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9fbc3f31c0
skia2/src/utils/SkLua.cpp
reed 9fbc3f31c0 add gradients and drawPaint to lua 
BUG=skia:
TBR=

Review URL: https://codereview.chromium.org/667803004
2014-10-21 07:12:58 -07:00

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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkLua.h"
#if SK_SUPPORT_GPU
#include "GrReducedClip.h"
#endif
#include "SkBlurImageFilter.h"
#include "SkCanvas.h"
#include "SkData.h"
#include "SkDecodingImageGenerator.h"
#include "SkDocument.h"
#include "SkGradientShader.h"
#include "SkImage.h"
#include "SkMatrix.h"
#include "SkPaint.h"
#include "SkPath.h"
#include "SkPictureRecorder.h"
#include "SkPixelRef.h"
#include "SkRRect.h"
#include "SkString.h"
#include "SkSurface.h"
#include "SkTextBlob.h"
#include "SkTypeface.h"
extern "C" {
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"
}
// return the metatable name for a given class
template <typename T> const char* get_mtname();
#define DEF_MTNAME(T) \
template <> const char* get_mtname<T>() { \
return #T "_LuaMetaTableName"; \
}
DEF_MTNAME(SkCanvas)
DEF_MTNAME(SkDocument)
DEF_MTNAME(SkImage)
DEF_MTNAME(SkImageFilter)
DEF_MTNAME(SkMatrix)
DEF_MTNAME(SkRRect)
DEF_MTNAME(SkPath)
DEF_MTNAME(SkPaint)
DEF_MTNAME(SkPathEffect)
DEF_MTNAME(SkPicture)
DEF_MTNAME(SkPictureRecorder)
DEF_MTNAME(SkShader)
DEF_MTNAME(SkSurface)
DEF_MTNAME(SkTextBlob)
DEF_MTNAME(SkTypeface)
template <typename T> T* push_new(lua_State* L) {
T* addr = (T*)lua_newuserdata(L, sizeof(T));
new (addr) T;
luaL_getmetatable(L, get_mtname<T>());
lua_setmetatable(L, -2);
return addr;
}
template <typename T> void push_obj(lua_State* L, const T& obj) {
new (lua_newuserdata(L, sizeof(T))) T(obj);
luaL_getmetatable(L, get_mtname<T>());
lua_setmetatable(L, -2);
}
template <typename T> T* push_ref(lua_State* L, T* ref) {
*(T**)lua_newuserdata(L, sizeof(T*)) = SkSafeRef(ref);
luaL_getmetatable(L, get_mtname<T>());
lua_setmetatable(L, -2);
return ref;
}
template <typename T> T* get_ref(lua_State* L, int index) {
return *(T**)luaL_checkudata(L, index, get_mtname<T>());
}
template <typename T> T* get_obj(lua_State* L, int index) {
return (T*)luaL_checkudata(L, index, get_mtname<T>());
}
static bool lua2bool(lua_State* L, int index) {
return !!lua_toboolean(L, index);
}
///////////////////////////////////////////////////////////////////////////////
SkLua::SkLua(const char termCode[]) : fTermCode(termCode), fWeOwnL(true) {
fL = luaL_newstate();
luaL_openlibs(fL);
SkLua::Load(fL);
}
SkLua::SkLua(lua_State* L) : fL(L), fWeOwnL(false) {}
SkLua::~SkLua() {
if (fWeOwnL) {
if (fTermCode.size() > 0) {
lua_getglobal(fL, fTermCode.c_str());
if (lua_pcall(fL, 0, 0, 0) != LUA_OK) {
SkDebugf("lua err: %s\n", lua_tostring(fL, -1));
}
}
lua_close(fL);
}
}
bool SkLua::runCode(const char code[]) {
int err = luaL_loadstring(fL, code) || lua_pcall(fL, 0, 0, 0);
if (err) {
SkDebugf("--- lua failed: %s\n", lua_tostring(fL, -1));
return false;
}
return true;
}
bool SkLua::runCode(const void* code, size_t size) {
SkString str((const char*)code, size);
return this->runCode(str.c_str());
}
///////////////////////////////////////////////////////////////////////////////
#define CHECK_SETFIELD(key) do if (key) lua_setfield(fL, -2, key); while (0)
static void setfield_bool_if(lua_State* L, const char key[], bool pred) {
