vga_example.h

可配置的vga显示控制器

#define CLOCK_CENTER_X ((vga_frame_buffer->width)/2)
#define CLOCK_CENTER_Y ((vga_frame_buffer->height)/2)

#define CLOCK_RADIUS 100
#define CLOCK_RING_WIDTH 10

#define POS_12_END_X CLOCK_CENTER_X
#define POS_12_END_Y CLOCK_CENTER_Y - CLOCK_RADIUS + CLOCK_RING_WIDTH + 20

#define DISTANCE 500
#define SIDE_LENGTH 100


#define PI 3.14159265

typedef struct {
  int x, y, z;             // 3D Coordinates
  int screen_x, screen_y;  // Screen coordinates
} point_3d_struct;

char cube_tris[12][3] = 
{{0,1,2},{1,2,3},
 {4,5,6},{5,6,7},
 {0,1,4},{1,4,5},
 {2,3,6},{3,6,7},
 {0,2,4},{2,4,6},
 {1,3,5},{3,5,7}};

char clock_hand_array_70[60][2] = 
{{0, -70}, {7, -70}, {14, -69}, {21, -67},
 {28, -64}, {35, -61}, {41, -57}, {46, -53},
 {52, -47}, {56, -42}, {60, -35}, {63, -29},
 {66, -22}, {68, -15}, {69, -8}, {70, -1},
 {69, 7}, {68, 14}, {66, 21}, {63, 28},
 {60, 35}, {56, 41}, {52, 46}, {46, 52},
 {41, 56}, {35, 60}, {28, 63}, {21, 66},
 {14, 68}, {7, 69}, {0, 70}, {-8, 69},
 {-15, 68}, {-22, 66}, {-29, 63}, {-35, 60},
 {-42, 56}, {-47, 52}, {-53, 46}, {-57, 41},
 {-61, 35}, {-64, 28}, {-67, 21}, {-69, 14},
 {-70, 7}, {-70, 0}, {-70, -8}, {-69, -15},
 {-67, -22}, {-64, -29}, {-61, -35}, {-57, -42},
 {-53, -47}, {-47, -53}, {-42, -57}, {-35, -61},
 {-29, -64}, {-22, -67}, {-15, -69}, {-8, -70}};

char clock_hand_array_50[60][2] =
{{0, -50}, {5, -50}, {10, -49}, {15, -48},
 {20, -46}, {25, -44}, {29, -41}, {33, -38},
 {37, -34}, {40, -30}, {43, -25}, {45, -21},
 {47, -16}, {48, -11}, {49, -6}, {50, -1},
 {49, 5}, {48, 10}, {47, 15}, {45, 20},
 {43, 25}, {40, 29}, {37, 33}, {33, 37},
 {29, 40}, {25, 43}, {20, 45}, {15, 47},
 {10, 48}, {5, 49}, {0, 50}, {-6, 49},
 {-11, 48}, {-16, 47}, {-21, 45}, {-25, 43},
 {-30, 40}, {-34, 37}, {-38, 33}, {-41, 29},
 {-44, 25}, {-46, 20}, {-48, 15}, {-49, 10},
 {-50, 5}, {-50, 0}, {-50, -6}, {-49, -11},
 {-48, -16}, {-46, -21}, {-44, -25}, {-41, -30},
 {-38, -34}, {-34, -38}, {-30, -41}, {-25, -44},
 {-21, -46}, {-16, -48}, {-11, -49}, {-6, -50}};
 
