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/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 mtx_lock(&_xmesa_lock);
58 XSync( xmesa->display, False );
59 mtx_unlock(&_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 MAP_INTERNAL);
371 if (!buf) {
372 return; /* error */
373 }
374 pixels = ADD_POINTERS(buf, pixels);
375 }
376
377 if (_mesa_clip_drawpixels(ctx, &dstX, &dstY, &w, &h, &clippedUnpack)) {
378 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
379 XMesaDisplay *dpy = xmesa->xm_visual->display;
380 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
381 const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
382 struct xmesa_renderbuffer *xrb
383 = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
384 const int srcX = clippedUnpack.SkipPixels;
385 const int srcY = clippedUnpack.SkipRows;
386 const int rowLength = clippedUnpack.RowLength;
387 XMesaImage ximage;
388
389 assert(xmesa->xm_visual->dithered_pf == PF_8R8G8B);
390 assert(xmesa->xm_visual->undithered_pf == PF_8R8G8B);
391 assert(dpy);
392 assert(gc);
393
394 /* This is a little tricky since all coordinates up to now have
395 * been in the OpenGL bottom-to-top orientation. X is top-to-bottom
396 * so we have to carefully compute the Y coordinates/addresses here.
397 */
398 memset(&ximage, 0, sizeof(XMesaImage));
399 ximage.width = width;
400 ximage.height = height;
401 ximage.format = ZPixmap;
402 ximage.data = (char *) pixels
403 + ((srcY + h - 1) * rowLength + srcX) * 4;
404 ximage.byte_order = LSBFirst;
405 ximage.bitmap_unit = 32;
406 ximage.bitmap_bit_order = LSBFirst;
407 ximage.bitmap_pad = 32;
408 ximage.depth = 32;
409 ximage.bits_per_pixel = 32;
410 ximage.bytes_per_line = -rowLength * 4; /* negative to flip image */
411 /* it seems we don't need to set the ximage.red/green/blue_mask fields */
412 /* flip Y axis for dest position */
413 dstY = YFLIP(xrb, dstY) - h + 1;
414 XPutImage(dpy, xrb->pixmap, gc, &ximage, 0, 0, dstX, dstY, w, h);
415 }
416
417 if (_mesa_is_bufferobj(unpack->BufferObj)) {
418 ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
419 }
420 }
421 else {
422 /* software fallback */
423 _swrast_DrawPixels(ctx, x, y, width, height,
424 format, type, unpack, pixels);
425 }
426 }
427
428
429
430 /**
431 * Check if we can do an optimized glDrawPixels into an 5R6G5B visual.
432 */
433 static GLboolean
can_do_DrawPixels_5R6G5B(struct gl_context * ctx,GLenum format,GLenum type)434 can_do_DrawPixels_5R6G5B(struct gl_context *ctx, GLenum format, GLenum type)
435 {
436 if (format == GL_RGB &&
437 type == GL_UNSIGNED_SHORT_5_6_5 &&
438 !ctx->Color.DitherFlag && /* no dithering */
439 ctx->DrawBuffer &&
440 _mesa_is_winsys_fbo(ctx->DrawBuffer) &&
441 ctx->Pixel.ZoomX == 1.0 && /* no zooming */
442 ctx->Pixel.ZoomY == 1.0 &&
443 ctx->_ImageTransferState == 0 /* no color tables, scale/bias, etc */) {
444 const SWcontext *swrast = SWRAST_CONTEXT(ctx);
445
446 if (swrast->NewState)
447 _swrast_validate_derived( ctx );
448
449 if ((swrast->_RasterMask & ~CLIP_BIT) == 0) /* no blend, z-test, etc */ {
450 struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
451 if (rb) {
452 struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
453 if (xrb &&
454 xrb->pixmap && /* drawing to pixmap or window */
455 _mesa_get_format_bits(xrb->Base.Base.Format, GL_ALPHA_BITS) == 0) {
456 return GL_TRUE;
457 }
458 }
459 }
460 }
461 return GL_FALSE;
462 }
463
464
465 /**
466 * This function implements glDrawPixels() with an XPutImage call when
467 * drawing to the front buffer (X Window drawable). The image format
468 * must be GL_RGB and image type must be GL_UNSIGNED_SHORT_5_6_5 to
469 * match the PF_5R6G5B pixel format.
