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/**
*
* Compiz group plugin
*
* glow.cpp
*
* Copyright : (C) 2006-2010 by Patrick Niklaus, Roi Cohen,
* Danny Baumann, Sam Spilsbury
* Authors: Patrick Niklaus <patrick.niklaus@googlemail.com>
* Roi Cohen <roico.beryl@gmail.com>
* Danny Baumann <maniac@opencompositing.org>
* Sam Spilsbury <smspillaz@gmail.com>
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
**/
#include "expo.h"
#include "group_glow.h"
const GlowTextureProperties glowTextureProperties = {
/* GlowTextureRectangular */
glowTexRect, 32, 21
};
/*
* GroupWindow::paintGlow
*
* Takes our glow texture, stretches the appropriate positions in the glow texture,
* adds those geometries (so plugins like wobby and deform this texture correctly)
* and then draws the glow texture with this geometry (plugins like wobbly and friends
* will automatically deform the texture based on our set geometry)
*/
void
ExpoWindow::paintGlow (GLFragment::Attrib &attrib,
const CompRegion &paintRegion,
unsigned int mask)
{
CompRegion reg;
int i;
/* There are 8 glow parts of the glow texture which we wish to paint
* separately with different transformations
*/
for (i = 0; i < NUM_GLOWQUADS; i++)
{
/* Using precalculated quads here */
reg = CompRegion (mGlowQuads[i].mBox);
if (reg.boundingRect ().x1 () < reg.boundingRect ().x2 () &&
reg.boundingRect ().y1 () < reg.boundingRect ().y2 ())
{
GLTexture::MatrixList matl;
reg = CompRegion (reg.boundingRect ().x1 (),
reg.boundingRect ().y1 (),
reg.boundingRect ().width (),
reg.boundingRect ().height ());
matl.push_back (mGlowQuads[i].mMatrix);
gWindow->glAddGeometry (matl, reg, paintRegion);
}
}
/* If the geometry add succeeded */
if (gWindow->geometry ().vertices)
{
GLFragment::Attrib fAttrib (attrib);
GLushort average;
GLushort color[3] = {MAXSHORT,
MAXSHORT,
MAXSHORT};
float alpha = (float) ExpoScreen::get (screen)->optionGetSelectedColorAlpha () / 65535.0f;
GLScreen::get (screen)->setTexEnvMode (GL_MODULATE);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4f (((float) ExpoScreen::get (screen)->optionGetSelectedColorRed () / 65535.0f) * alpha,
((float) ExpoScreen::get (screen)->optionGetSelectedColorGreen () / 65535.0f) * alpha,
((float) ExpoScreen::get (screen)->optionGetSelectedColorBlue () / 65535.0f) * alpha,
alpha);
/* we use PAINT_WINDOW_TRANSFORMED_MASK here to force
the usage of a good texture filter */
foreach (GLTexture *tex, ExpoScreen::get (screen)->outline_texture)
{
gWindow->glDrawTexture (tex, fAttrib, mask |
PAINT_WINDOW_BLEND_MASK |
PAINT_WINDOW_TRANSLUCENT_MASK |
PAINT_WINDOW_TRANSFORMED_MASK);
}
glBlendFunc (GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
GLScreen::get (screen)->setTexEnvMode (GL_REPLACE);
glColor4usv (defaultColor);
}
}
/*
* ExpoWindow::computeGlowQuads
*
* This function computures the matrix transformation required for each
* part of the glow texture which we wish to stretch to some rectangular
* dimentions
*
* There are eight quads different parts of the texture which we wish to
* paint here, the 4 sides and four corners, eg:
*
* ------------------
* | 1 | 4 | 6 |
* ------------- ------------------
* | 1 | 4 | 6 | | | | |
* ------------- | | | |
* | 2 | n | 7 | -> | 2 | n | 7 |
* ------------- | | | |
* | 3 | 5 | 8 | | | | |
* ------------- ------------------
* | 3 | 5 | 8 |
* ------------------
*
* In this example here, 2, 4, 5 and 7 are stretched, and the matrices for
* each quad rect adjusted accordingly for it's size compared to the original
* texture size.
*
* When we are adjusting the matrices here, the initial size of each corner has
* a size of of "1.0f", so according to 2x2 matrix rules,
* the scale factor is the inverse of the size of the glow (which explains
* while you will see here that matrix->xx is (1 / glowSize)
* where glowSize is the size the user specifies they want their glow to extend.
