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/*
* 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"
#include "glamor_prepare.h"
static const glamor_facet glamor_facet_poly_lines = {
.name = "poly_lines",
.vs_vars = "attribute vec2 primitive;\n",
.vs_exec = (" vec2 pos = vec2(0.0,0.0);\n"
GLAMOR_POS(gl_Position, primitive.xy)),
};
static Bool
glamor_poly_lines_solid_gl(DrawablePtr drawable, GCPtr gc,
int mode, int n, DDXPointPtr points)
{
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;
DDXPointPtr v;
char *vbo_offset;
int box_x, box_y;
int add_last;
pixmap_priv = glamor_get_pixmap_private(pixmap);
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
goto bail;
add_last = 0;
if (gc->capStyle != CapNotLast)
add_last = 1;
if (n < 2)
return TRUE;
glamor_make_current(glamor_priv);
prog = glamor_use_program_fill(pixmap, gc,
&glamor_priv->poly_line_program,
&glamor_facet_poly_lines);
if (!prog)
goto bail;
/* Set up the vertex buffers for the points */
v = glamor_get_vbo_space(drawable->pScreen,
(n + add_last) * sizeof (DDXPointRec),
&vbo_offset);
glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE,
sizeof (DDXPointRec), vbo_offset);
if (mode == CoordModePrevious) {
int i;
DDXPointRec here = { 0, 0 };
for (i = 0; i < n; i++) {
here.x += points[i].x;
here.y += points[i].y;
v[i] = here;
}
} else {
memcpy(v, points, n * sizeof (DDXPointRec));
}
if (add_last) {
v[n].x = v[n-1].x + 1;
v[n].y = v[n-1].y;
}
glamor_put_vbo_space(screen);
glEnable(GL_SCISSOR_TEST);
glamor_pixmap_loop(pixmap_priv, box_x, box_y) {
int nbox = RegionNumRects(gc->pCompositeClip);
BoxPtr box = RegionRects(gc->pCompositeClip);
glamor_set_destination_drawable(drawable, box_x, box_y, TRUE, TRUE,
prog->matrix_uniform, &off_x, &off_y);
while (nbox--) {
glScissor(box->x1 + off_x,
box->y1 + off_y,
box->x2 - box->x1,
box->y2 - box->y1);
box++;
glDrawArrays(GL_LINE_STRIP, 0, n + add_last);
}
}
glDisable(GL_SCISSOR_TEST);
glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
return TRUE;
bail:
return FALSE;
}
static Bool
glamor_poly_lines_gl(DrawablePtr drawable, GCPtr gc,
int mode, int n, DDXPointPtr points)
{
if (gc->lineWidth != 0)
return FALSE;
switch (gc->lineStyle) {
case LineSolid:
return glamor_poly_lines_solid_gl(drawable, gc, mode, n, points);
case LineOnOffDash:
return glamor_poly_lines_dash_gl(drawable, gc, mode, n, points);
case LineDoubleDash:
if (gc->fillStyle == FillTiled)
return glamor_poly_lines_solid_gl(drawable, gc, mode, n, points);
else
return glamor_poly_lines_dash_gl(drawable, gc, mode, n, points);
default:
return FALSE;
}
}
static void
glamor_poly_lines_bail(DrawablePtr drawable, GCPtr gc,
int mode, int n, DDXPointPtr points)
{
glamor_fallback("to %p (%c)\n", drawable,
glamor_get_drawable_location(drawable));
miPolylines(drawable, gc, mode, n, points);
}
void
glamor_poly_lines(DrawablePtr drawable, GCPtr gc,
int mode, int n, DDXPointPtr points)
{
if (glamor_poly_lines_gl(drawable, gc, mode, n, points))
return;
glamor_poly_lines_bail(drawable, gc, mode, n, points);
}
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