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1d47473a7b
mpv/video/out/opengl/shader_cache.c
Niklas Haas 1d47473a7b
vo_opengl: use UBOs where supported/required 
This also introduces RA_CAP_GLOBAL_UNIFORM. If this is not set, UBOs
*must* be used for non-bindings. Currently the cap is ignored though,
and the shader_cache *always* generates UBO-using code where it can.
Could be made an option in principle.

Only enabled for drivers new enough to support explicit UBO offsets,
just in case...

No change to performance, which is probably what we expect.
2017-08-27 14:36:04 +02:00

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#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <assert.h>
#include <libavutil/sha.h>
#include <libavutil/mem.h>
#include "osdep/io.h"
#include "common/common.h"
#include "options/path.h"
#include "stream/stream.h"
#include "shader_cache.h"
#include "formats.h"
#include "utils.h"
// Force cache flush if more than this number of shaders is created.
#define SC_MAX_ENTRIES 48
union uniform_val {
float f[9]; // RA_VARTYPE_FLOAT
int i[4]; // RA_VARTYPE_INT
struct ra_tex *tex; // RA_VARTYPE_TEX, RA_VARTYPE_IMG_*
struct ra_buf *buf; // RA_VARTYPE_BUF_*
};
struct sc_uniform {
struct ra_renderpass_input input;
const char *glsl_type;
union uniform_val v;
char *buffer_format;
// for UBO entries: these are all assumed to be arrays as far as updating
// is concerned. ("regular" values are treated like arrays of length 1)
size_t ubo_length; // number of array elements (or 0 if not using UBO)
size_t ubo_rowsize; // size of data in each array row
size_t ubo_stride; // stride of each array row
size_t ubo_offset; // byte offset within the uniform buffer
};
struct sc_cached_uniform {
union uniform_val v;
int index; // for ra_renderpass_input_val
};
struct sc_entry {
struct ra_renderpass *pass;
struct sc_cached_uniform *cached_uniforms;
int num_cached_uniforms;
bstr total;
struct timer_pool *timer;
struct ra_buf *ubo;
int ubo_index; // for ra_renderpass_input_val.index
};
struct gl_shader_cache {
struct ra *ra;
struct mp_log *log;
// permanent
char **exts;
int num_exts;
// this is modified during use (gl_sc_add() etc.) and reset for each shader
bstr prelude_text;
bstr header_text;
bstr text;
// Next binding point (texture unit, image unit, buffer binding, etc.)
// In OpenGL these are separate for each input type
int next_binding[RA_VARTYPE_COUNT];
struct ra_renderpass_params params;
struct sc_entry **entries;
int num_entries;
struct sc_entry *current_shader; // set by gl_sc_generate()
struct sc_uniform *uniforms;
int num_uniforms;
int ubo_binding;
size_t ubo_size;
struct ra_renderpass_input_val *values;
int num_values;
// For checking that the user is calling gl_sc_reset() properly.
bool needs_reset;
bool error_state; // true if an error occurred
// temporary buffers (avoids frequent reallocations)
bstr tmp[6];
// For the disk-cache.
char *cache_dir;
struct mpv_global *global; // can be NULL
};
static void gl_sc_reset(struct gl_shader_cache *sc);
struct gl_shader_cache *gl_sc_create(struct ra *ra, struct mpv_global *global,
struct mp_log *log)
{
struct gl_shader_cache *sc = talloc_ptrtype(NULL, sc);
*sc = (struct gl_shader_cache){
.ra = ra,
.global = global,
.log = log,
};
gl_sc_reset(sc);
return sc;
}
// Reset the previous pass. This must be called after gl_sc_generate and before
// starting a new shader.
