aboutsummaryrefslogtreecommitdiff
path: root/backend/drm/renderer.c
blob: 4a16732cc490711a00a8ef3f8088a8241faf4598 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
#include <assert.h>
#include <drm_fourcc.h>
#include <gbm.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wayland-util.h>
#include <wlr/render/egl.h>
#include <wlr/render/gles2.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/util/log.h>
#include "backend/drm/drm.h"

bool init_drm_renderer(struct wlr_drm_backend *drm,
		struct wlr_drm_renderer *renderer, wlr_renderer_create_func_t create_renderer_func) {
	renderer->gbm = gbm_create_device(drm->fd);
	if (!renderer->gbm) {
		wlr_log(WLR_ERROR, "Failed to create GBM device");
		return false;
	}

	if (!create_renderer_func) {
		create_renderer_func = wlr_renderer_autocreate;
	}

	static EGLint config_attribs[] = {
		EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
		EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
		EGL_RED_SIZE, 1,
		EGL_GREEN_SIZE, 1,
		EGL_BLUE_SIZE, 1,
		EGL_ALPHA_SIZE, 1,
		EGL_NONE,
	};

	renderer->gbm_format = GBM_FORMAT_ARGB8888;
	renderer->wlr_rend = create_renderer_func(&renderer->egl,
		EGL_PLATFORM_GBM_MESA, renderer->gbm,
		config_attribs, renderer->gbm_format);
	if (!renderer->wlr_rend) {
		wlr_log(WLR_ERROR, "Failed to create EGL/WLR renderer");
		goto error_gbm;
	}

	renderer->fd = drm->fd;
	return true;

error_gbm:
	gbm_device_destroy(renderer->gbm);
	return false;
}

void finish_drm_renderer(struct wlr_drm_renderer *renderer) {
	if (!renderer) {
		return;
	}

	wlr_renderer_destroy(renderer->wlr_rend);
	wlr_egl_finish(&renderer->egl);
	gbm_device_destroy(renderer->gbm);
}

static bool init_drm_surface(struct wlr_drm_surface *surf,
		struct wlr_drm_renderer *renderer, uint32_t width, uint32_t height,
		uint32_t format, struct wlr_drm_format_set *set, uint32_t flags) {
	if (surf->width == width && surf->height == height) {
		return true;
	}

	surf->renderer = renderer;
	surf->width = width;
	surf->height = height;

	if (surf->gbm) {
		gbm_surface_destroy(surf->gbm);
		surf->gbm = NULL;
	}
	wlr_egl_destroy_surface(&surf->renderer->egl, surf->egl);

	if (!(flags & GBM_BO_USE_LINEAR) && set != NULL) {
		const struct wlr_drm_format *drm_format =
			wlr_drm_format_set_get(set, format);
		if (drm_format != NULL) {
			surf->gbm = gbm_surface_create_with_modifiers(renderer->gbm,
				width, height, format, drm_format->modifiers, drm_format->len);
		}
	}

	if (surf->gbm == NULL) {
		surf->gbm = gbm_surface_create(renderer->gbm, width, height,
			format, GBM_BO_USE_RENDERING | flags);
	}
	if (!surf->gbm) {
		wlr_log_errno(WLR_ERROR, "Failed to create GBM surface");
		goto error_zero;
	}

	surf->egl = wlr_egl_create_surface(&renderer->egl, surf->gbm);
	if (surf->egl == EGL_NO_SURFACE) {
		wlr_log(WLR_ERROR, "Failed to create EGL surface");
		goto error_gbm;
	}

	return true;

error_gbm:
	gbm_surface_destroy(surf->gbm);
error_zero:
	memset(surf, 0, sizeof(*surf));
	return false;
}

static void finish_drm_surface(struct wlr_drm_surface *surf) {
	if (!surf || !surf->renderer) {
		return;
	}

	wlr_egl_destroy_surface(&surf->renderer->egl, surf->egl);
	if (surf->gbm) {
		gbm_surface_destroy(surf->gbm);
	}

	memset(surf, 0, sizeof(*surf));
}

bool drm_surface_make_current(struct wlr_drm_surface *surf,
		int *buffer_damage) {
	return wlr_egl_make_current(&surf->renderer->egl, surf->egl, buffer_damage);
}

bool export_drm_bo(struct gbm_bo *bo, struct wlr_dmabuf_attributes *attribs) {
	memset(attribs, 0, sizeof(struct wlr_dmabuf_attributes));

	attribs->n_planes = gbm_bo_get_plane_count(bo);
	if (attribs->n_planes > WLR_DMABUF_MAX_PLANES) {
		return false;
	}

