1 /*
2 * Mesa 3-D graphics library
3 * Version: 6.5.2
4 *
5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26 /**
27 * \file xm_dd.h
28 * General device driver functions for Xlib driver.
29 */
30
31 #include "glxheader.h"
32 #include "main/bufferobj.h"
33 #include "main/context.h"
34 #include "main/colormac.h"
35 #include "main/fbobject.h"
36 #include "main/macros.h"
37 #include "main/mipmap.h"
38 #include "main/image.h"
39 #include "main/imports.h"
40 #include "main/mtypes.h"
41 #include "main/pbo.h"
42 #include "main/texformat.h"
43 #include "swrast/swrast.h"
44 #include "swrast/s_context.h"
45 #include "swrast_setup/swrast_setup.h"
46 #include "tnl/tnl.h"
47 #include "tnl/t_context.h"
48 #include "drivers/common/meta.h"
49 #include "xmesaP.h"
50
51
52 static void
finish_or_flush(struct gl_context * ctx)53 finish_or_flush( struct gl_context *ctx )
54 {
55 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
56 if (xmesa) {
57 _glthread_LOCK_MUTEX(_xmesa_lock);
58 XSync( xmesa->display, False );
59 _glthread_UNLOCK_MUTEX(_xmesa_lock);
60 }
61 }
62
63
64 /* Implements glColorMask() */
65 static void
color_mask(struct gl_context * ctx,GLboolean rmask,GLboolean gmask,GLboolean bmask,GLboolean amask)66 color_mask(struct gl_context *ctx,
67 GLboolean rmask, GLboolean gmask, GLboolean bmask, GLboolean amask)
68 {
69 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
70 XMesaBuffer xmbuf;
71 const int xclass = xmesa->xm_visual->visualType;
72 (void) amask;
73
74 if (_mesa_is_user_fbo(ctx->DrawBuffer))
75 return;
76
77 xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
78
79 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
80 unsigned long m;
81 if (rmask && gmask && bmask) {
82 m = ((unsigned long)~0L);
83 }
84 else {
85 m = 0;
86 if (rmask) m |= GET_REDMASK(xmesa->xm_visual);
87 if (gmask) m |= GET_GREENMASK(xmesa->xm_visual);
88 if (bmask) m |= GET_BLUEMASK(xmesa->xm_visual);
89 }
90 XMesaSetPlaneMask( xmesa->display, xmbuf->cleargc, m );
91 }
92 }
93
94
95
96 /**********************************************************************/
97 /*** glClear implementations ***/
98 /**********************************************************************/
99
100
101 /**
102 * Clear the front or back color buffer, if it's implemented with a pixmap.
103 */
104 static void
clear_pixmap(struct gl_context * ctx,struct xmesa_renderbuffer * xrb,GLint x,GLint y,GLint width,GLint height)105 clear_pixmap(struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
106 GLint x, GLint y, GLint width, GLint height)
107 {
108 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
109 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
110
111 assert(xmbuf);
112 assert(xrb->pixmap);
113 assert(xmesa);
114 assert(xmesa->display);
115 assert(xrb->pixmap);
116 assert(xmbuf->cleargc);
117
118 XMesaFillRectangle( xmesa->display, xrb->pixmap, xmbuf->cleargc,
119 x, xrb->Base.Base.Height - y - height,
120 width, height );
121 }
122
123
124 static void
clear_16bit_ximage(struct gl_context * ctx,struct xmesa_renderbuffer * xrb,GLint x,GLint y,GLint width,GLint height)125 clear_16bit_ximage( struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
126 GLint x, GLint y, GLint width, GLint height)
127 {
128 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
