[PATCH 7/8] dri: add __DRIimageLoaderExtension and __DRIimageDriverExtension
Kristian Høgsberg
hoegsberg at gmail.com
Tue Nov 5 22:25:54 PST 2013
On Mon, Nov 04, 2013 at 06:23:27PM -0800, Keith Packard wrote:
> These provide an interface between the driver and the loader to allocate
> color buffers through the DRIimage extension interface rather than through a
> loader-specific extension (as is used by DRI2, for instance).
>
> The driver uses the loader 'getBuffers' interface to allocate color buffers.
>
> The loader uses the createNewScreen2, createNewDrawable, createNewContext,
> getAPIMask and createContextAttribs APIS (mostly shared with DRI2).
>
> This interface will work with the DRI3 loader, and should also work with GBM
> and other loaders so that drivers need not be customized for each new loader
> interface, as long as they provide this image interface.
>
> Signed-off-by: Keith Packard <keithp at keithp.com>
> ---
> include/GL/internal/dri_interface.h | 112 +++++++++++++++++++++++++
> src/mesa/drivers/dri/common/dri_util.c | 113 +++++++++++++++++++++++++
> src/mesa/drivers/dri/common/dri_util.h | 6 ++
> src/mesa/drivers/dri/i915/intel_context.c | 111 ++++++++++++++++++++++++-
> src/mesa/drivers/dri/i915/intel_mipmap_tree.c | 33 ++++++++
> src/mesa/drivers/dri/i915/intel_mipmap_tree.h | 8 ++
> src/mesa/drivers/dri/i915/intel_screen.c | 1 +
> src/mesa/drivers/dri/i965/brw_context.c | 114 ++++++++++++++++++++++++--
> src/mesa/drivers/dri/i965/brw_context.h | 16 ++--
> src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 61 ++++++++++++++
> src/mesa/drivers/dri/i965/intel_mipmap_tree.h | 8 ++
> src/mesa/drivers/dri/i965/intel_screen.c | 5 +-
> 12 files changed, 568 insertions(+), 20 deletions(-)
>
> diff --git a/include/GL/internal/dri_interface.h b/include/GL/internal/dri_interface.h
> index 907aeca..8fc1fa6 100644
> --- a/include/GL/internal/dri_interface.h
> +++ b/include/GL/internal/dri_interface.h
> @@ -86,6 +86,10 @@ typedef struct __DRIdri2LoaderExtensionRec __DRIdri2LoaderExtension;
> typedef struct __DRI2flushExtensionRec __DRI2flushExtension;
> typedef struct __DRI2throttleExtensionRec __DRI2throttleExtension;
>
> +
> +typedef struct __DRIimageLoaderExtensionRec __DRIimageLoaderExtension;
> +typedef struct __DRIimageDriverExtensionRec __DRIimageDriverExtension;
> +
> /*@}*/
>
>
> @@ -1288,4 +1292,112 @@ typedef struct __DRIDriverVtableExtensionRec {
> const struct __DriverAPIRec *vtable;
> } __DRIDriverVtableExtension;
>
> +/**
> + * Image Loader extension. Drivers use this to allocate color buffers
> + */
> +
> +#define __DRI_DRIVER_EXTENSIONS "__driDriverExtensions"
> +
> +enum __DRIimageBufferMask {
> + __DRI_IMAGE_BUFFER_BACK = (1 << 0),
> + __DRI_IMAGE_BUFFER_FRONT = (1 << 1)
> +};
> +
> +struct __DRIimageList {
> + __DRIimage *back;
> + __DRIimage *front;
> +};
> +
> +#define __DRI_IMAGE_LOADER "DRI_IMAGE_LOADER"
> +#define __DRI_IMAGE_LOADER_VERSION 1
> +
> +struct __DRIimageLoaderExtensionRec {
> + __DRIextension base;
> +
> + /**
> + * Allocate color buffers.
