src/mesa/state_tracker/st_cb_eglimage.c - chromiumos/third_party/mesa - Git at Google

 /*
  * Mesa 3-D graphics library
  *
  * Copyright (C) 2010 LunarG Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included
  * in all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
  *
  * Authors:
  *    Chia-I Wu <olv@lunarg.com>
  */

 #include "main/errors.h"
 #include "main/texobj.h"
 #include "main/teximage.h"
 #include "util/u_inlines.h"
 #include "util/u_format.h"
 #include "st_cb_eglimage.h"
 #include "st_cb_fbo.h"
 #include "st_context.h"
 #include "st_texture.h"
 #include "st_format.h"
 #include "st_manager.h"
 #include "st_sampler_view.h"
 #include "util/u_surface.h"

 static bool
 is_format_supported(struct pipe_screen *screen, enum pipe_format format,
                     unsigned nr_samples, unsigned nr_storage_samples,
                     unsigned usage)
 {
    bool supported = screen->is_format_supported(screen, format, PIPE_TEXTURE_2D,
                                                 nr_samples, nr_storage_samples,
                                                 usage);

    /* for sampling, some formats can be emulated.. it doesn't matter that
     * the surface will have a format that the driver can't cope with because
     * we'll give it sampler view formats that it can deal with and generate
     * a shader variant that converts.
     */
    if ((usage == PIPE_BIND_SAMPLER_VIEW) && !supported) {
       if (format == PIPE_FORMAT_IYUV) {
          supported = screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM,
                                                  PIPE_TEXTURE_2D, nr_samples,
                                                  nr_storage_samples, usage);
       } else if (format == PIPE_FORMAT_NV12) {
          supported = screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM,
                                                  PIPE_TEXTURE_2D, nr_samples,
                                                  nr_storage_samples, usage) &&
                      screen->is_format_supported(screen, PIPE_FORMAT_R8G8_UNORM,
                                                  PIPE_TEXTURE_2D, nr_samples,
                                                  nr_storage_samples, usage);
       }
    }

    return supported;
 }

 /**
  * Return the gallium texture of an EGLImage.
  */
 static bool
 st_get_egl_image(struct gl_context *ctx, GLeglImageOES image_handle,
                  unsigned usage, const char *error, struct st_egl_image *out)
 {
    struct st_context *st = st_context(ctx);
    struct pipe_screen *screen = st->pipe->screen;
    struct st_manager *smapi =
       (struct st_manager *) st->iface.st_context_private;

    if (!smapi || !smapi->get_egl_image)
       return false;

    memset(out, 0, sizeof(*out));
    if (!smapi->get_egl_image(smapi, (void *) image_handle, out)) {
       /* image_handle does not refer to a valid EGL image object */
       _mesa_error(ctx, GL_INVALID_VALUE, "%s(image handle not found)", error);
       return false;
    }

    if (!is_format_supported(screen, out->format, out->texture->nr_samples,
                             out->texture->nr_storage_samples, usage)) {
       /* unable to specify a texture object using the specified EGL image */
       pipe_resource_reference(&out->texture, NULL);
       _mesa_error(ctx, GL_INVALID_OPERATION, "%s(format not supported)", error);
       return false;
    }

    return true;
 }

 /**
  * Return the base format just like _mesa_base_fbo_format does.
  */
 static GLenum
 st_pipe_format_to_base_format(enum pipe_format format)
 {
    GLenum base_format;

    if (util_format_is_depth_or_stencil(format)) {
       if (util_format_is_depth_and_stencil(format)) {
          base_format = GL_DEPTH_STENCIL;
       }
       else {
          if (format == PIPE_FORMAT_S8_UINT)
             base_format = GL_STENCIL_INDEX;
          else
             base_format = GL_DEPTH_COMPONENT;
       }
    }
    else {
       /* is this enough? */
       if (util_format_has_alpha(format))
          base_format = GL_RGBA;
       else
          base_format = GL_RGB;
    }

    return base_format;
 }

 static void
 st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
 					 struct gl_renderbuffer *rb,
 					 GLeglImageOES image_handle)
 {
    struct st_renderbuffer *strb = st_renderbuffer(rb);
    struct st_egl_image stimg;

