Move src/gfx/ to src/ui/gfx...

gfx/blit.cc

-// Copyright (c) 2009 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 "gfx/blit.h"
-
-#include "base/logging.h"
-#include "build/build_config.h"
-#include "gfx/point.h"
-#include "gfx/rect.h"
-#include "skia/ext/platform_canvas.h"
-#include "skia/ext/platform_device.h"
-
-#if defined(OS_POSIX) && !defined(OS_MACOSX)
-#include <cairo/cairo.h>
-#endif
-
-#if defined(OS_MACOSX)
-#include "base/mac/scoped_cftyperef.h"
-#endif
-
-namespace gfx {
-
-namespace {
-
-// Returns true if the given canvas has any part of itself clipped out or
-// any non-identity tranform.
-bool HasClipOrTransform(const skia::PlatformCanvas& canvas) {
-  if (!canvas.getTotalMatrix().isIdentity())
-    return true;
-
-  const SkRegion& clip_region = canvas.getTotalClip();
-  if (clip_region.isEmpty() || clip_region.isComplex())
-    return true;
-
-  // Now we know the clip is a regular rectangle, make sure it covers the
-  // entire canvas.
-  const SkBitmap& bitmap = canvas.getTopPlatformDevice().accessBitmap(false);
-  const SkIRect& clip_bounds = clip_region.getBounds();
-  if (clip_bounds.fLeft != 0 || clip_bounds.fTop != 0 ||
-      clip_bounds.fRight != bitmap.width() ||
-      clip_bounds.fBottom != bitmap.height())
-    return true;
-
-  return false;
-}
-
-}  // namespace
-
-void BlitContextToContext(NativeDrawingContext dst_context,
-                          const Rect& dst_rect,
-                          NativeDrawingContext src_context,
-                          const Point& src_origin) {
-#if defined(OS_WIN)
-  BitBlt(dst_context, dst_rect.x(), dst_rect.y(),
-         dst_rect.width(), dst_rect.height(),
-         src_context, src_origin.x(), src_origin.y(), SRCCOPY);
-#elif defined(OS_MACOSX)
-  // Only translations and/or vertical flips in the source context are
-  // supported; more complex source context transforms will be ignored.
-
-  // If there is a translation on the source context, we need to account for
-  // it ourselves since CGBitmapContextCreateImage will bypass it.
-  Rect src_rect(src_origin, dst_rect.size());
-  CGAffineTransform transform = CGContextGetCTM(src_context);
-  bool flipped = fabs(transform.d + 1) < 0.0001;
-  CGFloat delta_y = flipped ? CGBitmapContextGetHeight(src_context) -
-                              transform.ty
-                            : transform.ty;
-  src_rect.Offset(transform.tx, delta_y);
-
-  base::mac::ScopedCFTypeRef<CGImageRef>
-      src_image(CGBitmapContextCreateImage(src_context));
-  base::mac::ScopedCFTypeRef<CGImageRef> src_sub_image(
-      CGImageCreateWithImageInRect(src_image, src_rect.ToCGRect()));
-  CGContextDrawImage(dst_context, dst_rect.ToCGRect(), src_sub_image);
-#else  // Linux, BSD, others
-  // Only translations in the source context are supported; more complex
-  // source context transforms will be ignored.