129 GLuint pixel = (GLuint) xmesa->clearpixel;
130 GLint i, j;
131
132 if (xmesa->swapbytes) {
133 pixel = ((pixel >> 8) & 0x00ff) | ((pixel << 8) & 0xff00);
134 }
135
136 for (j = 0; j < height; j++) {
137 GLushort *ptr2 = PIXEL_ADDR2(xrb, x, y + j);
138 for (i = 0; i < width; i++) {
139 ptr2[i] = pixel;
140 }
141 }
142 }
143
144
145 /* Optimized code provided by Nozomi Ytow <noz@xfree86.org> */
146 static void
clear_24bit_ximage(struct gl_context * ctx,struct xmesa_renderbuffer * xrb,GLint x,GLint y,GLint width,GLint height)147 clear_24bit_ximage(struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
148 GLint x, GLint y, GLint width, GLint height)
149 {
150 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
151 const GLubyte r = xmesa->clearcolor[0];
152 const GLubyte g = xmesa->clearcolor[1];
153 const GLubyte b = xmesa->clearcolor[2];
154
155 if (r == g && g == b) {
156 /* same value for all three components (gray) */
157 GLint j;
158 for (j = 0; j < height; j++) {
159 bgr_t *ptr3 = PIXEL_ADDR3(xrb, x, y + j);
160 memset(ptr3, r, 3 * width);
161 }
162 }
163 else {
164 /* non-gray clear color */
165 GLint i, j;
166 for (j = 0; j < height; j++) {
167 bgr_t *ptr3 = PIXEL_ADDR3(xrb, x, y + j);
168 for (i = 0; i < width; i++) {
169 ptr3->r = r;
170 ptr3->g = g;
171 ptr3->b = b;
172 ptr3++;
173 }
174 }
175 }
176 }
177
178
179 static void
clear_32bit_ximage(struct gl_context * ctx,struct xmesa_renderbuffer * xrb,GLint x,GLint y,GLint width,GLint height)180 clear_32bit_ximage(struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
181 GLint x, GLint y, GLint width, GLint height)
182 {
183 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
184 register GLuint pixel = (GLuint) xmesa->clearpixel;
185
186 if (!xrb->ximage)
187 return;
188
189 if (xmesa->swapbytes) {
190 pixel = ((pixel >> 24) & 0x000000ff)
191 | ((pixel >> 8) & 0x0000ff00)
192 | ((pixel << 8) & 0x00ff0000)
193 | ((pixel << 24) & 0xff000000);
194 }
195
196 if (width == xrb->Base.Base.Width && height == xrb->Base.Base.Height) {
197 /* clearing whole buffer */
198 const GLuint n = xrb->Base.Base.Width * xrb->Base.Base.Height;
199 GLuint *ptr4 = (GLuint *) xrb->ximage->data;
200 if (pixel == 0) {
201 /* common case */
202 memset(ptr4, pixel, 4 * n);
203 }
204 else {
205 GLuint i;
206 for (i = 0; i < n; i++)
207 ptr4[i] = pixel;
208 }
209 }
210 else {
211 /* clearing scissored region */
212 GLint i, j;
213 for (j = 0; j < height; j++) {
214 GLuint *ptr4 = PIXEL_ADDR4(xrb, x, y + j);
215 for (i = 0; i < width; i++) {
216 ptr4[i] = pixel;
217 }
218 }
219 }
220 }
221
222
223 static void
clear_nbit_ximage(struct gl_context * ctx,struct xmesa_renderbuffer * xrb,GLint x,GLint y,GLint width,GLint height)224 clear_nbit_ximage(struct gl_context *ctx, struct xmesa_renderbuffer *xrb,
225 GLint x, GLint y, GLint width, GLint height)
226 {
227 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
228 XMesaImage *img = xrb->ximage;
229 GLint i, j;
230
231 /* TODO: optimize this */
232 y = YFLIP(xrb, y);
233 for (j = 0; j < height; j++) {
234 for (i = 0; i < width; i++) {
235 XMesaPutPixel(img, x+i, y-j, xmesa->clearpixel);
236 }
237 }
238 }
239
240
241
242 static void
clear_buffers(struct gl_context * ctx,GLbitfield buffers)243 clear_buffers(struct gl_context *ctx, GLbitfield buffers)
244 {
