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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <EGL/egl.h>
#include <EGL/eglext.h>
extern "C" {
#if defined(GLES2_CONFORM_SUPPORT_ONLY)
#include "gpu/gles2_conform_support/gtf/gtf_stubs.h"
#else
#include "third_party/gles2_conform/GTF_ES/glsl/GTF/Source/eglNative.h" // nogncheck
#endif
EGLImageKHR GTFCreateEGLImage(int width, int height,
GLenum format, GLenum type) {
PFNEGLCREATEIMAGEKHRPROC egl_create_image_khr_;
egl_create_image_khr_ = reinterpret_cast<PFNEGLCREATEIMAGEKHRPROC>
(eglGetProcAddress("eglCreateImageKHR"));
static const EGLint attrib[] = {
EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
EGL_GL_TEXTURE_LEVEL_KHR, 0,
EGL_NONE
};
if (format != GL_RGBA && format != GL_RGB)
return static_cast<EGLImageKHR>(NULL);
if (type != GL_UNSIGNED_BYTE)
return static_cast<EGLImageKHR>(NULL);
GLuint texture;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexImage2D(GL_TEXTURE_2D,
0,
format,
width,
height,
0,
format,
type,
NULL);
// Disable mip-maps because we do not require it.
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
if(glGetError() != GL_NO_ERROR)
return static_cast<EGLImageKHR>(NULL);
EGLImageKHR egl_image =
egl_create_image_khr_(eglGetCurrentDisplay(),
eglGetCurrentContext(),
EGL_GL_TEXTURE_2D_KHR,
reinterpret_cast<EGLClientBuffer>(texture),
attrib);
if (eglGetError() == EGL_SUCCESS)
return egl_image;
else
return static_cast<EGLImageKHR>(NULL);
}
void GTFDestroyEGLImage(EGLImageKHR image) {
PFNEGLDESTROYIMAGEKHRPROC egl_destroy_image_khr_;
egl_destroy_image_khr_ = reinterpret_cast<PFNEGLDESTROYIMAGEKHRPROC>
(eglGetProcAddress("eglDestroyImageKHR"));
egl_destroy_image_khr_(eglGetCurrentDisplay(), image);
}
} // extern "C"
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