vboxdri_drv.c@ 34418

最後變更在這個檔案從34418是 33540,由 vboxsync 提交於 14 年前
*: spelling fixes, thanks Timeless!
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1	/*
2	* Mesa 3-D graphics library
3	* Version: 6.3
4	*
5	* Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
6	*
7	* Permission is hereby granted, free of charge, to any person obtaining a
8	* copy of this software and associated documentation files (the "Software"),
9	* to deal in the Software without restriction, including without limitation
10	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
11	* and/or sell copies of the Software, and to permit persons to whom the
12	* Software is furnished to do so, subject to the following conditions:
13	*
14	* The above copyright notice and this permission notice shall be included
15	* in all copies or substantial portions of the Software.
16	*
17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20	* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21	* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23	*/
24
25	/* Minimal swrast-based dri loadable driver.
26	*
27	* Todo:
28	* -- Use malloced (rather than framebuffer) memory for backbuffer
29	* -- 32bpp is hardwired -- fix
30	*
31	* NOTES:
32	* -- No mechanism for cliprects or resize notification --
33	* assumes this is a fullscreen device.
34	* -- No locking -- assumes this is the only driver accessing this
35	* device.
36	* -- Doesn't (yet) make use of any acceleration or other interfaces
37	* provided by fb. Would be entirely happy working against any
38	* fullscreen interface.
39	* -- HOWEVER: only a small number of pixelformats are supported, and
40	* the mechanism for choosing between them makes some assumptions
41	* that may not be valid everywhere.
42	*/
43
44	#include "driver.h"
45	#include "drm.h"
46	#include "utils.h"
47	#include "drirenderbuffer.h"
48
49	#include "buffers.h"
50	#include "extensions.h"
51	#include "framebuffer.h"
52	#include "renderbuffer.h"
53	#include "vbo/vbo.h"
54	#include "swrast/swrast.h"
55	#include "swrast_setup/swrast_setup.h"
56	#include "tnl/tnl.h"
57	#include "tnl/t_context.h"
58	#include "tnl/t_pipeline.h"
59	#include "drivers/common/driverfuncs.h"
60
61	#define need_GL_VERSION_1_3
62	#define need_GL_VERSION_1_4
63	#define need_GL_VERSION_1_5
64	#define need_GL_VERSION_2_0
65	#define need_GL_VERSION_2_1
66
67	/* sw extensions for imaging */
68	#define need_GL_EXT_blend_color
69	#define need_GL_EXT_blend_minmax
70	#define need_GL_EXT_convolution
71	#define need_GL_EXT_histogram
72	#define need_GL_SGI_color_table
73
74	/* sw extensions not associated with some GL version */
75	#define need_GL_ARB_shader_objects
76	#define need_GL_ARB_vertex_program
77	#define need_GL_APPLE_vertex_array_object
78	#define need_GL_ATI_fragment_shader
79	#define need_GL_EXT_depth_bounds_test
80	#define need_GL_EXT_framebuffer_object
81	#define need_GL_EXT_framebuffer_blit
82	#define need_GL_EXT_gpu_program_parameters
83	#define need_GL_EXT_paletted_texture
84	#define need_GL_IBM_multimode_draw_arrays
85	#define need_GL_MESA_resize_buffers
86	#define need_GL_NV_vertex_program
87	#define need_GL_NV_fragment_program
88
89	#include "extension_helper.h"
90
91	const struct dri_extension card_extensions[] =
92	{
93	{ "GL_VERSION_1_3", GL_VERSION_1_3_functions },
94	{ "GL_VERSION_1_4", GL_VERSION_1_4_functions },
95	{ "GL_VERSION_1_5", GL_VERSION_1_5_functions },
96	{ "GL_VERSION_2_0", GL_VERSION_2_0_functions },
97	{ "GL_VERSION_2_1", GL_VERSION_2_1_functions },
