xserver

xserver with xephyr scale patch
git clone https://git.neptards.moe/u3shit/xserver.git
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glamor_points.c (4081B)

      1 /*
      2  * Copyright © 2009 Intel Corporation
      3  * Copyright © 1998 Keith Packard
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a
      6  * copy of this software and associated documentation files (the "Software"),
      7  * to deal in the Software without restriction, including without limitation
      8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      9  * and/or sell copies of the Software, and to permit persons to whom the
     10  * Software is furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice (including the next
     13  * paragraph) shall be included in all copies or substantial portions of the
     14  * Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     22  * IN THE SOFTWARE.
     23  *
     24  * Authors:
     25  *    Zhigang Gong <zhigang.gong@linux.intel.com>
     26  *
     27  */
     28 
     29 #include "glamor_priv.h"
     30 #include "glamor_transform.h"
     31 
     32 static const glamor_facet glamor_facet_point = {
     33     .name = "poly_point",
     34     .vs_vars = "attribute vec2 primitive;\n",
     35     .vs_exec = GLAMOR_POS(gl_Position, primitive),
     36 };
     37 
     38 static Bool
     39 glamor_poly_point_gl(DrawablePtr drawable, GCPtr gc, int mode, int npt, DDXPointPtr ppt)
     40 {
     41     ScreenPtr screen = drawable->pScreen;
     42     glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
     43     PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
     44     glamor_program *prog = &glamor_priv->point_prog;
     45     glamor_pixmap_private *pixmap_priv;
     46     int off_x, off_y;
     47     GLshort *vbo_ppt;
     48     char *vbo_offset;
     49     int box_index;
     50     Bool ret = FALSE;
     51 
     52     pixmap_priv = glamor_get_pixmap_private(pixmap);
     53     if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
     54         goto bail;
     55 
     56     glamor_make_current(glamor_priv);
     57 
     58     if (prog->failed)
     59         goto bail;
     60 
     61     if (!prog->prog) {
     62         if (!glamor_build_program(screen, prog,
     63                                   &glamor_facet_point,
     64                                   &glamor_fill_solid,
     65                                   NULL, NULL))
     66             goto bail;
     67     }
     68 
     69     if (!glamor_use_program(pixmap, gc, prog, NULL))
     70         goto bail;
     71 
     72     vbo_ppt = glamor_get_vbo_space(screen, npt * (2 * sizeof (INT16)), &vbo_offset);
     73     glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
     74     glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE, 0, vbo_offset);
     75     if (mode == CoordModePrevious) {
     76         int n = npt;
     77         INT16 x = 0, y = 0;
     78         while (n--) {
     79             vbo_ppt[0] = (x += ppt->x);
     80             vbo_ppt[1] = (y += ppt->y);
     81             vbo_ppt += 2;
     82             ppt++;
     83         }
     84     } else
     85         memcpy(vbo_ppt, ppt, npt * (2 * sizeof (INT16)));
     86     glamor_put_vbo_space(screen);
     87 
     88     glEnable(GL_SCISSOR_TEST);
     89 
     90     glamor_pixmap_loop(pixmap_priv, box_index) {
     91         int nbox = RegionNumRects(gc->pCompositeClip);
     92         BoxPtr box = RegionRects(gc->pCompositeClip);
     93 
     94         if (!glamor_set_destination_drawable(drawable, box_index, TRUE, TRUE,
     95                                              prog->matrix_uniform, &off_x, &off_y))
     96             goto bail;
     97 
     98         while (nbox--) {
     99             glScissor(box->x1 + off_x,
    100                       box->y1 + off_y,
    101                       box->x2 - box->x1,
    102                       box->y2 - box->y1);
    103             box++;
    104             glDrawArrays(GL_POINTS, 0, npt);
    105         }
    106     }
    107 
    108     ret = TRUE;
    109 
    110 bail:
    111     glDisable(GL_SCISSOR_TEST);
    112     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
    113 
    114     return ret;
    115 }
    116 
    117 void
    118 glamor_poly_point(DrawablePtr drawable, GCPtr gc, int mode, int npt,
    119                   DDXPointPtr ppt)
    120 {
    121     if (glamor_poly_point_gl(drawable, gc, mode, npt, ppt))
    122         return;
    123     miPolyPoint(drawable, gc, mode, npt, ppt);
    124 }