static void gl_sc_reset(struct gl_shader_cache *sc)
{
sc->prelude_text.len = 0;
sc->header_text.len = 0;
sc->text.len = 0;
for (int n = 0; n < sc->num_uniforms; n++)
talloc_free((void *)sc->uniforms[n].input.name);
sc->num_uniforms = 0;
sc->ubo_binding = 0;
sc->ubo_size = 0;
for (int i = 0; i < RA_VARTYPE_COUNT; i++)
sc->next_binding[i] = 0;
sc->current_shader = NULL;
sc->params = (struct ra_renderpass_params){0};
sc->needs_reset = false;
}
static void sc_flush_cache(struct gl_shader_cache *sc)
{
MP_VERBOSE(sc, "flushing shader cache\n");
for (int n = 0; n < sc->num_entries; n++) {
struct sc_entry *e = sc->entries[n];
ra_buf_free(sc->ra, &e->ubo);
if (e->pass)
sc->ra->fns->renderpass_destroy(sc->ra, e->pass);
timer_pool_destroy(e->timer);
talloc_free(e);
}
sc->num_entries = 0;
}
void gl_sc_destroy(struct gl_shader_cache *sc)
{
if (!sc)
return;
gl_sc_reset(sc);
sc_flush_cache(sc);
talloc_free(sc);
}
bool gl_sc_error_state(struct gl_shader_cache *sc)
{
return sc->error_state;
}
void gl_sc_reset_error(struct gl_shader_cache *sc)
{
sc->error_state = false;
}
void gl_sc_enable_extension(struct gl_shader_cache *sc, char *name)
{
for (int n = 0; n < sc->num_exts; n++) {
if (strcmp(sc->exts[n], name) == 0)
return;
}
MP_TARRAY_APPEND(sc, sc->exts, sc->num_exts, talloc_strdup(sc, name));
}
#define bstr_xappend0(sc, b, s) bstr_xappend(sc, b, bstr0(s))
void gl_sc_add(struct gl_shader_cache *sc, const char *text)
{
bstr_xappend0(sc, &sc->text, text);
}
void gl_sc_addf(struct gl_shader_cache *sc, const char *textf, ...)
{
va_list ap;
va_start(ap, textf);
bstr_xappend_vasprintf(sc, &sc->text, textf, ap);
va_end(ap);
}
void gl_sc_hadd(struct gl_shader_cache *sc, const char *text)
{
bstr_xappend0(sc, &sc->header_text, text);
}
void gl_sc_haddf(struct gl_shader_cache *sc, const char *textf, ...)
{
va_list ap;
va_start(ap, textf);
bstr_xappend_vasprintf(sc, &sc->header_text, textf, ap);
va_end(ap);
}
void gl_sc_hadd_bstr(struct gl_shader_cache *sc, struct bstr text)
{
bstr_xappend(sc, &sc->header_text, text);
}
void gl_sc_paddf(struct gl_shader_cache *sc, const char *textf, ...)
{
va_list ap;
va_start(ap, textf);
bstr_xappend_vasprintf(sc, &sc->prelude_text, textf, ap);
va_end(ap);
}
static struct sc_uniform *find_uniform(struct gl_shader_cache *sc,
const char *name)
{
struct sc_uniform new = {
.input = {
.dim_v = 1,
.dim_m = 1,
},
};
for (int n = 0; n < sc->num_uniforms; n++) {
struct sc_uniform *u = &sc->uniforms[n];
if (strcmp(u->input.name, name) == 0) {
const char *allocname = u->input.name;
*u = new;
u->input.name = allocname;
return u;
}
}
// not found -> add it
new.input.name = talloc_strdup(NULL, name);
MP_TARRAY_APPEND(sc, sc->uniforms, sc->num_uniforms, new);
return &sc->uniforms[sc->num_uniforms - 1];
}
static int gl_sc_next_binding(struct gl_shader_cache *sc, enum ra_vartype type)
{
if (sc->ra->caps & RA_CAP_SHARED_BINDING) {
return sc->next_binding[type]++;
} else {
return sc->next_binding[0]++;
}
}
// Updates the UBO metadata for the given sc_uniform. Assumes type, dim_v and
// dim_m are already set. Computes the correct alignment, size and array stride
// as per the std140 specification.
static void update_ubo_params(struct gl_shader_cache *sc, struct sc_uniform *u)
{
if (!(sc->ra->caps & RA_CAP_BUF_RO))
return;
// Using UBOs with explicit layout(offset) like we do requires GLSL version
// 440 or higher. In theory the UBO code can also use older versions, but
// just try and avoid potential headaches. This also ensures they're only
// used on drivers that are probably modern enough to actually support them
// correctly.