> + *
> + * \param driDrawable
> + * \param width Width of allocated buffers
> + * \param height Height of allocated buffers
> + * \param format one of __DRI_IMAGE_FORMAT_*
> + * \param stamp Address of variable to be updated when
> + * getBuffers must be called again
> + * \param loaderPrivate The loaderPrivate for driDrawable
> + * \param buffer_mask Set of buffers to allocate
> + * \param buffers Returned buffers
> + */
> + int (*getBuffers)(__DRIdrawable *driDrawable,
> + int *width, int *height,
> + unsigned int format,
> + uint32_t *stamp,
> + void *loaderPrivate,
> + uint32_t buffer_mask,
> + struct __DRIimageList *buffers);
> +
> + /**
> + * Flush pending front-buffer rendering
> + *
> + * Any rendering that has been performed to the
> + * fake front will be flushed to the front
> + *
> + * \param driDrawable Drawable whose front-buffer is to be flushed
> + * \param loaderPrivate Loader's private data that was previously passed
> + * into __DRIdri2ExtensionRec::createNewDrawable
> + */
> + void (*flushFrontBuffer)(__DRIdrawable *driDrawable, void *loaderPrivate);
> +};
> +
> +/**
> + * DRI extension.
> + */
> +
> +//struct gl_context;
> +//struct dd_function_table;
> +
> +typedef __DRIscreen *
> +(*__DRIcreateNewScreen2)(int screen, int fd,
> + const __DRIextension **extensions,
> + const __DRIextension **driver_extensions,
> + const __DRIconfig ***driver_configs,
> + void *loaderPrivate);
> +
> +typedef __DRIdrawable *
> +(*__DRIcreateNewDrawable)(__DRIscreen *screen,
> + const __DRIconfig *config,
> + void *loaderPrivate);
> +
> +typedef __DRIcontext *
> +(*__DRIcreateNewContext)(__DRIscreen *screen,
> + const __DRIconfig *config,
> + __DRIcontext *shared,
> + void *loaderPrivate);
> +
> +typedef __DRIcontext *
> +(*__DRIcreateContextAttribs)(__DRIscreen *screen,
> + int api,
> + const __DRIconfig *config,
> + __DRIcontext *shared,
> + unsigned num_attribs,
> + const uint32_t *attribs,
> + unsigned *error,
> + void *loaderPrivate);
> +
> +typedef unsigned int
> +(*__DRIgetAPIMask)(__DRIscreen *screen);
> +
> +#define __DRI_IMAGE_DRIVER "DRI_IMAGE_DRIVER"
> +#define __DRI_IMAGE_DRIVER_VERSION 1
> +
> +struct __DRIimageDriverExtensionRec {
> + __DRIextension base;
> +
> + /* Common DRI functions, shared with DRI2 */
> + __DRIcreateNewScreen2 createNewScreen2;
> + __DRIcreateNewDrawable createNewDrawable;
> + __DRIcreateNewContext createNewContext;
> + __DRIcreateContextAttribs createContextAttribs;
> + __DRIgetAPIMask getAPIMask;
> +};
> +
> #endif
> diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
> index 76c8ae5..d8cb7f6 100644
> --- a/src/mesa/drivers/dri/common/dri_util.c
> +++ b/src/mesa/drivers/dri/common/dri_util.c
> @@ -854,3 +854,116 @@ driImageFormatToGLFormat(uint32_t image_format)
> return MESA_FORMAT_NONE;
> }
> }
> +
> +/*
> + * Copyright © 2013 Keith Packard
> + *
> + * Permission to use, copy, modify, distribute, and sell this software and its
> + * documentation for any purpose is hereby granted without fee, provided that
> + * the above copyright notice appear in all copies and that both that copyright
> + * notice and this permission notice appear in supporting documentation, and
> + * that the name of the copyright holders not be used in advertising or
> + * publicity pertaining to distribution of the software without specific,
> + * written prior permission. The copyright holders make no representations
> + * about the suitability of this software for any purpose. It is provided "as
> + * is" without express or implied warranty.
> + *
> + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
> + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
> + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
> + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
> + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
> + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
> + * OF THIS SOFTWARE.