    if (st_get_egl_image(ctx, image_handle, PIPE_BIND_RENDER_TARGET,
                         "glEGLImageTargetRenderbufferStorage",
                         &stimg)) {
       struct pipe_context *pipe = st_context(ctx)->pipe;
       struct pipe_surface *ps, surf_tmpl;

       u_surface_default_template(&surf_tmpl, stimg.texture);
       surf_tmpl.format = stimg.format;
       surf_tmpl.u.tex.level = stimg.level;
       surf_tmpl.u.tex.first_layer = stimg.layer;
       surf_tmpl.u.tex.last_layer = stimg.layer;
       ps = pipe->create_surface(pipe, stimg.texture, &surf_tmpl);
       pipe_resource_reference(&stimg.texture, NULL);

       if (!ps)
          return;

       strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
       strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
       strb->Base.InternalFormat = strb->Base._BaseFormat;

       st_set_ws_renderbuffer_surface(strb, ps);
       pipe_surface_reference(&ps, NULL);
    }
 }

 static void
 st_bind_egl_image(struct gl_context *ctx,
                   struct gl_texture_object *texObj,
                   struct gl_texture_image *texImage,
                   struct st_egl_image *stimg)
 {
    struct st_context *st = st_context(ctx);
    struct st_texture_object *stObj;
    struct st_texture_image *stImage;
    GLenum internalFormat;
    mesa_format texFormat;

    /* map pipe format to base format */
    if (util_format_get_component_bits(stimg->format,
                                       UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
       internalFormat = GL_RGBA;
    else
       internalFormat = GL_RGB;

    stObj = st_texture_object(texObj);
    stImage = st_texture_image(texImage);

    /* switch to surface based */
    if (!stObj->surface_based) {
       _mesa_clear_texture_object(ctx, texObj, NULL);
       stObj->surface_based = GL_TRUE;
    }

    texFormat = st_pipe_format_to_mesa_format(stimg->format);

    /* TODO RequiredTextureImageUnits should probably be reset back
     * to 1 somewhere if different texture is bound??
     */
    if (texFormat == MESA_FORMAT_NONE) {
       switch (stimg->format) {
       case PIPE_FORMAT_NV12:
          texFormat = MESA_FORMAT_R_UNORM8;
          texObj->RequiredTextureImageUnits = 2;
          break;
       case PIPE_FORMAT_IYUV:
          texFormat = MESA_FORMAT_R_UNORM8;
          texObj->RequiredTextureImageUnits = 3;
          break;
       default:
          unreachable("bad YUV format!");
       }
    }

    _mesa_init_teximage_fields(ctx, texImage,
                               stimg->texture->width0, stimg->texture->height0,
                               1, 0, internalFormat, texFormat);

    pipe_resource_reference(&stObj->pt, stimg->texture);
    st_texture_release_all_sampler_views(st, stObj);
    pipe_resource_reference(&stImage->pt, stObj->pt);
    if (st->pipe->screen->resource_changed)
       st->pipe->screen->resource_changed(st->pipe->screen, stImage->pt);

    stObj->surface_format = stimg->format;
    stObj->level_override = stimg->level;
    stObj->layer_override = stimg->layer;

    _mesa_dirty_texobj(ctx, texObj);
 }

 static void
 st_egl_image_target_texture_2d(struct gl_context *ctx, GLenum target,
 			       struct gl_texture_object *texObj,
 			       struct gl_texture_image *texImage,
 			       GLeglImageOES image_handle)
 {
    struct st_egl_image stimg;

    if (!st_get_egl_image(ctx, image_handle, PIPE_BIND_SAMPLER_VIEW,
                          "glEGLImageTargetTexture2D", &stimg))
       return;

    st_bind_egl_image(ctx, texObj, texImage, &stimg);
    pipe_resource_reference(&stimg.texture, NULL);
 }

 void
 st_init_eglimage_functions(struct dd_function_table *functions)
 {
    functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
    functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
 }
	/*
	* Mesa 3-D graphics library
	*
	* Copyright (C) 2010 LunarG Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included
	* in all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
	* DEALINGS IN THE SOFTWARE.
	*
	* Authors:
	* Chia-I Wu <olv@lunarg.com>
	*/

