1 /*
2 * Copyright 2008, 2010 George Sapountzis <gsapountzis@gmail.com>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included
12 * in all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 */
22
23 /*
24 * DRI software rasterizer
25 *
26 * This is the mesa swrast module packaged into a DRI driver structure.
27 *
28 * The front-buffer is allocated by the loader. The loader provides read/write
29 * callbacks for access to the front-buffer. The driver uses a scratch row for
30 * front-buffer rendering to avoid repeated calls to the loader.
31 *
32 * The back-buffer is allocated by the driver and is private.
33 */
34
35 #include <stdio.h>
36 #include "main/api_exec.h"
37 #include "main/context.h"
38 #include "main/extensions.h"
39 #include "main/formats.h"
40 #include "main/framebuffer.h"
41 #include "main/imports.h"
42 #include "main/renderbuffer.h"
43 #include "main/version.h"
44 #include "main/vtxfmt.h"
45 #include "swrast/swrast.h"
46 #include "swrast/s_renderbuffer.h"
47 #include "swrast_setup/swrast_setup.h"
48 #include "tnl/tnl.h"
49 #include "tnl/t_context.h"
50 #include "tnl/t_pipeline.h"
51 #include "vbo/vbo.h"
52 #include "drivers/common/driverfuncs.h"
53 #include "drivers/common/meta.h"
54 #include "utils.h"
55
56 #include "main/teximage.h"
57 #include "main/texformat.h"
58 #include "main/texobj.h"
59 #include "main/texstate.h"
60
61 #include "swrast_priv.h"
62 #include "swrast/s_context.h"
63
64 #include <sys/types.h>
65 #ifdef HAVE_SYS_SYSCTL_H
66 # include <sys/sysctl.h>
67 #endif
68
69 const __DRIextension **__driDriverGetExtensions_swrast(void);
70
71 const char * const swrast_vendor_string = "Mesa Project";
72 const char * const swrast_renderer_string = "Software Rasterizer";
73
74 /**
75 * Screen and config-related functions
76 */
77
swrastSetTexBuffer2(__DRIcontext * pDRICtx,GLint target,GLint texture_format,__DRIdrawable * dPriv)78 static void swrastSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
79 GLint texture_format, __DRIdrawable *dPriv)
80 {
81 struct dri_context *dri_ctx;
82 int x, y, w, h;
83 __DRIscreen *sPriv = dPriv->driScreenPriv;
84 struct gl_texture_object *texObj;
85 struct gl_texture_image *texImage;
86 struct swrast_texture_image *swImage;
87 uint32_t internalFormat;
88 mesa_format texFormat;
89
90 dri_ctx = pDRICtx->driverPrivate;
91
92 internalFormat = (texture_format == __DRI_TEXTURE_FORMAT_RGB ? 3 : 4);
93
94 texObj = _mesa_get_current_tex_object(&dri_ctx->Base, target);
95 texImage = _mesa_get_tex_image(&dri_ctx->Base, texObj, target, 0);
96 swImage = swrast_texture_image(texImage);
97
98 _mesa_lock_texture(&dri_ctx->Base, texObj);
99
100 sPriv->swrast_loader->getDrawableInfo(dPriv, &x, &y, &w, &h, dPriv->loaderPrivate);
101
102 if (texture_format == __DRI_TEXTURE_FORMAT_RGB)
103 texFormat = MESA_FORMAT_B8G8R8X8_UNORM;
104 else
105 texFormat = MESA_FORMAT_B8G8R8A8_UNORM;
106
107 _mesa_init_teximage_fields(&dri_ctx->Base, texImage,
108 w, h, 1, 0, internalFormat, texFormat);
109
110 sPriv->swrast_loader->getImage(dPriv, x, y, w, h, (char *)swImage->Buffer,
111 dPriv->loaderPrivate);
112
113 _mesa_unlock_texture(&dri_ctx->Base, texObj);
114 }
115
swrastSetTexBuffer(__DRIcontext * pDRICtx,GLint target,__DRIdrawable * dPriv)116 static void swrastSetTexBuffer(__DRIcontext *pDRICtx, GLint target,
117 __DRIdrawable *dPriv)
118 {
119 swrastSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
120 }
121
