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1 | /** @file\r | |
2 | Internal include file of the VGA Class Driver.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials \r | |
6 | are licensed and made available under the terms and conditions of the BSD License \r | |
7 | which accompanies this distribution. The full text of the license may be found at \r | |
8 | http://opensource.org/licenses/bsd-license.php \r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | \r | |
16 | #ifndef _VGA_CLASS_H__\r | |
17 | #define _VGA_CLASS_H__\r | |
18 | \r | |
19 | #include <FrameworkDxe.h>\r | |
20 | \r | |
21 | #include <Protocol/SimpleTextOut.h>\r | |
22 | #include <Protocol/PciIo.h>\r | |
23 | #include <Protocol/VgaMiniPort.h>\r | |
24 | #include <Protocol/DevicePath.h>\r | |
25 | \r | |
26 | #include <Library/DebugLib.h>\r | |
27 | #include <Library/UefiDriverEntryPoint.h>\r | |
28 | #include <Library/UefiLib.h>\r | |
29 | #include <Library/MemoryAllocationLib.h>\r | |
30 | #include <Library/UefiBootServicesTableLib.h>\r | |
31 | #include <Library/ReportStatusCodeLib.h>\r | |
32 | \r | |
33 | #include <IndustryStandard/Pci.h>\r | |
34 | \r | |
35 | //\r | |
36 | // Global Variables\r | |
37 | //\r | |
38 | extern EFI_DRIVER_BINDING_PROTOCOL gVgaClassDriverBinding;\r | |
39 | extern EFI_COMPONENT_NAME_PROTOCOL gVgaClassComponentName;\r | |
40 | extern EFI_COMPONENT_NAME2_PROTOCOL gVgaClassComponentName2;\r | |
41 | \r | |
42 | \r | |
43 | //\r | |
44 | // Structure for tuple containing mapping among uniocde, PC Ansi and ASCII code.\r | |
45 | //\r | |
46 | typedef struct {\r | |
47 | CHAR16 Unicode;\r | |
48 | CHAR8 PcAnsi;\r | |
49 | CHAR8 Ascii;\r | |
50 | } UNICODE_TO_CHAR;\r | |
51 | \r | |
52 | //\r | |
53 | // VGA specific registers\r | |
54 | //\r | |
55 | #define CRTC_CURSOR_START 0xA\r | |
56 | #define CRTC_CURSOR_END 0xB\r | |
57 | \r | |
58 | #define CRTC_CURSOR_LOCATION_HIGH 0xE\r | |
59 | #define CRTC_CURSOR_LOCATION_LOW 0xF\r | |
60 | \r | |
61 | #define EFI_MAX_ATTRIBUTE 0x7f\r | |
62 | \r | |
63 | //\r | |
64 | // VGA Class Device Structure\r | |
65 | //\r | |
66 | #define VGA_CLASS_DEV_SIGNATURE SIGNATURE_32 ('V', 'G', 'A', 'C')\r | |
67 | \r | |
68 | typedef struct {\r | |
69 | UINTN Signature;\r | |
70 | EFI_HANDLE Handle;\r | |
71 | EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL SimpleTextOut;\r | |
72 | EFI_SIMPLE_TEXT_OUTPUT_MODE SimpleTextOutputMode;\r | |
73 | EFI_VGA_MINI_PORT_PROTOCOL *VgaMiniPort;\r | |
74 | EFI_PCI_IO_PROTOCOL *PciIo;\r | |
75 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
76 | } VGA_CLASS_DEV;\r | |
77 | \r | |
78 | #define VGA_CLASS_DEV_FROM_THIS(a) CR (a, VGA_CLASS_DEV, SimpleTextOut, VGA_CLASS_DEV_SIGNATURE)\r | |
79 | \r | |
80 | //\r | |
81 | // Driver Binding Protocol functions\r | |
82 | //\r | |
83 | \r | |
84 | /**\r | |
85 | Tests to see if this driver supports a given controller.\r | |
86 | \r | |
87 | This function implments EFI_DRIVER_BINDING_PROTOCOL.Supported().\r | |
88 | It Checks if this driver supports the controller specified. Any Controller\r | |
89 | with VgaMiniPort Protocol and Pci I/O protocol can be supported.\r | |
90 | \r | |
91 | @param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
92 | @param ControllerHandle Handle of device to test\r | |
93 | @param RemainingDevicePath Optional parameter use to pick a specific child\r | |
94 | device to start.\r | |
95 | \r | |
96 | @retval EFI_SUCCESS This driver supports this device.\r | |
97 | @retval EFI_ALREADY_STARTED This driver is already running on this device.\r | |
98 | @retval EFI_UNSUPPORTED This driver does not support this device.\r | |
99 | \r | |
100 | **/\r | |
