code.delx.au - refind/blob - libeg/screen.c

   1 /*
   2  * libeg/screen.c
   3  * Screen handling functions
   4  *
   5  * Copyright (c) 2006 Christoph Pfisterer
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are
  10  * met:
  11  *
  12  *  * Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  *  * Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  *  * Neither the name of Christoph Pfisterer nor the names of the
  21  *    contributors may be used to endorse or promote products derived
  22  *    from this software without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  */
  36 /*
  37  * Modifications copyright (c) 2012 Roderick W. Smith
  38  *
  39  * Modifications distributed under the terms of the GNU General Public
  40  * License (GPL) version 3 (GPLv3), a copy of which must be distributed
  41  * with this source code or binaries made from it.
  42  *
  43  */
  44
  45 #include "libegint.h"
  46 #include "../refind/screen.h"
  47 #include "../refind/lib.h"
  48 #include "../include/refit_call_wrapper.h"
  49
  50 #include <efiUgaDraw.h>
  51 #include <efiConsoleControl.h>
  52
  53 #ifndef __MAKEWITH_GNUEFI
  54 #define LibLocateProtocol EfiLibLocateProtocol
  55 #endif
  56
  57 // Console defines and variables
  58
  59 static EFI_GUID ConsoleControlProtocolGuid = EFI_CONSOLE_CONTROL_PROTOCOL_GUID;
  60 static EFI_CONSOLE_CONTROL_PROTOCOL *ConsoleControl = NULL;
  61
  62 static EFI_GUID UgaDrawProtocolGuid = EFI_UGA_DRAW_PROTOCOL_GUID;
  63 static EFI_UGA_DRAW_PROTOCOL *UgaDraw = NULL;
  64
  65 static EFI_GUID GraphicsOutputProtocolGuid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
  66 static EFI_GRAPHICS_OUTPUT_PROTOCOL *GraphicsOutput = NULL;
  67
  68 static BOOLEAN egHasGraphics = FALSE;
  69 static UINTN egScreenWidth  = 800;
  70 static UINTN egScreenHeight = 600;
  71
  72 //
  73 // Screen handling
  74 //
  75
  76 // Make the necessary system calls to identify the current graphics mode.
  77 // Stores the results in the file-global variables egScreenWidth,
  78 // egScreenHeight, and egHasGraphics. The first two of these will be
  79 // unchanged if neither GraphicsOutput nor UgaDraw is a valid pointer.
  80 static VOID egDetermineScreenSize(VOID) {
  81     EFI_STATUS Status = EFI_SUCCESS;
  82     UINT32 UGAWidth, UGAHeight, UGADepth, UGARefreshRate;
  83
  84     // get screen size
  85     egHasGraphics = FALSE;
  86     if (GraphicsOutput != NULL) {
  87         egScreenWidth = GraphicsOutput->Mode->Info->HorizontalResolution;
  88         egScreenHeight = GraphicsOutput->Mode->Info->VerticalResolution;
  89         egHasGraphics = TRUE;
  90     } else if (UgaDraw != NULL) {
  91         Status = refit_call5_wrapper(UgaDraw->GetMode, UgaDraw, &UGAWidth, &UGAHeight, &UGADepth, &UGARefreshRate);
  92         if (EFI_ERROR(Status)) {
  93             UgaDraw = NULL;   // graphics not available
  94         } else {
  95             egScreenWidth  = UGAWidth;
  96             egScreenHeight = UGAHeight;
  97             egHasGraphics = TRUE;
  98         }
  99     }
 100 } // static VOID egDetermineScreenSize()
 101
 102 VOID egGetScreenSize(OUT UINTN *ScreenWidth, OUT UINTN *ScreenHeight)
 103 {
 104     egDetermineScreenSize();
 105
 106     if (ScreenWidth != NULL)
 107         *ScreenWidth = egScreenWidth;
 108     if (ScreenHeight != NULL)
 109         *ScreenHeight = egScreenHeight;
 110 }
 111
 112 VOID egInitScreen(VOID)
 113 {
 114     EFI_STATUS Status = EFI_SUCCESS;
 115
 116     // get protocols
 117     Status = LibLocateProtocol(&ConsoleControlProtocolGuid, (VOID **) &ConsoleControl);
 118     if (EFI_ERROR(Status))
 119         ConsoleControl = NULL;
 120
 121     Status = LibLocateProtocol(&UgaDrawProtocolGuid, (VOID **) &UgaDraw);
 122     if (EFI_ERROR(Status))
 123         UgaDraw = NULL;
 124
 125     Status = LibLocateProtocol(&GraphicsOutputProtocolGuid, (VOID **) &GraphicsOutput);
 126     if (EFI_ERROR(Status))
 127         GraphicsOutput = NULL;
 128
 129     egDetermineScreenSize();
 130 }
 131
 132 // Convert a graphics mode (in *ModeWidth) to a width and height (returned in
 133 // *ModeWidth and *Height, respectively).