245 if (_mesa_is_winsys_fbo(ctx->DrawBuffer)) {
246 /* this is a window system framebuffer */
247 const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask[0];
248 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
249 XMesaBuffer b = XMESA_BUFFER(ctx->DrawBuffer);
250 const GLint x = ctx->DrawBuffer->_Xmin;
251 const GLint y = ctx->DrawBuffer->_Ymin;
252 const GLint width = ctx->DrawBuffer->_Xmax - x;
253 const GLint height = ctx->DrawBuffer->_Ymax - y;
254
255 _mesa_unclamped_float_rgba_to_ubyte(xmesa->clearcolor,
256 ctx->Color.ClearColor.f);
257 xmesa->clearpixel = xmesa_color_to_pixel(ctx,
258 xmesa->clearcolor[0],
259 xmesa->clearcolor[1],
260 xmesa->clearcolor[2],
261 xmesa->clearcolor[3],
262 xmesa->xm_visual->undithered_pf);
263 XMesaSetForeground(xmesa->display, b->cleargc, xmesa->clearpixel);
264
265 /* we can't handle color or index masking */
266 if (*colorMask == 0xffffffff && ctx->Color.IndexMask == 0xffffffff) {
267 if (buffers & BUFFER_BIT_FRONT_LEFT) {
268 /* clear front color buffer */
269 struct gl_renderbuffer *frontRb
270 = ctx->DrawBuffer->Attachment[BUFFER_FRONT_LEFT].Renderbuffer;
271 if (b->frontxrb == xmesa_renderbuffer(frontRb)) {
272 /* renderbuffer is not wrapped - great! */
273 b->frontxrb->clearFunc(ctx, b->frontxrb, x, y, width, height);
274 buffers &= ~BUFFER_BIT_FRONT_LEFT;
275 }
276 else {
277 /* we can't directly clear an alpha-wrapped color buffer */
278 }
279 }
280 if (buffers & BUFFER_BIT_BACK_LEFT) {
281 /* clear back color buffer */
282 struct gl_renderbuffer *backRb
283 = ctx->DrawBuffer->Attachment[BUFFER_BACK_LEFT].Renderbuffer;
284 if (b->backxrb == xmesa_renderbuffer(backRb)) {
285 /* renderbuffer is not wrapped - great! */
286 b->backxrb->clearFunc(ctx, b->backxrb, x, y, width, height);
287 buffers &= ~BUFFER_BIT_BACK_LEFT;
288 }
289 }
290 }
291 }
292 if (buffers)
293 _swrast_Clear(ctx, buffers);
294 }
295
296
297 /* XXX these functions haven't been tested in the Xserver environment */
298
299
300 /**
301 * Check if we can do an optimized glDrawPixels into an 8R8G8B visual.
302 */
303 static GLboolean
can_do_DrawPixels_8R8G8B(struct gl_context * ctx,GLenum format,GLenum type)304 can_do_DrawPixels_8R8G8B(struct gl_context *ctx, GLenum format, GLenum type)
305 {
306 if (format == GL_BGRA &&
307 type == GL_UNSIGNED_BYTE &&
308 ctx->DrawBuffer &&
309 _mesa_is_winsys_fbo(ctx->DrawBuffer) &&
310 ctx->Pixel.ZoomX == 1.0 && /* no zooming */
311 ctx->Pixel.ZoomY == 1.0 &&
312 ctx->_ImageTransferState == 0 /* no color tables, scale/bias, etc */) {
313 const SWcontext *swrast = SWRAST_CONTEXT(ctx);
314
315 if (swrast->NewState)
316 _swrast_validate_derived( ctx );
317
318 if ((swrast->_RasterMask & ~CLIP_BIT) == 0) /* no blend, z-test, etc */ {
319 struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
320 if (rb) {
321 struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
322 if (xrb &&
323 xrb->pixmap && /* drawing to pixmap or window */
324 _mesa_get_format_bits(xrb->Base.Base.Format, GL_ALPHA_BITS) == 0) {
325 return GL_TRUE;
326 }
327 }
328 }
329 }
330 return GL_FALSE;
331 }
332
333
334 /**
335 * This function implements glDrawPixels() with an XPutImage call when
336 * drawing to the front buffer (X Window drawable).
337 * The image format must be GL_BGRA to match the PF_8R8G8B pixel format.
