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/fbobject.h"
40 #include "main/formats.h"
41 #include "main/framebuffer.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 #include "util/u_memory.h"
56
57 #include "main/teximage.h"
58 #include "main/texformat.h"
59 #include "main/texobj.h"
60 #include "main/texstate.h"
61
62 #include "swrast_priv.h"
63 #include "swrast/s_context.h"
64
65 #include <sys/types.h>
66 #ifdef HAVE_SYS_SYSCTL_H
67 # include <sys/sysctl.h>
68 #endif
69
70 const __DRIextension **__driDriverGetExtensions_swrast(void);
71
72 const char * const swrast_vendor_string = "Mesa Project";
73 const char * const swrast_renderer_string = "Software Rasterizer";
74
75 /**
76 * Screen and config-related functions
77 */
78
swrastSetTexBuffer2(__DRIcontext * pDRICtx,GLint target,GLint texture_format,__DRIdrawable * dPriv)79 static void swrastSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
80 GLint texture_format, __DRIdrawable *dPriv)
81 {
82 struct dri_context *dri_ctx;
83 int x, y, w, h;
84 __DRIscreen *sPriv = dPriv->driScreenPriv;
85 struct gl_texture_object *texObj;
86 struct gl_texture_image *texImage;
87 struct swrast_texture_image *swImage;
88 uint32_t internalFormat;
89 mesa_format texFormat;
90
91 dri_ctx = pDRICtx->driverPrivate;
92
93 internalFormat = (texture_format == __DRI_TEXTURE_FORMAT_RGB ? 3 : 4);
94
95 texObj = _mesa_get_current_tex_object(&dri_ctx->Base, target);
96 texImage = _mesa_get_tex_image(&dri_ctx->Base, texObj, target, 0);
97 swImage = swrast_texture_image(texImage);
98
99 _mesa_lock_texture(&dri_ctx->Base, texObj);
100
101 sPriv->swrast_loader->getDrawableInfo(dPriv, &x, &y, &w, &h, dPriv->loaderPrivate);
102
103 if (texture_format == __DRI_TEXTURE_FORMAT_RGB)
104 texFormat = MESA_FORMAT_B8G8R8X8_UNORM;
105 else
106 texFormat = MESA_FORMAT_B8G8R8A8_UNORM;
107
108 _mesa_init_teximage_fields(&dri_ctx->Base, texImage,
109 w, h, 1, 0, internalFormat, texFormat);
110
111 sPriv->swrast_loader->getImage(dPriv, x, y, w, h, (char *)swImage->Buffer,
112 dPriv->loaderPrivate);
113
114 _mesa_unlock_texture(&dri_ctx->Base, texObj);
115 }
116
swrastSetTexBuffer(__DRIcontext * pDRICtx,GLint target,__DRIdrawable * dPriv)117 static void swrastSetTexBuffer(__DRIcontext *pDRICtx, GLint target,
118 __DRIdrawable *dPriv)
119 {
120 swrastSetTexBuffer2(pDRICtx, target, __DRI_TEXTURE_FORMAT_RGBA, dPriv);
121 }
122
123 static const __DRItexBufferExtension swrastTexBufferExtension = {
124 .base = { __DRI_TEX_BUFFER, 3 },
125
126 .setTexBuffer = swrastSetTexBuffer,
127 .setTexBuffer2 = swrastSetTexBuffer2,
128 .releaseTexBuffer = NULL,
129 };
130
131
132 static int
swrast_query_renderer_integer(__DRIscreen * psp,int param,unsigned int * value)133 swrast_query_renderer_integer(__DRIscreen *psp, int param,
134 unsigned int *value)
135 {
136 switch (param) {
137 case __DRI2_RENDERER_VENDOR_ID:
138 case __DRI2_RENDERER_DEVICE_ID:
139 /* Return 0xffffffff for both vendor and device id */
140 value[0] = 0xffffffff;
141 return 0;
142 case __DRI2_RENDERER_ACCELERATED:
143 value[0] = 0;
144 return 0;
145 case __DRI2_RENDERER_VIDEO_MEMORY: {
146 /* This should probably share code with os_get_total_physical_memory()
147 * from src/gallium/auxiliary/os/os_misc.c
148 */
149 #if defined(CTL_HW) && defined(HW_MEMSIZE)
150 int mib[2] = { CTL_HW, HW_MEMSIZE };
151 unsigned long system_memory_bytes;
152 size_t len = sizeof(system_memory_bytes);
153 if (sysctl(mib, 2, &system_memory_bytes, &len, NULL, 0) != 0)
154 return -1;
155 #elif defined(_SC_PHYS_PAGES) && defined(_SC_PAGE_SIZE)
156 /* XXX: Do we want to return the full amount of system memory ? */
157 const long system_memory_pages = sysconf(_SC_PHYS_PAGES);
158 const long system_page_size = sysconf(_SC_PAGE_SIZE);
159
160 if (system_memory_pages <= 0 || system_page_size <= 0)
161 return -1;
162
163 const uint64_t system_memory_bytes = (uint64_t) system_memory_pages
164 * (uint64_t) system_page_size;
165 #else
166 #error "Unsupported platform"
167 #endif
168
169 const unsigned system_memory_megabytes =
170 (unsigned) (system_memory_bytes / (1024 * 1024));
171
172 value[0] = system_memory_megabytes;
173 return 0;
174 }
175 case __DRI2_RENDERER_UNIFIED_MEMORY_ARCHITECTURE:
176 /**
177 * XXX: Perhaps we should return 1 ?