 134 // Returns TRUE if successful, FALSE if not (invalid mode, typically)
 135 BOOLEAN egGetResFromMode(UINTN *ModeWidth, UINTN *Height) {
 136    UINTN                                 Size;
 137    EFI_STATUS                            Status;
 138    EFI_GRAPHICS_OUTPUT_MODE_INFORMATION  *Info = NULL;
 139
 140    if ((ModeWidth != NULL) && (Height != NULL)) {
 141       Status = refit_call4_wrapper(GraphicsOutput->QueryMode, GraphicsOutput, *ModeWidth, &Size, &Info);
 142       if ((Status == EFI_SUCCESS) && (Info != NULL)) {
 143          *ModeWidth = Info->HorizontalResolution;
 144          *Height = Info->VerticalResolution;
 145          return TRUE;
 146       }
 147    }
 148    return FALSE;
 149 } // BOOLEAN egGetResFromMode()
 150
 151 // Sets the screen resolution to the specified value, if possible. If *ScreenHeight
 152 // is 0 and GOP mode is detected, assume that *ScreenWidth contains a GOP mode
 153 // number rather than a horizontal resolution. If the specified resolution is not
 154 // valid, displays a warning with the valid modes on GOP (UEFI) systems, or silently
 155 // fails on UGA (EFI 1.x) systems. Note that this function attempts to set ANY screen
 156 // resolution, even 0x0 or ridiculously large values.
 157 // Upon success, returns actual screen resolution in *ScreenWidth and *ScreenHeight.
 158 // These values are unchanged upon failure.
 159 // Returns TRUE if successful, FALSE if not.
 160 BOOLEAN egSetScreenSize(IN OUT UINTN *ScreenWidth, IN OUT UINTN *ScreenHeight) {
 161    EFI_STATUS                            Status = EFI_SUCCESS;
 162    EFI_GRAPHICS_OUTPUT_MODE_INFORMATION  *Info;
 163    UINTN                                 Size;
 164    UINT32                                ModeNum = 0;
 165    UINT32                                UGAWidth, UGAHeight, UGADepth, UGARefreshRate;
 166    BOOLEAN                               ModeSet = FALSE;
 167
 168    if ((ScreenWidth == NULL) || (ScreenHeight == NULL))
 169       return FALSE;
 170
 171    if (GraphicsOutput != NULL) { // GOP mode (UEFI)
 172       if (*ScreenHeight == 0) { // User specified a mode number (stored in *ScreenWidth); use it directly
 173          ModeNum = (UINT32) *ScreenWidth;
 174          if (egGetResFromMode(ScreenWidth, ScreenHeight) &&
 175              (refit_call2_wrapper(GraphicsOutput->SetMode, GraphicsOutput, ModeNum) == EFI_SUCCESS)) {
 176             ModeSet = TRUE;
 177          }
 178
 179       // User specified width & height; must find mode...
 180       } else {
 181          // Do a loop through the modes to see if the specified one is available;
 182          // and if so, switch to it....
 183          do {
 184             Status = refit_call4_wrapper(GraphicsOutput->QueryMode, GraphicsOutput, ModeNum, &Size, &Info);
 185             if ((Status == EFI_SUCCESS) && (Size >= sizeof(*Info) && (Info != NULL)) &&
 186                 (Info->HorizontalResolution == *ScreenWidth) && (Info->VerticalResolution == *ScreenHeight)) {
 187                Status = refit_call2_wrapper(GraphicsOutput->SetMode, GraphicsOutput, ModeNum);
 188                ModeSet = (Status == EFI_SUCCESS);
 189             } // if
 190          } while ((++ModeNum < GraphicsOutput->Mode->MaxMode) && !ModeSet);
 191       } // if/else
 192
 193       if (ModeSet) {
 194          egScreenWidth = *ScreenWidth;
 195          egScreenHeight = *ScreenHeight;
 196       } else {// If unsuccessful, display an error message for the user....
