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/*
* Copyright © 2012 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Zhigang Gong <zhigang.gong@intel.com>
*/
#include <GL/gl.h>
#include <GL/glext.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <assert.h>
#include <stdio.h>
#include "cl_mem.h"
#include "cl_image.h"
#include "cl_context.h"
#include "cl_utils.h"
#include "cl_alloc.h"
#include "cl_device_id.h"
#include "cl_driver.h"
#include "cl_platform_id.h"
#include "cl_mem_gl.h"
#include "CL/cl.h"
#include "CL/cl_intel.h"
#include "CL/cl_gl.h"
#ifndef CL_VERSION_1_2
#define CL_INVALID_IMAGE_DESCRIPTOR -65
#endif
static int cl_get_clformat_from_texture(GLint tex_format, cl_image_format * cl_format)
{
cl_int ret = CL_SUCCESS;
switch (tex_format) {
case GL_RGBA8:
case GL_RGBA:
case GL_RGBA16:
case GL_RGBA8I:
case GL_RGBA16I:
case GL_RGBA32I:
case GL_RGBA8UI:
case GL_RGBA16UI:
case GL_RGBA32UI:
case GL_RGBA16F:
case GL_RGBA32F:
cl_format->image_channel_order = CL_RGBA;
break;
case GL_BGRA:
cl_format->image_channel_order = CL_BGRA;
break;
default:
ret = CL_INVALID_IMAGE_DESCRIPTOR;
goto error;
}
switch (tex_format) {
case GL_RGBA8:
case GL_RGBA:
case GL_BGRA:
cl_format->image_channel_data_type = CL_UNORM_INT8;
break;
case GL_RGBA16:
cl_format->image_channel_data_type = CL_UNORM_INT16;
break;
case GL_RGBA8I:
cl_format->image_channel_data_type = CL_SIGNED_INT8;
break;
case GL_RGBA16I:
cl_format->image_channel_data_type = CL_SIGNED_INT16;
break;
case GL_RGBA32I:
cl_format->image_channel_data_type = CL_SIGNED_INT32;
break;
case GL_RGBA8UI:
cl_format->image_channel_data_type = CL_UNSIGNED_INT8;
break;
case GL_RGBA16UI:
cl_format->image_channel_data_type = CL_UNSIGNED_INT16;
break;
case GL_RGBA32UI:
cl_format->image_channel_data_type = CL_UNSIGNED_INT32;
break;
case GL_RGBA16F:
cl_format->image_channel_data_type = CL_HALF_FLOAT;
break;
case GL_RGBA32F:
cl_format->image_channel_order = CL_FLOAT;
break;
default:
ret = CL_INVALID_IMAGE_DESCRIPTOR;
goto error;
}
error:
return ret;
}
static cl_mem_object_type
get_mem_type_from_target(GLenum texture_target, cl_mem_object_type *type)
{
switch(texture_target) {
case GL_TEXTURE_1D: *type = CL_MEM_OBJECT_IMAGE1D; break;
case GL_TEXTURE_2D: *type = CL_MEM_OBJECT_IMAGE2D; break;
case GL_TEXTURE_3D: *type = CL_MEM_OBJECT_IMAGE3D; break;
case GL_TEXTURE_1D_ARRAY: *type = CL_MEM_OBJECT_IMAGE1D_ARRAY; break;
case GL_TEXTURE_2D_ARRAY: *type = CL_MEM_OBJECT_IMAGE2D_ARRAY; break;
default:
return -1;
}
return 0;
}
LOCAL cl_mem
cl_mem_new_gl_buffer(cl_context ctx,
cl_mem_flags flags,
GLuint buf_obj,
cl_int *errcode_ret)
{
NOT_IMPLEMENTED;
}
static EGLImageKHR
cl_create_textured_egl_image(cl_context ctx,
GLenum texture_target,
GLint miplevel,
GLuint texture)
{
struct cl_gl_ext_deps *egl_funcs;
EGLDisplay egl_display;
EGLContext egl_context;
EGLint egl_attribs[] = { EGL_GL_TEXTURE_LEVEL_KHR, miplevel, EGL_NONE};
assert(ctx->props.gl_type == CL_GL_EGL_DISPLAY);
egl_funcs = CL_EXTENSION_GET_FUNCS(ctx, khr_gl_sharing, gl_ext_deps);
assert(egl_funcs != NULL);
egl_display = (EGLDisplay)ctx->props.egl_display;
egl_context = (EGLDisplay)ctx->props.gl_context;
return egl_funcs->eglCreateImageKHR_func(egl_display, egl_context,
EGL_GL_TEXTURE_2D_KHR,
(EGLClientBuffer)(uintptr_t)texture,
&egl_attribs[0]);
}
LOCAL cl_mem
cl_mem_new_gl_texture(cl_context ctx,
cl_mem_flags flags,
GLenum texture_target,
GLint miplevel,
GLuint texture,
cl_int *errcode_ret)
{
cl_int err = CL_SUCCESS;
cl_mem mem = NULL;
EGLImageKHR egl_image;
int w, h, pitch, tiling;
unsigned int bpp, intel_fmt;
cl_image_format cl_format;
unsigned int gl_format;
/* Check flags consistency */
if (UNLIKELY(flags & CL_MEM_COPY_HOST_PTR)) {
err = CL_INVALID_ARG_VALUE;
goto error;
}
mem = cl_mem_allocate(CL_MEM_IMAGE_TYPE, ctx, flags, 0, 0, errcode_ret);
if (mem == NULL) {
err = CL_OUT_OF_HOST_MEMORY;
goto error;
}
egl_image = cl_create_textured_egl_image(ctx, texture_target, miplevel, texture);
if (egl_image == NULL) {
err = CL_INVALID_GL_OBJECT;
goto error;
}
mem->bo = cl_buffer_alloc_from_eglimage(ctx, (void*)egl_image, &gl_format, &w, &h, &pitch, &tiling);
if (UNLIKELY(mem->bo == NULL)) {
err = CL_MEM_OBJECT_ALLOCATION_FAILURE;
goto error;
}
cl_get_clformat_from_texture(gl_format, &cl_format);
/* XXX Maybe we'd better to check the hw format in driver? */
intel_fmt = cl_image_get_intel_format(&cl_format);
if (intel_fmt == INTEL_UNSUPPORTED_FORMAT) {
err = CL_INVALID_IMAGE_DESCRIPTOR;
goto error;
}
cl_image_byte_per_pixel(&cl_format, &bpp);
cl_mem_object_type image_type;
if (get_mem_type_from_target(texture_target, &image_type) != 0) {
err = CL_INVALID_IMAGE_DESCRIPTOR;
goto error;
}
cl_mem_image_init(cl_mem_image(mem), w, h, image_type, 1, cl_format, intel_fmt, bpp, pitch, 0, tiling);
cl_mem_image(mem)->egl_image = egl_image;
exit:
if (errcode_ret)
*errcode_ret = err;
return mem;
error:
cl_mem_delete(mem);
mem = NULL;
goto exit;
}
LOCAL void cl_mem_gl_delete(struct _cl_mem_image *image)
{
struct cl_gl_ext_deps *egl_funcs;
EGLDisplay egl_display = (EGLDisplay)image->base.ctx->props.egl_display;
egl_funcs = CL_EXTENSION_GET_FUNCS(image->base.ctx, khr_gl_sharing, gl_ext_deps);
egl_funcs->eglDestroyImageKHR_func(egl_display, image->egl_image);
}
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