411 lines
13 KiB
C
411 lines
13 KiB
C
/*
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* Copyright © 2014 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include "glamor_priv.h"
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#include "glamor_transform.h"
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#include "glamor_program.h"
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static Bool
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use_solid(PixmapPtr pixmap, GCPtr gc, glamor_program *prog, void *arg)
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{
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return glamor_set_solid(pixmap, gc, TRUE, prog->fg_uniform);
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}
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const glamor_facet glamor_fill_solid = {
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.name = "solid",
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.fs_exec = " gl_FragColor = fg;\n",
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.locations = glamor_program_location_fg,
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.use = use_solid,
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};
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static Bool
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use_tile(PixmapPtr pixmap, GCPtr gc, glamor_program *prog, void *arg)
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{
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return glamor_set_tiled(pixmap, gc, prog->fill_offset_uniform, prog->fill_size_uniform);
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}
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static const glamor_facet glamor_fill_tile = {
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.name = "tile",
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.vs_exec = " fill_pos = (fill_offset + primitive.xy + pos) / fill_size;\n",
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.fs_exec = " gl_FragColor = texture2D(sampler, fill_pos);\n",
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.locations = glamor_program_location_fill,
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.use = use_tile,
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};
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static Bool
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use_stipple(PixmapPtr pixmap, GCPtr gc, glamor_program *prog, void *arg)
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{
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return glamor_set_stippled(pixmap, gc, prog->fg_uniform,
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prog->fill_offset_uniform,
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prog->fill_size_uniform);
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}
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static const glamor_facet glamor_fill_stipple = {
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.name = "stipple",
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.vs_exec = " fill_pos = (fill_offset + primitive.xy + pos) / fill_size;\n",
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.fs_exec = (" float a = texture2D(sampler, fill_pos).w;\n"
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" if (a == 0.0)\n"
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" discard;\n"
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" gl_FragColor = fg;\n"),
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.locations = glamor_program_location_fg | glamor_program_location_fill,
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.use = use_stipple,
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};
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static Bool
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use_opaque_stipple(PixmapPtr pixmap, GCPtr gc, glamor_program *prog, void *arg)
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{
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if (!use_stipple(pixmap, gc, prog, arg))
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return FALSE;
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glamor_set_color(pixmap, gc->bgPixel, prog->bg_uniform);
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return TRUE;
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}
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static const glamor_facet glamor_fill_opaque_stipple = {
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.name = "opaque_stipple",
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.vs_exec = " fill_pos = (fill_offset + primitive.xy + pos) / fill_size;\n",
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.fs_exec = (" float a = texture2D(sampler, fill_pos).w;\n"
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" if (a == 0.0)\n"
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" gl_FragColor = bg;\n"
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" else\n"
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" gl_FragColor = fg;\n"),
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.locations = glamor_program_location_fg | glamor_program_location_bg | glamor_program_location_fill,
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.use = use_opaque_stipple
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};
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static const glamor_facet *glamor_facet_fill[4] = {
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&glamor_fill_solid,
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&glamor_fill_tile,
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&glamor_fill_stipple,
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&glamor_fill_opaque_stipple,
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};
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typedef struct {
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glamor_program_location location;
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const char *vs_vars;
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const char *fs_vars;
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} glamor_location_var;
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static glamor_location_var location_vars[] = {
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{
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.location = glamor_program_location_fg,
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.fs_vars = "uniform vec4 fg;\n"
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},
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{
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.location = glamor_program_location_bg,
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.fs_vars = "uniform vec4 bg;\n"
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},
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{
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.location = glamor_program_location_fill,
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.vs_vars = ("uniform vec2 fill_offset;\n"
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"uniform vec2 fill_size;\n"
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"varying vec2 fill_pos;\n"),
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.fs_vars = ("uniform sampler2D sampler;\n"
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"uniform vec2 fill_size;\n"
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"varying vec2 fill_pos;\n")
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},
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{
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.location = glamor_program_location_font,
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.fs_vars = "uniform usampler2D font;\n",
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},
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{
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.location = glamor_program_location_bitplane,
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.fs_vars = ("uniform uvec4 bitplane;\n"
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"uniform vec4 bitmul;\n"),
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},
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{
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.location = glamor_program_location_dash,
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.vs_vars = "uniform float dash_length;\n",
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.fs_vars = "uniform sampler2D dash;\n",
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},
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};
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#define NUM_LOCATION_VARS (sizeof location_vars / sizeof location_vars[0])
