DevVGA-SVGA3d-glHlp.cpp@ 93445

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1	/* $Id: DevVGA-SVGA3d-glHlp.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* DevVMWare - VMWare SVGA device OpenGL backend
4	*/
5
6	/*
7	* Copyright (C) 2013-2022 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#ifdef DEBUG_bird
23	//# define RTMEM_WRAP_TO_EF_APIS
24	#endif
25	#define LOG_GROUP LOG_GROUP_DEV_VMSVGA
26	#include <VBox/vmm/pdmdev.h>
27
28	#include <iprt/assert.h>
29	#include <iprt/mem.h>
30
31	#include "DevVGA-SVGA.h"
32	#include "DevVGA-SVGA3d-internal.h"
33
34	/* Parameters for glVertexAttribPointer. */
35	typedef struct VertexAttribDesc
36	{
37	GLint size;
38	GLenum type;
39	GLboolean normalized;
40	GLsizei stride;
41	GLsizei offset;
42	} VertexAttribDesc;
43
44	/* Information about a shader program. */
45	typedef struct ShaderProgram
46	{
47	GLuint vertexShader; /* Vertex shader name. */
48	GLuint fragmentShader; /* Fragment shader name. */
49	GLuint program; /* Shader program name. */
50	GLint sSourceTex; /* Location of the texture sampler uniform in the shader. */
51	GLint uTexInfo; /* Location of the texture information uniform in the shader. */
52	} ShaderProgram;
53
54	/* Texture format conversion data.
55	* Uses a fragment (pixel) shader to render a source texture in one format
56	* to the target texture in another format.
57	*/
58	typedef struct VMSVGA3DFORMATCONVERTER
59	{
60	PVMSVGA3DSTATE pState;
61
62	ShaderProgram programYUY2ToRGB; /* From the YUY2 emulated format to the actual RGB texture. */
63	ShaderProgram programYUY2FromRGB; /* From the actual RGB texture to the emulated YUY2 format. */
64	ShaderProgram programUYVYToRGB; /* From the UYVY emulated format to the actual RGB texture. */
65	ShaderProgram programUYVYFromRGB; /* From the actual RGB texture to the emulated UYVY format. */
66
67	GLuint framebuffer; /* Framebuffer object name. */
68
69	GLuint vertexBuffer; /* Vertex attribute buffer. Position + texcoord. */
70	} VMSVGA3DFORMATCONVERTER;
71
72	/* Parameters for glVertexAttribPointer. */
73	static const VertexAttribDesc aVertexAttribs[] =
74	{
75	{2, GL_FLOAT, GL_FALSE, 16, 0 }, /* Position. */
76	{2, GL_FLOAT, GL_FALSE, 16, 8 } /* Texcoord. */
77	};
78
79	/* Triangle fan */
80	static float const aAttribData[] =
81	{
82	/* positions texcoords */
83	-1.0f, -1.0f, 0.0f, 0.0f,
84	1.0f, -1.0f, 1.0f, 0.0f,
85	1.0f, 1.0f, 1.0f, 1.0f,
86	-1.0f, 1.0f, 0.0f, 1.0f
87	};
88
89	static const GLchar shaderHeaderSource[] =
90	{
91	" #version 120\n"
92	};
93
94	static const GLchar vertexShaderSource[] =
95	{
96	" attribute vec2 attrib0;\n"
97	" attribute vec2 attrib1;\n"
98	" void main(void)\n"
99	" {\n"
100	" gl_TexCoord[0].xy = attrib1;\n"
101	" gl_Position = vec4(attrib0.x, attrib0.y, 0.0f, 1.0f);\n"
102	" }\n"
103	};
104
105	static const GLchar fetchYUY2Source[] =
106	{
107	" vec4 fetchYUV(vec4 texColor)\n"
108	" {\n"
109	" return vec4(texColor.b, texColor.g, texColor.r, texColor.a);\n"
