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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.
extern "C" {
#include <X11/Xlib.h>
}
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_image_glx.h"
#include "ui/gl/gl_surface_glx.h"
namespace gfx {
namespace {
// scoped_ptr functor for XFree(). Use as follows:
// scoped_ptr<XVisualInfo, ScopedPtrXFree> foo(...);
// where "XVisualInfo" is any X type that is freed with XFree.
struct ScopedPtrXFree {
void operator()(void* x) const { ::XFree(x); }
};
bool ValidFormat(unsigned internalformat) {
switch (internalformat) {
case GL_RGB:
case GL_RGBA:
return true;
default:
return false;
}
}
int TextureFormat(unsigned internalformat) {
switch (internalformat) {
case GL_RGB:
return GLX_TEXTURE_FORMAT_RGB_EXT;
case GL_RGBA:
return GLX_TEXTURE_FORMAT_RGBA_EXT;
default:
NOTREACHED();
return 0;
}
}
int BindToTextureFormat(unsigned internalformat) {
switch (internalformat) {
case GL_RGB:
return GLX_BIND_TO_TEXTURE_RGB_EXT;
case GL_RGBA:
return GLX_BIND_TO_TEXTURE_RGBA_EXT;
default:
NOTREACHED();
return 0;
}
}
unsigned PixmapDepth(unsigned internalformat) {
switch (internalformat) {
case GL_RGBA:
return 32u;
case GL_RGB:
return 24u;
default:
NOTREACHED();
return 0u;
}
}
bool ActualPixmapGeometry(XID pixmap, gfx::Size* size, unsigned* depth) {
XID root_return;
int x_return;
int y_return;
unsigned width_return;
unsigned height_return;
unsigned border_width_return;
unsigned depth_return;
if (!XGetGeometry(gfx::GetXDisplay(),
pixmap,
&root_return,
&x_return,
&y_return,
&width_return,
&height_return,
&border_width_return,
&depth_return))
return false;
if (size)
*size = gfx::Size(width_return, height_return);
if (depth)
*depth = depth_return;
return true;
}
unsigned ActualPixmapDepth(XID pixmap) {
unsigned depth;
if (!ActualPixmapGeometry(pixmap, NULL, &depth))
return -1;
return depth;
}
gfx::Size ActualPixmapSize(XID pixmap) {
gfx::Size size;
if (!ActualPixmapGeometry(pixmap, &size, NULL))
return gfx::Size();
return size;
}
} // namespace anonymous
GLImageGLX::GLImageGLX(const gfx::Size& size, unsigned internalformat)
: glx_pixmap_(0), size_(size), internalformat_(internalformat) {
}
GLImageGLX::~GLImageGLX() {
DCHECK_EQ(0u, glx_pixmap_);
}
bool GLImageGLX::Initialize(XID pixmap) {
if (!GLSurfaceGLX::IsTextureFromPixmapSupported()) {
DVLOG(0) << "GLX_EXT_texture_from_pixmap not supported.";
return false;
}
if (!ValidFormat(internalformat_)) {
DVLOG(0) << "Invalid format: " << internalformat_;
return false;
}
DCHECK_EQ(PixmapDepth(internalformat_), ActualPixmapDepth(pixmap));
DCHECK_EQ(size_.ToString(), ActualPixmapSize(pixmap).ToString());
int config_attribs[] = {
GLX_DRAWABLE_TYPE, GLX_PIXMAP_BIT,
GLX_BIND_TO_TEXTURE_TARGETS_EXT, GLX_TEXTURE_2D_EXT,
BindToTextureFormat(internalformat_), GL_TRUE,
0};
int num_elements = 0;
scoped_ptr<GLXFBConfig, ScopedPtrXFree> config(
glXChooseFBConfig(gfx::GetXDisplay(),
DefaultScreen(gfx::GetXDisplay()),
config_attribs,
&num_elements));
if (!config.get()) {
DVLOG(0) << "glXChooseFBConfig failed.";
return false;
}
if (!num_elements) {
DVLOG(0) << "glXChooseFBConfig returned 0 elements.";
return false;
}
int pixmap_attribs[] = {GLX_TEXTURE_TARGET_EXT, GLX_TEXTURE_2D_EXT,
GLX_TEXTURE_FORMAT_EXT,
TextureFormat(internalformat_), 0};
glx_pixmap_ = glXCreatePixmap(
gfx::GetXDisplay(), *config.get(), pixmap, pixmap_attribs);
if (!glx_pixmap_) {
DVLOG(0) << "glXCreatePixmap failed.";
return false;
}
return true;
}
void GLImageGLX::Destroy(bool have_context) {
if (glx_pixmap_) {
glXDestroyGLXPixmap(gfx::GetXDisplay(), glx_pixmap_);
glx_pixmap_ = 0;
}
}
gfx::Size GLImageGLX::GetSize() { return size_; }
bool GLImageGLX::BindTexImage(unsigned target) {
if (!glx_pixmap_)
return false;
// Requires TEXTURE_2D target.
if (target != GL_TEXTURE_2D)
return false;
glXBindTexImageEXT(gfx::GetXDisplay(), glx_pixmap_, GLX_FRONT_LEFT_EXT, 0);
return true;
}
void GLImageGLX::ReleaseTexImage(unsigned target) {
DCHECK_NE(0u, glx_pixmap_);
DCHECK_EQ(static_cast<GLenum>(GL_TEXTURE_2D), target);
glXReleaseTexImageEXT(gfx::GetXDisplay(), glx_pixmap_, GLX_FRONT_LEFT_EXT);
}
bool GLImageGLX::CopyTexImage(unsigned target) {
return false;
}
bool GLImageGLX::ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
int z_order,
OverlayTransform transform,
const Rect& bounds_rect,
const RectF& crop_rect) {
return false;
}
} // namespace gfx
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