1 | /*␊ |
2 | * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
7 | * Reserved. This file contains Original Code and/or Modifications of␊ |
8 | * Original Code as defined in and that are subject to the Apple Public␊ |
9 | * Source License Version 2.0 (the "License"). You may not use this file␊ |
10 | * except in compliance with the License. Please obtain a copy of the␊ |
11 | * License at http://www.apple.com/publicsource and read it before using␊ |
12 | * this file.␊ |
13 | * ␊ |
14 | * The Original Code and all software distributed under the License are␊ |
15 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
18 | * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
19 | * License for the specific language governing rights and limitations␊ |
20 | * under the License.␊ |
21 | * ␊ |
22 | * @APPLE_LICENSE_HEADER_END@␊ |
23 | */␊ |
24 | /*␊ |
25 | * Copyright 1993 NeXT, Inc.␊ |
26 | * All rights reserved.␊ |
27 | */␊ |
28 | ␊ |
29 | #include "boot.h"␊ |
30 | #include "graphics.h"␊ |
31 | #include "vbe.h"␊ |
32 | #include "appleClut8.h"␊ |
33 | #include "bootstruct.h"␊ |
34 | #include "modules.h"␊ |
35 | ␊ |
36 | #define VIDEO(x) (bootArgs->Video.v_ ## x)␊ |
37 | ␊ |
38 | #define MIN(x, y) ((x) < (y) ? (x) : (y))␊ |
39 | ␊ |
40 | static void setupPalette( VBEPalette * p, const unsigned char * g );␊ |
41 | static int␊ |
42 | setVESATextMode( unsigned short cols,␊ |
43 | ␉␉␉␉unsigned short rows,␊ |
44 | ␉␉␉␉unsigned char bitsPerPixel );␊ |
45 | ␊ |
46 | static int initGraphicsMode (void);␊ |
47 | ␊ |
48 | static unsigned long lookUpCLUTIndex( unsigned char index,␊ |
49 | unsigned char depth );␊ |
50 | ␊ |
51 | static void * stosl(void * dst, long val, long len);␊ |
52 | ␊ |
53 | int␊ |
54 | __convertImage( unsigned short width,␊ |
55 | unsigned short height,␊ |
56 | const unsigned char *imageData,␊ |
57 | unsigned char **newImageData )␊ |
58 | {␊ |
59 | int cnt;␊ |
60 | unsigned char *img = 0;␊ |
61 | unsigned short *img16;␊ |
62 | unsigned long *img32;␊ |
63 | ␉␊ |
64 | switch ( VIDEO(depth) ) {␊ |
65 | ␉␉case 16 :␊ |
66 | ␉␉␉img16 = malloc(width * height * 2);␊ |
67 | ␉␉␉if ( !img16 ) break;␊ |
68 | ␉␉␉for (cnt = 0; cnt < (width * height); cnt++)␊ |
69 | ␉␉␉␉img16[cnt] = lookUpCLUTIndex(imageData[cnt], 16);␊ |
70 | ␉␉␉img = (unsigned char *)img16;␊ |
71 | ␉␉␉break;␊ |
72 | ␉␉␉␊ |
73 | ␉␉case 32 :␊ |
74 | ␉␉␉img32 = malloc(width * height * 4);␊ |
75 | ␉␉␉if ( !img32 ) break;␊ |
76 | ␉␉␉for (cnt = 0; cnt < (width * height); cnt++)␊ |
77 | ␉␉␉␉img32[cnt] = lookUpCLUTIndex(imageData[cnt], 32);␊ |
78 | ␉␉␉img = (unsigned char *)img32;␊ |
