235 lines
7.4 KiB
C
235 lines
7.4 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_transfer.h"
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/* XXX a kludge for now */
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void
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glamor_format_for_pixmap(PixmapPtr pixmap, GLenum *format, GLenum *type)
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{
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switch (pixmap->drawable.depth) {
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case 24:
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case 32:
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*format = GL_BGRA;
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*type = GL_UNSIGNED_INT_8_8_8_8_REV;
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break;
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case 16:
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*format = GL_RGB;
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*type = GL_UNSIGNED_SHORT_5_6_5;
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break;
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case 15:
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*format = GL_BGRA;
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*type = GL_UNSIGNED_SHORT_1_5_5_5_REV;
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break;
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case 8:
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*format = GL_ALPHA;
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*type = GL_UNSIGNED_BYTE;
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break;
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default:
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FatalError("Invalid pixmap depth %d\n", pixmap->drawable.depth);
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break;
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}
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}
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/*
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* Write a region of bits into a pixmap
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*/
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void
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glamor_upload_boxes(PixmapPtr pixmap, 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 = 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 box_x, box_y;
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int bytes_per_pixel = pixmap->drawable.bitsPerPixel >> 3;
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GLenum type;
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GLenum format;
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glamor_format_for_pixmap(pixmap, &format, &type);
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glamor_make_current(glamor_priv);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
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glPixelStorei(GL_UNPACK_ROW_LENGTH, byte_stride / bytes_per_pixel);
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glamor_pixmap_loop(priv, box_x, box_y) {
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BoxPtr box = glamor_pixmap_box_at(priv, box_x, box_y);
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glamor_pixmap_fbo *fbo = glamor_pixmap_fbo_at(priv, box_x, box_y);
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BoxPtr boxes = in_boxes;
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int nbox = in_nbox;
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, fbo->tex);
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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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boxes++;
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if (x2 <= x1 || y2 <= y1)
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continue;
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glPixelStorei(GL_UNPACK_SKIP_ROWS, y1 - dy_dst + dy_src);
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glPixelStorei(GL_UNPACK_SKIP_PIXELS, x1 - dx_dst + dx_src);
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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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format, type,
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bits);
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}
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}
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glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
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glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
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glPixelStorei(GL_UNPACK_SKIP_PIXELS, 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(PixmapPtr pixmap, 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(pixmap, 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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* Take the data in the pixmap and stuff it back into the FBO
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*/
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void
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glamor_upload_pixmap(PixmapPtr pixmap)
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{
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BoxRec box;
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box.x1 = 0;
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box.x2 = pixmap->drawable.width;
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box.y1 = 0;
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box.y2 = pixmap->drawable.height;
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glamor_upload_boxes(pixmap, &box, 1, 0, 0, 0, 0,
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pixmap->devPrivate.ptr, pixmap->devKind);
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}
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/*
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* Read stuff from the pixmap FBOs and write to memory
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*/
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void
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glamor_download_boxes(PixmapPtr pixmap, 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 = 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 box_x, box_y;
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int bytes_per_pixel = pixmap->drawable.bitsPerPixel >> 3;
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GLenum type;
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GLenum format;
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glamor_format_for_pixmap(pixmap, &format, &type);
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glamor_make_current(glamor_priv);
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glPixelStorei(GL_PACK_ALIGNMENT, 4);
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glPixelStorei(GL_PACK_ROW_LENGTH, byte_stride / bytes_per_pixel);
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glamor_pixmap_loop(priv, box_x, box_y) {
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BoxPtr box = glamor_pixmap_box_at(priv, box_x, box_y);
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glamor_pixmap_fbo *fbo = glamor_pixmap_fbo_at(priv, box_x, box_y);
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BoxPtr boxes = in_boxes;
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int nbox = in_nbox;
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glBindFramebuffer(GL_READ_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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boxes++;
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if (x2 <= x1 || y2 <= y1)
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continue;
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glPixelStorei(GL_PACK_SKIP_PIXELS, x1 - dx_src + dx_dst);
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glPixelStorei(GL_PACK_SKIP_ROWS, y1 - dy_src + dy_dst);
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glReadPixels(x1 - box->x1, y1 - box->y1, x2 - x1, y2 - y1, format, type, bits);
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}
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}
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glPixelStorei(GL_PACK_ROW_LENGTH, 0);
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glPixelStorei(GL_PACK_SKIP_ROWS, 0);
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glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
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}
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/*
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* Read data from the pixmap FBO
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*/
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void
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glamor_download_rect(PixmapPtr pixmap, int x, int y, int w, int h, uint8_t *bits)
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{
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BoxRec box;
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box.x1 = x;
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box.x2 = x + w;
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box.y1 = y;
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box.y2 = y + h;
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glamor_download_boxes(pixmap, &box, 1, 0, 0, -x, -y,
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bits, PixmapBytePad(w, pixmap->drawable.depth));
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}
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/*
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* Pull the data from the FBO down to the pixmap
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*/
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void
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glamor_download_pixmap(PixmapPtr pixmap)
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{
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BoxRec box;
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box.x1 = 0;
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box.x2 = pixmap->drawable.width;
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box.y1 = 0;
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box.y2 = pixmap->drawable.height;
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glamor_download_boxes(pixmap, &box, 1, 0, 0, 0, 0,
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pixmap->devPrivate.ptr, pixmap->devKind);
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}
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