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// Copyright 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 "nine_patch_layer_impl.h"
#include "base/stringprintf.h"
#include "base/values.h"
#include "cc/quad_sink.h"
#include "cc/texture_draw_quad.h"
#include "ui/gfx/rect_f.h"
namespace cc {
NinePatchLayerImpl::NinePatchLayerImpl(LayerTreeImpl* treeImpl, int id)
: LayerImpl(treeImpl, id)
, m_resourceId(0)
{
}
NinePatchLayerImpl::~NinePatchLayerImpl()
{
}
ResourceProvider::ResourceId NinePatchLayerImpl::contentsResourceId() const
{
return 0;
}
void NinePatchLayerImpl::willDraw(ResourceProvider* resourceProvider)
{
}
static gfx::RectF normalizedRect(float x, float y, float width, float height, float totalWidth, float totalHeight)
{
return gfx::RectF(x / totalWidth, y / totalHeight, width / totalWidth, height / totalHeight);
}
void NinePatchLayerImpl::setLayout(const gfx::Size& imageBounds, const gfx::Rect& aperture)
{
m_imageBounds = imageBounds;
m_imageAperture = aperture;
}
void NinePatchLayerImpl::appendQuads(QuadSink& quadSink, AppendQuadsData& appendQuadsData)
{
if (!m_resourceId)
return;
SharedQuadState* sharedQuadState = quadSink.useSharedQuadState(createSharedQuadState());
appendDebugBorderQuad(quadSink, sharedQuadState, appendQuadsData);
static const bool flipped = false;
static const bool premultipliedAlpha = true;
DCHECK(!bounds().IsEmpty());
// NinePatch border widths in bitmap pixel space
int leftWidth = m_imageAperture.x();
int topHeight = m_imageAperture.y();
int rightWidth = m_imageBounds.width() - m_imageAperture.right();
int bottomHeight = m_imageBounds.height() - m_imageAperture.bottom();
// If layer can't fit the corners, clip to show the outer edges of the
// image.
int cornerTotalWidth = leftWidth + rightWidth;
int middleWidth = bounds().width() - cornerTotalWidth;
if (middleWidth < 0) {
float leftWidthProportion = static_cast<float>(leftWidth) / cornerTotalWidth;
int leftWidthCrop = middleWidth * leftWidthProportion;
leftWidth += leftWidthCrop;
rightWidth = bounds().width() - leftWidth;
middleWidth = 0;
}
int cornerTotalHeight = topHeight + bottomHeight;
int middleHeight = bounds().height() - cornerTotalHeight;
if (middleHeight < 0) {
float topHeightProportion = static_cast<float>(topHeight) / cornerTotalHeight;
int topHeightCrop = middleHeight * topHeightProportion;
topHeight += topHeightCrop;
bottomHeight = bounds().height() - topHeight;
middleHeight = 0;
}
// Patch positions in layer space
gfx::Rect topLeft(0, 0, leftWidth, topHeight);
gfx::Rect topRight(bounds().width() - rightWidth, 0, rightWidth, topHeight);
gfx::Rect bottomLeft(0, bounds().height() - bottomHeight, leftWidth, bottomHeight);
gfx::Rect bottomRight(topRight.x(), bottomLeft.y(), rightWidth, bottomHeight);
gfx::Rect top(topLeft.right(), 0, middleWidth, topHeight);
gfx::Rect left(0, topLeft.bottom(), leftWidth, middleHeight);
gfx::Rect right(topRight.x(), topRight.bottom(), rightWidth, left.height());
gfx::Rect bottom(top.x(), bottomLeft.y(), top.width(), bottomHeight);
float imgWidth = m_imageBounds.width();
float imgHeight = m_imageBounds.height();
// Patch positions in bitmap UV space (from zero to one)
gfx::RectF uvTopLeft = normalizedRect(0, 0, leftWidth, topHeight, imgWidth, imgHeight);
gfx::RectF uvTopRight = normalizedRect(imgWidth - rightWidth, 0, rightWidth, topHeight, imgWidth, imgHeight);
gfx::RectF uvBottomLeft = normalizedRect(0, imgHeight - bottomHeight, leftWidth, bottomHeight, imgWidth, imgHeight);
gfx::RectF uvBottomRight = normalizedRect(imgWidth - rightWidth, imgHeight - bottomHeight, rightWidth, bottomHeight, imgWidth, imgHeight);
gfx::RectF uvTop(uvTopLeft.right(), 0, (imgWidth - leftWidth - rightWidth) / imgWidth, (topHeight) / imgHeight);
gfx::RectF uvLeft(0, uvTopLeft.bottom(), leftWidth / imgWidth, (imgHeight - topHeight - bottomHeight) / imgHeight);
gfx::RectF uvRight(uvTopRight.x(), uvTopRight.bottom(), rightWidth / imgWidth, uvLeft.height());
gfx::RectF uvBottom(uvTop.x(), uvBottomLeft.y(), uvTop.width(), bottomHeight / imgHeight);
// Nothing is opaque here.