338 */
339 static void
xmesa_DrawPixels_8R8G8B(struct gl_context * ctx,GLint x,GLint y,GLsizei width,GLsizei height,GLenum format,GLenum type,const struct gl_pixelstore_attrib * unpack,const GLvoid * pixels)340 xmesa_DrawPixels_8R8G8B( struct gl_context *ctx,
341 GLint x, GLint y, GLsizei width, GLsizei height,
342 GLenum format, GLenum type,
343 const struct gl_pixelstore_attrib *unpack,
344 const GLvoid *pixels )
345 {
346 if (can_do_DrawPixels_8R8G8B(ctx, format, type)) {
347 const SWcontext *swrast = SWRAST_CONTEXT( ctx );
348 struct gl_pixelstore_attrib clippedUnpack = *unpack;
349 int dstX = x;
350 int dstY = y;
351 int w = width;
352 int h = height;
353
354 if (swrast->NewState)
355 _swrast_validate_derived( ctx );
356
357 if (_mesa_is_bufferobj(unpack->BufferObj)) {
358 /* unpack from PBO */
359 GLubyte *buf;
360 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
361 format, type, INT_MAX, pixels)) {
362 _mesa_error(ctx, GL_INVALID_OPERATION,
363 "glDrawPixels(invalid PBO access)");
364 return;
365 }
366 buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0,
367 unpack->BufferObj->Size,
368 GL_MAP_READ_BIT,
369 unpack->BufferObj);
370 if (!buf) {
371 /* buffer is already mapped - that's an error */
372 _mesa_error(ctx, GL_INVALID_OPERATION,
373 "glDrawPixels(PBO is mapped)");
374 return;
375 }
376 pixels = ADD_POINTERS(buf, pixels);
377 }
378
379 if (_mesa_clip_drawpixels(ctx, &dstX, &dstY, &w, &h, &clippedUnpack)) {
380 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
381 XMesaDisplay *dpy = xmesa->xm_visual->display;
382 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
383 const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
384 struct xmesa_renderbuffer *xrb
385 = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
386 const int srcX = clippedUnpack.SkipPixels;
387 const int srcY = clippedUnpack.SkipRows;
388 const int rowLength = clippedUnpack.RowLength;
389 XMesaImage ximage;
390
391 ASSERT(xmesa->xm_visual->dithered_pf == PF_8R8G8B);
392 ASSERT(xmesa->xm_visual->undithered_pf == PF_8R8G8B);
393 ASSERT(dpy);
394 ASSERT(gc);
395
396 /* This is a little tricky since all coordinates up to now have
397 * been in the OpenGL bottom-to-top orientation. X is top-to-bottom
398 * so we have to carefully compute the Y coordinates/addresses here.
399 */
400 memset(&ximage, 0, sizeof(XMesaImage));
401 ximage.width = width;
402 ximage.height = height;
403 ximage.format = ZPixmap;
404 ximage.data = (char *) pixels
405 + ((srcY + h - 1) * rowLength + srcX) * 4;
406 ximage.byte_order = LSBFirst;
407 ximage.bitmap_unit = 32;
408 ximage.bitmap_bit_order = LSBFirst;
409 ximage.bitmap_pad = 32;
410 ximage.depth = 32;
411 ximage.bits_per_pixel = 32;
412 ximage.bytes_per_line = -rowLength * 4; /* negative to flip image */
413 /* it seems we don't need to set the ximage.red/green/blue_mask fields */
414 /* flip Y axis for dest position */
415 dstY = YFLIP(xrb, dstY) - h + 1;
416 XPutImage(dpy, xrb->pixmap, gc, &ximage, 0, 0, dstX, dstY, w, h);
417 }
418
419 if (_mesa_is_bufferobj(unpack->BufferObj)) {
420 ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj);
421 }
422 }
423 else {
424 /* software fallback */
425 _swrast_DrawPixels(ctx, x, y, width, height,
426 format, type, unpack, pixels);
427 }
428 }
429
430
431
432 /**
433 * Check if we can do an optimized glDrawPixels into an 5R6G5B visual.
434 */
435 static GLboolean
can_do_DrawPixels_5R6G5B(struct gl_context * ctx,GLenum format,GLenum type)436 can_do_DrawPixels_5R6G5B(struct gl_context *ctx, GLenum format, GLenum type)
437 {
438 if (format == GL_RGB &&
439 type == GL_UNSIGNED_SHORT_5_6_5 &&
440 !ctx->Color.DitherFlag && /* no dithering */
441 ctx->DrawBuffer &&
442 _mesa_is_winsys_fbo(ctx->DrawBuffer) &&
443 ctx->Pixel.ZoomX == 1.0 && /* no zooming */
444 ctx->Pixel.ZoomY == 1.0 &&
445 ctx->_ImageTransferState == 0 /* no color tables, scale/bias, etc */) {
446 const SWcontext *swrast = SWRAST_CONTEXT(ctx);
447
448 if (swrast->NewState)
449 _swrast_validate_derived( ctx );
450
451 if ((swrast->_RasterMask & ~CLIP_BIT) == 0) /* no blend, z-test, etc */ {
452 struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
453 if (rb) {
454 struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
455 if (xrb &&
456 xrb->pixmap && /* drawing to pixmap or window */
457 _mesa_get_format_bits(xrb->Base.Base.Format, GL_ALPHA_BITS) == 0) {
458 return GL_TRUE;
459 }
460 }
461 }
462 }
463 return GL_FALSE;
464 }
465
466
467 /**
468 * This function implements glDrawPixels() with an XPutImage call when
469 * drawing to the front buffer (X Window drawable). The image format
470 * must be GL_RGB and image type must be GL_UNSIGNED_SHORT_5_6_5 to
471 * match the PF_5R6G5B pixel format.
