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