source: trunk/src/gdi32/blit.cpp@ 9678

Last change on this file since 9678 was 9576, checked in by sandervl, 23 years ago

Cleaned up SetDIBitsToDevice
File size: 25.7 KB
Line 
1/* $Id: blit.cpp,v 1.43 2003-01-01 16:32:07 sandervl Exp $ */
2
3/*
4 * GDI32 blit code
5 *
6 * Copyright 1998 Sander van Leeuwen (sandervl@xs4all.nl)
7 * Copyright 1998 Patrick Haller
8 *
9 * Project Odin Software License can be found in LICENSE.TXT
10 *
11 */
12#include <os2win.h>
13#include <stdlib.h>
14#include <stdarg.h>
15#include <string.h>
16#include <cpuhlp.h>
17#include <winuser32.h>
18#include <dbglog.h>
19#include "dibsect.h"
20#include "rgbcvt.h"
21
22#define DBG_LOCALLOG DBG_blit
23#include "dbglocal.h"
24
25static ULONG QueryPaletteSize(BITMAPINFOHEADER *pBHdr);
26ULONG CalcBitmapSize(ULONG cBits, LONG cx, LONG cy);
27
28//******************************************************************************
29//******************************************************************************
30BOOL WIN32API StretchBlt(HDC hdcDest, int nXOriginDest, int nYOriginDest,
31 int nWidthDest, int nHeightDest,
32 HDC hdcSrc, int nXOriginSrc, int nYOriginSrc,
33 int nWidthSrc, int nHeightSrc, DWORD dwRop)
34{
35 BOOL rc;
36
37 dprintf(("GDI32: StretchBlt Dest: %x (%d, %d) size (%d, %d) ROP %x",
38 hdcDest, nXOriginDest, nYOriginDest, nWidthDest, nHeightDest, dwRop));
39 dprintf(("GDI32: StretchBlt Src : %x (%d, %d) size (%d, %d)\n",
40 hdcSrc, nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc));
41
42 SetLastError(ERROR_SUCCESS);
43 if(DIBSection::getSection() != NULL)
44 {
45 DIBSection *dsect = DIBSection::findHDC(hdcSrc);
46 if(dsect)
47 {
48 rc = dsect->BitBlt(hdcDest, nXOriginDest, nYOriginDest, nWidthDest, nHeightDest,
49 nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc, dwRop);
50 return rc;
51 }
52 }
53 rc = O32_StretchBlt(hdcDest, nXOriginDest, nYOriginDest, nWidthDest, nHeightDest, hdcSrc, nXOriginSrc, nYOriginSrc, nWidthSrc, nHeightSrc, dwRop);
54 if(DIBSection::getSection() != NULL) {
55 DIBSection *destdib = DIBSection::findHDC(hdcDest);
56 if(destdib) {
57 destdib->sync(hdcDest, nYOriginDest, nHeightDest);
58 }
59 }
60 if(rc == FALSE) {
61 dprintf(("!WARNING!: GDI32: StretchBlt returned FALSE; last error %x", rc, GetLastError()));
62 }
63 return rc;
64}
65//******************************************************************************
66//******************************************************************************
67BOOL WIN32API BitBlt(HDC hdcDest,
68 int nXDest,
69 int nYDest,
70 int nWidth,
71 int nHeight,
72 HDC hdcSrc,
73 int nXSrc,
74 int nYSrc,
75 DWORD dwRop)
76{
77 BOOL rc;
78
79#ifdef DEBUG
80 POINT point1, point2;
81 GetViewportOrgEx(hdcDest, &point1);
82 GetViewportOrgEx(hdcSrc, &point2);
83 dprintf(("BitBlt: Viewport origin dest (%d,%d) src (%d,%d)", point1.x, point1.y, point2.x, point2.y));
84#endif
85
86 SetLastError(ERROR_SUCCESS);
87 if(DIBSection::getSection() != NULL)
88 {
89 DIBSection *dsect = DIBSection::findHDC(hdcSrc);
90 if(dsect)
91 {
92 return dsect->BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, nXSrc, nYSrc, nWidth, nHeight, dwRop);
93 }
94 }
95 dprintf(("GDI32: BitBlt to hdc %X from hdc %x (%d,%d) to (%d,%d), (%d,%d) rop %X\n",
96 hdcDest, hdcSrc, nXSrc, nYSrc, nXDest, nYDest, nWidth, nHeight, dwRop));