122 static const __DRItexBufferExtension swrastTexBufferExtension = {
123 .base = { __DRI_TEX_BUFFER, 3 },
124
125 .setTexBuffer = swrastSetTexBuffer,
126 .setTexBuffer2 = swrastSetTexBuffer2,
127 .releaseTexBuffer = NULL,
128 };
129
130
131 static int
swrast_query_renderer_integer(__DRIscreen * psp,int param,unsigned int * value)132 swrast_query_renderer_integer(__DRIscreen *psp, int param,
133 unsigned int *value)
134 {
135 switch (param) {
136 case __DRI2_RENDERER_VENDOR_ID:
137 case __DRI2_RENDERER_DEVICE_ID:
138 /* Return 0xffffffff for both vendor and device id */
139 value[0] = 0xffffffff;
140 return 0;
141 case __DRI2_RENDERER_ACCELERATED:
142 value[0] = 0;
143 return 0;
144 case __DRI2_RENDERER_VIDEO_MEMORY: {
145 /* This should probably share code with os_get_total_physical_memory()
146 * from src/gallium/auxiliary/os/os_misc.c
147 */
148 #if defined(CTL_HW) && defined(HW_MEMSIZE)
149 int mib[2] = { CTL_HW, HW_MEMSIZE };
150 unsigned long system_memory_bytes;
151 size_t len = sizeof(system_memory_bytes);
152 if (sysctl(mib, 2, &system_memory_bytes, &len, NULL, 0) != 0)
153 return -1;
154 #elif defined(_SC_PHYS_PAGES) && defined(_SC_PAGE_SIZE)
155 /* XXX: Do we want to return the full amount of system memory ? */
156 const long system_memory_pages = sysconf(_SC_PHYS_PAGES);
157 const long system_page_size = sysconf(_SC_PAGE_SIZE);
158
159 if (system_memory_pages <= 0 || system_page_size <= 0)
160 return -1;
161
162 const uint64_t system_memory_bytes = (uint64_t) system_memory_pages
163 * (uint64_t) system_page_size;
164 #else
165 #error "Unsupported platform"
166 #endif
167
168 const unsigned system_memory_megabytes =
169 (unsigned) (system_memory_bytes / (1024 * 1024));
170
171 value[0] = system_memory_megabytes;
172 return 0;
173 }
174 case __DRI2_RENDERER_UNIFIED_MEMORY_ARCHITECTURE:
175 /**
176 * XXX: Perhaps we should return 1 ?
177 * See issue #7 from the spec, currently UNRESOLVED.
178 */
179 value[0] = 0;
180 return 0;
181 default:
182 return driQueryRendererIntegerCommon(psp, param, value);
183 }
184 }
185
186 static int
swrast_query_renderer_string(__DRIscreen * psp,int param,const char ** value)187 swrast_query_renderer_string(__DRIscreen *psp, int param, const char **value)
188 {
189 switch (param) {
190 case __DRI2_RENDERER_VENDOR_ID:
191 value[0] = swrast_vendor_string;
192 return 0;
193 case __DRI2_RENDERER_DEVICE_ID:
194 value[0] = swrast_renderer_string;
195 return 0;
196 default:
197 return -1;
198 }
199 }
200
201 static const __DRI2rendererQueryExtension swrast_query_renderer_extension = {
202 .base = { __DRI2_RENDERER_QUERY, 1 },
203
204 .queryInteger = swrast_query_renderer_integer,
205 .queryString = swrast_query_renderer_string
206 };
207
208 static const __DRIextension *dri_screen_extensions[] = {
209 &swrastTexBufferExtension.base,
210 &swrast_query_renderer_extension.base,
211 &dri2ConfigQueryExtension.base,
212 &dri2NoErrorExtension.base,
213 NULL
214 };
215
216 static __DRIconfig **
swrastFillInModes(__DRIscreen * psp,unsigned pixel_bits,unsigned depth_bits,unsigned stencil_bits,GLboolean have_back_buffer)217 swrastFillInModes(__DRIscreen *psp,
218 unsigned pixel_bits, unsigned depth_bits,
219 unsigned stencil_bits, GLboolean have_back_buffer)
220 {
221 __DRIconfig **configs;
222 unsigned depth_buffer_factor;
223 unsigned back_buffer_factor;
224 mesa_format format;
225
226 /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
227 * support pageflipping at all.
