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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_transform.h"
#include "glamor_program.h"
static Bool
use_solid(PixmapPtr pixmap, GCPtr gc, glamor_program *prog, void *arg)
{
return glamor_set_solid(pixmap, gc, TRUE, prog->fg_uniform);
}
const glamor_facet glamor_fill_solid = {
.name = "solid",
.fs_exec = " gl_FragColor = fg;\n",
.locations = glamor_program_location_fg,
.use = use_solid,
};
static Bool
use_tile(PixmapPtr pixmap, GCPtr gc, glamor_program *prog, void *arg)
{
return glamor_set_tiled(pixmap, gc, prog->fill_offset_uniform, prog->fill_size_uniform);
}
static const glamor_facet glamor_fill_tile = {
.name = "tile",
.version = 130,
.vs_exec = " fill_pos = fill_offset + primitive.xy + pos;\n",
.fs_exec = " gl_FragColor = texelFetch(sampler, ivec2(mod(fill_pos,fill_size)), 0);\n",
.locations = glamor_program_location_fill,
.use = use_tile,
};
#if 0
static Bool
use_stipple(PixmapPtr pixmap, GCPtr gc, glamor_program *prog)
{
return glamor_set_stippled(pixmap, gc, prog->fg_uniform, prog->fill_offset_uniform, prog->fill_size_uniform);
}
static const glamor_facet glamor_fill_stipple = {
.name = "stipple",
.version = 130,
.vs_exec = " fill_pos = fill_offset + primitive.xy + pos;\n";
.fs_exec = (" if (texelFetch(sampler, ivec2(mod(fill_pos,fill_size)), 0).x == 0)\n"
" discard;\n"
" gl_FragColor = fg;\n")
.locations = glamor_program_location_fg | glamor_program_location_fill
.use = use_stipple,
};
static const glamor_facet glamor_fill_opaque_stipple = {
.name = "opaque_stipple",
.version = 130,
.vs_exec = " fill_pos = fill_offset + primitive.xy + pos;\n";
.fs_exec = (" if (texelFetch(sampler, ivec2(mod(fill_pos,fill_size)), 0).x == 0)\n"
" gl_FragColor = bg;\n"
" else\n"
" gl_FragColor = fg;\n"),
.locations = glamor_program_location_fg | glamor_program_location_bg | glamor_program_location_fill
.use = use_opaque_stipple
};
#endif
static const glamor_facet *glamor_facet_fill[4] = {
&glamor_fill_solid,
&glamor_fill_tile,
NULL,
NULL,
};
typedef struct {
glamor_program_location location;
const char *vs_vars;
const char *fs_vars;
} glamor_location_var;
static glamor_location_var location_vars[] = {
{
.location = glamor_program_location_fg,
.fs_vars = "uniform vec4 fg;\n"
},
{
.location = glamor_program_location_bg,
.fs_vars = "uniform vec4 bg;\n"
},
{
.location = glamor_program_location_fill,
.vs_vars = ("uniform vec2 fill_offset;\n"
"varying vec2 fill_pos;\n"),
.fs_vars = ("uniform sampler2D sampler;\n"
"uniform vec2 fill_size;\n"
"varying vec2 fill_pos;\n")
},
{
.location = glamor_program_location_font,
.fs_vars = "uniform usampler2D font;\n",
},
};
#define NUM_LOCATION_VARS (sizeof location_vars / sizeof location_vars[0])
static char *
add_var(char *cur, const char *add)
{
char *new;
if (!add)
return cur;
new = realloc(cur, strlen(cur) + strlen(add) + 1);
if (!new) {
free(cur);
return NULL;
}
strcat(new, add);
return new;
}
static char *
vs_location_vars(glamor_program_location locations)
{
int l;
char *vars = strdup("");
for (l = 0; vars && l < NUM_LOCATION_VARS; l++)
if (locations & location_vars[l].location)
vars = add_var(vars, location_vars[l].vs_vars);
return vars;
}
static char *
fs_location_vars(glamor_program_location locations)
{
int l;
char *vars = strdup("");
for (l = 0; vars && l < NUM_LOCATION_VARS; l++)
if (locations & location_vars[l].location)
vars = add_var(vars, location_vars[l].fs_vars);
return vars;
}
static const char vs_template[] =
"%s" /* version */
"%s" /* prim vs_vars */
"%s" /* fill vs_vars */
"%s" /* location vs_vars */
GLAMOR_DECLARE_MATRIX
"void main() {\n"
"%s" /* prim vs_exec, outputs 'pos' and gl_Position */
"%s" /* fill vs_exec */
"}\n";
static const char fs_template[] =
"%s" /* version */
GLAMOR_DEFAULT_PRECISION
"%s" /* prim fs_vars */
"%s" /* fill fs_vars */
"%s" /* location fs_vars */
"void main() {\n"
"%s" /* prim fs_exec */
"%s" /* fill fs_exec */
"}\n";
static const char *
str(const char *s)
{
if (!s)
return "";
return s;
}
static const glamor_facet facet_null_fill = {
.name = ""
};
static GLint
glamor_get_uniform(glamor_program *prog,
glamor_program_location location,
const char *name)
{
GLint uniform;
if (location && (prog->locations & location) == 0)
