xserver

glamor_rects.c (7139B)

---

 /*
  * 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_program.h"
 #include "glamor_transform.h"
 
 static const glamor_facet glamor_facet_polyfillrect_130 = {
     .name = "poly_fill_rect",
     .version = 130,
     .source_name = "size",
     .vs_vars = "attribute vec2 primitive;\n"
                "attribute vec2 size;\n",
     .vs_exec = ("       vec2 pos = size * vec2(gl_VertexID&1, (gl_VertexID&2)>>1);\n"
                 GLAMOR_POS(gl_Position, (primitive.xy + pos))),
 };
 
 static const glamor_facet glamor_facet_polyfillrect_120 = {
     .name = "poly_fill_rect",
     .vs_vars = "attribute vec2 primitive;\n",
     .vs_exec = ("        vec2 pos = vec2(0,0);\n"
                 GLAMOR_POS(gl_Position, primitive.xy)),
 };
 
 static Bool
 glamor_poly_fill_rect_gl(DrawablePtr drawable,
                          GCPtr gc, int nrect, xRectangle *prect)
 {
     ScreenPtr screen = drawable->pScreen;
     glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
     PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
     glamor_pixmap_private *pixmap_priv;
     glamor_program *prog;
     int off_x, off_y;
     GLshort *v;
     char *vbo_offset;
     int box_index;
     Bool ret = FALSE;
     BoxRec bounds = glamor_no_rendering_bounds();
 
     pixmap_priv = glamor_get_pixmap_private(pixmap);
     if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
         goto bail;
 
     glamor_make_current(glamor_priv);
 
     if (nrect < 100) {
         bounds = glamor_start_rendering_bounds();
         for (int i = 0; i < nrect; i++)
             glamor_bounds_union_rect(&bounds, &prect[i]);
     }
 
     if (glamor_glsl_has_ints(glamor_priv)) {
         prog = glamor_use_program_fill(pixmap, gc,
                                        &glamor_priv->poly_fill_rect_program,
                                        &glamor_facet_polyfillrect_130);
 
         if (!prog)
             goto bail;
 
         /* Set up the vertex buffers for the points */
 
         v = glamor_get_vbo_space(drawable->pScreen, nrect * sizeof (xRectangle), &vbo_offset);
 
         glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
         glVertexAttribDivisor(GLAMOR_VERTEX_POS, 1);
         glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE,
                               4 * sizeof (short), vbo_offset);
 
         glEnableVertexAttribArray(GLAMOR_VERTEX_SOURCE);
         glVertexAttribDivisor(GLAMOR_VERTEX_SOURCE, 1);
         glVertexAttribPointer(GLAMOR_VERTEX_SOURCE, 2, GL_UNSIGNED_SHORT, GL_FALSE,
                               4 * sizeof (short), vbo_offset + 2 * sizeof (short));
 
         memcpy(v, prect, nrect * sizeof (xRectangle));
 
         glamor_put_vbo_space(screen);
     } else {
         int n;
 
         prog = glamor_use_program_fill(pixmap, gc,
                                        &glamor_priv->poly_fill_rect_program,
                                        &glamor_facet_polyfillrect_120);
 
         if (!prog)
             goto bail;
 
         /* Set up the vertex buffers for the points */
 
         v = glamor_get_vbo_space(drawable->pScreen, nrect * 8 * sizeof (short), &vbo_offset);
 
         glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
         glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE,
                               2 * sizeof (short), vbo_offset);
 
         for (n = 0; n < nrect; n++) {
             v[0] = prect->x;                v[1] = prect->y;
             v[2] = prect->x;                v[3] = prect->y + prect->height;
             v[4] = prect->x + prect->width; v[5] = prect->y + prect->height;
             v[6] = prect->x + prect->width; v[7] = prect->y;
             prect++;
             v += 8;
         }
 
         glamor_put_vbo_space(screen);
     }
 
     glEnable(GL_SCISSOR_TEST);
 
     glamor_pixmap_loop(pixmap_priv, box_index) {
         int nbox = RegionNumRects(gc->pCompositeClip);
         BoxPtr box = RegionRects(gc->pCompositeClip);
 
         if (!glamor_set_destination_drawable(drawable, box_index, TRUE, FALSE,
                                              prog->matrix_uniform, &off_x, &off_y))
             goto bail;
 
         while (nbox--) {
             BoxRec scissor = {
                 .x1 = max(box->x1, bounds.x1 + drawable->x),
                 .y1 = max(box->y1, bounds.y1 + drawable->y),
                 .x2 = min(box->x2, bounds.x2 + drawable->x),
                 .y2 = min(box->y2, bounds.y2 + drawable->y),
             };
 
             box++;
 
             if (scissor.x1 >= scissor.x2 || scissor.y1 >= scissor.y2)
                 continue;
 
             glScissor(scissor.x1 + off_x,
                       scissor.y1 + off_y,
                       scissor.x2 - scissor.x1,
                       scissor.y2 - scissor.y1);
             if (glamor_glsl_has_ints(glamor_priv))
                 glDrawArraysInstanced(GL_TRIANGLE_STRIP, 0, 4, nrect);
             else {
                 glamor_glDrawArrays_GL_QUADS(glamor_priv, nrect);
             }
         }
     }
 
     ret = TRUE;
 
 bail:
     glDisable(GL_SCISSOR_TEST);
     if (glamor_glsl_has_ints(glamor_priv)) {
         glVertexAttribDivisor(GLAMOR_VERTEX_SOURCE, 0);
         glDisableVertexAttribArray(GLAMOR_VERTEX_SOURCE);
         glVertexAttribDivisor(GLAMOR_VERTEX_POS, 0);
     }
     glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
 
     return ret;
 }
 
 static void
 glamor_poly_fill_rect_bail(DrawablePtr drawable,
                            GCPtr gc, int nrect, xRectangle *prect)
 {
     glamor_fallback("to %p (%c)\n", drawable,
                     glamor_get_drawable_location(drawable));
     if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW) &&
         glamor_prepare_access_gc(gc)) {
         fbPolyFillRect(drawable, gc, nrect, prect);
     }
     glamor_finish_access_gc(gc);
     glamor_finish_access(drawable);
 }
 
 void
 glamor_poly_fill_rect(DrawablePtr drawable,
                       GCPtr gc, int nrect, xRectangle *prect)
 {
     if (glamor_poly_fill_rect_gl(drawable, gc, nrect, prect))
         return;
     glamor_poly_fill_rect_bail(drawable, gc, nrect, prect);
 }