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/*
* Copyright 2011, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define LOG_TAG "GLExtras"
#define LOG_NDEBUG 1
#include "config.h"
#include "AndroidLog.h"
#include "DrawExtra.h"
#include "GLExtras.h"
#include "IntRect.h"
#include "SkPath.h"
#include "TilesManager.h"
#include "android_graphics.h"
// Touch ring border width. This is doubled if the ring is not pressed
#define RING_BORDER_WIDTH 1
GLExtras::GLExtras()
: m_drawExtra(0)
, m_viewport()
{
}
GLExtras::~GLExtras()
{
}
void GLExtras::drawRing(SkRect& srcRect, Color color, const TransformationMatrix* drawMat)
{
if (srcRect.fRight <= srcRect.fLeft || srcRect.fBottom <= srcRect.fTop) {
// Invalid rect, reject it
return;
}
ALOGV("drawQuad [%fx%f, %f, %f]", srcRect.fLeft, srcRect.fTop,
srcRect.width(), srcRect.height());
// Pull the alpha out of the color so that the shader applies it correctly.
// Otherwise we either don't have blending enabled, or the alpha will get
// double applied
Color colorWithoutAlpha(0xFF000000 | color.rgb());
float alpha = color.alpha() / (float) 255;
if (drawMat) {
TilesManager::instance()->shader()->drawLayerQuad(*drawMat, srcRect, 0,
alpha, false, 0, colorWithoutAlpha);
} else
TilesManager::instance()->shader()->drawQuad(srcRect, 0, alpha, colorWithoutAlpha);
}
void GLExtras::drawRegion(const SkRegion& region, bool fill, bool drawBorder,
const TransformationMatrix* drawMat, Color color)
{
if (region.isEmpty())
return;
if (fill) {
SkRegion::Iterator rgnIter(region);
while (!rgnIter.done()) {
const SkIRect& ir = rgnIter.rect();
SkRect r;
r.set(ir.fLeft, ir.fTop, ir.fRight, ir.fBottom);
drawRing(r, color, drawMat);
rgnIter.next();
}
}
if (fill && !drawBorder)
return;
SkPath path;
if (!region.getBoundaryPath(&path))
return;
SkPath::Iter iter(path, true);
SkPath::Verb verb;
SkPoint pts[4];
SkRegion clip;
SkIRect startRect;
while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
if (verb == SkPath::kLine_Verb) {
SkRect r;
r.set(pts, 2);
SkIRect line;
int borderWidth = RING_BORDER_WIDTH;
if (!fill)
borderWidth *= 2;
line.fLeft = r.fLeft - borderWidth;
line.fRight = r.fRight + borderWidth;
line.fTop = r.fTop - borderWidth;
line.fBottom = r.fBottom + borderWidth;
if (clip.intersects(line)) {
clip.op(line, SkRegion::kReverseDifference_Op);
if (clip.isEmpty())
continue; // Nothing to draw, continue
line = clip.getBounds();
if (SkIRect::Intersects(startRect, line)) {
clip.op(startRect, SkRegion::kDifference_Op);
if (clip.isEmpty())
continue; // Nothing to draw, continue
line = clip.getBounds();
}
} else {
clip.setRect(line);
}
r.set(line.fLeft, line.fTop, line.fRight, line.fBottom);
drawRing(r, color, drawMat);
if (startRect.isEmpty()) {
startRect.set(line.fLeft, line.fTop, line.fRight, line.fBottom);
}
}
if (verb == SkPath::kMove_Verb) {
startRect.setEmpty();
}
}
}
void GLExtras::drawGL(const LayerAndroid* layer)
{
if (m_drawExtra)
m_drawExtra->drawGL(this, layer);
}
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