glamor_segs.c (5516B)
1 /* 2 * Copyright © 2014 Keith Packard 3 * 4 * Permission to use, copy, modify, distribute, and sell this software and its 5 * documentation for any purpose is hereby granted without fee, provided that 6 * the above copyright notice appear in all copies and that both that copyright 7 * notice and this permission notice appear in supporting documentation, and 8 * that the name of the copyright holders not be used in advertising or 9 * publicity pertaining to distribution of the software without specific, 10 * written prior permission. The copyright holders make no representations 11 * about the suitability of this software for any purpose. It is provided "as 12 * is" without express or implied warranty. 13 * 14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO 16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR 17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, 18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 20 * OF THIS SOFTWARE. 21 */ 22 23 #include "glamor_priv.h" 24 #include "glamor_program.h" 25 #include "glamor_transform.h" 26 #include "glamor_prepare.h" 27 28 static const glamor_facet glamor_facet_poly_segment = { 29 .name = "poly_segment", 30 .vs_vars = "attribute vec2 primitive;\n", 31 .vs_exec = (" vec2 pos = vec2(0.0,0.0);\n" 32 GLAMOR_POS(gl_Position, primitive.xy)), 33 }; 34 35 static Bool 36 glamor_poly_segment_solid_gl(DrawablePtr drawable, GCPtr gc, 37 int nseg, xSegment *segs) 38 { 39 ScreenPtr screen = drawable->pScreen; 40 glamor_screen_private *glamor_priv = glamor_get_screen_private(screen); 41 PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable); 42 glamor_pixmap_private *pixmap_priv; 43 glamor_program *prog; 44 int off_x, off_y; 45 xSegment *v; 46 char *vbo_offset; 47 int box_index; 48 int add_last; 49 Bool ret = FALSE; 50 51 pixmap_priv = glamor_get_pixmap_private(pixmap); 52 if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv)) 53 goto bail; 54 55 add_last = 0; 56 if (gc->capStyle != CapNotLast) 57 add_last = 1; 58 59 glamor_make_current(glamor_priv); 60 61 prog = glamor_use_program_fill(pixmap, gc, 62 &glamor_priv->poly_segment_program, 63 &glamor_facet_poly_segment); 64 65 if (!prog) 66 goto bail; 67 68 /* Set up the vertex buffers for the points */ 69 70 v = glamor_get_vbo_space(drawable->pScreen, 71 (nseg << add_last) * sizeof (xSegment), 72 &vbo_offset); 73 74 glEnableVertexAttribArray(GLAMOR_VERTEX_POS); 75 glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE, 76 sizeof(DDXPointRec), vbo_offset); 77 78 if (add_last) { 79 int i, j; 80 for (i = 0, j=0; i < nseg; i++) { 81 v[j++] = segs[i]; 82 v[j].x1 = segs[i].x2; 83 v[j].y1 = segs[i].y2; 84 v[j].x2 = segs[i].x2+1; 85 v[j].y2 = segs[i].y2; 86 j++; 87 } 88 } else 89 memcpy(v, segs, nseg * sizeof (xSegment)); 90 91 glamor_put_vbo_space(screen); 92 93 glEnable(GL_SCISSOR_TEST); 94 95 glamor_pixmap_loop(pixmap_priv, box_index) { 96 int nbox = RegionNumRects(gc->pCompositeClip); 97 BoxPtr box = RegionRects(gc->pCompositeClip); 98 99 if (!glamor_set_destination_drawable(drawable, box_index, TRUE, TRUE, 100 prog->matrix_uniform, &off_x, &off_y)) 101 goto bail; 102 103 while (nbox--) { 104 glScissor(box->x1 + off_x, 105 box->y1 + off_y, 106 box->x2 - box->x1, 107 box->y2 - box->y1); 108 box++; 109 glDrawArrays(GL_LINES, 0, nseg << (1 + add_last)); 110 } 111 } 112 113 ret = TRUE; 114 115 glDisable(GL_SCISSOR_TEST); 116 glDisableVertexAttribArray(GLAMOR_VERTEX_POS); 117 118 bail: 119 return ret; 120 } 121 122 static Bool 123 glamor_poly_segment_gl(DrawablePtr drawable, GCPtr gc, 124 int nseg, xSegment *segs) 125 { 126 if (gc->lineWidth != 0) 127 return FALSE; 128 129 switch (gc->lineStyle) { 130 case LineSolid: 131 return glamor_poly_segment_solid_gl(drawable, gc, nseg, segs); 132 case LineOnOffDash: 133 return glamor_poly_segment_dash_gl(drawable, gc, nseg, segs); 134 case LineDoubleDash: 135 if (gc->fillStyle == FillTiled) 136 return glamor_poly_segment_solid_gl(drawable, gc, nseg, segs); 137 else 138 return glamor_poly_segment_dash_gl(drawable, gc, nseg, segs); 139 default: 140 return FALSE; 141 } 142 } 143 144 static void 145 glamor_poly_segment_bail(DrawablePtr drawable, GCPtr gc, 146 int nseg, xSegment *segs) 147 { 148 glamor_fallback("to %p (%c)\n", drawable, 149 glamor_get_drawable_location(drawable)); 150 151 if (gc->lineWidth == 0) { 152 if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW) && 153 glamor_prepare_access_gc(gc)) { 154 fbPolySegment(drawable, gc, nseg, segs); 155 } 156 glamor_finish_access_gc(gc); 157 glamor_finish_access(drawable); 158 } else 159 miPolySegment(drawable, gc, nseg, segs); 160 } 161 162 void 163 glamor_poly_segment(DrawablePtr drawable, GCPtr gc, 164 int nseg, xSegment *segs) 165 { 166 if (glamor_poly_segment_gl(drawable, gc, nseg, segs)) 167 return; 168 169 glamor_poly_segment_bail(drawable, gc, nseg, segs); 170 }