110	" }\n"
111	};
112
113	static const GLchar fetchUYVYSource[] =
114	{
115	" vec4 fetchYUV(vec4 texColor)\n"
116	" {\n"
117	" return vec4(texColor.g, texColor.b, texColor.a, texColor.r);\n"
118	" }\n"
119	};
120
121	static const GLchar YUV2RGBShaderSource[] =
122	{
123	" uniform sampler2D sSourceTex;\n"
124	" uniform vec4 uTexInfo;\n"
125	" \n"
126	" const mat3 yuvCoeffs = mat3\n"
127	" (\n"
128	" 1.164383f, 0.0f, 1.596027f, // first column \n"
129	" 1.164383f, -0.391762f, -0.812968f, // second column\n"
130	" 1.164383f, 2.017232f, 0.0f // third column\n"
131	" );\n"
132	" \n"
133	" void main() {\n"
134	" // Input texcoords are in [0;1] range for the target.\n"
135	" vec2 texCoord = gl_TexCoord[0].xy;\n"
136	" // Convert to the target coords in pixels: xPixel = texCoord.x * TextureWidth. \n"
137	" float xTargetPixel = texCoord.x * uTexInfo.x;\n"
138	" // Source texture is half width, i.e. it contains data in pixels [0; width / 2 - 1].\n"
139	" float xSourcePixel = xTargetPixel / 2.0f;\n"
140	" // Remainder is about 0.25 for even pixels and about 0.75 for odd pixels.\n"
141	" float remainder = fract(xSourcePixel);\n"
142	" // Back to the normalized coords: texCoord.x = xPixel / Width.\n"
143	" texCoord.x = xSourcePixel * uTexInfo.z;\n"
144	" vec4 texColor = texture2D(sSourceTex, texCoord);\n"
145	" vec4 y0uy1v = fetchYUV(texColor);\n"
146	" // Get y0 for even x coordinates and y1 for odd ones.\n"
147	" float y = remainder < 0.5f ? y0uy1v.x : y0uy1v.z;\n"
148	" // Make a vector for easier calculation.\n"
149	" vec3 yuv = vec3(y, y0uy1v.y, y0uy1v.w);\n"
150	" yuv -= vec3(0.0627f, 0.502f, 0.502f);\n"
151	" vec3 bgr = yuv * yuvCoeffs;\n"
152	" //vec3 bgr;\n"
153	" //bgr.r = 1.164383 * yuv.x + 1.596027 * yuv.z;\n"
154	" //bgr.g = 1.164383 * yuv.x - 0.391762 * yuv.y - 0.812968 * yuv.z;\n"
155	" //bgr.b = 1.164383 * yuv.x + 2.017232 * yuv.y;\n"
156	" bgr = clamp(bgr, 0.0f, 1.0f);\n"
157	" gl_FragData[0] = vec4(bgr, 1.0f);\n"
158	" }\n"
159	};
160
161	static const GLchar storeYUY2Source[] =
162	{
163	" vec4 storeYUV(float y0, float u, float y1, float v)\n"
164	" {\n"
165	" return vec4(y1, u, y0, v);\n"
166	" }\n"
167	};
168
169	static const GLchar storeUYVYSource[] =
170	{
171	" vec4 storeYUV(float y0, float u, float y1, float v)\n"
172	" {\n"
173	" return vec4(u, y1, v, y0);\n"
174	" }\n"
175	};
176
177	static const GLchar RGB2YUVShaderSource[] =
178	{
179	" uniform sampler2D sSourceTex;\n"
180	" uniform vec4 uTexInfo;\n"
181	" \n"
182	" const mat3 bgrCoeffs = mat3\n"
183	" (\n"
184	" 0.2578f, 0.5039f, 0.0977f, // first column \n"
185	" -0.1484f, -0.2891f, 0.4375f, // second column\n"
186	" 0.4375f, -0.3672f, -0.0703f // third column\n"
187	" );\n"
188	" const vec3 yuvShift = vec3(0.0647f, 0.5039f, 0.5039f);\n"
189	" \n"
190	" void main() {\n"
191	" // Input texcoords are in [0;1] range for the target.\n"
192	" vec2 texCoordDst = gl_TexCoord[0].xy;\n"