if (pred) {
lua_pushboolean(L, true);
lua_setfield(L, -2, key);
}
}
static void setfield_string(lua_State* L, const char key[], const char value[]) {
lua_pushstring(L, value);
lua_setfield(L, -2, key);
}
static void setfield_number(lua_State* L, const char key[], double value) {
lua_pushnumber(L, value);
lua_setfield(L, -2, key);
}
static void setfield_boolean(lua_State* L, const char key[], bool value) {
lua_pushboolean(L, value);
lua_setfield(L, -2, key);
}
static void setfield_scalar(lua_State* L, const char key[], SkScalar value) {
setfield_number(L, key, SkScalarToLua(value));
}
static void setfield_function(lua_State* L,
const char key[], lua_CFunction value) {
lua_pushcfunction(L, value);
lua_setfield(L, -2, key);
}
static void setarray_number(lua_State* L, int index, double value) {
lua_pushnumber(L, value);
lua_rawseti(L, -2, index);
}
static void setarray_scalar(lua_State* L, int index, SkScalar value) {
setarray_number(L, index, SkScalarToLua(value));
}
void SkLua::pushBool(bool value, const char key[]) {
lua_pushboolean(fL, value);
CHECK_SETFIELD(key);
}
void SkLua::pushString(const char str[], const char key[]) {
lua_pushstring(fL, str);
CHECK_SETFIELD(key);
}
void SkLua::pushString(const char str[], size_t length, const char key[]) {
// TODO: how to do this w/o making a copy?
SkString s(str, length);
lua_pushstring(fL, s.c_str());
CHECK_SETFIELD(key);
}
void SkLua::pushString(const SkString& str, const char key[]) {
lua_pushstring(fL, str.c_str());
CHECK_SETFIELD(key);
}
void SkLua::pushColor(SkColor color, const char key[]) {
lua_newtable(fL);
setfield_number(fL, "a", SkColorGetA(color) / 255.0);
setfield_number(fL, "r", SkColorGetR(color) / 255.0);
setfield_number(fL, "g", SkColorGetG(color) / 255.0);
setfield_number(fL, "b", SkColorGetB(color) / 255.0);
CHECK_SETFIELD(key);
}
void SkLua::pushU32(uint32_t value, const char key[]) {
lua_pushnumber(fL, (double)value);
CHECK_SETFIELD(key);
}
void SkLua::pushScalar(SkScalar value, const char key[]) {
lua_pushnumber(fL, SkScalarToLua(value));
CHECK_SETFIELD(key);
}
void SkLua::pushArrayU16(const uint16_t array[], int count, const char key[]) {
lua_newtable(fL);
for (int i = 0; i < count; ++i) {
// make it base-1 to match lua convention
setarray_number(fL, i + 1, (double)array[i]);
}
CHECK_SETFIELD(key);
}
void SkLua::pushArrayPoint(const SkPoint array[], int count, const char key[]) {
lua_newtable(fL);
for (int i = 0; i < count; ++i) {
// make it base-1 to match lua convention
lua_newtable(fL);
this->pushScalar(array[i].fX, "x");
this->pushScalar(array[i].fY, "y");
lua_rawseti(fL, -2, i + 1);
}
CHECK_SETFIELD(key);
}
void SkLua::pushArrayScalar(const SkScalar array[], int count, const char key[]) {
lua_newtable(fL);
for (int i = 0; i < count; ++i) {
// make it base-1 to match lua convention
setarray_scalar(fL, i + 1, array[i]);
}
CHECK_SETFIELD(key);
}
void SkLua::pushRect(const SkRect& r, const char key[]) {
lua_newtable(fL);
setfield_scalar(fL, "left", r.fLeft);
setfield_scalar(fL, "top", r.fTop);
setfield_scalar(fL, "right", r.fRight);
setfield_scalar(fL, "bottom", r.fBottom);
CHECK_SETFIELD(key);
}
void SkLua::pushRRect(const SkRRect& rr, const char key[]) {
push_obj(fL, rr);
CHECK_SETFIELD(key);
}
void SkLua::pushDash(const SkPathEffect::DashInfo& info, const char key[]) {
