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/*
* 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 usage)
{
bool supported = screen->is_format_supported(screen, format, PIPE_TEXTURE_2D,
nr_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,
usage);
} else if (format == PIPE_FORMAT_NV12) {
supported = screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM,
PIPE_TEXTURE_2D, nr_samples,
usage) &&
screen->is_format_supported(screen, PIPE_FORMAT_R8G8_UNORM,
PIPE_TEXTURE_2D, nr_samples,
usage);
}
}
return supported;
}
/**
* Return the surface of an EGLImage.
* FIXME: I think this should operate on resources, not surfaces
*/
static struct pipe_surface *
st_egl_image_get_surface(struct gl_context *ctx, GLeglImageOES image_handle,
unsigned usage, const char *error)
{
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;
struct st_egl_image stimg;
struct pipe_surface *ps, surf_tmpl;
if (!smapi || !smapi->get_egl_image)
return NULL;
memset(&stimg, 0, sizeof(stimg));
if (!smapi->get_egl_image(smapi, (void *) image_handle, &stimg)) {
/* image_handle does not refer to a valid EGL image object */
_mesa_error(ctx, GL_INVALID_VALUE, "%s(image handle not found)", error);
return NULL;
}
if (!is_format_supported(screen, stimg.format, stimg.texture->nr_samples, usage)) {
/* unable to specify a texture object using the specified EGL image */
_mesa_error(ctx, GL_INVALID_OPERATION, "%s(format not supported)", error);
return NULL;
}
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 = st->pipe->create_surface(st->pipe, stimg.texture, &surf_tmpl);
pipe_resource_reference(&stimg.texture, NULL);
return ps;
}
/**
* 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 pipe_surface *ps;
ps = st_egl_image_get_surface(ctx, image_handle, PIPE_BIND_RENDER_TARGET,
"glEGLImageTargetRenderbufferStorage");
if (ps) {
strb->Base.Width = ps->width;
strb->Base.Height = ps->height;
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;
pipe_surface_reference(&strb->surface, ps);
pipe_resource_reference(&strb->texture, ps->texture);
pipe_surface_reference(&ps, NULL);
}
}
static void
st_bind_surface(struct gl_context *ctx, GLenum target,
struct gl_texture_object *texObj,
struct gl_texture_image *texImage,
struct pipe_surface *ps)
{
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(ps->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);
stObj->surface_based = GL_TRUE;
}
texFormat = st_pipe_format_to_mesa_format(ps->format);
/* TODO RequiredTextureImageUnits should probably be reset back
* to 1 somewhere if different texture is bound??
*/
if (texFormat == MESA_FORMAT_NONE) {
switch (ps->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,
ps->width, ps->height, 1, 0, internalFormat,
texFormat);
/* FIXME create a non-default sampler view from the pipe_surface? */
pipe_resource_reference(&stObj->pt, ps->texture);
st_texture_release_all_sampler_views(st, stObj);
pipe_resource_reference(&stImage->pt, stObj->pt);
stObj->surface_format = ps->format;
_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 pipe_surface *ps;
ps = st_egl_image_get_surface(ctx, image_handle, PIPE_BIND_SAMPLER_VIEW,
"glEGLImageTargetTexture2D");
if (ps) {
st_bind_surface(ctx, target, texObj, texImage, ps);
pipe_surface_reference(&ps, 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;
}
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