-  cairo_save(dst_context);
-  double surface_x = src_origin.x();
-  double surface_y = src_origin.y();
-  cairo_user_to_device(src_context, &surface_x, &surface_y);
-  cairo_set_source_surface(dst_context, cairo_get_target(src_context),
-                           dst_rect.x()-surface_x, dst_rect.y()-surface_y);
-  cairo_rectangle(dst_context, dst_rect.x(), dst_rect.y(),
-                  dst_rect.width(), dst_rect.height());
-  cairo_clip(dst_context);
-  cairo_paint(dst_context);
-  cairo_restore(dst_context);
-#endif
-}
-
-static NativeDrawingContext GetContextFromCanvas(
-    skia::PlatformCanvas *canvas) {
-  skia::PlatformDevice& device = canvas->getTopPlatformDevice();
-#if defined(OS_WIN)
-  return device.getBitmapDC();
-#elif defined(OS_MACOSX)
-  return device.GetBitmapContext();
-#else  // Linux, BSD, others
-  return device.beginPlatformPaint();
-#endif
-}
-
-void BlitContextToCanvas(skia::PlatformCanvas *dst_canvas,
-                         const Rect& dst_rect,
-                         NativeDrawingContext src_context,
-                         const Point& src_origin) {
-  BlitContextToContext(GetContextFromCanvas(dst_canvas), dst_rect,
-                       src_context, src_origin);
-}
-
-void BlitCanvasToContext(NativeDrawingContext dst_context,
-                         const Rect& dst_rect,
-                         skia::PlatformCanvas *src_canvas,
-                         const Point& src_origin) {
-  BlitContextToContext(dst_context, dst_rect,
-                       GetContextFromCanvas(src_canvas), src_origin);
-}
-
-void BlitCanvasToCanvas(skia::PlatformCanvas *dst_canvas,
-                        const Rect& dst_rect,
-                        skia::PlatformCanvas *src_canvas,
-                        const Point& src_origin) {
-  BlitContextToContext(GetContextFromCanvas(dst_canvas), dst_rect,
-                       GetContextFromCanvas(src_canvas), src_origin);
-}
-
-#if defined(OS_WIN)
-
-void ScrollCanvas(skia::PlatformCanvas* canvas,
-                  const gfx::Rect& clip,
-                  const gfx::Point& amount) {
-  DCHECK(!HasClipOrTransform(*canvas));  // Don't support special stuff.
-  HDC hdc = canvas->beginPlatformPaint();
-
-  RECT damaged_rect;
-  RECT r = clip.ToRECT();
-  ScrollDC(hdc, amount.x(), amount.y(), NULL, &r, NULL, &damaged_rect);
-
-  canvas->endPlatformPaint();
-}
-
-#elif defined(OS_POSIX)
-// Cairo has no nice scroll function so we do our own. On Mac it's possible to
-// use platform scroll code, but it's complex so we just use the same path
-// here. Either way it will be software-only, so it shouldn't matter much.
-
-void ScrollCanvas(skia::PlatformCanvas* canvas,
-                  const gfx::Rect& in_clip,
-                  const gfx::Point& amount) {
-  DCHECK(!HasClipOrTransform(*canvas));  // Don't support special stuff.
-  SkBitmap& bitmap = const_cast<SkBitmap&>(
-      canvas->getTopPlatformDevice().accessBitmap(true));
-  SkAutoLockPixels lock(bitmap);
-
-  // We expect all coords to be inside the canvas, so clip here.
-  gfx::Rect clip = in_clip.Intersect(
-      gfx::Rect(0, 0, bitmap.width(), bitmap.height()));
-
-  // Compute the set of pixels we'll actually end up painting.
-  gfx::Rect dest_rect = clip;
-  dest_rect.Offset(amount);
-  dest_rect = dest_rect.Intersect(clip);
-  if (dest_rect.size() == gfx::Size())
-    return;  // Nothing to do.
-
-  // Compute the source pixels that will map to the dest_rect
-  gfx::Rect src_rect = dest_rect;
-  src_rect.Offset(-amount.x(), -amount.y());
-
-  size_t row_bytes = dest_rect.width() * 4;
-  if (amount.y() > 0) {
-    // Data is moving down, copy from the bottom up.
-    for (int y = dest_rect.height() - 1; y >= 0; y--) {
-      memcpy(bitmap.getAddr32(dest_rect.x(), dest_rect.y() + y),
-             bitmap.getAddr32(src_rect.x(), src_rect.y() + y),
-             row_bytes);
-    }
-  } else if (amount.y() < 0) {
-    // Data is moving up, copy from the top down.
-    for (int y = 0; y < dest_rect.height(); y++) {
-      memcpy(bitmap.getAddr32(dest_rect.x(), dest_rect.y() + y),
-             bitmap.getAddr32(src_rect.x(), src_rect.y() + y),
-             row_bytes);
-    }
-  } else if (amount.x() != 0) {
-    // Horizontal-only scroll. We can do it in either top-to-bottom or bottom-
-    // to-top, but have to be careful about the order for copying each row.
-    // Fortunately, memmove already handles this for us.
-    for (int y = 0; y < dest_rect.height(); y++) {
-      memmove(bitmap.getAddr32(dest_rect.x(), dest_rect.y() + y),
-              bitmap.getAddr32(src_rect.x(), src_rect.y() + y),
-              row_bytes);
-    }
-  }
-}
-
-#endif
-
-}  // namespace gfx