lua_newtable(fL);
setfield_scalar(fL, "phase", info.fPhase);
this->pushArrayScalar(info.fIntervals, info.fCount, "intervals");
CHECK_SETFIELD(key);
}
void SkLua::pushMatrix(const SkMatrix& matrix, const char key[]) {
push_obj(fL, matrix);
CHECK_SETFIELD(key);
}
void SkLua::pushPaint(const SkPaint& paint, const char key[]) {
push_obj(fL, paint);
CHECK_SETFIELD(key);
}
void SkLua::pushPath(const SkPath& path, const char key[]) {
push_obj(fL, path);
CHECK_SETFIELD(key);
}
void SkLua::pushCanvas(SkCanvas* canvas, const char key[]) {
push_ref(fL, canvas);
CHECK_SETFIELD(key);
}
void SkLua::pushTextBlob(const SkTextBlob* blob, const char key[]) {
push_ref(fL, const_cast<SkTextBlob*>(blob));
CHECK_SETFIELD(key);
}
static const char* element_type(SkClipStack::Element::Type type) {
switch (type) {
case SkClipStack::Element::kEmpty_Type:
return "empty";
case SkClipStack::Element::kRect_Type:
return "rect";
case SkClipStack::Element::kRRect_Type:
return "rrect";
case SkClipStack::Element::kPath_Type:
return "path";
}
return "unknown";
}
static const char* region_op(SkRegion::Op op) {
switch (op) {
case SkRegion::kDifference_Op:
return "difference";
case SkRegion::kIntersect_Op:
return "intersect";
case SkRegion::kUnion_Op:
return "union";
case SkRegion::kXOR_Op:
return "xor";
case SkRegion::kReverseDifference_Op:
return "reverse-difference";
case SkRegion::kReplace_Op:
return "replace";
}
return "unknown";
}
void SkLua::pushClipStack(const SkClipStack& stack, const char* key) {
lua_newtable(fL);
SkClipStack::B2TIter iter(stack);
const SkClipStack::Element* element;
int i = 0;
while ((element = iter.next())) {
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);
}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
static int lua2int_def(lua_State* L, int index, int defaultValue) {
if (lua_isnumber(L, index)) {
return (int)lua_tonumber(L, index);
} else {
return defaultValue;
}
}
static SkScalar lua2scalar(lua_State* L, int index) {
SkASSERT(lua_isnumber(L, index));
return SkLuaToScalar(lua_tonumber(L, index));
}
static SkScalar lua2scalar_def(lua_State* L, int index, SkScalar defaultValue) {
if (lua_isnumber(L, index)) {
return SkLuaToScalar(lua_tonumber(L, index));
} else {
return defaultValue;
}
}
static SkScalar getfield_scalar(lua_State* L, int index, const char key[]) {
SkASSERT(lua_istable(L, index));
lua_pushstring(L, key);
lua_gettable(L, index);
SkScalar value = lua2scalar(L, -1);
lua_pop(L, 1);
return value;
}
static SkScalar getfield_scalar_default(lua_State* L, int index, const char key[], SkScalar def) {
SkASSERT(lua_istable(L, index));
lua_pushstring(L, key);
lua_gettable(L, index);
SkScalar value;
if (lua_isnil(L, -1)) {
value = def;
} else {
value = lua2scalar(L, -1);
}
lua_pop(L, 1);
return value;
}
static SkScalar byte2unit(U8CPU byte) {
return byte / 255.0f;
}
static U8CPU unit2byte(SkScalar x) {
if (x <= 0) {
return 0;
} else if (x >= 1) {
return 255;
} else {
return SkScalarRoundToInt(x * 255);
}
}
static SkColor lua2color(lua_State* L, int index) {
return SkColorSetARGB(unit2byte(getfield_scalar_default(L, index, "a", 1)),
unit2byte(getfield_scalar_default(L, index, "r", 0)),
unit2byte(getfield_scalar_default(L, index, "g", 0)),
unit2byte(getfield_scalar_default(L, index, "b", 0)));
}