79 | ␉␉␉break;␊ |
80 | ␉␉␉␊ |
81 | ␉␉default :␊ |
82 | ␉␉␉img = malloc(width * height);␊ |
83 | ␉␉␉bcopy(imageData, img, width * height);␊ |
84 | ␉␉␉break;␊ |
85 | }␊ |
86 | *newImageData = img;␊ |
87 | return 0;␊ |
88 | }␊ |
89 | ␊ |
90 | //==========================================================================␊ |
91 | // drawDataRectangle␊ |
92 | ␊ |
93 | void __drawDataRectangle( unsigned short x,␊ |
94 | unsigned short y,␊ |
95 | unsigned short width,␊ |
96 | unsigned short height,␊ |
97 | unsigned char * data )␊ |
98 | {␊ |
99 | unsigned short drawWidth;␊ |
100 | long pixelBytes = VIDEO(depth) / 8;␊ |
101 | unsigned char * vram = (unsigned char *) VIDEO(baseAddr) +␊ |
102 | ␉VIDEO(rowBytes) * y + pixelBytes * x;␊ |
103 | ␉␊ |
104 | drawWidth = MIN(width, VIDEO(width) - x);␊ |
105 | height = MIN(height, VIDEO(height) - y);␊ |
106 | while ( height-- ) {␊ |
107 | bcopy( data, vram, drawWidth * pixelBytes );␊ |
108 | vram += VIDEO(rowBytes);␊ |
109 | data += width * pixelBytes;␊ |
110 | }␊ |
111 | }␊ |
112 | ␊ |
113 | //==========================================================================␊ |
114 | // getVESAModeWithProperties␊ |
115 | //␊ |
116 | // Return the VESA mode that matches the properties specified.␊ |
117 | // If a mode is not found, then return the "best" available mode.␊ |
118 | ␊ |
119 | unsigned short␊ |
120 | __getVESAModeWithProperties( unsigned short width,␊ |
121 | unsigned short height,␊ |
122 | unsigned char bitsPerPixel,␊ |
123 | unsigned short attributesSet,␊ |
124 | unsigned short attributesClear,␊ |
125 | VBEModeInfoBlock * outModeInfo,␊ |
126 | unsigned short * vesaVersion )␊ |
127 | {␊ |
128 | VBEInfoBlock vbeInfo;␊ |
129 | unsigned short * modePtr;␊ |
130 | VBEModeInfoBlock modeInfo;␊ |
131 | unsigned char modeBitsPerPixel;␊ |
132 | unsigned short matchedMode = modeEndOfList;␊ |
133 | int err;␊ |
134 | ␉␊ |
135 | // Clear output mode info.␊ |
136 | ␉␊ |
137 | //bzero( outModeInfo, sizeof(*outModeInfo) );␊ |
138 | ␉bzero( outModeInfo, sizeof(VBEModeInfoBlock) );␊ |
139 | ␉␊ |
140 | // Get VBE controller info containing the list of supported modes.␊ |
141 | ␉␊ |
142 | //bzero( &vbeInfo, sizeof(vbeInfo) );␊ |
143 | bzero( &vbeInfo, sizeof(VBEInfoBlock) );␊ |
144 | ␊ |
145 | strcpy( (char*)&vbeInfo, "VBE2" );␊ |
146 | err = getVBEInfo( &vbeInfo );␊ |
147 | if ( err != errSuccess )␊ |
148 | {␊ |
149 | return modeEndOfList;␊ |
150 | }␊ |
151 | ␉␊ |
152 | // Report the VESA major/minor version number.␊ |
153 | ␉␊ |
154 | if (vesaVersion) *vesaVersion = vbeInfo.VESAVersion;␊ |
155 | ␉␊ |
156 | // Loop through the mode list, and find the matching mode.␊ |