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static char *
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add_var(char *cur, const char *add)
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{
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char *new;
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if (!add)
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return cur;
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new = realloc(cur, strlen(cur) + strlen(add) + 1);
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if (!new) {
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free(cur);
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return NULL;
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}
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strcat(new, add);
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return new;
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}
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static char *
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vs_location_vars(glamor_program_location locations)
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{
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int l;
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char *vars = strdup("");
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for (l = 0; vars && l < NUM_LOCATION_VARS; l++)
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if (locations & location_vars[l].location)
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vars = add_var(vars, location_vars[l].vs_vars);
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return vars;
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}
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static char *
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fs_location_vars(glamor_program_location locations)
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{
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int l;
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char *vars = strdup("");
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for (l = 0; vars && l < NUM_LOCATION_VARS; l++)
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if (locations & location_vars[l].location)
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vars = add_var(vars, location_vars[l].fs_vars);
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return vars;
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}
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static const char vs_template[] =
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"%s" /* version */
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"%s" /* prim vs_vars */
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"%s" /* fill vs_vars */
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"%s" /* location vs_vars */
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GLAMOR_DECLARE_MATRIX
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"void main() {\n"
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"%s" /* prim vs_exec, outputs 'pos' and gl_Position */
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"%s" /* fill vs_exec */
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"}\n";
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static const char fs_template[] =
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"%s" /* version */
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GLAMOR_DEFAULT_PRECISION
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"%s" /* prim fs_vars */
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"%s" /* fill fs_vars */
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"%s" /* location fs_vars */
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"void main() {\n"
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"%s" /* prim fs_exec */
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"%s" /* fill fs_exec */
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"}\n";
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static const char *
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str(const char *s)
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{
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if (!s)
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return "";
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return s;
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}
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static const glamor_facet facet_null_fill = {
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.name = ""
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};
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#define DBG 0
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static GLint
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glamor_get_uniform(glamor_program *prog,
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glamor_program_location location,
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const char *name)
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{
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GLint uniform;
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if (location && (prog->locations & location) == 0)
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return -2;
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uniform = glGetUniformLocation(prog->prog, name);
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#if DBG
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ErrorF("%s uniform %d\n", name, uniform);
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#endif
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return uniform;
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}
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Bool
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glamor_build_program(ScreenPtr screen,
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glamor_program *prog,
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const glamor_facet *prim,
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const glamor_facet *fill)
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{
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glamor_screen_private *glamor_priv = glamor_get_screen_private(screen);
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glamor_program_location locations = prim->locations;
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glamor_program_flag flags = prim->flags;
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int version = prim->version;
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char *version_string = NULL;
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char *fs_vars = NULL;
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char *vs_vars = NULL;
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char *vs_prog_string;
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char *fs_prog_string;
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GLint fs_prog, vs_prog;
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if (!fill)
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fill = &facet_null_fill;
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locations |= fill->locations;
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flags |= fill->flags;
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version = MAX(version, fill->version);
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if (version > glamor_priv->glsl_version)
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goto fail;
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vs_vars = vs_location_vars(locations);
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fs_vars = fs_location_vars(locations);
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if (!vs_vars)
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goto fail;
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if (!fs_vars)
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goto fail;
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if (version) {
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if (asprintf(&version_string, "#version %d\n", version) < 0)
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version_string = NULL;
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if (!version_string)
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goto fail;
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}
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if (asprintf(&vs_prog_string,
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vs_template,
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str(version_string),