static SkRect* lua2rect(lua_State* L, int index, SkRect* rect) {
rect->set(getfield_scalar_default(L, index, "left", 0),
getfield_scalar_default(L, index, "top", 0),
getfield_scalar(L, index, "right"),
getfield_scalar(L, index, "bottom"));
return rect;
}
static int lcanvas_clear(lua_State* L) {
get_ref<SkCanvas>(L, 1)->clear(0);
return 0;
}
static int lcanvas_drawColor(lua_State* L) {
get_ref<SkCanvas>(L, 1)->drawColor(lua2color(L, 2));
return 0;
}
static int lcanvas_drawPaint(lua_State* L) {
get_ref<SkCanvas>(L, 1)->drawPaint(*get_obj<SkPaint>(L, 2));
return 0;
}
static int lcanvas_drawRect(lua_State* L) {
SkRect rect;
get_ref<SkCanvas>(L, 1)->drawRect(*lua2rect(L, 2, &rect),
*get_obj<SkPaint>(L, 3));
return 0;
}
static int lcanvas_drawOval(lua_State* L) {
SkRect rect;
get_ref<SkCanvas>(L, 1)->drawOval(*lua2rect(L, 2, &rect),
*get_obj<SkPaint>(L, 3));
return 0;
}
static int lcanvas_drawCircle(lua_State* L) {
get_ref<SkCanvas>(L, 1)->drawCircle(lua2scalar(L, 2),
lua2scalar(L, 3),
lua2scalar(L, 4),
*get_obj<SkPaint>(L, 5));
return 0;
}
static SkPaint* lua2OptionalPaint(lua_State* L, int index, SkPaint* paint) {
if (lua_isnumber(L, index)) {
paint->setAlpha(SkScalarRoundToInt(lua2scalar(L, index) * 255));
return paint;
} else if (lua_isuserdata(L, index)) {
const SkPaint* ptr = get_obj<SkPaint>(L, index);
if (ptr) {
*paint = *ptr;
return paint;
}
}
return NULL;
}
static int lcanvas_drawImage(lua_State* L) {
SkCanvas* canvas = get_ref<SkCanvas>(L, 1);
SkImage* image = get_ref<SkImage>(L, 2);
if (NULL == image) {
return 0;
}
SkScalar x = lua2scalar(L, 3);
SkScalar y = lua2scalar(L, 4);
SkPaint paint;
canvas->drawImage(image, x, y, lua2OptionalPaint(L, 5, &paint));
return 0;
}
static int lcanvas_drawImageRect(lua_State* L) {
SkCanvas* canvas = get_ref<SkCanvas>(L, 1);
SkImage* image = get_ref<SkImage>(L, 2);
if (NULL == image) {
return 0;
}
SkRect srcR, dstR;
SkRect* srcRPtr = NULL;
if (!lua_isnil(L, 3)) {
srcRPtr = lua2rect(L, 3, &srcR);
}
lua2rect(L, 4, &dstR);
SkPaint paint;
canvas->drawImageRect(image, srcRPtr, dstR, lua2OptionalPaint(L, 5, &paint));
return 0;
}
static int lcanvas_drawPath(lua_State* L) {
get_ref<SkCanvas>(L, 1)->drawPath(*get_obj<SkPath>(L, 2),
*get_obj<SkPaint>(L, 3));
return 0;
}
// drawPicture(pic, x, y, paint)
static int lcanvas_drawPicture(lua_State* L) {
SkCanvas* canvas = get_ref<SkCanvas>(L, 1);
SkPicture* picture = get_ref<SkPicture>(L, 2);
SkScalar x = lua2scalar_def(L, 3, 0);
SkScalar y = lua2scalar_def(L, 4, 0);
SkMatrix matrix, *matrixPtr = NULL;
if (x || y) {
matrix.setTranslate(x, y);
matrixPtr = &matrix;
}
SkPaint paint;
canvas->drawPicture(picture, matrixPtr, lua2OptionalPaint(L, 5, &paint));
return 0;
}
static int lcanvas_drawText(lua_State* L) {
if (lua_gettop(L) < 5) {
return 0;
}
if (lua_isstring(L, 2) && lua_isnumber(L, 3) && lua_isnumber(L, 4)) {
size_t len;
const char* text = lua_tolstring(L, 2, &len);
get_ref<SkCanvas>(L, 1)->drawText(text, len,
lua2scalar(L, 3), lua2scalar(L, 4),
*get_obj<SkPaint>(L, 5));
}
return 0;
}
static int lcanvas_getSaveCount(lua_State* L) {
lua_pushnumber(L, get_ref<SkCanvas>(L, 1)->getSaveCount());
return 1;
}
static int lcanvas_getTotalMatrix(lua_State* L) {
SkLua(L).pushMatrix(get_ref<SkCanvas>(L, 1)->getTotalMatrix());
return 1;
}
static int lcanvas_getClipStack(lua_State* L) {