470 */
471 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)472 xmesa_DrawPixels_5R6G5B( struct gl_context *ctx,
473 GLint x, GLint y, GLsizei width, GLsizei height,
474 GLenum format, GLenum type,
475 const struct gl_pixelstore_attrib *unpack,
476 const GLvoid *pixels )
477 {
478 if (can_do_DrawPixels_5R6G5B(ctx, format, type)) {
479 const SWcontext *swrast = SWRAST_CONTEXT( ctx );
480 struct gl_pixelstore_attrib clippedUnpack = *unpack;
481 int dstX = x;
482 int dstY = y;
483 int w = width;
484 int h = height;
485
486 if (swrast->NewState)
487 _swrast_validate_derived( ctx );
488
489 if (_mesa_is_bufferobj(unpack->BufferObj)) {
490 /* unpack from PBO */
491 GLubyte *buf;
492 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
493 format, type, INT_MAX, pixels)) {
494 _mesa_error(ctx, GL_INVALID_OPERATION,
495 "glDrawPixels(invalid PBO access)");
496 return;
497 }
498 buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0,
499 unpack->BufferObj->Size,
500 GL_MAP_READ_BIT,
501 unpack->BufferObj,
502 MAP_INTERNAL);
503 if (!buf) {
504 return; /* error */
505 }
506 pixels = ADD_POINTERS(buf, pixels);
507 }
508
509 if (_mesa_clip_drawpixels(ctx, &dstX, &dstY, &w, &h, &clippedUnpack)) {
510 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
511 XMesaDisplay *dpy = xmesa->xm_visual->display;
512 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
513 const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
514 struct xmesa_renderbuffer *xrb
515 = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
516 const int srcX = clippedUnpack.SkipPixels;
517 const int srcY = clippedUnpack.SkipRows;
518 const int rowLength = clippedUnpack.RowLength;
519 XMesaImage ximage;
520
521 assert(xmesa->xm_visual->undithered_pf == PF_5R6G5B);
522 assert(dpy);
523 assert(gc);
524
525 /* This is a little tricky since all coordinates up to now have
526 * been in the OpenGL bottom-to-top orientation. X is top-to-bottom
527 * so we have to carefully compute the Y coordinates/addresses here.
528 */
529 memset(&ximage, 0, sizeof(XMesaImage));
530 ximage.width = width;
531 ximage.height = height;
532 ximage.format = ZPixmap;
533 ximage.data = (char *) pixels
534 + ((srcY + h - 1) * rowLength + srcX) * 2;
535 ximage.byte_order = LSBFirst;
536 ximage.bitmap_unit = 16;
537 ximage.bitmap_bit_order = LSBFirst;
538 ximage.bitmap_pad = 16;
539 ximage.depth = 16;
540 ximage.bits_per_pixel = 16;
541 ximage.bytes_per_line = -rowLength * 2; /* negative to flip image */
542 /* it seems we don't need to set the ximage.red/green/blue_mask fields */
543 /* flip Y axis for dest position */
544 dstY = YFLIP(xrb, dstY) - h + 1;
545 XPutImage(dpy, xrb->pixmap, gc, &ximage, 0, 0, dstX, dstY, w, h);
546 }
547
548 if (unpack->BufferObj->Name) {
549 ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
550 }
551 }
552 else {
553 /* software fallback */
554 _swrast_DrawPixels(ctx, x, y, width, height,
555 format, type, unpack, pixels);
556 }
557 }
558
559
560 /**
561 * Determine if we can do an optimized glCopyPixels.
562 */
563 static GLboolean
can_do_CopyPixels(struct gl_context * ctx,GLenum type)564 can_do_CopyPixels(struct gl_context *ctx, GLenum type)
565 {
566 if (type == GL_COLOR &&
567 ctx->_ImageTransferState == 0 && /* no color tables, scale/bias, etc */
568 ctx->Pixel.ZoomX == 1.0 && /* no zooming */
569 ctx->Pixel.ZoomY == 1.0 &&
570 ctx->Color.DrawBuffer[0] == GL_FRONT && /* copy to front buf */
571 ctx->Pixel.ReadBuffer == GL_FRONT && /* copy from front buf */
572 ctx->ReadBuffer->_ColorReadBuffer &&
573 ctx->DrawBuffer->_ColorDrawBuffers[0]) {
574 const SWcontext *swrast = SWRAST_CONTEXT( ctx );
575
576 if (swrast->NewState)
577 _swrast_validate_derived( ctx );
578
579 if ((swrast->_RasterMask & ~CLIP_BIT) == 0x0 &&
580 ctx->ReadBuffer &&
581 ctx->ReadBuffer->_ColorReadBuffer &&
582 ctx->DrawBuffer &&
583 ctx->DrawBuffer->_ColorDrawBuffers[0]) {
584 struct xmesa_renderbuffer *srcXrb
585 = xmesa_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
586 struct xmesa_renderbuffer *dstXrb
587 = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
588 if (srcXrb->pixmap && dstXrb->pixmap) {
589 return GL_TRUE;
590 }
591 }
592 }
593 return GL_FALSE;
594 }
595
596
597 /**
598 * Implement glCopyPixels for the front color buffer (or back buffer Pixmap)
599 * for the color buffer. Don't support zooming, pixel transfer, etc.
