src/mesa/drivers/dri/i965/intel_tex.c - platform/external/mesa3d - Git at Google

 #include "swrast/swrast.h"
 #include "main/renderbuffer.h"
 #include "main/texobj.h"
 #include "main/teximage.h"
 #include "main/mipmap.h"
 #include "drivers/common/meta.h"
 #include "brw_context.h"
 #include "brw_defines.h"
 #include "intel_buffer_objects.h"
 #include "intel_mipmap_tree.h"
 #include "intel_tex.h"
 #include "intel_fbo.h"

 #define FILE_DEBUG_FLAG DEBUG_TEXTURE

 static struct gl_texture_image *
 intelNewTextureImage(struct gl_context * ctx)
 {
    DBG("%s\n", __func__);
    (void) ctx;
    return (struct gl_texture_image *) CALLOC_STRUCT(intel_texture_image);
 }

 static void
 intelDeleteTextureImage(struct gl_context * ctx, struct gl_texture_image *img)
 {
    /* nothing special (yet) for intel_texture_image */
    _mesa_delete_texture_image(ctx, img);
 }


 static struct gl_texture_object *
 intelNewTextureObject(struct gl_context * ctx, GLuint name, GLenum target)
 {
    struct intel_texture_object *obj = CALLOC_STRUCT(intel_texture_object);

    (void) ctx;

    DBG("%s\n", __func__);

    if (obj == NULL)
       return NULL;

    _mesa_initialize_texture_object(ctx, &obj->base, name, target);

    obj->needs_validate = true;

    return &obj->base;
 }

 static void
 intelDeleteTextureObject(struct gl_context *ctx,
 			 struct gl_texture_object *texObj)
 {
    struct intel_texture_object *intelObj = intel_texture_object(texObj);

    intel_miptree_release(&intelObj->mt);
    _mesa_delete_texture_object(ctx, texObj);
 }

 static GLboolean
 intel_alloc_texture_image_buffer(struct gl_context *ctx,
 				 struct gl_texture_image *image)
 {
    struct brw_context *brw = brw_context(ctx);
    struct intel_texture_image *intel_image = intel_texture_image(image);
    struct gl_texture_object *texobj = image->TexObject;
    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);

    assert(image->Border == 0);

    /* Quantize sample count */
    if (image->NumSamples) {
       image->NumSamples = intel_quantize_num_samples(brw->screen, image->NumSamples);
       if (!image->NumSamples)
          return false;
    }

    /* Because the driver uses AllocTextureImageBuffer() internally, it may end
     * up mismatched with FreeTextureImageBuffer(), but that is safe to call
     * multiple times.
     */
    ctx->Driver.FreeTextureImageBuffer(ctx, image);

    if (!_swrast_init_texture_image(image))
       return false;

    if (intel_texobj->mt &&
        intel_miptree_match_image(intel_texobj->mt, image)) {
       intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
       DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
           __func__, texobj, image->Level,
           image->Width, image->Height, image->Depth, intel_texobj->mt);
    } else {
       intel_image->mt = intel_miptree_create_for_teximage(brw, intel_texobj,
                                                           intel_image,
                                                           0);

       /* Even if the object currently has a mipmap tree associated
        * with it, this one is a more likely candidate to represent the
        * whole object since our level didn't fit what was there
        * before, and any lower levels would fit into our miptree.
        */
       intel_miptree_reference(&intel_texobj->mt, intel_image->mt);

       DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
           __func__, texobj, image->Level,
           image->Width, image->Height, image->Depth, intel_image->mt);
    }

    intel_texobj->needs_validate = true;

    return true;
 }

 /**
  * ctx->Driver.AllocTextureStorage() handler.
  *
  * Compare this to _mesa_AllocTextureStorage_sw, which would call into
  * intel_alloc_texture_image_buffer() above.
  */
 static GLboolean
 intel_alloc_texture_storage(struct gl_context *ctx,
                             struct gl_texture_object *texobj,
                             GLsizei levels, GLsizei width,
                             GLsizei height, GLsizei depth)
 {
    struct brw_context *brw = brw_context(ctx);
    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
    struct gl_texture_image *first_image = texobj->Image[0][0];
    int num_samples = intel_quantize_num_samples(brw->screen,
                                                 first_image->NumSamples);
    const int numFaces = _mesa_num_tex_faces(texobj->Target);
    int face;
    int level;