97
98 rc = O32_BitBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, dwRop);
99
100 if(DIBSection::getSection() != NULL) {
101 DIBSection *destdib = DIBSection::findHDC(hdcDest);
102 if(destdib) {
103 destdib->sync(hdcDest, nYDest, nHeight);
104 }
105 }
106 return rc;
107}
108//******************************************************************************
109//******************************************************************************
110static INT SetDIBitsToDevice_(HDC hdc, INT xDest, INT yDest, DWORD cx,
111 DWORD cy, INT xSrc, INT ySrc,
112 UINT startscan, UINT lines, LPCVOID bits,
113 const BITMAPINFO *info, UINT coloruse)
114{
115 INT result, imgsize, palsize, height, width;
116 char *ptr;
117 ULONG compression = 0, bmpsize;
118 WORD *newbits = NULL;
119 DWORD bitfields[3];
120
121 dprintf(("GDI32: SetDIBitsToDevice hdc:%X xDest:%d yDest:%d, cx:%d, cy:%d, xSrc:%d, ySrc:%d, startscan:%d, lines:%d \nGDI32: bits 0x%X, info 0x%X, coloruse %d",
122 hdc, xDest, yDest, cx, cy, xSrc, ySrc, startscan, lines, (LPVOID) bits, (PBITMAPINFO)info, coloruse));
123
124 SetLastError(ERROR_SUCCESS);
125 if(info == NULL) {
126 goto invalid_parameter;
127 }
128 height = info->bmiHeader.biHeight;
129 width = info->bmiHeader.biWidth;
130
131 if (height < 0) height = -height;
132 if (!lines || (startscan >= height)) {
133 goto invalid_parameter;
134 }
135 if (startscan + lines > height) lines = height - startscan;
136
137 if (ySrc < startscan) ySrc = startscan;
138 else if (ySrc >= startscan + lines) goto invalid_parameter;
139
140 if (xSrc >= width) goto invalid_parameter;
141
142 if (ySrc + cy >= startscan + lines) cy = startscan + lines - ySrc;
143
144 if (xSrc + cx >= width) cx = width - xSrc;
145
146 if (!cx || !cy) goto invalid_parameter;
147
148 //SvL: RP7's bitmap size is not correct; fix it here or else
149 // the blit is messed up in Open32
150 imgsize = CalcBitmapSize(info->bmiHeader.biBitCount,
151 info->bmiHeader.biWidth, info->bmiHeader.biHeight);
152 bmpsize = info->bmiHeader.biSizeImage;
153 if(info->bmiHeader.biCompression == 0 && info->bmiHeader.biSizeImage &&
154 info->bmiHeader.biSizeImage < imgsize)
155 {
156 ((BITMAPINFO *)info)->bmiHeader.biSizeImage = imgsize;
157 }
158
159 switch(info->bmiHeader.biBitCount) {
160 case 15:
161 case 16: //Default if BI_BITFIELDS not set is RGB 555
162 bitfields[0] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *(DWORD *)info->bmiColors : DEFAULT_16BPP_RED_MASK;
163 bitfields[1] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *((DWORD *)info->bmiColors + 1) : DEFAULT_16BPP_GREEN_MASK;
164 bitfields[2] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *((DWORD *)info->bmiColors + 2) : DEFAULT_16BPP_BLUE_MASK;
165 break;
166
167 case 24:
168 case 32:
169 bitfields[0] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *(DWORD *)info->bmiColors : DEFAULT_24BPP_RED_MASK;
170 bitfields[1] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *((DWORD *)info->bmiColors + 1) : DEFAULT_24BPP_GREEN_MASK;
171 bitfields[2] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *((DWORD *)info->bmiColors + 2) : DEFAULT_24BPP_BLUE_MASK;
172 break;
173 default:
174 bitfields[0] = 0;
175 bitfields[1] = 0;
176 bitfields[2] = 0;
177 break;
178 }
179
180 if(bitfields[1] == 0x3E0)
181 {//RGB 555?