	#include "main/errors.h"
	#include "main/texobj.h"
	#include "main/teximage.h"
	#include "util/u_inlines.h"
	#include "util/u_format.h"
	#include "st_cb_eglimage.h"
	#include "st_cb_fbo.h"
	#include "st_context.h"
	#include "st_texture.h"
	#include "st_format.h"
	#include "st_manager.h"
	#include "st_sampler_view.h"
	#include "util/u_surface.h"

	static bool
	is_format_supported(struct pipe_screen *screen, enum pipe_format format,
	unsigned nr_samples, unsigned nr_storage_samples,
	unsigned usage)
	{
	bool supported = screen->is_format_supported(screen, format, PIPE_TEXTURE_2D,
	nr_samples, nr_storage_samples,
	usage);

	/* for sampling, some formats can be emulated.. it doesn't matter that
	* the surface will have a format that the driver can't cope with because
	* we'll give it sampler view formats that it can deal with and generate
	* a shader variant that converts.
	*/
	if ((usage == PIPE_BIND_SAMPLER_VIEW) && !supported) {
	if (format == PIPE_FORMAT_IYUV) {
	supported = screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM,
	PIPE_TEXTURE_2D, nr_samples,
	nr_storage_samples, usage);
	} else if (format == PIPE_FORMAT_NV12) {
	supported = screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM,
	PIPE_TEXTURE_2D, nr_samples,
	nr_storage_samples, usage) &&
	screen->is_format_supported(screen, PIPE_FORMAT_R8G8_UNORM,
	PIPE_TEXTURE_2D, nr_samples,
	nr_storage_samples, usage);
	}
	}

	return supported;
	}

	/**
	* Return the gallium texture of an EGLImage.
	*/
	static bool
	st_get_egl_image(struct gl_context *ctx, GLeglImageOES image_handle,
	unsigned usage, const char error, struct st_egl_image out)
	{
	struct st_context *st = st_context(ctx);
	struct pipe_screen *screen = st->pipe->screen;
	struct st_manager *smapi =
	(struct st_manager *) st->iface.st_context_private;

	if (!smapi \|\| !smapi->get_egl_image)
	return false;

	memset(out, 0, sizeof(*out));
	if (!smapi->get_egl_image(smapi, (void *) image_handle, out)) {
	/* image_handle does not refer to a valid EGL image object */
	_mesa_error(ctx, GL_INVALID_VALUE, "%s(image handle not found)", error);
	return false;
	}

	if (!is_format_supported(screen, out->format, out->texture->nr_samples,
	out->texture->nr_storage_samples, usage)) {
	/* unable to specify a texture object using the specified EGL image */
	pipe_resource_reference(&out->texture, NULL);
	_mesa_error(ctx, GL_INVALID_OPERATION, "%s(format not supported)", error);
	return false;
	}

	return true;
	}

	/**
	* Return the base format just like _mesa_base_fbo_format does.
	*/
	static GLenum
	st_pipe_format_to_base_format(enum pipe_format format)
	{
	GLenum base_format;

	if (util_format_is_depth_or_stencil(format)) {
	if (util_format_is_depth_and_stencil(format)) {
	base_format = GL_DEPTH_STENCIL;
	}
	else {
	if (format == PIPE_FORMAT_S8_UINT)
	base_format = GL_STENCIL_INDEX;
	else
	base_format = GL_DEPTH_COMPONENT;
	}
	}
	else {
	/* is this enough? */
	if (util_format_has_alpha(format))
	base_format = GL_RGBA;
	else
	base_format = GL_RGB;
	}

	return base_format;
	}

	static void
	st_egl_image_target_renderbuffer_storage(struct gl_context *ctx,
	struct gl_renderbuffer *rb,
	GLeglImageOES image_handle)
	{
	struct st_renderbuffer *strb = st_renderbuffer(rb);
	struct st_egl_image stimg;