228 */
229 static const GLenum back_buffer_modes[] = {
230 __DRI_ATTRIB_SWAP_NONE, __DRI_ATTRIB_SWAP_UNDEFINED
231 };
232
233 uint8_t depth_bits_array[4];
234 uint8_t stencil_bits_array[4];
235 uint8_t msaa_samples_array[1];
236
237 (void) psp;
238 (void) have_back_buffer;
239
240 depth_bits_array[0] = 0;
241 depth_bits_array[1] = 0;
242 depth_bits_array[2] = depth_bits;
243 depth_bits_array[3] = depth_bits;
244
245 /* Just like with the accumulation buffer, always provide some modes
246 * with a stencil buffer.
247 */
248 stencil_bits_array[0] = 0;
249 stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
250 stencil_bits_array[2] = 0;
251 stencil_bits_array[3] = (stencil_bits == 0) ? 8 : stencil_bits;
252
253 msaa_samples_array[0] = 0;
254
255 depth_buffer_factor = 4;
256 back_buffer_factor = 2;
257
258 switch (pixel_bits) {
259 case 16:
260 format = MESA_FORMAT_B5G6R5_UNORM;
261 break;
262 case 24:
263 format = MESA_FORMAT_B8G8R8X8_UNORM;
264 break;
265 case 32:
266 format = MESA_FORMAT_B8G8R8A8_UNORM;
267 break;
268 default:
269 fprintf(stderr, "[%s:%u] bad depth %d\n", __func__, __LINE__,
270 pixel_bits);
271 return NULL;
272 }
273
274 configs = driCreateConfigs(format,
275 depth_bits_array, stencil_bits_array,
276 depth_buffer_factor, back_buffer_modes,
277 back_buffer_factor, msaa_samples_array, 1,
278 GL_TRUE, GL_FALSE);
279 if (configs == NULL) {
280 fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
281 __LINE__);
282 return NULL;
283 }
284
285 return configs;
286 }
287
288 static const __DRIconfig **
dri_init_screen(__DRIscreen * psp)289 dri_init_screen(__DRIscreen * psp)
290 {
291 __DRIconfig **configs16, **configs24, **configs32;
292
293 TRACE;
294
295 psp->max_gl_compat_version = 21;
296 psp->max_gl_es1_version = 11;
297 psp->max_gl_es2_version = 20;
298
299 psp->extensions = dri_screen_extensions;
300
301 configs16 = swrastFillInModes(psp, 16, 16, 0, 1);
302 configs24 = swrastFillInModes(psp, 24, 24, 8, 1);
303 configs32 = swrastFillInModes(psp, 32, 24, 8, 1);
304
305 configs24 = driConcatConfigs(configs16, configs24);
306 configs32 = driConcatConfigs(configs24, configs32);
307
308 return (const __DRIconfig **)configs32;
309 }
310
311 static void
dri_destroy_screen(__DRIscreen * sPriv)312 dri_destroy_screen(__DRIscreen * sPriv)
313 {
314 TRACE;
315 (void) sPriv;
316 }
317
318
319 /**
320 * Framebuffer and renderbuffer-related functions.
321 */
322
323 static GLuint
choose_pixel_format(const struct gl_config * v)324 choose_pixel_format(const struct gl_config *v)
325 {
326 int depth = v->rgbBits;
327
328 if (depth == 32
329 && v->redMask == 0xff0000
330 && v->greenMask == 0x00ff00
331 && v->blueMask == 0x0000ff)
332 return PF_A8R8G8B8;
333 else if (depth == 24
334 && v->redMask == 0xff0000
335 && v->greenMask == 0x00ff00
336 && v->blueMask == 0x0000ff)
337 return PF_X8R8G8B8;
338 else if (depth == 16
339 && v->redMask == 0xf800
340 && v->greenMask == 0x07e0
341 && v->blueMask == 0x001f)
342 return PF_R5G6B5;
343 else if (depth == 8
344 && v->redMask == 0x07
345 && v->greenMask == 0x38
346 && v->blueMask == 0xc0)
347 return PF_R3G3B2;
348
349 _mesa_problem( NULL, "unexpected format in %s", __func__ );
350 return 0;
351 }
352
353 static void
swrast_delete_renderbuffer(struct gl_context * ctx,struct gl_renderbuffer * rb)354 swrast_delete_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
355 {
356 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
357
358 TRACE;
359
360 free(xrb->Base.Buffer);
361 _mesa_delete_renderbuffer(ctx, rb);
362 }
363
364 /* see bytes_per_line in libGL */
365 static inline int