> + */
> +
> +PUBLIC const char __imageConfigOptions[] =
> + DRI_CONF_BEGIN
> + DRI_CONF_SECTION_PERFORMANCE
> + DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_1)
> + DRI_CONF_SECTION_END
> + DRI_CONF_END;
> +
> +static void
> +setup_image_loader_extensions(__DRIscreen *psp,
> + const __DRIextension *const*extensions)
> +{
> + int i;
> +
> + for (i = 0; extensions[i]; i++) {
> + if (strcmp(extensions[i]->name, __DRI_IMAGE_LOADER) == 0)
> + psp->image.loader = (__DRIimageLoaderExtension *) extensions[i];
> + }
> +}
> +
> +static __DRIscreen *
> +image_create_new_screen_2(int scrn, int fd,
> + const __DRIextension **extensions,
> + const __DRIextension **driver_extensions,
> + const __DRIconfig ***driver_configs, void *data)
> +{
> + static const __DRIextension *emptyExtensionList[] = { NULL };
> + __DRIscreen *psp;
> + drmVersionPtr version;
> +
> + psp = calloc(1, sizeof(*psp));
> + if (!psp)
> + return NULL;
> +
> + /* By default, use the global driDriverAPI symbol (non-megadrivers). */
> + psp->driver = globalDriverAPI;
> +
> + /* If the driver exposes its vtable through its extensions list
> + * (megadrivers), use that instead.
> + */
> + if (driver_extensions) {
> + for (int i = 0; driver_extensions[i]; i++) {
> + if (strcmp(driver_extensions[i]->name, __DRI_DRIVER_VTABLE) == 0) {
> + psp->driver =
> + ((__DRIDriverVtableExtension *)driver_extensions[i])->vtable;
> + }
> + }
> + }
> +
> + setupLoaderExtensions(psp, extensions);
> + setup_image_loader_extensions(psp, extensions);
> +
> + version = drmGetVersion(fd);
> + if (version) {
> + psp->drm_version.major = version->version_major;
> + psp->drm_version.minor = version->version_minor;
> + psp->drm_version.patch = version->version_patchlevel;
> + drmFreeVersion(version);
> + }
> +
> + psp->loaderPrivate = data;
> +
> + psp->extensions = emptyExtensionList;
> + psp->fd = fd;
> + psp->myNum = scrn;
> +
> + psp->api_mask = (1 << __DRI_API_OPENGL);
This is another reason this just needs to be dri2CreateNewScreen2.
The above regresses GLES* support. I tried with your ~keithp dri3
branch and using dri2CreateNewScreen2 brings back the GLESes.
> + *driver_configs = psp->driver->InitScreen(psp);
> + if (*driver_configs == NULL) {
> + free(psp);
> + return NULL;
> + }
> +
> + driParseOptionInfo(&psp->optionInfo, __imageConfigOptions);
> + driParseConfigFiles(&psp->optionCache, &psp->optionInfo, psp->myNum, "image");
> +
> + return psp;
> +}
> +
> +
> +/** Image driver interface */
> +const __DRIimageDriverExtension driImageDriverExtension = {
> + .base = { __DRI_IMAGE_DRIVER, __DRI_IMAGE_DRIVER_VERSION },
> +
> + .createNewScreen2 = image_create_new_screen_2,
> + .createNewDrawable = driCreateNewDrawable,
> + .createNewContext = driCreateNewContext,
> + .getAPIMask = driGetAPIMask,
> + .createContextAttribs = driCreateContextAttribs,
> +};
Having written the GBM and Wayland suport for this, it's pretty clear
that we just want to use __DRIdri2Extension instead of duplicating
these functions. Support for the __DRIimage based getBuffers is a
small incremental patch to src/egl/drivers/dri2:
src/egl/drivers/dri2/egl_dri2.c | 29 +++++--
src/egl/drivers/dri2/egl_dri2.h | 5 +-
src/egl/drivers/dri2/platform_drm.c | 50 ++++++++++--
src/egl/drivers/dri2/platform_wayland.c | 133 ++++++++++++++++++++++----------
src/gbm/backends/dri/gbm_dri.c | 32 +++++++-
src/gbm/backends/dri/gbm_driint.h | 11 ++-
6 files changed, 199 insertions(+), 61 deletions(-)
The problem is that technically we would have to do:
if (dri2_dpy->image_driver) {
/* use dri2_dpy->image_driver->createContextAttribs
} else if (dri2_dpy->dri2 &&
dri2_dpy->dri2->base.version >= 3) {
/* use dri2_dpy->dri2->createContextAttribs
all over the place even though they end up calling the same function.