182 dprintf(("RGB 555->565 conversion required %x %x %x", bitfields[0], bitfields[1], bitfields[2]));
183
184 newbits = (WORD *)malloc(imgsize);
185 if(CPUFeatures & CPUID_MMX) {
186 RGB555to565MMX(newbits, (WORD *)bits, imgsize/sizeof(WORD));
187 }
188 else
189 RGB555to565(newbits, (WORD *)bits, imgsize/sizeof(WORD));
190 bits = newbits;
191 }
192
193 //SvL: Ignore BI_BITFIELDS type (SetDIBitsToDevice fails otherwise)
194 if(info->bmiHeader.biCompression == BI_BITFIELDS) {
195 ((BITMAPINFO *)info)->bmiHeader.biCompression = 0;
196 compression = BI_BITFIELDS;
197 }
198 if(startscan != 0 || lines != info->bmiHeader.biHeight) {
199 dprintf(("WARNING: SetDIBitsToDevice startscan != 0 || lines != info->bmiHeader.biHeight"));
200 dprintf(("info bmp (%d,%d)", info->bmiHeader.biWidth, info->bmiHeader.biHeight));
201 }
202
203 result = O32_StretchDIBits(hdc, xDest, yDest, cx, cy, xSrc, ySrc,
204 cx, cy, (void *)bits,
205 (PBITMAPINFO)info, coloruse, SRCCOPY);
206
207 //Open32 always returns height of bitmap (regardless of how many scanlines were copied)
208 if(result != info->bmiHeader.biHeight) {
209 dprintf(("SetDIBitsToDevice failed with rc %x", result));
210 }
211 else
212 {
213 result = info->bmiHeader.biHeight;
214
215 DIBSection *destdib = DIBSection::findHDC(hdc);
216 if(destdib) {
217 if(cx == info->bmiHeader.biWidth && cy == info->bmiHeader.biHeight &&
218 destdib->GetBitCount() == info->bmiHeader.biBitCount &&
219 destdib->GetBitCount() == 8)
220 {
221 destdib->sync(xDest, yDest, cx, cy, (PVOID)bits);
222 }
223 else destdib->sync(hdc, yDest, cy);
224 }
225 }
226 dprintf(("GDI32: SetDIBitsToDevice hdc:%X xDest:%d yDest:%d, cx:%d, cy:%d, xSrc:%d, ySrc:%d, startscan:%d, lines:%d \nGDI32: bits 0x%X, info 0x%X, coloruse %d returned %d",
227 hdc, xDest, yDest, cx, cy, xSrc, ySrc, startscan, lines, (LPVOID) bits, (PBITMAPINFO)info, coloruse, result));
228 dprintf(("GDI32: SetDIBitsToDevice %d %d %d %d %x %d", info->bmiHeader.biWidth, info->bmiHeader.biHeight, info->bmiHeader.biPlanes, info->bmiHeader.biBitCount, info->bmiHeader.biCompression, info->bmiHeader.biSizeImage));
229
230 if(compression == BI_BITFIELDS) {
231 ((BITMAPINFO *)info)->bmiHeader.biCompression = BI_BITFIELDS;
232 }
233 if(newbits) free(newbits);
234
235 ((BITMAPINFO *)info)->bmiHeader.biSizeImage = bmpsize;
236 return result;
237
238invalid_parameter:
239 SetLastError(ERROR_INVALID_PARAMETER);
240 return 0;
241}
242//******************************************************************************
243//******************************************************************************
244INT WIN32API SetDIBitsToDevice(HDC hdc, INT xDest, INT yDest, DWORD cx,
245 DWORD cy, INT xSrc, INT ySrc,
246 UINT startscan, UINT lines, LPCVOID bits,
247 const BITMAPINFO *info, UINT coloruse)
248{
249 static BOOL fMatrox32BppBug = FALSE;
250 INT rc = 0;
251 char *newBits = NULL;
252
253 if(startscan != 0 || lines != abs(info->bmiHeader.biHeight)) {
254 dprintf(("WARNING: SetDIBitsToDevice: startscan != 0 || lines != abs(info->bmiHeader.biHeight"));
255 }
256
257 //If upside down, reverse scanlines and call SetDIBitsToDevice again
258// if(info->bmiHeader.biHeight < 0 && info->bmiHeader.biBitCount != 8 && info->bmiHeader.biCompression == 0) {
259 if(info->bmiHeader.biHeight < 0 && (info->bmiHeader.biCompression == BI_RGB ||
260 info->bmiHeader.biCompression == BI_BITFIELDS))
261 {
262 // upside down
263 INT rc = -1;
264 long lLineByte = DIB_GetDIBWidthBytes(info->bmiHeader.biWidth, info->bmiHeader.biBitCount);
265 long lHeight = -info->bmiHeader.biHeight;
266
267 //TODO: doesn't work if memory is readonly!!
