368 lines
10 KiB
C
368 lines
10 KiB
C
/*
|
|
* 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_transfer.h"
|
|
#include "glamor_prepare.h"
|
|
|
|
static const char dash_vs_vars[] =
|
|
"attribute vec3 primitive;\n"
|
|
"varying float dash_offset;\n";
|
|
|
|
static const char dash_vs_exec[] =
|
|
" dash_offset = primitive.z / dash_length;\n"
|
|
GLAMOR_POS(gl_Position, primitive.xy);
|
|
|
|
static const char dash_fs_vars[] =
|
|
"varying float dash_offset;\n";
|
|
|
|
static const char on_off_fs_exec[] =
|
|
" float pattern = texture2D(dash, vec2(dash_offset, 0.5)).w;\n"
|
|
" if (pattern == 0.0)\n"
|
|
" discard;\n";
|
|
|
|
/* XXX deal with stippled double dashed lines once we have stippling support */
|
|
static const char double_fs_exec[] =
|
|
" float pattern = texture2D(dash, vec2(dash_offset, 0.5)).w;\n"
|
|
" if (pattern == 0.0)\n"
|
|
" gl_FragColor = bg;\n"
|
|
" else\n"
|
|
" gl_FragColor = fg;\n";
|
|
|
|
|
|
static const glamor_facet glamor_facet_on_off_dash_lines = {
|
|
.version = 130,
|
|
.name = "poly_lines_on_off_dash",
|
|
.vs_vars = dash_vs_vars,
|
|
.vs_exec = dash_vs_exec,
|
|
.fs_vars = dash_fs_vars,
|
|
.fs_exec = on_off_fs_exec,
|
|
.locations = glamor_program_location_dash,
|
|
};
|
|
|
|
static const glamor_facet glamor_facet_double_dash_lines = {
|
|
.version = 130,
|
|
.name = "poly_lines_double_dash",
|
|
.vs_vars = dash_vs_vars,
|
|
.vs_exec = dash_vs_exec,
|
|
.fs_vars = dash_fs_vars,
|
|
.fs_exec = double_fs_exec,
|
|
.locations = (glamor_program_location_dash|
|
|
glamor_program_location_fg|
|
|
glamor_program_location_bg),
|
|
};
|
|
|
|
static PixmapPtr
|
|
glamor_get_dash_pixmap(GCPtr gc)
|
|
{
|
|
glamor_gc_private *gc_priv = glamor_get_gc_private(gc);
|
|
ScreenPtr screen = gc->pScreen;
|
|
PixmapPtr pixmap;
|
|
int offset;
|
|
int d;
|
|
uint32_t pixel;
|
|
GCPtr scratch_gc;
|
|
|
|
if (gc_priv->dash)
|
|
return gc_priv->dash;
|
|
|
|
offset = 0;
|
|
for (d = 0; d < gc->numInDashList; d++)
|
|
offset += gc->dash[d];
|
|
|
|
pixmap = glamor_create_pixmap(screen, offset, 1, 8, 0);
|
|
if (!pixmap)
|
|
goto bail;
|
|
|
|
scratch_gc = GetScratchGC(8, screen);
|
|
if (!scratch_gc)
|
|
goto bail_pixmap;
|
|
|
|
pixel = 0xffffffff;
|
|
offset = 0;
|
|
for (d = 0; d < gc->numInDashList; d++) {
|
|
xRectangle rect;
|
|
ChangeGCVal changes;
|
|
|
|
changes.val = pixel;
|
|
(void) ChangeGC(NullClient, scratch_gc,
|
|
GCForeground, &changes);
|
|
ValidateGC(&pixmap->drawable, scratch_gc);
|
|
rect.x = offset;
|
|
rect.y = 0;
|
|
rect.width = gc->dash[d];
|
|
rect.height = 1;
|
|
scratch_gc->ops->PolyFillRect (&pixmap->drawable, scratch_gc, 1, &rect);
|
|
offset += gc->dash[d];
|
|
pixel = ~pixel;
|
|
}
|
|
FreeScratchGC(scratch_gc);
|
|
|
|
gc_priv->dash = pixmap;
|
|
return pixmap;
|
|
|
|
bail_pixmap:
|
|
glamor_destroy_pixmap(pixmap);
|
|
bail:
|