157 | ␉␊ |
158 | for ( modePtr = VBEDecodeFP( unsigned short *, vbeInfo.VideoModePtr );␊ |
159 | ␉␉ *modePtr != modeEndOfList; modePtr++ )␊ |
160 | {␊ |
161 | // Get mode information.␊ |
162 | ␉␉␊ |
163 | //bzero( &modeInfo, sizeof(modeInfo) );␊ |
164 | bzero( &modeInfo, sizeof(VBEModeInfoBlock) );␊ |
165 | ␉␉␊ |
166 | err = getVBEModeInfo( *modePtr, &modeInfo );␊ |
167 | if ( err != errSuccess )␊ |
168 | {␊ |
169 | continue;␊ |
170 | }␊ |
171 | ␉␉␊ |
172 | #if DEBUG␊ |
173 | printf("Mode %x: %dx%dx%d mm:%d attr:%x\n",␊ |
174 | *modePtr, modeInfo.XResolution, modeInfo.YResolution,␊ |
175 | modeInfo.BitsPerPixel, modeInfo.MemoryModel,␊ |
176 | modeInfo.ModeAttributes);␊ |
177 | #endif␊ |
178 | ␉␉␊ |
179 | // Filter out unwanted modes based on mode attributes.␊ |
180 | ␉␉␊ |
181 | if ( ( ( modeInfo.ModeAttributes & attributesSet ) != attributesSet )␊ |
182 | ␉␉␉|| ( ( modeInfo.ModeAttributes & attributesClear ) != 0 ) )␊ |
183 | {␊ |
184 | continue;␊ |
185 | }␊ |
186 | ␉␉␊ |
187 | // Pixel depth in bits.␊ |
188 | ␉␉␊ |
189 | modeBitsPerPixel = modeInfo.BitsPerPixel;␊ |
190 | ␉␉␊ |
191 | if ( ( modeBitsPerPixel == 4 ) && ( modeInfo.MemoryModel == 0 ) )␊ |
192 | {␊ |
193 | // Text mode, 16 colors.␊ |
194 | }␊ |
195 | else if ( ( modeBitsPerPixel == 8 ) && ( modeInfo.MemoryModel == 4 ) )␊ |
196 | {␊ |
197 | // Packed pixel, 256 colors.␊ |
198 | }␊ |
199 | else if ( ( ( modeBitsPerPixel == 16 ) || ( modeBitsPerPixel == 15 ) )␊ |
200 | ␉␉␉␉ && ( modeInfo.MemoryModel == 6 )␊ |
201 | ␉␉␉␉ && ( modeInfo.RedMaskSize == 5 )␊ |
202 | ␉␉␉␉ && ( modeInfo.GreenMaskSize == 5 )␊ |
203 | ␉␉␉␉ && ( modeInfo.BlueMaskSize == 5 ) )␊ |
204 | {␊ |
205 | // Direct color, 16 bpp (1:5:5:5).␊ |
206 | modeInfo.BitsPerPixel = modeBitsPerPixel = 16;␊ |
207 | }␊ |
208 | else if ( ( modeBitsPerPixel == 32 )␊ |
209 | ␉␉␉␉ && ( modeInfo.MemoryModel == 6 )␊ |
210 | ␉␉␉␉ && ( modeInfo.RedMaskSize == 8 )␊ |
211 | ␉␉␉␉ && ( modeInfo.GreenMaskSize == 8 )␊ |
212 | ␉␉␉␉ && ( modeInfo.BlueMaskSize == 8 ) )␊ |
213 | {␊ |
214 | // Direct color, 32 bpp (8:8:8:8).␊ |
215 | }␊ |
216 | else␊ |
217 | {␊ |
218 | continue; // Not a supported mode.␊ |
219 | }␊ |
220 | ␉␉␊ |
221 | // Modes larger than the specified dimensions are skipped.␊ |
222 | ␉␉␊ |
223 | if ( ( modeInfo.XResolution > width ) ||␊ |
224 | ␉␉␉( modeInfo.YResolution > height ) )␊ |
225 | {␊ |
226 | continue;␊ |
227 | }␊ |
228 | ␉␉␊ |
229 | // Perfect match, we're done looking.␊ |
230 | ␉␉␊ |
231 | if ( ( modeInfo.XResolution == width ) &&␊ |
232 | ␉␉␉( modeInfo.YResolution == height ) &&␊ |