if (sc->ra->glsl_version < 440)
return;
size_t el_size;
switch (u->input.type) {
case RA_VARTYPE_INT: el_size = sizeof(int); break;
case RA_VARTYPE_FLOAT: el_size = sizeof(float); break;
default: abort();
}
u->ubo_rowsize = el_size * u->input.dim_v;
// std140 packing rules:
// 1. The alignment of generic values is their size in bytes
// 2. The alignment of vectors is the vector length * the base count, with
// the exception of vec3 which is always aligned like vec4
// 3. The alignment of arrays is that of the element size rounded up to
// the nearest multiple of vec4
// 4. Matrices are treated like arrays of vectors
// 5. Arrays/matrices are laid out with a stride equal to the alignment
u->ubo_stride = u->ubo_rowsize;
if (u->input.dim_v == 3)
u->ubo_stride += el_size;
if (u->input.dim_m > 1)
u->ubo_stride = MP_ALIGN_UP(u->ubo_stride, sizeof(float[4]));
u->ubo_offset = MP_ALIGN_UP(sc->ubo_size, u->ubo_stride);
u->ubo_length = u->input.dim_m;
sc->ubo_size = u->ubo_offset + u->ubo_stride * u->ubo_length;
}
void gl_sc_uniform_texture(struct gl_shader_cache *sc, char *name,
struct ra_tex *tex)
{
const char *glsl_type = "sampler2D";
if (tex->params.dimensions == 1) {
glsl_type = "sampler1D";
} else if (tex->params.dimensions == 3) {
glsl_type = "sampler3D";
} else if (tex->params.non_normalized) {
glsl_type = "sampler2DRect";
} else if (tex->params.external_oes) {
glsl_type = "samplerExternalOES";
} else if (tex->params.format->ctype == RA_CTYPE_UINT) {
glsl_type = sc->ra->glsl_es ? "highp usampler2D" : "usampler2D";
}
struct sc_uniform *u = find_uniform(sc, name);
u->input.type = RA_VARTYPE_TEX;
u->glsl_type = glsl_type;
u->input.binding = gl_sc_next_binding(sc, u->input.type);
u->v.tex = tex;
}
void gl_sc_uniform_image2D_wo(struct gl_shader_cache *sc, const char *name,
struct ra_tex *tex)
{
gl_sc_enable_extension(sc, "GL_ARB_shader_image_load_store");
struct sc_uniform *u = find_uniform(sc, name);
u->input.type = RA_VARTYPE_IMG_W;
u->glsl_type = "writeonly image2D";
u->input.binding = gl_sc_next_binding(sc, u->input.type);
u->v.tex = tex;
}
void gl_sc_ssbo(struct gl_shader_cache *sc, char *name, struct ra_buf *buf,
char *format, ...)
{
assert(sc->ra->caps & RA_CAP_BUF_RW);
gl_sc_enable_extension(sc, "GL_ARB_shader_storage_buffer_object");
struct sc_uniform *u = find_uniform(sc, name);
u->input.type = RA_VARTYPE_BUF_RW;
u->glsl_type = "";
u->input.binding = gl_sc_next_binding(sc, u->input.type);
u->v.buf = buf;
va_list ap;
va_start(ap, format);
u->buffer_format = ta_vasprintf(sc, format, ap);
va_end(ap);
}
void gl_sc_uniform_f(struct gl_shader_cache *sc, char *name, float f)
{
struct sc_uniform *u = find_uniform(sc, name);
u->input.type = RA_VARTYPE_FLOAT;
u->glsl_type = "float";
update_ubo_params(sc, u);
u->v.f[0] = f;
}
void gl_sc_uniform_i(struct gl_shader_cache *sc, char *name, int i)
{
struct sc_uniform *u = find_uniform(sc, name);
u->input.type = RA_VARTYPE_INT;
u->glsl_type = "int";
update_ubo_params(sc, u);
u->v.i[0] = i;
}
void gl_sc_uniform_vec2(struct gl_shader_cache *sc, char *name, float f[2])
{
struct sc_uniform *u = find_uniform(sc, name);
u->input.type = RA_VARTYPE_FLOAT;
u->input.dim_v = 2;