	if (st_get_egl_image(ctx, image_handle, PIPE_BIND_RENDER_TARGET,
	"glEGLImageTargetRenderbufferStorage",
	&stimg)) {
	struct pipe_context *pipe = st_context(ctx)->pipe;
	struct pipe_surface *ps, surf_tmpl;

	u_surface_default_template(&surf_tmpl, stimg.texture);
	surf_tmpl.format = stimg.format;
	surf_tmpl.u.tex.level = stimg.level;
	surf_tmpl.u.tex.first_layer = stimg.layer;
	surf_tmpl.u.tex.last_layer = stimg.layer;
	ps = pipe->create_surface(pipe, stimg.texture, &surf_tmpl);
	pipe_resource_reference(&stimg.texture, NULL);

	if (!ps)
	return;

	strb->Base.Format = st_pipe_format_to_mesa_format(ps->format);
	strb->Base._BaseFormat = st_pipe_format_to_base_format(ps->format);
	strb->Base.InternalFormat = strb->Base._BaseFormat;

	st_set_ws_renderbuffer_surface(strb, ps);
	pipe_surface_reference(&ps, NULL);
	}
	}

	static void
	st_bind_egl_image(struct gl_context *ctx,
	struct gl_texture_object *texObj,
	struct gl_texture_image *texImage,
	struct st_egl_image *stimg)
	{
	struct st_context *st = st_context(ctx);
	struct st_texture_object *stObj;
	struct st_texture_image *stImage;
	GLenum internalFormat;
	mesa_format texFormat;

	/* map pipe format to base format */
	if (util_format_get_component_bits(stimg->format,
	UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)
	internalFormat = GL_RGBA;
	else
	internalFormat = GL_RGB;

	stObj = st_texture_object(texObj);
	stImage = st_texture_image(texImage);

	/* switch to surface based */
	if (!stObj->surface_based) {
	_mesa_clear_texture_object(ctx, texObj, NULL);
	stObj->surface_based = GL_TRUE;
	}

	texFormat = st_pipe_format_to_mesa_format(stimg->format);

	/* TODO RequiredTextureImageUnits should probably be reset back
	* to 1 somewhere if different texture is bound??
	*/
	if (texFormat == MESA_FORMAT_NONE) {
	switch (stimg->format) {
	case PIPE_FORMAT_NV12:
	texFormat = MESA_FORMAT_R_UNORM8;
	texObj->RequiredTextureImageUnits = 2;
	break;
	case PIPE_FORMAT_IYUV:
	texFormat = MESA_FORMAT_R_UNORM8;
	texObj->RequiredTextureImageUnits = 3;
	break;
	default:
	unreachable("bad YUV format!");
	}
	}

	_mesa_init_teximage_fields(ctx, texImage,
	stimg->texture->width0, stimg->texture->height0,
	1, 0, internalFormat, texFormat);

	pipe_resource_reference(&stObj->pt, stimg->texture);
	st_texture_release_all_sampler_views(st, stObj);
	pipe_resource_reference(&stImage->pt, stObj->pt);
	if (st->pipe->screen->resource_changed)
	st->pipe->screen->resource_changed(st->pipe->screen, stImage->pt);

	stObj->surface_format = stimg->format;
	stObj->level_override = stimg->level;
	stObj->layer_override = stimg->layer;

	_mesa_dirty_texobj(ctx, texObj);
	}

	static void
	st_egl_image_target_texture_2d(struct gl_context *ctx, GLenum target,
	struct gl_texture_object *texObj,
	struct gl_texture_image *texImage,
	GLeglImageOES image_handle)
	{
	struct st_egl_image stimg;

	if (!st_get_egl_image(ctx, image_handle, PIPE_BIND_SAMPLER_VIEW,
	"glEGLImageTargetTexture2D", &stimg))
	return;

	st_bind_egl_image(ctx, texObj, texImage, &stimg);
	pipe_resource_reference(&stimg.texture, NULL);
	}

	void
	st_init_eglimage_functions(struct dd_function_table *functions)
	{
	functions->EGLImageTargetTexture2D = st_egl_image_target_texture_2d;
	functions->EGLImageTargetRenderbufferStorage = st_egl_image_target_renderbuffer_storage;
	}