268 ((BITMAPINFO *)info)->bmiHeader.biHeight = -info->bmiHeader.biHeight;
269
270 char *newBits = (char *)malloc( lLineByte * lHeight );
271 if(newBits) {
272 unsigned char *pbSrc = (unsigned char *)bits + xSrc + lLineByte * (ySrc + lHeight - 1);
273 unsigned char *pbDst = (unsigned char *)newBits;
274 for(int y = 0; y < lHeight; y++) {
275 memcpy( pbDst, pbSrc, lLineByte );
276 pbDst += lLineByte;
277 pbSrc -= lLineByte;
278 }
279 //We only convert the necessary data so xSrc & ySrc are now 0
280 rc = SetDIBitsToDevice( hdc, xDest, yDest, cx, cy, 0, 0, startscan, lines, (void *)newBits, info, coloruse );
281 free( newBits );
282 }
283 else DebugInt3();
284
285 //TODO: doesn't work if memory is readonly!!
286 ((BITMAPINFO *)info)->bmiHeader.biHeight = -info->bmiHeader.biHeight;
287
288 return rc;
289 }
290
291 //We must convert 32 bpp bitmap data to 24 bpp on systems with the Matrox
292 //display driver. (GpiDrawBits for 32 bpp fails with insufficient memory error)
293 if(info->bmiHeader.biBitCount == 32 && fMatrox32BppBug)
294 {
295 BITMAPINFO newInfo;
296 newInfo.bmiHeader = info->bmiHeader;
297
298 long lLineWidth;
299 long lHeight = (newInfo.bmiHeader.biHeight > 0) ? newInfo.bmiHeader.biHeight : -newInfo.bmiHeader.biHeight;
300 long lWidth = newInfo.bmiHeader.biWidth;
301
302 newInfo.bmiHeader.biBitCount = 24;
303 newInfo.bmiHeader.biSizeImage = CalcBitmapSize(24, newInfo.bmiHeader.biWidth,
304 newInfo.bmiHeader.biHeight);
305
306 lLineWidth = newInfo.bmiHeader.biSizeImage / lHeight;
307
308 //convert 32 bits bitmap data to 24 bits
309 newBits = (char *)malloc(newInfo.bmiHeader.biSizeImage+16); //extra room needed for copying (too much)
310 if(!newBits) {
311 DebugInt3();
312 return -1;
313 }
314 unsigned char *pbSrc = (unsigned char *)bits;
315 unsigned char *pbDst = (unsigned char *)newBits;
316 //not very efficient
317 for(int i = 0; i < lHeight; i++) {
318 for(int j=0;j<lWidth;j++) {
319 *(DWORD *)pbDst = *(DWORD *)pbSrc;
320 pbSrc += 4;
321 pbDst += 3;
322 }
323 //24 bpp scanline must be aligned at 4 byte boundary
324 pbDst += (lLineWidth - 3*lWidth);
325 }
326 rc = SetDIBitsToDevice_( hdc, xDest, yDest, cx, cy, xSrc, ySrc, startscan, lines, newBits, &newInfo, coloruse );
327 free(newBits);
328 return rc;
329 }
330 rc = SetDIBitsToDevice_( hdc, xDest, yDest, cx, cy, xSrc, ySrc, startscan, lines, bits, info, coloruse );
331
332 if(rc == -1 && info->bmiHeader.biBitCount == 32 && !fMatrox32BppBug)
333 {
334 //The Matrox driver seems to have some difficulty blitting 32bpp
335 //data. (out of memory error) The same operation works fine with SDD.
336 fMatrox32BppBug = TRUE;
337 return SetDIBitsToDevice(hdc, xDest, yDest, cx,
338 cy, xSrc, ySrc,
339 startscan, lines, bits,
340 info, coloruse);
341 }
342 return rc;
343}
344//******************************************************************************
345//******************************************************************************
346BOOL WIN32API PatBlt(HDC hdc,int nXLeft,int nYLeft,int nWidth,int nHeight,DWORD dwRop)
347{
348 BOOL rc;
349
350 dprintf(("PatBlt %x (%d,%d)(%d,%d) %x", hdc, nXLeft,nYLeft,nWidth,nHeight, dwRop));
351 //CB: Open32 bug: negative width/height not supported!