u->glsl_type = "vec2";
update_ubo_params(sc, u);
u->v.f[0] = f[0];
u->v.f[1] = f[1];
}
void gl_sc_uniform_vec3(struct gl_shader_cache *sc, char *name, GLfloat f[3])
{
struct sc_uniform *u = find_uniform(sc, name);
u->input.type = RA_VARTYPE_FLOAT;
u->input.dim_v = 3;
u->glsl_type = "vec3";
update_ubo_params(sc, u);
u->v.f[0] = f[0];
u->v.f[1] = f[1];
u->v.f[2] = f[2];
}
static void transpose2x2(float r[2 * 2])
{
MPSWAP(float, r[0+2*1], r[1+2*0]);
}
void gl_sc_uniform_mat2(struct gl_shader_cache *sc, char *name,
bool transpose, GLfloat *v)
{
struct sc_uniform *u = find_uniform(sc, name);
u->input.type = RA_VARTYPE_FLOAT;
u->input.dim_v = 2;
u->input.dim_m = 2;
u->glsl_type = "mat2";
update_ubo_params(sc, u);
for (int n = 0; n < 4; n++)
u->v.f[n] = v[n];
if (transpose)
transpose2x2(&u->v.f[0]);
}
static void transpose3x3(float r[3 * 3])
{
MPSWAP(float, r[0+3*1], r[1+3*0]);
MPSWAP(float, r[0+3*2], r[2+3*0]);
MPSWAP(float, r[1+3*2], r[2+3*1]);
}
void gl_sc_uniform_mat3(struct gl_shader_cache *sc, char *name,
bool transpose, GLfloat *v)
{
struct sc_uniform *u = find_uniform(sc, name);
u->input.type = RA_VARTYPE_FLOAT;
u->input.dim_v = 3;
u->input.dim_m = 3;
u->glsl_type = "mat3";
update_ubo_params(sc, u);
for (int n = 0; n < 9; n++)
u->v.f[n] = v[n];
if (transpose)
transpose3x3(&u->v.f[0]);
}
// Tell the shader generator (and later gl_sc_draw_data()) about the vertex
// data layout and attribute names. The entries array is terminated with a {0}
// entry. The array memory must remain valid indefinitely (for now).
void gl_sc_set_vertex_format(struct gl_shader_cache *sc,
const struct ra_renderpass_input *entries,
int vertex_stride)
{
sc->params.vertex_attribs = (struct ra_renderpass_input *)entries;
sc->params.num_vertex_attribs = 0;
while (entries[sc->params.num_vertex_attribs].name)
sc->params.num_vertex_attribs++;
sc->params.vertex_stride = vertex_stride;
}
void gl_sc_blend(struct gl_shader_cache *sc,
enum ra_blend blend_src_rgb,
enum ra_blend blend_dst_rgb,
enum ra_blend blend_src_alpha,
enum ra_blend blend_dst_alpha)
{
sc->params.enable_blend = true;
sc->params.blend_src_rgb = blend_src_rgb;
sc->params.blend_dst_rgb = blend_dst_rgb;
sc->params.blend_src_alpha = blend_src_alpha;
sc->params.blend_dst_alpha = blend_dst_alpha;
}
static const char *vao_glsl_type(const struct ra_renderpass_input *e)
{
// pretty dumb... too dumb, but works for us
switch (e->dim_v) {
case 1: return "float";
case 2: return "vec2";
case 3: return "vec3";
case 4: return "vec4";
default: abort();
}
}
static void update_ubo(struct ra *ra, struct ra_buf *ubo, struct sc_uniform *u)
{
uintptr_t src = (uintptr_t) &u->v;
size_t dst = u->ubo_offset;
size_t src_stride = u->ubo_rowsize;
size_t dst_stride = u->ubo_stride;
for (int i = 0; i < u->ubo_length; i++) {
ra->fns->buf_update(ra, ubo, dst, (void *)src, src_stride);
src += src_stride;
dst += dst_stride;
}
}
static void update_uniform(struct gl_shader_cache *sc, struct sc_entry *e,
struct sc_uniform *u, int n)
{
struct sc_cached_uniform *un = &e->cached_uniforms[n];
struct ra_renderpass_input *input = &e->pass->params.inputs[n];
size_t size = ra_render_pass_input_data_size(input);
