Usermode/Applications/axwin2_src/WM/video.c

   1 /*
   2  * Acess GUI (AxWin) Version 2
   3  * By John Hodge (thePowersGang)
   4  */
   5 #include "common.h"
   6 #include <acess/sys.h>
   7 #include <acess/devices/terminal.h>
   8 #include <image.h>
   9
  10 // === PROTOTYPES ===
  11 void    Video_Setup(void);
  12 void    Video_Update(void);
  13 void    Video_FillRect(short X, short Y, short W, short H, uint32_t Color);
  14
  15 // === GLOBALS ===
  16
  17 // === CODE ===
  18 void Video_Setup(void)
  19 {
  20          int    tmpInt;
  21
  22         // Open terminal
  23         giTerminalFD = open(gsTerminalDevice, OPENFLAG_READ|OPENFLAG_WRITE);
  24         if( giTerminalFD == -1 )
  25         {
  26                 fprintf(stderr, "ERROR: Unable to open '%s' (%i)\n", gsTerminalDevice, _errno);
  27                 exit(-1);
  28         }
  29
  30         // Set width
  31         tmpInt = giScreenWidth;
  32         tmpInt = ioctl( giTerminalFD, TERM_IOCTL_WIDTH, &tmpInt );
  33         if(tmpInt != giScreenWidth)
  34         {
  35                 fprintf(stderr, "Warning: Selected width (%i) is invalid, clipped to %i\n",
  36                         giScreenWidth, tmpInt);
  37                 giScreenWidth = tmpInt;
  38         }
  39
  40         // Set height
  41         tmpInt = giScreenHeight;
  42         tmpInt = ioctl( giTerminalFD, TERM_IOCTL_HEIGHT, &tmpInt );
  43         if(tmpInt != giScreenHeight)
  44         {
  45                 fprintf(stderr, "Warning: Selected height (%i) is invalid, clipped to %i\n",
  46                         giScreenHeight, tmpInt);
  47                 giScreenHeight = tmpInt;
  48         }
  49
  50         // Set mode to video
  51         tmpInt = TERM_MODE_FB;
  52         ioctl( giTerminalFD, TERM_IOCTL_MODETYPE, &tmpInt );
  53
  54         // Force VT8 to be shown
  55         ioctl( giTerminalFD, TERM_IOCTL_FORCESHOW, NULL );
  56
  57         // Create local framebuffer (back buffer)
  58         gpScreenBuffer = malloc( giScreenWidth*giScreenHeight*4 );
  59         memset32( gpScreenBuffer, 0x8888FF, giScreenWidth*giScreenHeight );
  60         Video_Update();
  61 }
  62
  63 void Video_Update(void)
  64 {
  65         //seek(giTerminalFD, 0, SEEK_SET);
  66         seek(giTerminalFD, 0, 1);
  67         write(giTerminalFD, giScreenWidth*giScreenHeight*4, gpScreenBuffer);
  68 }
  69
  70 void Video_FillRect(short X, short Y, short W, short H, uint32_t Color)
  71 {
  72         uint32_t        *buf = gpScreenBuffer + Y*giScreenWidth + X;
  73
  74         _SysDebug("Video_FillRect: (X=%i, Y=%i, W=%i, H=%i, Color=%08x)",
  75                 X, Y, W, H, Color);
  76
  77         if(W < 0 || X < 0 || X >= giScreenWidth)        return ;
  78         if(X + W > giScreenWidth)       W = giScreenWidth - X;
  79
  80         if(H < 0 || Y < 0 || Y >= giScreenHeight)       return ;
  81         if(Y + H > giScreenHeight)      H = giScreenHeight - Y;
  82
  83         while( H -- )
  84         {
  85                 memset32( buf, Color, W );
  86                 buf += giScreenWidth;
  87         }
  88 }
  89
  90 void Video_DrawRect(short X, short Y, short W, short H, uint32_t Color)
  91 {
  92         Video_FillRect(X, Y, W, 1, Color);
  93         Video_FillRect(X, Y+H-1, W, 1, Color);
  94         Video_FillRect(X, Y, 1, H, Color);
  95         Video_FillRect(X+W-1, Y, 1, H, Color);
  96 }
  97
  98 /**
  99  * \brief Draw text to the screen
 100  */
 101 void Video_DrawText(short X, short Y, short W, short H, void *Font, int Point, uint32_t Color, char *Text)
 102 {
 103         // TODO!
 104 }
 105
 106 /**
 107  * \brief Draw an image to the screen
 108  * \todo Maybe have support for an offset in the image
 109  */
 110 void Video_DrawImage(short X, short Y, short W, short H, tImage *Image)
 111 {
 112          int    x, y;
 113         uint8_t *buf = (uint8_t *)(gpScreenBuffer + Y*giScreenWidth + X);
 114         uint8_t *data = Image->Data;
 115
 116         // Bounds Check
 117         if( X >= giScreenWidth )        return ;
 118         if( Y >= giScreenHeight )       return ;
 119
 120         // Wrap to image size
 121         if( W > Image->Width )  W = Image->Width;
 122         if( H > Image->Height ) H = Image->Height;
 123
 124         // Wrap to screen size
 125         if( X + W > giScreenWidth )     W = giScreenWidth - X;
 126         if( Y + H > giScreenHeight )    H = giScreenHeight - Y;
 127
 128         switch( Image->Format )
 129         {
 130         case IMGFMT_BGRA:
 131                 for( y = 0; y < H; y ++ )
 132                 {
 133                          int    r, g, b, a;     // New
 134                          int    or, og, ob;     // Original
 135                         for( x = 0; x < W; x ++ ) {
 136                                 b = data[x*4+0]; g = data[x*4+1]; r = data[x*4+2]; a = data[x*4+3];
 137                                 if( a == 0 )    continue;       // 100% transparent
 138                                 ob = buf[x*4+0]; og = buf[x*4+1]; or = buf[x*4+2];
 139                                 // Handle Alpha
 140                                 switch(a)
 141                                 {
 142                                 // Transparent: Handled above
 143                                 // Solid
 144                                 case 0xFF:      break;
 145                                 // Half
 146                                 case 0x80:
 147                                         r = (or + r) / 2;
 148                                         g = (og + g) / 2;
 149                                         b = (ob + b) / 2;
 150                                         break;
 151                                 // General
 152                                 default:
 153                                         r = (or * (255-a) + r * a) / 255;
 154                                         g = (og * (255-a) + g * a) / 255;
 155                                         b = (ob * (255-a) + b * a) / 255;
 156                                         break;
 157                                 }
 158                                 buf[x*4+0] = b; buf[x*4+1] = g; buf[x*4+2] = r;
 159                         }
 160                         data += Image->Width * 4;
 161                         buf += giScreenWidth * 4;
 162                 }
 163                 break;
 164
 165         // RGB
 166         case IMGFMT_RGB:
 167                 for( y = 0; y < H; y ++ )
 168                 {
 169                         for( x = 0; x < W; x ++ ) {
 170                                 buf[x*4+0] = data[x*3+2];       // Blue
 171                                 buf[x*4+1] = data[x*3+1];       // Green
 172                                 buf[x*4+2] = data[x*3+0];       // Red
 173                         }
 174                         data += W * 3;
 175                         buf += giScreenWidth * 4;
 176                 }
 177                 break;
 178         }
 179 }