3 * Video BIOS Extensions (Vesa) Driver
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6 #define VERSION 0x100
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10 #include <tpl_drv_video.h>
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11 #include <fs_devfs.h>
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12 #include <modules.h>
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16 // === CONSTANTS ===
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17 #define FLAG_LFB 0x1
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18 #define VESA_DEFAULT_FRAMEBUFFER (KERNEL_BASE|0xA0000)
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20 // === PROTOTYPES ===
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21 int Vesa_Install(char **Arguments);
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22 Uint64 Vesa_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
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23 Uint64 Vesa_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
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24 int Vesa_Ioctl(tVFS_Node *Node, int ID, void *Data);
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25 int Vesa_Int_SetMode(int Mode);
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26 int Vesa_Int_FindMode(tVideo_IOCtl_Mode *data);
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27 int Vesa_Int_ModeInfo(tVideo_IOCtl_Mode *data);
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28 // --- 2D Acceleration Functions --
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29 void Vesa_2D_Fill(void *Ent, Uint16 X, Uint16 Y, Uint16 W, Uint16 H, Uint32 Colour);
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30 void Vesa_2D_Blit(void *Ent, Uint16 DstX, Uint16 DstY, Uint16 SrcX, Uint16 SrcY, Uint16 W, Uint16 H);
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33 MODULE_DEFINE(0, VERSION, Vesa, Vesa_Install, NULL, "PCI", "VM8086", NULL);
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34 tDevFS_Driver gVesa_DriverStruct = {
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38 .Write = Vesa_Write,
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42 tSpinlock glVesa_Lock;
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43 tVM8086 *gpVesa_BiosState;
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44 int giVesaCurrentMode = 0;
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45 int giVesaCurrentFormat = VIDEO_BUFFMT_TEXT;
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46 int giVesaDriverId = -1;
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47 char *gpVesa_Framebuffer = (void*)VESA_DEFAULT_FRAMEBUFFER;
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48 tVesa_Mode *gVesa_Modes;
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49 int giVesaModeCount = 0;
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50 int giVesaPageCount = 0;
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51 tDrvUtil_Video_2DHandlers gVesa_2DFunctions = {
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58 int Vesa_Install(char **Arguments)
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60 tVesa_CallInfo *info;
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62 tVesa_CallModeInfo *modeinfo;
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63 tFarPtr modeinfoPtr;
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67 // Allocate Info Block
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68 gpVesa_BiosState = VM8086_Init();
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69 info = VM8086_Allocate(gpVesa_BiosState, 512, &infoPtr.seg, &infoPtr.ofs);
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70 modeinfo = VM8086_Allocate(gpVesa_BiosState, 512, &modeinfoPtr.seg, &modeinfoPtr.ofs);
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71 // Set Requested Version
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72 memcpy(info->signature, "VBE2", 4);
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74 gpVesa_BiosState->AX = 0x4F00;
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75 gpVesa_BiosState->ES = infoPtr.seg; gpVesa_BiosState->DI = infoPtr.ofs;
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77 VM8086_Int(gpVesa_BiosState, 0x10);
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78 if(gpVesa_BiosState->AX != 0x004F) {
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79 Log_Warning("VESA", "Vesa_Install - VESA/VBE Unsupported (AX = 0x%x)", gpVesa_BiosState->AX);
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80 return MODULE_ERR_NOTNEEDED;
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83 Log_Debug("VESA", "info->VideoModes = %04x:%04x", info->VideoModes.seg, info->VideoModes.ofs);
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84 modes = (Uint16 *) VM8086_GetPointer(gpVesa_BiosState, info->VideoModes.seg, info->VideoModes.ofs);
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87 for( giVesaModeCount = 0; modes[giVesaModeCount] != 0xFFFF; giVesaModeCount++ );
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88 gVesa_Modes = (tVesa_Mode *)malloc( giVesaModeCount * sizeof(tVesa_Mode) );
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91 gVesa_Modes[0].width = 80;
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92 gVesa_Modes[0].height = 25;
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93 gVesa_Modes[0].bpp = 12;
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94 gVesa_Modes[0].code = 0x3;
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95 gVesa_Modes[0].flags = 1;
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96 gVesa_Modes[0].fbSize = 80*25*2;
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97 gVesa_Modes[0].framebuffer = 0xB8000;
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99 for( i = 1; i < giVesaModeCount; i++ )
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101 gVesa_Modes[i].code = modes[i];
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103 gpVesa_BiosState->AX = 0x4F01;
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104 gpVesa_BiosState->CX = gVesa_Modes[i].code;
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105 gpVesa_BiosState->ES = modeinfoPtr.seg;
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106 gpVesa_BiosState->DI = modeinfoPtr.ofs;
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107 VM8086_Int(gpVesa_BiosState, 0x10);
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110 gVesa_Modes[i].flags = 0;