bytes_per_line(unsigned pitch_bits,unsigned mul)366 bytes_per_line(unsigned pitch_bits, unsigned mul)
367 {
368 unsigned mask = mul - 1;
369
370 return ((pitch_bits + mask) & ~mask) / 8;
371 }
372
373 static GLboolean
swrast_alloc_front_storage(struct gl_context * ctx,struct gl_renderbuffer * rb,GLenum internalFormat,GLuint width,GLuint height)374 swrast_alloc_front_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
375 GLenum internalFormat, GLuint width, GLuint height)
376 {
377 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
378
379 TRACE;
380
381 (void) ctx;
382 (void) internalFormat;
383
384 xrb->Base.Buffer = NULL;
385 rb->Width = width;
386 rb->Height = height;
387 xrb->pitch = bytes_per_line(width * xrb->bpp, 32);
388
389 return GL_TRUE;
390 }
391
392 static GLboolean
swrast_alloc_back_storage(struct gl_context * ctx,struct gl_renderbuffer * rb,GLenum internalFormat,GLuint width,GLuint height)393 swrast_alloc_back_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
394 GLenum internalFormat, GLuint width, GLuint height)
395 {
396 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
397
398 TRACE;
399
400 free(xrb->Base.Buffer);
401
402 swrast_alloc_front_storage(ctx, rb, internalFormat, width, height);
403
404 xrb->Base.Buffer = malloc(height * xrb->pitch);
405
406 return GL_TRUE;
407 }
408
409 static struct dri_swrast_renderbuffer *
swrast_new_renderbuffer(const struct gl_config * visual,__DRIdrawable * dPriv,GLboolean front)410 swrast_new_renderbuffer(const struct gl_config *visual, __DRIdrawable *dPriv,
411 GLboolean front)
412 {
413 struct dri_swrast_renderbuffer *xrb = calloc(1, sizeof *xrb);
414 struct gl_renderbuffer *rb;
415 GLuint pixel_format;
416
417 TRACE;
418
419 if (!xrb)
420 return NULL;
421
422 rb = &xrb->Base.Base;
423
424 _mesa_init_renderbuffer(rb, 0);
425
426 pixel_format = choose_pixel_format(visual);
427
428 xrb->dPriv = dPriv;
429 xrb->Base.Base.Delete = swrast_delete_renderbuffer;
430 if (front) {
431 rb->AllocStorage = swrast_alloc_front_storage;
432 }
433 else {
434 rb->AllocStorage = swrast_alloc_back_storage;
435 }
436
437 switch (pixel_format) {
438 case PF_A8R8G8B8:
439 rb->Format = MESA_FORMAT_B8G8R8A8_UNORM;
440 rb->InternalFormat = GL_RGBA;
441 rb->_BaseFormat = GL_RGBA;
442 xrb->bpp = 32;
443 break;
444 case PF_X8R8G8B8:
445 rb->Format = MESA_FORMAT_B8G8R8A8_UNORM; /* XXX */
446 rb->InternalFormat = GL_RGB;
447 rb->_BaseFormat = GL_RGB;
448 xrb->bpp = 32;
449 break;
450 case PF_R5G6B5:
451 rb->Format = MESA_FORMAT_B5G6R5_UNORM;
452 rb->InternalFormat = GL_RGB;
453 rb->_BaseFormat = GL_RGB;
454 xrb->bpp = 16;
455 break;
456 case PF_R3G3B2:
457 rb->Format = MESA_FORMAT_B2G3R3_UNORM;
458 rb->InternalFormat = GL_RGB;
459 rb->_BaseFormat = GL_RGB;
460 xrb->bpp = 8;
461 break;
462 default:
463 free(xrb);
464 return NULL;
465 }
466
467 return xrb;
468 }
469
470 static void
swrast_map_renderbuffer(struct gl_context * ctx,struct gl_renderbuffer * rb,GLuint x,GLuint y,GLuint w,GLuint h,GLbitfield mode,GLubyte ** out_map,GLint * out_stride)471 swrast_map_renderbuffer(struct gl_context *ctx,
472 struct gl_renderbuffer *rb,
473 GLuint x, GLuint y, GLuint w, GLuint h,
474 GLbitfield mode,
475 GLubyte **out_map,
476 GLint *out_stride)
477 {
478 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
479 GLubyte *map = xrb->Base.Buffer;
480 int cpp = _mesa_get_format_bytes(rb->Format);
481 int stride = rb->Width * cpp;
482
483 if (rb->AllocStorage == swrast_alloc_front_storage) {
484 __DRIdrawable *dPriv = xrb->dPriv;
485 __DRIscreen *sPriv = dPriv->driScreenPriv;
486
487 xrb->map_mode = mode;
488 xrb->map_x = x;
489 xrb->map_y = rb->Height - y - h;