178 * See issue #7 from the spec, currently UNRESOLVED.
179 */
180 value[0] = 0;
181 return 0;
182 default:
183 return driQueryRendererIntegerCommon(psp, param, value);
184 }
185 }
186
187 static int
swrast_query_renderer_string(__DRIscreen * psp,int param,const char ** value)188 swrast_query_renderer_string(__DRIscreen *psp, int param, const char **value)
189 {
190 switch (param) {
191 case __DRI2_RENDERER_VENDOR_ID:
192 value[0] = swrast_vendor_string;
193 return 0;
194 case __DRI2_RENDERER_DEVICE_ID:
195 value[0] = swrast_renderer_string;
196 return 0;
197 default:
198 return -1;
199 }
200 }
201
202 static const __DRI2rendererQueryExtension swrast_query_renderer_extension = {
203 .base = { __DRI2_RENDERER_QUERY, 1 },
204
205 .queryInteger = swrast_query_renderer_integer,
206 .queryString = swrast_query_renderer_string
207 };
208
209 static const __DRIextension *dri_screen_extensions[] = {
210 &swrastTexBufferExtension.base,
211 &swrast_query_renderer_extension.base,
212 &dri2ConfigQueryExtension.base,
213 &dri2NoErrorExtension.base,
214 NULL
215 };
216
217 static __DRIconfig **
swrastFillInModes(__DRIscreen * psp,unsigned pixel_bits,unsigned depth_bits,unsigned stencil_bits,GLboolean have_back_buffer)218 swrastFillInModes(__DRIscreen *psp,
219 unsigned pixel_bits, unsigned depth_bits,
220 unsigned stencil_bits, GLboolean have_back_buffer)
221 {
222 __DRIconfig **configs;
223 unsigned depth_buffer_factor;
224 unsigned back_buffer_factor;
225 mesa_format format;
226
227 static const GLenum back_buffer_modes[] = {
228 __DRI_ATTRIB_SWAP_NONE, __DRI_ATTRIB_SWAP_UNDEFINED
229 };
230
231 uint8_t depth_bits_array[4];
232 uint8_t stencil_bits_array[4];
233 uint8_t msaa_samples_array[1];
234
235 (void) psp;
236 (void) have_back_buffer;
237
238 depth_bits_array[0] = 0;
239 depth_bits_array[1] = 0;
240 depth_bits_array[2] = depth_bits;
241 depth_bits_array[3] = depth_bits;
242
243 /* Just like with the accumulation buffer, always provide some modes
244 * with a stencil buffer.