472 */
473 static void
xmesa_DrawPixels_5R6G5B(struct gl_context * ctx,GLint x,GLint y,GLsizei width,GLsizei height,GLenum format,GLenum type,const struct gl_pixelstore_attrib * unpack,const GLvoid * pixels)474 xmesa_DrawPixels_5R6G5B( struct gl_context *ctx,
475 GLint x, GLint y, GLsizei width, GLsizei height,
476 GLenum format, GLenum type,
477 const struct gl_pixelstore_attrib *unpack,
478 const GLvoid *pixels )
479 {
480 if (can_do_DrawPixels_5R6G5B(ctx, format, type)) {
481 const SWcontext *swrast = SWRAST_CONTEXT( ctx );
482 struct gl_pixelstore_attrib clippedUnpack = *unpack;
483 int dstX = x;
484 int dstY = y;
485 int w = width;
486 int h = height;
487
488 if (swrast->NewState)
489 _swrast_validate_derived( ctx );
490
491 if (_mesa_is_bufferobj(unpack->BufferObj)) {
492 /* unpack from PBO */
493 GLubyte *buf;
494 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
495 format, type, INT_MAX, pixels)) {
496 _mesa_error(ctx, GL_INVALID_OPERATION,
497 "glDrawPixels(invalid PBO access)");
498 return;
499 }
500 buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0,
501 unpack->BufferObj->Size,
502 GL_MAP_READ_BIT,
503 unpack->BufferObj);
504 if (!buf) {
505 /* buffer is already mapped - that's an error */
506 _mesa_error(ctx, GL_INVALID_OPERATION,
507 "glDrawPixels(PBO is mapped)");
508 return;
509 }
510 pixels = ADD_POINTERS(buf, pixels);
511 }
512
513 if (_mesa_clip_drawpixels(ctx, &dstX, &dstY, &w, &h, &clippedUnpack)) {
514 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
515 XMesaDisplay *dpy = xmesa->xm_visual->display;
516 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
517 const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
518 struct xmesa_renderbuffer *xrb
519 = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
520 const int srcX = clippedUnpack.SkipPixels;
521 const int srcY = clippedUnpack.SkipRows;
522 const int rowLength = clippedUnpack.RowLength;
523 XMesaImage ximage;
524
525 ASSERT(xmesa->xm_visual->undithered_pf == PF_5R6G5B);
526 ASSERT(dpy);
527 ASSERT(gc);
528
529 /* This is a little tricky since all coordinates up to now have
530 * been in the OpenGL bottom-to-top orientation. X is top-to-bottom
531 * so we have to carefully compute the Y coordinates/addresses here.
532 */
533 memset(&ximage, 0, sizeof(XMesaImage));
534 ximage.width = width;
535 ximage.height = height;
536 ximage.format = ZPixmap;
537 ximage.data = (char *) pixels
538 + ((srcY + h - 1) * rowLength + srcX) * 2;
539 ximage.byte_order = LSBFirst;
540 ximage.bitmap_unit = 16;
541 ximage.bitmap_bit_order = LSBFirst;
542 ximage.bitmap_pad = 16;
543 ximage.depth = 16;
544 ximage.bits_per_pixel = 16;
545 ximage.bytes_per_line = -rowLength * 2; /* negative to flip image */
546 /* it seems we don't need to set the ximage.red/green/blue_mask fields */
547 /* flip Y axis for dest position */
548 dstY = YFLIP(xrb, dstY) - h + 1;
549 XPutImage(dpy, xrb->pixmap, gc, &ximage, 0, 0, dstX, dstY, w, h);
550 }
551
552 if (unpack->BufferObj->Name) {
553 ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj);
554 }
555 }
556 else {
557 /* software fallback */
558 _swrast_DrawPixels(ctx, x, y, width, height,
559 format, type, unpack, pixels);
560 }
561 }
562
563
564 /**
565 * Determine if we can do an optimized glCopyPixels.
