15e4d14dfa
These offer a simpler and more efficient means for temporarily transitioning to CPU-accessible memory for fallback implementations. v2: Do not attempt fallbacks with GLAMOR_DRM_ONLY pixmaps glamor cannot transfer pixels for GLAMOR_DRM_ONLY pixmaps using glReadPixels and glTexSubImage2D, and so there's no way to perform fallback operations with these pixmaps. v3: Clear ->pbo field when deleting the PBO. Otherwise, we'd reuse the old name next time we fall back on the pixmap, which would potentially conflict with some other pixmap that genned a new name, or just do a lazy allocation of the name (compat GL context, like we currently use) or error out (core GL context, like we hope to use some day). Also, style fixes. Changes by anholt, acked by keithp. Signed-off-by: Keith Packard <keithp@keithp.com> Reviewed-by: Eric Anholt <eric@anholt.net>
275 lines
8.4 KiB
C
275 lines
8.4 KiB
C
/*
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* Copyright © 2014 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include "glamor_priv.h"
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#include "glamor_prepare.h"
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#include "glamor_transfer.h"
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/*
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* Make a pixmap ready to draw with fb by
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* creating a PBO large enough for the whole object
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* and downloading all of the FBOs into it.
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*/
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static Bool
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glamor_prep_pixmap_box(PixmapPtr pixmap, glamor_access_t access, BoxPtr box)
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{
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ScreenPtr screen = pixmap->drawable.pScreen;
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glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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glamor_pixmap_private *priv = glamor_get_pixmap_private(pixmap);
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int gl_access, gl_usage;
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RegionRec region;
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if (priv->type == GLAMOR_DRM_ONLY)
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return FALSE;
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if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(priv))
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return TRUE;
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RegionInit(®ion, box, 1);
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/* See if it's already mapped */
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if (pixmap->devPrivate.ptr) {
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/*
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* Someone else has mapped this pixmap;
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* we'll assume that it's directly mapped
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* by a lower level driver
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*/
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if (!priv->base.prepared)
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return TRUE;
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/* In X, multiple Drawables can be stored in the same Pixmap (such as
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* each individual window in a non-composited screen pixmap, or the
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* reparented window contents inside the window-manager-decorated window
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* pixmap on a composited screen).
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*
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* As a result, when doing a series of mappings for a fallback, we may
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* need to add more boxes to the set of data we've downloaded, as we go.
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*/
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RegionSubtract(®ion, ®ion, &priv->base.prepare_region);
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if (!RegionNotEmpty(®ion))
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return TRUE;
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if (access == GLAMOR_ACCESS_RW)
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FatalError("attempt to remap buffer as writable");
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if (priv->base.pbo) {
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glBindBuffer(GL_PIXEL_PACK_BUFFER, priv->base.pbo);
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glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
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pixmap->devPrivate.ptr = NULL;
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}
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} else {
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RegionInit(&priv->base.prepare_region, box, 1);
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if (glamor_priv->has_rw_pbo) {
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if (priv->base.pbo == 0)
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glGenBuffers(1, &priv->base.pbo);
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if (access == GLAMOR_ACCESS_RW)
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gl_usage = GL_DYNAMIC_DRAW;
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else
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gl_usage = GL_STREAM_READ;
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glBindBuffer(GL_PIXEL_PACK_BUFFER, priv->base.pbo);
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glBufferData(GL_PIXEL_PACK_BUFFER,
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pixmap->devKind * pixmap->drawable.height, NULL,
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gl_usage);
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} else {
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pixmap->devPrivate.ptr = malloc(pixmap->devKind *
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pixmap->drawable.height);
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if (!pixmap->devPrivate.ptr)
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return FALSE;
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}
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priv->base.map_access = access;
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}
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glamor_download_boxes(pixmap, RegionRects(®ion), RegionNumRects(®ion),
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0, 0, 0, 0, pixmap->devPrivate.ptr, pixmap->devKind);
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RegionUninit(®ion);
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if (glamor_priv->has_rw_pbo) {
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if (priv->base.map_access == GLAMOR_ACCESS_RW)
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gl_access = GL_READ_WRITE;
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else
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gl_access = GL_READ_ONLY;
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pixmap->devPrivate.ptr = glMapBuffer(GL_PIXEL_PACK_BUFFER, gl_access);
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glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
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}
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priv->base.prepared = TRUE;
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return TRUE;
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}
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/*
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* When we're done with the drawable, unmap the PBO, reupload
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* if we were writing to it and then unbind it to release the memory
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*/
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static void
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glamor_fini_pixmap(PixmapPtr pixmap)
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{
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ScreenPtr screen = pixmap->drawable.pScreen;
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glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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glamor_pixmap_private *priv = glamor_get_pixmap_private(pixmap);
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if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(priv))
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return;
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if (!priv->base.prepared)
