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// Copyright (c) 2011 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 "pdf/progress_control.h"
#include <algorithm>
#include "base/logging.h"
#include "pdf/draw_utils.h"
#include "pdf/resource_consts.h"
#include "ppapi/cpp/dev/font_dev.h"
namespace chrome_pdf {
const double ProgressControl::kCompleted = 100.0;
// There is a bug outputting text with alpha 0xFF (opaque) to an intermediate
// image. It outputs alpha channgel of the text pixels to 0xFF (transparent).
// And it breaks next alpha blending.
// For now, let's use alpha 0xFE to work around this bug.
// TODO(gene): investigate this bug.
const uint32 kProgressTextColor = 0xFEDDE6FC;
const uint32 kProgressTextSize = 16;
const uint32 kImageTextSpacing = 8;
const uint32 kTopPadding = 8;
const uint32 kBottomPadding = 12;
const uint32 kLeftPadding = 10;
const uint32 kRightPadding = 10;
int ScaleInt(int val, float scale) {
return static_cast<int>(val * scale);
}
ProgressControl::ProgressControl()
: progress_(0.0),
device_scale_(1.0) {
}
ProgressControl::~ProgressControl() {
}
bool ProgressControl::CreateProgressControl(
uint32 id,
bool visible,
Control::Owner* delegate,
double progress,
float device_scale,
const std::vector<pp::ImageData>& images,
const pp::ImageData& background,
const std::string& text) {
progress_ = progress;
text_ = text;
bool res = Control::Create(id, pp::Rect(), visible, delegate);
if (res)
Reconfigure(background, images, device_scale);
return res;
}
void ProgressControl::Reconfigure(const pp::ImageData& background,
const std::vector<pp::ImageData>& images,
float device_scale) {
DCHECK(images.size() != 0);
images_ = images;
background_ = background;
device_scale_ = device_scale;
pp::Size ctrl_size;
CalculateLayout(owner()->GetInstance(), images_, background_, text_,
device_scale_, &ctrl_size, &image_rc_, &text_rc_);
pp::Rect rc(pp::Point(), ctrl_size);
Control::SetRect(rc, false);
PrepareBackground();
}
// static
void ProgressControl::CalculateLayout(pp::Instance* instance,
const std::vector<pp::ImageData>& images,
const pp::ImageData& background,
const std::string& text,
float device_scale,
pp::Size* ctrl_size,
pp::Rect* image_rc,
pp::Rect* text_rc) {
DCHECK(images.size() != 0);
int image_width = 0;
int image_height = 0;
for (size_t i = 0; i < images.size(); i++) {
image_width = std::max(image_width, images[i].size().width());
image_height = std::max(image_height, images[i].size().height());
}
pp::FontDescription_Dev description;
description.set_family(PP_FONTFAMILY_SANSSERIF);
description.set_size(ScaleInt(kProgressTextSize, device_scale));
description.set_weight(PP_FONTWEIGHT_BOLD);
pp::Font_Dev font(instance, description);
int text_length = font.MeasureSimpleText(text);
pp::FontDescription_Dev desc;
PP_FontMetrics_Dev metrics;
font.Describe(&desc, &metrics);
int text_height = metrics.height;
*ctrl_size = pp::Size(
image_width + text_length +
ScaleInt(kImageTextSpacing + kLeftPadding + kRightPadding, device_scale),
std::max(image_height, text_height) +
ScaleInt(kTopPadding + kBottomPadding, device_scale));
int offset_x = 0;
int offset_y = 0;
if (ctrl_size->width() < background.size().width()) {
offset_x += (background.size().width() - ctrl_size->width()) / 2;
ctrl_size->set_width(background.size().width());
}
if (ctrl_size->height() < background.size().height()) {
offset_y += (background.size().height() - ctrl_size->height()) / 2;
ctrl_size->set_height(background.size().height());
}
*image_rc = pp::Rect(ScaleInt(kLeftPadding, device_scale) + offset_x,
ScaleInt(kTopPadding, device_scale) + offset_y,
image_width,
image_height);
*text_rc = pp::Rect(
ctrl_size->width() - text_length -
ScaleInt(kRightPadding, device_scale) - offset_x,
(ctrl_size->height() - text_height) / 2,
text_length,
text_height);
}
size_t ProgressControl::GetImageIngex() const {
return static_cast<size_t>((progress_ / 100.0) * images_.size());
}
void ProgressControl::Paint(pp::ImageData* image_data, const pp::Rect& rc) {
if (!visible())
return;
pp::Rect draw_rc = rect().Intersect(rc);
if (draw_rc.IsEmpty())
return;
pp::ImageData buffer(owner()->GetInstance(), ctrl_background_.format(),
ctrl_background_.size(), false);