* (likewise, matrix->yy is adjusted similarly for corners and for top/bottom)
*
* matrix->x0 and matrix->y0 here are set to be the top left edge of the rect
* adjusted by the matrix scale factor (matrix->xx and matrix->yy)
*
*/
void
ExpoWindow::computeGlowQuads (GLTexture::Matrix *matrix)
{
CompRect *box;
int x1, x2, y1, y2;
GLTexture::Matrix *quadMatrix;
int glowSize, glowOffset;
CompWindow *w = window;
/* Passing NULL to this function frees the glow quads
* (so the window is not painted with glow) */
if (matrix)
{
if (!mGlowQuads)
mGlowQuads = new GlowQuad[NUM_GLOWQUADS];
if (!mGlowQuads)
return;
}
else
{
if (mGlowQuads)
{
delete[] mGlowQuads;
mGlowQuads = NULL;
}
return;
}
glowSize = 48;
glowOffset = (glowSize * ExpoScreen::get (screen)->mGlowTextureProperties->glowOffset /
ExpoScreen::get (screen)->mGlowTextureProperties->textureSize) + 1;
/* Top left corner */
box = &mGlowQuads[GLOWQUAD_TOPLEFT].mBox;
mGlowQuads[GLOWQUAD_TOPLEFT].mMatrix = *matrix;
quadMatrix = &mGlowQuads[GLOWQUAD_TOPLEFT].mMatrix;
/* Set the desired rect dimentions
* for the part of the glow we are painting */
x1 = WIN_REAL_X (w) - glowSize + glowOffset;
y1 = WIN_REAL_Y (w) - glowSize + glowOffset;
/* 2x2 Matrix here, adjust both x and y scale factors
* and the x and y position
*
* Scaling both parts of the texture in a positive direction
* here (left to right top to bottom)
*
* The base position (x0 and y0) here requires us to move backwards
* on the x and y dimentions by the calculated rect dimentions
* multiplied by the scale factors
*/
quadMatrix->xx = 1.0f / glowSize;
quadMatrix->yy = 1.0f / (glowSize);
quadMatrix->x0 = -(x1 * quadMatrix->xx);
quadMatrix->y0 = -(y1 * quadMatrix->yy);
x2 = MIN (WIN_REAL_X (w) + glowOffset,
WIN_REAL_X (w) + (WIN_REAL_WIDTH (w) / 2));
y2 = MIN (WIN_REAL_Y (w) + glowOffset,
WIN_REAL_Y (w) + (WIN_REAL_HEIGHT (w) / 2));
*box = CompRect (x1, y1, x2 - x1, y2 - y1);
/* Top right corner */
box = &mGlowQuads[GLOWQUAD_TOPRIGHT].mBox;
mGlowQuads[GLOWQUAD_TOPRIGHT].mMatrix = *matrix;
quadMatrix = &mGlowQuads[GLOWQUAD_TOPRIGHT].mMatrix;
/* Set the desired rect dimentions
* for the part of the glow we are painting */
x1 = WIN_REAL_X (w) + WIN_REAL_WIDTH (w) - glowOffset;
y1 = WIN_REAL_Y (w) - glowSize + glowOffset;
x2 = WIN_REAL_X (w) + WIN_REAL_WIDTH (w) + glowSize - glowOffset;
/* 2x2 Matrix here, adjust both x and y scale factors
* and the x and y position
*
* Scaling the y part of the texture in a positive direction
* and the x part in a negative direction here
* (right to left top to bottom)
*
* The base position (x0 and y0) here requires us to move backwards
* on the y dimention and forwards on x by the calculated rect dimentions
* multiplied by the scale factors (since we are moving forward on x we
* need the inverse of that which is 1 - x1 * xx
*/
quadMatrix->xx = -1.0f / glowSize;
quadMatrix->yy = 1.0f / glowSize;
quadMatrix->x0 = 1.0 - (x1 * quadMatrix->xx);
quadMatrix->y0 = -(y1 * quadMatrix->yy);
x1 = MAX (WIN_REAL_X (w) + WIN_REAL_WIDTH (w) - glowOffset,