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str(prim->vs_vars),
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str(fill->vs_vars),
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vs_vars,
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str(prim->vs_exec),
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str(fill->vs_exec)) < 0)
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vs_prog_string = NULL;
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if (asprintf(&fs_prog_string,
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fs_template,
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str(version_string),
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str(prim->fs_vars),
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str(fill->fs_vars),
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fs_vars,
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str(prim->fs_exec),
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str(fill->fs_exec)) < 0)
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fs_prog_string = NULL;
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if (!vs_prog_string || !fs_prog_string)
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goto fail;
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#if DBG
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ErrorF("\nPrograms for %s %s\nVertex shader:\n\n%s\n\nFragment Shader:\n\n%s",
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prim->name, fill->name, vs_prog_string, fs_prog_string);
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#endif
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prog->prog = glCreateProgram();
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prog->flags = flags;
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prog->locations = locations;
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prog->prim_use = prim->use;
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prog->fill_use = fill->use;
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vs_prog = glamor_compile_glsl_prog(GL_VERTEX_SHADER, vs_prog_string);
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fs_prog = glamor_compile_glsl_prog(GL_FRAGMENT_SHADER, fs_prog_string);
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free(vs_prog_string);
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free(fs_prog_string);
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glAttachShader(prog->prog, vs_prog);
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glDeleteShader(vs_prog);
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glAttachShader(prog->prog, fs_prog);
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glDeleteShader(fs_prog);
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glBindAttribLocation(prog->prog, GLAMOR_VERTEX_POS, "primitive");
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if (prim->source_name) {
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#if DBG
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ErrorF("Bind GLAMOR_VERTEX_SOURCE to %s\n", prim->source_name);
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#endif
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glBindAttribLocation(prog->prog, GLAMOR_VERTEX_SOURCE, prim->source_name);
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}
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glamor_link_glsl_prog(screen, prog->prog, "%s_%s", prim->name, fill->name);
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prog->matrix_uniform = glamor_get_uniform(prog, glamor_program_location_none, "v_matrix");
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prog->fg_uniform = glamor_get_uniform(prog, glamor_program_location_fg, "fg");
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prog->bg_uniform = glamor_get_uniform(prog, glamor_program_location_bg, "bg");
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prog->fill_offset_uniform = glamor_get_uniform(prog, glamor_program_location_fill, "fill_offset");
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prog->fill_size_uniform = glamor_get_uniform(prog, glamor_program_location_fill, "fill_size");
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prog->font_uniform = glamor_get_uniform(prog, glamor_program_location_font, "font");
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prog->bitplane_uniform = glamor_get_uniform(prog, glamor_program_location_bitplane, "bitplane");
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prog->bitmul_uniform = glamor_get_uniform(prog, glamor_program_location_bitplane, "bitmul");
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prog->dash_uniform = glamor_get_uniform(prog, glamor_program_location_dash, "dash");
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prog->dash_length_uniform = glamor_get_uniform(prog, glamor_program_location_dash, "dash_length");
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if (glGetError() != GL_NO_ERROR)
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goto fail;
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free(version_string);
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free(fs_vars);
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free(vs_vars);
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return TRUE;
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fail:
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prog->failed = 1;
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if (prog->prog) {
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glDeleteProgram(prog->prog);
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prog->prog = 0;
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}
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free(version_string);
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free(fs_vars);
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free(vs_vars);
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return FALSE;
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}
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Bool
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glamor_use_program(PixmapPtr pixmap,
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GCPtr gc,
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glamor_program *prog,
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void *arg)
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{
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glUseProgram(prog->prog);
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if (prog->prim_use && !prog->prim_use(pixmap, gc, prog, arg))
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return FALSE;
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if (prog->fill_use && !prog->fill_use(pixmap, gc, prog, arg))
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return FALSE;
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return TRUE;
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}
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glamor_program *
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glamor_use_program_fill(PixmapPtr pixmap,
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GCPtr gc,
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glamor_program_fill *program_fill,
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const glamor_facet *prim)
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{
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ScreenPtr screen = pixmap->drawable.pScreen;
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glamor_program *prog = &program_fill->progs[gc->fillStyle];
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int fill_style = gc->fillStyle;
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const glamor_facet *fill;
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if (prog->failed)
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return FALSE;
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if (!prog->prog) {
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fill = glamor_facet_fill[fill_style];
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if (!fill)
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return NULL;
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if (!glamor_build_program(screen, prog, prim, fill))
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return NULL;
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}
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if (!glamor_use_program(pixmap, gc, prog, NULL))
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return NULL;
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return prog;
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}
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