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/** OpenGLResources.cc file for the fluxbox compositor. */
// Copyright (c) 2011 Gediminas Liktaras (gliktaras at gmail dot com)
//
// 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.
#include "OpenGLResources.hh"
#include "Logging.hh"
#include "OpenGLScreen.hh"
#include "OpenGLUtility.hh"
#include "Utility.hh"
using namespace FbCompositor;
//--- CONSTANTS ----------------------------------------------------------------
// Attributes of the textures' GLX pixmaps.
const int TEX_PIXMAP_ATTRIBUTES[] = {
#ifdef GLXEW_EXT_texture_from_pixmap
GLX_TEXTURE_TARGET_EXT, GLX_TEXTURE_2D_EXT,
GLX_TEXTURE_FORMAT_EXT, GLX_TEXTURE_FORMAT_RGBA_EXT,
None
#else
None
#endif // GLXEW_EXT_texture_from_pixmap
};
//--- OPENGL BUFFER WRAPPER ----------------------------------------------------
//------- CONSTRUCTORS AND DESTRUCTORS -----------------------------------------
// Constructor.
OpenGLBuffer::OpenGLBuffer(const OpenGLScreen &screen, GLenum target_buffer) :
m_screen(screen) {
m_target = target_buffer;
glGenBuffers(1, &m_buffer);
}
// Destructor.
OpenGLBuffer::~OpenGLBuffer() {
glDeleteBuffers(1, &m_buffer);
}
//------- MUTATORS -------------------------------------------------------------
// Sets the buffer's contents to be the rectangle's coordinates on the screen.
void OpenGLBuffer::bufferPosRectangle(int screen_width, int screen_height, XRectangle rect) {
static GLfloat x_low, x_high, y_low, y_high;
static GLfloat temp_pos_array[8];
toOpenGLCoords(screen_width, screen_height, rect, &x_low, &x_high, &y_low, &y_high);
temp_pos_array[0] = temp_pos_array[4] = x_low;
temp_pos_array[2] = temp_pos_array[6] = x_high;
temp_pos_array[1] = temp_pos_array[3] = y_low;
temp_pos_array[5] = temp_pos_array[7] = y_high;
bufferData(sizeof(temp_pos_array), (const GLvoid*)(temp_pos_array), GL_STATIC_DRAW);
}
//--- OPENGL TEXTURE WRAPPER ---------------------------------------------------
//------- CONSTRUCTORS AND DESTRUCTORS -----------------------------------------
// Constructor.
OpenGL2DTexture::OpenGL2DTexture(const OpenGLScreen &screen, bool swizzle_alpha_to_one) :
m_screen(screen) {
m_display = (Display*)(screen.display());
m_glx_pixmap = 0;
m_pixmap = None;
m_pixmap_managed = false;
glGenTextures(1, &m_texture);
bind();
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
if (swizzle_alpha_to_one) {
#ifdef GL_ARB_texture_swizzle
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_ONE);
#else
#ifdef GL_EXT_texture_swizzle
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A_EXT, GL_ONE);
#endif // GL_EXT_texture_swizzle
#endif // GL_ARB_texture_swizzle
}
}
// Destructor.
OpenGL2DTexture::~OpenGL2DTexture() {
glDeleteTextures(1, &m_texture);
if (m_glx_pixmap) {
glXDestroyPixmap(m_display, m_glx_pixmap);
}
if (m_pixmap_managed && m_pixmap) {
XFreePixmap(m_display, m_pixmap);
}
}
//------- MUTATORS -------------------------------------------------------------
// Sets the texture's contents to the given pixmap.
void OpenGL2DTexture::setPixmap(Pixmap pixmap, bool manage_pixmap, int width, int height, bool force_direct) {
bind();
if (m_pixmap != pixmap) {
#ifdef GLXEW_EXT_texture_from_pixmap
if (m_glx_pixmap) {
glXReleaseTexImageEXT(m_display, m_glx_pixmap, GLX_BACK_LEFT_EXT);
glXDestroyPixmap(m_display, m_glx_pixmap);
m_glx_pixmap = 0;
}
#endif // GLXEW_EXT_texture_from_pixmap
if (m_pixmap_managed && m_pixmap) {
XFreePixmap(m_display, m_pixmap);
m_pixmap = None;
}
}
m_height = height;
m_pixmap_managed = manage_pixmap;
m_pixmap = pixmap;
m_width = width;
#ifdef GLXEW_EXT_texture_from_pixmap
if (!force_direct) {
if (!m_glx_pixmap) {
m_glx_pixmap = glXCreatePixmap(m_display, m_screen.fbConfig(), m_pixmap, TEX_PIXMAP_ATTRIBUTES);
glXBindTexImageEXT(m_display, m_glx_pixmap, GLX_BACK_LEFT_EXT, NULL);
}
} else
#else
MARK_PARAMETER_UNUSED(force_direct);
#endif // GLXEW_EXT_texture_from_pixmap
{
XImage *image = XGetImage(m_display, pixmap, 0, 0, width, height, AllPlanes, ZPixmap);
if (!image) {
fbLog_info << "Could not create XImage for pixmap to texture conversion." << std::endl;
return;
}
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_BGRA, GL_UNSIGNED_BYTE, (void*)(&(image->data[0])));
XDestroyImage(image);
}
}
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