WIN_REAL_X (w) + (WIN_REAL_WIDTH (w) / 2));
y2 = MIN (WIN_REAL_Y (w) + glowOffset,
WIN_REAL_Y (w) + (WIN_REAL_HEIGHT (w) / 2));
*box = CompRect (x1, y1, x2 - x1, y2 - y1);
/* Bottom left corner */
box = &mGlowQuads[GLOWQUAD_BOTTOMLEFT].mBox;
mGlowQuads[GLOWQUAD_BOTTOMLEFT].mMatrix = *matrix;
quadMatrix = &mGlowQuads[GLOWQUAD_BOTTOMLEFT].mMatrix;
x1 = WIN_REAL_X (w) - glowSize + glowOffset;
y1 = WIN_REAL_Y (w) + WIN_REAL_HEIGHT (w) - glowOffset;
x2 = WIN_REAL_X (w) + glowOffset;
y2 = WIN_REAL_Y (w) + WIN_REAL_HEIGHT (w) + glowSize - glowOffset;
/* 2x2 Matrix here, adjust both x and y scale factors
* and the x and y position
*
* Scaling the x part of the texture in a positive direction
* and the y part in a negative direction here
* (left to right bottom to top)
*
* The base position (x0 and y0) here requires us to move backwards
* on the x dimention and forwards on y by the calculated rect dimentions
* multiplied by the scale factors (since we are moving forward on x we
* need the inverse of that which is 1 - y1 * yy
*/
quadMatrix->xx = 1.0f / glowSize;
quadMatrix->yy = -1.0f / glowSize;
quadMatrix->x0 = -(x1 * quadMatrix->xx);
quadMatrix->y0 = 1.0f - (y1 * quadMatrix->yy);
y1 = MAX (WIN_REAL_Y (w) + WIN_REAL_HEIGHT (w) - glowOffset,
WIN_REAL_Y (w) + (WIN_REAL_HEIGHT (w) / 2));
x2 = MIN (WIN_REAL_X (w) + glowOffset,
WIN_REAL_X (w) + (WIN_REAL_WIDTH (w) / 2));
*box = CompRect (x1, y1, x2 - x1, y2 - y1);
/* Bottom right corner */
box = &mGlowQuads[GLOWQUAD_BOTTOMRIGHT].mBox;
mGlowQuads[GLOWQUAD_BOTTOMRIGHT].mMatrix = *matrix;
quadMatrix = &mGlowQuads[GLOWQUAD_BOTTOMRIGHT].mMatrix;
x1 = WIN_REAL_X (w) + WIN_REAL_WIDTH (w) - glowOffset;
y1 = WIN_REAL_Y (w) + WIN_REAL_HEIGHT (w) - glowOffset;
x2 = WIN_REAL_X (w) + WIN_REAL_WIDTH (w) + glowSize - glowOffset;
y2 = WIN_REAL_Y (w) + WIN_REAL_HEIGHT (w) + glowSize - glowOffset;
/* 2x2 Matrix here, adjust both x and y scale factors
* and the x and y position
*
* Scaling the both parts of the texture in a negative direction
* (right to left bottom to top)
*
* The base position (x0 and y0) here requires us to move forwards
* on both dimentions by the calculated rect dimentions
* multiplied by the scale factors
*/
quadMatrix->xx = -1.0f / glowSize;
quadMatrix->yy = -1.0f / glowSize;
quadMatrix->x0 = 1.0 - (x1 * quadMatrix->xx);
quadMatrix->y0 = 1.0 - (y1 * quadMatrix->yy);
x1 = MAX (WIN_REAL_X (w) + WIN_REAL_WIDTH (w) - glowOffset,
WIN_REAL_X (w) + (WIN_REAL_WIDTH (w) / 2));
y1 = MAX (WIN_REAL_Y (w) + WIN_REAL_HEIGHT (w) - glowOffset,
WIN_REAL_Y (w) + (WIN_REAL_HEIGHT (w) / 2));
*box = CompRect (x1, y1, x2 - x1, y2 - y1);
/* Top edge */
box = &mGlowQuads[GLOWQUAD_TOP].mBox;
mGlowQuads[GLOWQUAD_TOP].mMatrix = *matrix;
quadMatrix = &mGlowQuads[GLOWQUAD_TOP].mMatrix;
x1 = WIN_REAL_X (w) + glowOffset;
y1 = WIN_REAL_Y (w) - glowSize + glowOffset;
x2 = WIN_REAL_X (w) + WIN_REAL_WIDTH (w) - glowOffset;
y2 = WIN_REAL_Y (w) + glowOffset;
/* 2x2 Matrix here, adjust both x and y scale factors
* and the x and y position
*
* No need to scale the x part of the texture here, but we