193	" // Convert to the target coords in pixels: xPixel = TexCoord.x * TextureWidth.\n"
194	" float xTargetPixel = texCoordDst.x * uTexInfo.x;\n"
195	" vec4 bgraOutputPixel;\n"
196	" if (xTargetPixel < uTexInfo.x / 2.0f)\n"
197	" {\n"
198	" // Target texture is half width, i.e. it contains data in pixels [0; width / 2 - 1].\n"
199	" // Compute the source texture coords for the pixels which will be used to compute the target pixel.\n"
200	" vec2 texCoordSrc = texCoordDst;\n"
201	" texCoordSrc.x *= 2.0f;\n"
202	" // Even pixel. Fetch two BGRA source pixels.\n"
203	" vec4 texColor0 = texture2D(sSourceTex, texCoordSrc);\n"
204	" // Advance one pixel (+ 1/Width)\n"
205	" texCoordSrc.x += uTexInfo.z;\n"
206	" vec4 texColor1 = texture2D(sSourceTex, texCoordSrc);\n"
207	" vec3 yuv0 = texColor0.rgb * bgrCoeffs;\n"
208	" yuv0 += yuvShift;\n"
209	" vec3 yuv1 = texColor1.rgb * bgrCoeffs;\n"
210	" yuv1 += yuvShift;\n"
211	" float y0 = yuv0.r;\n"
212	" float u = (yuv0.g + yuv1.g) / 2.0f;\n"
213	" float y1 = yuv1.r;\n"
214	" float v = (yuv0.b + yuv1.b) / 2.0f;\n"
215	" bgraOutputPixel = storeYUV(y0, u, y1, v);\n"
216	" }\n"
217	" else\n"
218	" {\n"
219	" // [width / 2; width - 1] pixels are not used. Set to something.\n"
220	" bgraOutputPixel = vec4(0.0f, 0.0f, 0.0f, 0.0f);\n"
221	" }\n"
222	" bgraOutputPixel = clamp(bgraOutputPixel, 0.0f, 1.0f);\n"
223	" gl_FragData[0] = bgraOutputPixel;\n"
224	" }\n"
225	};
226
227	#define GL_CHECK_ERROR() do { \
228	VMSVGA3D_CHECK_LAST_ERROR_WARN(pState, pContext); \
229	if (pContext->lastError != GL_NO_ERROR) \
230	LogRelMax(10, ("VMSVGA: %s (%d): GL error 0x%x\n", __FUNCTION__, __LINE__, pContext->lastError)); \
231	} while (0)
232
233	/* Compile shaders and link a shader program. */
234	static void createShaderProgram(PVMSVGA3DSTATE pState,
235	ShaderProgram *pProgram,
236	int cVertexSources, const GLchar **apszVertexSources,
237	int cFragmentSources, const GLchar **apszFragmentSources)
238	{
239	AssertReturnVoid(pState->idActiveContext == VMSVGA3D_SHARED_CTX_ID);
240
241	/* Everything is done on the shared context. The pState and pContext are for GL_CHECK_ERROR macro. */
242	PVMSVGA3DCONTEXT pContext = &pState->SharedCtx;
243
244	int success;
245	char szInfoLog[1024];
246
247	/*
248	* VERTEX shader.
249	*/
250	pProgram->vertexShader = pState->ext.glCreateShader(GL_VERTEX_SHADER);
251	GL_CHECK_ERROR();
252
253	pState->ext.glShaderSource(pProgram->vertexShader, cVertexSources, apszVertexSources, NULL);
254	GL_CHECK_ERROR();
255
256	pState->ext.glCompileShader(pProgram->vertexShader);
257	GL_CHECK_ERROR();
258
259	pState->ext.glGetShaderiv(pProgram->vertexShader, GL_COMPILE_STATUS, &success);
260	GL_CHECK_ERROR();
261	if (!success)
262	{
263	pState->ext.glGetShaderInfoLog(pProgram->vertexShader, sizeof(szInfoLog), NULL, szInfoLog);
264	GL_CHECK_ERROR();
265	LogRelMax(10, ("VMSVGA: Vertex shader compilation error:\n%s\n", szInfoLog));
266	};
267
268	/*
269	* FRAGMENT shader.