233 | ␉␉␉( modeBitsPerPixel == bitsPerPixel ) )␊ |
234 | {␊ |
235 | matchedMode = *modePtr;␊ |
236 | //bcopy( &modeInfo, outModeInfo, sizeof(modeInfo) ); ␊ |
237 | bcopy( &modeInfo, outModeInfo, sizeof(VBEModeInfoBlock) );␊ |
238 | ␉␉␉␊ |
239 | break;␊ |
240 | }␊ |
241 | ␉␉␊ |
242 | // Save the next "best" mode in case a perfect match is not found.␊ |
243 | ␉␉␊ |
244 | if ( modeInfo.XResolution == outModeInfo->XResolution &&␊ |
245 | ␉␉␉modeInfo.YResolution == outModeInfo->YResolution &&␊ |
246 | ␉␉␉modeBitsPerPixel <= outModeInfo->BitsPerPixel )␊ |
247 | {␊ |
248 | continue; // Saved mode has more depth.␊ |
249 | }␊ |
250 | if ( modeInfo.XResolution < outModeInfo->XResolution ||␊ |
251 | ␉␉␉modeInfo.YResolution < outModeInfo->YResolution ||␊ |
252 | ␉␉␉modeBitsPerPixel < outModeInfo->BitsPerPixel )␊ |
253 | {␊ |
254 | continue; // Saved mode has more resolution.␊ |
255 | }␊ |
256 | ␉␉␊ |
257 | matchedMode = *modePtr;␊ |
258 | //bcopy( &modeInfo, outModeInfo, sizeof(modeInfo) );␊ |
259 | bcopy( &modeInfo, outModeInfo, sizeof(VBEModeInfoBlock) );␊ |
260 | ␉␉␊ |
261 | }␊ |
262 | ␉␊ |
263 | return matchedMode;␊ |
264 | }␊ |
265 | ␊ |
266 | //==========================================================================␊ |
267 | // setupPalette␊ |
268 | ␊ |
269 | static void setupPalette( VBEPalette * p, const unsigned char * g )␊ |
270 | {␊ |
271 | int i;␊ |
272 | unsigned char * source = (unsigned char *) g;␊ |
273 | ␉␊ |
274 | for (i = 0; i < 256; i++)␊ |
275 | {␊ |
276 | (*p)[i] = 0;␊ |
277 | (*p)[i] |= ((unsigned long)((*source++) >> 2)) << 16; // Red␊ |
278 | (*p)[i] |= ((unsigned long)((*source++) >> 2)) << 8; // Green␊ |
279 | (*p)[i] |= ((unsigned long)((*source++) >> 2)); // Blue␊ |
280 | ␉␉␊ |
281 | }␊ |
282 | }␊ |
283 | ␊ |
284 | //==========================================================================␊ |
285 | // setVESAGraphicsMode␊ |
286 | #if UNUSED␊ |
287 | int __setVESAGraphicsMode( unsigned short width, unsigned short height, unsigned char bitsPerPixel, unsigned short refreshRate )␊ |
288 | #else␊ |
289 | int __setVESAGraphicsMode( unsigned short width, unsigned short height, unsigned char bitsPerPixel)␊ |
290 | #endif␊ |
291 | {␊ |
292 | VBEModeInfoBlock minfo;␊ |
293 | unsigned short mode;␊ |
294 | unsigned short vesaVersion;␊ |
295 | int err = errFuncNotSupported;␊ |
296 | ␉␊ |
297 | do {␊ |
298 | mode = __getVESAModeWithProperties( width, height, bitsPerPixel,␊ |
299 | maColorModeBit |␊ |
300 | maModeIsSupportedBit |␊ |
301 | maGraphicsModeBit |␊ |
302 | maLinearFrameBufferAvailBit,␊ |
303 | 0,␊ |
304 | &minfo, &vesaVersion );␊ |