The only real purpose of __DRIimageDriverExtension is to let the
loader know that the DRI driver supports and will use
__DRIimageLoaderExtension if provided, but we can just expose an empty
dummy extension to indicate that.
> diff --git a/src/mesa/drivers/dri/common/dri_util.h b/src/mesa/drivers/dri/common/dri_util.h
> index fd40769..6f5cd87 100644
> --- a/src/mesa/drivers/dri/common/dri_util.h
> +++ b/src/mesa/drivers/dri/common/dri_util.h
> @@ -174,6 +174,10 @@ struct __DRIscreenRec {
> __DRIuseInvalidateExtension *useInvalidate;
> } dri2;
>
> + struct {
> + __DRIimageLoaderExtension *loader;
> + } image;
> +
> driOptionCache optionInfo;
> driOptionCache optionCache;
>
> @@ -283,4 +287,6 @@ dri2InvalidateDrawable(__DRIdrawable *drawable);
> extern void
> driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv);
>
> +extern const __DRIimageDriverExtension driImageDriverExtension;
> +
> #endif /* _DRI_UTIL_H_ */
> diff --git a/src/mesa/drivers/dri/i915/intel_context.c b/src/mesa/drivers/dri/i915/intel_context.c
> index 1798bc7..8d369ff 100644
> --- a/src/mesa/drivers/dri/i915/intel_context.c
> +++ b/src/mesa/drivers/dri/i915/intel_context.c
> @@ -91,6 +91,8 @@ intelGetString(struct gl_context * ctx, GLenum name)
> }
> }
>
> +#define flushFront(screen) ((screen)->image.loader ? (screen)->image.loader->flushFrontBuffer : (screen)->dri2.loader->flushFrontBuffer)
> +
> static void
> intel_flush_front(struct gl_context *ctx)
> {
> @@ -100,11 +102,10 @@ intel_flush_front(struct gl_context *ctx)
> __DRIscreen *const screen = intel->intelScreen->driScrnPriv;
>
> if (intel->front_buffer_dirty && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
> - if (screen->dri2.loader->flushFrontBuffer != NULL &&
> + if (flushFront(screen) &&
> driDrawable &&
> driDrawable->loaderPrivate) {
> - screen->dri2.loader->flushFrontBuffer(driDrawable,
> - driDrawable->loaderPrivate);
> + flushFront(screen)(driDrawable, driDrawable->loaderPrivate);
>
> /* We set the dirty bit in intel_prepare_render() if we're
> * front buffer rendering once we get there.
> @@ -114,6 +115,9 @@ intel_flush_front(struct gl_context *ctx)
> }
> }
>
> +static void
> +intel_update_image_buffers(struct intel_context *intel, __DRIdrawable *drawable);
> +
> static unsigned
> intel_bits_per_pixel(const struct intel_renderbuffer *rb)
> {
> @@ -194,7 +198,10 @@ intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
> if (unlikely(INTEL_DEBUG & DEBUG_DRI))
> fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);
>
> - intel_update_dri2_buffers(intel, drawable);
> + if (screen->image.loader)
> + intel_update_image_buffers(intel, drawable);
> + else
> + intel_update_dri2_buffers(intel, drawable);
>
> driUpdateFramebufferSize(&intel->ctx, drawable);
> }
> @@ -787,3 +794,99 @@ intel_process_dri2_buffer(struct intel_context *intel,
> region);
> intel_region_release(®ion);
> }
> +
> +/**
> + * \brief Query DRI Image loader 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
> + * dri3