	attribs->width = gbm_bo_get_width(bo);
	attribs->height = gbm_bo_get_height(bo);
	attribs->format = gbm_bo_get_format(bo);
	attribs->modifier = gbm_bo_get_modifier(bo);

	for (int i = 0; i < attribs->n_planes; ++i) {
		attribs->offset[i] = gbm_bo_get_offset(bo, i);
		attribs->stride[i] = gbm_bo_get_stride_for_plane(bo, i);
		attribs->fd[i] = gbm_bo_get_fd(bo);
		if (attribs->fd[i] < 0) {
			for (int j = 0; j < i; ++j) {
				close(attribs->fd[j]);
			}
			return false;
		}
	}

	return true;
}

static void free_tex(struct gbm_bo *bo, void *data) {
	struct wlr_texture *tex = data;
	wlr_texture_destroy(tex);
}

static struct wlr_texture *get_tex_for_bo(struct wlr_drm_renderer *renderer,
		struct gbm_bo *bo) {
	struct wlr_texture *tex = gbm_bo_get_user_data(bo);
	if (tex) {
		return tex;
	}

	struct wlr_dmabuf_attributes attribs;
	if (!export_drm_bo(bo, &attribs)) {
		return NULL;
	}

	tex = wlr_texture_from_dmabuf(renderer->wlr_rend, &attribs);
	if (tex) {
		gbm_bo_set_user_data(bo, tex, free_tex);
	}

	return tex;
}

void drm_plane_finish_surface(struct wlr_drm_plane *plane) {
	if (!plane) {
		return;
	}

	drm_fb_clear(&plane->pending_fb);
	drm_fb_clear(&plane->queued_fb);
	drm_fb_clear(&plane->current_fb);

	finish_drm_surface(&plane->surf);
	finish_drm_surface(&plane->mgpu_surf);
}

bool drm_plane_init_surface(struct wlr_drm_plane *plane,
		struct wlr_drm_backend *drm, int32_t width, uint32_t height,
		uint32_t format, uint32_t flags, bool with_modifiers) {
	struct wlr_drm_format_set *format_set =
		with_modifiers ? &plane->formats : NULL;

	drm_plane_finish_surface(plane);

	if (!drm->parent) {
		return init_drm_surface(&plane->surf, &drm->renderer, width, height,
			format, format_set, flags | GBM_BO_USE_SCANOUT);
	}

	if (!init_drm_surface(&plane->surf, &drm->parent->renderer,
			width, height, format, NULL,
			flags | GBM_BO_USE_LINEAR)) {
		return false;
	}

	if (!init_drm_surface(&plane->mgpu_surf, &drm->renderer,
			width, height, format, format_set,
			flags | GBM_BO_USE_SCANOUT)) {
		finish_drm_surface(&plane->surf);
		return false;
	}

	return true;
}

void drm_fb_clear(struct wlr_drm_fb *fb) {
	switch (fb->type) {
	case WLR_DRM_FB_TYPE_NONE:
		assert(!fb->bo);
		break;
	case WLR_DRM_FB_TYPE_SURFACE:
		gbm_surface_release_buffer(fb->surf->gbm, fb->bo);
		break;
	case WLR_DRM_FB_TYPE_WLR_BUFFER:
		gbm_bo_destroy(fb->bo);
		wlr_buffer_unlock(fb->wlr_buf);
		fb->wlr_buf = NULL;
		break;
	}

	fb->type = WLR_DRM_FB_TYPE_NONE;
	fb->bo = NULL;

	if (fb->mgpu_bo) {
		assert(fb->mgpu_surf);
		gbm_surface_release_buffer(fb->mgpu_surf->gbm, fb->mgpu_bo);
		fb->mgpu_bo = NULL;
		fb->mgpu_surf = NULL;
	}
}

bool drm_fb_lock_surface(struct wlr_drm_fb *fb, struct wlr_drm_surface *surf) {
	drm_fb_clear(fb);

	if (!wlr_egl_swap_buffers(&surf->renderer->egl, surf->egl, NULL)) {
		wlr_log(WLR_ERROR, "Failed to swap buffers");
		return false;
	}

	fb->bo = gbm_surface_lock_front_buffer(surf->gbm);
	if (!fb->bo) {
		wlr_log(WLR_ERROR, "Failed to lock front buffer");
		return false;
	}

	fb->type = WLR_DRM_FB_TYPE_SURFACE;
	fb->surf = surf;
	return true;
}

static uint32_t strip_alpha_channel(uint32_t format) {
	switch (format) {
	case DRM_FORMAT_ARGB8888:
		return DRM_FORMAT_XRGB8888;
	default:
		return DRM_FORMAT_INVALID;
	}
}