490 xrb->map_w = w;
491 xrb->map_h = h;
492
493 stride = w * cpp;
494 xrb->Base.Buffer = malloc(h * stride);
495
496 sPriv->swrast_loader->getImage(dPriv, x, xrb->map_y, w, h,
497 (char *) xrb->Base.Buffer,
498 dPriv->loaderPrivate);
499
500 *out_map = xrb->Base.Buffer + (h - 1) * stride;
501 *out_stride = -stride;
502 return;
503 }
504
505 assert(xrb->Base.Buffer);
506
507 if (rb->AllocStorage == swrast_alloc_back_storage) {
508 map += (rb->Height - 1) * stride;
509 stride = -stride;
510 }
511
512 map += (GLsizei)y * stride;
513 map += (GLsizei)x * cpp;
514
515 *out_map = map;
516 *out_stride = stride;
517 }
518
519 static void
swrast_unmap_renderbuffer(struct gl_context * ctx,struct gl_renderbuffer * rb)520 swrast_unmap_renderbuffer(struct gl_context *ctx,
521 struct gl_renderbuffer *rb)
522 {
523 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
524
525 if (rb->AllocStorage == swrast_alloc_front_storage) {
526 __DRIdrawable *dPriv = xrb->dPriv;
527 __DRIscreen *sPriv = dPriv->driScreenPriv;
528
529 if (xrb->map_mode & GL_MAP_WRITE_BIT) {
530 sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_DRAW,
531 xrb->map_x, xrb->map_y,
532 xrb->map_w, xrb->map_h,
533 (char *) xrb->Base.Buffer,
534 dPriv->loaderPrivate);
535 }
536
537 free(xrb->Base.Buffer);
538 xrb->Base.Buffer = NULL;
539 }
540 }
541
542 static GLboolean
dri_create_buffer(__DRIscreen * sPriv,__DRIdrawable * dPriv,const struct gl_config * visual,GLboolean isPixmap)543 dri_create_buffer(__DRIscreen * sPriv,
544 __DRIdrawable * dPriv,
545 const struct gl_config * visual, GLboolean isPixmap)
546 {
547 struct dri_drawable *drawable = NULL;
548 struct gl_framebuffer *fb;
549 struct dri_swrast_renderbuffer *frontrb, *backrb;
550
551 TRACE;
552
553 (void) sPriv;
554 (void) isPixmap;
555
556 drawable = CALLOC_STRUCT(dri_drawable);
557 if (drawable == NULL)
558 goto drawable_fail;
559
560 dPriv->driverPrivate = drawable;
561 drawable->dPriv = dPriv;
562
563 drawable->row = malloc(SWRAST_MAX_WIDTH * 4);
564 if (drawable->row == NULL)
565 goto drawable_fail;
566
567 fb = &drawable->Base;
568
569 /* basic framebuffer setup */
570 _mesa_initialize_window_framebuffer(fb, visual);
571
572 /* add front renderbuffer */
573 frontrb = swrast_new_renderbuffer(visual, dPriv, GL_TRUE);
574 _mesa_attach_and_own_rb(fb, BUFFER_FRONT_LEFT, &frontrb->Base.Base);
575
576 /* add back renderbuffer */
577 if (visual->doubleBufferMode) {
578 backrb = swrast_new_renderbuffer(visual, dPriv, GL_FALSE);
579 _mesa_attach_and_own_rb(fb, BUFFER_BACK_LEFT, &backrb->Base.Base);
580 }
581
582 /* add software renderbuffers */
583 _swrast_add_soft_renderbuffers(fb,
584 GL_FALSE, /* color */
585 visual->haveDepthBuffer,
586 visual->haveStencilBuffer,
587 visual->haveAccumBuffer,
588 GL_FALSE, /* alpha */
589 GL_FALSE /* aux bufs */);
590
591 return GL_TRUE;
592
593 drawable_fail:
594
595 if (drawable)
596 free(drawable->row);
597
598 free(drawable);
599
600 return GL_FALSE;
601 }
602
603 static void
dri_destroy_buffer(__DRIdrawable * dPriv)604 dri_destroy_buffer(__DRIdrawable * dPriv)
605 {
606 TRACE;
607
608 if (dPriv) {
609 struct dri_drawable *drawable = dri_drawable(dPriv);
610 struct gl_framebuffer *fb;
611
612 free(drawable->row);
613
614 fb = &drawable->Base;
615
616 fb->DeletePending = GL_TRUE;
617 _mesa_reference_framebuffer(&fb, NULL);
618 }
619 }
620
621 static void
dri_swap_buffers(__DRIdrawable * dPriv)622 dri_swap_buffers(__DRIdrawable * dPriv)
623 {
624 __DRIscreen *sPriv = dPriv->driScreenPriv;
625
626 GET_CURRENT_CONTEXT(ctx);
627
628 struct dri_drawable *drawable = dri_drawable(dPriv);
629 struct gl_framebuffer *fb;