270	*/
271	pProgram->fragmentShader = pState->ext.glCreateShader(GL_FRAGMENT_SHADER);
272	GL_CHECK_ERROR();
273
274	pState->ext.glShaderSource(pProgram->fragmentShader, cFragmentSources, apszFragmentSources, NULL);
275	GL_CHECK_ERROR();
276
277	pState->ext.glCompileShader(pProgram->fragmentShader);
278	GL_CHECK_ERROR();
279
280	pState->ext.glGetShaderiv(pProgram->fragmentShader, GL_COMPILE_STATUS, &success);
281	GL_CHECK_ERROR();
282	if (!success)
283	{
284	pState->ext.glGetShaderInfoLog(pProgram->fragmentShader, sizeof(szInfoLog), NULL, szInfoLog);
285	GL_CHECK_ERROR();
286	LogRelMax(10, ("VMSVGA: Fragment shader compilation error:\n%s\n", szInfoLog));
287	};
288
289	/*
290	* Program
291	*/
292	pProgram->program = pState->ext.glCreateProgram();
293	GL_CHECK_ERROR();
294
295	pState->ext.glAttachShader(pProgram->program, pProgram->vertexShader);
296	GL_CHECK_ERROR();
297
298	pState->ext.glAttachShader(pProgram->program, pProgram->fragmentShader);
299	GL_CHECK_ERROR();
300
301	pState->ext.glLinkProgram(pProgram->program);
302	GL_CHECK_ERROR();
303
304	pState->ext.glGetProgramiv(pProgram->program, GL_LINK_STATUS, &success);
305	if(!success)
306	{
307	pState->ext.glGetProgramInfoLog(pProgram->program, sizeof(szInfoLog), NULL, szInfoLog);
308	GL_CHECK_ERROR();
309	LogRelMax(10, ("VMSVGA: Shader program link error:\n%s\n", szInfoLog));
310	}
311
312	pProgram->sSourceTex = pState->ext.glGetUniformLocation(pProgram->program, "sSourceTex");
313	GL_CHECK_ERROR();
314
315	pProgram->uTexInfo = pState->ext.glGetUniformLocation(pProgram->program, "uTexInfo");
316	GL_CHECK_ERROR();
317	}
318
319	/* Delete a shader program and associated shaders. */
320	static void deleteShaderProgram(PVMSVGA3DSTATE pState,
321	ShaderProgram *pProgram)
322	{
323	AssertReturnVoid(pState->idActiveContext == VMSVGA3D_SHARED_CTX_ID);
324
325	/* Everything is done on the shared context. The pState and pContext are for GL_CHECK_ERROR macro. */
326	PVMSVGA3DCONTEXT pContext = &pState->SharedCtx;
327
328	if (pProgram->program)
329	{
330	if (pProgram->vertexShader)
331	{
332	pState->ext.glDetachShader(pProgram->program, pProgram->vertexShader);
333	GL_CHECK_ERROR();
334
335	pState->ext.glDeleteShader(pProgram->vertexShader);
336	GL_CHECK_ERROR();
337	}
338
339	if (pProgram->fragmentShader)
340	{
341	pState->ext.glDetachShader(pProgram->program, pProgram->fragmentShader);
342	GL_CHECK_ERROR();
343
344	pState->ext.glDeleteShader(pProgram->fragmentShader);
345	GL_CHECK_ERROR();
346	}
347
348	pState->ext.glDeleteProgram(pProgram->program);
349	GL_CHECK_ERROR();
350	}
351
352	RT_ZERO(*pProgram);
353	}
354
355	/* Initialize the format conversion. Allocate and create necessary resources. */
356	static void formatConversionInit(PVMSVGA3DSTATE pState)
357	{
358	AssertReturnVoid(pState->idActiveContext == VMSVGA3D_SHARED_CTX_ID);
359
360	PVMSVGA3DFORMATCONVERTER pConv = pState->pConv;
361	AssertReturnVoid(pConv);
362
363	/* The pState and pContext variables are for GL_CHECK_ERROR macro. */
364	PVMSVGA3DCONTEXT pContext = &pState->SharedCtx;
365
366	pConv->pState = pState;
367
368	/*
369	* Shader programs.