> + *
> + * 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()
> + */
> +
> +static void
> +intel_update_image_buffer(struct intel_context *intel,
> + __DRIdrawable *drawable,
> + struct intel_renderbuffer *rb,
> + __DRIimage *buffer,
> + enum __DRIimageBufferMask buffer_type)
> +{
> + struct intel_region *region = buffer->region;
> +
> + if (!rb || !region)
> + return;
> +
> + unsigned num_samples = rb->Base.Base.NumSamples;
> +
> + if (rb->mt &&
> + rb->mt->region &&
> + rb->mt->region == region)
> + return;
> +
> + intel_miptree_release(&rb->mt);
> + rb->mt = intel_miptree_create_for_image_buffer(intel,
> + buffer_type,
> + intel_rb_format(rb),
> + num_samples,
> + region);
> +}
> +
> +
> +static void
> +intel_update_image_buffers(struct intel_context *intel, __DRIdrawable *drawable)
> +{
> + struct gl_framebuffer *fb = drawable->driverPrivate;
> + __DRIscreen *screen = intel->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 ((intel->is_front_buffer_rendering || intel->is_front_buffer_reading || !back_rb) && front_rb)
> + buffer_mask |= __DRI_IMAGE_BUFFER_FRONT;
> +
> + if (back_rb)
> + buffer_mask |= __DRI_IMAGE_BUFFER_BACK;
> +
> + (*screen->image.loader->getBuffers) (drawable,
> + &drawable->w,
> + &drawable->h,
> + driGLFormatToImageFormat(format),
> + &drawable->dri2.stamp,
> + drawable->loaderPrivate,
> + buffer_mask,
> + &images);
> +
> + if (images.front) {
I think we should only look at image.front if the
__DRI_IMAGE_BUFFER_FRONT bit is set. We never want to set up a front
buffer that we didn't ask for and it seems wrong that the loader has
to clear image.front, if the driver didn't ask for front.
> + assert(front_rb);
> + intel_update_image_buffer(intel,
> + drawable,
> + front_rb,
> + images.front,
> + __DRI_IMAGE_BUFFER_FRONT);
> + }
> + if (images.back)
Same here.
> + intel_update_image_buffer(intel,
> + drawable,
> + back_rb,
> + images.back,
> + __DRI_IMAGE_BUFFER_BACK);
> +}
> diff --git a/src/mesa/drivers/dri/i915/intel_mipmap_tree.c b/src/mesa/drivers/dri/i915/intel_mipmap_tree.c
> index 8432b6d..66a7a92 100644
> --- a/src/mesa/drivers/dri/i915/intel_mipmap_tree.c
> +++ b/src/mesa/drivers/dri/i915/intel_mipmap_tree.c
> @@ -322,6 +322,39 @@ intel_miptree_create_for_dri2_buffer(struct intel_context *intel,
> return mt;
> }
>
> +/**
> + * For a singlesample image buffer, this simply wraps the given region with a miptree.
> + *
> + * For a multisample image buffer, this wraps the given region with
> + * a singlesample miptree, then creates a multisample miptree into which the
> + * singlesample miptree is embedded as a child.
> + */
> +struct intel_mipmap_tree*
> +intel_miptree_create_for_image_buffer(struct intel_context *intel,
> + enum __DRIimageBufferMask buffer_type,
> + gl_format format,
> + uint32_t num_samples,
> + struct intel_region *region)
> +{
> + struct intel_mipmap_tree *mt = NULL;
> +
> + /* Only the front and back buffers, which are color buffers, are allocated
> + * through the image loader.