630 struct dri_swrast_renderbuffer *frontrb, *backrb;
631
632 TRACE;
633
634 fb = &drawable->Base;
635
636 frontrb =
637 dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
638 backrb =
639 dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
640
641 /* check for signle-buffered */
642 if (backrb == NULL)
643 return;
644
645 /* check if swapping currently bound buffer */
646 if (ctx && ctx->DrawBuffer == fb) {
647 /* flush pending rendering */
648 _mesa_notifySwapBuffers(ctx);
649 }
650
651 sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
652 0, 0,
653 frontrb->Base.Base.Width,
654 frontrb->Base.Base.Height,
655 (char *) backrb->Base.Buffer,
656 dPriv->loaderPrivate);
657 }
658
659
660 /**
661 * General device driver functions.
662 */
663
664 static void
get_window_size(struct gl_framebuffer * fb,GLsizei * w,GLsizei * h)665 get_window_size( struct gl_framebuffer *fb, GLsizei *w, GLsizei *h )
666 {
667 __DRIdrawable *dPriv = swrast_drawable(fb)->dPriv;
668 __DRIscreen *sPriv = dPriv->driScreenPriv;
669 int x, y;
670
671 sPriv->swrast_loader->getDrawableInfo(dPriv,
672 &x, &y, w, h,
673 dPriv->loaderPrivate);
674 }
675
676 static void
swrast_check_and_update_window_size(struct gl_context * ctx,struct gl_framebuffer * fb)677 swrast_check_and_update_window_size( struct gl_context *ctx, struct gl_framebuffer *fb )
678 {
679 GLsizei width, height;
680
681 get_window_size(fb, &width, &height);
682 if (fb->Width != width || fb->Height != height) {
683 _mesa_resize_framebuffer(ctx, fb, width, height);
684 }
685 }
686
687 static const GLubyte *
get_string(struct gl_context * ctx,GLenum pname)688 get_string(struct gl_context *ctx, GLenum pname)
689 {
690 (void) ctx;
691 switch (pname) {
692 case GL_VENDOR:
693 return (const GLubyte *) swrast_vendor_string;
694 case GL_RENDERER:
695 return (const GLubyte *) swrast_renderer_string;
696 default:
697 return NULL;
698 }
699 }
700
701 static void
update_state(struct gl_context * ctx)702 update_state(struct gl_context *ctx)
703 {
704 GLuint new_state = ctx->NewState;
705
706 if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
707 _mesa_update_draw_buffer_bounds(ctx, ctx->DrawBuffer);
708
709 /* not much to do here - pass it on */
710 _swrast_InvalidateState( ctx, new_state );
711 _swsetup_InvalidateState( ctx, new_state );
712 _tnl_InvalidateState( ctx, new_state );
713 }
714
715 static void
viewport(struct gl_context * ctx)716 viewport(struct gl_context *ctx)
717 {
718 struct gl_framebuffer *draw = ctx->WinSysDrawBuffer;
719 struct gl_framebuffer *read = ctx->WinSysReadBuffer;
720
721 swrast_check_and_update_window_size(ctx, draw);
722 swrast_check_and_update_window_size(ctx, read);
723 }
724
swrastChooseTextureFormat(struct gl_context * ctx,GLenum target,GLint internalFormat,GLenum format,GLenum type)725 static mesa_format swrastChooseTextureFormat(struct gl_context * ctx,
726 GLenum target,
727 GLint internalFormat,
728 GLenum format,
729 GLenum type)
730 {
731 if (internalFormat == GL_RGB)
732 return MESA_FORMAT_B8G8R8X8_UNORM;
733 return _mesa_choose_tex_format(ctx, target, internalFormat, format, type);
734 }
735
736 static void
swrast_init_driver_functions(struct dd_function_table * driver)737 swrast_init_driver_functions(struct dd_function_table *driver)
738 {
739 driver->GetString = get_string;
740 driver->UpdateState = update_state;
741 driver->Viewport = viewport;
742 driver->ChooseTextureFormat = swrastChooseTextureFormat;
743 driver->MapRenderbuffer = swrast_map_renderbuffer;
744 driver->UnmapRenderbuffer = swrast_unmap_renderbuffer;
745 }
746
747 /**
748 * Context-related functions.