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111 if ( (modeinfo->attributes & 0x90) == 0x90 )
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113 gVesa_Modes[i].flags |= FLAG_LFB;
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114 gVesa_Modes[i].framebuffer = modeinfo->physbase;
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115 gVesa_Modes[i].fbSize = modeinfo->Xres*modeinfo->Yres*modeinfo->bpp/8;
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117 gVesa_Modes[i].framebuffer = 0;
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118 gVesa_Modes[i].fbSize = 0;
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121 gVesa_Modes[i].pitch = modeinfo->pitch;
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122 gVesa_Modes[i].width = modeinfo->Xres;
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123 gVesa_Modes[i].height = modeinfo->Yres;
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124 gVesa_Modes[i].bpp = modeinfo->bpp;
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127 Log_Log("VESA", "0x%x - %ix%ix%i",
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128 gVesa_Modes[i].code, gVesa_Modes[i].width, gVesa_Modes[i].height, gVesa_Modes[i].bpp);
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134 giVesaDriverId = DevFS_AddDevice( &gVesa_DriverStruct );
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135 if(giVesaDriverId == -1) return MODULE_ERR_MISC;
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137 return MODULE_ERR_OK;
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140 /* Read from the framebuffer
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142 Uint64 Vesa_Read(tVFS_Node *Node, Uint64 off, Uint64 len, void *buffer)
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145 Log("Vesa_Read: () - NULL\n");
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151 * \brief Write to the framebuffer
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153 Uint64 Vesa_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
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155 ENTER("pNode XOffset XLength pBuffer", Node, Offset, Length, Buffer);
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157 if(Buffer == NULL) {
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162 // Default Text mode
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163 if( giVesaCurrentMode == 0 )
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165 Uint16 *fb = (Uint16*)(KERNEL_BASE|0xB8000);
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166 tVT_Char *chars = Buffer;
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169 Length /= sizeof(tVT_Char);
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170 Offset /= sizeof(tVT_Char);
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172 if( giVesaCurrentFormat != VIDEO_BUFFMT_TEXT ) {
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173 Log_Warning("VESA", "Vesa_Write - Mode 0 is not framebuffer");
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178 if( Offset + Length > 25*80 ) {
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179 Log_Warning("VESA", "Vesa_Write - Framebuffer Overflow");
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185 LOG("fb = %p", fb);
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186 for(rem = Length; rem --; fb ++, chars++)
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188 if( chars->Ch < 0x80 )
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189 *fb = chars->Ch & 0x7F;
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193 *fb |= (chars->FGCol & 0x888) == 0x888 ? 0x8 : 0;
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194 *fb |= (chars->FGCol & 0x700) > 0x300 ? 0x4 : 0;
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195 *fb |= (chars->FGCol & 0x070) > 0x030 ? 0x2 : 0;
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196 *fb |= (chars->FGCol & 0x007) > 0x003 ? 0x1 : 0;
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197 *fb |= (chars->BGCol & 0x888) == 0x888 ? 0x80 : 0;
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198 *fb |= (chars->BGCol & 0x700) > 0x300 ? 0x40 : 0;
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199 *fb |= (chars->BGCol & 0x070) > 0x030 ? 0x20 : 0;
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200 *fb |= (chars->BGCol & 0x007) > 0x003 ? 0x10 : 0;
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201 //LOG("%08x (%03x,%03x) = %04x",
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202 // chars->Ch, chars->BGCol, chars->FGCol, *fb);
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204 Length *= sizeof(tVT_Char);
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205 LEAVE('X', Length);
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209 if( gVesa_Modes[giVesaCurrentMode].framebuffer == 0 ) {
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210 Log_Warning("VESA", "Vesa_Write - Non-LFB Modes not yet supported.");
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216 switch( giVesaCurrentFormat )
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218 case VIDEO_BUFFMT_TEXT:
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220 tVT_Char *chars = Buffer;
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221 int pitch = gVesa_Modes[giVesaCurrentMode].width;
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222 int widthInChars = gVesa_Modes[giVesaCurrentMode].width/giVT_CharWidth;
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223 int heightInChars = gVesa_Modes[giVesaCurrentMode].height/giVT_CharHeight;
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225 Uint32 *dest = (void*)gpVesa_Framebuffer;
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228 Length /= sizeof(tVT_Char);
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229 Offset /= sizeof(tVT_Char);
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231 LOG("gVesa_Modes[%i].width = %i", giVesaCurrentMode, gVesa_Modes[giVesaCurrentMode].width);
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232 x = Offset % widthInChars;
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233 y = Offset / widthInChars;
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234 LOG("(x,y) = (%i,%i) = [%i,%i]", x, y, x * giVT_CharWidth, y * giVT_CharHeight * pitch);
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235 LOG("(w,h) = (%i,%i) = [%i,%i]",