return -2;
uniform = glGetUniformLocation(prog->prog, name);
#if DBG
ErrorF("%s uniform %d\n", name, uniform);
#endif
return uniform;
}
Bool
glamor_build_program(ScreenPtr screen,
glamor_program *prog,
const glamor_facet *prim,
const glamor_facet *fill)
{
glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
glamor_program_location locations = prim->locations;
glamor_program_flag flags = prim->flags;
int version = prim->version;
char *version_string = NULL;
char *fs_vars = NULL;
char *vs_vars = NULL;
char *vs_prog_string;
char *fs_prog_string;
GLint fs_prog, vs_prog;
if (!fill)
fill = &facet_null_fill;
locations |= fill->locations;
flags |= fill->flags;
version = MAX(version, fill->version);
if (version >= 130) {
/* Would be nice to have a cleaner test for GLSL 1.30 support,
* but for now this should suffice
*/
if (glamor_priv->gl_flavor != GLAMOR_GL_DESKTOP ||
epoxy_gl_version() < 30) {
goto fail;
}
}
vs_vars = vs_location_vars(locations);
fs_vars = fs_location_vars(locations);
if (!vs_vars)
goto fail;
if (!fs_vars)
goto fail;
if (version) {
if (asprintf(&version_string, "#version %d\n", version) < 0)
version_string = NULL;
if (!version_string)
goto fail;
}
if (asprintf(&vs_prog_string,
vs_template,
str(version_string),
str(prim->vs_vars),
str(fill->vs_vars),
vs_vars,
str(prim->vs_exec),
str(fill->vs_exec)) < 0)
vs_prog_string = NULL;
if (asprintf(&fs_prog_string,
fs_template,
str(version_string),
str(prim->fs_vars),
str(fill->fs_vars),
fs_vars,
str(prim->fs_exec),
str(fill->fs_exec)) < 0)
fs_prog_string = NULL;
if (!vs_prog_string || !fs_prog_string)
goto fail;
#define DBG 0
#if DBG
ErrorF("\nPrograms for %s %s\nVertex shader:\n\n%s\n\nFragment Shader:\n\n%s",
prim->name, fill->name, vs_prog_string, fs_prog_string);
#endif
prog->prog = glCreateProgram();
prog->flags = flags;
prog->locations = locations;
prog->prim_use = prim->use;
prog->fill_use = fill->use;
vs_prog = glamor_compile_glsl_prog(GL_VERTEX_SHADER, vs_prog_string);
fs_prog = glamor_compile_glsl_prog(GL_FRAGMENT_SHADER, fs_prog_string);
free(vs_prog_string);
free(fs_prog_string);
glAttachShader(prog->prog, vs_prog);
glDeleteShader(vs_prog);
glAttachShader(prog->prog, fs_prog);
glDeleteShader(fs_prog);
glBindAttribLocation(prog->prog, GLAMOR_VERTEX_POS, "primitive");
if (prim->source_name) {
#if DBG
ErrorF("Bind GLAMOR_VERTEX_SOURCE to %s\n", prim->source_name);
#endif
glBindAttribLocation(prog->prog, GLAMOR_VERTEX_SOURCE, prim->source_name);
}
glamor_link_glsl_prog(screen, prog->prog, "%s_%s", prim->name, fill->name);
prog->matrix_uniform = glamor_get_uniform(prog, glamor_program_location_none, "v_matrix");
prog->fg_uniform = glamor_get_uniform(prog, glamor_program_location_fg, "fg");
prog->bg_uniform = glamor_get_uniform(prog, glamor_program_location_bg, "bg");
prog->fill_offset_uniform = glamor_get_uniform(prog, glamor_program_location_fill, "fill_offset");
prog->fill_size_uniform = glamor_get_uniform(prog, glamor_program_location_fill, "fill_size");
prog->font_uniform = glamor_get_uniform(prog, glamor_program_location_font, "font");
if (glGetError() != GL_NO_ERROR)
goto fail;
free(version_string);
free(fs_vars);
free(vs_vars);
return TRUE;
fail:
prog->failed = 1;
if (prog->prog) {
glDeleteProgram(prog->prog);
prog->prog = 0;
}
free(version_string);
free(fs_vars);
free(vs_vars);
return FALSE;
}
Bool
glamor_use_program(PixmapPtr pixmap,
GCPtr gc,
glamor_program *prog,
void *arg)
{
glUseProgram(prog->prog);
if (prog->prim_use && !prog->prim_use(pixmap, gc, prog, arg))
return FALSE;
if (prog->fill_use && !prog->fill_use(pixmap, gc, prog, arg))
return FALSE;
return TRUE;
}
glamor_program *
glamor_use_program_fill(PixmapPtr pixmap,
GCPtr gc,
glamor_program_fill *program_fill,
const glamor_facet *prim)
{
ScreenPtr screen = pixmap->drawable.pScreen;
glamor_program *prog = &program_fill->progs[gc->fillStyle];
int fill_style = gc->fillStyle;
const glamor_facet *fill;
if (prog->failed)
return FALSE;
if (!prog->prog) {
fill = glamor_facet_fill[fill_style];
if (!fill)
return NULL;
if (!glamor_build_program(screen, prog, prim, fill))
return NULL;
}
if (!glamor_use_program(pixmap, gc, prog, NULL))
return NULL;
return prog;
}
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