|
return NULL;
|
|
}
|
|
|
|
static glamor_program *
|
|
glamor_dash_setup(DrawablePtr drawable, GCPtr gc)
|
|
{
|
|
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_get_pixmap_private(pixmap);
|
|
PixmapPtr dash_pixmap;
|
|
glamor_pixmap_private *dash_priv;
|
|
glamor_program *prog;
|
|
|
|
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(pixmap_priv))
|
|
goto bail;
|
|
|
|
if (gc->lineWidth != 0)
|
|
goto bail;
|
|
|
|
dash_pixmap = glamor_get_dash_pixmap(gc);
|
|
dash_priv = glamor_get_pixmap_private(pixmap);
|
|
|
|
if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(dash_priv))
|
|
goto bail;
|
|
|
|
glamor_make_current(glamor_priv);
|
|
|
|
switch (gc->lineStyle) {
|
|
case LineOnOffDash:
|
|
prog = glamor_use_program_fill(pixmap, gc,
|
|
&glamor_priv->on_off_dash_line_progs,
|
|
&glamor_facet_on_off_dash_lines);
|
|
if (!prog)
|
|
goto bail;
|
|
break;
|
|
case LineDoubleDash:
|
|
if (gc->fillStyle != FillSolid)
|
|
goto bail;
|
|
|
|
prog = &glamor_priv->double_dash_line_prog;
|
|
|
|
if (!prog->prog) {
|
|
if (!glamor_build_program(screen, prog,
|
|
&glamor_facet_double_dash_lines,
|
|
NULL, NULL, NULL))
|
|
goto bail;
|
|
}
|
|
|
|
if (!glamor_use_program(pixmap, gc, prog, NULL))
|
|
goto bail;
|
|
|
|
glamor_set_color(pixmap, gc->fgPixel, prog->fg_uniform);
|
|
glamor_set_color(pixmap, gc->bgPixel, prog->bg_uniform);
|
|
break;
|
|
|
|
default:
|
|
goto bail;
|
|
}
|
|
|
|
|
|
/* Set the dash pattern as texture 1 */
|
|
|
|
glActiveTexture(GL_TEXTURE1);
|
|
glBindTexture(GL_TEXTURE_2D, dash_priv->fbo->tex);
|
|
glUniform1i(prog->dash_uniform, 1);
|
|
glUniform1f(prog->dash_length_uniform, dash_pixmap->drawable.width);
|
|
|
|
return prog;
|
|
|
|
bail:
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
glamor_dash_loop(DrawablePtr drawable, GCPtr gc, glamor_program *prog,
|
|
int n, GLenum mode)
|
|
{
|
|
PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);
|
|
glamor_pixmap_private *pixmap_priv = glamor_get_pixmap_private(pixmap);
|
|
int box_index;
|
|
int off_x, off_y;
|
|
|
|
glEnable(GL_SCISSOR_TEST);
|
|
|
|
glamor_pixmap_loop(pixmap_priv, box_index) {
|
|
int nbox = RegionNumRects(gc->pCompositeClip);
|
|
BoxPtr box = RegionRects(gc->pCompositeClip);
|
|
|
|
glamor_set_destination_drawable(drawable, box_index, 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(mode, 0, n);
|
|
}
|
|
}
|
|
|
|
glDisable(GL_SCISSOR_TEST);
|
|
glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
|
|
}
|
|
|
|
static int
|
|
glamor_line_length(short x1, short y1, short x2, short y2)
|
|
{
|
|
return max(abs(x2 - x1), abs(y2 - y1));
|
|
}
|
|
|
|
Bool
|
|
glamor_poly_lines_dash_gl(DrawablePtr drawable, GCPtr gc,
|
|
int mode, int n, DDXPointPtr points)
|
|
{
|
|
ScreenPtr screen = drawable->pScreen;
|
|
glamor_program *prog;
|
|
short *v;
|
|
char *vbo_offset;
|