370	*/
371	static const GLchar *apszVertexShaderSources[] =
372	{
373	shaderHeaderSource,
374	vertexShaderSource
375	};
376
377	static const GLchar * apszYUY2ToRGBSources[] =
378	{
379	shaderHeaderSource,
380	fetchYUY2Source,
381	YUV2RGBShaderSource
382	};
383
384	static const GLchar *apszUYVYToRGBSources[] =
385	{
386	shaderHeaderSource,
387	fetchUYVYSource,
388	YUV2RGBShaderSource
389	};
390
391	static const GLchar *apszYUY2FromRGBSources[] =
392	{
393	shaderHeaderSource,
394	storeYUY2Source,
395	RGB2YUVShaderSource
396	};
397
398	static const GLchar *apszUYVYFromRGBSources[] =
399	{
400	shaderHeaderSource,
401	storeUYVYSource,
402	RGB2YUVShaderSource
403	};
404
405	createShaderProgram(pState, &pConv->programYUY2ToRGB,
406	RT_ELEMENTS(apszVertexShaderSources), apszVertexShaderSources,
407	RT_ELEMENTS(apszYUY2ToRGBSources), apszYUY2ToRGBSources);
408
409	createShaderProgram(pState, &pConv->programUYVYToRGB,
410	RT_ELEMENTS(apszVertexShaderSources), apszVertexShaderSources,
411	RT_ELEMENTS(apszUYVYToRGBSources), apszUYVYToRGBSources);
412
413	createShaderProgram(pState, &pConv->programYUY2FromRGB,
414	RT_ELEMENTS(apszVertexShaderSources), apszVertexShaderSources,
415	RT_ELEMENTS(apszYUY2FromRGBSources), apszYUY2FromRGBSources);
416
417	createShaderProgram(pState, &pConv->programUYVYFromRGB,
418	RT_ELEMENTS(apszVertexShaderSources), apszVertexShaderSources,
419	RT_ELEMENTS(apszUYVYFromRGBSources), apszUYVYFromRGBSources);
420
421	/*
422	* Create a framebuffer object which is used for rendering to a texture.
423	*/
424	pState->ext.glGenFramebuffers(1, &pConv->framebuffer);
425	GL_CHECK_ERROR();
426
427	pState->ext.glBindFramebuffer(GL_DRAW_FRAMEBUFFER, pConv->framebuffer);
428	GL_CHECK_ERROR();
429
430	static GLenum aDrawBuffers[] = { GL_COLOR_ATTACHMENT0 };
431	pState->ext.glDrawBuffers(RT_ELEMENTS(aDrawBuffers), aDrawBuffers);
432	GL_CHECK_ERROR();
433
434	pState->ext.glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
435	GL_CHECK_ERROR();
436
437	/*
438	* Vertex attribute array.