101 | EFI_STATUS\r | |
102 | EFIAPI\r | |
103 | VgaClassDriverBindingSupported (\r | |
104 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
105 | IN EFI_HANDLE Controller,\r | |
106 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
107 | );\r | |
108 | \r | |
109 | /**\r | |
110 | Starts the device controller.\r | |
111 | \r | |
112 | This function implments EFI_DRIVER_BINDING_PROTOCOL.Start().\r | |
113 | It starts the device specified by Controller with the driver based on PCI I/O Protocol\r | |
114 | and VgaMiniPort Protocol. It creates context for device instance and install EFI_SIMPLE_TEXT_OUT_PROTOCOL.\r | |
115 | \r | |
116 | @param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
117 | @param ControllerHandle Handle of device to bind driver to\r | |
118 | @param RemainingDevicePath Optional parameter use to pick a specific child\r | |
119 | device to start.\r | |
120 | \r | |
121 | @retval EFI_SUCCESS The device was started.\r | |
122 | @retval other Fail to start the device.\r | |
123 | \r | |
124 | **/\r | |
125 | EFI_STATUS\r | |
126 | EFIAPI\r | |
127 | VgaClassDriverBindingStart (\r | |
128 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
129 | IN EFI_HANDLE Controller,\r | |
130 | IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r | |
131 | );\r | |
132 | \r | |
133 | /**\r | |
134 | Starts the device controller.\r | |
135 | \r | |
136 | This function implments EFI_DRIVER_BINDING_PROTOCOL.Stop().\r | |
137 | It stops this driver on Controller. Support stopping any child handles\r | |
138 | created by this driver.\r | |
139 | \r | |
140 | @param This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance.\r | |
141 | @param ControllerHandle A handle to the device being stopped.\r | |
142 | @param NumberOfChildren The number of child device handles in ChildHandleBuffer.\r | |
143 | @param ChildHandleBuffer An array of child handles to be freed.\r | |
144 | \r | |
145 | @retval EFI_SUCCESS This driver is removed ControllerHandle\r | |
146 | @retval other This driver was not removed from this device\r | |
147 | \r | |
148 | **/\r | |
149 | EFI_STATUS\r | |
150 | EFIAPI\r | |
151 | VgaClassDriverBindingStop (\r | |
152 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
153 | IN EFI_HANDLE Controller,\r | |
154 | IN UINTN NumberOfChildren,\r | |
155 | IN EFI_HANDLE *ChildHandleBuffer OPTIONAL\r | |
156 | );\r | |
157 | \r | |
158 | //\r | |
159 | // EFI Component Name Functions\r | |
160 | //\r | |
161 | \r | |
162 | /**\r | |
163 | Retrieves a Unicode string that is the user readable name of the driver.\r | |
164 | \r | |
165 | This function retrieves the user readable name of a driver in the form of a\r | |
166 | Unicode string. If the driver specified by This has a user readable name in\r | |
167 | the language specified by Language, then a pointer to the driver name is\r | |
168 | returned in DriverName, and EFI_SUCCESS is returned. If the driver specified\r | |
169 | by This does not support the language specified by Language,\r | |
170 | then EFI_UNSUPPORTED is returned.\r | |
171 | \r | |
172 | @param This A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or\r | |
173 | EFI_COMPONENT_NAME_PROTOCOL instance.\r | |
174 | @param Language A pointer to a Null-terminated ASCII string\r | |
175 | array indicating the language. This is the\r | |
176 | language of the driver name that the caller is\r | |
177 | requesting, and it must match one of the\r | |
178 | languages specified in SupportedLanguages. The\r | |
179 | number of languages supported by a driver is up\r | |
180 | to the driver writer. Language is specified\r | |
181 | in RFC 4646 or ISO 639-2 language code format.\r | |
