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 NULL
212 };
213
214 static __DRIconfig **
swrastFillInModes(__DRIscreen * psp,unsigned pixel_bits,unsigned depth_bits,unsigned stencil_bits,GLboolean have_back_buffer)215 swrastFillInModes(__DRIscreen *psp,
216 unsigned pixel_bits, unsigned depth_bits,
217 unsigned stencil_bits, GLboolean have_back_buffer)
218 {
219 __DRIconfig **configs;
220 unsigned depth_buffer_factor;
221 unsigned back_buffer_factor;
222 mesa_format format;
223
224 /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
225 * support pageflipping at all.
226 */
227 static const GLenum back_buffer_modes[] = {
228 GLX_NONE, GLX_SWAP_UNDEFINED_OML
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);
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)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 {
476 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
477 GLubyte *map = xrb->Base.Buffer;
478 int cpp = _mesa_get_format_bytes(rb->Format);
479 int stride = rb->Width * cpp;
480
481 if (rb->AllocStorage == swrast_alloc_front_storage) {
482 __DRIdrawable *dPriv = xrb->dPriv;
483 __DRIscreen *sPriv = dPriv->driScreenPriv;
484
485 xrb->map_mode = mode;
486 xrb->map_x = x;
487 xrb->map_y = rb->Height - y - h;
488 xrb->map_w = w;
489 xrb->map_h = h;
490
491 stride = w * cpp;
492 xrb->Base.Buffer = malloc(h * stride);
493
494 sPriv->swrast_loader->getImage(dPriv, x, xrb->map_y, w, h,
495 (char *) xrb->Base.Buffer,
496 dPriv->loaderPrivate);
497
498 *out_map = xrb->Base.Buffer + (h - 1) * stride;
499 *out_stride = -stride;
500 return;
501 }
502
503 assert(xrb->Base.Buffer);
504
505 if (rb->AllocStorage == swrast_alloc_back_storage) {
506 map += (rb->Height - 1) * stride;
507 stride = -stride;
508 }
509
510 map += (GLsizei)y * stride;
511 map += (GLsizei)x * cpp;
512
513 *out_map = map;
514 *out_stride = stride;
515 }
516
517 static void
swrast_unmap_renderbuffer(struct gl_context * ctx,struct gl_renderbuffer * rb)518 swrast_unmap_renderbuffer(struct gl_context *ctx,
519 struct gl_renderbuffer *rb)
520 {
521 struct dri_swrast_renderbuffer *xrb = dri_swrast_renderbuffer(rb);
522
523 if (rb->AllocStorage == swrast_alloc_front_storage) {
524 __DRIdrawable *dPriv = xrb->dPriv;
525 __DRIscreen *sPriv = dPriv->driScreenPriv;
526
527 if (xrb->map_mode & GL_MAP_WRITE_BIT) {
528 sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_DRAW,
529 xrb->map_x, xrb->map_y,
530 xrb->map_w, xrb->map_h,
531 (char *) xrb->Base.Buffer,
532 dPriv->loaderPrivate);
533 }
534
535 free(xrb->Base.Buffer);
536 xrb->Base.Buffer = NULL;
537 }
538 }
539
540 static GLboolean
dri_create_buffer(__DRIscreen * sPriv,__DRIdrawable * dPriv,const struct gl_config * visual,GLboolean isPixmap)541 dri_create_buffer(__DRIscreen * sPriv,
542 __DRIdrawable * dPriv,
543 const struct gl_config * visual, GLboolean isPixmap)
544 {
545 struct dri_drawable *drawable = NULL;
546 struct gl_framebuffer *fb;
547 struct dri_swrast_renderbuffer *frontrb, *backrb;
548
549 TRACE;
550
551 (void) sPriv;
552 (void) isPixmap;
553
554 drawable = CALLOC_STRUCT(dri_drawable);
555 if (drawable == NULL)
556 goto drawable_fail;
557
558 dPriv->driverPrivate = drawable;
559 drawable->dPriv = dPriv;
560
561 drawable->row = malloc(SWRAST_MAX_WIDTH * 4);
562 if (drawable->row == NULL)
563 goto drawable_fail;
564
565 fb = &drawable->Base;
566
567 /* basic framebuffer setup */
568 _mesa_initialize_window_framebuffer(fb, visual);
569
570 /* add front renderbuffer */
571 frontrb = swrast_new_renderbuffer(visual, dPriv, GL_TRUE);
572 _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontrb->Base.Base);
573
574 /* add back renderbuffer */
575 if (visual->doubleBufferMode) {
576 backrb = swrast_new_renderbuffer(visual, dPriv, GL_FALSE);
577 _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backrb->Base.Base);
578 }
579
580 /* add software renderbuffers */
581 _swrast_add_soft_renderbuffers(fb,
582 GL_FALSE, /* color */
583 visual->haveDepthBuffer,
584 visual->haveStencilBuffer,
585 visual->haveAccumBuffer,
586 GL_FALSE, /* alpha */
587 GL_FALSE /* aux bufs */);
588
589 return GL_TRUE;
590
591 drawable_fail:
592
593 if (drawable)
594 free(drawable->row);
595
596 free(drawable);
597
598 return GL_FALSE;