98
99	{ "GL_EXT_blend_color", GL_EXT_blend_color_functions },
100	{ "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions },
101	{ "GL_EXT_convolution", GL_EXT_convolution_functions },
102	{ "GL_EXT_histogram", GL_EXT_histogram_functions },
103	{ "GL_SGI_color_table", GL_SGI_color_table_functions },
104
105	{ "GL_ARB_shader_objects", GL_ARB_shader_objects_functions },
106	{ "GL_ARB_vertex_program", GL_ARB_vertex_program_functions },
107	{ "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions },
108	{ "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions },
109	{ "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions },
110	{ "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions },
111	{ "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions },
112	{ "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
113	{ "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions },
114	{ "GL_IBM_multimode_draw_arrays", GL_IBM_multimode_draw_arrays_functions },
115	{ "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions },
116	{ "GL_NV_vertex_program", GL_NV_vertex_program_functions },
117	{ "GL_NV_fragment_program", GL_NV_fragment_program_functions },
118	{ NULL, NULL }
119	};
120
121	void fbSetSpanFunctions(driRenderbuffer drb, const GLvisual vis);
122
123	typedef struct {
124	GLcontext glCtx; / Mesa context */
125
126	struct {
127	__DRIcontextPrivate *context;
128	__DRIscreenPrivate *screen;
129	__DRIdrawablePrivate drawable; / drawable bound to this ctx */
130	} dri;
131
132	} fbContext, *fbContextPtr;
133
134	#define FB_CONTEXT(ctx) ((fbContextPtr)(ctx->DriverCtx))
135
136
137	static const GLubyte *
138	get_string(GLcontext *ctx, GLenum pname)
139	{
140	(void) ctx;
141	switch (pname) {
142	case GL_RENDERER:
143	return (const GLubyte *) "Mesa dumb framebuffer";
144	default:
145	return NULL;
146	}
147	}
148
149
150	static void
151	update_state( GLcontext *ctx, GLuint new_state )
152	{
153	/* not much to do here - pass it on */
154	_swrast_InvalidateState( ctx, new_state );
155	_swsetup_InvalidateState( ctx, new_state );
156	_vbo_InvalidateState( ctx, new_state );
157	_tnl_InvalidateState( ctx, new_state );
158	}
159
160
161	/**
162	* Called by ctx->Driver.GetBufferSize from in core Mesa to query the
163	* current framebuffer size.
164	*/
165	static void
166	get_buffer_size( GLframebuffer buffer, GLuint width, GLuint *height )
167	{
168	GET_CURRENT_CONTEXT(ctx);
169	fbContextPtr fbmesa = FB_CONTEXT(ctx);
170
171	*width = fbmesa->dri.drawable->w;
172	*height = fbmesa->dri.drawable->h;
173	}
174
175
176	static void
177	updateFramebufferSize(GLcontext *ctx)
178	{
179	fbContextPtr fbmesa = FB_CONTEXT(ctx);
180	struct gl_framebuffer *fb = ctx->WinSysDrawBuffer;
181	if (fbmesa->dri.drawable->w != fb->Width \|\|
182	fbmesa->dri.drawable->h != fb->Height) {
183	driUpdateFramebufferSize(ctx, fbmesa->dri.drawable);
184	}
185	}
186
187	static void
188	viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
189	{
190	/* XXX this should be called after we acquire the DRI lock, not here */
191	updateFramebufferSize(ctx);
192	}
193
194
195	static void
196	init_core_functions( struct dd_function_table *functions )
197	{
198	functions->GetString = get_string;
199	functions->UpdateState = update_state;
200	functions->GetBufferSize = get_buffer_size;
201	functions->Viewport = viewport;
202
203	functions->Clear = _swrast_Clear; /* could accelerate with blits */
204	}
205
206
207	/*
208	* Generate code for span functions.