 197          SwitchToText(FALSE);
 198          Print(L"Error setting graphics mode %d x %d; using default mode!\nAvailable modes are:\n", *ScreenWidth, *ScreenHeight);
 199          ModeNum = 0;
 200          do {
 201             Status = refit_call4_wrapper(GraphicsOutput->QueryMode, GraphicsOutput, ModeNum, &Size, &Info);
 202             if ((Status == EFI_SUCCESS) && (Info != NULL)) {
 203                Print(L"Mode %d: %d x %d\n", ModeNum, Info->HorizontalResolution, Info->VerticalResolution);
 204             } // else
 205          } while (++ModeNum < GraphicsOutput->Mode->MaxMode);
 206          PauseForKey();
 207          SwitchToGraphics();
 208       } // if GOP mode (UEFI)
 209
 210    } else if (UgaDraw != NULL) { // UGA mode (EFI 1.x)
 211       // Try to use current color depth & refresh rate for new mode. Maybe not the best choice
 212       // in all cases, but I don't know how to probe for alternatives....
 213       Status = refit_call5_wrapper(UgaDraw->GetMode, UgaDraw, &UGAWidth, &UGAHeight, &UGADepth, &UGARefreshRate);
 214       Status = refit_call5_wrapper(UgaDraw->SetMode, UgaDraw, *ScreenWidth, *ScreenHeight, UGADepth, UGARefreshRate);
 215       if (Status == EFI_SUCCESS) {
 216          egScreenWidth = *ScreenWidth;
 217          egScreenHeight = *ScreenHeight;
 218          ModeSet = TRUE;
 219       } else {
 220          // TODO: Find a list of supported modes and display it.
 221          // NOTE: Below doesn't actually appear unless we explicitly switch to text mode.
 222          // This is just a placeholder until something better can be done....
 223          Print(L"Error setting graphics mode %d x %d; unsupported mode!\n");
 224       } // if/else
 225    } // if/else if UGA mode (EFI 1.x)
 226    return (ModeSet);
 227 } // BOOLEAN egSetScreenSize()
 228
 229 // Set a text mode.
 230 // Returns TRUE if the mode actually changed, FALSE otherwise.
 231 // Note that a FALSE return value can mean either an error or no change
 232 // necessary.
 233 BOOLEAN egSetTextMode(UINT32 RequestedMode) {
 234    UINTN         i = 0, Width, Height;
 235    EFI_STATUS    Status;
 236    BOOLEAN       ChangedIt = FALSE;
 237
 238    if ((RequestedMode != DONT_CHANGE_TEXT_MODE) && (RequestedMode != ST->ConOut->Mode->Mode)) {
 239       Status = refit_call2_wrapper(ST->ConOut->SetMode, ST->ConOut, RequestedMode);
 240       if (Status == EFI_SUCCESS) {
 241          ChangedIt = TRUE;
 242       } else {
 243          SwitchToText(FALSE);
 244          Print(L"\nError setting text mode %d; available modes are:\n", RequestedMode);
 245          do {
 246             Status = refit_call4_wrapper(ST->ConOut->QueryMode, ST->ConOut, i, &Width, &Height);
 247             if (Status == EFI_SUCCESS)
 248                Print(L"Mode %d: %d x %d\n", i, Width, Height);
 249          } while (++i < ST->ConOut->Mode->MaxMode);
 250          Print(L"Mode %d: Use default mode\n", DONT_CHANGE_TEXT_MODE);
 251
 252          PauseForKey();
 253          SwitchToGraphics();
 254       } // if/else successful change
 255    } // if need to change mode
 256    return ChangedIt;
