void GETextureGroup::release_all_texture()
{
for (int i=0; i<(int)texture_list_.size(); ++i)
{
release_texture(i);
}
texture_list_.clear();
}
void release_gl(graphics_context_t *gc)
{
release_texture(gc->texture);
release_shader(gc);
release_vbo(GL_ARRAY_BUFFER, gc->vbo_pos);
release_vbo(GL_ARRAY_BUFFER, gc->vbo_nor);
release_vbo(GL_ARRAY_BUFFER, gc->vbo_tex);
release_vbo(GL_ELEMENT_ARRAY_BUFFER, gc->vbo_ind);
}
int GlslManager::render_frame_rgba(mlt_service service, mlt_frame frame, int width, int height, uint8_t **image)
{
EffectChain* chain = get_chain( service );
if (!chain) return 1;
glsl_fbo fbo = get_fbo( width, height );
if (!fbo) return 1;
glsl_texture texture = get_texture( width, height, GL_RGBA );
if (!texture) {
release_fbo( fbo );
return 1;
}
// Use a PBO to hold the data we read back with glReadPixels().
// (Intel/DRI goes into a slow path if we don't read to PBO.)
int img_size = width * height * 4;
glsl_pbo pbo = get_pbo( img_size );
if (!pbo) {
release_fbo( fbo );
release_texture(texture);
return 1;
}
// Set the FBO
check_error();
glBindFramebuffer( GL_FRAMEBUFFER, fbo->fbo );
check_error();
glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture->texture, 0 );
check_error();
glBindFramebuffer( GL_FRAMEBUFFER, 0 );
check_error();
render_fbo( service, chain, fbo->fbo, width, height );
// Read FBO into PBO
glBindFramebuffer( GL_FRAMEBUFFER, fbo->fbo );
check_error();
glBindBuffer( GL_PIXEL_PACK_BUFFER_ARB, pbo->pbo );
check_error();
glBufferData( GL_PIXEL_PACK_BUFFER_ARB, img_size, NULL, GL_STREAM_READ );
check_error();
glReadPixels( 0, 0, width, height, GL_BGRA, GL_UNSIGNED_BYTE, BUFFER_OFFSET(0) );
check_error();
// Copy from PBO
uint8_t* buf = (uint8_t*) glMapBuffer( GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY );
check_error();
*image = (uint8_t*) mlt_pool_alloc( img_size );
mlt_frame_set_image( frame, *image, img_size, mlt_pool_release );
memcpy( *image, buf, img_size );
// Convert BGRA to RGBA
register uint8_t *p = *image;
register int n = width * height + 1;
while ( --n ) {
uint8_t b = p[0];
*p = p[2]; p += 2;
*p = b; p += 2;
}
// Release PBO and FBO
glUnmapBuffer( GL_PIXEL_PACK_BUFFER_ARB );
check_error();
glBindBuffer( GL_PIXEL_PACK_BUFFER_ARB, 0 );
check_error();
glBindFramebuffer( GL_FRAMEBUFFER, 0 );
check_error();
glBindTexture( GL_TEXTURE_2D, 0 );
check_error();
mlt_properties_set_data( MLT_FRAME_PROPERTIES(frame), "movit.convert.texture", texture, 0,
(mlt_destructor) GlslManager::release_texture, NULL);
release_fbo( fbo );
return 0;
}