bool changed = true;
if (size > 0)
changed = memcmp(&un->v, &u->v, size) != 0;
if (changed) {
un->v = u->v;
if (u->ubo_length) {
assert(e->ubo);
update_ubo(sc->ra, e->ubo, u);
} else {
struct ra_renderpass_input_val value = {
.index = un->index,
.data = &un->v,
};
MP_TARRAY_APPEND(sc, sc->values, sc->num_values, value);
}
}
}
void gl_sc_set_cache_dir(struct gl_shader_cache *sc, const char *dir)
{
talloc_free(sc->cache_dir);
sc->cache_dir = talloc_strdup(sc, dir);
}
static bool create_pass(struct gl_shader_cache *sc, struct sc_entry *entry)
{
bool ret = false;
void *tmp = talloc_new(NULL);
struct ra_renderpass_params params = sc->params;
MP_VERBOSE(sc, "new shader program:\n");
if (sc->header_text.len) {
MP_VERBOSE(sc, "header:\n");
mp_log_source(sc->log, MSGL_V, sc->header_text.start);
MP_VERBOSE(sc, "body:\n");
}
if (sc->text.len)
mp_log_source(sc->log, MSGL_V, sc->text.start);
// The vertex shader uses mangled names for the vertex attributes, so that
// the fragment shader can use the "real" names. But the shader is expecting
// the vertex attribute names (at least with older GLSL targets for GL).
params.vertex_attribs = talloc_memdup(tmp, params.vertex_attribs,
params.num_vertex_attribs * sizeof(params.vertex_attribs[0]));
for (int n = 0; n < params.num_vertex_attribs; n++) {
struct ra_renderpass_input *attrib = &params.vertex_attribs[n];
attrib->name = talloc_asprintf(tmp, "vertex_%s", attrib->name);
}
const char *cache_header = "mpv shader cache v1\n";
char *cache_filename = NULL;
char *cache_dir = NULL;
if (sc->cache_dir && sc->cache_dir[0]) {
// Try to load it from a disk cache.
cache_dir = mp_get_user_path(tmp, sc->global, sc->cache_dir);
struct AVSHA *sha = av_sha_alloc();
if (!sha)
abort();
av_sha_init(sha, 256);
av_sha_update(sha, entry->total.start, entry->total.len);
uint8_t hash[256 / 8];
av_sha_final(sha, hash);
av_free(sha);
char hashstr[256 / 8 * 2 + 1];
for (int n = 0; n < 256 / 8; n++)
snprintf(hashstr + n * 2, sizeof(hashstr) - n * 2, "%02X", hash[n]);
cache_filename = mp_path_join(tmp, cache_dir, hashstr);
if (stat(cache_filename, &(struct stat){0}) == 0) {
MP_VERBOSE(sc, "Trying to load shader from disk...\n");
struct bstr cachedata =
stream_read_file(cache_filename, tmp, sc->global, 1000000000);
if (bstr_eatstart0(&cachedata, cache_header))
params.cached_program = cachedata;
}
}
// If using a UBO, also make sure to add it as an input value so the RA
// can see it
if (sc->ubo_size) {
entry->ubo_index = sc->params.num_inputs;
struct ra_renderpass_input ubo_input = {
.name = "UBO",
.type = RA_VARTYPE_BUF_RO,
.dim_v = 1,
.dim_m = 1,
.binding = sc->ubo_binding,
};
MP_TARRAY_APPEND(sc, params.inputs, params.num_inputs, ubo_input);
}
entry->pass = sc->ra->fns->renderpass_create(sc->ra, &params);
if (!entry->pass)
goto error;
if (sc->ubo_size) {
struct ra_buf_params ubo_params = {
.type = RA_BUF_TYPE_UNIFORM,
.size = sc->ubo_size,
.host_mutable = true,
};
entry->ubo = ra_buf_create(sc->ra, &ubo_params);
if (!entry->ubo) {
MP_ERR(sc, "Failed creating uniform buffer!\n");
goto error;
}
}
if (entry->pass && cache_filename) {
bstr nc = entry->pass->params.cached_program;