    /* If the object's current miptree doesn't match what we need, make a new
     * one.
     */
    if (!intel_texobj->mt ||
        !intel_miptree_match_image(intel_texobj->mt, first_image) ||
        intel_texobj->mt->last_level != levels - 1) {
       intel_miptree_release(&intel_texobj->mt);

       intel_get_image_dims(first_image, &width, &height, &depth);
       intel_texobj->mt = intel_miptree_create(brw, texobj->Target,
                                               first_image->TexFormat,
                                               0, levels - 1,
                                               width, height, depth,
                                               num_samples,
                                               MIPTREE_LAYOUT_TILING_ANY);

       if (intel_texobj->mt == NULL) {
          return false;
       }
    }

    for (face = 0; face < numFaces; face++) {
       for (level = 0; level < levels; level++) {
          struct gl_texture_image *image = texobj->Image[face][level];
          struct intel_texture_image *intel_image = intel_texture_image(image);

          image->NumSamples = num_samples;

          _swrast_free_texture_image_buffer(ctx, image);
          if (!_swrast_init_texture_image(image))
             return false;

          intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
       }
    }

    /* The miptree is in a validated state, so no need to check later. */
    intel_texobj->needs_validate = false;
    intel_texobj->validated_first_level = 0;
    intel_texobj->validated_last_level = levels - 1;
    intel_texobj->_Format = intel_texobj->mt->format;

    return true;
 }


 static void
 intel_free_texture_image_buffer(struct gl_context * ctx,
 				struct gl_texture_image *texImage)
 {
    struct intel_texture_image *intelImage = intel_texture_image(texImage);

    DBG("%s\n", __func__);

    intel_miptree_release(&intelImage->mt);

    _swrast_free_texture_image_buffer(ctx, texImage);
 }

 /**
  * Map texture memory/buffer into user space.
  * Note: the region of interest parameters are ignored here.
  * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
  * \param mapOut  returns start of mapping of region of interest
  * \param rowStrideOut  returns row stride in bytes
  */
 static void
 intel_map_texture_image(struct gl_context *ctx,
 			struct gl_texture_image *tex_image,
 			GLuint slice,
 			GLuint x, GLuint y, GLuint w, GLuint h,
 			GLbitfield mode,
 			GLubyte **map,
 			GLint *out_stride)
 {
    struct brw_context *brw = brw_context(ctx);
    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
    struct intel_mipmap_tree *mt = intel_image->mt;
    ptrdiff_t stride;

    /* Our texture data is always stored in a miptree. */
    assert(mt);

    /* Check that our caller wasn't confused about how to map a 1D texture. */
    assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY ||
 	  h == 1);

    /* intel_miptree_map operates on a unified "slice" number that references the
     * cube face, since it's all just slices to the miptree code.
     */
    if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
       slice = tex_image->Face;

    intel_miptree_map(brw, mt,
                      tex_image->Level + tex_image->TexObject->MinLevel,
                      slice + tex_image->TexObject->MinLayer,
                      x, y, w, h, mode,
                      (void **)map, &stride);

    *out_stride = stride;
 }

 static void
 intel_unmap_texture_image(struct gl_context *ctx,
 			  struct gl_texture_image *tex_image, GLuint slice)
 {
    struct brw_context *brw = brw_context(ctx);
    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
    struct intel_mipmap_tree *mt = intel_image->mt;

    if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
       slice = tex_image->Face;

    intel_miptree_unmap(brw, mt,
          tex_image->Level + tex_image->TexObject->MinLevel,
          slice + tex_image->TexObject->MinLayer);
 }

 static GLboolean
 intel_texture_view(struct gl_context *ctx,
                    struct gl_texture_object *texObj,
                    struct gl_texture_object *origTexObj)
 {
    struct brw_context *brw = brw_context(ctx);
    struct intel_texture_object *intel_tex = intel_texture_object(texObj);
    struct intel_texture_object *intel_orig_tex = intel_texture_object(origTexObj);

    assert(intel_orig_tex->mt);
    intel_miptree_reference(&intel_tex->mt, intel_orig_tex->mt);