SkLua(L).pushClipStack(*get_ref<SkCanvas>(L, 1)->getClipStack());
return 1;
}
int SkLua::lcanvas_getReducedClipStack(lua_State* L) {
#if SK_SUPPORT_GPU
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(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;
#else
return 0;
#endif
}
static int lcanvas_save(lua_State* L) {
lua_pushinteger(L, get_ref<SkCanvas>(L, 1)->save());
return 1;
}
static int lcanvas_restore(lua_State* L) {
get_ref<SkCanvas>(L, 1)->restore();
return 0;
}
static int lcanvas_scale(lua_State* L) {
SkScalar sx = lua2scalar_def(L, 2, 1);
SkScalar sy = lua2scalar_def(L, 3, sx);
get_ref<SkCanvas>(L, 1)->scale(sx, sy);
return 0;
}
static int lcanvas_translate(lua_State* L) {
SkScalar tx = lua2scalar_def(L, 2, 0);
SkScalar ty = lua2scalar_def(L, 3, 0);
get_ref<SkCanvas>(L, 1)->translate(tx, ty);
return 0;
}
static int lcanvas_rotate(lua_State* L) {
SkScalar degrees = lua2scalar_def(L, 2, 0);
get_ref<SkCanvas>(L, 1)->rotate(degrees);
return 0;
}
static int lcanvas_concat(lua_State* L) {
get_ref<SkCanvas>(L, 1)->concat(*get_obj<SkMatrix>(L, 2));
return 0;
}
static int lcanvas_newSurface(lua_State* L) {
int width = lua2int_def(L, 2, 0);
int height = lua2int_def(L, 2, 0);
SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
SkSurface* surface = get_ref<SkCanvas>(L, 1)->newSurface(info);
if (NULL == surface) {
lua_pushnil(L);
} else {
push_ref(L, surface)->unref();
}
return 1;
}
static int lcanvas_gc(lua_State* L) {
get_ref<SkCanvas>(L, 1)->unref();
return 0;
}
const struct luaL_Reg gSkCanvas_Methods[] = {
{ "clear", lcanvas_clear },
{ "drawColor", lcanvas_drawColor },
{ "drawPaint", lcanvas_drawPaint },
{ "drawRect", lcanvas_drawRect },
{ "drawOval", lcanvas_drawOval },
{ "drawCircle", lcanvas_drawCircle },
{ "drawImage", lcanvas_drawImage },
{ "drawImageRect", lcanvas_drawImageRect },
{ "drawPath", lcanvas_drawPath },
{ "drawPicture", lcanvas_drawPicture },
{ "drawText", lcanvas_drawText },
{ "getSaveCount", lcanvas_getSaveCount },
{ "getTotalMatrix", lcanvas_getTotalMatrix },
{ "getClipStack", lcanvas_getClipStack },
#if SK_SUPPORT_GPU
{ "getReducedClipStack", SkLua::lcanvas_getReducedClipStack },
#endif
{ "save", lcanvas_save },
{ "restore", lcanvas_restore },
{ "scale", lcanvas_scale },
{ "translate", lcanvas_translate },
{ "rotate", lcanvas_rotate },
{ "concat", lcanvas_concat },
{ "newSurface", lcanvas_newSurface },
{ "__gc", lcanvas_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int ldocument_beginPage(lua_State* L) {
const SkRect* contentPtr = NULL;
push_ref(L, get_ref<SkDocument>(L, 1)->beginPage(lua2scalar(L, 2),
lua2scalar(L, 3),
contentPtr));
return 1;
}
static int ldocument_endPage(lua_State* L) {
get_ref<SkDocument>(L, 1)->endPage();
return 0;
}
static int ldocument_close(lua_State* L) {
get_ref<SkDocument>(L, 1)->close();
return 0;
}
static int ldocument_gc(lua_State* L) {
get_ref<SkDocument>(L, 1)->unref();
return 0;
}
static const struct luaL_Reg gSkDocument_Methods[] = {
{ "beginPage", ldocument_beginPage },
{ "endPage", ldocument_endPage },
{ "close", ldocument_close },
{ "__gc", ldocument_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int lpaint_isAntiAlias(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isAntiAlias());
return 1;
}
static int lpaint_setAntiAlias(lua_State* L) {
get_obj<SkPaint>(L, 1)->setAntiAlias(lua2bool(L, 2));