245 */
246 stencil_bits_array[0] = 0;
247 stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;
248 stencil_bits_array[2] = 0;
249 stencil_bits_array[3] = (stencil_bits == 0) ? 8 : stencil_bits;
250
251 msaa_samples_array[0] = 0;
252
253 depth_buffer_factor = 4;
254 back_buffer_factor = 2;
255
256 switch (pixel_bits) {
257 case 16:
258 format = MESA_FORMAT_B5G6R5_UNORM;
259 break;
260 case 24:
261 format = MESA_FORMAT_B8G8R8X8_UNORM;
262 break;
263 case 32:
264 format = MESA_FORMAT_B8G8R8A8_UNORM;
265 break;
266 default:
267 fprintf(stderr, "[%s:%u] bad depth %d\n", __func__, __LINE__,
268 pixel_bits);
269 return NULL;
270 }
271
272 configs = driCreateConfigs(format,
273 depth_bits_array, stencil_bits_array,
274 depth_buffer_factor, back_buffer_modes,
275 back_buffer_factor, msaa_samples_array, 1,
276 GL_TRUE, GL_FALSE, GL_FALSE);
277 if (configs == NULL) {
278 fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
279 __LINE__);
280 return NULL;
281 }
282
283 return configs;
284 }
285
286 static const __DRIconfig **
dri_init_screen(__DRIscreen * psp)287 dri_init_screen(__DRIscreen * psp)
288 {
289 __DRIconfig **configs16, **configs24, **configs32;
290
291 TRACE;
292
293 psp->max_gl_compat_version = 21;
294 psp->max_gl_es1_version = 11;
295 psp->max_gl_es2_version = 20;
296
297 psp->extensions = dri_screen_extensions;
298
299 configs16 = swrastFillInModes(psp, 16, 16, 0, 1);
300 configs24 = swrastFillInModes(psp, 24, 24, 8, 1);
301 configs32 = swrastFillInModes(psp, 32, 24, 8, 1);
302
303 configs24 = driConcatConfigs(configs16, configs24);
304 configs32 = driConcatConfigs(configs24, configs32);
305
306 return (const __DRIconfig **)configs32;
307 }
308
309 static void
dri_destroy_screen(__DRIscreen * sPriv)310 dri_destroy_screen(__DRIscreen * sPriv)
311 {
312 TRACE;
313 (void) sPriv;
314 }
315
316
317 /**
318 * Framebuffer and renderbuffer-related functions.
319 */
320
321 static GLuint
choose_pixel_format(const struct gl_config * v)322 choose_pixel_format(const struct gl_config *v)
323 {
324 int depth = v->rgbBits;
325
326 if (depth == 32
327 && v->redMask == 0xff0000
328 && v->greenMask == 0x00ff00
329 && v->blueMask == 0x0000ff)
330 return PF_A8R8G8B8;
331 else if (depth == 24
332 && v->redMask == 0xff0000
333 && v->greenMask == 0x00ff00
334 && v->blueMask == 0x0000ff)
335 return PF_X8R8G8B8;
336 else if (depth == 16
337 && v->redMask == 0xf800
338 && v->greenMask == 0x07e0
339 && v->blueMask == 0x001f)
340 return PF_R5G6B5;
341 else if (depth == 8
342 && v->redMask == 0x07
343 && v->greenMask == 0x38
344 && v->blueMask == 0xc0)
345 return PF_R3G3B2;
346
347 _mesa_problem( NULL, "unexpected format in %s", __func__ );
348 return 0;
349 }
350
351 static void
swrast_delete_renderbuffer(struct gl_context * ctx,struct gl_renderbuffer * rb)352 swrast_delete_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
353 {
354 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
355
356 TRACE;
357
358 free(xrb->Base.Buffer);
359 _mesa_delete_renderbuffer(ctx, rb);
360 }
361
362 /* see bytes_per_line in libGL */
363 static inline int
bytes_per_line(unsigned pitch_bits,unsigned mul)364 bytes_per_line(unsigned pitch_bits, unsigned mul)
365 {
366 unsigned mask = mul - 1;
367
368 return ((pitch_bits + mask) & ~mask) / 8;
369 }
370
371 static GLboolean
swrast_alloc_front_storage(struct gl_context * ctx,struct gl_renderbuffer * rb,GLenum internalFormat,GLuint width,GLuint height)372 swrast_alloc_front_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
373 GLenum internalFormat, GLuint width, GLuint height)
374 {
375 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
376
377 TRACE;
378
379 (void) ctx;
380 (void) internalFormat;
381