bool drm_fb_import_wlr(struct wlr_drm_fb *fb, struct wlr_drm_renderer *renderer,
		struct wlr_buffer *buf, struct wlr_drm_format_set *set) {
	drm_fb_clear(fb);

	struct wlr_dmabuf_attributes attribs;
	if (!wlr_buffer_get_dmabuf(buf, &attribs)) {
		return false;
	}

	if (!wlr_drm_format_set_has(set, attribs.format, attribs.modifier)) {
		// The format isn't supported by the plane. Try stripping the alpha
		// channel, if any.
		uint32_t format = strip_alpha_channel(attribs.format);
		if (wlr_drm_format_set_has(set, format, attribs.modifier)) {
			attribs.format = format;
		} else {
			return false;
		}
	}

	if (attribs.modifier != DRM_FORMAT_MOD_INVALID ||
			attribs.n_planes > 1 || attribs.offset[0] != 0) {
		struct gbm_import_fd_modifier_data data = {
			.width = attribs.width,
			.height = attribs.height,
			.format = attribs.format,
			.num_fds = attribs.n_planes,
			.modifier = attribs.modifier,
		};

		if ((size_t)attribs.n_planes > sizeof(data.fds) / sizeof(data.fds[0])) {
			return false;
		}

		for (size_t i = 0; i < (size_t)attribs.n_planes; ++i) {
			data.fds[i] = attribs.fd[i];
			data.strides[i] = attribs.stride[i];
			data.offsets[i] = attribs.offset[i];
		}

		fb->bo = gbm_bo_import(renderer->gbm, GBM_BO_IMPORT_FD_MODIFIER,
			&data, GBM_BO_USE_SCANOUT);
	} else {
		struct gbm_import_fd_data data = {
			.fd = attribs.fd[0],
			.width = attribs.width,
			.height = attribs.height,
			.stride = attribs.stride[0],
			.format = attribs.format,
		};

		fb->bo = gbm_bo_import(renderer->gbm, GBM_BO_IMPORT_FD,
			&data, GBM_BO_USE_SCANOUT);
	}

	if (!fb->bo) {
		return false;
	}

	fb->type = WLR_DRM_FB_TYPE_WLR_BUFFER;
	fb->wlr_buf = wlr_buffer_lock(buf);

	return true;
}

void drm_fb_move(struct wlr_drm_fb *new, struct wlr_drm_fb *old) {
	drm_fb_clear(new);

	*new = *old;
	memset(old, 0, sizeof(*old));
}

bool drm_surface_render_black_frame(struct wlr_drm_surface *surf) {
	struct wlr_renderer *renderer = surf->renderer->wlr_rend;

	if (!drm_surface_make_current(surf, NULL)) {
		return false;
	}

	wlr_renderer_begin(renderer, surf->width, surf->height);
	wlr_renderer_clear(renderer, (float[]){ 0.0, 0.0, 0.0, 1.0 });
	wlr_renderer_end(renderer);
	return true;
}

struct gbm_bo *drm_fb_acquire(struct wlr_drm_fb *fb, struct wlr_drm_backend *drm,
		struct wlr_drm_surface *mgpu) {
	if (!fb->bo) {
		wlr_log(WLR_ERROR, "Tried to acquire an FB with a NULL BO");
		return NULL;
	}

	if (!drm->parent) {
		return fb->bo;
	}

	if (fb->mgpu_bo) {
		return fb->mgpu_bo;
	}

	/* Perform copy across GPUs */

	struct wlr_renderer *renderer = mgpu->renderer->wlr_rend;

	if (!drm_surface_make_current(mgpu, NULL)) {
		return NULL;
	}

	struct wlr_texture *tex = get_tex_for_bo(mgpu->renderer, fb->bo);
	if (!tex) {
		return NULL;
	}

	float mat[9];
	wlr_matrix_projection(mat, 1, 1, WL_OUTPUT_TRANSFORM_NORMAL);

	wlr_renderer_begin(renderer, mgpu->width, mgpu->height);
	wlr_renderer_clear(renderer, (float[]){ 0.0, 0.0, 0.0, 0.0 });
	wlr_render_texture_with_matrix(renderer, tex, mat, 1.0f);
	wlr_renderer_end(renderer);

	if (!wlr_egl_swap_buffers(&mgpu->renderer->egl, mgpu->egl, NULL)) {
		wlr_log(WLR_ERROR, "Failed to swap buffers");
		return NULL;
	}

	fb->mgpu_bo = gbm_surface_lock_front_buffer(mgpu->gbm);
	if (!fb->mgpu_bo) {
		wlr_log(WLR_ERROR, "Failed to lock front buffer");
		return NULL;
	}

	fb->mgpu_surf = mgpu;
	return fb->mgpu_bo;
}