352 if (nWidth < 0)
353 {
354 nXLeft += nWidth+1;
355 nWidth = -nWidth;
356 }
357 if (nHeight < 0)
358 {
359 nYLeft += nHeight+1;
360 nHeight = -nHeight;
361 }
362 rc = O32_PatBlt(hdc,nXLeft,nYLeft,nWidth,nHeight,dwRop);
363 if(rc) {
364 DIBSection *destdib = DIBSection::findHDC(hdc);
365 if(destdib) {
366 destdib->sync(hdc, nYLeft, nHeight);
367 }
368 }
369 return(rc);
370}
371//******************************************************************************
372//******************************************************************************
373BOOL WIN32API MaskBlt( HDC arg1, int arg2, int arg3, int arg4, int arg5, HDC arg6, int arg7, int arg8, HBITMAP arg9, int arg10, int arg11, DWORD arg12)
374{
375 return O32_MaskBlt(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11, arg12);
376}
377//******************************************************************************
378//******************************************************************************
379BOOL WIN32API PlgBlt(HDC hdcDest, CONST POINT *lpPoint, HDC hdcSrc, int nXSrc,
380 int nYSrc, int nWidth, int nHeight, HBITMAP hbmMask,
381 int xMast, int yMask)
382{
383 dprintf(("GDI32: PlgBlt, not implemented\n"));
384 return(FALSE);
385}
386//******************************************************************************
387//******************************************************************************
388static INT StretchDIBits_(HDC hdc, INT xDst, INT yDst, INT widthDst,
389 INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
390 INT heightSrc, const void *bits,
391 const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
392{
393 INT rc;
394 DWORD bitfields[3], compression = 0;
395 WORD *newbits = NULL;
396
397 dprintf(("GDI32: StretchDIBits %x to (%d,%d) (%d,%d) from (%d,%d) (%d,%d), %x %x %x %x", hdc, xDst, yDst, widthDst, heightDst, xSrc, ySrc, widthSrc, heightSrc, bits, info, wUsage, dwRop));
398
399 if(info->bmiHeader.biBitCount == 1) {
400 dprintf(("WARNING: StretchDIBits does NOT work correctly for 1 bpp bitmaps!!"));
401 }
402
403 if(wUsage == DIB_PAL_COLORS && info->bmiHeader.biSize == sizeof(BITMAPINFOHEADER))
404 {
405 // workaround for open32 bug.
406 // If syscolors > 256 and wUsage == DIB_PAL_COLORS.
407
408 int i;
409 USHORT *pColorIndex = (USHORT *)info->bmiColors;
410 RGBQUAD *pColors = (RGBQUAD *) alloca(info->bmiHeader.biClrUsed *
411 sizeof(RGBQUAD));
412 BITMAPINFO *infoLoc = (BITMAPINFO *) alloca(sizeof(BITMAPINFO) +
413 info->bmiHeader.biClrUsed * sizeof(RGBQUAD));
414
415 memcpy(infoLoc, info, sizeof(BITMAPINFO));
416
417 if(GetDIBColorTable(hdc, 0, info->bmiHeader.biClrUsed, pColors) == 0) {
418 dprintf(("ERROR: StretchDIBits: GetDIBColorTable failed!!"));
419 return FALSE;
420 }
421 for(i=0;i<info->bmiHeader.biClrUsed;i++, pColorIndex++)
422 {
423 infoLoc->bmiColors[i] = pColors[*pColorIndex];
424 }
425
426 rc = O32_StretchDIBits(hdc, xDst, yDst, widthDst, heightDst, xSrc, ySrc,
427 widthSrc, heightSrc, (void *)bits,
428 (PBITMAPINFO)infoLoc, DIB_RGB_COLORS, dwRop);
429
430 //Open32 always returns height of bitmap (regardless of how many scanlines were copied)
431 if(rc != heightSrc && rc != infoLoc->bmiHeader.biHeight) {
432 dprintf(("StretchDIBits failed with rc %x", rc));
433 }
434 else {
435 rc = heightSrc;
436
437 DIBSection *destdib = DIBSection::findHDC(hdc);
438 if(destdib) {
439 if(widthDst == widthSrc && heightDst == heightSrc &&
440 destdib->GetBitCount() == infoLoc->bmiHeader.biBitCount &&
441 destdib->GetBitCount() == 8)
442 {
443 destdib->sync(xDst, yDst, widthDst, heightDst, (PVOID)bits);
444 }
445 else destdib->sync(hdc, yDst, heightDst);
446 }
447 }
448
449 return rc;
450 }
451