> + */
> + assert(_mesa_get_format_base_format(format) == GL_RGB ||
> + _mesa_get_format_base_format(format) == GL_RGBA);
> +
> + mt = intel_miptree_create_for_bo(intel,
> + region->bo,
> + format,
> + 0,
> + region->width,
> + region->height,
> + region->pitch,
> + region->tiling);
> + return mt;
> +}
> +
> struct intel_mipmap_tree*
> intel_miptree_create_for_renderbuffer(struct intel_context *intel,
> gl_format format,
> diff --git a/src/mesa/drivers/dri/i915/intel_mipmap_tree.h b/src/mesa/drivers/dri/i915/intel_mipmap_tree.h
> index 1142af6..35cad6d 100644
> --- a/src/mesa/drivers/dri/i915/intel_mipmap_tree.h
> +++ b/src/mesa/drivers/dri/i915/intel_mipmap_tree.h
> @@ -32,6 +32,7 @@
>
> #include "intel_screen.h"
> #include "intel_regions.h"
> +#include "GL/internal/dri_interface.h"
>
> #ifdef __cplusplus
> extern "C" {
> @@ -258,6 +259,13 @@ intel_miptree_create_for_dri2_buffer(struct intel_context *intel,
> gl_format format,
> struct intel_region *region);
>
> +struct intel_mipmap_tree*
> +intel_miptree_create_for_image_buffer(struct intel_context *intel,
> + enum __DRIimageBufferMask buffer_type,
> + gl_format format,
> + uint32_t num_samples,
> + struct intel_region *region);
> +
> /**
> * Create a miptree appropriate as the storage for a non-texture renderbuffer.
> * The miptree has the following properties:
> diff --git a/src/mesa/drivers/dri/i915/intel_screen.c b/src/mesa/drivers/dri/i915/intel_screen.c
> index 12113c7..38badec 100644
> --- a/src/mesa/drivers/dri/i915/intel_screen.c
> +++ b/src/mesa/drivers/dri/i915/intel_screen.c
> @@ -1166,6 +1166,7 @@ static const struct __DRIDriverVtableExtensionRec i915_vtable = {
> /* This is the table of extensions that the loader will dlsym() for. */
> static const __DRIextension *i915_driver_extensions[] = {
> &driCoreExtension.base,
> + &driImageDriverExtension.base,
> &driDRI2Extension.base,
> &i915_vtable.base,
> &i915_config_options.base,
> diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
> index 2557d10..f3bf67f 100644
> --- a/src/mesa/drivers/dri/i965/brw_context.c
> +++ b/src/mesa/drivers/dri/i965/brw_context.c
> @@ -151,6 +151,8 @@ intelInvalidateState(struct gl_context * ctx, GLuint new_state)
> brw->NewGLState |= new_state;
> }
>
> +#define flushFront(screen) ((screen)->image.loader ? (screen)->image.loader->flushFrontBuffer : (screen)->dri2.loader->flushFrontBuffer)
> +
> static void
> intel_flush_front(struct gl_context *ctx)
> {
> @@ -160,8 +162,7 @@ intel_flush_front(struct gl_context *ctx)
> __DRIscreen *const screen = brw->intelScreen->driScrnPriv;
>
> if (brw->front_buffer_dirty && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
> - if (screen->dri2.loader->flushFrontBuffer != NULL &&
> - driDrawable &&
> + if (flushFront(screen) && driDrawable &&
> driDrawable->loaderPrivate) {
>
> /* Resolve before flushing FAKE_FRONT_LEFT to FRONT_LEFT.
> @@ -174,8 +175,7 @@ intel_flush_front(struct gl_context *ctx)
> intel_resolve_for_dri2_flush(brw, driDrawable);
> intel_batchbuffer_flush(brw);
>
> - screen->dri2.loader->flushFrontBuffer(driDrawable,
> - driDrawable->loaderPrivate);
> + flushFront(screen)(driDrawable, driDrawable->loaderPrivate);
>
> /* We set the dirty bit in intel_prepare_render() if we're
> * front buffer rendering once we get there.