382 xrb->Base.Buffer = NULL;
383 rb->Width = width;
384 rb->Height = height;
385 xrb->pitch = bytes_per_line(width * xrb->bpp, 32);
386
387 return GL_TRUE;
388 }
389
390 static GLboolean
swrast_alloc_back_storage(struct gl_context * ctx,struct gl_renderbuffer * rb,GLenum internalFormat,GLuint width,GLuint height)391 swrast_alloc_back_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
392 GLenum internalFormat, GLuint width, GLuint height)
393 {
394 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
395
396 TRACE;
397
398 free(xrb->Base.Buffer);
399
400 swrast_alloc_front_storage(ctx, rb, internalFormat, width, height);
401
402 xrb->Base.Buffer = malloc(height * xrb->pitch);
403
404 return GL_TRUE;
405 }
406
407 static struct dri_swrast_renderbuffer *
swrast_new_renderbuffer(const struct gl_config * visual,__DRIdrawable * dPriv,GLboolean front)408 swrast_new_renderbuffer(const struct gl_config *visual, __DRIdrawable *dPriv,
409 GLboolean front)
410 {
411 struct dri_swrast_renderbuffer *xrb = calloc(1, sizeof *xrb);
412 struct gl_renderbuffer *rb;
413 GLuint pixel_format;
414
415 TRACE;
416
417 if (!xrb)
418 return NULL;
419
420 rb = &xrb->Base.Base;
421
422 _mesa_init_renderbuffer(rb, 0);
423
424 pixel_format = choose_pixel_format(visual);
425
426 xrb->dPriv = dPriv;
427 xrb->Base.Base.Delete = swrast_delete_renderbuffer;
428 if (front) {
429 rb->AllocStorage = swrast_alloc_front_storage;
430 }
431 else {
432 rb->AllocStorage = swrast_alloc_back_storage;
433 }
434
435 switch (pixel_format) {
436 case PF_A8R8G8B8:
437 rb->Format = MESA_FORMAT_B8G8R8A8_UNORM;
438 rb->InternalFormat = GL_RGBA;
439 rb->_BaseFormat = GL_RGBA;
440 xrb->bpp = 32;
441 break;
442 case PF_X8R8G8B8:
443 rb->Format = MESA_FORMAT_B8G8R8A8_UNORM; /* XXX */
444 rb->InternalFormat = GL_RGB;
445 rb->_BaseFormat = GL_RGB;
446 xrb->bpp = 32;
447 break;
448 case PF_R5G6B5:
449 rb->Format = MESA_FORMAT_B5G6R5_UNORM;
450 rb->InternalFormat = GL_RGB;
451 rb->_BaseFormat = GL_RGB;
452 xrb->bpp = 16;
453 break;
454 case PF_R3G3B2:
455 rb->Format = MESA_FORMAT_B2G3R3_UNORM;
456 rb->InternalFormat = GL_RGB;
457 rb->_BaseFormat = GL_RGB;
458 xrb->bpp = 8;
459 break;
460 default:
461 free(xrb);
462 return NULL;
463 }
464
465 return xrb;
466 }
467
468 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,bool flip_y)469 swrast_map_renderbuffer(struct gl_context *ctx,
470 struct gl_renderbuffer *rb,
471 GLuint x, GLuint y, GLuint w, GLuint h,
472 GLbitfield mode,
473 GLubyte **out_map,
474 GLint *out_stride,
475 bool flip_y)
476 {
477 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
478 GLubyte *map = xrb->Base.Buffer;
479 int cpp = _mesa_get_format_bytes(rb->Format);
480 int stride = rb->Width * cpp;
481
482 /* driver does not support GL_FRAMEBUFFER_FLIP_Y_MESA */
483 assert((rb->Name == 0) == flip_y);
484
485 if (rb->AllocStorage == swrast_alloc_front_storage) {
486 __DRIdrawable *dPriv = xrb->dPriv;
487 __DRIscreen *sPriv = dPriv->driScreenPriv;
488
489 xrb->map_mode = mode;
490 xrb->map_x = x;
491 xrb->map_y = rb->Height - y - h;
492 xrb->map_w = w;
493 xrb->map_h = h;
494
495 stride = w * cpp;
496 xrb->Base.Buffer = malloc(h * stride);
497
498 sPriv->swrast_loader->getImage(dPriv, x, xrb->map_y, w, h,
499 (char *) xrb->Base.Buffer,
500 dPriv->loaderPrivate);
501
502 *out_map = xrb->Base.Buffer + (h - 1) * stride;
503 *out_stride = -stride;
504 return;
505 }
506
507 assert(xrb->Base.Buffer);
508
509 if (rb->AllocStorage == swrast_alloc_back_storage) {
510 map += (rb->Height - 1) * stride;
511 stride = -stride;
512 }
513
514 map += (GLsizei)y * stride;
515 map += (GLsizei)x * cpp;
516
517 *out_map = map;
518 *out_stride = stride;
519 }
520
521 static void