 257 } // BOOLEAN egSetTextMode()
 258
 259 CHAR16 * egScreenDescription(VOID)
 260 {
 261     CHAR16 *GraphicsInfo, *TextInfo = NULL;
 262
 263     GraphicsInfo = AllocateZeroPool(256 * sizeof(CHAR16));
 264     if (GraphicsInfo == NULL)
 265        return L"memory allocation error";
 266
 267     if (egHasGraphics) {
 268         if (GraphicsOutput != NULL) {
 269             SPrint(GraphicsInfo, 255, L"Graphics Output (UEFI), %dx%d", egScreenWidth, egScreenHeight);
 270         } else if (UgaDraw != NULL) {
 271             GraphicsInfo = AllocateZeroPool(256 * sizeof(CHAR16));
 272             SPrint(GraphicsInfo, 255, L"UGA Draw (EFI 1.10), %dx%d", egScreenWidth, egScreenHeight);
 273         } else {
 274             MyFreePool(GraphicsInfo);
 275             MyFreePool(TextInfo);
 276             return L"Internal Error";
 277         }
 278         if (!AllowGraphicsMode) { // graphics-capable HW, but in text mode
 279            TextInfo = AllocateZeroPool(256 * sizeof(CHAR16));
 280            SPrint(TextInfo, 255, L"(in %dx%d text mode)", ConWidth, ConHeight);
 281            MergeStrings(&GraphicsInfo, TextInfo, L' ');
 282         }
 283     } else {
 284         SPrint(GraphicsInfo, 255, L"Text-foo console, %dx%d", ConWidth, ConHeight);
 285     }
 286     MyFreePool(TextInfo);
 287     return GraphicsInfo;
 288 }
 289
 290 BOOLEAN egHasGraphicsMode(VOID)
 291 {
 292     return egHasGraphics;
 293 }
 294
 295 BOOLEAN egIsGraphicsModeEnabled(VOID)
 296 {
 297     EFI_CONSOLE_CONTROL_SCREEN_MODE CurrentMode;
 298
 299     if (ConsoleControl != NULL) {
 300         refit_call4_wrapper(ConsoleControl->GetMode, ConsoleControl, &CurrentMode, NULL, NULL);
 301         return (CurrentMode == EfiConsoleControlScreenGraphics) ? TRUE : FALSE;
 302     }
 303
 304     return FALSE;
 305 }
 306
 307 VOID egSetGraphicsModeEnabled(IN BOOLEAN Enable)
 308 {
 309     EFI_CONSOLE_CONTROL_SCREEN_MODE CurrentMode;
 310     EFI_CONSOLE_CONTROL_SCREEN_MODE NewMode;
 311
 312     if (ConsoleControl != NULL) {
 313         refit_call4_wrapper(ConsoleControl->GetMode, ConsoleControl, &CurrentMode, NULL, NULL);
 314
 315         NewMode = Enable ? EfiConsoleControlScreenGraphics
 316                          : EfiConsoleControlScreenText;
 317         if (CurrentMode != NewMode)
 318            refit_call2_wrapper(ConsoleControl->SetMode, ConsoleControl, NewMode);
 319     }
 320 }
 321
 322 //
 323 // Drawing to the screen
 324 //
 325
 326 VOID egClearScreen(IN EG_PIXEL *Color)
 327 {
 328     EFI_UGA_PIXEL FillColor;
 329
 330     if (!egHasGraphics)
 331         return;
 332
 333     if (Color != NULL) {
 334        FillColor.Red   = Color->r;
 335        FillColor.Green = Color->g;
 336        FillColor.Blue  = Color->b;
 337     } else {
 338        FillColor.Red   = 0x0;
 339        FillColor.Green = 0x0;
 340        FillColor.Blue  = 0x0;
 341     }
 342     FillColor.Reserved = 0;
 343
 344     if (GraphicsOutput != NULL) {
 345         // EFI_GRAPHICS_OUTPUT_BLT_PIXEL and EFI_UGA_PIXEL have the same
 346         // layout, and the header from TianoCore actually defines them
 347         // to be the same type.
