RepoMirrors
/
mpv
mirror of https://github.com/mpv-player/mpv
1
0
Fork 0
Code Issues Releases Wiki Activity
mpv/video/out/gl_osd.c

373 lines
12 KiB
C
Raw Blame History

/*
* This file is part of mplayer.
*
* mplayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mplayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mplayer. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <assert.h>
#include <libavutil/common.h>
#include "bitmap_packer.h"
#include "gl_osd.h"
struct osd_fmt_entry {
GLint internal_format;
GLint format;
GLenum type;
};
// glBlendFunc() arguments
static const int blend_factors[SUBBITMAP_COUNT][2] = {
[SUBBITMAP_LIBASS] = {GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA},
[SUBBITMAP_RGBA] = {GL_ONE, GL_ONE_MINUS_SRC_ALPHA},
};
static const struct osd_fmt_entry osd_to_gl3_formats[SUBBITMAP_COUNT] = {
[SUBBITMAP_LIBASS] = {GL_RED, GL_RED, GL_UNSIGNED_BYTE},
[SUBBITMAP_RGBA] = {GL_RGBA, GL_BGRA, GL_UNSIGNED_BYTE},
};
static const struct osd_fmt_entry osd_to_gl_legacy_formats[SUBBITMAP_COUNT] = {
[SUBBITMAP_LIBASS] = {GL_ALPHA, GL_ALPHA, GL_UNSIGNED_BYTE},
[SUBBITMAP_RGBA] = {GL_RGBA, GL_BGRA, GL_UNSIGNED_BYTE},
};
struct mpgl_osd *mpgl_osd_init(GL *gl, bool legacy)
{
GLint max_texture_size;
gl->GetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size);
struct mpgl_osd *ctx = talloc_ptrtype(NULL, ctx);
*ctx = (struct mpgl_osd) {
.gl = gl,
.fmt_table = legacy ? osd_to_gl_legacy_formats : osd_to_gl3_formats,
.scratch = talloc_zero_size(ctx, 1),
};
for (int n = 0; n < MAX_OSD_PARTS; n++) {
struct mpgl_osd_part *p = talloc_ptrtype(ctx, p);
*p = (struct mpgl_osd_part) {
.packer = talloc_struct(p, struct bitmap_packer, {
.w_max = max_texture_size,
.h_max = max_texture_size,
}),
};
ctx->parts[n] = p;
}
for (int n = 0; n < SUBBITMAP_COUNT; n++)
ctx->formats[n] = ctx->fmt_table[n].type != 0;
return ctx;
}
void mpgl_osd_destroy(struct mpgl_osd *ctx)
{
GL *gl = ctx->gl;
for (int n = 0; n < MAX_OSD_PARTS; n++) {
struct mpgl_osd_part *p = ctx->parts[n];
gl->DeleteTextures(1, &p->texture);
if (gl->DeleteBuffers)
gl->DeleteBuffers(1, &p->buffer);
}
talloc_free(ctx);
}
static bool upload_pbo(struct mpgl_osd *ctx, struct mpgl_osd_part *osd,
struct sub_bitmaps *imgs)
{
GL *gl = ctx->gl;
bool success = true;
struct osd_fmt_entry fmt = ctx->fmt_table[imgs->format];
int pix_stride = glFmt2bpp(fmt.format, fmt.type);
if (!osd->buffer) {
gl->GenBuffers(1, &osd->buffer);
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, osd->buffer);
gl->BufferData(GL_PIXEL_UNPACK_BUFFER, osd->w * osd->h * pix_stride,
NULL, GL_DYNAMIC_COPY);
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
}
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, osd->buffer);
char *data = gl->MapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);
if (!data) {
success = false;
} else {
struct pos bb[2];
packer_get_bb(osd->packer, bb);
size_t stride = osd->w * pix_stride;
packer_copy_subbitmaps(osd->packer, imgs, data, pix_stride, stride);
if (!gl->UnmapBuffer(GL_PIXEL_UNPACK_BUFFER))
success = false;
glUploadTex(gl, GL_TEXTURE_2D, fmt.format, fmt.type, NULL, stride,
bb[0].x, bb[0].y, bb[1].x - bb[0].x, bb[1].y - bb[0].y,
0);
}
gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
if (!success) {
mp_msg(MSGT_VO, MSGL_FATAL, "[gl] Error: can't upload subtitles! "
"Remove the 'pbo' suboption.\n");
}
return success;
}
static void upload_tex(struct mpgl_osd *ctx, struct mpgl_osd_part *osd,
struct sub_bitmaps *imgs)
{
struct osd_fmt_entry fmt = ctx->fmt_table[imgs->format];
if (osd->packer->padding) {
struct pos bb[2];
packer_get_bb(osd->packer, bb);
glClearTex(ctx->gl, GL_TEXTURE_2D, fmt.format, fmt.type,
bb[0].x, bb[0].y, bb[1].x - bb[0].y, bb[1].y - bb[0].y,
0, &ctx->scratch);
}
for (int n = 0; n < osd->packer->count; n++) {
struct sub_bitmap *s = &imgs->parts[n];
struct pos p = osd->packer->result[n];
glUploadTex(ctx->gl, GL_TEXTURE_2D, fmt.format, fmt.type,
s->bitmap, s->stride, p.x, p.y, s->w, s->h, 0);
}
}
static bool upload_osd(struct mpgl_osd *ctx, struct mpgl_osd_part *osd,
struct sub_bitmaps *imgs)
{
GL *gl = ctx->gl;
// assume 2x2 filter on scaling
osd->packer->padding = ctx->scaled || imgs->scaled;
int r = packer_pack_from_subbitmaps(osd->packer, imgs);
if (r < 0) {
mp_msg(MSGT_VO, MSGL_ERR, "[gl] OSD bitmaps do not fit on "
"a surface with the maximum supported size %dx%d.\n",
osd->packer->w_max, osd->packer->h_max);
return false;
}
struct osd_fmt_entry fmt = ctx->fmt_table[imgs->format];
assert(fmt.type != 0);
if (!osd->texture)
gl->GenTextures(1, &osd->texture);
gl->BindTexture(GL_TEXTURE_2D, osd->texture);
if (osd->packer->w > osd->w || osd->packer->h > osd->h
|| osd->format != imgs->format)
{
osd->format = imgs->format;
osd->w = FFMAX(32, osd->packer->w);
osd->h = FFMAX(32, osd->packer->h);
gl->TexImage2D(GL_TEXTURE_2D, 0, fmt.internal_format, osd->w, osd->h,
0, fmt.format, fmt.type, NULL);
gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
if (gl->DeleteBuffers)
gl->DeleteBuffers(1, &osd->buffer);
osd->buffer = 0;
}
bool uploaded = false;
if (ctx->use_pbo)
uploaded = upload_pbo(ctx, osd, imgs);
if (!uploaded)
upload_tex(ctx, osd, imgs);
gl->BindTexture(GL_TEXTURE_2D, 0);
return true;
}
static struct mpgl_osd_part *osd_generate(struct mpgl_osd *ctx,
struct sub_bitmaps *imgs)
{
if (imgs->num_parts == 0 || !ctx->formats[imgs->format])
return NULL;
struct mpgl_osd_part *osd = ctx->parts[imgs->render_index];
if (imgs->bitmap_pos_id != osd->bitmap_pos_id) {
if (imgs->bitmap_id != osd->bitmap_id) {
if (!upload_osd(ctx, osd, imgs))
osd->packer->count = 0;
}
osd->bitmap_id = imgs->bitmap_id;
osd->bitmap_pos_id = imgs->bitmap_pos_id;
osd->num_vertices = 0;
}
return osd->packer->count ? osd : NULL;
}
void mpgl_osd_set_gl_state(struct mpgl_osd *ctx, struct mpgl_osd_part *p)
{
GL *gl = ctx->gl;
gl->BindTexture(GL_TEXTURE_2D, p->texture);
gl->Enable(GL_BLEND);
gl->BlendFunc(blend_factors[p->format][0], blend_factors[p->format][1]);
}
void mpgl_osd_unset_gl_state(struct mpgl_osd *ctx, struct mpgl_osd_part *p)
{
GL *gl = ctx->gl;
gl->Disable(GL_BLEND);
gl->BindTexture(GL_TEXTURE_2D, 0);
}
static void reset(struct mpgl_osd *ctx)
{
for (int n = 0; n < MAX_OSD_PARTS; n++) {
struct mpgl_osd_part *p = ctx->parts[n];
p->active = false;
}
}
struct draw_cb_closure {
struct mpgl_osd *ctx;
void (*cb)(void *ctx, struct mpgl_osd_part *part, struct sub_bitmaps *imgs);