209	*/
210
211	/* 24-bit BGR */
212	#define NAME(PREFIX) PREFIX##_B8G8R8
213	#define RB_TYPE GLubyte
214	#define SPAN_VARS \
215	driRenderbuffer drb = (driRenderbuffer ) rb;
216	#define INIT_PIXEL_PTR(P, X, Y) \
217	GLubyte P = (GLubyte )drb->Base.Data + (drb->Base.Height - (Y)) * drb->pitch + (X) * 3;
218	#define INC_PIXEL_PTR(P) P += 3
219	#define STORE_PIXEL(DST, X, Y, VALUE) \
220	DST[0] = VALUE[BCOMP]; \
221	DST[1] = VALUE[GCOMP]; \
222	DST[2] = VALUE[RCOMP]
223	#define FETCH_PIXEL(DST, SRC) \
224	DST[RCOMP] = SRC[2]; \
225	DST[GCOMP] = SRC[1]; \
226	DST[BCOMP] = SRC[0]; \
227	DST[ACOMP] = 0xff
228
229	#include "swrast/s_spantemp.h"
230
231
232	/* 32-bit BGRA */
233	#define NAME(PREFIX) PREFIX##_B8G8R8A8
234	#define RB_TYPE GLubyte
235	#define SPAN_VARS \
236	driRenderbuffer drb = (driRenderbuffer ) rb;
237	#define INIT_PIXEL_PTR(P, X, Y) \
238	GLubyte P = (GLubyte )drb->Base.Data + (drb->Base.Height - (Y)) * drb->pitch + (X) * 4;
239	#define INC_PIXEL_PTR(P) P += 4
240	#define STORE_PIXEL(DST, X, Y, VALUE) \
241	DST[0] = VALUE[BCOMP]; \
242	DST[1] = VALUE[GCOMP]; \
243	DST[2] = VALUE[RCOMP]; \
244	DST[3] = VALUE[ACOMP]
245	#define STORE_PIXEL_RGB(DST, X, Y, VALUE) \
246	DST[0] = VALUE[BCOMP]; \
247	DST[1] = VALUE[GCOMP]; \
248	DST[2] = VALUE[RCOMP]; \
249	DST[3] = 0xff
250	#define FETCH_PIXEL(DST, SRC) \
251	DST[RCOMP] = SRC[2]; \
252	DST[GCOMP] = SRC[1]; \
253	DST[BCOMP] = SRC[0]; \
254	DST[ACOMP] = SRC[3]
255
256	#include "swrast/s_spantemp.h"
257
258
259	/* 16-bit BGR (XXX implement dithering someday) */
260	#define NAME(PREFIX) PREFIX##_B5G6R5
261	#define RB_TYPE GLubyte
262	#define SPAN_VARS \
263	driRenderbuffer drb = (driRenderbuffer ) rb;
264	#define INIT_PIXEL_PTR(P, X, Y) \
265	GLushort P = (GLushort )drb->Base.Data + (drb->Base.Height - (Y)) * drb->pitch + (X) * 2;
266	#define INC_PIXEL_PTR(P) P += 1
267	#define STORE_PIXEL(DST, X, Y, VALUE) \
268	DST[0] = ( (((VALUE[RCOMP]) & 0xf8) << 8) \| (((VALUE[GCOMP]) & 0xfc) << 3) \| ((VALUE[BCOMP]) >> 3) )
269	#define FETCH_PIXEL(DST, SRC) \
270	DST[RCOMP] = ( (((SRC[0]) >> 8) & 0xf8) \| (((SRC[0]) >> 11) & 0x7) ); \
271	DST[GCOMP] = ( (((SRC[0]) >> 3) & 0xfc) \| (((SRC[0]) >> 5) & 0x3) ); \
272	DST[BCOMP] = ( (((SRC[0]) << 3) & 0xf8) \| (((SRC[0]) ) & 0x7) ); \
273	DST[ACOMP] = 0xff
274
275	#include "swrast/s_spantemp.h"
276
277
278	/* 15-bit BGR (XXX implement dithering someday) */
279	#define NAME(PREFIX) PREFIX##_B5G5R5
280	#define RB_TYPE GLubyte
281	#define SPAN_VARS \
282	driRenderbuffer drb = (driRenderbuffer ) rb;
283	#define INIT_PIXEL_PTR(P, X, Y) \
284	GLushort P = (GLushort )drb->Base.Data + (drb->Base.Height - (Y)) * drb->pitch + (X) * 2;
285	#define INC_PIXEL_PTR(P) P += 1
286	#define STORE_PIXEL(DST, X, Y, VALUE) \
287	DST[0] = ( (((VALUE[RCOMP]) & 0xf8) << 7) \| (((VALUE[GCOMP]) & 0xf8) << 2) \| ((VALUE[BCOMP]) >> 3) )
288	#define FETCH_PIXEL(DST, SRC) \
289	DST[RCOMP] = ( (((SRC[0]) >> 7) & 0xf8) \| (((SRC[0]) >> 10) & 0x7) ); \
290	DST[GCOMP] = ( (((SRC[0]) >> 2) & 0xf8) \| (((SRC[0]) >> 5) & 0x7) ); \
291	DST[BCOMP] = ( (((SRC[0]) << 3) & 0xf8) \| (((SRC[0]) ) & 0x7) ); \
292	DST[ACOMP] = 0xff
293
294	#include "swrast/s_spantemp.h"
295
296
297	/* 8-bit color index */
