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Add getReducedClipStack to lua canvas

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R=reed@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/180283004

git-svn-id: http://skia.googlecode.com/svn/trunk@13594 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
commit-bot@chromium.org 2014-02-26 17:50:08 +00:00
parent 335619b26b
commit a47ac2bcc2
7 changed files with 111 additions and 31 deletions
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10
gyp/tools.gyp
View File

@ -189,6 +189,11 @@
'../tools/lua/lua_app.cpp',
'../src/utils/SkLua.cpp',
],
'include_dirs': [
# Lua exposes GrReduceClip which in turn requires src/core for SkTLList
'../src/gpu/',
'../src/core/',
],
'dependencies': [
'effects.gyp:effects',
'images.gyp:images',
@ -207,6 +212,11 @@
'../src/utils/SkLuaCanvas.cpp',
'../src/utils/SkLua.cpp',
],
'include_dirs': [
# Lua exposes GrReduceClip which in turn requires src/core for SkTLList
'../src/gpu/',
'../src/core/',
],
'dependencies': [
'effects.gyp:effects',
'flags.gyp:flags',

21
include/core/SkCanvas.h
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@ -90,12 +90,16 @@ public:
void flush();
/**
* DEPRECATED: call imageInfo() instead.
* Return the width/height of the underlying device. The current drawable
* area may be small (due to clipping or saveLayer). For a canvas with
* no device, 0,0 will be returned.
* Gets the size of the base or root layer in global canvas coordinates. The
* origin of the base layer is always (0,0). The current drawable area may be
* smaller (due to clipping or saveLayer).
*/
SkISize getDeviceSize() const;
SkISize getBaseLayerSize() const;
/**
* DEPRECATED: call getBaseLayerSize
*/
SkISize getDeviceSize() const { return this->getBaseLayerSize(); }
/**
* DEPRECATED.
@ -1129,6 +1133,7 @@ private:
friend class SkDrawIter; // needs setupDrawForLayerDevice()
friend class AutoDrawLooper;
friend class SkLua; // needs top layer size and offset
SkBaseDevice* createLayerDevice(const SkImageInfo&);
@ -1143,6 +1148,12 @@ private:
*/
SkBaseDevice* setRootDevice(SkBaseDevice* device);
/**
* Gets the size/origin of the top level layer in global canvas coordinates. We don't want this
* to be public because it exposes decisions about layer sizes that are internal to the canvas.
*/
SkISize getTopLayerSize() const;
SkIPoint getTopLayerOrigin() const;
// internal methods are not virtual, so they can safely be called by other
// canvas apis, without confusing subclasses (like SkPictureRecording)

6
include/utils/SkLua.h
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@ -8,6 +8,7 @@
#ifndef SkLua_DEFINED
#define SkLua_DEFINED
#include "SkClipStack.h"
#include "SkColor.h"
#include "SkScalar.h"
#include "SkString.h"
@ -15,7 +16,6 @@
struct lua_State;
class SkCanvas;
class SkClipStack;
class SkMatrix;
class SkPaint;
class SkPath;
@ -55,6 +55,10 @@ public:
void pushPath(const SkPath&, const char tableKey[] = NULL);
void pushCanvas(SkCanvas*, const char tableKey[] = NULL);
void pushClipStack(const SkClipStack&, const char tableKey[] = NULL);
void pushClipStackElement(const SkClipStack::Element& element, const char tableKey[] = NULL);
// This SkCanvas lua methods is declared here to benefit from SkLua's friendship with SkCanvas.
static int lcanvas_getReducedClipStack(lua_State* L);
private:
lua_State* fL;

12
src/core/SkCanvas.cpp
View File

@ -583,7 +583,17 @@ void SkCanvas::flush() {
}
}
SkISize SkCanvas::getDeviceSize() const {
SkISize SkCanvas::getTopLayerSize() const {
SkBaseDevice* d = this->getTopDevice();
return d ? SkISize::Make(d->width(), d->height()) : SkISize::Make(0, 0);
}
SkIPoint SkCanvas::getTopLayerOrigin() const {
SkBaseDevice* d = this->getTopDevice();
return d ? d->getOrigin() : SkIPoint::Make(0, 0);
}
SkISize SkCanvas::getBaseLayerSize() const {
SkBaseDevice* d = this->getDevice();
return d ? SkISize::Make(d->width(), d->height()) : SkISize::Make(0, 0);
}

4
src/core/SkTLList.h
View File

@ -198,11 +198,11 @@ public:
Iter() {}
Iter(const SkTLList& list, IterStart start) {
Iter(const SkTLList& list, IterStart start = kHead_IterStart) {
INHERITED::init(list.fList, start);
}
T* init(const SkTLList& list, IterStart start) {
T* init(const SkTLList& list, IterStart start = kHead_IterStart) {
return this->nodeToObj(INHERITED::init(list.fList, start));
}