566 */
567 static GLboolean
can_do_CopyPixels(struct gl_context * ctx,GLenum type)568 can_do_CopyPixels(struct gl_context *ctx, GLenum type)
569 {
570 if (type == GL_COLOR &&
571 ctx->_ImageTransferState == 0 && /* no color tables, scale/bias, etc */
572 ctx->Pixel.ZoomX == 1.0 && /* no zooming */
573 ctx->Pixel.ZoomY == 1.0 &&
574 ctx->Color.DrawBuffer[0] == GL_FRONT && /* copy to front buf */
575 ctx->Pixel.ReadBuffer == GL_FRONT && /* copy from front buf */
576 ctx->ReadBuffer->_ColorReadBuffer &&
577 ctx->DrawBuffer->_ColorDrawBuffers[0]) {
578 const SWcontext *swrast = SWRAST_CONTEXT( ctx );
579
580 if (swrast->NewState)
581 _swrast_validate_derived( ctx );
582
583 if ((swrast->_RasterMask & ~CLIP_BIT) == 0x0 &&
584 ctx->ReadBuffer &&
585 ctx->ReadBuffer->_ColorReadBuffer &&
586 ctx->DrawBuffer &&
587 ctx->DrawBuffer->_ColorDrawBuffers[0]) {
588 struct xmesa_renderbuffer *srcXrb
589 = xmesa_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
590 struct xmesa_renderbuffer *dstXrb
591 = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
592 if (srcXrb->pixmap && dstXrb->pixmap) {
593 return GL_TRUE;
594 }
595 }
596 }
597 return GL_FALSE;
598 }
599
600
601 /**
602 * Implement glCopyPixels for the front color buffer (or back buffer Pixmap)
603 * for the color buffer. Don't support zooming, pixel transfer, etc.
604 * We do support copying from one window to another, ala glXMakeCurrentRead.
605 */
606 static void
xmesa_CopyPixels(struct gl_context * ctx,GLint srcx,GLint srcy,GLsizei width,GLsizei height,GLint destx,GLint desty,GLenum type)607 xmesa_CopyPixels( struct gl_context *ctx,
608 GLint srcx, GLint srcy, GLsizei width, GLsizei height,
609 GLint destx, GLint desty, GLenum type )
610 {
611 if (can_do_CopyPixels(ctx, type)) {
612 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
613 XMesaDisplay *dpy = xmesa->xm_visual->display;
614 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
615 const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
616 struct xmesa_renderbuffer *srcXrb
617 = xmesa_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
618 struct xmesa_renderbuffer *dstXrb
619 = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
620
621 ASSERT(dpy);
622 ASSERT(gc);
623
624 /* Note: we don't do any special clipping work here. We could,
625 * but X will do it for us.
626 */
627 srcy = YFLIP(srcXrb, srcy) - height + 1;
628 desty = YFLIP(dstXrb, desty) - height + 1;
629 XCopyArea(dpy, srcXrb->pixmap, dstXrb->pixmap, gc,
630 srcx, srcy, width, height, destx, desty);
631 }
632 else {
633 _swrast_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type );
634 }
635 }
636
637
638
639
640 /*
641 * Every driver should implement a GetString function in order to
642 * return a meaningful GL_RENDERER string.
643 */
644 static const GLubyte *
get_string(struct gl_context * ctx,GLenum name)645 get_string( struct gl_context *ctx, GLenum name )
646 {
647 (void) ctx;
648 switch (name) {
649 case GL_RENDERER:
650 return (const GLubyte *) "Mesa X11";
651 case GL_VENDOR:
652 return NULL;
653 default:
654 return NULL;
655 }
656 }
657
658
659 /*
660 * We implement the glEnable function only because we care about
661 * dither enable/disable.
662 */
663 static void
enable(struct gl_context * ctx,GLenum pname,GLboolean state)664 enable( struct gl_context *ctx, GLenum pname, GLboolean state )
665 {
666 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
667
668 switch (pname) {
669 case GL_DITHER:
670 if (state)
671 xmesa->pixelformat = xmesa->xm_visual->dithered_pf;
672 else
673 xmesa->pixelformat = xmesa->xm_visual->undithered_pf;
674 break;
675 default:
676 ; /* silence compiler warning */
677 }
678 }
679
680
681 /**
682 * Called when the driver should update its state, based on the new_state
683 * flags.
684 */
685 void
xmesa_update_state(struct gl_context * ctx,GLbitfield new_state)686 xmesa_update_state( struct gl_context *ctx, GLbitfield new_state )
687 {
688 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
689
690 /* Propagate statechange information to swrast and swrast_setup
691 * modules. The X11 driver has no internal GL-dependent state.
692 */
693 _swrast_InvalidateState( ctx, new_state );
694 _tnl_InvalidateState( ctx, new_state );
695 _vbo_InvalidateState( ctx, new_state );
696 _swsetup_InvalidateState( ctx, new_state );
697
698 if (_mesa_is_user_fbo(ctx->DrawBuffer))
699 return;
700
701 /*
702 * GL_DITHER, GL_READ/DRAW_BUFFER, buffer binding state, etc. effect
703 * renderbuffer span/clear funcs.