if (nc.len && !bstr_equals(params.cached_program, nc)) {
mp_mkdirp(cache_dir);
MP_VERBOSE(sc, "Writing shader cache file: %s\n", cache_filename);
FILE *out = fopen(cache_filename, "wb");
if (out) {
fwrite(cache_header, strlen(cache_header), 1, out);
fwrite(nc.start, nc.len, 1, out);
fclose(out);
}
}
}
ret = true;
error:
talloc_free(tmp);
return ret;
}
#define ADD(x, ...) bstr_xappend_asprintf(sc, (x), __VA_ARGS__)
#define ADD_BSTR(x, s) bstr_xappend(sc, (x), (s))
static void add_uniforms(struct gl_shader_cache *sc, bstr *dst)
{
// Add all of the UBO entries separately as members of their own buffer
if (sc->ubo_size > 0) {
ADD(dst, "layout(std140, binding=%d) uniform UBO {\n", sc->ubo_binding);
for (int n = 0; n < sc->num_uniforms; n++) {
struct sc_uniform *u = &sc->uniforms[n];
if (!u->ubo_length)
continue;
ADD(dst, "layout(offset=%zu) %s %s;\n", u->ubo_offset,
u->glsl_type, u->input.name);
}
ADD(dst, "};\n");
}
for (int n = 0; n < sc->num_uniforms; n++) {
struct sc_uniform *u = &sc->uniforms[n];
if (u->ubo_length)
continue;
switch (u->input.type) {
case RA_VARTYPE_INT:
case RA_VARTYPE_FLOAT:
assert(sc->ra->caps & RA_CAP_GLOBAL_UNIFORM);
// fall through
case RA_VARTYPE_TEX:
case RA_VARTYPE_IMG_W:
ADD(dst, "uniform %s %s;\n", u->glsl_type, u->input.name);
break;
case RA_VARTYPE_BUF_RO:
ADD(dst, "layout(std140, binding=%d) uniform %s { %s };\n",
u->input.binding, u->input.name, u->buffer_format);
break;
case RA_VARTYPE_BUF_RW:
ADD(dst, "layout(std430, binding=%d) buffer %s { %s };\n",
u->input.binding, u->input.name, u->buffer_format);
break;
default: abort();
}
}
}
// 1. Generate vertex and fragment shaders from the fragment shader text added
// with gl_sc_add(). The generated shader program is cached (based on the
// text), so actual compilation happens only the first time.
// 2. Update the uniforms and textures set with gl_sc_uniform_*.
// 3. Make the new shader program current (glUseProgram()).
// After that, you render, and then you call gc_sc_reset(), which does:
// 1. Unbind the program and all textures.
// 2. Reset the sc state and prepare for a new shader program. (All uniforms
// and fragment operations needed for the next program have to be re-added.)
static void gl_sc_generate(struct gl_shader_cache *sc, enum ra_renderpass_type type)
{
int glsl_version = sc->ra->glsl_version;
int glsl_es = sc->ra->glsl_es ? glsl_version : 0;
sc->params.type = type;
// gl_sc_reset() must be called after ending the previous render process,
// and before starting a new one.
assert(!sc->needs_reset);
sc->needs_reset = true;
// gl_sc_set_vertex_format() must always be called
assert(sc->params.vertex_attribs);
// If using a UBO, pick a binding (needed for shader generation)
if (sc->ubo_size)
sc->ubo_binding = gl_sc_next_binding(sc, RA_VARTYPE_BUF_RO);
for (int n = 0; n < MP_ARRAY_SIZE(sc->tmp); n++)
sc->tmp[n].len = 0;
// set up shader text (header + uniforms + body)
bstr *header = &sc->tmp[0];
ADD(header, "#version %d%s\n", glsl_version, glsl_es >= 300 ? " es" : "");
if (type == RA_RENDERPASS_TYPE_COMPUTE) {
// This extension cannot be enabled in fragment shader. Enable it as
// an exception for compute shader.