char clock_hand_array_5[60][2] =
{{0, -5}, {0, -5}, {1, -5}, {1, -5},
 {2, -5}, {2, -5}, {2, -5}, {3, -4},
 {3, -4}, {4, -3}, {4, -3}, {4, -3},
 {4, -2}, {4, -2}, {4, -1}, {5, -1},
 {4, 0}, {4, 1}, {4, 1}, {4, 2},
 {4, 2}, {4, 2}, {3, 3}, {3, 3},
 {2, 4}, {2, 4}, {2, 4}, {1, 4},
 {1, 4}, {0, 4}, {0, 5}, {-1, 4},
 {-2, 4}, {-2, 4}, {-3, 4}, {-3, 4},
 {-3, 4}, {-4, 3}, {-4, 3}, {-5, 2},
 {-5, 2}, {-5, 2}, {-5, 1}, {-5, 1},
 {-5, 0}, {-5, 0}, {-5, -1}, {-5, -2},
 {-5, -2}, {-5, -3}, {-5, -3}, {-5, -3},
 {-4, -4}, {-4, -4}, {-3, -5}, {-3, -5},
 {-3, -5}, {-2, -5}, {-2, -5}, {-1, -5}};

  /* Clock Struct */
typedef struct {
  char sec_hand_array[60][2];
  char min_hand_array[60][2];
  char hr_hand_array[60][2];
  
  short biHeight;
  short biBitCount;
  char *bicolor_palatte;
  short *data;
} clock_struct;

void map_hand( triangle_struct* hand, int index, int hand_reach, 
               int center_x, int center_y );
               
void increment_clock(int *h, int *m, int *s);

void get_time_from_user(int *h, int *m, int *s);

void run_clock( vga_frame_buffer_struct* vga_frame_buffer );

void project(point_3d_struct* point, int dist, vga_frame_buffer_struct* vga_fb);

point_3d_struct rotate_point(point_3d_struct* point, int angle, point_3d_struct* r);

void run_rotate( vga_frame_buffer_struct* vga_frame_buffer );

int int_cos( int deg );

int int_sin( int deg );

// This is a integer SIN lookup table
// Values are (SIN(x) * 1024)
short int_sin_array[360]=
{0, 17, 35, 53, 71, 89, 107, 124, 142, 160, 
177, 195, 212, 230, 247, 265, 282, 299, 316, 333, 
350, 366, 383, 400, 416, 432, 448, 464, 480, 496, 
512, 527, 542, 557, 572, 587, 601, 616, 630, 644, 
658, 671, 685, 698, 711, 724, 736, 748, 760, 772, 
784, 795, 806, 817, 828, 838, 848, 858, 868, 877, 
886, 895, 904, 912, 920, 928, 935, 942, 949, 955, 
962, 968, 973, 979, 984, 989, 993, 997, 1001, 1005, 
1008, 1011, 1014, 1016, 1018, 1020, 1021, 1022, 1023, 1023, 
1024, 1023, 1023, 1022, 1021, 1020, 1018, 1016, 1014, 1011, 
1008, 1005, 1001, 997, 993, 989, 984, 979, 973, 968, 
962, 955, 949, 942, 935, 928, 920, 912, 904, 895, 
886, 877, 868, 858, 848, 838, 828, 817, 806, 795, 
784, 772, 760, 748, 736, 724, 711, 698, 685, 671, 
658, 644, 630, 616, 601, 587, 572, 557, 542, 527, 
512, 496, 480, 464, 448, 432, 416, 400, 383, 366, 
350, 333, 316, 299, 282, 265, 247, 230, 212, 195, 
177, 160, 142, 124, 107, 89, 71, 53, 35, 17, 
0, -18, -36, -54, -72, -90, -108, -125, -143, -161, 
-178, -196, -213, -231, -248, -266, -283, -300, -317, -334, 
-351, -367, -384, -401, -417, -433, -449, -465, -481, -497, 
-512, -528, -543, -558, -573, -588, -602, -617, -631, -645, 
-659, -672, -686, -699, -712, -725, -737, -749, -761, -773, 
-785, -796, -807, -818, -829, -839, -849, -859, -869, -878, 
-887, -896, -905, -913, -921, -929, -936, -943, -950, -956, 
-963, -969, -974, -980, -985, -990, -994, -998, -1002, -1006, 
-1009, -1012, -1015, -1017, -1019, -1021, -1022, -1023, -1024, -1024, 
-1024, -1024, -1024, -1023, -1022, -1021, -1019, -1017, -1015, -1012, 
-1009, -1006, -1002, -998, -994, -990, -985, -980, -974, -969, 
-963, -956, -950, -943, -936, -929, -921, -913, -905, -896, 
-887, -878, -869, -859, -849, -839, -829, -818, -807, -796, 
-785, -773, -761, -749, -737, -725, -712, -699, -686, -672, 
-659, -645, -631, -617, -602, -588, -573, -558, -543, -528, 
-512, -497, -481, -465, -449, -433, -417, -401, -384, -367, 
-351, -334, -317, -300, -283, -266, -248, -231, -213, -196, 
-178, -161, -143, -125, -108, -90, -72, -54, -36, -18};