305 | if ( mode == modeEndOfList )␊ |
306 | {␊ |
307 | break;␊ |
308 | }␊ |
309 | #if UNUSED␊ |
310 | ␉␉//␊ |
311 | ␉␉// FIXME : generateCRTCTiming() causes crash.␊ |
312 | ␉␉//␊ |
313 | ␉␉␊ |
314 | ␉␉// if ( (vesaVersion >> 8) >= 3 && refreshRate >= 60 &&␊ |
315 | ␉␉// (get_env(envgBootMode) & kBootModeSafe) == 0 )␊ |
316 | ␉␉// {␊ |
317 | ␉␉// VBECRTCInfoBlock timing;␊ |
318 | ␉␉// ␊ |
319 | ␉␉// // Generate CRTC timing for given refresh rate.␊ |
320 | ␉␉// ␊ |
321 | ␉␉// generateCRTCTiming( minfo.XResolution, minfo.YResolution,␊ |
322 | ␉␉// refreshRate, kCRTCParamRefreshRate,␊ |
323 | ␉␉// &timing );␊ |
324 | ␉␉// ␊ |
325 | ␉␉// // Find the actual pixel clock supported by the hardware.␊ |
326 | ␉␉// ␊ |
327 | ␉␉// getVBEPixelClock( mode, &timing.PixelClock );␊ |
328 | ␉␉// ␊ |
329 | ␉␉// // Re-compute CRTC timing based on actual pixel clock.␊ |
330 | ␉␉// ␊ |
331 | ␉␉// generateCRTCTiming( minfo.XResolution, minfo.YResolution,␊ |
332 | ␉␉// timing.PixelClock, kCRTCParamPixelClock,␊ |
333 | ␉␉// &timing );␊ |
334 | ␉␉// ␊ |
335 | ␉␉// // Set the video mode and use specified CRTC timing.␊ |
336 | ␉␉// ␊ |
337 | ␉␉// err = setVBEMode( mode | kLinearFrameBufferBit |␊ |
338 | ␉␉// kCustomRefreshRateBit, &timing );␊ |
339 | ␉␉// }␊ |
340 | ␉␉// else␊ |
341 | ␉␉// {␊ |
342 | ␉␉// // Set the mode with default refresh rate.␊ |
343 | ␉␉// ␊ |
344 | ␉␉// err = setVBEMode( mode | kLinearFrameBufferBit, NULL );␊ |
345 | ␉␉// }␊ |
346 | #endif␊ |
347 | // Set the mode with default refresh rate.␊ |
348 | ␉␉␊ |
349 | err = setVBEMode( mode | kLinearFrameBufferBit, NULL );␊ |
350 | ␉␉␊ |
351 | if ( err != errSuccess )␊ |
352 | {␊ |
353 | break;␊ |
354 | }␊ |
355 | ␉␉␊ |
356 | // Set 8-bit color palette.␊ |
357 | ␉␉␊ |
358 | if ( minfo.BitsPerPixel == 8 )␊ |
359 | {␊ |
360 | VBEPalette palette;␊ |
361 | setupPalette( &palette, appleClut8 );␊ |
362 | if ((err = setVBEPalette(palette)) != errSuccess)␊ |
363 | {␊ |
364 | break;␊ |
365 | }␊ |
366 | }␊ |
367 | ␉␉␊ |
368 | // Is this required for buggy Video BIOS implementations?␊ |
369 | // On which adapter?␊ |
370 | ␉␉␊ |
371 | if ( minfo.BytesPerScanline == 0 )␊ |
372 | ␉␉␉minfo.BytesPerScanline = ( minfo.XResolution *␊ |
373 | ␉␉␉␉␉␉␉␉␉ minfo.BitsPerPixel ) >> 3;␊ |
374 | ␉␉␊ |
375 | // Update KernBootStruct using info provided by the selected␊ |
376 | // VESA mode. ␊ |
377 | ␊ |
378 | Boot_Video␉Video;␉␉/* Video Information */␉␉␊ |
379 | ␊ |
380 | Video.v_display = GRAPHICS_MODE;␊ |
381 | Video.v_width = minfo.XResolution;␊ |
382 | Video.v_height = minfo.YResolution;␊ |
383 | Video.v_depth = minfo.BitsPerPixel;␊ |