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236 (int)(Length % widthInChars),
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237 (int)(Length / widthInChars),
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238 (int)((Length % widthInChars) * giVT_CharWidth),
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239 (int)((Length / widthInChars) * giVT_CharHeight * pitch)
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243 if(y >= heightInChars) {
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248 if( Offset + Length > heightInChars*widthInChars ) {
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249 Log_Debug("VESA", "%i + %i > %i*%i (%i)",
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250 (int)Offset, (int)Length, heightInChars, widthInChars, heightInChars*widthInChars);
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251 Length = heightInChars*widthInChars - Offset;
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252 Log_Notice("VESA", "Clipping write size to %i characters", (int)Length);
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255 dest += y * giVT_CharHeight * pitch;
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256 dest += x * giVT_CharWidth;
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258 LOG("dest = %p", dest);
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260 for( i = 0; i < Length; i++ )
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264 dest + x*giVT_CharWidth, pitch,
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265 VT_Colour12to24(chars->BGCol),
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266 VT_Colour12to24(chars->FGCol)
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271 if( x >= widthInChars ) {
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274 dest += pitch*giVT_CharHeight;
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277 Length *= sizeof(tVT_Char);
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281 case VIDEO_BUFFMT_FRAMEBUFFER:
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283 Uint8 *destBuf = (Uint8*) ((Uint)gpVesa_Framebuffer + (Uint)Offset);
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285 if(gVesa_Modes[giVesaCurrentMode].fbSize < Offset+Length)
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287 Log_Warning("VESA", "Vesa_Write - Framebuffer Overflow");
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292 LOG("buffer = %p", Buffer);
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293 LOG("Updating Framebuffer (%p to %p)", destBuf, destBuf + (Uint)Length);
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296 // Copy to Frambuffer
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297 memcpy(destBuf, Buffer, Length);
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299 LOG("BGA Framebuffer updated");
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303 case VIDEO_BUFFMT_2DSTREAM:
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304 Length = DrvUtil_Video_2DStream(
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305 NULL, // Single framebuffer, so Ent is unused
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306 Buffer, Length, &gVesa_2DFunctions, sizeof(gVesa_2DFunctions)
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315 LEAVE('X', Length);
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320 * \fn int Vesa_Ioctl(vfs_node *node, int id, void *data)
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321 * \brief Handle messages to the device
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323 int Vesa_Ioctl(tVFS_Node *Node, int ID, void *Data)
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326 //Log_Debug("VESA", "Vesa_Ioctl: (Node=%p, ID=%i, Data=%p)", Node, ID, Data);
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329 case DRV_IOCTL_TYPE: return DRV_TYPE_VIDEO;
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330 case DRV_IOCTL_IDENT: memcpy("VESA", Data, 4); return 1;
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331 case DRV_IOCTL_VERSION: return VERSION;
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333 case VIDEO_IOCTL_GETSETMODE:
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334 if( !Data ) return giVesaCurrentMode;
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335 return Vesa_Int_SetMode( *(int*)Data );
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337 case VIDEO_IOCTL_FINDMODE:
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338 return Vesa_Int_FindMode((tVideo_IOCtl_Mode*)Data);
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339 case VIDEO_IOCTL_MODEINFO:
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340 return Vesa_Int_ModeInfo((tVideo_IOCtl_Mode*)Data);
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342 case VIDEO_IOCTL_SETBUFFORMAT:
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343 ret = giVesaCurrentFormat;
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345 //Log_Log("VESA", "Buffer mode to %i", *(int*)Data);
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346 giVesaCurrentFormat = *(int*)Data;
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350 case VIDEO_IOCTL_SETCURSOR: // Set cursor position
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353 case VIDEO_IOCTL_REQLFB: // Request Linear Framebuffer
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359 int Vesa_Int_SetMode(int mode)
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361 Log_Log("VESA", "Setting mode to %i", mode);
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363 // Sanity Check values
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364 if(mode < 0 || mode > giVesaModeCount) return -1;
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366 // Check for fast return
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367 if(mode == giVesaCurrentMode) return 1;
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369 LOCK( &glVesa_Lock );
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371 gpVesa_BiosState->AX = 0x4F02;
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372 gpVesa_BiosState->BX = gVesa_Modes[mode].code;
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373 if(gVesa_Modes[mode].flags & FLAG_LFB) {
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374 Log_Log("VESA", "Using LFB");
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375 gpVesa_BiosState->BX |= 0x4000; // Bit 14 - Use LFB
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379 VM8086_Int(gpVesa_BiosState, 0x10);
