Edit
IABSD.fr/xenocara/xserver/glamor/glamor_prepare.c
matthieu
- xserver/glamor/glamor_prepare.c
-
/* * Copyright © 2014 Keith Packard * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ #include "glamor_priv.h" #include "glamor_prepare.h" #include "glamor_transfer.h" /* * Make a pixmap ready to draw with fb by * creating a PBO large enough for the whole object * and downloading all of the FBOs into it. */ static Bool glamor_prep_pixmap_box(PixmapPtr pixmap, glamor_access_t access, BoxPtr box) { ScreenPtr screen = pixmap->drawable.pScreen; glamor_screen_private *glamor_priv = glamor_get_screen_private(screen); glamor_pixmap_private *priv = glamor_get_pixmap_private(pixmap); int gl_access, gl_usage; RegionRec region; if (priv->type == GLAMOR_DRM_ONLY) return FALSE; if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(priv)) return TRUE; glamor_make_current(glamor_priv); RegionInit(®ion, box, 1); /* See if it's already mapped */ if (pixmap->devPrivate.ptr) { /* * Someone else has mapped this pixmap; * we'll assume that it's directly mapped * by a lower level driver */ if (!priv->prepared) return TRUE; /* In X, multiple Drawables can be stored in the same Pixmap (such as * each individual window in a non-composited screen pixmap, or the * reparented window contents inside the window-manager-decorated window * pixmap on a composited screen). * * As a result, when doing a series of mappings for a fallback, we may * need to add more boxes to the set of data we've downloaded, as we go. */ RegionSubtract(®ion, ®ion, &priv->prepare_region); if (!RegionNotEmpty(®ion)) return TRUE; if (access == GLAMOR_ACCESS_RW) FatalError("attempt to remap buffer as writable"); if (priv->pbo) { glBindBuffer(GL_PIXEL_PACK_BUFFER, priv->pbo); glUnmapBuffer(GL_PIXEL_PACK_BUFFER); pixmap->devPrivate.ptr = NULL; } } else { RegionInit(&priv->prepare_region, box, 1); if (glamor_priv->has_rw_pbo) { if (priv->pbo == 0) glGenBuffers(1, &priv->pbo); gl_usage = GL_STREAM_READ; glBindBuffer(GL_PIXEL_PACK_BUFFER, priv->pbo); glBufferData(GL_PIXEL_PACK_BUFFER, pixmap->devKind * pixmap->drawable.height, NULL, gl_usage); } else { pixmap->devPrivate.ptr = xallocarray(pixmap->devKind, pixmap->drawable.height); if (!pixmap->devPrivate.ptr) return FALSE; } priv->map_access = access; } glamor_download_boxes(pixmap, RegionRects(®ion), RegionNumRects(®ion), 0, 0, 0, 0, pixmap->devPrivate.ptr, pixmap->devKind); RegionUninit(®ion); if (glamor_priv->has_rw_pbo) { if (priv->map_access == GLAMOR_ACCESS_RW) gl_access = GL_READ_WRITE; else gl_access = GL_READ_ONLY; pixmap->devPrivate.ptr = glMapBuffer(GL_PIXEL_PACK_BUFFER, gl_access); glBindBuffer(GL_PIXEL_PACK_BUFFER, 0); } priv->prepared = TRUE; return TRUE; } /* * When we're done with the drawable, unmap the PBO, reupload * if we were writing to it and then unbind it to release the memory */ static void glamor_fini_pixmap(PixmapPtr pixmap) { ScreenPtr screen = pixmap->drawable.pScreen; glamor_screen_private *glamor_priv = glamor_get_screen_private(screen); glamor_pixmap_private *priv = glamor_get_pixmap_private(pixmap); if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(priv)) return; if (!priv->prepared) return; if (glamor_priv->has_rw_pbo) { glBindBuffer(GL_PIXEL_UNPACK_BUFFER, priv->pbo); glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER); pixmap->devPrivate.ptr = NULL; } if (priv->map_access == GLAMOR_ACCESS_RW) { glamor_upload_boxes(pixmap, RegionRects(&priv->prepare_region), RegionNumRects(&priv->prepare_region), 0, 0, 0, 0, pixmap->devPrivate.ptr, pixmap->devKind); } RegionUninit(&priv->prepare_region); if (glamor_priv->has_rw_pbo) { glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0); glDeleteBuffers(1, &priv->pbo); priv->pbo = 0; } else { free(pixmap->devPrivate.ptr); pixmap->devPrivate.ptr = NULL; } priv->prepared = FALSE; } Bool glamor_prepare_access(DrawablePtr drawable, glamor_access_t access) { PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable); BoxRec box; int off_x, off_y; glamor_get_drawable_deltas(drawable, pixmap, &off_x, &off_y); box.x1 = drawable->x + off_x; box.x2 = box.x1 + drawable->width; box.y1 = drawable->y + off_y; box.y2 = box.y1 + drawable->height; return glamor_prep_pixmap_box(pixmap, access, &box); } Bool glamor_prepare_access_box(DrawablePtr drawable, glamor_access_t access, int x, int y, int w, int h) { PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable); BoxRec box; int off_x, off_y; glamor_get_drawable_deltas(drawable, pixmap, &off_x, &off_y); box.x1 = drawable->x + x + off_x; box.x2 = box.x1 + w; box.y1 = drawable->y + y + off_y; box.y2 = box.y1 + h; return glamor_prep_pixmap_box(pixmap, access, &box); } void glamor_finish_access(DrawablePtr drawable) { glamor_fini_pixmap(glamor_get_drawable_pixmap(drawable)); } /* * Make a picture ready to use with fb. */ Bool glamor_prepare_access_picture(PicturePtr picture, glamor_access_t access) { if (!picture || !picture->pDrawable) return TRUE; return glamor_prepare_access(picture->pDrawable, access); } Bool glamor_prepare_access_picture_box(PicturePtr picture, glamor_access_t access, int x, int y, int w, int h) { if (!picture || !picture->pDrawable) return TRUE; /* If a transform is set, we don't know what the bounds is on the * source, so just prepare the whole pixmap. XXX: We could * potentially work out where in the source would be sampled based * on the transform, and we don't need do do this for destination * pixmaps at all. */ if (picture->transform) { return glamor_prepare_access_box(picture->pDrawable, access, 0, 0, picture->pDrawable->width, picture->pDrawable->height); } else { return glamor_prepare_access_box(picture->pDrawable, access, x, y, w, h); } } void glamor_finish_access_picture(PicturePtr picture) { if (!picture || !picture->pDrawable) return; glamor_finish_access(picture->pDrawable); } /* * Make a GC ready to use with fb. This just * means making sure the appropriate fill pixmap is * in CPU memory again */ Bool glamor_prepare_access_gc(GCPtr gc) { switch (gc->fillStyle) { case FillTiled: return glamor_prepare_access(&gc->tile.pixmap->drawable, GLAMOR_ACCESS_RO); case FillStippled: case FillOpaqueStippled: return glamor_prepare_access(&gc->stipple->drawable, GLAMOR_ACCESS_RO); } return TRUE; } /* * Free any temporary CPU pixmaps for the GC */ void glamor_finish_access_gc(GCPtr gc) { switch (gc->fillStyle) { case FillTiled: glamor_finish_access(&gc->tile.pixmap->drawable); break; case FillStippled: case FillOpaqueStippled: glamor_finish_access(&gc->stipple->drawable); break; } }