384 | Video.v_rowBytes = minfo.BytesPerScanline;␊ |
385 | Video.v_baseAddr = VBEMakeUInt32(minfo.PhysBasePtr); ␊ |
386 | ␊ |
387 | ␉␉setBootArgsVideoStruct(&Video);␊ |
388 | ␉␉␊ |
389 | }␊ |
390 | while ( 0 );␊ |
391 | ␉␊ |
392 | return err;␊ |
393 | }␊ |
394 | ␊ |
395 | ␊ |
396 | //==========================================================================␊ |
397 | // Simple decompressor for boot images encoded in RLE format.␊ |
398 | ␊ |
399 | char * __decodeRLE( const void * rleData, int rleBlocks, int outBytes )␊ |
400 | {␊ |
401 | char *out, *cp;␊ |
402 | ␉␊ |
403 | struct RLEBlock {␊ |
404 | unsigned char count;␊ |
405 | unsigned char value;␊ |
406 | } * bp = (struct RLEBlock *) rleData;␊ |
407 | ␉␊ |
408 | out = cp = malloc( outBytes );␊ |
409 | if ( out == NULL ) return NULL;␊ |
410 | ␉␊ |
411 | while ( rleBlocks-- )␊ |
412 | {␊ |
413 | memset( cp, bp->value, bp->count );␊ |
414 | cp += bp->count;␊ |
415 | bp++;␊ |
416 | }␊ |
417 | ␉␊ |
418 | return out;␊ |
419 | }␊ |
420 | ␊ |
421 | //==========================================================================␊ |
422 | // LookUpCLUTIndex␊ |
423 | ␊ |
424 | static unsigned long lookUpCLUTIndex( unsigned char index,␊ |
425 | unsigned char depth )␊ |
426 | {␊ |
427 | long result, red, green, blue;␊ |
428 | ␉␊ |
429 | red = appleClut8[index * 3 + 0];␊ |
430 | green = appleClut8[index * 3 + 1];␊ |
431 | blue = appleClut8[index * 3 + 2];␊ |
432 | ␉␊ |
433 | switch (depth) {␊ |
434 | case 16 :␊ |
435 | result = ((red & 0xF8) << 7) | ␊ |
436 | ␉␉␉((green & 0xF8) << 2) |␊ |
437 | ␉␉␉((blue & 0xF8) >> 3);␊ |
438 | result |= (result << 16);␊ |
439 | break;␊ |
440 | ␉␉␉␊ |
441 | case 32 :␊ |
442 | result = (red << 16) | (green << 8) | blue;␊ |
443 | break;␊ |
444 | ␉␉␉␊ |
445 | default :␊ |
446 | result = index | (index << 8);␊ |
447 | result |= (result << 16);␊ |
448 | break;␊ |
449 | }␊ |
450 | ␉␊ |
451 | return result;␊ |
452 | }␊ |
453 | ␊ |
454 | //==========================================================================␊ |
455 | // drawColorRectangle␊ |
456 | ␊ |
457 | static void * stosl(void * dst, long val, long len)␊ |
458 | {␊ |
459 | asm volatile ( "rep; stosl"␊ |
460 | ␉␉␉␉ : "=c" (len), "=D" (dst)␊ |
461 | ␉␉␉␉ : "0" (len), "1" (dst), "a" (val)␊ |
462 | ␉␉␉␉ : "memory" );␊ |
463 | ␉␊ |
464 | return dst;␊ |
465 | }␊ |
466 | ␊ |
467 | void __drawColorRectangle( unsigned short x,␊ |
468 | unsigned short y,␊ |
469 | unsigned short width,␊ |
470 | unsigned short height,␊ |
471 | unsigned char colorIndex )␊ |
472 | {␊ |
473 | long pixelBytes;␊ |
474 | long color = lookUpCLUTIndex( colorIndex, VIDEO(depth) );␊ |