 348         refit_call10_wrapper(GraphicsOutput->Blt, GraphicsOutput, (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *)&FillColor, EfiBltVideoFill,
 349                              0, 0, 0, 0, egScreenWidth, egScreenHeight, 0);
 350     } else if (UgaDraw != NULL) {
 351         refit_call10_wrapper(UgaDraw->Blt, UgaDraw, &FillColor, EfiUgaVideoFill, 0, 0, 0, 0, egScreenWidth, egScreenHeight, 0);
 352     }
 353 }
 354
 355 VOID egDrawImage(IN EG_IMAGE *Image, IN UINTN ScreenPosX, IN UINTN ScreenPosY)
 356 {
 357     EG_IMAGE *CompImage = NULL;
 358
 359     // NOTE: Weird seemingly redundant tests because some placement code can "wrap around" and
 360     // send "negative" values, which of course become very large unsigned ints that can then
 361     // wrap around AGAIN if values are added to them.....
 362     if (!egHasGraphics || ((ScreenPosX + Image->Width) > egScreenWidth) || ((ScreenPosY + Image->Height) > egScreenHeight) ||
 363         (ScreenPosX > egScreenWidth) || (ScreenPosY > egScreenHeight))
 364         return;
 365
 366     if ((GlobalConfig.ScreenBackground == NULL) || ((Image->Width == egScreenWidth) && (Image->Height == egScreenHeight))) {
 367        CompImage = Image;
 368     } else if (GlobalConfig.ScreenBackground == Image) {
 369        CompImage = GlobalConfig.ScreenBackground;
 370     } else {
 371        CompImage = egCropImage(GlobalConfig.ScreenBackground, ScreenPosX, ScreenPosY, Image->Width, Image->Height);
 372        if (CompImage == NULL) {
 373           Print(L"Error! Can't crop image in egDrawImage()!\n");
 374           return;
 375        }
 376        egComposeImage(CompImage, Image, 0, 0);
 377     }
 378
 379     if (GraphicsOutput != NULL) {
 380        refit_call10_wrapper(GraphicsOutput->Blt, GraphicsOutput, (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *)CompImage->PixelData,
 381                             EfiBltBufferToVideo, 0, 0, ScreenPosX, ScreenPosY, CompImage->Width, CompImage->Height, 0);
 382     } else if (UgaDraw != NULL) {
 383        refit_call10_wrapper(UgaDraw->Blt, UgaDraw, (EFI_UGA_PIXEL *)CompImage->PixelData, EfiUgaBltBufferToVideo,
 384                             0, 0, ScreenPosX, ScreenPosY, CompImage->Width, CompImage->Height, 0);
 385     }
 386     if ((CompImage != GlobalConfig.ScreenBackground) && (CompImage != Image))
 387        egFreeImage(CompImage);
 388 } /* VOID egDrawImage() */
 389
 390 // Display an unselected icon on the screen, so that the background image shows
 391 // through the transparency areas. The BadgeImage may be NULL, in which case
 392 // it's not composited in.
 393 VOID egDrawImageWithTransparency(EG_IMAGE *Image, EG_IMAGE *BadgeImage, UINTN XPos, UINTN YPos, UINTN Width, UINTN Height) {
 394    EG_IMAGE *Background;
 395
 396    Background = egCropImage(GlobalConfig.ScreenBackground, XPos, YPos, Width, Height);
 397    if (Background != NULL) {
 398       BltImageCompositeBadge(Background, Image, BadgeImage, XPos, YPos);
 399       egFreeImage(Background);
 400    }
 401 } // VOID DrawImageWithTransparency()
 402
 403 VOID egDrawImageArea(IN EG_IMAGE *Image,
 404                      IN UINTN AreaPosX, IN UINTN AreaPosY,
 405                      IN UINTN AreaWidth, IN UINTN AreaHeight,
 406                      IN UINTN ScreenPosX, IN UINTN ScreenPosY)
 407 {
 408     if (!egHasGraphics)
 409         return;
 410
 411     egRestrictImageArea(Image, AreaPosX, AreaPosY, &AreaWidth, &AreaHeight);
 412     if (AreaWidth == 0)
 413         return;
 414
 415     if (GraphicsOutput != NULL) {
 416         refit_call10_wrapper(GraphicsOutput->Blt, GraphicsOutput, (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *)Image->PixelData,
 417                              EfiBltBufferToVideo, AreaPosX, AreaPosY, ScreenPosX, ScreenPosY, AreaWidth, AreaHeight,
 418                              Image->Width * 4);
 419     } else if (UgaDraw != NULL) {
 420         refit_call10_wrapper(UgaDraw->Blt, UgaDraw, (EFI_UGA_PIXEL *)Image->PixelData, EfiUgaBltBufferToVideo,
 421                              AreaPosX, AreaPosY, ScreenPosX, ScreenPosY, AreaWidth, AreaHeight, Image->Width * 4);
 422     }
 423 }
 424
 425 // Display a message in the center of the screen, surrounded by a box of the
 426 // specified color. For the moment, uses graphics calls only. (It still works
 427 // in text mode on GOP/UEFI systems, but not on UGA/EFI 1.x systems.)