599 }
600
601 static void
dri_destroy_buffer(__DRIdrawable * dPriv)602 dri_destroy_buffer(__DRIdrawable * dPriv)
603 {
604 TRACE;
605
606 if (dPriv) {
607 struct dri_drawable *drawable = dri_drawable(dPriv);
608 struct gl_framebuffer *fb;
609
610 free(drawable->row);
611
612 fb = &drawable->Base;
613
614 fb->DeletePending = GL_TRUE;
615 _mesa_reference_framebuffer(&fb, NULL);
616 }
617 }
618
619 static void
dri_swap_buffers(__DRIdrawable * dPriv)620 dri_swap_buffers(__DRIdrawable * dPriv)
621 {
622 __DRIscreen *sPriv = dPriv->driScreenPriv;
623
624 GET_CURRENT_CONTEXT(ctx);
625
626 struct dri_drawable *drawable = dri_drawable(dPriv);
627 struct gl_framebuffer *fb;
628 struct dri_swrast_renderbuffer *frontrb, *backrb;
629
630 TRACE;
631
632 fb = &drawable->Base;
633
634 frontrb =
635 dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
636 backrb =
637 dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
638
639 /* check for signle-buffered */
640 if (backrb == NULL)
641 return;
642
643 /* check if swapping currently bound buffer */
644 if (ctx && ctx->DrawBuffer == fb) {
645 /* flush pending rendering */
646 _mesa_notifySwapBuffers(ctx);
647 }
648
649 sPriv->swrast_loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
650 0, 0,
651 frontrb->Base.Base.Width,
652 frontrb->Base.Base.Height,
653 (char *) backrb->Base.Buffer,
654 dPriv->loaderPrivate);
655 }
656
657
658 /**
659 * General device driver functions.
660 */
661
662 static void
get_window_size(struct gl_framebuffer * fb,GLsizei * w,GLsizei * h)663 get_window_size( struct gl_framebuffer *fb, GLsizei *w, GLsizei *h )
664 {
665 __DRIdrawable *dPriv = swrast_drawable(fb)->dPriv;
666 __DRIscreen *sPriv = dPriv->driScreenPriv;
667 int x, y;
668
669 sPriv->swrast_loader->getDrawableInfo(dPriv,
670 &x, &y, w, h,
671 dPriv->loaderPrivate);
672 }
673
674 static void
swrast_check_and_update_window_size(struct gl_context * ctx,struct gl_framebuffer * fb)675 swrast_check_and_update_window_size( struct gl_context *ctx, struct gl_framebuffer *fb )
676 {
677 GLsizei width, height;
678
679 get_window_size(fb, &width, &height);
680 if (fb->Width != width || fb->Height != height) {
681 _mesa_resize_framebuffer(ctx, fb, width, height);
682 }
683 }
684
685 static const GLubyte *
get_string(struct gl_context * ctx,GLenum pname)686 get_string(struct gl_context *ctx, GLenum pname)
687 {
688 (void) ctx;
689 switch (pname) {
690 case GL_VENDOR:
691 return (const GLubyte *) swrast_vendor_string;
692 case GL_RENDERER:
693 return (const GLubyte *) swrast_renderer_string;
694 default:
695 return NULL;
696 }
697 }
698
699 static void
update_state(struct gl_context * ctx,GLuint new_state)700 update_state( struct gl_context *ctx, GLuint new_state )
701 {
702 /* not much to do here - pass it on */
703 _swrast_InvalidateState( ctx, new_state );
704 _swsetup_InvalidateState( ctx, new_state );
705 _vbo_InvalidateState( ctx, new_state );
706 _tnl_InvalidateState( ctx, new_state );
707 }
708
709 static void
viewport(struct gl_context * ctx)710 viewport(struct gl_context *ctx)
711 {
712 struct gl_framebuffer *draw = ctx->WinSysDrawBuffer;
713 struct gl_framebuffer *read = ctx->WinSysReadBuffer;
714
715 swrast_check_and_update_window_size(ctx, draw);
716 swrast_check_and_update_window_size(ctx, read);
717 }
718
swrastChooseTextureFormat(struct gl_context * ctx,GLenum target,GLint internalFormat,GLenum format,GLenum type)719 static mesa_format swrastChooseTextureFormat(struct gl_context * ctx,
720 GLenum target,
721 GLint internalFormat,
722 GLenum format,
723 GLenum type)
724 {
725 if (internalFormat == GL_RGB)
726 return MESA_FORMAT_B8G8R8X8_UNORM;
727 return _mesa_choose_tex_format(ctx, target, internalFormat, format, type);
728 }
729
730 static void
swrast_init_driver_functions(struct dd_function_table * driver)731 swrast_init_driver_functions(struct dd_function_table *driver)
732 {
733 driver->GetString = get_string;
734 driver->UpdateState = update_state;
735 driver->Viewport = viewport;
736 driver->ChooseTextureFormat = swrastChooseTextureFormat;
737 driver->MapRenderbuffer = swrast_map_renderbuffer;
738 driver->UnmapRenderbuffer = swrast_unmap_renderbuffer;
739 }
740
741 /**
742 * Context-related functions.