> @@ -549,7 +549,7 @@ brw_process_driconf_options(struct brw_context *brw)
> driQueryOptionb(options, "disable_glsl_line_continuations");
> }
>
> -bool
> +GLboolean
> brwCreateContext(gl_api api,
> const struct gl_config *mesaVis,
> __DRIcontext *driContextPriv,
> @@ -979,6 +979,9 @@ intel_process_dri2_buffer(struct brw_context *brw,
> const char *buffer_name);
>
> static void
> +intel_update_image_buffers(struct brw_context *brw, __DRIdrawable *drawable);
> +
> +static void
> intel_update_dri2_buffers(struct brw_context *brw, __DRIdrawable *drawable)
> {
> struct gl_framebuffer *fb = drawable->driverPrivate;
> @@ -1038,6 +1041,7 @@ void
> intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
> {
> struct brw_context *brw = context->driverPrivate;
> + __DRIscreen *screen = brw->intelScreen->driScrnPriv;
>
> /* Set this up front, so that in case our buffers get invalidated
> * while we're getting new buffers, we don't clobber the stamp and
> @@ -1047,7 +1051,10 @@ intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
> if (unlikely(INTEL_DEBUG & DEBUG_DRI))
> fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);
>
> - intel_update_dri2_buffers(brw, drawable);
> + if (screen->image.loader)
> + intel_update_image_buffers(brw, drawable);
> + else
> + intel_update_dri2_buffers(brw, drawable);
>
> driUpdateFramebufferSize(&brw->ctx, drawable);
> }
> @@ -1253,3 +1260,98 @@ intel_process_dri2_buffer(struct brw_context *brw,
> region);
> intel_region_release(®ion);
> }
> +
> +/**
> + * \brief Query DRI image loader 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 from
> + * the image loader
> + *
> + * 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()
> + */
> +
> +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;
> +
> + if (!rb || !region)
> + return;
> +
> + unsigned num_samples = rb->Base.Base.NumSamples;
> +
> + if (rb->mt &&
> + rb->mt->region &&
> + rb->mt->region == region)
> + return;
> +
> + intel_miptree_release(&rb->mt);
> + rb->mt = intel_miptree_create_for_image_buffer(intel,
> + buffer_type,
> + intel_rb_format(rb),
> + num_samples,
> + region);
> +}
> +
> +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 ((brw->is_front_buffer_rendering || brw->is_front_buffer_reading || !back_rb) && front_rb)
> + buffer_mask |= __DRI_IMAGE_BUFFER_FRONT;
> +
> + if (back_rb)
> + buffer_mask |= __DRI_IMAGE_BUFFER_BACK;
> +
> + (*screen->image.loader->getBuffers) (drawable,
> + &drawable->w,
> + &drawable->h,
> + driGLFormatToImageFormat(format),
> + &drawable->dri2.stamp,
> + drawable->loaderPrivate,
> + buffer_mask,
> + &images);
> +
> + if (images.front) {
> + assert(front_rb);
> + intel_update_image_buffer(brw,
> + drawable,
> + front_rb,
> + images.front,
> + __DRI_IMAGE_BUFFER_FRONT);
> + }
> + if (images.back)
> + intel_update_image_buffer(brw,
> + drawable,
> + back_rb,
> + images.back,
> + __DRI_IMAGE_BUFFER_BACK);
> +}
> diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
> index bec4d6b..1ecbfb7 100644
> --- a/src/mesa/drivers/dri/i965/brw_context.h
> +++ b/src/mesa/drivers/dri/i965/brw_context.h
> @@ -1477,14 +1477,14 @@ void intel_prepare_render(struct brw_context *brw);
> void intel_resolve_for_dri2_flush(struct brw_context *brw,
> __DRIdrawable *drawable);
>
> -bool brwCreateContext(gl_api api,
> - const struct gl_config *mesaVis,
> - __DRIcontext *driContextPriv,
> - unsigned major_version,
> - unsigned minor_version,
> - uint32_t flags,
> - unsigned *error,
> - void *sharedContextPrivate);
> +GLboolean brwCreateContext(gl_api api,
> + const struct gl_config *mesaVis,
> + __DRIcontext *driContextPriv,
> + unsigned major_version,
> + unsigned minor_version,
> + uint32_t flags,
> + unsigned *error,
> + void *sharedContextPrivate);
>
> /*======================================================================
> * brw_misc_state.c
> diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> index 2f5e04f..08dbe88 100644
> --- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> +++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
> @@ -725,6 +725,67 @@ intel_miptree_create_for_dri2_buffer(struct brw_context *brw,
> return multisample_mt;
> }
>
> +/**
> + * For a singlesample image buffer, this simply wraps the given region with a miptree.
> + *
> + * For a multisample image buffer, this wraps the given region with
> + * a singlesample miptree, then creates a multisample miptree into which the
> + * singlesample miptree is embedded as a child.
