/**
* \brief Query DRI2 to obtain a DRIdrawable's buffers.
*
* To determine which DRI buffers to request, examine the renderbuffers
* attached to the drawable's framebuffer. Then request the buffers with
* DRI2GetBuffers() or DRI2GetBuffersWithFormat().
*
* This is called from intel_update_renderbuffers().
*
* \param drawable Drawable whose buffers are queried.
* \param buffers [out] List of buffers returned by DRI2 query.
* \param buffer_count [out] Number of buffers returned.
*
* \see intel_update_renderbuffers()
* \see DRI2GetBuffers()
* \see DRI2GetBuffersWithFormat()
*/
static void
intel_query_dri2_buffers(struct brw_context *brw,
__DRIdrawable *drawable,
__DRIbuffer **buffers,
int *buffer_count)
{
__DRIscreen *screen = brw->intelScreen->driScrnPriv;
struct gl_framebuffer *fb = drawable->driverPrivate;
int i = 0;
unsigned attachments[8];
struct intel_renderbuffer *front_rb;
struct intel_renderbuffer *back_rb;
front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
memset(attachments, 0, sizeof(attachments));
if ((brw_is_front_buffer_drawing(fb) ||
brw_is_front_buffer_reading(fb) ||
!back_rb) && front_rb) {
/* If a fake front buffer is in use, then querying for
* __DRI_BUFFER_FRONT_LEFT will cause the server to copy the image from
* the real front buffer to the fake front buffer. So before doing the
* query, we need to make sure all the pending drawing has landed in the
* real front buffer.
*/
intel_batchbuffer_flush(brw);
intel_flush_front(&brw->ctx);
attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
attachments[i++] = intel_bits_per_pixel(front_rb);
} else if (front_rb && brw->front_buffer_dirty) {
/* We have pending front buffer rendering, but we aren't querying for a
* front buffer. If the front buffer we have is a fake front buffer,
* the X server is going to throw it away when it processes the query.
* So before doing the query, make sure all the pending drawing has
* landed in the real front buffer.
*/
intel_batchbuffer_flush(brw);
intel_flush_front(&brw->ctx);
}
if (back_rb) {
attachments[i++] = __DRI_BUFFER_BACK_LEFT;
attachments[i++] = intel_bits_per_pixel(back_rb);
}
assert(i <= ARRAY_SIZE(attachments));
*buffers = screen->dri2.loader->getBuffersWithFormat(drawable,
&drawable->w,
&drawable->h,
attachments, i / 2,
buffer_count,
drawable->loaderPrivate);
}
static void
intel_glFlush(struct gl_context *ctx)
{
struct brw_context *brw = brw_context(ctx);
intel_batchbuffer_flush(brw);
intel_flush_front(ctx);
if (brw_is_front_buffer_drawing(ctx->DrawBuffer))
brw->need_throttle = true;
}
static void
intel_update_image_buffers(struct brw_context *brw, __DRIdrawable *drawable)
{
struct gl_framebuffer *fb = drawable->driverPrivate;
__DRIscreen *screen = brw->intelScreen->driScrnPriv;
struct intel_renderbuffer *front_rb;
struct intel_renderbuffer *back_rb;
struct __DRIimageList images;
unsigned int format;
uint32_t buffer_mask = 0;
front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
if (back_rb)
format = intel_rb_format(back_rb);
else if (front_rb)
format = intel_rb_format(front_rb);
else
return;
if (front_rb && (brw_is_front_buffer_drawing(fb) ||
brw_is_front_buffer_reading(fb) || !back_rb)) {
buffer_mask |= __DRI_IMAGE_BUFFER_FRONT;
}
if (back_rb)
buffer_mask |= __DRI_IMAGE_BUFFER_BACK;
(*screen->image.loader->getBuffers) (drawable,
driGLFormatToImageFormat(format),
&drawable->dri2.stamp,
drawable->loaderPrivate,
buffer_mask,
&images);
if (images.image_mask & __DRI_IMAGE_BUFFER_FRONT) {
drawable->w = images.front->width;
drawable->h = images.front->height;
intel_update_image_buffer(brw,
drawable,
front_rb,
images.front,
__DRI_IMAGE_BUFFER_FRONT);
}
if (images.image_mask & __DRI_IMAGE_BUFFER_BACK) {
drawable->w = images.back->width;
drawable->h = images.back->height;
intel_update_image_buffer(brw,
drawable,
back_rb,
images.back,
__DRI_IMAGE_BUFFER_BACK);
}
}
static void
intelDrawBuffer(struct gl_context * ctx, GLenum mode)
{
if (brw_is_front_buffer_drawing(ctx->DrawBuffer)) {
struct brw_context *const brw = brw_context(ctx);
/* If we might be front-buffer rendering on this buffer for the first
* time, invalidate our DRI drawable so we'll ask for new buffers
* (including the fake front) before we start rendering again.