743 */
744
745 static GLboolean
dri_create_context(gl_api api,const struct gl_config * visual,__DRIcontext * cPriv,unsigned major_version,unsigned minor_version,uint32_t flags,bool notify_reset,unsigned * error,void * sharedContextPrivate)746 dri_create_context(gl_api api,
747 const struct gl_config * visual,
748 __DRIcontext * cPriv,
749 unsigned major_version,
750 unsigned minor_version,
751 uint32_t flags,
752 bool notify_reset,
753 unsigned *error,
754 void *sharedContextPrivate)
755 {
756 struct dri_context *ctx = NULL;
757 struct dri_context *share = (struct dri_context *)sharedContextPrivate;
758 struct gl_context *mesaCtx = NULL;
759 struct gl_context *sharedCtx = NULL;
760 struct dd_function_table functions;
761
762 TRACE;
763
764 /* Flag filtering is handled in dri2CreateContextAttribs.
765 */
766 (void) flags;
767
768 ctx = CALLOC_STRUCT(dri_context);
769 if (ctx == NULL) {
770 *error = __DRI_CTX_ERROR_NO_MEMORY;
771 goto context_fail;
772 }
773
774 cPriv->driverPrivate = ctx;
775 ctx->cPriv = cPriv;
776
777 /* build table of device driver functions */
778 _mesa_init_driver_functions(&functions);
779 swrast_init_driver_functions(&functions);
780
781 if (share) {
782 sharedCtx = &share->Base;
783 }
784
785 mesaCtx = &ctx->Base;
786
787 /* basic context setup */
788 if (!_mesa_initialize_context(mesaCtx, api, visual, sharedCtx, &functions)) {
789 *error = __DRI_CTX_ERROR_NO_MEMORY;
790 goto context_fail;
791 }
792
793 driContextSetFlags(mesaCtx, flags);
794
795 /* create module contexts */
796 _swrast_CreateContext( mesaCtx );
797 _vbo_CreateContext( mesaCtx );
798 _tnl_CreateContext( mesaCtx );
799 _swsetup_CreateContext( mesaCtx );
800 _swsetup_Wakeup( mesaCtx );
801
802 /* use default TCL pipeline */
803 {
804 TNLcontext *tnl = TNL_CONTEXT(mesaCtx);
805 tnl->Driver.RunPipeline = _tnl_run_pipeline;
806 }
807
808 _mesa_meta_init(mesaCtx);
809 _mesa_enable_sw_extensions(mesaCtx);
810
811 _mesa_compute_version(mesaCtx);
812
813 _mesa_initialize_dispatch_tables(mesaCtx);
814 _mesa_initialize_vbo_vtxfmt(mesaCtx);
815
816 *error = __DRI_CTX_ERROR_SUCCESS;
817 return GL_TRUE;
818
819 context_fail:
820
821 free(ctx);
822
823 return GL_FALSE;
824 }
825
826 static void
dri_destroy_context(__DRIcontext * cPriv)827 dri_destroy_context(__DRIcontext * cPriv)
828 {
829 TRACE;
830
831 if (cPriv) {
832 struct dri_context *ctx = dri_context(cPriv);
833 struct gl_context *mesaCtx;
834
835 mesaCtx = &ctx->Base;
836
837 _mesa_meta_free(mesaCtx);
838 _swsetup_DestroyContext( mesaCtx );
839 _swrast_DestroyContext( mesaCtx );
840 _tnl_DestroyContext( mesaCtx );
841 _vbo_DestroyContext( mesaCtx );
842 _mesa_destroy_context( mesaCtx );
843 }
844 }
845
846 static GLboolean
dri_make_current(__DRIcontext * cPriv,__DRIdrawable * driDrawPriv,__DRIdrawable * driReadPriv)847 dri_make_current(__DRIcontext * cPriv,
848 __DRIdrawable * driDrawPriv,
849 __DRIdrawable * driReadPriv)
850 {
851 struct gl_context *mesaCtx;
852 struct gl_framebuffer *mesaDraw;
853 struct gl_framebuffer *mesaRead;
854 TRACE;
855
856 if (cPriv) {
857 struct dri_context *ctx = dri_context(cPriv);
858 struct dri_drawable *draw;
859 struct dri_drawable *read;
