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/*********************************************************************
*
* Copyright 2012 Intel Corporation
* All Rights Reserved.
*
* 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.
*
*********************************************************************/
/*
* Auxiliary functions to compute the size of array/blob arguments.
*/
#ifndef _WIN32
#include <string.h>
#include "os_thread.hpp"
#include "glimports.hpp"
#include "glproc.hpp"
#include "glsize.hpp"
#include "eglsize.hpp"
#include "assert.h"
static int
bisect_val(int min, int max, bool is_valid_val(int val))
{
bool valid;
while (1) {
int try_val = min + (max - min + 1) / 2;
valid = is_valid_val(try_val);
if (min == max)
break;
if (valid)
min = try_val;
else
max = try_val - 1;
}
return valid ? min : -1;
}
static bool
is_valid_width(int val)
{
_glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, val, 1);
return _glGetError() == GL_NO_ERROR;
}
static bool
is_valid_height(int val)
{
_glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, 1, val);
return _glGetError() == GL_NO_ERROR;
}
static int
detect_size(int *width_ret, int *height_ret)
{
GLint max_tex_size;
int width;
int height;
max_tex_size = 0;
_glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_tex_size);
width = bisect_val(1, max_tex_size, is_valid_width);
if (width < 0)
return -1;
height = bisect_val(1, max_tex_size, is_valid_height);
if (height < 0)
return -1;
*width_ret = width;
*height_ret = height;
return 0;
}
/* XXX */
static inline bool
can_unpack_subimage(void) {
return false;
}
static void
_eglCreateImageKHR_get_image_size(EGLImageKHR image, image_info *info)
{
GLuint fbo = 0;
GLuint orig_fbo = 0;
GLuint texture = 0;
GLuint orig_texture;
GLenum status;
_glGetIntegerv(GL_FRAMEBUFFER_BINDING, (GLint *)&orig_fbo);
_glGenFramebuffers(1, &fbo);
_glBindFramebuffer(GL_FRAMEBUFFER, fbo);
_glGetIntegerv(GL_TEXTURE_BINDING_2D, (GLint *)&orig_texture);
_glGenTextures(1, &texture);
_glBindTexture(GL_TEXTURE_2D, texture);
_glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
info->width = 0;
info->height = 0;
_glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, texture, 0);
status = _glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status == GL_FRAMEBUFFER_COMPLETE) {
if (detect_size(&info->width, &info->height) != 0)
os::log("%s: can't detect image size\n", __func__);
} else {
os::log("%s: error: %x\n", __func__, status);
}
/* Don't leak errors to the traced application. */
(void)_glGetError();
_glBindTexture(GL_TEXTURE_2D, orig_texture);
_glDeleteTextures(1, &texture);
_glBindFramebuffer(GL_FRAMEBUFFER, orig_fbo);
_glDeleteFramebuffers(1, &fbo);
}
static void
get_texture_2d_image(image_info *info)
{
GLuint fbo = 0;
GLint prev_fbo = 0;
GLint texture;
GLenum status;
_glGetIntegerv(GL_TEXTURE_BINDING_2D, &texture);
if (!texture)
return;
_glGetIntegerv(GL_FRAMEBUFFER_BINDING, &prev_fbo);
_glGenFramebuffers(1, &fbo);
_glBindFramebuffer(GL_FRAMEBUFFER, fbo);
_glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
texture, 0);
status = _glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
os::log("%s: error: %d\n", __func__, status);
_glReadPixels(0, 0, info->width, info->height, info->format, info->type, info->pixels);
/* Don't leak errors to the traced application. */
(void)_glGetError();
_glBindFramebuffer(GL_FRAMEBUFFER, prev_fbo);
_glDeleteFramebuffers(1, &fbo);
}
struct image_info *
_EGLImageKHR_get_image_info(GLenum target, EGLImageKHR image)
{
GLuint tex;
GLint bound_tex = 0;
struct image_info *info;
info = new image_info;
memset(info, 0, sizeof *info);
info->internalformat = GL_RGBA;
info->format = GL_RGBA;
info->type = GL_UNSIGNED_BYTE;
_eglCreateImageKHR_get_image_size(image, info);
_glGenTextures(1, &tex);
_glGetIntegerv(GL_TEXTURE_BINDING_2D, &bound_tex);
_glBindTexture(GL_TEXTURE_2D, tex);
_glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
info->size = _glTexImage2D_size(info->format, info->type, info->width, info->height);
info->pixels = malloc(info->size);
get_texture_2d_image(info);
_glBindTexture(GL_TEXTURE_2D, bound_tex);
_glDeleteBuffers(1, &tex);
return info;
}
void
_EGLImageKHR_free_image_info(struct image_info *info)
{
free(info->pixels);
delete info;
}
#endif // !defined(_WIN32)
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