// This is a integer COS lookup table
// Values are (COS(x) * 1024)
short int_cos_array[360]=
{1024, 1023, 1023, 1022, 1021, 1020, 1018, 1016, 1014, 1011, 
1008, 1005, 1001, 997, 993, 989, 984, 979, 973, 968, 
962, 955, 949, 942, 935, 928, 920, 912, 904, 895, 
886, 877, 868, 858, 848, 838, 828, 817, 806, 795, 
784, 772, 760, 748, 736, 724, 711, 698, 685, 671, 
658, 644, 630, 616, 601, 587, 572, 557, 542, 527, 
512, 496, 480, 464, 448, 432, 416, 400, 383, 366, 
350, 333, 316, 299, 282, 265, 247, 230, 212, 195, 
177, 160, 142, 124, 107, 89, 71, 53, 35, 17, 
0, -18, -36, -54, -72, -90, -108, -125, -143, -161, 
-178, -196, -213, -231, -248, -266, -283, -300, -317, -334, 
-351, -367, -384, -401, -417, -433, -449, -465, -481, -497, 
-512, -528, -543, -558, -573, -588, -602, -617, -631, -645, 
-659, -672, -686, -699, -712, -725, -737, -749, -761, -773, 
-785, -796, -807, -818, -829, -839, -849, -859, -869, -878, 
-887, -896, -905, -913, -921, -929, -936, -943, -950, -956, 
-963, -969, -974, -980, -985, -990, -994, -998, -1002, -1006, 
-1009, -1012, -1015, -1017, -1019, -1021, -1022, -1023, -1024, -1024, 
-1024, -1024, -1024, -1023, -1022, -1021, -1019, -1017, -1015, -1012, 
-1009, -1006, -1002, -998, -994, -990, -985, -980, -974, -969, 
-963, -956, -950, -943, -936, -929, -921, -913, -905, -896, 
-887, -878, -869, -859, -849, -839, -829, -818, -807, -796, 
-785, -773, -761, -749, -737, -725, -712, -699, -686, -672, 
-659, -645, -631, -617, -602, -588, -573, -558, -543, -528, 
-512, -497, -481, -465, -449, -433, -417, -401, -384, -367, 
-351, -334, -317, -300, -283, -266, -248, -231, -213, -196, 
-178, -161, -143, -125, -108, -90, -72, -54, -36, -18, 
-1, 17, 35, 53, 71, 89, 107, 124, 142, 160, 
177, 195, 212, 230, 247, 265, 282, 299, 316, 333, 
350, 366, 383, 400, 416, 432, 448, 464, 480, 496, 
512, 527, 542, 557, 572, 587, 601, 616, 630, 644, 
658, 671, 685, 698, 711, 724, 736, 748, 760, 772, 
784, 795, 806, 817, 828, 838, 848, 858, 868, 877, 
886, 895, 904, 912, 920, 928, 935, 942, 949, 955, 
962, 968, 973, 979, 984, 989, 993, 997, 1001, 1005, 
1008, 1011, 1014, 1016, 1018, 1020, 1021, 1022, 1023, 1023};