475 | char * vram;␊ |
476 | ␉␊ |
477 | pixelBytes = VIDEO(depth) / 8;␊ |
478 | vram = (char *) VIDEO(baseAddr) +␊ |
479 | ␉VIDEO(rowBytes) * y + pixelBytes * x;␊ |
480 | ␉␊ |
481 | width = MIN(width, VIDEO(width) - x);␊ |
482 | height = MIN(height, VIDEO(height) - y);␊ |
483 | ␉␊ |
484 | while ( height-- )␊ |
485 | {␊ |
486 | int rem = ( pixelBytes * width ) % 4;␊ |
487 | if ( rem ) bcopy( &color, vram, rem );␊ |
488 | stosl( vram + rem, color, pixelBytes * width / 4 );␊ |
489 | vram += VIDEO(rowBytes);␊ |
490 | }␊ |
491 | }␊ |
492 | ␊ |
493 | //==========================================================================␊ |
494 | // setVESATextMode␊ |
495 | ␊ |
496 | static int␊ |
497 | setVESATextMode( unsigned short cols,␊ |
498 | ␉␉␉␉unsigned short rows,␊ |
499 | ␉␉␉␉unsigned char bitsPerPixel )␊ |
500 | {␊ |
501 | VBEModeInfoBlock minfo;␊ |
502 | unsigned short mode = modeEndOfList;␊ |
503 | ␉␊ |
504 | if ( (cols != 80) || (rows != 25) ) // not 80x25 mode␊ |
505 | {␊ |
506 | mode = __getVESAModeWithProperties( cols, rows, bitsPerPixel,␊ |
507 | maColorModeBit |␊ |
508 | maModeIsSupportedBit,␊ |
509 | maGraphicsModeBit,␊ |
510 | &minfo, NULL );␊ |
511 | }␊ |
512 | ␉␊ |
513 | if ( ( mode == modeEndOfList ) || ( setVBEMode(mode, NULL) != errSuccess ) )␊ |
514 | {␊ |
515 | video_mode( 2 ); // VGA BIOS, 80x25 text mode.␊ |
516 | minfo.XResolution = 80;␊ |
517 | minfo.YResolution = 25;␊ |
518 | }␊ |
519 | ␉␊ |
520 | // Update KernBootStruct using info provided by the selected␊ |
521 | // VESA mode. ␊ |
522 | ␉␊ |
523 | Boot_Video␉Video;␉␉/* Video Information */ ␊ |
524 | ␊ |
525 | Video.v_display = VGA_TEXT_MODE;␊ |
526 | Video.v_width = 0xb8000;␊ |
527 | Video.v_height = minfo.XResolution;␊ |
528 | Video.v_depth = minfo.YResolution;␊ |
529 | Video.v_rowBytes = 8;␊ |
530 | Video.v_baseAddr = 0x8000; ␊ |
531 | ␊ |
532 | setBootArgsVideoStruct(&Video);␊ |
533 | ␊ |
534 | return errSuccess; // always return success␊ |
535 | }␊ |
536 | ␊ |
537 | //==========================================================================␊ |
538 | // getNumberArrayFromProperty␊ |
539 | ␊ |
540 | int␊ |
541 | __getNumberArrayFromProperty( const char * propKey,␊ |
542 | unsigned long numbers[],␊ |
543 | unsigned long maxArrayCount )␊ |
544 | {␊ |
545 | char * propStr;␊ |
546 | unsigned long count = 0;␊ |
547 | ␉␊ |
548 | propStr = newStringForKey( (char *) propKey , DEFAULT_BOOT_CONFIG );␊ |
549 | if ( propStr )␊ |
550 | {␊ |
551 | char * delimiter = propStr;␊ |
552 | char * p = propStr;␊ |
553 | ␉␉␊ |
554 | while ( count < maxArrayCount && *p != '\0' )␊ |