ADD(header, "#extension GL_ARB_compute_shader : enable\n");
}
for (int n = 0; n < sc->num_exts; n++)
ADD(header, "#extension %s : enable\n", sc->exts[n]);
if (glsl_es) {
ADD(header, "precision mediump float;\n");
ADD(header, "precision mediump sampler2D;\n");
if (sc->ra->caps & RA_CAP_TEX_3D)
ADD(header, "precision mediump sampler3D;\n");
}
if (glsl_version >= 130) {
ADD(header, "#define texture1D texture\n");
ADD(header, "#define texture3D texture\n");
} else {
ADD(header, "#define texture texture2D\n");
}
// Additional helpers.
ADD(header, "#define LUT_POS(x, lut_size)"
" mix(0.5 / (lut_size), 1.0 - 0.5 / (lut_size), (x))\n");
char *vert_in = glsl_version >= 130 ? "in" : "attribute";
char *vert_out = glsl_version >= 130 ? "out" : "varying";
char *frag_in = glsl_version >= 130 ? "in" : "varying";
struct bstr *vert = NULL, *frag = NULL, *comp = NULL;
if (type == RA_RENDERPASS_TYPE_RASTER) {
// vertex shader: we don't use the vertex shader, so just setup a
// dummy, which passes through the vertex array attributes.
bstr *vert_head = &sc->tmp[1];
ADD_BSTR(vert_head, *header);
bstr *vert_body = &sc->tmp[2];
ADD(vert_body, "void main() {\n");
bstr *frag_vaos = &sc->tmp[3];
for (int n = 0; n < sc->params.num_vertex_attribs; n++) {
const struct ra_renderpass_input *e = &sc->params.vertex_attribs[n];
const char *glsl_type = vao_glsl_type(e);
if (strcmp(e->name, "position") == 0) {
// setting raster pos. requires setting gl_Position magic variable
assert(e->dim_v == 2 && e->type == RA_VARTYPE_FLOAT);
ADD(vert_head, "%s vec2 vertex_position;\n", vert_in);
ADD(vert_body, "gl_Position = vec4(vertex_position, 1.0, 1.0);\n");
} else {
ADD(vert_head, "%s %s vertex_%s;\n", vert_in, glsl_type, e->name);
ADD(vert_head, "%s %s %s;\n", vert_out, glsl_type, e->name);
ADD(vert_body, "%s = vertex_%s;\n", e->name, e->name);
ADD(frag_vaos, "%s %s %s;\n", frag_in, glsl_type, e->name);
}
}
ADD(vert_body, "}\n");
vert = vert_head;
ADD_BSTR(vert, *vert_body);
// fragment shader; still requires adding used uniforms and VAO elements
frag = &sc->tmp[4];
ADD_BSTR(frag, *header);
if (glsl_version >= 130)
ADD(frag, "out vec4 out_color;\n");
ADD_BSTR(frag, *frag_vaos);
add_uniforms(sc, frag);
ADD_BSTR(frag, sc->prelude_text);
ADD_BSTR(frag, sc->header_text);
ADD(frag, "void main() {\n");
// we require _all_ frag shaders to write to a "vec4 color"
ADD(frag, "vec4 color = vec4(0.0, 0.0, 0.0, 1.0);\n");
ADD_BSTR(frag, sc->text);
if (glsl_version >= 130) {
ADD(frag, "out_color = color;\n");
} else {
ADD(frag, "gl_FragColor = color;\n");
}
ADD(frag, "}\n");
}
if (type == RA_RENDERPASS_TYPE_COMPUTE) {
comp = &sc->tmp[4];
ADD_BSTR(comp, *header);
add_uniforms(sc, comp);
ADD_BSTR(comp, sc->prelude_text);
ADD_BSTR(comp, sc->header_text);
ADD(comp, "void main() {\n");
ADD(comp, "vec4 color = vec4(0.0, 0.0, 0.0, 1.0);\n"); // convenience
ADD_BSTR(comp, sc->text);
ADD(comp, "}\n");
}
bstr *hash_total = &sc->tmp[5];
ADD(hash_total, "type %d\n", sc->params.type);
if (frag) {
ADD_BSTR(hash_total, *frag);
sc->params.frag_shader = frag->start;