439	*/
440	pState->ext.glGenBuffers(1, &pConv->vertexBuffer);
441	GL_CHECK_ERROR();
442
443	pState->ext.glBindBuffer(GL_ARRAY_BUFFER, pConv->vertexBuffer);
444	GL_CHECK_ERROR();
445
446	pState->ext.glBufferData(GL_ARRAY_BUFFER, sizeof(aAttribData), aAttribData, GL_STATIC_DRAW);
447	GL_CHECK_ERROR();
448
449	pState->ext.glBindBuffer(GL_ARRAY_BUFFER, 0);
450	GL_CHECK_ERROR();
451	}
452
453	/* Delete everything. */
454	static void formatConversionDestroy(PVMSVGA3DSTATE pState)
455	{
456	AssertReturnVoid(pState->idActiveContext == VMSVGA3D_SHARED_CTX_ID);
457
458	PVMSVGA3DFORMATCONVERTER pConv = pState->pConv;
459	AssertReturnVoid(pConv);
460
461	/* The pState and pContext variables are for GL_CHECK_ERROR macro. */
462	PVMSVGA3DCONTEXT pContext = &pState->SharedCtx;
463
464	if (pConv->framebuffer != 0)
465	{
466	/* The code keeps nothing attached. */
467	pState->ext.glBindFramebuffer(GL_DRAW_FRAMEBUFFER, pConv->framebuffer);
468	GL_CHECK_ERROR();
469
470	GLint texture = -1;
471	pState->ext.glGetFramebufferAttachmentParameteriv(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
472	GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &texture);
473	GL_CHECK_ERROR();
474	AssertMsg(texture == 0, ("texture %d\n", texture));
475
476	pState->ext.glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
477	GL_CHECK_ERROR();
478
479	pState->ext.glDeleteFramebuffers(1, &pConv->framebuffer);
480	GL_CHECK_ERROR();
481
482	pConv->framebuffer = 0;
483	}
484
485	deleteShaderProgram(pState, &pConv->programUYVYFromRGB);
486	deleteShaderProgram(pState, &pConv->programYUY2FromRGB);
487	deleteShaderProgram(pState, &pConv->programUYVYToRGB);
488	deleteShaderProgram(pState, &pConv->programYUY2ToRGB);
489
490	if (pConv->vertexBuffer)
491	{
492	pState->ext.glDeleteBuffers(1, &pConv->vertexBuffer);
493	GL_CHECK_ERROR();
494
495	pConv->vertexBuffer = 0;
496	}
497
498	pConv->pState = 0;
499	}
500
501	/* Make use of a shader program for the current context and initialize the program uniforms. */
502	static void setShaderProgram(PVMSVGA3DSTATE pState,
503	ShaderProgram *pProgram,
504	uint32_t cWidth,
505	uint32_t cHeight)
506	{
507	AssertReturnVoid(pState->idActiveContext == VMSVGA3D_SHARED_CTX_ID);
508
509	/* Everything is done on the shared context. The pState and pContext are for GL_CHECK_ERROR macro. */
510	PVMSVGA3DCONTEXT pContext = &pState->SharedCtx;
511
512	pState->ext.glUseProgram(pProgram->program);
513	GL_CHECK_ERROR();
514
515	pState->ext.glUniform1i(pProgram->sSourceTex, 0);
516	GL_CHECK_ERROR();
517
518	float aTextureInfo[4];
519	aTextureInfo[0] = (float)cWidth;
520	aTextureInfo[1] = (float)cHeight;
521	aTextureInfo[2] = 1.0f / (float)cWidth; /* Pixel width in texture coords. */
522	aTextureInfo[3] = 1.0f / (float)cHeight; /* Pixel height in texture coords. */
523
524	pState->ext.glUniform4fv(pProgram->uTexInfo, 1, aTextureInfo);
525	GL_CHECK_ERROR();
526	}
527
528	/* Attach the texture which must be used as the render target
529	* to the GL_DRAW_FRAMEBUFFER as GL_COLOR_ATTACHMENT0.
530	*/
531	static void setRenderTarget(PVMSVGA3DSTATE pState,
532	GLuint texture,
533	uint32_t iMipmap)
534	{
535	AssertReturnVoid(pState->idActiveContext == VMSVGA3D_SHARED_CTX_ID);
536
537	PVMSVGA3DFORMATCONVERTER pConv = pState->pConv;
538	AssertReturnVoid(pConv);
539
540	/* Everything is done on the shared context. The pState and pContext are for GL_CHECK_ERROR macro. */
541	PVMSVGA3DCONTEXT pContext = &pState->SharedCtx;
542
543	pState->ext.glBindFramebuffer(GL_DRAW_FRAMEBUFFER, pConv->framebuffer);
544	GL_CHECK_ERROR();
545
546	glBindTexture(GL_TEXTURE_2D, texture);
547	GL_CHECK_ERROR();
548
549	pState->ext.glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, iMipmap);
550	GL_CHECK_ERROR();
551
552	glBindTexture(GL_TEXTURE_2D, 0);
553	GL_CHECK_ERROR();
554
555	Assert(pState->ext.glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE);
556	}
557
558	/* Undo what setRenderTarget did. */
559	static void unsetRenderTarget(PVMSVGA3DSTATE pState,
560	GLuint texture)
561	{
562	AssertReturnVoid(pState->idActiveContext == VMSVGA3D_SHARED_CTX_ID);
563
564	/* Everything is done on the shared context. The pState and pContext are for GL_CHECK_ERROR macro. */
565	PVMSVGA3DCONTEXT pContext = &pState->SharedCtx;
566
567	RT_NOREF(texture);
568
569	pState->ext.glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
570	GL_CHECK_ERROR();
571
572	pState->ext.glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
573	GL_CHECK_ERROR();
574	}
575
576	/** Convert one texture to another.