> + */
> +struct intel_mipmap_tree*
> +intel_miptree_create_for_image_buffer(struct brw_context *intel,
> + enum __DRIimageBufferMask buffer_type,
> + gl_format format,
> + uint32_t num_samples,
> + struct intel_region *region)
> +{
> + struct intel_mipmap_tree *singlesample_mt = NULL;
> + struct intel_mipmap_tree *multisample_mt = NULL;
> +
> + /* Only the front and back buffers, which are color buffers, are allocated
> + * through the image loader.
> + */
> + assert(_mesa_get_format_base_format(format) == GL_RGB ||
> + _mesa_get_format_base_format(format) == GL_RGBA);
> +
> + singlesample_mt = intel_miptree_create_for_bo(intel,
> + region->bo,
> + format,
> + 0,
> + region->width,
> + region->height,
> + region->pitch,
> + region->tiling);
> + if (!singlesample_mt)
> + return NULL;
> +
> + intel_region_reference(&singlesample_mt->region, region);
> +
> + if (num_samples == 0)
> + return singlesample_mt;
> +
> + multisample_mt = intel_miptree_create_for_renderbuffer(intel,
> + format,
> + region->width,
> + region->height,
> + num_samples);
> + if (!multisample_mt) {
> + intel_miptree_release(&singlesample_mt);
> + return NULL;
> + }
> +
> + multisample_mt->singlesample_mt = singlesample_mt;
> + multisample_mt->need_downsample = false;
> +
> + intel_region_reference(&multisample_mt->region, region);
> +
> + if (intel->is_front_buffer_rendering && buffer_type == __DRI_IMAGE_BUFFER_FRONT) {
> + intel_miptree_upsample(intel, multisample_mt);
> + }
> +
> + return multisample_mt;
> +}
> +
> struct intel_mipmap_tree*
> intel_miptree_create_for_renderbuffer(struct brw_context *brw,
> gl_format format,
> diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
> index d718125..8777a8c 100644
> --- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
> +++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h
> @@ -32,6 +32,7 @@
>
> #include "intel_regions.h"
> #include "intel_resolve_map.h"
> +#include <GL/internal/dri_interface.h>
>
> #ifdef __cplusplus
> extern "C" {
> @@ -529,6 +530,13 @@ intel_miptree_create_for_dri2_buffer(struct brw_context *brw,
> uint32_t num_samples,
> struct intel_region *region);
>
> +struct intel_mipmap_tree*
> +intel_miptree_create_for_image_buffer(struct brw_context *intel,
> + enum __DRIimageBufferMask buffer_type,
> + gl_format format,
> + uint32_t num_samples,
> + struct intel_region *region);
> +
> /**
> * Create a miptree appropriate as the storage for a non-texture renderbuffer.
> * The miptree has the following properties:
> diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
> index f9339c1..7571921 100644
> --- a/src/mesa/drivers/dri/i965/intel_screen.c
> +++ b/src/mesa/drivers/dri/i965/intel_screen.c
> @@ -1176,7 +1176,8 @@ __DRIconfig **intelInitScreen2(__DRIscreen *psp)
> {
> struct intel_screen *intelScreen;
>
> - if (psp->dri2.loader->base.version <= 2 ||
> + if (psp->image.loader) {
> + } else if (psp->dri2.loader->base.version <= 2 ||
> psp->dri2.loader->getBuffersWithFormat == NULL) {
> fprintf(stderr,
> "\nERROR! DRI2 loader with getBuffersWithFormat() "
> @@ -1264,7 +1265,6 @@ intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
> free(intelBuffer);
> }
>
> -
> static const struct __DriverAPIRec brw_driver_api = {
> .InitScreen = intelInitScreen2,
> .DestroyScreen = intelDestroyScreen,
> @@ -1285,6 +1285,7 @@ static const struct __DRIDriverVtableExtensionRec brw_vtable = {
>
> static const __DRIextension *brw_driver_extensions[] = {
> &driCoreExtension.base,
> + &driImageDriverExtension.base,
> &driDRI2Extension.base,
> &brw_vtable.base,
> &brw_config_options.base,
> --
> 1.8.4.2
>
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