860
861 if (!driDrawPriv || !driReadPriv)
862 return GL_FALSE;
863
864 draw = dri_drawable(driDrawPriv);
865 read = dri_drawable(driReadPriv);
866 mesaCtx = &ctx->Base;
867 mesaDraw = &draw->Base;
868 mesaRead = &read->Base;
869
870 /* check for same context and buffer */
871 if (mesaCtx == _mesa_get_current_context()
872 && mesaCtx->DrawBuffer == mesaDraw
873 && mesaCtx->ReadBuffer == mesaRead) {
874 return GL_TRUE;
875 }
876
877 _glapi_check_multithread();
878
879 swrast_check_and_update_window_size(mesaCtx, mesaDraw);
880 if (mesaRead != mesaDraw)
881 swrast_check_and_update_window_size(mesaCtx, mesaRead);
882
883 _mesa_make_current( mesaCtx,
884 mesaDraw,
885 mesaRead );
886 }
887 else {
888 /* unbind */
889 _mesa_make_current( NULL, NULL, NULL );
890 }
891
892 return GL_TRUE;
893 }
894
895 static GLboolean
dri_unbind_context(__DRIcontext * cPriv)896 dri_unbind_context(__DRIcontext * cPriv)
897 {
898 TRACE;
899 (void) cPriv;
900
901 /* Unset current context and dispath table */
902 _mesa_make_current(NULL, NULL, NULL);
903
904 return GL_TRUE;
905 }
906
907 static void
dri_copy_sub_buffer(__DRIdrawable * dPriv,int x,int y,int w,int h)908 dri_copy_sub_buffer(__DRIdrawable *dPriv, int x, int y,
909 int w, int h)
910 {
911 __DRIscreen *sPriv = dPriv->driScreenPriv;
912 void *data;
913 int iy;
914 struct dri_drawable *drawable = dri_drawable(dPriv);
915 struct gl_framebuffer *fb;
916 struct dri_swrast_renderbuffer *frontrb, *backrb;
917
918 TRACE;
919
920 fb = &drawable->Base;
921
922 frontrb =
923 dri_swrast_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
924 backrb =
925 dri_swrast_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
926
927 /* check for signle-buffered */
928 if (backrb == NULL)
929 return;
930
931 iy = frontrb->Base.Base.Height - y - h;
932 data = (char *)backrb->Base.Buffer + (iy * backrb->pitch) + (x * ((backrb->bpp + 7) / 8));
933 sPriv->swrast_loader->putImage2(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
934 x, iy, w, h,
935 frontrb->pitch,
936 data,
937 dPriv->loaderPrivate);
938 }
939
940
941 static const struct __DriverAPIRec swrast_driver_api = {
942 .InitScreen = dri_init_screen,
943 .DestroyScreen = dri_destroy_screen,
944 .CreateContext = dri_create_context,
945 .DestroyContext = dri_destroy_context,
946 .CreateBuffer = dri_create_buffer,
947 .DestroyBuffer = dri_destroy_buffer,
948 .SwapBuffers = dri_swap_buffers,
949 .MakeCurrent = dri_make_current,
950 .UnbindContext = dri_unbind_context,
951 .CopySubBuffer = dri_copy_sub_buffer,
952 };
953
954 static const struct __DRIDriverVtableExtensionRec swrast_vtable = {
955 .base = { __DRI_DRIVER_VTABLE, 1 },
956 .vtable = &swrast_driver_api,
957 };
958
959 static const __DRIextension *swrast_driver_extensions[] = {
960 &driCoreExtension.base,
961 &driSWRastExtension.base,
962 &driCopySubBufferExtension.base,
963 &dri2ConfigQueryExtension.base,
964 &swrast_vtable.base,
965 NULL
966 };
967
__driDriverGetExtensions_swrast(void)968 PUBLIC const __DRIextension **__driDriverGetExtensions_swrast(void)
969 {
970 globalDriverAPI = &swrast_driver_api;
971
972 return swrast_driver_extensions;
973 }
974