swrast_unmap_renderbuffer(struct gl_context * ctx,struct gl_renderbuffer * rb)522 swrast_unmap_renderbuffer(struct gl_context *ctx,
523 struct gl_renderbuffer *rb)
524 {
525 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
526
527 if (rb->AllocStorage == swrast_alloc_front_storage) {
528 __DRIdrawable *dPriv = xrb->dPriv;
529 __DRIscreen *sPriv = dPriv->driScreenPriv;
530
531 if (xrb->map_mode & GL_MAP_WRITE_BIT) {
532 sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_DRAW,
533 xrb->map_x, xrb->map_y,
534 xrb->map_w, xrb->map_h,
535 (char *) xrb->Base.Buffer,
536 dPriv->loaderPrivate);
537 }
538
539 free(xrb->Base.Buffer);
540 xrb->Base.Buffer = NULL;
541 }
542 }
543
544 static GLboolean
dri_create_buffer(__DRIscreen * sPriv,__DRIdrawable * dPriv,const struct gl_config * visual,GLboolean isPixmap)545 dri_create_buffer(__DRIscreen * sPriv,
546 __DRIdrawable * dPriv,
547 const struct gl_config * visual, GLboolean isPixmap)
548 {
549 struct dri_drawable *drawable = NULL;
550 struct gl_framebuffer *fb;
551 struct dri_swrast_renderbuffer *frontrb, *backrb;
552
553 TRACE;
554
555 (void) sPriv;
556 (void) isPixmap;
557
558 drawable = CALLOC_STRUCT(dri_drawable);
559 if (drawable == NULL)
560 goto drawable_fail;
561
562 dPriv->driverPrivate = drawable;
563 drawable->dPriv = dPriv;
564
565 drawable->row = malloc(SWRAST_MAX_WIDTH * 4);
566 if (drawable->row == NULL)
567 goto drawable_fail;
568
569 fb = &drawable->Base;
570
571 /* basic framebuffer setup */
572 _mesa_initialize_window_framebuffer(fb, visual);
573
574 /* add front renderbuffer */
575 frontrb = swrast_new_renderbuffer(visual, dPriv, GL_TRUE);
576 _mesa_attach_and_own_rb(fb, BUFFER_FRONT_LEFT, &frontrb->Base.Base);
577
578 /* add back renderbuffer */
579 if (visual->doubleBufferMode) {
580 backrb = swrast_new_renderbuffer(visual, dPriv, GL_FALSE);
581 _mesa_attach_and_own_rb(fb, BUFFER_BACK_LEFT, &backrb->Base.Base);
582 }
583
584 /* add software renderbuffers */
585 _swrast_add_soft_renderbuffers(fb,
586 GL_FALSE, /* color */
587 visual->depthBits > 0,
588 visual->stencilBits > 0,
589 visual->accumRedBits > 0,
590 GL_FALSE, /* alpha */
591 GL_FALSE /* aux bufs */);
592
593 return GL_TRUE;
594
595 drawable_fail:
596
597 if (drawable)
598 free(drawable->row);
599
600 free(drawable);
601
602 return GL_FALSE;
603 }
604
605 static void
dri_destroy_buffer(__DRIdrawable * dPriv)606 dri_destroy_buffer(__DRIdrawable * dPriv)
607 {
608 TRACE;
609
610 if (dPriv) {
611 struct dri_drawable *drawable = dri_drawable(dPriv);
612 struct gl_framebuffer *fb;
613
614 free(drawable->row);
615
616 fb = &drawable->Base;
617
618 fb->DeletePending = GL_TRUE;
619 _mesa_reference_framebuffer(&fb, NULL);
620 }
621 }
622
623 static void
dri_swap_buffers(__DRIdrawable * dPriv)624 dri_swap_buffers(__DRIdrawable * dPriv)
625 {
626 __DRIscreen *sPriv = dPriv->driScreenPriv;
627
628 GET_CURRENT_CONTEXT(ctx);
629
630 struct dri_drawable *drawable = dri_drawable(dPriv);
631 struct gl_framebuffer *fb;
632 struct dri_swrast_renderbuffer *frontrb, *backrb;
633
634 TRACE;
635
636 fb = &drawable->Base;
637
638 frontrb =
639 dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
640 backrb =
641 dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
642
643 /* check for signle-buffered */
644 if (backrb == NULL)
645 return;
646
647 /* check if swapping currently bound buffer */
648 if (ctx && ctx->DrawBuffer == fb) {
649 /* flush pending rendering */
650 _mesa_notifySwapBuffers(ctx);
651 }
652
653 sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
654 0, 0,
655 frontrb->Base.Base.Width,
656 frontrb->Base.Base.Height,
657 (char *) backrb->Base.Buffer,
658 dPriv->loaderPrivate);
659 }
660
661
662 /**
663 * General device driver functions.