298	#define NAME(PREFIX) PREFIX##_CI8
299	#define CI_MODE
300	#define RB_TYPE GLubyte
301	#define SPAN_VARS \
302	driRenderbuffer drb = (driRenderbuffer ) rb;
303	#define INIT_PIXEL_PTR(P, X, Y) \
304	GLubyte P = (GLubyte )drb->Base.Data + (drb->Base.Height - (Y)) * drb->pitch + (X);
305	#define INC_PIXEL_PTR(P) P += 1
306	#define STORE_PIXEL(DST, X, Y, VALUE) \
307	*DST = VALUE[0]
308	#define FETCH_PIXEL(DST, SRC) \
309	DST = SRC[0]
310
311	#include "swrast/s_spantemp.h"
312
313
314
315	void
316	fbSetSpanFunctions(driRenderbuffer drb, const GLvisual vis)
317	{
318	ASSERT(drb->Base.InternalFormat == GL_RGBA);
319	if (drb->Base.InternalFormat == GL_RGBA) {
320	if (vis->redBits == 5 && vis->greenBits == 6 && vis->blueBits == 5) {
321	drb->Base.GetRow = get_row_B5G6R5;
322	drb->Base.GetValues = get_values_B5G6R5;
323	drb->Base.PutRow = put_row_B5G6R5;
324	drb->Base.PutMonoRow = put_mono_row_B5G6R5;
325	drb->Base.PutRowRGB = put_row_rgb_B5G6R5;
326	drb->Base.PutValues = put_values_B5G6R5;
327	drb->Base.PutMonoValues = put_mono_values_B5G6R5;
328	}
329	else if (vis->redBits == 5 && vis->greenBits == 5 && vis->blueBits == 5) {
330	drb->Base.GetRow = get_row_B5G5R5;
331	drb->Base.GetValues = get_values_B5G5R5;
332	drb->Base.PutRow = put_row_B5G5R5;
333	drb->Base.PutMonoRow = put_mono_row_B5G5R5;
334	drb->Base.PutRowRGB = put_row_rgb_B5G5R5;
335	drb->Base.PutValues = put_values_B5G5R5;
336	drb->Base.PutMonoValues = put_mono_values_B5G5R5;
337	}
338	else if (vis->redBits == 8 && vis->greenBits == 8 && vis->blueBits == 8
339	&& vis->alphaBits == 8) {
340	drb->Base.GetRow = get_row_B8G8R8A8;
341	drb->Base.GetValues = get_values_B8G8R8A8;
342	drb->Base.PutRow = put_row_B8G8R8A8;
343	drb->Base.PutMonoRow = put_mono_row_B8G8R8A8;
344	drb->Base.PutRowRGB = put_row_rgb_B8G8R8A8;
345	drb->Base.PutValues = put_values_B8G8R8A8;
346	drb->Base.PutMonoValues = put_mono_values_B8G8R8A8;
347	}
348	else if (vis->redBits == 8 && vis->greenBits == 8 && vis->blueBits == 8
349	&& vis->alphaBits == 0) {
350	drb->Base.GetRow = get_row_B8G8R8;
351	drb->Base.GetValues = get_values_B8G8R8;
352	drb->Base.PutRow = put_row_B8G8R8;
353	drb->Base.PutMonoRow = put_mono_row_B8G8R8;
354	drb->Base.PutRowRGB = put_row_rgb_B8G8R8;
355	drb->Base.PutValues = put_values_B8G8R8;
356	drb->Base.PutMonoValues = put_mono_values_B8G8R8;
357	}
358	else if (vis->indexBits == 8) {
359	drb->Base.GetRow = get_row_CI8;
360	drb->Base.GetValues = get_values_CI8;
361	drb->Base.PutRow = put_row_CI8;
362	drb->Base.PutMonoRow = put_mono_row_CI8;
363	drb->Base.PutValues = put_values_CI8;
364	drb->Base.PutMonoValues = put_mono_values_CI8;
365	}
366	}
367	else {
368	/* hardware z/stencil/etc someday */
369	}
370	}
371
372
373	static void
374	fbDestroyScreen( __DRIscreenPrivate *sPriv )
375	{
376	}
377
378
379	static const __DRIconfig **fbFillInModes(unsigned pixel_bits,
380	unsigned depth_bits,
381	unsigned stencil_bits,
382	GLboolean have_back_buffer)
383	{
384	unsigned deep = (depth_bits > 17);
385
386	/* Right now GLX_SWAP_COPY_OML isn't supported, but it would be easy
387	* enough to add support. Basically, if a context is created with an
388	* fbconfig where the swap method is GLX_SWAP_COPY_OML, pageflipping
389	* will never be used.