    /* Since we can only make views of immutable-format textures,
     * we can assume that everything is in origTexObj's miptree.
     *
     * Mesa core has already made us a copy of all the teximage objects,
     * except it hasn't copied our mt pointers, etc.
     */
    const int numFaces = _mesa_num_tex_faces(texObj->Target);
    const int numLevels = texObj->NumLevels;

    int face;
    int level;

    for (face = 0; face < numFaces; face++) {
       for (level = 0; level < numLevels; level++) {
          struct gl_texture_image *image = texObj->Image[face][level];
          struct intel_texture_image *intel_image = intel_texture_image(image);

          intel_miptree_reference(&intel_image->mt, intel_orig_tex->mt);
       }
    }

    /* The miptree is in a validated state, so no need to check later. */
    intel_tex->needs_validate = false;
    intel_tex->validated_first_level = 0;
    intel_tex->validated_last_level = numLevels - 1;

    /* Set the validated texture format, with the same adjustments that
     * would have been applied to determine the underlying texture's
     * mt->format.
     */
    intel_tex->_Format = intel_depth_format_for_depthstencil_format(
          intel_lower_compressed_format(brw, texObj->Image[0][0]->TexFormat));

    return GL_TRUE;
 }

 static bool
 intel_set_texture_storage_for_buffer_object(struct gl_context *ctx,
                                             struct gl_texture_object *tex_obj,
                                             struct gl_buffer_object *buffer_obj,
                                             uint32_t buffer_offset,
                                             uint32_t row_stride,
                                             bool read_only)
 {
    struct brw_context *brw = brw_context(ctx);
    struct intel_texture_object *intel_texobj = intel_texture_object(tex_obj);
    struct gl_texture_image *image = tex_obj->Image[0][0];
    struct intel_texture_image *intel_image = intel_texture_image(image);
    struct intel_buffer_object *intel_buffer_obj = intel_buffer_object(buffer_obj);

    if (!read_only) {
       /* Renderbuffers have the restriction that the buffer offset and
        * surface pitch must be a multiple of the element size.  If it's
        * not, we have to fail and fall back to software.
        */
       int cpp = _mesa_get_format_bytes(image->TexFormat);
       if (buffer_offset % cpp || row_stride % cpp) {
          perf_debug("Bad PBO alignment; fallback to CPU mapping\n");
          return false;
       }

       if (!brw->format_supported_as_render_target[image->TexFormat]) {
          perf_debug("Non-renderable PBO format; fallback to CPU mapping\n");
          return false;
       }
    }

    assert(intel_texobj->mt == NULL);

    drm_intel_bo *bo = intel_bufferobj_buffer(brw, intel_buffer_obj,
                                              buffer_offset,
                                              row_stride * image->Height);
    intel_texobj->mt =
       intel_miptree_create_for_bo(brw, bo,
                                   image->TexFormat,
                                   buffer_offset,
                                   image->Width, image->Height, image->Depth,
                                   row_stride,
                                   0);
    if (!intel_texobj->mt)
       return false;

    if (!_swrast_init_texture_image(image))
       return false;

    intel_miptree_reference(&intel_image->mt, intel_texobj->mt);

    /* The miptree is in a validated state, so no need to check later. */
    intel_texobj->needs_validate = false;
    intel_texobj->validated_first_level = 0;
    intel_texobj->validated_last_level = 0;
    intel_texobj->_Format = intel_texobj->mt->format;

    return true;
 }

 static void
 intel_texture_barrier(struct gl_context *ctx)
 {
    struct brw_context *brw = brw_context(ctx);

    if (brw->gen >= 6) {
       brw_emit_pipe_control_flush(brw,
                                   PIPE_CONTROL_DEPTH_CACHE_FLUSH |
                                   PIPE_CONTROL_RENDER_TARGET_FLUSH |
                                   PIPE_CONTROL_CS_STALL);

       brw_emit_pipe_control_flush(brw,
                                   PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE);
    } else {
       brw_emit_mi_flush(brw);
    }
 }

 void
 intelInitTextureFuncs(struct dd_function_table *functions)
 {
    functions->NewTextureObject = intelNewTextureObject;
    functions->NewTextureImage = intelNewTextureImage;
    functions->DeleteTextureImage = intelDeleteTextureImage;
    functions->DeleteTexture = intelDeleteTextureObject;
    functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
    functions->AllocTextureStorage = intel_alloc_texture_storage;
    functions->MapTextureImage = intel_map_texture_image;
    functions->UnmapTextureImage = intel_unmap_texture_image;
    functions->TextureView = intel_texture_view;
    functions->SetTextureStorageForBufferObject =
       intel_set_texture_storage_for_buffer_object;
    functions->TextureBarrier = intel_texture_barrier;
 }
	#include "swrast/swrast.h"
	#include "main/renderbuffer.h"
	#include "main/texobj.h"
	#include "main/teximage.h"
	#include "main/mipmap.h"
	#include "drivers/common/meta.h"
	#include "brw_context.h"
	#include "brw_defines.h"
	#include "intel_buffer_objects.h"
	#include "intel_mipmap_tree.h"
	#include "intel_tex.h"
	#include "intel_fbo.h"