600 * We do support copying from one window to another, ala glXMakeCurrentRead.
601 */
602 static void
xmesa_CopyPixels(struct gl_context * ctx,GLint srcx,GLint srcy,GLsizei width,GLsizei height,GLint destx,GLint desty,GLenum type)603 xmesa_CopyPixels( struct gl_context *ctx,
604 GLint srcx, GLint srcy, GLsizei width, GLsizei height,
605 GLint destx, GLint desty, GLenum type )
606 {
607 if (can_do_CopyPixels(ctx, type)) {
608 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
609 XMesaDisplay *dpy = xmesa->xm_visual->display;
610 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
611 const XMesaGC gc = xmbuf->cleargc; /* effected by glColorMask */
612 struct xmesa_renderbuffer *srcXrb
613 = xmesa_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
614 struct xmesa_renderbuffer *dstXrb
615 = xmesa_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
616
617 assert(dpy);
618 assert(gc);
619
620 /* Note: we don't do any special clipping work here. We could,
621 * but X will do it for us.
622 */
623 srcy = YFLIP(srcXrb, srcy) - height + 1;
624 desty = YFLIP(dstXrb, desty) - height + 1;
625 XCopyArea(dpy, srcXrb->pixmap, dstXrb->pixmap, gc,
626 srcx, srcy, width, height, destx, desty);
627 }
628 else {
629 _swrast_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type );
630 }
631 }
632
633
634
635
636 /*
637 * Every driver should implement a GetString function in order to
638 * return a meaningful GL_RENDERER string.
639 */
640 static const GLubyte *
get_string(struct gl_context * ctx,GLenum name)641 get_string( struct gl_context *ctx, GLenum name )
642 {
643 (void) ctx;
644 switch (name) {
645 case GL_RENDERER:
646 return (const GLubyte *) "Mesa X11";
647 case GL_VENDOR:
648 return NULL;
649 default:
650 return NULL;
651 }
652 }
653
654
655 /*
656 * We implement the glEnable function only because we care about
657 * dither enable/disable.
658 */
659 static void
enable(struct gl_context * ctx,GLenum pname,GLboolean state)660 enable( struct gl_context *ctx, GLenum pname, GLboolean state )
661 {
662 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
663
664 switch (pname) {
665 case GL_DITHER:
666 if (state)
667 xmesa->pixelformat = xmesa->xm_visual->dithered_pf;
668 else
669 xmesa->pixelformat = xmesa->xm_visual->undithered_pf;
670 break;
671 default:
672 ; /* silence compiler warning */
673 }
674 }
675
676
677 /**
678 * Called when the driver should update its state, based on the new_state
679 * flags.
680 */
681 void
xmesa_update_state(struct gl_context * ctx,GLbitfield new_state)682 xmesa_update_state( struct gl_context *ctx, GLbitfield new_state )
683 {
684 const XMesaContext xmesa = XMESA_CONTEXT(ctx);
685
686 /* Propagate statechange information to swrast and swrast_setup
687 * modules. The X11 driver has no internal GL-dependent state.
688 */
689 _swrast_InvalidateState( ctx, new_state );
690 _tnl_InvalidateState( ctx, new_state );
691 _vbo_InvalidateState( ctx, new_state );
692 _swsetup_InvalidateState( ctx, new_state );
693
694 if (_mesa_is_user_fbo(ctx->DrawBuffer))
695 return;
696
697 /*
698 * GL_DITHER, GL_READ/DRAW_BUFFER, buffer binding state, etc. effect
699 * renderbuffer span/clear funcs.