}
ADD(hash_total, "\n");
if (vert) {
ADD_BSTR(hash_total, *vert);
sc->params.vertex_shader = vert->start;
}
ADD(hash_total, "\n");
if (comp) {
ADD_BSTR(hash_total, *comp);
sc->params.compute_shader = comp->start;
}
ADD(hash_total, "\n");
if (sc->params.enable_blend) {
ADD(hash_total, "blend %d %d %d %d\n",
sc->params.blend_src_rgb, sc->params.blend_dst_rgb,
sc->params.blend_src_alpha, sc->params.blend_dst_alpha);
}
struct sc_entry *entry = NULL;
for (int n = 0; n < sc->num_entries; n++) {
struct sc_entry *cur = sc->entries[n];
if (bstr_equals(cur->total, *hash_total)) {
entry = cur;
break;
}
}
if (!entry) {
if (sc->num_entries == SC_MAX_ENTRIES)
sc_flush_cache(sc);
entry = talloc_ptrtype(NULL, entry);
*entry = (struct sc_entry){
.total = bstrdup(entry, *hash_total),
.timer = timer_pool_create(sc->ra),
};
for (int n = 0; n < sc->num_uniforms; n++) {
struct sc_cached_uniform u = {0};
if (!sc->uniforms[n].ubo_length) {
u.index = sc->params.num_inputs;
MP_TARRAY_APPEND(sc, sc->params.inputs, sc->params.num_inputs,
sc->uniforms[n].input);
}
MP_TARRAY_APPEND(entry, entry->cached_uniforms,
entry->num_cached_uniforms, u);
}
if (!create_pass(sc, entry))
sc->error_state = true;
MP_TARRAY_APPEND(sc, sc->entries, sc->num_entries, entry);
}
if (sc->error_state)
return;
assert(sc->num_uniforms == entry->num_cached_uniforms);
sc->num_values = 0;
for (int n = 0; n < sc->num_uniforms; n++)
update_uniform(sc, entry, &sc->uniforms[n], n);
// If we're using a UBO, make sure to bind it as well
if (sc->ubo_size) {
struct ra_renderpass_input_val ubo_val = {
.index = entry->ubo_index,
.data = &entry->ubo,
};
MP_TARRAY_APPEND(sc, sc->values, sc->num_values, ubo_val);
}
sc->current_shader = entry;
}
struct mp_pass_perf gl_sc_dispatch_draw(struct gl_shader_cache *sc,
struct ra_tex *target,
void *ptr, size_t num)
{
struct timer_pool *timer = NULL;
gl_sc_generate(sc, RA_RENDERPASS_TYPE_RASTER);
if (!sc->current_shader)
goto error;
timer = sc->current_shader->timer;
struct mp_rect full_rc = {0, 0, target->params.w, target->params.h};
struct ra_renderpass_run_params run = {
.pass = sc->current_shader->pass,
.values = sc->values,
.num_values = sc->num_values,
.target = target,
.vertex_data = ptr,
.vertex_count = num,
.viewport = full_rc,
.scissors = full_rc,
};
timer_pool_start(timer);
sc->ra->fns->renderpass_run(sc->ra, &run);
timer_pool_stop(timer);
error:
gl_sc_reset(sc);
return timer_pool_measure(timer);
}
struct mp_pass_perf gl_sc_dispatch_compute(struct gl_shader_cache *sc,
int w, int h, int d)
{
struct timer_pool *timer = NULL;
gl_sc_generate(sc, RA_RENDERPASS_TYPE_COMPUTE);
if (!sc->current_shader)
goto error;
timer = sc->current_shader->timer;
struct ra_renderpass_run_params run = {
.pass = sc->current_shader->pass,
.values = sc->values,
.num_values = sc->num_values,
.compute_groups = {w, h, d},
};
timer_pool_start(timer);
sc->ra->fns->renderpass_run(sc->ra, &run);
timer_pool_stop(timer);
error:
gl_sc_reset(sc);
return timer_pool_measure(timer);
}
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