|
int add_last;
|
|
int dash_pos;
|
|
int prev_x, prev_y;
|
|
int i;
|
|
|
|
if (n < 2)
|
|
return TRUE;
|
|
|
|
if (!(prog = glamor_dash_setup(drawable, gc)))
|
|
return FALSE;
|
|
|
|
add_last = 0;
|
|
if (gc->capStyle != CapNotLast)
|
|
add_last = 1;
|
|
|
|
/* Set up the vertex buffers for the points */
|
|
|
|
v = glamor_get_vbo_space(drawable->pScreen,
|
|
(n + add_last) * 3 * sizeof (short),
|
|
&vbo_offset);
|
|
|
|
glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
|
|
glVertexAttribPointer(GLAMOR_VERTEX_POS, 3, GL_SHORT, GL_FALSE,
|
|
3 * sizeof (short), vbo_offset);
|
|
|
|
dash_pos = gc->dashOffset;
|
|
prev_x = prev_y = 0;
|
|
for (i = 0; i < n; i++) {
|
|
int this_x = points[i].x;
|
|
int this_y = points[i].y;
|
|
if (i) {
|
|
if (mode == CoordModePrevious) {
|
|
this_x += prev_x;
|
|
this_y += prev_y;
|
|
}
|
|
dash_pos += glamor_line_length(prev_x, prev_y,
|
|
this_x, this_y);
|
|
}
|
|
v[0] = prev_x = this_x;
|
|
v[1] = prev_y = this_y;
|
|
v[2] = dash_pos;
|
|
v += 3;
|
|
}
|
|
|
|
if (add_last) {
|
|
v[0] = prev_x + 1;
|
|
v[1] = prev_y;
|
|
v[2] = dash_pos + 1;
|
|
}
|
|
|
|
glamor_put_vbo_space(screen);
|
|
|
|
glamor_dash_loop(drawable, gc, prog, n + add_last, GL_LINE_STRIP);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static short *
|
|
glamor_add_segment(short *v, short x1, short y1, short x2, short y2,
|
|
int dash_start, int dash_end)
|
|
{
|
|
v[0] = x1;
|
|
v[1] = y1;
|
|
v[2] = dash_start;
|
|
|
|
v[3] = x2;
|
|
v[4] = y2;
|
|
v[5] = dash_end;
|
|
return v + 6;
|
|
}
|
|
|
|
Bool
|
|
glamor_poly_segment_dash_gl(DrawablePtr drawable, GCPtr gc,
|
|
int nseg, xSegment *segs)
|
|
{
|
|
ScreenPtr screen = drawable->pScreen;
|
|
glamor_program *prog;
|
|
short *v;
|
|
char *vbo_offset;
|
|
int dash_start = gc->dashOffset;
|
|
int add_last;
|
|
int i;
|
|
|
|
if (!(prog = glamor_dash_setup(drawable, gc)))
|
|
return FALSE;
|
|
|
|
add_last = 0;
|
|
if (gc->capStyle != CapNotLast)
|
|
add_last = 1;
|
|
|
|
/* Set up the vertex buffers for the points */
|
|
|
|
v = glamor_get_vbo_space(drawable->pScreen,
|
|
(nseg<<add_last) * 6 * sizeof (short),
|
|
&vbo_offset);
|
|
|
|
glEnableVertexAttribArray(GLAMOR_VERTEX_POS);
|
|
glVertexAttribPointer(GLAMOR_VERTEX_POS, 3, GL_SHORT, GL_FALSE,
|
|
3 * sizeof (short), vbo_offset);
|
|
|
|
for (i = 0; i < nseg; i++) {
|
|
int dash_end = dash_start + glamor_line_length(segs[i].x1, segs[i].y1,
|
|
segs[i].x2, segs[i].y2);
|
|
v = glamor_add_segment(v,
|
|
segs[i].x1, segs[i].y1,
|
|
segs[i].x2, segs[i].y2,
|
|
dash_start, dash_end);
|
|
if (add_last)
|
|
v = glamor_add_segment(v,
|
|
segs[i].x2, segs[i].y2,
|
|
segs[i].x2 + 1, segs[i].y2,
|
|
dash_end, dash_end + 1);
|
|
}
|
|
|
|
glamor_put_vbo_space(screen);
|
|
|
|
glamor_dash_loop(drawable, gc, prog, nseg << (1 + add_last), GL_LINES);
|
|
|
|
return TRUE;
|
|
}
|