summaryrefslogtreecommitdiff
path: root/glamor/glamor_program.c
blob: 0f4d0f06a926830d8d86b6a37c0ff5f6e4daed36 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
/*
 * 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",
    .vs_exec =  "       fill_pos = (fill_offset + primitive.xy + pos) / fill_size;\n",
    .fs_exec =  "       gl_FragColor = texture2D(sampler, fill_pos);\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"
                    "uniform vec2 fill_size;\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 > glamor_priv->glsl_version)
        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;
}