glamor_lines.c (5344B)
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_lines = { 29 .name = "poly_lines", 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_lines_solid_gl(DrawablePtr drawable, GCPtr gc, 37 int mode, int n, DDXPointPtr points) 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 DDXPointPtr 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 if (n < 2) 60 return TRUE; 61 62 glamor_make_current(glamor_priv); 63 64 prog = glamor_use_program_fill(pixmap, gc, 65 &glamor_priv->poly_line_program, 66 &glamor_facet_poly_lines); 67 68 if (!prog) 69 goto bail; 70 71 /* Set up the vertex buffers for the points */ 72 73 v = glamor_get_vbo_space(drawable->pScreen, 74 (n + add_last) * sizeof (DDXPointRec), 75 &vbo_offset); 76 77 glEnableVertexAttribArray(GLAMOR_VERTEX_POS); 78 glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE, 79 sizeof (DDXPointRec), vbo_offset); 80 81 if (mode == CoordModePrevious) { 82 int i; 83 DDXPointRec here = { 0, 0 }; 84 85 for (i = 0; i < n; i++) { 86 here.x += points[i].x; 87 here.y += points[i].y; 88 v[i] = here; 89 } 90 } else { 91 memcpy(v, points, n * sizeof (DDXPointRec)); 92 } 93 94 if (add_last) { 95 v[n].x = v[n-1].x + 1; 96 v[n].y = v[n-1].y; 97 } 98 99 glamor_put_vbo_space(screen); 100 101 glEnable(GL_SCISSOR_TEST); 102 103 glamor_pixmap_loop(pixmap_priv, box_index) { 104 int nbox = RegionNumRects(gc->pCompositeClip); 105 BoxPtr box = RegionRects(gc->pCompositeClip); 106 107 if (!glamor_set_destination_drawable(drawable, box_index, TRUE, TRUE, 108 prog->matrix_uniform, &off_x, &off_y)) 109 goto bail; 110 111 while (nbox--) { 112 glScissor(box->x1 + off_x, 113 box->y1 + off_y, 114 box->x2 - box->x1, 115 box->y2 - box->y1); 116 box++; 117 glDrawArrays(GL_LINE_STRIP, 0, n + add_last); 118 } 119 } 120 121 ret = TRUE; 122 123 bail: 124 glDisable(GL_SCISSOR_TEST); 125 glDisableVertexAttribArray(GLAMOR_VERTEX_POS); 126 127 return ret; 128 } 129 130 static Bool 131 glamor_poly_lines_gl(DrawablePtr drawable, GCPtr gc, 132 int mode, int n, DDXPointPtr points) 133 { 134 if (gc->lineWidth != 0) 135 return FALSE; 136 137 switch (gc->lineStyle) { 138 case LineSolid: 139 return glamor_poly_lines_solid_gl(drawable, gc, mode, n, points); 140 case LineOnOffDash: 141 return glamor_poly_lines_dash_gl(drawable, gc, mode, n, points); 142 case LineDoubleDash: 143 if (gc->fillStyle == FillTiled) 144 return glamor_poly_lines_solid_gl(drawable, gc, mode, n, points); 145 else 146 return glamor_poly_lines_dash_gl(drawable, gc, mode, n, points); 147 default: 148 return FALSE; 149 } 150 } 151 152 static void 153 glamor_poly_lines_bail(DrawablePtr drawable, GCPtr gc, 154 int mode, int n, DDXPointPtr points) 155 { 156 glamor_fallback("to %p (%c)\n", drawable, 157 glamor_get_drawable_location(drawable)); 158 159 miPolylines(drawable, gc, mode, n, points); 160 } 161 162 void 163 glamor_poly_lines(DrawablePtr drawable, GCPtr gc, 164 int mode, int n, DDXPointPtr points) 165 { 166 if (glamor_poly_lines_gl(drawable, gc, mode, n, points)) 167 return; 168 glamor_poly_lines_bail(drawable, gc, mode, n, points); 169 }