 428 VOID egDisplayMessage(IN CHAR16 *Text, EG_PIXEL *BGColor) {
 429    UINTN BoxWidth, BoxHeight;
 430    EG_IMAGE *Box;
 431
 432    if ((Text != NULL) && (BGColor != NULL)) {
 433       egMeasureText(Text, &BoxWidth, &BoxHeight);
 434       BoxWidth += 14;
 435       BoxHeight *= 2;
 436       if (BoxWidth > egScreenWidth)
 437          BoxWidth = egScreenWidth;
 438       Box = egCreateFilledImage(BoxWidth, BoxHeight, FALSE, BGColor);
 439       egRenderText(Text, Box, 7, BoxHeight / 4, (BGColor->r + BGColor->g + BGColor->b) / 3);
 440       egDrawImage(Box, (egScreenWidth - BoxWidth) / 2, (egScreenHeight - BoxHeight) / 2);
 441    } // if non-NULL inputs
 442 } // VOID egDisplayMessage()
 443
 444 // Copy the current contents of the display into an EG_IMAGE....
 445 // Returns pointer if successful, NULL if not.
 446 EG_IMAGE * egCopyScreen(VOID) {
 447    EG_IMAGE *Image = NULL;
 448
 449    if (!egHasGraphics)
 450       return NULL;
 451
 452    // allocate a buffer for the whole screen
 453    Image = egCreateImage(egScreenWidth, egScreenHeight, FALSE);
 454    if (Image == NULL) {
 455       return NULL;
 456    }
 457
 458    // get full screen image
 459    if (GraphicsOutput != NULL) {
 460       refit_call10_wrapper(GraphicsOutput->Blt, GraphicsOutput, (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *)Image->PixelData,
 461                            EfiBltVideoToBltBuffer, 0, 0, 0, 0, Image->Width, Image->Height, 0);
 462    } else if (UgaDraw != NULL) {
 463       refit_call10_wrapper(UgaDraw->Blt, UgaDraw, (EFI_UGA_PIXEL *)Image->PixelData, EfiUgaVideoToBltBuffer,
 464                            0, 0, 0, 0, Image->Width, Image->Height, 0);
 465    }
 466    return Image;
 467 } // EG_IMAGE * egCopyScreen()
 468
 469 //
 470 // Make a screenshot
 471 //
 472
 473 VOID egScreenShot(VOID)
 474 {
 475     EFI_STATUS      Status;
 476     EG_IMAGE        *Image;
 477     UINT8           *FileData;
 478     UINTN           FileDataLength;
 479     UINTN           Index;
 480
 481     Image = egCopyScreen();
 482     if (Image == NULL) {
 483        Print(L"Error: Unable to take screen shot\n");
 484        goto bailout_wait;
 485     }
 486
 487     // encode as BMP
 488     egEncodeBMP(Image, &FileData, &FileDataLength);
 489     egFreeImage(Image);
 490     if (FileData == NULL) {
 491         Print(L"Error egEncodeBMP returned NULL\n");
 492         goto bailout_wait;
 493     }
 494
 495     // save to file on the ESP
 496     Status = egSaveFile(NULL, L"screenshot.bmp", FileData, FileDataLength);
 497     FreePool(FileData);
 498     if (EFI_ERROR(Status)) {
 499         Print(L"Error egSaveFile: %x\n", Status);
 500         goto bailout_wait;
 501     }
 502
 503     return;
 504
 505     // DEBUG: switch to text mode
 506 bailout_wait:
 507     egSetGraphicsModeEnabled(FALSE);
 508     refit_call3_wrapper(BS->WaitForEvent, 1, &ST->ConIn->WaitForKey, &Index);
 509 }
 510
 511 /* EOF */