664 */
665
666 static void
get_window_size(struct gl_framebuffer * fb,GLsizei * w,GLsizei * h)667 get_window_size( struct gl_framebuffer *fb, GLsizei *w, GLsizei *h )
668 {
669 __DRIdrawable *dPriv = swrast_drawable(fb)->dPriv;
670 __DRIscreen *sPriv = dPriv->driScreenPriv;
671 int x, y;
672
673 sPriv->swrast_loader->getDrawableInfo(dPriv,
674 &x, &y, w, h,
675 dPriv->loaderPrivate);
676 }
677
678 static void
swrast_check_and_update_window_size(struct gl_context * ctx,struct gl_framebuffer * fb)679 swrast_check_and_update_window_size( struct gl_context *ctx, struct gl_framebuffer *fb )
680 {
681 GLsizei width, height;
682
683 if (!fb || fb == _mesa_get_incomplete_framebuffer())
684 return;
685
686 get_window_size(fb, &width, &height);
687 if (fb->Width != width || fb->Height != height) {
688 _mesa_resize_framebuffer(ctx, fb, width, height);
689 }
690 }
691
692 static const GLubyte *
get_string(struct gl_context * ctx,GLenum pname)693 get_string(struct gl_context *ctx, GLenum pname)
694 {
695 (void) ctx;
696 switch (pname) {
697 case GL_VENDOR:
698 return (const GLubyte *) swrast_vendor_string;
699 case GL_RENDERER:
700 return (const GLubyte *) swrast_renderer_string;
701 default:
702 return NULL;
703 }
704 }
705
706 static void
update_state(struct gl_context * ctx)707 update_state(struct gl_context *ctx)
708 {
709 GLuint new_state = ctx->NewState;
710
711 if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
712 _mesa_update_draw_buffer_bounds(ctx, ctx->DrawBuffer);
713
714 /* not much to do here - pass it on */
715 _swrast_InvalidateState( ctx, new_state );
716 _swsetup_InvalidateState( ctx, new_state );
717 _tnl_InvalidateState( ctx, new_state );
718 }
719
720 static void
viewport(struct gl_context * ctx)721 viewport(struct gl_context *ctx)
722 {
723 struct gl_framebuffer *draw = ctx->WinSysDrawBuffer;
724 struct gl_framebuffer *read = ctx->WinSysReadBuffer;
725
726 swrast_check_and_update_window_size(ctx, draw);
727 swrast_check_and_update_window_size(ctx, read);
728 }
729
swrastChooseTextureFormat(struct gl_context * ctx,GLenum target,GLint internalFormat,GLenum format,GLenum type)730 static mesa_format swrastChooseTextureFormat(struct gl_context * ctx,
731 GLenum target,
732 GLint internalFormat,
733 GLenum format,
734 GLenum type)
735 {
736 if (internalFormat == GL_RGB)
737 return MESA_FORMAT_B8G8R8X8_UNORM;
738 return _mesa_choose_tex_format(ctx, target, internalFormat, format, type);
739 }
740
741 static void
swrast_init_driver_functions(struct dd_function_table * driver)742 swrast_init_driver_functions(struct dd_function_table *driver)
743 {
744 driver->GetString = get_string;
745 driver->UpdateState = update_state;
746 driver->Viewport = viewport;
747 driver->ChooseTextureFormat = swrastChooseTextureFormat;
748 driver->MapRenderbuffer = swrast_map_renderbuffer;
749 driver->UnmapRenderbuffer = swrast_unmap_renderbuffer;
750 }
751
752 /**
753 * Context-related functions.