CopyImage(ctrl_background_, pp::Rect(ctrl_background_.size()),
&buffer, pp::Rect(ctrl_background_.size()), false);
size_t index = GetImageIngex();
if (index >= images_.size())
index = images_.size() - 1;
AlphaBlend(images_[index],
pp::Rect(images_[index].size()),
&buffer,
image_rc_.point(),
kOpaqueAlpha);
pp::Rect image_draw_rc(draw_rc);
image_draw_rc.Offset(-rect().x(), -rect().y());
AlphaBlend(buffer,
image_draw_rc,
image_data,
draw_rc.point(),
transparency());
}
void ProgressControl::SetProgress(double progress) {
size_t old_index = GetImageIngex();
progress_ = progress;
size_t new_index = GetImageIngex();
if (progress_ >= kCompleted) {
progress_ = kCompleted;
owner()->OnEvent(id(), EVENT_ID_PROGRESS_COMPLETED, NULL);
}
if (visible() && old_index != new_index)
owner()->Invalidate(id(), rect());
}
void ProgressControl::PrepareBackground() {
AdjustBackground();
pp::FontDescription_Dev description;
description.set_family(PP_FONTFAMILY_SANSSERIF);
description.set_size(ScaleInt(kProgressTextSize, device_scale_));
description.set_weight(PP_FONTWEIGHT_BOLD);
pp::Font_Dev font(owner()->GetInstance(), description);
pp::FontDescription_Dev desc;
PP_FontMetrics_Dev metrics;
font.Describe(&desc, &metrics);
pp::Point text_origin = pp::Point(text_rc_.x(),
(text_rc_.y() + text_rc_.bottom() + metrics.x_height) / 2);
font.DrawTextAt(&ctrl_background_, pp::TextRun_Dev(text_), text_origin,
kProgressTextColor, pp::Rect(ctrl_background_.size()), false);
}
void ProgressControl::AdjustBackground() {
ctrl_background_ = pp::ImageData(owner()->GetInstance(),
PP_IMAGEDATAFORMAT_BGRA_PREMUL,
rect().size(),
false);
if (rect().size() == background_.size()) {
CopyImage(background_, pp::Rect(background_.size()),
&ctrl_background_, pp::Rect(ctrl_background_.size()), false);
return;
}
// We need to stretch background to new dimentions. To do so, we split
// background into 9 different parts. We copy corner rects (1,3,7,9) as is,
// stretch rectangles between corners (2,4,6,8) in 1 dimention, and
// stretch center rect (5) in 2 dimentions.
// |---|---|---|
// | 1 | 2 | 3 |
// |---|---|---|
// | 4 | 5 | 6 |
// |---|---|---|
// | 7 | 8 | 9 |
// |---|---|---|
int slice_x = background_.size().width() / 3;
int slice_y = background_.size().height() / 3;
// Copy rect 1
pp::Rect src_rc(0, 0, slice_x, slice_y);
pp::Rect dest_rc(0, 0, slice_x, slice_y);
CopyImage(background_, src_rc, &ctrl_background_, dest_rc, false);
// Copy rect 3
src_rc.set_x(background_.size().width() - slice_x);
dest_rc.set_x(ctrl_background_.size().width() - slice_x);
CopyImage(background_, src_rc, &ctrl_background_, dest_rc, false);
// Copy rect 9
src_rc.set_y(background_.size().height() - slice_y);
dest_rc.set_y(ctrl_background_.size().height() - slice_y);
CopyImage(background_, src_rc, &ctrl_background_, dest_rc, false);
// Copy rect 7
src_rc.set_x(0);
dest_rc.set_x(0);
CopyImage(background_, src_rc, &ctrl_background_, dest_rc, false);
// Stretch rect 2
src_rc = pp::Rect(
slice_x, 0, background_.size().width() - 2 * slice_x, slice_y);
dest_rc = pp::Rect(
slice_x, 0, ctrl_background_.size().width() - 2 * slice_x, slice_y);
CopyImage(background_, src_rc, &ctrl_background_, dest_rc, true);
// Copy rect 8
src_rc.set_y(background_.size().height() - slice_y);
dest_rc.set_y(ctrl_background_.size().height() - slice_y);
CopyImage(background_, src_rc, &ctrl_background_, dest_rc, true);
// Stretch rect 4
src_rc = pp::Rect(
0, slice_y, slice_x, background_.size().height() - 2 * slice_y);
dest_rc = pp::Rect(
0, slice_y, slice_x, ctrl_background_.size().height() - 2 * slice_y);
CopyImage(background_, src_rc, &ctrl_background_, dest_rc, true);
// Copy rect 6
src_rc.set_x(background_.size().width() - slice_x);
dest_rc.set_x(ctrl_background_.size().width() - slice_x);
CopyImage(background_, src_rc, &ctrl_background_, dest_rc, true);
// Stretch rect 5
src_rc = pp::Rect(slice_x,
slice_y,
background_.size().width() - 2 * slice_x,
background_.size().height() - 2 * slice_y);
dest_rc = pp::Rect(slice_x,
slice_y,
ctrl_background_.size().width() - 2 * slice_x,
ctrl_background_.size().height() - 2 * slice_y);
CopyImage(background_, src_rc, &ctrl_background_, dest_rc, true);
}
} // namespace chrome_pdf