// TODO(danakj): Should we look at the SkBitmaps to determine opaqueness?
gfx::Rect opaqueRect;
const float vertex_opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
scoped_ptr<TextureDrawQuad> quad;
quad = TextureDrawQuad::Create();
quad->SetNew(sharedQuadState, topLeft, opaqueRect, m_resourceId, premultipliedAlpha, uvTopLeft.origin(), uvTopLeft.bottom_right(), vertex_opacity, flipped);
quadSink.append(quad.PassAs<DrawQuad>(), appendQuadsData);
quad = TextureDrawQuad::Create();
quad->SetNew(sharedQuadState, topRight, opaqueRect, m_resourceId, premultipliedAlpha, uvTopRight.origin(), uvTopRight.bottom_right(), vertex_opacity, flipped);
quadSink.append(quad.PassAs<DrawQuad>(), appendQuadsData);
quad = TextureDrawQuad::Create();
quad->SetNew(sharedQuadState, bottomLeft, opaqueRect, m_resourceId, premultipliedAlpha, uvBottomLeft.origin(), uvBottomLeft.bottom_right(), vertex_opacity, flipped);
quadSink.append(quad.PassAs<DrawQuad>(), appendQuadsData);
quad = TextureDrawQuad::Create();
quad->SetNew(sharedQuadState, bottomRight, opaqueRect, m_resourceId, premultipliedAlpha, uvBottomRight.origin(), uvBottomRight.bottom_right(), vertex_opacity, flipped);
quadSink.append(quad.PassAs<DrawQuad>(), appendQuadsData);
quad = TextureDrawQuad::Create();
quad->SetNew(sharedQuadState, top, opaqueRect, m_resourceId, premultipliedAlpha, uvTop.origin(), uvTop.bottom_right(), vertex_opacity, flipped);
quadSink.append(quad.PassAs<DrawQuad>(), appendQuadsData);
quad = TextureDrawQuad::Create();
quad->SetNew(sharedQuadState, left, opaqueRect, m_resourceId, premultipliedAlpha, uvLeft.origin(), uvLeft.bottom_right(), vertex_opacity, flipped);
quadSink.append(quad.PassAs<DrawQuad>(), appendQuadsData);
quad = TextureDrawQuad::Create();
quad->SetNew(sharedQuadState, right, opaqueRect, m_resourceId, premultipliedAlpha, uvRight.origin(), uvRight.bottom_right(), vertex_opacity, flipped);
quadSink.append(quad.PassAs<DrawQuad>(), appendQuadsData);
quad = TextureDrawQuad::Create();
quad->SetNew(sharedQuadState, bottom, opaqueRect, m_resourceId, premultipliedAlpha, uvBottom.origin(), uvBottom.bottom_right(), vertex_opacity, flipped);
quadSink.append(quad.PassAs<DrawQuad>(), appendQuadsData);
}
void NinePatchLayerImpl::didDraw(ResourceProvider* resourceProvider)
{
}
void NinePatchLayerImpl::didLoseOutputSurface()
{
m_resourceId = 0;
}
const char* NinePatchLayerImpl::layerTypeAsString() const
{
return "NinePatchLayer";
}
void NinePatchLayerImpl::dumpLayerProperties(std::string* str, int indent) const
{
str->append(indentString(indent));
base::StringAppendF(str, "imageAperture: %s\n", m_imageAperture.ToString().c_str());
LayerImpl::dumpLayerProperties(str, indent);
}
base::DictionaryValue* NinePatchLayerImpl::layerTreeAsJson() const
{
base::DictionaryValue* result = LayerImpl::layerTreeAsJson();
base::ListValue* list = new base::ListValue;
list->AppendInteger(m_imageAperture.origin().x());
list->AppendInteger(m_imageAperture.origin().y());
list->AppendInteger(m_imageAperture.size().width());
list->AppendInteger(m_imageAperture.size().height());
result->Set("ImageAperture", list);
return result;
}
}
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