*/
dri2InvalidateDrawable(brw->driContext->driDrawablePriv);
}
}
/**
* intel_prepare_render should be called anywhere that curent read/drawbuffer
* state is required.
*/
void
intel_prepare_render(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
__DRIcontext *driContext = brw->driContext;
__DRIdrawable *drawable;
drawable = driContext->driDrawablePriv;
if (drawable && drawable->dri2.stamp != driContext->dri2.draw_stamp) {
if (drawable->lastStamp != drawable->dri2.stamp)
intel_update_renderbuffers(driContext, drawable);
driContext->dri2.draw_stamp = drawable->dri2.stamp;
}
drawable = driContext->driReadablePriv;
if (drawable && drawable->dri2.stamp != driContext->dri2.read_stamp) {
if (drawable->lastStamp != drawable->dri2.stamp)
intel_update_renderbuffers(driContext, drawable);
driContext->dri2.read_stamp = drawable->dri2.stamp;
}
/* If we're currently rendering to the front buffer, the rendering
* that will happen next will probably dirty the front buffer. So
* mark it as dirty here.
*/
if (brw_is_front_buffer_drawing(ctx->DrawBuffer))
brw->front_buffer_dirty = true;
/* Wait for the swapbuffers before the one we just emitted, so we
* don't get too many swaps outstanding for apps that are GPU-heavy
* but not CPU-heavy.
*
* We're using intelDRI2Flush (called from the loader before
* swapbuffer) and glFlush (for front buffer rendering) as the
* indicator that a frame is done and then throttle when we get
* here as we prepare to render the next frame. At this point for
* round trips for swap/copy and getting new buffers are done and
* we'll spend less time waiting on the GPU.
*
* Unfortunately, we don't have a handle to the batch containing
* the swap, and getting our hands on that doesn't seem worth it,
* so we just us the first batch we emitted after the last swap.
*/
if (brw->need_throttle && brw->first_post_swapbuffers_batch) {
if (!brw->disable_throttling)
drm_intel_bo_wait_rendering(brw->first_post_swapbuffers_batch);
drm_intel_bo_unreference(brw->first_post_swapbuffers_batch);
brw->first_post_swapbuffers_batch = NULL;
brw->need_throttle = false;
}
}
static void
intel_update_image_buffer(struct brw_context *intel,
__DRIdrawable *drawable,
struct intel_renderbuffer *rb,
__DRIimage *buffer,
enum __DRIimageBufferMask buffer_type)
{
struct intel_region *region = buffer->region;
struct gl_framebuffer *fb = drawable->driverPrivate;
if (!rb || !region)
return;
unsigned num_samples = rb->Base.Base.NumSamples;
/* Check and see if we're already bound to the right
* buffer object
*/
if (num_samples == 0) {
if (rb->mt &&
rb->mt->region &&
rb->mt->region->bo == region->bo)
return;
} else {
if (rb->singlesample_mt &&
rb->singlesample_mt->region &&
rb->singlesample_mt->region->bo == region->bo)
return;
}
intel_update_winsys_renderbuffer_miptree(intel, rb, region);
if (brw_is_front_buffer_drawing(fb) &&
buffer_type == __DRI_IMAGE_BUFFER_FRONT &&
rb->Base.Base.NumSamples > 1) {
intel_renderbuffer_upsample(intel, rb);
}
}
/**
* \brief Call this after drawing to mark which buffers need resolving
*
* If the depth buffer was written to and if it has an accompanying HiZ
* buffer, then mark that it needs a depth resolve.
