fdo-mirrors/xserver
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/xorg/xserver.git synced 2025-12-24 14:50:05 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions
xserver/glamor/glamor_dash.c
Konstantin Pugin 7fda68174b glamor: support GLES3 shaders 
Some hardware (preferably mobile) working on GLES3 way faster than
on desktop GL and supports more features. This commit will allow using
GLES3 if glamor is running over GL ES, and version 3 is supported.

Changes are the following:
1. Add compatibility layer for 120/GLES2 shaders with defines in and out
2. Switch attribute and varying to in and out in almost all shaders
   (aside gradient)
3. Add newGL-only frag_color variable, which defines as gl_FragColor on
   old pipelines
4. Switch all shaders to use frag_color.
5. Previous commit is reverted, because now we have more than one GL ES
version, previous commit used to set version 100 for all ES shaders, which
is not true for ES 3

Signed-off-by: Konstantin Pugin <ria.freelander@gmail.com>
(cherry picked from commit ee107cd491)

Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1636>
2025-06-30 17:13:16 +03:00

367 lines
10 KiB
C
Raw Permalink Blame History

/*
* 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[] =
"in vec3 primitive;\n"
"out float dash_offset;\n";
static const char dash_vs_exec[] =
" dash_offset = primitive.z / dash_length;\n"
" vec2 pos = vec2(0,0);\n"
GLAMOR_POS(gl_Position, primitive.xy);
static const char dash_fs_vars[] =
"in float dash_offset;\n";
static const char on_off_fs_exec[] =
" float pattern = texture(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 = texture(dash, vec2(dash_offset, 0.5)).w;\n"
" if (pattern == 0.0)\n"
" frag_color = bg;\n"
" else\n"
" frag_color = 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(dash_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 */
glamor_bind_texture(glamor_priv, GL_TEXTURE1, dash_priv->fbo, FALSE);
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;
}
Reference in a new issue View git blame Copy permalink