	#define FILE_DEBUG_FLAG DEBUG_TEXTURE

	static struct gl_texture_image *
	intelNewTextureImage(struct gl_context * ctx)
	{
	DBG("%s\n", __func__);
	(void) ctx;
	return (struct gl_texture_image *) CALLOC_STRUCT(intel_texture_image);
	}

	static void
	intelDeleteTextureImage(struct gl_context * ctx, struct gl_texture_image *img)
	{
	/* nothing special (yet) for intel_texture_image */
	_mesa_delete_texture_image(ctx, img);
	}


	static struct gl_texture_object *
	intelNewTextureObject(struct gl_context * ctx, GLuint name, GLenum target)
	{
	struct intel_texture_object *obj = CALLOC_STRUCT(intel_texture_object);

	(void) ctx;

	DBG("%s\n", __func__);

	if (obj == NULL)
	return NULL;

	_mesa_initialize_texture_object(ctx, &obj->base, name, target);

	obj->needs_validate = true;

	return &obj->base;
	}

	static void
	intelDeleteTextureObject(struct gl_context *ctx,
	struct gl_texture_object *texObj)
	{
	struct intel_texture_object *intelObj = intel_texture_object(texObj);

	intel_miptree_release(&intelObj->mt);
	_mesa_delete_texture_object(ctx, texObj);
	}

	static GLboolean
	intel_alloc_texture_image_buffer(struct gl_context *ctx,
	struct gl_texture_image *image)
	{
	struct brw_context *brw = brw_context(ctx);
	struct intel_texture_image *intel_image = intel_texture_image(image);
	struct gl_texture_object *texobj = image->TexObject;
	struct intel_texture_object *intel_texobj = intel_texture_object(texobj);

	assert(image->Border == 0);

	/* Quantize sample count */
	if (image->NumSamples) {
	image->NumSamples = intel_quantize_num_samples(brw->screen, image->NumSamples);
	if (!image->NumSamples)
	return false;
	}

	/* Because the driver uses AllocTextureImageBuffer() internally, it may end
	* up mismatched with FreeTextureImageBuffer(), but that is safe to call
	* multiple times.
	*/
	ctx->Driver.FreeTextureImageBuffer(ctx, image);

	if (!_swrast_init_texture_image(image))
	return false;

	if (intel_texobj->mt &&
	intel_miptree_match_image(intel_texobj->mt, image)) {
	intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
	DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
	__func__, texobj, image->Level,
	image->Width, image->Height, image->Depth, intel_texobj->mt);
	} else {
	intel_image->mt = intel_miptree_create_for_teximage(brw, intel_texobj,
	intel_image,
	0);

	/* Even if the object currently has a mipmap tree associated
	* with it, this one is a more likely candidate to represent the
	* whole object since our level didn't fit what was there
	* before, and any lower levels would fit into our miptree.
	*/
	intel_miptree_reference(&intel_texobj->mt, intel_image->mt);

	DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
	__func__, texobj, image->Level,
	image->Width, image->Height, image->Depth, intel_image->mt);
	}

	intel_texobj->needs_validate = true;

	return true;
	}

	/**
	* ctx->Driver.AllocTextureStorage() handler.
	*
	* Compare this to _mesa_AllocTextureStorage_sw, which would call into
	* intel_alloc_texture_image_buffer() above.
	*/
	static GLboolean
	intel_alloc_texture_storage(struct gl_context *ctx,
	struct gl_texture_object *texobj,
	GLsizei levels, GLsizei width,
	GLsizei height, GLsizei depth)
	{
	struct brw_context *brw = brw_context(ctx);
	struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
	struct gl_texture_image *first_image = texobj->Image[0][0];
	int num_samples = intel_quantize_num_samples(brw->screen,
	first_image->NumSamples);
	const int numFaces = _mesa_num_tex_faces(texobj->Target);
	int face;
	int level;