452 switch(info->bmiHeader.biBitCount) {
453 case 15:
454 case 16: //Default if BI_BITFIELDS not set is RGB 555
455 bitfields[0] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *(DWORD *)info->bmiColors : DEFAULT_16BPP_RED_MASK;
456 bitfields[1] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *((DWORD *)info->bmiColors + 1) : DEFAULT_16BPP_GREEN_MASK;
457 bitfields[2] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *((DWORD *)info->bmiColors + 2) : DEFAULT_16BPP_BLUE_MASK;
458 break;
459 case 24:
460 case 32:
461 bitfields[0] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *(DWORD *)info->bmiColors : DEFAULT_24BPP_RED_MASK;
462 bitfields[1] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *((DWORD *)info->bmiColors + 1) : DEFAULT_24BPP_GREEN_MASK;
463 bitfields[2] = (info->bmiHeader.biCompression == BI_BITFIELDS) ? *((DWORD *)info->bmiColors + 2) : DEFAULT_24BPP_BLUE_MASK;
464 break;
465 default:
466 bitfields[0] = 0;
467 bitfields[1] = 0;
468 bitfields[2] = 0;
469 break;
470 }
471 if(bitfields[1] == RGB555_GREEN_MASK)
472 {//RGB 555?
473 dprintf(("RGB 555->565 conversion required %x %x %x", bitfields[0], bitfields[1], bitfields[2]));
474
475 ULONG imgsize = CalcBitmapSize(info->bmiHeader.biBitCount,
476 widthSrc, heightSrc);
477 ULONG offset = CalcBitmapSize(info->bmiHeader.biBitCount,
478 xSrc, ySrc)/sizeof(WORD);
479 newbits = (WORD *) HeapAlloc(GetProcessHeap(), 0, imgsize);
480//bugbug (too much)
481//bugbug
482 if(CPUFeatures & CPUID_MMX) {
483 RGB555to565MMX(newbits, (WORD *)bits+offset, imgsize/sizeof(WORD));
484 }
485 else
486 RGB555to565(newbits, (WORD *)bits+offset, imgsize/sizeof(WORD));
487 bits = newbits;
488 }
489 //SvL: Ignore BI_BITFIELDS type (StretchDIBits fails otherwise)
490 if(info->bmiHeader.biCompression == BI_BITFIELDS) {
491 ((BITMAPINFO *)info)->bmiHeader.biCompression = 0;
492 compression = BI_BITFIELDS;
493 }
494
495 rc = O32_StretchDIBits(hdc, xDst, yDst, widthDst, heightDst, xSrc, ySrc,
496 widthSrc, heightSrc, (void *)bits,
497 (PBITMAPINFO)info, wUsage, dwRop);
498
499 if(compression == BI_BITFIELDS) {
500 ((BITMAPINFO *)info)->bmiHeader.biCompression = BI_BITFIELDS;
501 }
502 if(newbits) HeapFree(GetProcessHeap(), 0, newbits);
503
504 //Open32 always returns height of bitmap (regardless of how many scanlines were copied)
505 if(rc != heightSrc && rc != info->bmiHeader.biHeight) {
506 dprintf(("StretchDIBits failed with rc %x", rc));
507 }
508 else
509 {
510 rc = heightSrc;
511
512 DIBSection *destdib = DIBSection::findHDC(hdc);
513 if(destdib) {
514 if(widthDst == widthSrc && heightDst == heightSrc &&
515 destdib->GetBitCount() == info->bmiHeader.biBitCount &&
516 destdib->GetBitCount() == 8)
517 {
518 destdib->sync(xDst, yDst, widthDst, heightDst, (PVOID)bits);
519 }
520 else destdib->sync(hdc, yDst, heightDst);
521 }
522 }
523
524 return rc;
525}
526//******************************************************************************
527//******************************************************************************
528INT WIN32API StretchDIBits(HDC hdc, INT xDst, INT yDst, INT widthDst,
529 INT heightDst, INT xSrc, INT ySrc, INT widthSrc,
530 INT heightSrc, const void *bits,
531 const BITMAPINFO *info, UINT wUsage, DWORD dwRop )
532{
533
534 if(info->bmiHeader.biHeight < 0) {
535 // upside down
536 INT rc = 0;
537 BITMAPINFO newInfo;
538 newInfo.bmiHeader = info->bmiHeader;
539 long lLineByte = ((newInfo.bmiHeader.biWidth * (info->bmiHeader.biBitCount == 15 ? 16 : info->bmiHeader.biBitCount) + 31) / 32) * 4;
540 long lHeight = -newInfo.bmiHeader.biHeight;
541 newInfo.bmiHeader.biHeight = -newInfo.bmiHeader.biHeight;
542
543 //TODO: doesn't work if memory is readonly!!