182 | @param DriverName A pointer to the Unicode string to return.\r | |
183 | This Unicode string is the name of the\r | |
184 | driver specified by This in the language\r | |
185 | specified by Language.\r | |
186 | \r | |
187 | @retval EFI_SUCCESS The Unicode string for the Driver specified by\r | |
188 | This and the language specified by Language was\r | |
189 | returned in DriverName.\r | |
190 | @retval EFI_INVALID_PARAMETER Language is NULL.\r | |
191 | @retval EFI_INVALID_PARAMETER DriverName is NULL.\r | |
192 | @retval EFI_UNSUPPORTED The driver specified by This does not support\r | |
193 | the language specified by Language.\r | |
194 | \r | |
195 | **/\r | |
196 | EFI_STATUS\r | |
197 | EFIAPI\r | |
198 | VgaClassComponentNameGetDriverName (\r | |
199 | IN EFI_COMPONENT_NAME_PROTOCOL *This,\r | |
200 | IN CHAR8 *Language,\r | |
201 | OUT CHAR16 **DriverName\r | |
202 | );\r | |
203 | \r | |
204 | /**\r | |
205 | Retrieves a Unicode string that is the user readable name of the controller\r | |
206 | that is being managed by a driver.\r | |
207 | \r | |
208 | This function retrieves the user readable name of the controller specified by\r | |
209 | ControllerHandle and ChildHandle in the form of a Unicode string. If the\r | |
210 | driver specified by This has a user readable name in the language specified by\r | |
211 | Language, then a pointer to the controller name is returned in ControllerName,\r | |
212 | and EFI_SUCCESS is returned. If the driver specified by This is not currently\r | |
213 | managing the controller specified by ControllerHandle and ChildHandle,\r | |
214 | then EFI_UNSUPPORTED is returned. If the driver specified by This does not\r | |
215 | support the language specified by Language, then EFI_UNSUPPORTED is returned.\r | |
216 | \r | |
217 | @param This A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or\r | |
218 | EFI_COMPONENT_NAME_PROTOCOL instance.\r | |
219 | @param ControllerHandle The handle of a controller that the driver\r | |
220 | specified by This is managing. This handle\r | |
221 | specifies the controller whose name is to be\r | |
222 | returned.\r | |
223 | @param ChildHandle The handle of the child controller to retrieve\r | |
224 | the name of. This is an optional parameter that\r | |
225 | may be NULL. It will be NULL for device\r | |
226 | drivers. It will also be NULL for a bus drivers\r | |
227 | that wish to retrieve the name of the bus\r | |
228 | controller. It will not be NULL for a bus\r | |
229 | driver that wishes to retrieve the name of a\r | |
230 | child controller.\r | |
231 | @param Language A pointer to a Null-terminated ASCII string\r | |
232 | array indicating the language. This is the\r | |
233 | language of the driver name that the caller is\r | |
234 | requesting, and it must match one of the\r | |
235 | languages specified in SupportedLanguages. The\r | |
236 | number of languages supported by a driver is up\r | |
237 | to the driver writer. Language is specified in\r | |
238 | RFC 4646 or ISO 639-2 language code format.\r | |
239 | @param ControllerName A pointer to the Unicode string to return.\r | |
240 | This Unicode string is the name of the\r | |
241 | controller specified by ControllerHandle and\r | |
242 | ChildHandle in the language specified by\r | |
243 | Language from the point of view of the driver\r | |
244 | specified by This.\r | |
245 | \r | |
246 | @retval EFI_SUCCESS The Unicode string for the user readable name in\r | |
247 | the language specified by Language for the\r | |
248 | driver specified by This was returned in\r | |
249 | DriverName.\r | |
250 | @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.\r | |