749 */
750
751 static GLboolean
dri_create_context(gl_api api,const struct gl_config * visual,__DRIcontext * cPriv,const struct __DriverContextConfig * ctx_config,unsigned * error,void * sharedContextPrivate)752 dri_create_context(gl_api api,
753 const struct gl_config * visual,
754 __DRIcontext * cPriv,
755 const struct __DriverContextConfig *ctx_config,
756 unsigned *error,
757 void *sharedContextPrivate)
758 {
759 struct dri_context *ctx = NULL;
760 struct dri_context *share = (struct dri_context *)sharedContextPrivate;
761 struct gl_context *mesaCtx = NULL;
762 struct gl_context *sharedCtx = NULL;
763 struct dd_function_table functions;
764
765 TRACE;
766
767 /* Flag filtering is handled in dri2CreateContextAttribs.
768 */
769 (void) ctx_config->flags;
770
771 /* The swrast driver doesn't understand any of the attributes */
772 if (ctx_config->attribute_mask != 0) {
773 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
774 return false;
775 }
776
777 ctx = CALLOC_STRUCT(dri_context);
778 if (ctx == NULL) {
779 *error = __DRI_CTX_ERROR_NO_MEMORY;
780 goto context_fail;
781 }
782
783 cPriv->driverPrivate = ctx;
784 ctx->cPriv = cPriv;
785
786 /* build table of device driver functions */
787 _mesa_init_driver_functions(&functions);
788 swrast_init_driver_functions(&functions);
789
790 if (share) {
791 sharedCtx = &share->Base;
792 }
793
794 mesaCtx = &ctx->Base;
795
796 /* basic context setup */
797 if (!_mesa_initialize_context(mesaCtx, api, visual, sharedCtx, &functions)) {
798 *error = __DRI_CTX_ERROR_NO_MEMORY;
799 goto context_fail;
800 }
801
802 driContextSetFlags(mesaCtx, ctx_config->flags);
803
804 /* create module contexts */
805 _swrast_CreateContext( mesaCtx );
806 _vbo_CreateContext( mesaCtx );
807 _tnl_CreateContext( mesaCtx );
808 _swsetup_CreateContext( mesaCtx );
809 _swsetup_Wakeup( mesaCtx );
810
811 /* use default TCL pipeline */
812 {
813 TNLcontext *tnl = TNL_CONTEXT(mesaCtx);
814 tnl->Driver.RunPipeline = _tnl_run_pipeline;
815 }
816
817 _mesa_meta_init(mesaCtx);
818 _mesa_enable_sw_extensions(mesaCtx);
819
820 _mesa_override_extensions(mesaCtx);
821 _mesa_compute_version(mesaCtx);
822
823 _mesa_initialize_dispatch_tables(mesaCtx);
824 _mesa_initialize_vbo_vtxfmt(mesaCtx);
825
826 *error = __DRI_CTX_ERROR_SUCCESS;
827 return GL_TRUE;
828
829 context_fail:
830
831 free(ctx);
832
833 return GL_FALSE;
834 }
835
836 static void
dri_destroy_context(__DRIcontext * cPriv)837 dri_destroy_context(__DRIcontext * cPriv)
838 {
839 TRACE;
840
841 if (cPriv) {
842 struct dri_context *ctx = dri_context(cPriv);
843 struct gl_context *mesaCtx;
844
845 mesaCtx = &ctx->Base;
846
847 _mesa_meta_free(mesaCtx);
848 _swsetup_DestroyContext( mesaCtx );
849 _swrast_DestroyContext( mesaCtx );
850 _tnl_DestroyContext( mesaCtx );
851 _vbo_DestroyContext( mesaCtx );
852 _mesa_destroy_context( mesaCtx );
853 }
854 }
855
856 static GLboolean
dri_make_current(__DRIcontext * cPriv,__DRIdrawable * driDrawPriv,__DRIdrawable * driReadPriv)857 dri_make_current(__DRIcontext * cPriv,
858 __DRIdrawable * driDrawPriv,
859 __DRIdrawable * driReadPriv)
860 {
861 struct gl_context *mesaCtx;
862 struct gl_framebuffer *mesaDraw;
863 struct gl_framebuffer *mesaRead;
864 TRACE;