704 * Check _NEW_COLOR to detect dither enable/disable.
705 */
706 if (new_state & (_NEW_COLOR | _NEW_BUFFERS)) {
707 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
708 struct xmesa_renderbuffer *front_xrb, *back_xrb;
709
710 front_xrb = xmbuf->frontxrb;
711 if (front_xrb) {
712 front_xrb->clearFunc = clear_pixmap;
713 }
714
715 back_xrb = xmbuf->backxrb;
716 if (back_xrb) {
717 if (xmbuf->backxrb->pixmap) {
718 back_xrb->clearFunc = clear_pixmap;
719 }
720 else {
721 switch (xmesa->xm_visual->BitsPerPixel) {
722 case 16:
723 back_xrb->clearFunc = clear_16bit_ximage;
724 break;
725 case 24:
726 back_xrb->clearFunc = clear_24bit_ximage;
727 break;
728 case 32:
729 back_xrb->clearFunc = clear_32bit_ximage;
730 break;
731 default:
732 back_xrb->clearFunc = clear_nbit_ximage;
733 break;
734 }
735 }
736 }
737 }
738 }
739
740
741 /**
742 * Called by glViewport.
743 * This is a good time for us to poll the current X window size and adjust
744 * our renderbuffers to match the current window size.
745 * Remember, we have no opportunity to respond to conventional
746 * X Resize/StructureNotify events since the X driver has no event loop.
747 * Thus, we poll.
748 * Note that this trick isn't fool-proof. If the application never calls
749 * glViewport, our notion of the current window size may be incorrect.
750 * That problem led to the GLX_MESA_resize_buffers extension.
751 */
752 static void
xmesa_viewport(struct gl_context * ctx,GLint x,GLint y,GLsizei w,GLsizei h)753 xmesa_viewport(struct gl_context *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
754 {
755 XMesaContext xmctx = XMESA_CONTEXT(ctx);
756 XMesaBuffer xmdrawbuf = XMESA_BUFFER(ctx->WinSysDrawBuffer);
757 XMesaBuffer xmreadbuf = XMESA_BUFFER(ctx->WinSysReadBuffer);
758 xmesa_check_and_update_buffer_size(xmctx, xmdrawbuf);
759 xmesa_check_and_update_buffer_size(xmctx, xmreadbuf);
760 (void) x;
761 (void) y;
762 (void) w;
763 (void) h;
764 }
765
766
767 #if ENABLE_EXT_timer_query
768
769 /*
770 * The GL_EXT_timer_query extension is not enabled for the XServer
771 * indirect renderer. Not sure about how/if wrapping of gettimeofday()
772 * is done, etc.
773 */
774
775 struct xmesa_query_object
776 {
777 struct gl_query_object Base;
778 struct timeval StartTime;
779 };
780
781
782 static struct gl_query_object *
xmesa_new_query_object(struct gl_context * ctx,GLuint id)783 xmesa_new_query_object(struct gl_context *ctx, GLuint id)
784 {
785 struct xmesa_query_object *q = CALLOC_STRUCT(xmesa_query_object);
786 if (q) {
787 q->Base.Id = id;
788 q->Base.Ready = GL_TRUE;
789 }
790 return &q->Base;
791 }
792
793
794 static void
xmesa_begin_query(struct gl_context * ctx,struct gl_query_object * q)795 xmesa_begin_query(struct gl_context *ctx, struct gl_query_object *q)
796 {
797 if (q->Target == GL_TIME_ELAPSED_EXT) {
798 struct xmesa_query_object *xq = (struct xmesa_query_object *) q;
799 (void) gettimeofday(&xq->StartTime, NULL);
800 }
801 }
802
803
804 /**
805 * Return the difference between the two given times in microseconds.