577	*
578	* @param pState The backend.
579	* @param pCurrentContext The current context, which must be restored before returning.
580	* @param pSurface The surface which needs conversion.
581	* @param iMipmap The mipmap level which needs to be converted.
582	* @param fToRGB True for conversion from the intermediate texture emulated format
583	* to the RGB format of the actual texture.
584	* False for conversion from the actual RGB texture to the intermediate texture.
585	*/
586	static void doRender(PVMSVGA3DSTATE pState,
587	PVMSVGA3DCONTEXT pCurrentContext,
588	PVMSVGA3DSURFACE pSurface,
589	uint32_t iMipmap,
590	bool fToRGB)
591	{
592	if (!fToRGB)
593	{
594	/** @todo Disable readback transfers for now. They cause crash in glDrawArrays with Mesa 19.2 after
595	* a previously converted texture is deleted and another texture is being converted.
596	* Such transfer are useless anyway for the emulated YUV formats and the guest should not need them usually.
597	*/
598	return;
599	}
600
601	LogFunc(("formatConversion: idActiveContext %u, pConv %p, sid=%u, oglid=%u, oglidEmul=%u, mm=%u, %s\n",
602	pState->idActiveContext, pState->pConv, pSurface->id, pSurface->oglId.texture, pSurface->idEmulated, iMipmap, fToRGB ? "ToRGB" : "FromRGB"));
603
604	PVMSVGA3DFORMATCONVERTER pConv = pState->pConv;
605	AssertReturnVoid(pConv);
606
607	ShaderProgram *pProgram = NULL;
608	GLuint sourceTexture = 0;
609	GLuint targetTexture = 0;
610	if (fToRGB)
611	{
612	if (pSurface->format == SVGA3D_YUY2)
613	{
614	pProgram = &pConv->programYUY2ToRGB;
615	}
616	else if (pSurface->format == SVGA3D_UYVY)
617	{
618	pProgram = &pConv->programUYVYToRGB;
619	}
620	sourceTexture = pSurface->idEmulated;
621	targetTexture = pSurface->oglId.texture;
622	}
623	else
624	{
625	if (pSurface->format == SVGA3D_YUY2)
626	{
627	pProgram = &pConv->programYUY2FromRGB;
628	}
629	else if (pSurface->format == SVGA3D_UYVY)
630	{
631	pProgram = &pConv->programUYVYFromRGB;
632	}
633	sourceTexture = pSurface->oglId.texture;
634	targetTexture = pSurface->idEmulated;
635	}
636
637	AssertReturnVoid(pProgram);
638
639	PVMSVGA3DMIPMAPLEVEL pMipmapLevel;
640	int rc = vmsvga3dMipmapLevel(pSurface, 0, iMipmap, &pMipmapLevel);
641	AssertRCReturnVoid(rc);
642
643	uint32_t const cWidth = pMipmapLevel->mipmapSize.width;
644	uint32_t const cHeight = pMipmapLevel->mipmapSize.height;
645
646	/* Use the shared context, where all textures are created. */
647	PVMSVGA3DCONTEXT pContext = &pState->SharedCtx;
648	VMSVGA3D_SET_CURRENT_CONTEXT(pState, pContext);
649
650	setShaderProgram(pState, pProgram, cWidth, cHeight);
651
652	setRenderTarget(pState, targetTexture, iMipmap);
653
654	glViewport(0, 0, cWidth, cHeight);
655	GL_CHECK_ERROR();
656
657	glDisable(GL_DEPTH_TEST);
658	GL_CHECK_ERROR();
659
660	pState->ext.glActiveTexture(GL_TEXTURE0);
661	GL_CHECK_ERROR();
662
663	glBindTexture(GL_TEXTURE_2D, sourceTexture);
664	GL_CHECK_ERROR();