void *cb_ctx;
};
static void draw_cb(void *pctx, struct sub_bitmaps *imgs)
{
struct draw_cb_closure *c = pctx;
struct mpgl_osd_part *part = osd_generate(c->ctx, imgs);
if (!part)
return;
part->active = true;
c->cb(c->cb_ctx, part, imgs);
}
void mpgl_osd_draw_cb(struct mpgl_osd *ctx,
struct osd_state *osd,
struct mp_osd_res res,
void (*cb)(void *ctx, struct mpgl_osd_part *part,
struct sub_bitmaps *imgs),
void *cb_ctx)
{
struct draw_cb_closure c = {ctx, cb, cb_ctx};
reset(ctx);
osd_draw(osd, res, osd->vo_pts, 0, ctx->formats, draw_cb, &c);
}
void mpgl_osd_redraw_cb(struct mpgl_osd *ctx,
void (*cb)(void *ctx, struct mpgl_osd_part *part,
struct sub_bitmaps *imgs),
void *cb_ctx)
{
for (int n = 0; n < MAX_OSD_PARTS; n++) {
struct mpgl_osd_part *p = ctx->parts[n];
if (p->active)
cb(cb_ctx, p, NULL);
}
}
struct vertex {
float position[2];
uint8_t color[4];
float texcoord[2];
};
static void draw_legacy_cb(void *pctx, struct sub_bitmaps *imgs)
{
struct mpgl_osd *ctx = pctx;
struct mpgl_osd_part *osd = osd_generate(ctx, imgs);
if (!osd)
return;
if (!osd->num_vertices) {
// 2 triangles primitives per quad = 6 vertices per quad
// not using GL_QUADS, as it is deprecated in OpenGL 3.x and later
osd->vertices = talloc_realloc(osd, osd->vertices, struct vertex,
osd->packer->count * 6);
struct vertex *va = osd->vertices;
float tex_w = osd->w;
float tex_h = osd->h;
for (int n = 0; n < osd->packer->count; n++) {
struct sub_bitmap *b = &imgs->parts[n];
struct pos p = osd->packer->result[n];
uint32_t c = imgs->format == SUBBITMAP_LIBASS
? b->libass.color : 0xFFFFFF00;
uint8_t color[4] = { c >> 24, (c >> 16) & 0xff,
(c >> 8) & 0xff, 255 - (c & 0xff) };
float x0 = b->x;
float y0 = b->y;
float x1 = b->x + b->dw;
float y1 = b->y + b->dh;
float tx0 = p.x / tex_w;
float ty0 = p.y / tex_h;
float tx1 = (p.x + b->w) / tex_w;
float ty1 = (p.y + b->h) / tex_h;
#define COLOR_INIT {color[0], color[1], color[2], color[3]}
struct vertex *v = &va[osd->num_vertices];
v[0] = (struct vertex) { {x0, y0}, COLOR_INIT, {tx0, ty0} };
v[1] = (struct vertex) { {x0, y1}, COLOR_INIT, {tx0, ty1} };
v[2] = (struct vertex) { {x1, y0}, COLOR_INIT, {tx1, ty0} };
v[3] = (struct vertex) { {x1, y1}, COLOR_INIT, {tx1, ty1} };
v[4] = v[2];
v[5] = v[1];
#undef COLOR_INIT
osd->num_vertices += 6;
}
}
GL *gl = ctx->gl;
struct vertex *va = osd->vertices;
size_t stride = sizeof(va[0]);
gl->VertexPointer(2, GL_FLOAT, stride, &va[0].position[0]);
gl->ColorPointer(4, GL_UNSIGNED_BYTE, stride, &va[0].color[0]);
gl->TexCoordPointer(2, GL_FLOAT, stride, &va[0].texcoord[0]);
gl->EnableClientState(GL_VERTEX_ARRAY);
gl->EnableClientState(GL_TEXTURE_COORD_ARRAY);
gl->EnableClientState(GL_COLOR_ARRAY);
mpgl_osd_set_gl_state(ctx, osd);
gl->DrawArrays(GL_TRIANGLES, 0, osd->num_vertices);
mpgl_osd_unset_gl_state(ctx, osd);
gl->DisableClientState(GL_VERTEX_ARRAY);
gl->DisableClientState(GL_TEXTURE_COORD_ARRAY);
gl->DisableClientState(GL_COLOR_ARRAY);
}
void mpgl_osd_draw_legacy(struct mpgl_osd *ctx, struct osd_state *osd,
struct mp_osd_res res)
{
osd_draw(osd, res, osd->vo_pts, 0, ctx->formats, draw_legacy_cb, ctx);
}
Reference in New Issue View Git Blame Copy Permalink