83
src/utils/SkLua.cpp
View File

@ -6,8 +6,9 @@
*/
#include "SkLua.h"
#include "GrReducedClip.h"
#include "SkCanvas.h"
#include "SkClipStack.h"
#include "SkData.h"
#include "SkDocument.h"
#include "SkImage.h"
@ -273,29 +274,35 @@ void SkLua::pushClipStack(const SkClipStack& stack, const char* key) {
const SkClipStack::Element* element;
int i = 0;
while (NULL != (element = iter.next())) {
lua_newtable(fL);
SkClipStack::Element::Type type = element->getType();
this->pushString(element_type(type), "type");
switch (type) {
case SkClipStack::Element::kEmpty_Type:
break;
case SkClipStack::Element::kRect_Type:
this->pushRect(element->getRect(), "rect");
break;
case SkClipStack::Element::kRRect_Type:
this->pushRRect(element->getRRect(), "rrect");
break;
case SkClipStack::Element::kPath_Type:
this->pushPath(element->getPath(), "path");
break;
}
this->pushString(region_op(element->getOp()), "op");
this->pushBool(element->isAA(), "aa");
this->pushClipStackElement(*element);
lua_rawseti(fL, -2, ++i);
}
CHECK_SETFIELD(key);
}
void SkLua::pushClipStackElement(const SkClipStack::Element& element, const char* key) {
lua_newtable(fL);
SkClipStack::Element::Type type = element.getType();
this->pushString(element_type(type), "type");
switch (type) {
case SkClipStack::Element::kEmpty_Type:
break;
case SkClipStack::Element::kRect_Type:
this->pushRect(element.getRect(), "rect");
break;
case SkClipStack::Element::kRRect_Type:
this->pushRRect(element.getRRect(), "rrect");
break;
case SkClipStack::Element::kPath_Type:
this->pushPath(element.getPath(), "path");
break;
}
this->pushString(region_op(element.getOp()), "op");
this->pushBool(element.isAA(), "aa");
CHECK_SETFIELD(key);
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
@ -444,6 +451,41 @@ static int lcanvas_getClipStack(lua_State* L) {
return 1;
}
int SkLua::lcanvas_getReducedClipStack(lua_State* L) {
const SkCanvas* canvas = get_ref<SkCanvas>(L, 1);
SkISize layerSize = canvas->getTopLayerSize();
SkIPoint layerOrigin = canvas->getTopLayerOrigin();
SkIRect queryBounds = SkIRect::MakeXYWH(layerOrigin.fX, layerOrigin.fY,
layerSize.fWidth, layerSize.fHeight);
GrReducedClip::ElementList elements;
GrReducedClip::InitialState initialState;
int32_t genID;
SkIRect resultBounds;
const SkClipStack& stack = *canvas->getClipStack();
GrReducedClip::ReduceClipStack(stack,
queryBounds,
&elements,
&genID,
&initialState,
&resultBounds,
NULL);
GrReducedClip::ElementList::Iter iter(elements);
int i = 0;
lua_newtable(L);
while(NULL != iter.get()) {
SkLua(L).pushClipStackElement(*iter.get());
iter.next();
lua_rawseti(L, -2, ++i);
}
// Currently this only returns the element list to lua, not the initial state or result bounds.
// It could return these as additional items on the lua stack.
return 1;
}
static int lcanvas_save(lua_State* L) {
lua_pushinteger(L, get_ref<SkCanvas>(L, 1)->save());
return 1;
@ -479,7 +521,7 @@ static int lcanvas_gc(lua_State* L) {
return 0;
}
static const struct luaL_Reg gSkCanvas_Methods[] = {
const struct luaL_Reg gSkCanvas_Methods[] = {
{ "drawColor", lcanvas_drawColor },
{ "drawRect", lcanvas_drawRect },
{ "drawOval", lcanvas_drawOval },
@ -490,6 +532,7 @@ static const struct luaL_Reg gSkCanvas_Methods[] = {
{ "getSaveCount", lcanvas_getSaveCount },
{ "getTotalMatrix", lcanvas_getTotalMatrix },
{ "getClipStack", lcanvas_getClipStack },
{ "getReducedClipStack", SkLua::lcanvas_getReducedClipStack },
{ "save", lcanvas_save },
{ "restore", lcanvas_restore },
{ "scale", lcanvas_scale },

6
tools/lua/dump_clipstack_at_restore.lua
View File

@ -11,7 +11,8 @@ end
function sk_scrape_accumulate(t)
if (t.verb == "restore") then
restoreCount = restoreCount + 1;
io.write("Clip Stack at restore #", restoreCount, ":\n")
-- io.write("Clip Stack at restore #", restoreCount, ":\n")
io.write("Reduced Clip Stack at restore #", restoreCount, ":\n")
for i = 1, #clipstack do
local element = clipstack[i];
io.write("\t", element["op"], ", ", element["type"], ", aa:", tostring(element["aa"]))
@ -24,7 +25,8 @@ function sk_scrape_accumulate(t)
end
io.write("\n")
else
clipstack = canvas:getClipStack()
-- clipstack = canvas:getClipStack()
clipstack = canvas:getReducedClipStack()
end
end