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382 if( (tVAddr)gpVesa_Framebuffer != VESA_DEFAULT_FRAMEBUFFER )
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383 MM_UnmapHWPages((tVAddr)gpVesa_Framebuffer, giVesaPageCount);
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384 giVesaPageCount = (gVesa_Modes[mode].fbSize + 0xFFF) >> 12;
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385 gpVesa_Framebuffer = (void*)MM_MapHWPages(gVesa_Modes[mode].framebuffer, giVesaPageCount);
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387 Log_Log("VESA", "Framebuffer (Phys) = 0x%x", gVesa_Modes[mode].framebuffer);
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388 Log_Log("VESA", "Framebuffer (Virt) = 0x%x", gpVesa_Framebuffer);
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391 giVesaCurrentMode = mode;
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393 RELEASE( &glVesa_Lock );
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398 int Vesa_Int_FindMode(tVideo_IOCtl_Mode *data)
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401 int best = -1, bestFactor = 1000;
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404 ENTER("idata->width idata->height idata->bpp", data->width, data->height, data->bpp);
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406 for(i=0;i<giVesaModeCount;i++)
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408 LOG("Mode %i (%ix%ix%i)", i, gVesa_Modes[i].width, gVesa_Modes[i].height, gVesa_Modes[i].bpp);
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410 if(gVesa_Modes[i].width == data->width
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411 && gVesa_Modes[i].height == data->height
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412 && gVesa_Modes[i].bpp == data->bpp)
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419 tmp = gVesa_Modes[i].width * gVesa_Modes[i].height * gVesa_Modes[i].bpp;
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420 tmp -= data->width * data->height * data->bpp;
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421 tmp = tmp < 0 ? -tmp : tmp;
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422 factor = tmp * 100 / (data->width * data->height * data->bpp);
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424 LOG("factor = %i", factor);
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426 if(factor < bestFactor)
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428 bestFactor = factor;
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433 data->width = gVesa_Modes[best].width;
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434 data->height = gVesa_Modes[best].height;
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435 data->bpp = gVesa_Modes[best].bpp;
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440 int Vesa_Int_ModeInfo(tVideo_IOCtl_Mode *data)
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442 if(data->id < 0 || data->id > giVesaModeCount) return -1;
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443 data->width = gVesa_Modes[data->id].width;
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444 data->height = gVesa_Modes[data->id].height;
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445 data->bpp = gVesa_Modes[data->id].bpp;
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449 // ------------------------
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450 // --- 2D Accelleration ---
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451 // ------------------------
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452 void Vesa_2D_Fill(void *Ent, Uint16 X, Uint16 Y, Uint16 W, Uint16 H, Uint32 Colour)
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454 int scrnwidth = gVesa_Modes[giVesaCurrentMode].width;
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455 Uint32 *buf = (Uint32*)gpVesa_Framebuffer + Y*scrnwidth + X;
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457 memsetd(buf, Colour, W);
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462 void Vesa_2D_Blit(void *Ent, Uint16 DstX, Uint16 DstY, Uint16 SrcX, Uint16 SrcY, Uint16 W, Uint16 H)
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464 int scrnpitch = gVesa_Modes[giVesaCurrentMode].pitch;
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465 int dst = DstY*scrnpitch + DstX;
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466 int src = SrcY*scrnpitch + SrcX;
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469 //Log("Vesa_2D_Blit: (Ent=%p, DstX=%i, DstY=%i, SrcX=%i, SrcY=%i, W=%i, H=%i)",
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470 // Ent, DstX, DstY, SrcX, SrcY, W, H);
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472 if(SrcX + W > gVesa_Modes[giVesaCurrentMode].width)
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473 W = gVesa_Modes[giVesaCurrentMode].width - SrcX;
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474 if(DstX + W > gVesa_Modes[giVesaCurrentMode].width)
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475 W = gVesa_Modes[giVesaCurrentMode].width - DstX;
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476 if(SrcY + H > gVesa_Modes[giVesaCurrentMode].height)
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477 H = gVesa_Modes[giVesaCurrentMode].height - SrcY;
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478 if(DstY + H > gVesa_Modes[giVesaCurrentMode].height)
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479 H = gVesa_Modes[giVesaCurrentMode].height - DstY;
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481 //Debug("W = %i, H = %i", W, H);
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485 Debug("Reverse scroll");
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486 dst += H*scrnpitch;
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487 src += H*scrnpitch;
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492 for( tmp = W; tmp --; ) {
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493 *(Uint32*)(gpVesa_Framebuffer + dst + tmp) = *(Uint32*)(gpVesa_Framebuffer + src + tmp);
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498 // Normal copy is OK
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499 Debug("memcpy scroll");
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501 memcpy((void*)gpVesa_Framebuffer + dst, (void*)gpVesa_Framebuffer + src, W*sizeof(Uint32));
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