*
* If the color buffer is a multisample window system buffer, then
* mark that it needs a downsample.
*
* Also mark any render targets which will be textured as needing a render
* cache flush.
*/
static void
brw_postdraw_set_buffers_need_resolve(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
struct gl_framebuffer *fb = ctx->DrawBuffer;
struct intel_renderbuffer *front_irb = NULL;
struct intel_renderbuffer *back_irb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
struct intel_renderbuffer *depth_irb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
struct intel_renderbuffer *stencil_irb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
struct gl_renderbuffer_attachment *depth_att = &fb->Attachment[BUFFER_DEPTH];
if (brw_is_front_buffer_drawing(fb))
front_irb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
if (front_irb)
front_irb->need_downsample = true;
if (back_irb)
back_irb->need_downsample = true;
if (depth_irb && ctx->Depth.Mask) {
intel_renderbuffer_att_set_needs_depth_resolve(depth_att);
brw_render_cache_set_add_bo(brw, depth_irb->mt->bo);
}
if (ctx->Extensions.ARB_stencil_texturing &&
stencil_irb && ctx->Stencil._WriteEnabled) {
brw_render_cache_set_add_bo(brw, stencil_irb->mt->bo);
}
for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
struct intel_renderbuffer *irb =
intel_renderbuffer(fb->_ColorDrawBuffers[i]);
if (irb)
brw_render_cache_set_add_bo(brw, irb->mt->bo);
}
}
static void
intel_update_image_buffer(struct brw_context *intel,
__DRIdrawable *drawable,
struct intel_renderbuffer *rb,
__DRIimage *buffer,
enum __DRIimageBufferMask buffer_type)
{
struct gl_framebuffer *fb = drawable->driverPrivate;
if (!rb || !buffer->bo)
return;
unsigned num_samples = rb->Base.Base.NumSamples;
/* Check and see if we're already bound to the right
* buffer object
*/
struct intel_mipmap_tree *last_mt;
if (num_samples == 0)
last_mt = rb->mt;
else
last_mt = rb->singlesample_mt;
if (last_mt && last_mt->bo == buffer->bo)
return;
intel_update_winsys_renderbuffer_miptree(intel, rb, buffer->bo,
buffer->width, buffer->height,
buffer->pitch);
if (brw_is_front_buffer_drawing(fb) &&
buffer_type == __DRI_IMAGE_BUFFER_FRONT &&
rb->Base.Base.NumSamples > 1) {
intel_renderbuffer_upsample(intel, rb);
}
}
/**
* \brief Assign a DRI buffer's DRM region to a renderbuffer.
*
* This is called from intel_update_renderbuffers().
*
* \par Note:
* DRI buffers whose attachment point is DRI2BufferStencil or
* DRI2BufferDepthStencil are handled as special cases.
*
* \param buffer_name is a human readable name, such as "dri2 front buffer",
* that is passed to drm_intel_bo_gem_create_from_name().
*
* \see intel_update_renderbuffers()
*/
static void
intel_process_dri2_buffer(struct brw_context *brw,
__DRIdrawable *drawable,
__DRIbuffer *buffer,
struct intel_renderbuffer *rb,
const char *buffer_name)
{
struct gl_framebuffer *fb = drawable->driverPrivate;
drm_intel_bo *bo;
if (!rb)
return;
unsigned num_samples = rb->Base.Base.NumSamples;
/* We try to avoid closing and reopening the same BO name, because the first
* use of a mapping of the buffer involves a bunch of page faulting which is
* moderately expensive.
*/
struct intel_mipmap_tree *last_mt;
if (num_samples == 0)
last_mt = rb->mt;
else
last_mt = rb->singlesample_mt;
uint32_t old_name = 0;
if (last_mt) {
/* The bo already has a name because the miptree was created by a
* previous call to intel_process_dri2_buffer(). If a bo already has a
* name, then drm_intel_bo_flink() is a low-cost getter. It does not
* create a new name.