	/* If the object's current miptree doesn't match what we need, make a new
	* one.
	*/
	if (!intel_texobj->mt \|\|
	!intel_miptree_match_image(intel_texobj->mt, first_image) \|\|
	intel_texobj->mt->last_level != levels - 1) {
	intel_miptree_release(&intel_texobj->mt);

	intel_get_image_dims(first_image, &width, &height, &depth);
	intel_texobj->mt = intel_miptree_create(brw, texobj->Target,
	first_image->TexFormat,
	0, levels - 1,
	width, height, depth,
	num_samples,
	MIPTREE_LAYOUT_TILING_ANY);

	if (intel_texobj->mt == NULL) {
	return false;
	}
	}

	for (face = 0; face < numFaces; face++) {
	for (level = 0; level < levels; level++) {
	struct gl_texture_image *image = texobj->Image[face][level];
	struct intel_texture_image *intel_image = intel_texture_image(image);

	image->NumSamples = num_samples;

	_swrast_free_texture_image_buffer(ctx, image);
	if (!_swrast_init_texture_image(image))
	return false;

	intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
	}
	}

	/* The miptree is in a validated state, so no need to check later. */
	intel_texobj->needs_validate = false;
	intel_texobj->validated_first_level = 0;
	intel_texobj->validated_last_level = levels - 1;
	intel_texobj->_Format = intel_texobj->mt->format;

	return true;
	}


	static void
	intel_free_texture_image_buffer(struct gl_context * ctx,
	struct gl_texture_image *texImage)
	{
	struct intel_texture_image *intelImage = intel_texture_image(texImage);

	DBG("%s\n", __func__);

	intel_miptree_release(&intelImage->mt);

	_swrast_free_texture_image_buffer(ctx, texImage);
	}

	/**
	* Map texture memory/buffer into user space.
	* Note: the region of interest parameters are ignored here.
	* \param mode bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
	* \param mapOut returns start of mapping of region of interest
	* \param rowStrideOut returns row stride in bytes
	*/
	static void
	intel_map_texture_image(struct gl_context *ctx,
	struct gl_texture_image *tex_image,
	GLuint slice,
	GLuint x, GLuint y, GLuint w, GLuint h,
	GLbitfield mode,
	GLubyte **map,
	GLint *out_stride)
	{
	struct brw_context *brw = brw_context(ctx);
	struct intel_texture_image *intel_image = intel_texture_image(tex_image);
	struct intel_mipmap_tree *mt = intel_image->mt;
	ptrdiff_t stride;

	/* Our texture data is always stored in a miptree. */
	assert(mt);

	/* Check that our caller wasn't confused about how to map a 1D texture. */
	assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY \|\|
	h == 1);

	/* intel_miptree_map operates on a unified "slice" number that references the
	* cube face, since it's all just slices to the miptree code.
	*/
	if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
	slice = tex_image->Face;

	intel_miptree_map(brw, mt,
	tex_image->Level + tex_image->TexObject->MinLevel,
	slice + tex_image->TexObject->MinLayer,
	x, y, w, h, mode,
	(void **)map, &stride);

	*out_stride = stride;
	}

	static void
	intel_unmap_texture_image(struct gl_context *ctx,
	struct gl_texture_image *tex_image, GLuint slice)
	{
	struct brw_context *brw = brw_context(ctx);
	struct intel_texture_image *intel_image = intel_texture_image(tex_image);
	struct intel_mipmap_tree *mt = intel_image->mt;

	if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
	slice = tex_image->Face;

	intel_miptree_unmap(brw, mt,
	tex_image->Level + tex_image->TexObject->MinLevel,
	slice + tex_image->TexObject->MinLayer);
	}

	static GLboolean
	intel_texture_view(struct gl_context *ctx,
	struct gl_texture_object *texObj,
	struct gl_texture_object *origTexObj)
	{
	struct brw_context *brw = brw_context(ctx);
	struct intel_texture_object *intel_tex = intel_texture_object(texObj);
	struct intel_texture_object *intel_orig_tex = intel_texture_object(origTexObj);

	assert(intel_orig_tex->mt);
	intel_miptree_reference(&intel_tex->mt, intel_orig_tex->mt);

