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Revert "libobs-opengl: Use PBO in device_stage_texture on macOS"

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This reverts commit 76f7a0c1c0.

Unfortunately, the performance issue is still present with PBOs even on
Monterey. During the 27.2 beta, macOS users even on Monterey have been
reporting a performance regression, and when the profiler data for those
users was looked at, major performance loss was noted in the
stage_output_texture function. This commit was the only probable cause.
This commit is contained in:
jp9000
2022-01-01 18:38:33 -08:00
parent a324584c20
commit 9bd9513e94
1 changed files with 54 additions and 0 deletions
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54
libobs-opengl/gl-stagesurf.c
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@@ -107,6 +107,58 @@ static bool can_stage(struct gs_stage_surface *dst, struct gs_texture_2d *src)
return true;
}
#ifdef __APPLE__
/* Apparently for mac, PBOs won't do an asynchronous transfer unless you use
* FBOs along with glReadPixels, which is really dumb. */
void device_stage_texture(gs_device_t *device, gs_stagesurf_t *dst,
gs_texture_t *src)
{
struct gs_texture_2d *tex2d = (struct gs_texture_2d *)src;
struct fbo_info *fbo;
GLint last_fbo;
bool success = false;
if (!can_stage(dst, tex2d))
goto failed;
if (!gl_bind_buffer(GL_PIXEL_PACK_BUFFER, dst->pack_buffer))
goto failed;
fbo = get_fbo(src, dst->width, dst->height);
if (!gl_get_integer_v(GL_READ_FRAMEBUFFER_BINDING, &last_fbo))
goto failed_unbind_buffer;
if (!gl_bind_framebuffer(GL_READ_FRAMEBUFFER, fbo->fbo))
goto failed_unbind_buffer;
glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + 0,
src->gl_target, src->texture, 0);
if (!gl_success("glFrameBufferTexture2D"))
goto failed_unbind_all;
glReadPixels(0, 0, dst->width, dst->height, dst->gl_format,
dst->gl_type, 0);
if (!gl_success("glReadPixels"))
goto failed_unbind_all;
success = true;
failed_unbind_all:
gl_bind_framebuffer(GL_READ_FRAMEBUFFER, last_fbo);
failed_unbind_buffer:
gl_bind_buffer(GL_PIXEL_PACK_BUFFER, 0);
failed:
if (!success)
blog(LOG_ERROR, "device_stage_texture (GL) failed");
UNUSED_PARAMETER(device);
}
#else
void device_stage_texture(gs_device_t *device, gs_stagesurf_t *dst,
gs_texture_t *src)
{
@@ -135,6 +187,8 @@ failed:
UNUSED_PARAMETER(device);
}
#endif
uint32_t gs_stagesurface_get_width(const gs_stagesurf_t *stagesurf)
{
return stagesurf->width;