754 */
755
756 static GLboolean
dri_create_context(gl_api api,const struct gl_config * visual,__DRIcontext * cPriv,const struct __DriverContextConfig * ctx_config,unsigned * error,void * sharedContextPrivate)757 dri_create_context(gl_api api,
758 const struct gl_config * visual,
759 __DRIcontext * cPriv,
760 const struct __DriverContextConfig *ctx_config,
761 unsigned *error,
762 void *sharedContextPrivate)
763 {
764 struct dri_context *ctx = NULL;
765 struct dri_context *share = (struct dri_context *)sharedContextPrivate;
766 struct gl_context *mesaCtx = NULL;
767 struct gl_context *sharedCtx = NULL;
768 struct dd_function_table functions;
769
770 TRACE;
771
772 /* Flag filtering is handled in dri2CreateContextAttribs.
773 */
774 (void) ctx_config->flags;
775
776 /* The swrast driver doesn't understand any of the attributes */
777 if (ctx_config->attribute_mask != 0) {
778 *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
779 return false;
780 }
781
782 ctx = CALLOC_STRUCT(dri_context);
783 if (ctx == NULL) {
784 *error = __DRI_CTX_ERROR_NO_MEMORY;
785 goto context_fail;
786 }
787
788 cPriv->driverPrivate = ctx;
789 ctx->cPriv = cPriv;
790
791 /* build table of device driver functions */
792 _mesa_init_driver_functions(&functions);
793 swrast_init_driver_functions(&functions);
794 _tnl_init_driver_draw_function(&functions);
795
796 if (share) {
797 sharedCtx = &share->Base;
798 }
799
800 mesaCtx = &ctx->Base;
801
802 /* basic context setup */
803 if (!_mesa_initialize_context(mesaCtx, api, visual, sharedCtx, &functions)) {
804 *error = __DRI_CTX_ERROR_NO_MEMORY;
805 goto context_fail;
806 }
807
808 driContextSetFlags(mesaCtx, ctx_config->flags);
809
810 /* create module contexts */
811 _swrast_CreateContext( mesaCtx );
812 _vbo_CreateContext( mesaCtx, false );
813 _tnl_CreateContext( mesaCtx );
814 _swsetup_CreateContext( mesaCtx );
815 _swsetup_Wakeup( mesaCtx );
816
817 /* use default TCL pipeline */
818 {
819 TNLcontext *tnl = TNL_CONTEXT(mesaCtx);
820 tnl->Driver.RunPipeline = _tnl_run_pipeline;
821 }
822
823 _mesa_meta_init(mesaCtx);
824 _mesa_enable_sw_extensions(mesaCtx);
825
826 _mesa_override_extensions(mesaCtx);
827 _mesa_compute_version(mesaCtx);
828
829 _mesa_initialize_dispatch_tables(mesaCtx);
830 _mesa_initialize_vbo_vtxfmt(mesaCtx);
831
832 *error = __DRI_CTX_ERROR_SUCCESS;
833 return GL_TRUE;
834
835 context_fail:
836
837 free(ctx);
838
839 return GL_FALSE;
840 }
841
842 static void
dri_destroy_context(__DRIcontext * cPriv)843 dri_destroy_context(__DRIcontext * cPriv)
844 {
845 TRACE;
846
847 if (cPriv) {
848 struct dri_context *ctx = dri_context(cPriv);
849 struct gl_context *mesaCtx;
850
851 mesaCtx = &ctx->Base;
852
853 _mesa_meta_free(mesaCtx);
854 _swsetup_DestroyContext( mesaCtx );
855 _swrast_DestroyContext( mesaCtx );
856 _tnl_DestroyContext( mesaCtx );
857 _vbo_DestroyContext( mesaCtx );
858 _mesa_destroy_context( mesaCtx );
859 }
860 }
861
862 static GLboolean
dri_make_current(__DRIcontext * cPriv,__DRIdrawable * driDrawPriv,__DRIdrawable * driReadPriv)863 dri_make_current(__DRIcontext * cPriv,
864 __DRIdrawable * driDrawPriv,
865 __DRIdrawable * driReadPriv)
866 {
867 struct gl_context *mesaCtx;
868 struct gl_framebuffer *mesaDraw = NULL;
869 struct gl_framebuffer *mesaRead = NULL;
