L(203, 36, 13), L(204, 39, 13), L(205, 40, 14), L(206, 42, 14),
+    L(207, 43, 15), L(208, 46, 16), L(208, 48, 17), L(209, 50, 18), L(210, 51, 18),
+    L(212, 53, 19), L(213, 55, 20), L(214, 57, 21), L(215, 59, 22), L(216, 61, 22),
+    L(217, 63, 23), L(217, 65, 24), L(218, 67, 24), L(219, 69, 25), L(220, 70, 25),
+    L(222, 72, 26), L(223, 74, 27), L(224, 76, 28), L(225, 78, 28), L(225, 80, 29),
+    L(226, 82, 29), L(227, 84, 30), L(228, 86, 31), L(228, 88, 32), L(229, 90, 32),
+    L(230, 92, 32), L(231, 94, 33), L(232, 96, 34), L(233, 98, 35), L(234, 99, 36),
+    L(235,101, 37), L(236,103, 37), L(237,105, 38), L(238,107, 39), L(240,109, 39),
+    L(240,111, 40), L(241,113, 40), L(242,114, 41), L(242,116, 42), L(243,119, 43),
+    L(245,120, 43), L(246,122, 44), L(247,124, 44), L(248,126, 46), L(248,128, 47),
+    L(249,130, 47), L(251,131, 47), L(252,133, 48), L(253,135, 49), L(253,138, 49),
+    L(253,140, 50), L(254,143, 49), L(254,145, 48), L(253,148, 47), L(253,151, 46),
+    L(253,154, 45), L(253,156, 44), L(253,158, 44), L(252,162, 42), L(252,165, 41),
+    L(252,167, 41), L(252,170, 40), L(251,173, 40), L(252,175, 38), L(252,178, 37),
+    L(251,181, 37), L(251,183, 36), L(251,186, 35), L(250,189, 34), L(250,192, 33),
+    L(250,194, 33), L(249,198, 31), L(249,200, 31), L(249,203, 30), L(249,206, 29),
+    L(249,209, 28), L(249,211, 27), L(249,214, 26), L(248,216, 25), L(248,219, 25),
+    L(248,222, 24), L(248,224, 23), L(248,227, 22), L(248,230, 21), L(248,232, 21),
+    L(247,236, 19), L(247,238, 23), L(247,239, 31), L(247,239, 45), L(247,240, 55),
+    L(248,240, 68), L(247,241, 78), L(248,241, 90), L(247,242,102), L(248,242,114),
+    L(247,243,125), L(248,243,138), L(248,243,153), L(248,244,162), L(248,245,174),
+    /* 'regular' fire doesn't exceed this value */
+    L(247,245,182), L(247,245,182), L(247,245,183), L(247,245,183), L(247,245,184),
+    L(247,245,184), L(247,245,185), L(247,245,185), L(247,245,186), L(247,245,186),
+    L(247,245,187), L(247,245,187), L(247,245,188), L(247,245,188), L(247,245,189),
+    L(247,245,189), L(248,245,190), L(248,245,190), L(248,245,191), L(248,245,191),
+    L(248,245,192), L(248,245,192), L(248,245,193), L(248,245,193), L(248,245,194),
+    L(248,245,194), L(248,245,195), L(248,245,195), L(248,245,196), L(248,245,196),
+    L(248,245,197), L(248,245,197), L(248,245,198), L(248,245,198), L(248,245,199),
+    L(248,245,199), L(248,245,200), L(248,245,200), L(248,245,201), L(248,245,201),
+    L(248,245,202), L(248,245,202), L(248,245,203), L(248,245,203), L(248,245,204),
+    L(248,245,204), L(248,245,205), L(248,245,205), L(248,246,206), L(248,246,206),
+    L(248,246,207), L(248,246,207), L(248,246,208), L(248,246,208), L(248,246,209),
+    L(248,246,209), L(248,246,210), L(248,246,210), L(248,246,211), L(248,246,211),
+    L(248,246,212), L(248,246,212), L(248,246,213), L(248,246,213), L(248,246,214),
+    L(248,246,214), L(248,246,215), L(248,246,215), L(248,246,216), L(248,246,216),
+    L(248,246,217), L(248,246,217), L(248,246,218), L(248,246,218), L(248,246,219),
+    L(248,246,219), L(248,246,220), L(248,246,220), L(248,246,221), L(248,246,221),
+    L(248,246,222), L(248,246,222), L(248,246,223), L(248,246,223), L(248,246,224),
+    L(248,246,224), L(248,246,225), L(248,246,225), L(248,246,226), L(248,246,226),
+    L(248,246,227), L(248,246,227), L(248,246,228), L(248,246,228), L(248,246,229),
+    L(248,246,229)
 };
 #endif
 
