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