2 * Acess2 GUI (AxWin) Version 3
3 * - By John Hodge (thePowersGang)
10 #include <acess/devices/terminal.h>
12 #include "resources/cursor.h"
19 extern int giTerminalFD_Input;
22 void Video_Setup(void);
23 void Video_SetCursorPos(short X, short Y);
24 void Video_Update(void);
25 void Video_FillRect(int X, int Y, int W, int H, uint32_t Color);
30 uint32_t *gpScreenBuffer;
31 int giVideo_FirstDirtyLine;
32 int giVideo_LastDirtyLine;
35 void Video_Setup(void)
41 giTerminalFD = _SysOpen(gsTerminalDevice, OPENFLAG_READ|OPENFLAG_WRITE);
42 if( giTerminalFD == -1 )
44 fprintf(stderr, "ERROR: Unable to open '%s' (%i)\n", gsTerminalDevice, _errno);
49 giTerminalFD_Input = 0;
50 // Check that the console is a VT
51 // - _SysIOCtl(..., 0, NULL) returns the type, which should be 2
52 tmpInt = _SysIOCtl(1, 0, NULL);
55 fprintf(stderr, "stdout is not an Acess VT, can't start (2 exp, %i got)\n", tmpInt);
56 _SysDebug("stdout is not an Acess VT, can't start");
62 tmpInt = TERM_MODE_FB;
63 _SysIOCtl( giTerminalFD, TERM_IOCTL_MODETYPE, &tmpInt );
66 giScreenWidth = _SysIOCtl( giTerminalFD, TERM_IOCTL_WIDTH, NULL );
67 giScreenHeight = _SysIOCtl( giTerminalFD, TERM_IOCTL_HEIGHT, NULL );
69 giVideo_LastDirtyLine = giScreenHeight;
71 // Force VT to be shown
72 _SysIOCtl( giTerminalFD, TERM_IOCTL_FORCESHOW, NULL );
74 // Create local framebuffer (back buffer)
75 gpScreenBuffer = malloc( giScreenWidth*giScreenHeight*4 );
77 // Set cursor position and bitmap
78 _SysIOCtl(giTerminalFD, TERM_IOCTL_SETCURSORBITMAP, &cCursorBitmap);
79 Video_SetCursorPos( giScreenWidth/2, giScreenHeight/2 );
82 void Video_Update(void)
84 int ofs = giVideo_FirstDirtyLine*giScreenWidth;
85 int size = (giVideo_LastDirtyLine-giVideo_FirstDirtyLine)*giScreenWidth;
87 if( giVideo_LastDirtyLine == 0 ) return;
89 _SysDebug("Video_Update - Updating lines %i to %i (0x%x+0x%x px)",
90 giVideo_FirstDirtyLine, giVideo_LastDirtyLine, ofs, size);
91 _SysSeek(giTerminalFD, ofs*4, SEEK_SET);
92 _SysDebug("Video_Update - Sending FD %i %p 0x%x", giTerminalFD, gpScreenBuffer+ofs, size*4);
93 _SysWrite(giTerminalFD, gpScreenBuffer+ofs, size*4);
94 _SysDebug("Video_Update - Done");
95 giVideo_FirstDirtyLine = 0;
96 giVideo_LastDirtyLine = 0;
99 void Video_SetCursorPos(short X, short Y)
105 pos.x = giVideo_CursorX = X;
106 pos.y = giVideo_CursorY = Y;
107 _SysIOCtl(giTerminalFD, TERM_IOCTL_GETSETCURSOR, &pos);
110 void Video_FillRect(int X, int Y, int W, int H, uint32_t Colour)
115 if(X < 0 || Y < 0) return;
116 if(W >= giScreenWidth) return;
117 if(H >= giScreenHeight) return;
118 if(X + W >= giScreenWidth) W = giScreenWidth - W;
119 if(Y + H >= giScreenHeight) W = giScreenHeight - H;
121 dest = gpScreenBuffer + Y * giScreenWidth + X;
124 for( i = W; i --; dest ++ ) *dest = Colour;
125 dest += giScreenWidth - W;
130 * \brief Blit an entire buffer to the screen
131 * \note Assumes Pitch = 4*W
133 void Video_Blit(uint32_t *Source, short DstX, short DstY, short W, short H)
138 if( DstX >= giScreenWidth) return ;
139 if( DstY >= giScreenHeight) return ;
140 // Drawing oob to left/top, clip
151 if( drawW < 0 ) return ;
152 // Drawing oob to the right, clip
153 if( DstX + drawW > giScreenWidth ) {
155 drawW = giScreenWidth - DstX;
157 if( DstY + H > giScreenHeight )
158 H = giScreenHeight - DstY;
160 if( W <= 0 || H <= 0 ) return;
162 if( DstY < giVideo_FirstDirtyLine )
163 giVideo_FirstDirtyLine = DstY;
164 if( DstY + H > giVideo_LastDirtyLine )
165 giVideo_LastDirtyLine = DstY + H;
167 buf = gpScreenBuffer + DstY*giScreenWidth + DstX;
168 if(drawW != giScreenWidth || W != giScreenWidth)
172 memcpy(buf, Source, drawW*4);
174 buf += giScreenWidth;
179 // Only valid if copying full scanlines on both ends
180 memcpy(buf, Source, giScreenWidth*H*4);
184 tColour Video_AlphaBlend(tColour _orig, tColour _new, uint8_t _alpha)
186 uint16_t ao,ro,go,bo;
187 uint16_t an,rn,gn,bn;
188 if( _alpha == 0 ) return _orig;
189 if( _alpha == 255 ) return _new;
191 ao = (_orig >> 24) & 0xFF;
192 ro = (_orig >> 16) & 0xFF;
193 go = (_orig >> 8) & 0xFF;
194 bo = (_orig >> 0) & 0xFF;
196 an = (_new >> 24) & 0xFF;
197 rn = (_new >> 16) & 0xFF;
198 gn = (_new >> 8) & 0xFF;
199 bn = (_new >> 0) & 0xFF;
201 if( _alpha == 0x80 ) {
208 ao = ao*(255-_alpha) + an*_alpha;
209 ro = ro*(255-_alpha) + rn*_alpha;
210 go = go*(255-_alpha) + gn*_alpha;
211 bo = bo*(255-_alpha) + bn*_alpha;
218 return (ao << 24) | (ro << 16) | (go << 8) | bo;