return 0;
}
static int lpaint_isDither(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isDither());
return 1;
}
static int lpaint_isUnderlineText(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isUnderlineText());
return 1;
}
static int lpaint_isStrikeThruText(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isStrikeThruText());
return 1;
}
static int lpaint_isFakeBoldText(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isFakeBoldText());
return 1;
}
static int lpaint_isLinearText(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isLinearText());
return 1;
}
static int lpaint_isSubpixelText(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isSubpixelText());
return 1;
}
static int lpaint_setSubpixelText(lua_State* L) {
get_obj<SkPaint>(L, 1)->setSubpixelText(lua2bool(L, 2));
return 1;
}
static int lpaint_isDevKernText(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isDevKernText());
return 1;
}
static int lpaint_isLCDRenderText(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isLCDRenderText());
return 1;
}
static int lpaint_isEmbeddedBitmapText(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isEmbeddedBitmapText());
return 1;
}
static int lpaint_isAutohinted(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isAutohinted());
return 1;
}
static int lpaint_isVerticalText(lua_State* L) {
lua_pushboolean(L, get_obj<SkPaint>(L, 1)->isVerticalText());
return 1;
}
static int lpaint_getAlpha(lua_State* L) {
SkLua(L).pushScalar(byte2unit(get_obj<SkPaint>(L, 1)->getAlpha()));
return 1;
}
static int lpaint_setAlpha(lua_State* L) {
get_obj<SkPaint>(L, 1)->setAlpha(unit2byte(lua2scalar(L, 2)));
return 0;
}
static int lpaint_getColor(lua_State* L) {
SkLua(L).pushColor(get_obj<SkPaint>(L, 1)->getColor());
return 1;
}
static int lpaint_setColor(lua_State* L) {
get_obj<SkPaint>(L, 1)->setColor(lua2color(L, 2));
return 0;
}
static int lpaint_getTextSize(lua_State* L) {
SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getTextSize());
return 1;
}
static int lpaint_getTextScaleX(lua_State* L) {
SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getTextScaleX());
return 1;
}
static int lpaint_getTextSkewX(lua_State* L) {
SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getTextSkewX());
return 1;
}
static int lpaint_setTextSize(lua_State* L) {
get_obj<SkPaint>(L, 1)->setTextSize(lua2scalar(L, 2));
return 0;
}
static int lpaint_getTypeface(lua_State* L) {
push_ref(L, get_obj<SkPaint>(L, 1)->getTypeface());
return 1;
}
static int lpaint_setTypeface(lua_State* L) {
get_obj<SkPaint>(L, 1)->setTypeface(get_ref<SkTypeface>(L, 2));
return 0;
}
static int lpaint_getHinting(lua_State* L) {
SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getHinting());
return 1;
}
static int lpaint_getFontID(lua_State* L) {
SkTypeface* face = get_obj<SkPaint>(L, 1)->getTypeface();
SkLua(L).pushU32(SkTypeface::UniqueID(face));
return 1;
}
static const struct {
const char* fLabel;
SkPaint::Align fAlign;
} gAlignRec[] = {
{ "left", SkPaint::kLeft_Align },
{ "center", SkPaint::kCenter_Align },
{ "right", SkPaint::kRight_Align },
};
static int lpaint_getTextAlign(lua_State* L) {
SkPaint::Align align = get_obj<SkPaint>(L, 1)->getTextAlign();
for (size_t i = 0; i < SK_ARRAY_COUNT(gAlignRec); ++i) {
if (gAlignRec[i].fAlign == align) {