865
866 if (cPriv) {
867 struct dri_context *ctx = dri_context(cPriv);
868 struct dri_drawable *draw;
869 struct dri_drawable *read;
870
871 if (!driDrawPriv || !driReadPriv)
872 return GL_FALSE;
873
874 draw = dri_drawable(driDrawPriv);
875 read = dri_drawable(driReadPriv);
876 mesaCtx = &ctx->Base;
877 mesaDraw = &draw->Base;
878 mesaRead = &read->Base;
879
880 /* check for same context and buffer */
881 if (mesaCtx == _mesa_get_current_context()
882 && mesaCtx->DrawBuffer == mesaDraw
883 && mesaCtx->ReadBuffer == mesaRead) {
884 return GL_TRUE;
885 }
886
887 _glapi_check_multithread();
888
889 swrast_check_and_update_window_size(mesaCtx, mesaDraw);
890 if (mesaRead != mesaDraw)
891 swrast_check_and_update_window_size(mesaCtx, mesaRead);
892
893 _mesa_make_current( mesaCtx,
894 mesaDraw,
895 mesaRead );
896 }
897 else {
898 /* unbind */
899 _mesa_make_current( NULL, NULL, NULL );
900 }
901
902 return GL_TRUE;
903 }
904
905 static GLboolean
dri_unbind_context(__DRIcontext * cPriv)906 dri_unbind_context(__DRIcontext * cPriv)
907 {
908 TRACE;
909 (void) cPriv;
910
911 /* Unset current context and dispath table */
912 _mesa_make_current(NULL, NULL, NULL);
913
914 return GL_TRUE;
915 }
916
917 static void
dri_copy_sub_buffer(__DRIdrawable * dPriv,int x,int y,int w,int h)918 dri_copy_sub_buffer(__DRIdrawable *dPriv, int x, int y,
919 int w, int h)
920 {
921 __DRIscreen *sPriv = dPriv->driScreenPriv;
922 void *data;
923 int iy;
924 struct dri_drawable *drawable = dri_drawable(dPriv);
925 struct gl_framebuffer *fb;
926 struct dri_swrast_renderbuffer *frontrb, *backrb;
927
928 TRACE;
929
930 fb = &drawable->Base;
931
932 frontrb =
933 dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
934 backrb =
935 dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
936
937 /* check for signle-buffered */
938 if (backrb == NULL)
939 return;
940
941 iy = frontrb->Base.Base.Height - y - h;
942 data = (char *)backrb->Base.Buffer + (iy * backrb->pitch) + (x * ((backrb->bpp + 7) / 8));
943 sPriv->swrast_loader->putImage2(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
944 x, iy, w, h,
945 frontrb->pitch,
946 data,
947 dPriv->loaderPrivate);
948 }
949
950
951 static const struct __DriverAPIRec swrast_driver_api = {
952 .InitScreen = dri_init_screen,
953 .DestroyScreen = dri_destroy_screen,
954 .CreateContext = dri_create_context,
955 .DestroyContext = dri_destroy_context,
956 .CreateBuffer = dri_create_buffer,
957 .DestroyBuffer = dri_destroy_buffer,
958 .SwapBuffers = dri_swap_buffers,
959 .MakeCurrent = dri_make_current,
960 .UnbindContext = dri_unbind_context,
961 .CopySubBuffer = dri_copy_sub_buffer,
962 };
963
964 static const struct __DRIDriverVtableExtensionRec swrast_vtable = {
965 .base = { __DRI_DRIVER_VTABLE, 1 },
966 .vtable = &swrast_driver_api,
967 };
968
969 static const __DRIextension *swrast_driver_extensions[] = {
970 &driCoreExtension.base,
971 &driSWRastExtension.base,
972 &driCopySubBufferExtension.base,
973 &swrast_vtable.base,
974 NULL
975 };
976
__driDriverGetExtensions_swrast(void)977 PUBLIC const __DRIextension **__driDriverGetExtensions_swrast(void)
978 {
979 globalDriverAPI = &swrast_driver_api;
980
981 return swrast_driver_extensions;
982 }
983