*/
drm_intel_bo_flink(last_mt->bo, &old_name);
}
if (old_name == buffer->name)
return;
if (unlikely(INTEL_DEBUG & DEBUG_DRI)) {
fprintf(stderr,
"attaching buffer %d, at %d, cpp %d, pitch %d\n",
buffer->name, buffer->attachment,
buffer->cpp, buffer->pitch);
}
intel_miptree_release(&rb->mt);
bo = drm_intel_bo_gem_create_from_name(brw->bufmgr, buffer_name,
buffer->name);
if (!bo) {
fprintf(stderr,
"Failed to open BO for returned DRI2 buffer "
"(%dx%d, %s, named %d).\n"
"This is likely a bug in the X Server that will lead to a "
"crash soon.\n",
drawable->w, drawable->h, buffer_name, buffer->name);
return;
}
intel_update_winsys_renderbuffer_miptree(brw, rb, bo,
drawable->w, drawable->h,
buffer->pitch);
if (brw_is_front_buffer_drawing(fb) &&
(buffer->attachment == __DRI_BUFFER_FRONT_LEFT ||
buffer->attachment == __DRI_BUFFER_FAKE_FRONT_LEFT) &&
rb->Base.Base.NumSamples > 1) {
intel_renderbuffer_upsample(brw, rb);
}
assert(rb->mt);
drm_intel_bo_unreference(bo);
}
/**
* \brief Assign a DRI buffer's DRM region to a renderbuffer.
*
* This is called from intel_update_renderbuffers().
*
* \par Note:
* DRI buffers whose attachment point is DRI2BufferStencil or
* DRI2BufferDepthStencil are handled as special cases.
*
* \param buffer_name is a human readable name, such as "dri2 front buffer",
* that is passed to intel_region_alloc_for_handle().
*
* \see intel_update_renderbuffers()
* \see intel_region_alloc_for_handle()
*/
static void
intel_process_dri2_buffer(struct brw_context *brw,
__DRIdrawable *drawable,
__DRIbuffer *buffer,
struct intel_renderbuffer *rb,
const char *buffer_name)
{
struct intel_region *region = NULL;
struct gl_framebuffer *fb = drawable->driverPrivate;
if (!rb)
return;
unsigned num_samples = rb->Base.Base.NumSamples;
/* We try to avoid closing and reopening the same BO name, because the first
* use of a mapping of the buffer involves a bunch of page faulting which is
* moderately expensive.
*/
if (num_samples == 0) {
if (rb->mt &&
rb->mt->region &&
rb->mt->region->name == buffer->name)
return;
} else {
if (rb->singlesample_mt &&
rb->singlesample_mt->region &&
rb->singlesample_mt->region->name == buffer->name)
return;
}
if (unlikely(INTEL_DEBUG & DEBUG_DRI)) {
fprintf(stderr,
"attaching buffer %d, at %d, cpp %d, pitch %d\n",
buffer->name, buffer->attachment,
buffer->cpp, buffer->pitch);
}
intel_miptree_release(&rb->mt);
region = intel_region_alloc_for_handle(brw->intelScreen,
buffer->cpp,
drawable->w,
drawable->h,
buffer->pitch,
buffer->name,
buffer_name);
if (!region) {
fprintf(stderr,
"Failed to make region for returned DRI2 buffer "
"(%dx%d, named %d).\n"
"This is likely a bug in the X Server that will lead to a "
"crash soon.\n",
drawable->w, drawable->h, buffer->name);
return;
}
intel_update_winsys_renderbuffer_miptree(brw, rb, region);
if (brw_is_front_buffer_drawing(fb) &&
(buffer->attachment == __DRI_BUFFER_FRONT_LEFT ||
buffer->attachment == __DRI_BUFFER_FAKE_FRONT_LEFT) &&
rb->Base.Base.NumSamples > 1) {
intel_renderbuffer_upsample(brw, rb);
}
assert(rb->mt);
intel_region_release(®ion);
}