700 * Check _NEW_COLOR to detect dither enable/disable.
701 */
702 if (new_state & (_NEW_COLOR | _NEW_BUFFERS)) {
703 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
704 struct xmesa_renderbuffer *front_xrb, *back_xrb;
705
706 front_xrb = xmbuf->frontxrb;
707 if (front_xrb) {
708 front_xrb->clearFunc = clear_pixmap;
709 }
710
711 back_xrb = xmbuf->backxrb;
712 if (back_xrb) {
713 if (xmbuf->backxrb->pixmap) {
714 back_xrb->clearFunc = clear_pixmap;
715 }
716 else {
717 switch (xmesa->xm_visual->BitsPerPixel) {
718 case 16:
719 back_xrb->clearFunc = clear_16bit_ximage;
720 break;
721 case 24:
722 back_xrb->clearFunc = clear_24bit_ximage;
723 break;
724 case 32:
725 back_xrb->clearFunc = clear_32bit_ximage;
726 break;
727 default:
728 back_xrb->clearFunc = clear_nbit_ximage;
729 break;
730 }
731 }
732 }
733 }
734 }
735
736
737 /**
738 * Called by glViewport.
739 * This is a good time for us to poll the current X window size and adjust
740 * our renderbuffers to match the current window size.
741 * Remember, we have no opportunity to respond to conventional
742 * X Resize/StructureNotify events since the X driver has no event loop.
743 * Thus, we poll.
744 * Note that this trick isn't fool-proof. If the application never calls
745 * glViewport, our notion of the current window size may be incorrect.
746 * That problem led to the GLX_MESA_resize_buffers extension.
747 */
748 static void
xmesa_viewport(struct gl_context * ctx)749 xmesa_viewport(struct gl_context *ctx)
750 {
751 XMesaContext xmctx = XMESA_CONTEXT(ctx);
752 XMesaBuffer xmdrawbuf = XMESA_BUFFER(ctx->WinSysDrawBuffer);
753 XMesaBuffer xmreadbuf = XMESA_BUFFER(ctx->WinSysReadBuffer);
754 xmesa_check_and_update_buffer_size(xmctx, xmdrawbuf);
755 xmesa_check_and_update_buffer_size(xmctx, xmreadbuf);
756 }
757
758
759 #if ENABLE_EXT_timer_query
760
761 /*
762 * The GL_EXT_timer_query extension is not enabled for the XServer
763 * indirect renderer. Not sure about how/if wrapping of gettimeofday()
764 * is done, etc.
765 */
766
767 struct xmesa_query_object
768 {
769 struct gl_query_object Base;
770 struct timeval StartTime;
771 };
772
773
774 static struct gl_query_object *
xmesa_new_query_object(struct gl_context * ctx,GLuint id)775 xmesa_new_query_object(struct gl_context *ctx, GLuint id)
776 {
777 struct xmesa_query_object *q = CALLOC_STRUCT(xmesa_query_object);
778 if (q) {
779 q->Base.Id = id;
780 q->Base.Ready = GL_TRUE;
781 }
782 return &q->Base;
783 }
784
785
786 static void
xmesa_begin_query(struct gl_context * ctx,struct gl_query_object * q)787 xmesa_begin_query(struct gl_context *ctx, struct gl_query_object *q)
788 {
789 if (q->Target == GL_TIME_ELAPSED_EXT) {
790 struct xmesa_query_object *xq = (struct xmesa_query_object *) q;
791 (void) gettimeofday(&xq->StartTime, NULL);
792 }
793 }
794
795
796 /**
797 * Return the difference between the two given times in microseconds.
798 */
799 static GLuint64EXT
time_diff(const struct timeval * t0,const struct timeval * t1)800 time_diff(const struct timeval *t0, const struct timeval *t1)
801 {
802 GLuint64EXT seconds0 = t0->tv_sec & 0xff; /* 0 .. 255 seconds */
803 GLuint64EXT seconds1 = t1->tv_sec & 0xff; /* 0 .. 255 seconds */
804 GLuint64EXT nanosec0 = (seconds0 * 1000000 + t0->tv_usec) * 1000;
805 GLuint64EXT nanosec1 = (seconds1 * 1000000 + t1->tv_usec) * 1000;
806 return nanosec1 - nanosec0;
807 }
808
809
810 static void
xmesa_end_query(struct gl_context * ctx,struct gl_query_object * q)811 xmesa_end_query(struct gl_context *ctx, struct gl_query_object *q)
812 {
813 if (q->Target == GL_TIME_ELAPSED_EXT) {
814 struct xmesa_query_object *xq = (struct xmesa_query_object *) q;
815 struct timeval endTime;
816 (void) gettimeofday(&endTime, NULL);
817 /* result is in nanoseconds! */
818 q->Result = time_diff(&xq->StartTime, &endTime);
819 }
820 q->Ready = GL_TRUE;
821 }
822
823 #endif /* ENABLE_timer_query */
824
825
826 /**
827 * Initialize the device driver function table with the functions
828 * we implement in this driver.