@@ -230,7 +230,7 @@ static inline void fire_generate(int mult, int flames_type, bool moving)
                         + ptr[2*LCD_WIDTH]  /* fire[y+2][x] */
                         + ptr[LCD_WIDTH+1]  /* fire[y+1][x+1] */
                         + ptr[3*LCD_WIDTH]; /* fire[y+3][x] */
-            pixel_value =  MULU16(pixel_value, mult) >> 10;
+            pixel_value = FMULU(pixel_value, mult) >> 10;
 
             cooling_value = *cool++;
             if (cooling_value <= pixel_value)
@@ -246,13 +246,14 @@ static inline void fire_generate(int mult, int flames_type, bool moving)
         break;
 
       case 1:
+        mult -= 2; 
         do
         {
             pixel_value = ptr[LCD_WIDTH-1]  /* fire[y+1][x-1] */
                         + ptr[LCD_WIDTH]    /* fire[y+1][x] */
                         + ptr[LCD_WIDTH+1]  /* fire[y+1][x+1] */
                         + ptr[2*LCD_WIDTH]; /* fire[y+2][x] */
-            pixel_value =  MULU16(pixel_value, mult) >> 10;
+            pixel_value = FMULU(pixel_value, mult) >> 10;
 
             cooling_value = *cool++;
             if (cooling_value <= pixel_value)
@@ -296,10 +297,10 @@ static inline void fire_draw(void)
     fb_data* end = rb->lcd_framebuffer+(LCD_WIDTH*LCD_HEIGHT);
     unsigned char* src = &fire[0][0];
 
-    while (dest < end)
-    {
-        *(dest++) = colorpalette[*(src++)];
-    }
+    do
+        *dest++ = colorpalette[*src++];
+    while (dest < end);
+
     rb->lcd_update();
 #endif
 }
@@ -324,36 +325,29 @@ void cleanup(void *parameter)
 
 int main(void)
 {
-    int shades, button;
-#ifdef HAVE_LCD_COLOR
-    int mult = 267;
-#else
+    int button;
     int mult = 261;
-#endif
     int flames_type=0;
     bool moving=true;
+#ifndef HAVE_LCD_COLOR
+    int shades;
+
     /* get the remainder of the plugin buffer */
     gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
-
-#ifdef HAVE_LCD_COLOR
-    shades = 256;
-#else
     shades = gray_init(rb, gbuf, gbuf_size, false, LCD_WIDTH, LCD_HEIGHT,
-                       32, 2<<8, NULL) + 1;
+                       32, 1<<8, NULL) + 1;
     if(shades <= 1)
     {
         rb->splash(HZ, true, "not enough memory");
         return PLUGIN_ERROR;
     }
+    /* switch on grayscale overlay */
+    gray_show(true);
 #endif
 
 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
     rb->cpu_boost(true);
 #endif
-#ifndef HAVE_LCD_COLOR
-    /* switch on grayscale overlay */
-    gray_show(true);
-#endif
     rb->memset(&fire[0][0], 0, sizeof(fire));
     tab_init_rand(&cooling_map[0][0], LCD_HEIGHT*LCD_WIDTH, COOL_MAX);
     while (true)
@@ -369,7 +363,7 @@ int main(void)
 #ifdef FIRE_RC_QUIT
             case FIRE_RC_QUIT :
 #endif
-            case(FIRE_QUIT):
+            case (FIRE_QUIT):
                 cleanup(NULL);
                 return PLUGIN_OK;
                 break;