	/* Since we can only make views of immutable-format textures,
	* we can assume that everything is in origTexObj's miptree.
	*
	* Mesa core has already made us a copy of all the teximage objects,
	* except it hasn't copied our mt pointers, etc.
	*/
	const int numFaces = _mesa_num_tex_faces(texObj->Target);
	const int numLevels = texObj->NumLevels;

	int face;
	int level;

	for (face = 0; face < numFaces; face++) {
	for (level = 0; level < numLevels; level++) {
	struct gl_texture_image *image = texObj->Image[face][level];
	struct intel_texture_image *intel_image = intel_texture_image(image);

	intel_miptree_reference(&intel_image->mt, intel_orig_tex->mt);
	}
	}

	/* The miptree is in a validated state, so no need to check later. */
	intel_tex->needs_validate = false;
	intel_tex->validated_first_level = 0;
	intel_tex->validated_last_level = numLevels - 1;

	/* Set the validated texture format, with the same adjustments that
	* would have been applied to determine the underlying texture's
	* mt->format.
	*/
	intel_tex->_Format = intel_depth_format_for_depthstencil_format(
	intel_lower_compressed_format(brw, texObj->Image[0][0]->TexFormat));

	return GL_TRUE;
	}

	static bool
	intel_set_texture_storage_for_buffer_object(struct gl_context *ctx,
	struct gl_texture_object *tex_obj,
	struct gl_buffer_object *buffer_obj,
	uint32_t buffer_offset,
	uint32_t row_stride,
	bool read_only)
	{
	struct brw_context *brw = brw_context(ctx);
	struct intel_texture_object *intel_texobj = intel_texture_object(tex_obj);
	struct gl_texture_image *image = tex_obj->Image[0][0];
	struct intel_texture_image *intel_image = intel_texture_image(image);
	struct intel_buffer_object *intel_buffer_obj = intel_buffer_object(buffer_obj);

	if (!read_only) {
	/* Renderbuffers have the restriction that the buffer offset and
	* surface pitch must be a multiple of the element size. If it's
	* not, we have to fail and fall back to software.
	*/
	int cpp = _mesa_get_format_bytes(image->TexFormat);
	if (buffer_offset % cpp \|\| row_stride % cpp) {
	perf_debug("Bad PBO alignment; fallback to CPU mapping\n");
	return false;
	}

	if (!brw->format_supported_as_render_target[image->TexFormat]) {
	perf_debug("Non-renderable PBO format; fallback to CPU mapping\n");
	return false;
	}
	}

	assert(intel_texobj->mt == NULL);

	drm_intel_bo *bo = intel_bufferobj_buffer(brw, intel_buffer_obj,
	buffer_offset,
	row_stride * image->Height);
	intel_texobj->mt =
	intel_miptree_create_for_bo(brw, bo,
	image->TexFormat,
	buffer_offset,
	image->Width, image->Height, image->Depth,
	row_stride,
	0);
	if (!intel_texobj->mt)
	return false;

	if (!_swrast_init_texture_image(image))
	return false;

	intel_miptree_reference(&intel_image->mt, intel_texobj->mt);

	/* The miptree is in a validated state, so no need to check later. */
	intel_texobj->needs_validate = false;
	intel_texobj->validated_first_level = 0;
	intel_texobj->validated_last_level = 0;
	intel_texobj->_Format = intel_texobj->mt->format;

	return true;
	}

	static void
	intel_texture_barrier(struct gl_context *ctx)
	{
	struct brw_context *brw = brw_context(ctx);

	if (brw->gen >= 6) {
	brw_emit_pipe_control_flush(brw,
	PIPE_CONTROL_DEPTH_CACHE_FLUSH \|
	PIPE_CONTROL_RENDER_TARGET_FLUSH \|
	PIPE_CONTROL_CS_STALL);

	brw_emit_pipe_control_flush(brw,
	PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE);
	} else {
	brw_emit_mi_flush(brw);
	}
	}

	void
	intelInitTextureFuncs(struct dd_function_table *functions)
	{
	functions->NewTextureObject = intelNewTextureObject;
	functions->NewTextureImage = intelNewTextureImage;
	functions->DeleteTextureImage = intelDeleteTextureImage;
	functions->DeleteTexture = intelDeleteTextureObject;
	functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
	functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
	functions->AllocTextureStorage = intel_alloc_texture_storage;
	functions->MapTextureImage = intel_map_texture_image;
	functions->UnmapTextureImage = intel_unmap_texture_image;
	functions->TextureView = intel_texture_view;
	functions->SetTextureStorageForBufferObject =
	intel_set_texture_storage_for_buffer_object;
	functions->TextureBarrier = intel_texture_barrier;
	}