251 | @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid\r | |
252 | EFI_HANDLE.\r | |
253 | @retval EFI_INVALID_PARAMETER Language is NULL.\r | |
254 | @retval EFI_INVALID_PARAMETER ControllerName is NULL.\r | |
255 | @retval EFI_UNSUPPORTED The driver specified by This is not currently\r | |
256 | managing the controller specified by\r | |
257 | ControllerHandle and ChildHandle.\r | |
258 | @retval EFI_UNSUPPORTED The driver specified by This does not support\r | |
259 | the language specified by Language.\r | |
260 | \r | |
261 | **/\r | |
262 | EFI_STATUS\r | |
263 | EFIAPI\r | |
264 | VgaClassComponentNameGetControllerName (\r | |
265 | IN EFI_COMPONENT_NAME_PROTOCOL *This,\r | |
266 | IN EFI_HANDLE ControllerHandle,\r | |
267 | IN EFI_HANDLE ChildHandle OPTIONAL,\r | |
268 | IN CHAR8 *Language,\r | |
269 | OUT CHAR16 **ControllerName\r | |
270 | );\r | |
271 | \r | |
272 | //\r | |
273 | // Simple Text Output Protocol functions\r | |
274 | //\r | |
275 | /**\r | |
276 | Resets the text output device hardware.\r | |
277 | \r | |
278 | This function implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.Reset().\r | |
279 | It resets the text output device hardware. The cursor position is set to (0, 0),\r | |
280 | and the screen is cleared to the default background color for the output device.\r | |
281 | \r | |
282 | @param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL instance.\r | |
283 | @param ExtendedVerification Indicates that the driver may perform a more exhaustive\r | |
284 | verification operation of the device during reset.\r | |
285 | \r | |
286 | @retval EFI_SUCCESS The text output device was reset.\r | |
287 | @retval EFI_DEVICE_ERROR The text output device is not functioning correctly and could not be reset.\r | |
288 | \r | |
289 | **/\r | |
290 | EFI_STATUS\r | |
291 | EFIAPI\r | |
292 | VgaClassReset (\r | |
293 | IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,\r | |
294 | IN BOOLEAN ExtendedVerification\r | |
295 | );\r | |
296 | \r | |
297 | /**\r | |
298 | Writes a Unicode string to the output device.\r | |
299 | \r | |
300 | This function implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.OutputString().\r | |
301 | It writes a Unicode string to the output device. This is the most basic output mechanism\r | |
302 | on an output device.\r | |
303 | \r | |
304 | @param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL instance.\r | |
305 | @param String The Null-terminated Unicode string to be displayed on the output device(s).\r | |
306 | \r | |
307 | @retval EFI_SUCCESS The string was output to the device.\r | |
308 | @retval EFI_DEVICE_ERROR The device reported an error while attempting to output the text.\r | |
309 | @retval EFI_UNSUPPORTED The output device's mode is not currently in a defined text mode.\r | |
310 | @retval EFI_WARN_UNKNOWN_GLYPH This warning code indicates that some of the characters in\r | |
311 | the Unicode string could not be rendered and were skipped.\r | |
312 | **/\r | |
313 | EFI_STATUS\r | |
314 | EFIAPI\r | |
315 | VgaClassOutputString (\r | |
316 | IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,\r | |
317 | IN CHAR16 *String\r | |
318 | );\r | |
319 | \r | |
320 | /**\r | |
321 | Verifies that all characters in a Unicode string can be output to the target device.\r | |
322 | \r | |
323 | This function implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.TestString().\r | |
324 | It verifies that all characters in a Unicode string can be output to the target device.\r | |
325 | \r | |
326 | @param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL instance.\r | |
327 | @param String The Null-terminated Unicode string to be examined for the output device(s).\r | |