390	*/
391
392	static const GLenum db_modes[2] = { GLX_NONE, GLX_SWAP_UNDEFINED_OML };
393	uint8_t depth_bits_array[4];
394	uint8_t stencil_bits_array[4];
395	if(deep) {
396	depth_bits_array[0] = 0;
397	depth_bits_array[1] = 24;
398	stencil_bits_array[0] = 0;
399	stencil_bits_array[1] = 8;
400	} else {
401	depth_bits_array[0] = depth_bits;
402	depth_bits_array[1] = 0;
403	depth_bits_array[2] = depth_bits;
404	depth_bits_array[3] = 0;
405	stencil_bits_array[0] = 0;
406	stencil_bits_array[1] = 0;
407	stencil_bits_array[2] = 8;
408	stencil_bits_array[3] = 8;
409	}
410
411	return driCreateConfigs(
412	deep ? GL_RGBA : GL_RGB,
413	deep ? GL_UNSIGNED_INT_8_8_8_8 : GL_UNSIGNED_SHORT_5_6_5,
414	depth_bits_array,
415	stencil_bits_array,
416	deep ? 2 : 4,
417	db_modes, 2);
418	}
419
420	/**
421	* This is the driver specific part of the createNewScreen entry point.
422	* Called when using legacy DRI.
423	*
424	* return the __GLcontextModes supported by this driver
425	*/
426	static const __DRIconfig *fbInitScreen(__DRIscreenPrivate psp)
427	{
428	static const __DRIversion ddx_expected = { 1, 0, 0 };
429	static const __DRIversion dri_expected = { 4, 0, 0 };
430	static const __DRIversion drm_expected = { 1, 0, 0 };
431
432
433	if ( ! driCheckDriDdxDrmVersions2( "vboxvideo",
434	& psp->dri_version, & dri_expected,
435	& psp->ddx_version, & ddx_expected,
436	& psp->drm_version, & drm_expected ) ) {
437	return NULL;
438	}
439
440	driInitExtensions( NULL, card_extensions, GL_FALSE );
441
442	return fbFillInModes( psp->fbBPP,
443	(psp->fbBPP == 16) ? 16 : 24,
444	(psp->fbBPP == 16) ? 0 : 8,
445	1);
446	}
447
448	/* Create the device specific context.