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return;
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if (glamor_priv->has_rw_pbo) {
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glBindBuffer(GL_PIXEL_UNPACK_BUFFER, priv->base.pbo);
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glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
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pixmap->devPrivate.ptr = NULL;
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}
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if (priv->base.map_access == GLAMOR_ACCESS_RW) {
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glamor_upload_boxes(pixmap,
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RegionRects(&priv->base.prepare_region),
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RegionNumRects(&priv->base.prepare_region),
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0, 0, 0, 0, pixmap->devPrivate.ptr, pixmap->devKind);
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}
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RegionUninit(&priv->base.prepare_region);
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if (glamor_priv->has_rw_pbo) {
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glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
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glDeleteBuffers(1, &priv->base.pbo);
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priv->base.pbo = 0;
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} else {
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free(pixmap->devPrivate.ptr);
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pixmap->devPrivate.ptr = NULL;
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}
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priv->base.prepared = FALSE;
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}
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Bool
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glamor_prepare_access(DrawablePtr drawable, glamor_access_t access)
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{
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PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
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BoxRec box;
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int off_x, off_y;
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glamor_get_drawable_deltas(drawable, pixmap, &off_x, &off_y);
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box.x1 = drawable->x + off_x;
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box.x2 = box.x1 + drawable->width;
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box.y1 = drawable->y + off_y;
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box.y2 = box.y1 + drawable->height;
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return glamor_prep_pixmap_box(pixmap, access, &box);
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}
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Bool
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glamor_prepare_access_box(DrawablePtr drawable, glamor_access_t access,
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int x, int y, int w, int h)
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{
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PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
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BoxRec box;
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int off_x, off_y;
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glamor_get_drawable_deltas(drawable, pixmap, &off_x, &off_y);
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box.x1 = drawable->x + x + off_x;
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box.x2 = box.x1 + w;
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box.y1 = drawable->y + y + off_y;
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box.y2 = box.y1 + h;
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return glamor_prep_pixmap_box(pixmap, access, &box);
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}
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void
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glamor_finish_access(DrawablePtr drawable)
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{
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glamor_fini_pixmap(glamor_get_drawable_pixmap(drawable));
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}
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/*
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* Make a picture ready to use with fb.
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*/
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Bool
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glamor_prepare_access_picture(PicturePtr picture, glamor_access_t access)
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{
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if (!picture || !picture->pDrawable)
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return TRUE;
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return glamor_prepare_access(picture->pDrawable, access);
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}
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Bool
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glamor_prepare_access_picture_box(PicturePtr picture, glamor_access_t access,
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int x, int y, int w, int h)
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{
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if (!picture || !picture->pDrawable)
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return TRUE;
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return glamor_prepare_access_box(picture->pDrawable, access,
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x, y, w, h);
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}
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void
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glamor_finish_access_picture(PicturePtr picture)
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{
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if (!picture || !picture->pDrawable)
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return;
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glamor_finish_access(picture->pDrawable);
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}
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/*
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* Make a GC ready to use with fb. This just
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* means making sure the appropriate fill pixmap is
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* in CPU memory again
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*/
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Bool
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glamor_prepare_access_gc(GCPtr gc)
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{
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switch (gc->fillStyle) {
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case FillTiled:
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return glamor_prepare_access(&gc->tile.pixmap->drawable,
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GLAMOR_ACCESS_RO);
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case FillStippled:
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case FillOpaqueStippled:
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return glamor_prepare_access(&gc->stipple->drawable, GLAMOR_ACCESS_RO);
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}
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return TRUE;
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}
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/*
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* Free any temporary CPU pixmaps for the GC
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*/
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void
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glamor_finish_access_gc(GCPtr gc)
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{
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switch (gc->fillStyle) {
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case FillTiled:
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glamor_finish_access(&gc->tile.pixmap->drawable);
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break;
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case FillStippled:
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case FillOpaqueStippled:
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glamor_finish_access(&gc->stipple->drawable);
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break;
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}
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}
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