328 | \r | |
329 | @retval EFI_SUCCESS The device(s) are capable of rendering the output string.\r | |
330 | @retval EFI_UNSUPPORTED Some of the characters in the Unicode string cannot be rendered by\r | |
331 | one or more of the output devices mapped by the EFI handle.\r | |
332 | \r | |
333 | **/\r | |
334 | EFI_STATUS\r | |
335 | EFIAPI\r | |
336 | VgaClassTestString (\r | |
337 | IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,\r | |
338 | IN CHAR16 *String\r | |
339 | );\r | |
340 | \r | |
341 | /**\r | |
342 | Clears the output device(s) display to the currently selected background color.\r | |
343 | \r | |
344 | This function implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.ClearScreen().\r | |
345 | The ClearScreen() function clears the output device(s) display to the currently\r | |
346 | selected background color. The cursor position is set to (0, 0).\r | |
347 | \r | |
348 | @param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL instance.\r | |
349 | \r | |
350 | @retval EFI_SUCESS The operation completed successfully.\r | |
351 | @retval EFI_DEVICE_ERROR The device had an error and could not complete the request.\r | |
352 | @retval EFI_UNSUPPORTED The output device is not in a valid text mode.\r | |
353 | \r | |
354 | **/\r | |
355 | EFI_STATUS\r | |
356 | EFIAPI\r | |
357 | VgaClassClearScreen (\r | |
358 | IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This\r | |
359 | );\r | |
360 | \r | |
361 | /**\r | |
362 | Sets the background and foreground colors for theOutputString() and ClearScreen() functions.\r | |
363 | \r | |
364 | This function implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetAttribute().\r | |
365 | It sets the background and foreground colors for the OutputString() and ClearScreen() functions.\r | |
366 | The color mask can be set even when the device is in an invalid text mode.\r | |
367 | Devices supporting a different number of text colors are required to emulate the above colors\r | |
368 | to the best of the device's capabilities.\r | |
369 | \r | |
370 | @param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL instance.\r | |
371 | @param Attribute The attribute to set.\r | |
372 | Bits 0..3 are the foreground color,\r | |
373 | and bits 4..6 are the background color.\r | |
374 | \r | |
375 | @retval EFI_SUCCESS The requested attributes were set.\r | |
376 | @retval EFI_DEVICE_ERROR The device had an error and could not complete the request.\r | |
377 | \r | |
378 | **/\r | |
379 | EFI_STATUS\r | |
380 | EFIAPI\r | |
381 | VgaClassSetAttribute (\r | |
382 | IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,\r | |
383 | IN UINTN Attribute\r | |
384 | );\r | |
385 | \r | |
386 | /**\r | |
387 | Sets the current coordinates of the cursor position.\r | |
388 | \r | |
389 | This function implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.SetCursorPosition().\r | |
390 | It sets the current coordinates of the cursor position.\r | |
391 | The upper left corner of the screen is defined as coordinate (0, 0).\r | |
392 | \r | |
393 | @param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL instance.\r | |
394 | @param Column Column of position to set the cursor to.\r | |
395 | @param Row Row of position to set the cursor to.\r | |
396 | \r | |
397 | @retval EFI_SUCCESS The operation completed successfully.\r | |
398 | @retval EFI_DEVICE_ERROR The device had an error and could not complete the request.\r | |
399 | @retval EFI_UNSUPPORTED The output device is not in a valid text mode, or the cursor\r | |
400 | position is invalid for the current mode.\r | |
401 | \r | |
402 | **/\r | |
403 | EFI_STATUS\r | |