449	*/
450	static GLboolean
451	fbCreateContext( const __GLcontextModes *glVisual,
452	__DRIcontextPrivate *driContextPriv,
453	void *sharedContextPrivate)
454	{
455	fbContextPtr fbmesa;
456	GLcontext ctx, shareCtx;
457	struct dd_function_table functions;
458
459	assert(glVisual);
460	assert(driContextPriv);
461
462	/* Allocate the Fb context */
463	fbmesa = (fbContextPtr) _mesa_calloc( sizeof(*fbmesa) );
464	if ( !fbmesa )
465	return GL_FALSE;
466
467	/* Init default driver functions then plug in our FBdev-specific functions
468	*/
469	_mesa_init_driver_functions(&functions);
470	init_core_functions(&functions);
471
472	/* Allocate the Mesa context */
473	if (sharedContextPrivate)
474	shareCtx = ((fbContextPtr) sharedContextPrivate)->glCtx;
475	else
476	shareCtx = NULL;
477
478	ctx = fbmesa->glCtx = _mesa_create_context(glVisual, shareCtx,
479	&functions, (void *) fbmesa);
480	if (!fbmesa->glCtx) {
481	_mesa_free(fbmesa);
482	return GL_FALSE;
483	}
484	driContextPriv->driverPrivate = fbmesa;
485
486	/* Create module contexts */
487	_swrast_CreateContext( ctx );
488	_vbo_CreateContext( ctx );
489	_tnl_CreateContext( ctx );
490	_swsetup_CreateContext( ctx );
491	_swsetup_Wakeup( ctx );
492
493
494	/* use default TCL pipeline */
495	{
496	TNLcontext *tnl = TNL_CONTEXT(ctx);
497	tnl->Driver.RunPipeline = _tnl_run_pipeline;
498	}
499
500	_mesa_enable_sw_extensions(ctx);
501
502	return GL_TRUE;
503	}
504
505
506	static void
507	fbDestroyContext( __DRIcontextPrivate *driContextPriv )
508	{
509	GET_CURRENT_CONTEXT(ctx);
510	fbContextPtr fbmesa = (fbContextPtr) driContextPriv->driverPrivate;
511	fbContextPtr current = ctx ? FB_CONTEXT(ctx) : NULL;
512
513	/* check if we're deleting the currently bound context */
514	if (fbmesa == current) {
515	_mesa_make_current(NULL, NULL, NULL);
516	}
517
518	/* Free fb context resources */
519	if ( fbmesa ) {
520	_swsetup_DestroyContext( fbmesa->glCtx );
521	_tnl_DestroyContext( fbmesa->glCtx );
522	_vbo_DestroyContext( fbmesa->glCtx );
523	_swrast_DestroyContext( fbmesa->glCtx );
524
525	/* free the Mesa context */
526	fbmesa->glCtx->DriverCtx = NULL;
527	_mesa_destroy_context( fbmesa->glCtx );
528
529	_mesa_free( fbmesa );
530	}
531	}
532
533
534	/* Create and initialize the Mesa and driver specific pixmap buffer
535	* data.
536	*/
537	static GLboolean
538	fbCreateBuffer( __DRIscreenPrivate *driScrnPriv,
539	__DRIdrawablePrivate *driDrawPriv,
540	const __GLcontextModes *mesaVis,
541	GLboolean isPixmap )
542	{
543	struct gl_framebuffer *mesa_framebuffer;
544
545	if (isPixmap) {
546	return GL_FALSE; /* not implemented */
547	}
548	else {
549	const GLboolean swDepth = mesaVis->depthBits > 0;
550	const GLboolean swAlpha = mesaVis->alphaBits > 0;
551	const GLboolean swAccum = mesaVis->accumRedBits > 0;
552	const GLboolean swStencil = mesaVis->stencilBits > 0;
553
554	mesa_framebuffer = _mesa_create_framebuffer(mesaVis);
555	if (!mesa_framebuffer)
556	return 0;
557
558	/* XXX double-check these parameters (bpp vs cpp, etc) */
559	{
560	driRenderbuffer *drb = driNewRenderbuffer(GL_RGBA,
561	driScrnPriv->pFB,
562	driScrnPriv->fbBPP / 8,
563	driScrnPriv->fbOrigin,
564	driScrnPriv->fbStride,
565	driDrawPriv);
566	fbSetSpanFunctions(drb, mesaVis);
567	_mesa_add_renderbuffer(mesa_framebuffer,
568	BUFFER_FRONT_LEFT, &drb->Base);
569	}
570	if (mesaVis->doubleBufferMode) {
571	/* XXX what are the correct origin/stride values? */
572	GLvoid *backBuf = _mesa_malloc(driScrnPriv->fbStride
573	* driScrnPriv->fbHeight);
574	driRenderbuffer *drb = driNewRenderbuffer(GL_RGBA,
575	backBuf,
576	driScrnPriv->fbBPP /8,
577	driScrnPriv->fbOrigin,
578	driScrnPriv->fbStride,
579	driDrawPriv);
580	fbSetSpanFunctions(drb, mesaVis);
581	_mesa_add_renderbuffer(mesa_framebuffer,
582	BUFFER_BACK_LEFT, &drb->Base);
583	}
584
585	_mesa_add_soft_renderbuffers(mesa_framebuffer,
586	GL_FALSE, /* color */
587	swDepth,
588	swStencil,
589	swAccum,
590	swAlpha, /* or always zero? */
591	GL_FALSE /* aux */);
592
593	driDrawPriv->driverPrivate = mesa_framebuffer;
594
595	return 1;
596	}
597	}
598
599
600	static void
601	fbDestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
602	{
603	_mesa_unreference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)));
604	}
605
606
607
608	/* If the backbuffer is on a videocard, this is extraordinarily slow!