806 */
807 #ifdef __VMS
808 #define suseconds_t unsigned int
809 #endif
810 static GLuint64EXT
time_diff(const struct timeval * t0,const struct timeval * t1)811 time_diff(const struct timeval *t0, const struct timeval *t1)
812 {
813 GLuint64EXT seconds0 = t0->tv_sec & 0xff; /* 0 .. 255 seconds */
814 GLuint64EXT seconds1 = t1->tv_sec & 0xff; /* 0 .. 255 seconds */
815 GLuint64EXT nanosec0 = (seconds0 * 1000000 + t0->tv_usec) * 1000;
816 GLuint64EXT nanosec1 = (seconds1 * 1000000 + t1->tv_usec) * 1000;
817 return nanosec1 - nanosec0;
818 }
819
820
821 static void
xmesa_end_query(struct gl_context * ctx,struct gl_query_object * q)822 xmesa_end_query(struct gl_context *ctx, struct gl_query_object *q)
823 {
824 if (q->Target == GL_TIME_ELAPSED_EXT) {
825 struct xmesa_query_object *xq = (struct xmesa_query_object *) q;
826 struct timeval endTime;
827 (void) gettimeofday(&endTime, NULL);
828 /* result is in nanoseconds! */
829 q->Result = time_diff(&xq->StartTime, &endTime);
830 }
831 q->Ready = GL_TRUE;
832 }
833
834 #endif /* ENABLE_timer_query */
835
836
837 /**
838 * Initialize the device driver function table with the functions
839 * we implement in this driver.
840 */
841 void
xmesa_init_driver_functions(XMesaVisual xmvisual,struct dd_function_table * driver)842 xmesa_init_driver_functions( XMesaVisual xmvisual,
843 struct dd_function_table *driver )
844 {
845 driver->GetString = get_string;
846 driver->UpdateState = xmesa_update_state;
847 driver->GetBufferSize = NULL; /* OBSOLETE */
848 driver->Flush = finish_or_flush;
849 driver->Finish = finish_or_flush;
850 driver->ColorMask = color_mask;
851 driver->Enable = enable;
852 driver->Viewport = xmesa_viewport;
853 if (TEST_META_FUNCS) {
854 driver->Clear = _mesa_meta_Clear;
855 driver->CopyPixels = _mesa_meta_CopyPixels;
856 driver->BlitFramebuffer = _mesa_meta_BlitFramebuffer;
857 driver->DrawPixels = _mesa_meta_DrawPixels;
858 driver->Bitmap = _mesa_meta_Bitmap;
859 }
860 else {
861 driver->Clear = clear_buffers;
862 driver->CopyPixels = xmesa_CopyPixels;
863 if (xmvisual->undithered_pf == PF_8R8G8B &&
864 xmvisual->dithered_pf == PF_8R8G8B &&
865 xmvisual->BitsPerPixel == 32) {
866 driver->DrawPixels = xmesa_DrawPixels_8R8G8B;
867 }
868 else if (xmvisual->undithered_pf == PF_5R6G5B) {
869 driver->DrawPixels = xmesa_DrawPixels_5R6G5B;
870 }
871 }
872
873 driver->MapRenderbuffer = xmesa_MapRenderbuffer;
874 driver->UnmapRenderbuffer = xmesa_UnmapRenderbuffer;
875
876 driver->GenerateMipmap = _mesa_generate_mipmap;
877
878 #if ENABLE_EXT_timer_query
879 driver->NewQueryObject = xmesa_new_query_object;
880 driver->BeginQuery = xmesa_begin_query;
881 driver->EndQuery = xmesa_end_query;
882 #endif
883 }
884
885
886 #define XMESA_NEW_POINT (_NEW_POINT | \
887 _NEW_RENDERMODE | \
888 _SWRAST_NEW_RASTERMASK)
889
890 #define XMESA_NEW_LINE (_NEW_LINE | \
891 _NEW_TEXTURE | \
892 _NEW_LIGHT | \
893 _NEW_DEPTH | \
894 _NEW_RENDERMODE | \
895 _SWRAST_NEW_RASTERMASK)
896
897 #define XMESA_NEW_TRIANGLE (_NEW_POLYGON | \
898 _NEW_TEXTURE | \
899 _NEW_LIGHT | \
900 _NEW_DEPTH | \
901 _NEW_RENDERMODE | \
902 _SWRAST_NEW_RASTERMASK)
903
904
905 /**
906 * Extend the software rasterizer with our line/point/triangle
907 * functions.
908 * Called during context creation only.
909 */
xmesa_register_swrast_functions(struct gl_context * ctx)910 void xmesa_register_swrast_functions( struct gl_context *ctx )
911 {
912 SWcontext *swrast = SWRAST_CONTEXT( ctx );
913
914 swrast->choose_point = xmesa_choose_point;
915 swrast->choose_line = xmesa_choose_line;
916 swrast->choose_triangle = xmesa_choose_triangle;
917
918 /* XXX these lines have no net effect. Remove??? */
919 swrast->InvalidatePointMask |= XMESA_NEW_POINT;
920 swrast->InvalidateLineMask |= XMESA_NEW_LINE;
921 swrast->InvalidateTriangleMask |= XMESA_NEW_TRIANGLE;
922 }
923