870 TRACE;
871
872 if (cPriv) {
873 mesaCtx = &dri_context(cPriv)->Base;
874
875 if (driDrawPriv && driReadPriv) {
876 struct dri_drawable *draw = dri_drawable(driDrawPriv);
877 struct dri_drawable *read = dri_drawable(driReadPriv);
878 mesaDraw = &draw->Base;
879 mesaRead = &read->Base;
880 }
881 else {
882 struct gl_framebuffer *incomplete
883 = _mesa_get_incomplete_framebuffer();
884 mesaDraw = incomplete;
885 mesaRead = incomplete;
886 }
887
888 /* check for same context and buffer */
889 if (mesaCtx == _mesa_get_current_context()
890 && mesaCtx->DrawBuffer == mesaDraw
891 && mesaCtx->ReadBuffer == mesaRead) {
892 return GL_TRUE;
893 }
894
895 swrast_check_and_update_window_size(mesaCtx, mesaDraw);
896 if (mesaRead != mesaDraw)
897 swrast_check_and_update_window_size(mesaCtx, mesaRead);
898
899 _mesa_make_current( mesaCtx,
900 mesaDraw,
901 mesaRead );
902 }
903 else {
904 /* unbind */
905 _mesa_make_current( NULL, NULL, NULL );
906 }
907
908 return GL_TRUE;
909 }
910
911 static GLboolean
dri_unbind_context(__DRIcontext * cPriv)912 dri_unbind_context(__DRIcontext * cPriv)
913 {
914 TRACE;
915 (void) cPriv;
916
917 /* Unset current context and dispath table */
918 _mesa_make_current(NULL, NULL, NULL);
919
920 return GL_TRUE;
921 }
922
923 static void
dri_copy_sub_buffer(__DRIdrawable * dPriv,int x,int y,int w,int h)924 dri_copy_sub_buffer(__DRIdrawable *dPriv, int x, int y,
925 int w, int h)
926 {
927 __DRIscreen *sPriv = dPriv->driScreenPriv;
928 void *data;
929 int iy;
930 struct dri_drawable *drawable = dri_drawable(dPriv);
931 struct gl_framebuffer *fb;
932 struct dri_swrast_renderbuffer *frontrb, *backrb;
933
934 TRACE;
935
936 fb = &drawable->Base;
937
938 frontrb =
939 dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
940 backrb =
941 dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
942
943 /* check for signle-buffered */
944 if (backrb == NULL)
945 return;
946
947 iy = frontrb->Base.Base.Height - y - h;
948 data = (char *)backrb->Base.Buffer + (iy * backrb->pitch) + (x * ((backrb->bpp + 7) / 8));
949 sPriv->swrast_loader->putImage2(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
950 x, iy, w, h,
951 frontrb->pitch,
952 data,
953 dPriv->loaderPrivate);
954 }
955
956
957 static const struct __DriverAPIRec swrast_driver_api = {
958 .InitScreen = dri_init_screen,
959 .DestroyScreen = dri_destroy_screen,
960 .CreateContext = dri_create_context,
961 .DestroyContext = dri_destroy_context,
962 .CreateBuffer = dri_create_buffer,
963 .DestroyBuffer = dri_destroy_buffer,
964 .SwapBuffers = dri_swap_buffers,
965 .MakeCurrent = dri_make_current,
966 .UnbindContext = dri_unbind_context,
967 .CopySubBuffer = dri_copy_sub_buffer,
968 };
969
970 static const struct __DRIDriverVtableExtensionRec swrast_vtable = {
971 .base = { __DRI_DRIVER_VTABLE, 1 },
972 .vtable = &swrast_driver_api,
973 };
974
975 static const __DRIextension *swrast_driver_extensions[] = {
976 &driCoreExtension.base,
977 &driSWRastExtension.base,
978 &driCopySubBufferExtension.base,
979 &swrast_vtable.base,
980 NULL
981 };
982
__driDriverGetExtensions_swrast(void)983 PUBLIC const __DRIextension **__driDriverGetExtensions_swrast(void)
984 {
985 globalDriverAPI = &swrast_driver_api;
986
987 return swrast_driver_extensions;
988 }
989