404 | EFIAPI\r | |
405 | VgaClassSetCursorPosition (\r | |
406 | IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,\r | |
407 | IN UINTN Column,\r | |
408 | IN UINTN Row\r | |
409 | );\r | |
410 | \r | |
411 | /**\r | |
412 | Makes the cursor visible or invisible.\r | |
413 | \r | |
414 | This function implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.EnableCursor().\r | |
415 | It makes the cursor visible or invisible.\r | |
416 | \r | |
417 | @param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL instance.\r | |
418 | @param Visible If TRUE, the cursor is set to be visible.\r | |
419 | If FALSE, the cursor is set to be invisible.\r | |
420 | \r | |
421 | @retval EFI_SUCESS The operation completed successfully.\r | |
422 | @retval EFI_DEVICE_ERROR The device had an error and could not complete the request or the\r | |
423 | device does not support changing the cursor mode.\r | |
424 | @retval EFI_UNSUPPORTED The output device does not support visibility control of the cursor.\r | |
425 | \r | |
426 | **/\r | |
427 | EFI_STATUS\r | |
428 | EFIAPI\r | |
429 | VgaClassEnableCursor (\r | |
430 | IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,\r | |
431 | IN BOOLEAN Visible\r | |
432 | );\r | |
433 | \r | |
434 | /**\r | |
435 | Returns information for an available text mode that the output device(s) supports.\r | |
436 | \r | |
437 | This function implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.QueryMode().\r | |
438 | It returns information for an available text mode that the output device(s) supports.\r | |
439 | It is required that all output devices support at least 80x25 text mode. This mode is defined to be mode 0.\r | |
440 | If the output devices support 80x50, that is defined to be mode 1.\r | |
441 | \r | |
442 | @param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL instance.\r | |
443 | @param ModeNumber The mode number to return information on.\r | |
444 | @param Columns Columen in current mode number\r | |
445 | @param Rows Row in current mode number.\r | |
446 | \r | |
447 | @retval EFI_SUCCESS The requested mode information was returned.\r | |
448 | @retval EFI_DEVICE_ERROR The device had an error and could not complete the request.\r | |
449 | @retval EFI_UNSUPPORTED The mode number was not valid.\r | |
450 | \r | |
451 | **/\r | |
452 | EFI_STATUS\r | |
453 | EFIAPI\r | |
454 | VgaClassQueryMode (\r | |
455 | IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,\r | |
456 | IN UINTN ModeNumber,\r | |
457 | OUT UINTN *Columns,\r | |
458 | OUT UINTN *Rows\r | |
459 | );\r | |
460 | \r | |
461 | /**\r | |
462 | Sets the output device(s) to a specified mode.\r | |
463 | \r | |
464 | This function implements EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.QueryMode().\r | |
465 | It sets the output device(s) to the requested mode.\r | |
466 | On success the device is in the geometry for the requested mode,\r | |
467 | and the device has been cleared to the current background color with the cursor at (0,0).\r | |
468 | \r | |
469 | @param This Pointer to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL instance.\r | |
470 | @param ModeNumber The text mode to set.\r | |
471 | \r | |
472 | @retval EFI_SUCCESS The requested text mode was set.\r | |
473 | @retval EFI_DEVICE_ERROR The device had an error and could not complete the request.\r | |
474 | @retval EFI_UNSUPPORTED The mode number was not valid.\r | |
475 | \r | |
476 | **/\r | |
477 | EFI_STATUS\r | |
478 | EFIAPI\r | |
479 | VgaClassSetMode (\r | |
480 | IN EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *This,\r | |
481 | IN UINTN ModeNumber\r | |
482 | );\r | |
483 | \r | |
484 | #endif\r |