665
666	/* Make sure to set the simplest filter. Otherwise the conversion will not work. */
667	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
668	GL_CHECK_ERROR();
669
670	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
671	GL_CHECK_ERROR();
672
673	pState->ext.glBindBuffer(GL_ARRAY_BUFFER, pConv->vertexBuffer);
674	GL_CHECK_ERROR();
675
676	GLuint index;
677	for (index = 0; index < RT_ELEMENTS(aVertexAttribs); ++index)
678	{
679	pState->ext.glEnableVertexAttribArray(index);
680	GL_CHECK_ERROR();
681
682	pState->ext.glVertexAttribPointer(index, aVertexAttribs[index].size, aVertexAttribs[index].type,
683	aVertexAttribs[index].normalized, aVertexAttribs[index].stride,
684	(const GLvoid *)(uintptr_t)aVertexAttribs[index].offset);
685	GL_CHECK_ERROR();
686	}
687
688	glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
689	GL_CHECK_ERROR();
690
691	pState->ext.glBindBuffer(GL_ARRAY_BUFFER, 0);
692	GL_CHECK_ERROR();
693
694	glBindTexture(GL_TEXTURE_2D, 0);
695	GL_CHECK_ERROR();
696
697	unsetRenderTarget(pState, targetTexture);
698
699	pState->ext.glUseProgram(0);
700	GL_CHECK_ERROR();
701
702	for (index = 0; index < RT_ELEMENTS(aVertexAttribs); ++index)
703	{
704	pState->ext.glDisableVertexAttribArray(index);
705	GL_CHECK_ERROR();
706	}
707
708	/* Restore the current context. */
709	VMSVGA3D_SET_CURRENT_CONTEXT(pState, pCurrentContext);
710	}
711
712	void FormatConvUpdateTexture(PVMSVGA3DSTATE pState,
713	PVMSVGA3DCONTEXT pCurrentContext,
714	PVMSVGA3DSURFACE pSurface,
715	uint32_t iMipmap)
716	{
717	doRender(pState, pCurrentContext, pSurface, iMipmap, true);
718	}
719
720	void FormatConvReadTexture(PVMSVGA3DSTATE pState,
721	PVMSVGA3DCONTEXT pCurrentContext,
722	PVMSVGA3DSURFACE pSurface,
723	uint32_t iMipmap)
724	{
725	doRender(pState, pCurrentContext, pSurface, iMipmap, false);
726	}
727
728	void vmsvga3dOnSharedContextDefine(PVMSVGA3DSTATE pState)
729	{
730	/* Use the shared context, where all textures are created. */
731	PVMSVGA3DCONTEXT pContext = &pState->SharedCtx;
732	VMSVGA3D_SET_CURRENT_CONTEXT(pState, pContext);
733
734	/*
735	* Format conversion.
736	*/
737	Assert(pState->pConv == NULL);
738
739	pState->pConv = (VMSVGA3DFORMATCONVERTER *)RTMemAllocZ(sizeof(VMSVGA3DFORMATCONVERTER));
740	AssertReturnVoid(pState->pConv);
741
742	formatConversionInit(pState);
743	}
744
745	void vmsvga3dOnSharedContextDestroy(PVMSVGA3DSTATE pState)
746	{
747	/* Use the shared context, where all textures are created. */
748	PVMSVGA3DCONTEXT pContext = &pState->SharedCtx;
749	VMSVGA3D_SET_CURRENT_CONTEXT(pState, pContext);
750
751	if (pState->pConv)
752	{
753	formatConversionDestroy(pState);
754
755	RTMemFree(pState->pConv);
756	pState->pConv = NULL;
757	}
758	}

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source: vbox/trunk/src/VBox/Devices/Graphics/DevVGA-SVGA3d-glHlp.cpp@ 93445

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