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https://github.com/X11Libre/xserver.git
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a311156e82
This header needs to be included first, otherwise things can easily get really messed up. The current code only works by accident, because some other header already including it early enough - but a subtle change in include order can easy break it. Thus, always make sure the header is really included first. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
195 lines
7.5 KiB
C
195 lines
7.5 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 <dix-config.h>
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#include "glamor_priv.h"
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#include "glamor_transfer.h"
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/*
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* Write a region of bits into a drawable's backing pixmap
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*/
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void
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glamor_upload_boxes(DrawablePtr drawable, BoxPtr in_boxes, int in_nbox,
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int dx_src, int dy_src,
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int dx_dst, int dy_dst,
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uint8_t *bits, uint32_t byte_stride)
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{
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ScreenPtr screen = drawable->pScreen;
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glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
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glamor_pixmap_private *priv = glamor_get_pixmap_private(pixmap);
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int box_index;
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const struct glamor_format *f = glamor_format_for_pixmap(pixmap);
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int bytes_per_pixel = PICT_FORMAT_BPP(f->render_format) >> 3;
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char *tmp_bits = NULL;
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if (glamor_drawable_effective_depth(drawable) == 24 && pixmap->drawable.depth == 32)
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tmp_bits = XNFalloc(byte_stride * pixmap->drawable.height);
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glamor_make_current(glamor_priv);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
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if (glamor_priv->has_unpack_subimage)
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glPixelStorei(GL_UNPACK_ROW_LENGTH, byte_stride / bytes_per_pixel);
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glamor_pixmap_loop(priv, box_index) {
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BoxPtr box = glamor_pixmap_box_at(priv, box_index);
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glamor_pixmap_fbo *fbo = glamor_pixmap_fbo_at(priv, box_index);
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BoxPtr boxes = in_boxes;
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int nbox = in_nbox;
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glamor_bind_texture(glamor_priv, GL_TEXTURE0, fbo, TRUE);
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while (nbox--) {
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/* compute drawable coordinates */
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int x1 = MAX(boxes->x1 + dx_dst, box->x1);
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int x2 = MIN(boxes->x2 + dx_dst, box->x2);
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int y1 = MAX(boxes->y1 + dy_dst, box->y1);
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int y2 = MIN(boxes->y2 + dy_dst, box->y2);
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uint32_t *src_line;
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size_t ofs = (y1 - dy_dst + dy_src) * byte_stride;
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ofs += (x1 - dx_dst + dx_src) * bytes_per_pixel;
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boxes++;
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if (x2 <= x1 || y2 <= y1)
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continue;
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src_line = (uint32_t *)(bits + ofs);
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if (tmp_bits) {
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uint32_t *tmp_line = (uint32_t *)(tmp_bits + ofs);
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int x, y;
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/* Make sure any sampling of the alpha channel will return 1.0 */
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for (y = y1; y < y2;
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y++, src_line += byte_stride / 4, tmp_line += byte_stride / 4) {
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for (x = 0; x < x2 - x1; x++)
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tmp_line[x] = src_line[x] | 0xff000000;
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}
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src_line = (uint32_t *)(tmp_bits + ofs);
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}
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if (glamor_priv->has_unpack_subimage ||
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x2 - x1 == byte_stride / bytes_per_pixel) {
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glTexSubImage2D(GL_TEXTURE_2D, 0,
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x1 - box->x1, y1 - box->y1,
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x2 - x1, y2 - y1,
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f->format, f->type,
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src_line);
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} else {
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for (; y1 < y2; y1++, src_line += byte_stride / bytes_per_pixel)
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glTexSubImage2D(GL_TEXTURE_2D, 0,
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x1 - box->x1, y1 - box->y1,
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x2 - x1, 1,
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f->format, f->type,
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src_line);
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}
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}
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}
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free(tmp_bits);
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if (glamor_priv->has_unpack_subimage)
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glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
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}
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/*
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* Upload a region of data
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*/
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void
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glamor_upload_region(DrawablePtr drawable, RegionPtr region,
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int region_x, int region_y,
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uint8_t *bits, uint32_t byte_stride)
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{
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glamor_upload_boxes(drawable, RegionRects(region), RegionNumRects(region),
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-region_x, -region_y,
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0, 0,
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bits, byte_stride);
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}
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/*
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* Read stuff from the drawable's backing pixmap FBOs and write to memory
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*/
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void
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glamor_download_boxes(DrawablePtr drawable, BoxPtr in_boxes, int in_nbox,
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int dx_src, int dy_src,
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int dx_dst, int dy_dst,
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uint8_t *bits, uint32_t byte_stride)
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{
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ScreenPtr screen = drawable->pScreen;
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glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
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glamor_pixmap_private *priv = glamor_get_pixmap_private(pixmap);
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int box_index;
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const struct glamor_format *f = glamor_format_for_pixmap(pixmap);
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int bytes_per_pixel = PICT_FORMAT_BPP(f->render_format) >> 3;
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glamor_make_current(glamor_priv);
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glPixelStorei(GL_PACK_ALIGNMENT, 4);
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if (glamor_priv->has_pack_subimage)
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glPixelStorei(GL_PACK_ROW_LENGTH, byte_stride / bytes_per_pixel);
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glamor_pixmap_loop(priv, box_index) {
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BoxPtr box = glamor_pixmap_box_at(priv, box_index);
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glamor_pixmap_fbo *fbo = glamor_pixmap_fbo_at(priv, box_index);
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BoxPtr boxes = in_boxes;
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int nbox = in_nbox;
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/* This should not be called on GLAMOR_FBO_NO_FBO-allocated pixmaps. */
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assert(fbo->fb);
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glBindFramebuffer(GL_FRAMEBUFFER, fbo->fb);
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while (nbox--) {
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/* compute drawable coordinates */
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int x1 = MAX(boxes->x1 + dx_src, box->x1);
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int x2 = MIN(boxes->x2 + dx_src, box->x2);
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int y1 = MAX(boxes->y1 + dy_src, box->y1);
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int y2 = MIN(boxes->y2 + dy_src, box->y2);
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size_t ofs = (y1 - dy_src + dy_dst) * byte_stride;
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ofs += (x1 - dx_src + dx_dst) * bytes_per_pixel;
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boxes++;
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if (x2 <= x1 || y2 <= y1)
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continue;
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if (glamor_priv->has_pack_subimage ||
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x2 - x1 == byte_stride / bytes_per_pixel) {
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glReadPixels(x1 - box->x1, y1 - box->y1, x2 - x1, y2 - y1, f->format, f->type, bits + ofs);
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} else {
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for (; y1 < y2; y1++, ofs += byte_stride)
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glReadPixels(x1 - box->x1, y1 - box->y1, x2 - x1, 1, f->format, f->type, bits + ofs);
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}
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}
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}
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if (glamor_priv->has_pack_subimage)
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glPixelStorei(GL_PACK_ROW_LENGTH, 0);
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}
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