544 ((BITMAPINFO *)info)->bmiHeader.biHeight = -info->bmiHeader.biHeight;
545
546 char *newBits = (char *)malloc( lLineByte * lHeight );
547 if(newBits) {
548 unsigned char *pbSrc = (unsigned char *)bits + lLineByte * (lHeight - 1);
549 unsigned char *pbDst = (unsigned char *)newBits;
550 for(int y = 0; y < lHeight; y++) {
551 memcpy( pbDst, pbSrc, lLineByte );
552 pbDst += lLineByte;
553 pbSrc -= lLineByte;
554 }
555 rc = StretchDIBits_(hdc, xDst, yDst, widthDst, heightDst, xSrc, ySrc, widthSrc, heightSrc, newBits, info, wUsage, dwRop);
556 free( newBits );
557 }
558
559 //TODO: doesn't work if memory is readonly!!
560 ((BITMAPINFO *)info)->bmiHeader.biHeight = -info->bmiHeader.biHeight;
561 return rc;
562 } else {
563 return StretchDIBits_(hdc, xDst, yDst, widthDst, heightDst, xSrc, ySrc, widthSrc, heightSrc, bits, info, wUsage, dwRop);
564 }
565}
566//******************************************************************************
567//******************************************************************************
568int WIN32API SetStretchBltMode( HDC arg1, int arg2)
569{
570 if(DIBSection::getSection() != NULL)
571 {
572 DIBSection *dsect = DIBSection::findHDC(arg1);
573 if(dsect)
574 {
575 dprintf((" - DC is DIBSection\n"));
576 }
577 }
578 return O32_SetStretchBltMode(arg1, arg2);
579}
580//******************************************************************************
581//******************************************************************************
582int WIN32API GetStretchBltMode( HDC arg1)
583{
584 return O32_GetStretchBltMode(arg1);
585}
586//******************************************************************************
587//******************************************************************************
588static ULONG QueryPaletteSize(BITMAPINFOHEADER *pBHdr)
589{
590 ULONG cbPalette;
591
592 switch (pBHdr->biBitCount)
593 {
594 case 1:
595 case 4:
596 case 8:
597 cbPalette = (1 << pBHdr->biBitCount) * sizeof(RGBQUAD);
598 break;
599
600 case 16:
601 case 24:
602 case 32:
603 cbPalette = 0;
604 break;
605
606 default:
607 dprintf(("QueryPaletteSize: error pBHdr->biBitCount = %d", pBHdr->biBitCount));
608 cbPalette = -1;
609 }
610
611 return cbPalette;
612}
613//******************************************************************************
614//******************************************************************************
615ULONG CalcBitmapSize(ULONG cBits, LONG cx, LONG cy)
616{
617 ULONG alignment;
618 ULONG factor;
619 BOOL flag = TRUE; //true: '*' false: '/'
620
621 cy = cy < 0 ? -cy : cy;
622
623 switch(cBits)
624 {
625 case 1:
626 factor = 8;
627 flag = FALSE;
628 break;
629
630 case 4:
631 factor = 2;
632 flag = FALSE;
633 break;
634
635 case 8:
636 factor = 1;
637 break;
638
639 case 16:
640 factor = 2;
641 break;
642
643 case 24:
644 factor = 3;
645 break;
646
647 case 32:
648 return cx*cy*4;
649
650 default:
651 return 0;
652 }
653
654 if (flag)
655 alignment = (cx = (cx*factor)) % 4;
656 else
657 alignment = (cx = ((cx+factor-1)/factor)) % 4;
658
659 if (alignment != 0)
660 cx += 4 - alignment;
661
662 return cx*cy;
663}
664//******************************************************************************
665//******************************************************************************
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