609	*/
610	static void
611	fbSwapBuffers( __DRIdrawablePrivate *dPriv )
612	{
613	struct gl_framebuffer mesa_framebuffer = (struct gl_framebuffer )dPriv->driverPrivate;
614	struct gl_renderbuffer * front_renderbuffer = mesa_framebuffer->Attachment[BUFFER_FRONT_LEFT].Renderbuffer;
615	void *frontBuffer = front_renderbuffer->Data;
616	int currentPitch = ((driRenderbuffer *)front_renderbuffer)->pitch;
617	void *backBuffer = mesa_framebuffer->Attachment[BUFFER_BACK_LEFT].Renderbuffer->Data;
618
619	if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
620	fbContextPtr fbmesa = (fbContextPtr) dPriv->driContextPriv->driverPrivate;
621	GLcontext *ctx = fbmesa->glCtx;
622
623	if (ctx->Visual.doubleBufferMode) {
624	int i;
625	int offset = 0;
626	char *tmp = _mesa_malloc(currentPitch);
627
628	_mesa_notifySwapBuffers( ctx ); /* flush pending rendering commands */
629
630	ASSERT(frontBuffer);
631	ASSERT(backBuffer);
632
633	for (i = 0; i < dPriv->h; i++) {
634	_mesa_memcpy(tmp, (char *) backBuffer + offset,
635	currentPitch);
636	_mesa_memcpy((char *) frontBuffer + offset, tmp,
637	currentPitch);
638	offset += currentPitch;
639	}
640
641	_mesa_free(tmp);
642	}
643	}
644	else {
645	/* XXX this shouldn't be an error but we can't handle it for now */
646	_mesa_problem(NULL, "fbSwapBuffers: drawable has no context!\n");
647	}
648	}
649
650
651	/* Force the context `c' to be the current context and associate with it
652	* buffer `b'.
653	*/
654	static GLboolean
655	fbMakeCurrent( __DRIcontextPrivate *driContextPriv,
656	__DRIdrawablePrivate *driDrawPriv,
657	__DRIdrawablePrivate *driReadPriv )
658	{
659	if ( driContextPriv ) {
660	fbContextPtr newFbCtx =
661	(fbContextPtr) driContextPriv->driverPrivate;
662
663	newFbCtx->dri.drawable = driDrawPriv;
664
665	_mesa_make_current( newFbCtx->glCtx,
666	driDrawPriv->driverPrivate,
667	driReadPriv->driverPrivate);
668	} else {
669	_mesa_make_current( NULL, NULL, NULL );
670	}
671
672	return GL_TRUE;
673	}
674
675
676	/* Force the context `c' to be unbound from its buffer.
677	*/
678	static GLboolean
679	fbUnbindContext( __DRIcontextPrivate *driContextPriv )
680	{
681	return GL_TRUE;
682	}
683
684	const struct __DriverAPIRec driDriverAPI = {
685	.InitScreen = fbInitScreen,
686	.DestroyScreen = fbDestroyScreen,
687	.CreateContext = fbCreateContext,
688	.DestroyContext = fbDestroyContext,
689	.CreateBuffer = fbCreateBuffer,
690	.DestroyBuffer = fbDestroyBuffer,
691	.SwapBuffers = fbSwapBuffers,
692	.MakeCurrent = fbMakeCurrent,
693	.UnbindContext = fbUnbindContext,
694	};

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source: vbox/trunk/src/VBox/Additions/common/crOpenGL/vboxdri_drv.c@ 34418

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