829 */
830 void
xmesa_init_driver_functions(XMesaVisual xmvisual,struct dd_function_table * driver)831 xmesa_init_driver_functions( XMesaVisual xmvisual,
832 struct dd_function_table *driver )
833 {
834 driver->GetString = get_string;
835 driver->UpdateState = xmesa_update_state;
836 driver->Flush = finish_or_flush;
837 driver->Finish = finish_or_flush;
838 driver->ColorMask = color_mask;
839 driver->Enable = enable;
840 driver->Viewport = xmesa_viewport;
841 if (TEST_META_FUNCS) {
842 driver->Clear = _mesa_meta_Clear;
843 driver->CopyPixels = _mesa_meta_CopyPixels;
844 driver->BlitFramebuffer = _mesa_meta_and_swrast_BlitFramebuffer;
845 driver->DrawPixels = _mesa_meta_DrawPixels;
846 driver->Bitmap = _mesa_meta_Bitmap;
847 }
848 else {
849 driver->Clear = clear_buffers;
850 driver->CopyPixels = xmesa_CopyPixels;
851 if (xmvisual->undithered_pf == PF_8R8G8B &&
852 xmvisual->dithered_pf == PF_8R8G8B &&
853 xmvisual->BitsPerPixel == 32) {
854 driver->DrawPixels = xmesa_DrawPixels_8R8G8B;
855 }
856 else if (xmvisual->undithered_pf == PF_5R6G5B) {
857 driver->DrawPixels = xmesa_DrawPixels_5R6G5B;
858 }
859 }
860
861 driver->MapRenderbuffer = xmesa_MapRenderbuffer;
862 driver->UnmapRenderbuffer = xmesa_UnmapRenderbuffer;
863
864 driver->GenerateMipmap = _mesa_generate_mipmap;
865
866 #if ENABLE_EXT_timer_query
867 driver->NewQueryObject = xmesa_new_query_object;
868 driver->BeginQuery = xmesa_begin_query;
869 driver->EndQuery = xmesa_end_query;
870 #endif
871 }
872
873
874 #define XMESA_NEW_POINT (_NEW_POINT | \
875 _NEW_RENDERMODE | \
876 _SWRAST_NEW_RASTERMASK)
877
878 #define XMESA_NEW_LINE (_NEW_LINE | \
879 _NEW_TEXTURE | \
880 _NEW_LIGHT | \
881 _NEW_DEPTH | \
882 _NEW_RENDERMODE | \
883 _SWRAST_NEW_RASTERMASK)
884
885 #define XMESA_NEW_TRIANGLE (_NEW_POLYGON | \
886 _NEW_TEXTURE | \
887 _NEW_LIGHT | \
888 _NEW_DEPTH | \
889 _NEW_RENDERMODE | \
890 _SWRAST_NEW_RASTERMASK)
891
892
893 /**
894 * Extend the software rasterizer with our line/point/triangle
895 * functions.
896 * Called during context creation only.
897 */
xmesa_register_swrast_functions(struct gl_context * ctx)898 void xmesa_register_swrast_functions( struct gl_context *ctx )
899 {
900 SWcontext *swrast = SWRAST_CONTEXT( ctx );
901
902 swrast->choose_point = xmesa_choose_point;
903 swrast->choose_line = xmesa_choose_line;
904 swrast->choose_triangle = xmesa_choose_triangle;
905
906 /* XXX these lines have no net effect. Remove??? */
907 swrast->InvalidatePointMask |= XMESA_NEW_POINT;
908 swrast->InvalidateLineMask |= XMESA_NEW_LINE;
909 swrast->InvalidateTriangleMask |= XMESA_NEW_TRIANGLE;
910 }
911