555 | {␊ |
556 | unsigned long val = strtoul( p, &delimiter, 10 );␊ |
557 | if ( p != delimiter )␊ |
558 | {␊ |
559 | numbers[count++] = val;␊ |
560 | p = delimiter;␊ |
561 | }␊ |
562 | while ( ( *p != '\0' ) && !isdigit(*p) )␊ |
563 | p++;␊ |
564 | }␊ |
565 | ␉␉␊ |
566 | free( propStr );␊ |
567 | }␊ |
568 | ␉␊ |
569 | return count;␊ |
570 | }␊ |
571 | ␊ |
572 | static int initGraphicsMode (void)␊ |
573 | {␊ |
574 | ␉unsigned long params[4];␊ |
575 | ␉int count;␊ |
576 | ␉␊ |
577 | ␉params[3] = 0;␊ |
578 | ␉count = __getNumberArrayFromProperty( kGraphicsModeKey, params, 4 );␊ |
579 | ␉␊ |
580 | ␉// Try to find a resolution if "Graphics Mode" setting is not available.␊ |
581 | ␉if ( count < 3 )␊ |
582 | ␉{␊ |
583 | ␉␉params[0] = DEFAULT_SCREEN_WIDTH;␊ |
584 | ␉␉params[1] = DEFAULT_SCREEN_HEIGHT;␊ |
585 | ␉␉params[2] = 32;␊ |
586 | ␉}␊ |
587 | ␉␊ |
588 | ␉// Map from pixel format to bits per pixel.␊ |
589 | ␉␊ |
590 | ␉if ( params[2] == 256 ) params[2] = 8;␊ |
591 | ␉if ( params[2] == 555 ) params[2] = 16;␊ |
592 | ␉if ( params[2] == 888 ) params[2] = 32;␊ |
593 | #if UNUSED␊ |
594 | ␉return __setVESAGraphicsMode( params[0], params[1], params[2], params[3] );␉␊ |
595 | #else␊ |
596 | ␉return __setVESAGraphicsMode( params[0], params[1], params[2] );␊ |
597 | #endif␊ |
598 | }␊ |
599 | ␊ |
600 | //==========================================================================␊ |
601 | // setVideoMode␊ |
602 | //␊ |
603 | // Set the video mode to VGA_TEXT_MODE or GRAPHICS_MODE.␊ |
604 | #if UNUSED␊ |
605 | void␊ |
606 | __setVideoMode( int mode, int drawgraphics)␊ |
607 | #else␊ |
608 | void␊ |
609 | __setVideoMode( int mode)␊ |
610 | #endif␊ |
611 | {␊ |
612 | unsigned long params[4];␊ |
613 | int count;␊ |
614 | int err = errSuccess;␊ |
615 | ␉␊ |
616 | if ( mode == GRAPHICS_MODE )␊ |
617 | {␊ |
618 | ␉␉if ( (err=initGraphicsMode ()) == errSuccess ) {␊ |
619 | ␉␉␉if (gVerboseMode) {␊ |
620 | ␉␉␉␉// Tell the kernel to use text mode on a linear frame buffer display␊ |
621 | ␉␉␉␉bootArgs->Video.v_display = FB_TEXT_MODE;␊ |
622 | ␉␉␉} else {␊ |
623 | ␉␉␉␉bootArgs->Video.v_display = GRAPHICS_MODE;␊ |
624 | ␉␉␉}␊ |
625 | ␉␉}␊ |
626 | }␊ |
627 | ␉␊ |
628 | if ( (mode == VGA_TEXT_MODE) || (err != errSuccess) )␊ |
629 | {␊ |
630 | count = __getNumberArrayFromProperty( kTextModeKey, params, 2 );␊ |
631 | if ( count < 2 )␊ |
632 | {␊ |
633 | params[0] = 80; // Default text mode is 80x25.␊ |
634 | params[1] = 25;␊ |
635 | }␊ |
636 | ␉␉␊ |
637 | ␉␉setVESATextMode( params[0], params[1], 4 );␊ |
638 | bootArgs->Video.v_display = VGA_TEXT_MODE;␊ |
639 | }␊ |
640 | } |