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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_segment = {
.name = "poly_segment",
.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_segment_solid_gl(DrawablePtr drawable, GCPtr gc,
int nseg, xSegment *segs)
{
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;
xSegment *v;
char *vbo_offset;
int box_index;
int add_last;
Bool ret = FALSE;
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;
glamor_make_current(glamor_priv);
prog = glamor_use_program_fill(pixmap, gc,
&glamor_priv->poly_segment_program,
&glamor_facet_poly_segment);
if (!prog)
goto bail;
/* Set up the vertex buffers for the points */
v = glamor_get_vbo_space(drawable->pScreen,
(nseg << add_last) * sizeof (xSegment),
&vbo_offset);
glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_SHORT, GL_FALSE,
sizeof(DDXPointRec), vbo_offset);
if (add_last) {
int i, j;
for (i = 0, j=0; i < nseg; i++) {
v[j++] = segs[i];
v[j].x1 = segs[i].x2;
v[j].y1 = segs[i].y2;
v[j].x2 = segs[i].x2+1;
v[j].y2 = segs[i].y2;
j++;
}
} else
memcpy(v, segs, nseg * sizeof (xSegment));
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, TRUE,
prog->matrix_uniform, &off_x, &off_y))
goto bail;
while (nbox--) {
glScissor(box->x1 + off_x,
box->y1 + off_y,
box->x2 - box->x1,
box->y2 - box->y1);
box++;
glDrawArrays(GL_LINES, 0, nseg << (1 + add_last));
}
}
ret = TRUE;
glDisable(GL_SCISSOR_TEST);
glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
bail:
return ret;
}
static Bool
glamor_poly_segment_gl(DrawablePtr drawable, GCPtr gc,
int nseg, xSegment *segs)
{
if (gc->lineWidth != 0)
return FALSE;
switch (gc->lineStyle) {
case LineSolid:
return glamor_poly_segment_solid_gl(drawable, gc, nseg, segs);
case LineOnOffDash:
return glamor_poly_segment_dash_gl(drawable, gc, nseg, segs);
case LineDoubleDash:
if (gc->fillStyle == FillTiled)
return glamor_poly_segment_solid_gl(drawable, gc, nseg, segs);
else
return glamor_poly_segment_dash_gl(drawable, gc, nseg, segs);
default:
return FALSE;
}
}
static void
glamor_poly_segment_bail(DrawablePtr drawable, GCPtr gc,
int nseg, xSegment *segs)
{
glamor_fallback("to %p (%c)\n", drawable,
glamor_get_drawable_location(drawable));
if (gc->lineWidth == 0) {
if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW) &&
glamor_prepare_access_gc(gc)) {
fbPolySegment(drawable, gc, nseg, segs);
}
glamor_finish_access_gc(gc);
glamor_finish_access(drawable);
} else
miPolySegment(drawable, gc, nseg, segs);
}
void
glamor_poly_segment(DrawablePtr drawable, GCPtr gc,
int nseg, xSegment *segs)
{
if (glamor_poly_segment_gl(drawable, gc, nseg, segs))
return;
glamor_poly_segment_bail(drawable, gc, nseg, segs);
}
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