* are scaling on the y part in a positive direciton
*
* The base position (y0) here requires us to move backwards
* on the x dimention and forwards on y by the calculated rect dimentions
* multiplied by the scale factors
*/
quadMatrix->xx = 0.0f;
quadMatrix->yy = 1.0f / glowSize;
quadMatrix->x0 = 1.0;
quadMatrix->y0 = -(y1 * quadMatrix->yy);
*box = CompRect (x1, y1, x2 - x1, y2 - y1);
/* Bottom edge */
box = &mGlowQuads[GLOWQUAD_BOTTOM].mBox;
mGlowQuads[GLOWQUAD_BOTTOM].mMatrix = *matrix;
quadMatrix = &mGlowQuads[GLOWQUAD_BOTTOM].mMatrix;
x1 = WIN_REAL_X (w) + glowOffset;
y1 = WIN_REAL_Y (w) + WIN_REAL_HEIGHT (w) - glowOffset;
x2 = WIN_REAL_X (w) + WIN_REAL_WIDTH (w) - glowOffset;
y2 = WIN_REAL_Y (w) + WIN_REAL_HEIGHT (w) + glowSize - glowOffset;
/* 2x2 Matrix here, adjust both x and y scale factors
* and the x and y position
*
* No need to scale the x part of the texture here, but we
* are scaling on the y part in a negative direciton
*
* The base position (y0) here requires us to move forwards
* on y by the calculated rect dimentions
* multiplied by the scale factors
*/
quadMatrix->xx = 0.0f;
quadMatrix->yy = -1.0f / glowSize;
quadMatrix->x0 = 1.0;
quadMatrix->y0 = 1.0 - (y1 * quadMatrix->yy);
*box = CompRect (x1, y1, x2 - x1, y2 - y1);
/* Left edge */
box = &mGlowQuads[GLOWQUAD_LEFT].mBox;
mGlowQuads[GLOWQUAD_LEFT].mMatrix = *matrix;
quadMatrix = &mGlowQuads[GLOWQUAD_LEFT].mMatrix;
x1 = WIN_REAL_X (w) - glowSize + glowOffset;
y1 = WIN_REAL_Y (w) + glowOffset;
x2 = WIN_REAL_X (w) + glowOffset;
y2 = WIN_REAL_Y (w) + WIN_REAL_HEIGHT (w) - glowOffset;
/* 2x2 Matrix here, adjust both x and y scale factors
* and the x and y position
*
* No need to scale the y part of the texture here, but we
* are scaling on the x part in a positive direciton
*
* The base position (x0) here requires us to move backwards
* on x by the calculated rect dimentions
* multiplied by the scale factors
*/
quadMatrix->xx = 1.0f / glowSize;
quadMatrix->yy = 0.0f;
quadMatrix->x0 = -(x1 * quadMatrix->xx);
quadMatrix->y0 = 1.0;
*box = CompRect (x1, y1, x2 - x1, y2 - y1);
/* Right edge */
box = &mGlowQuads[GLOWQUAD_RIGHT].mBox;
mGlowQuads[GLOWQUAD_RIGHT].mMatrix = *matrix;
quadMatrix = &mGlowQuads[GLOWQUAD_RIGHT].mMatrix;
x1 = WIN_REAL_X (w) + WIN_REAL_WIDTH (w) - glowOffset;
y1 = WIN_REAL_Y (w) + glowOffset;
x2 = WIN_REAL_X (w) + WIN_REAL_WIDTH (w) + glowSize - glowOffset;
y2 = WIN_REAL_Y (w) + WIN_REAL_HEIGHT (w) - glowOffset;
/* 2x2 Matrix here, adjust both x and y scale factors
* and the x and y position
*
* No need to scale the y part of the texture here, but we
* are scaling on the x part in a negative direciton
*
* The base position (x0) here requires us to move forwards
* on x by the calculated rect dimentions
* multiplied by the scale factors
*/
quadMatrix->xx = -1.0f / glowSize;
quadMatrix->yy = 0.0f;
quadMatrix->x0 = 1.0 - (x1 * quadMatrix->xx);
quadMatrix->y0 = 1.0;
*box = CompRect (x1, y1, x2 - x1, y2 - y1);
}
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