lua_pushstring(L, gAlignRec[i].fLabel);
return 1;
}
}
return 0;
}
static int lpaint_setTextAlign(lua_State* L) {
if (lua_isstring(L, 2)) {
size_t len;
const char* label = lua_tolstring(L, 2, &len);
for (size_t i = 0; i < SK_ARRAY_COUNT(gAlignRec); ++i) {
if (!strcmp(gAlignRec[i].fLabel, label)) {
get_obj<SkPaint>(L, 1)->setTextAlign(gAlignRec[i].fAlign);
break;
}
}
}
return 0;
}
static int lpaint_getStroke(lua_State* L) {
lua_pushboolean(L, SkPaint::kStroke_Style == get_obj<SkPaint>(L, 1)->getStyle());
return 1;
}
static int lpaint_setStroke(lua_State* L) {
SkPaint::Style style;
if (lua_toboolean(L, 2)) {
style = SkPaint::kStroke_Style;
} else {
style = SkPaint::kFill_Style;
}
get_obj<SkPaint>(L, 1)->setStyle(style);
return 0;
}
static int lpaint_getStrokeCap(lua_State* L) {
SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getStrokeCap());
return 1;
}
static int lpaint_getStrokeJoin(lua_State* L) {
SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getStrokeJoin());
return 1;
}
static int lpaint_getTextEncoding(lua_State* L) {
SkLua(L).pushU32(get_obj<SkPaint>(L, 1)->getTextEncoding());
return 1;
}
static int lpaint_getStrokeWidth(lua_State* L) {
SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getStrokeWidth());
return 1;
}
static int lpaint_setStrokeWidth(lua_State* L) {
get_obj<SkPaint>(L, 1)->setStrokeWidth(lua2scalar(L, 2));
return 0;
}
static int lpaint_getStrokeMiter(lua_State* L) {
SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->getStrokeMiter());
return 1;
}
static int lpaint_measureText(lua_State* L) {
if (lua_isstring(L, 2)) {
size_t len;
const char* text = lua_tolstring(L, 2, &len);
SkLua(L).pushScalar(get_obj<SkPaint>(L, 1)->measureText(text, len));
return 1;
}
return 0;
}
struct FontMetrics {
SkScalar fTop; //!< The greatest distance above the baseline for any glyph (will be <= 0)
SkScalar fAscent; //!< The recommended distance above the baseline (will be <= 0)
SkScalar fDescent; //!< The recommended distance below the baseline (will be >= 0)
SkScalar fBottom; //!< The greatest distance below the baseline for any glyph (will be >= 0)
SkScalar fLeading; //!< The recommended distance to add between lines of text (will be >= 0)
SkScalar fAvgCharWidth; //!< the average charactor width (>= 0)
SkScalar fXMin; //!< The minimum bounding box x value for all glyphs
SkScalar fXMax; //!< The maximum bounding box x value for all glyphs
SkScalar fXHeight; //!< the height of an 'x' in px, or 0 if no 'x' in face
};
static int lpaint_getFontMetrics(lua_State* L) {
SkPaint::FontMetrics fm;
SkScalar height = get_obj<SkPaint>(L, 1)->getFontMetrics(&fm);
lua_newtable(L);
setfield_scalar(L, "top", fm.fTop);
setfield_scalar(L, "ascent", fm.fAscent);
setfield_scalar(L, "descent", fm.fDescent);
setfield_scalar(L, "bottom", fm.fBottom);
setfield_scalar(L, "leading", fm.fLeading);
SkLua(L).pushScalar(height);
return 2;
}
static int lpaint_getEffects(lua_State* L) {
const SkPaint* paint = get_obj<SkPaint>(L, 1);
lua_newtable(L);
setfield_bool_if(L, "looper", !!paint->getLooper());
setfield_bool_if(L, "pathEffect", !!paint->getPathEffect());
setfield_bool_if(L, "rasterizer", !!paint->getRasterizer());
setfield_bool_if(L, "maskFilter", !!paint->getMaskFilter());
setfield_bool_if(L, "shader", !!paint->getShader());
setfield_bool_if(L, "colorFilter", !!paint->getColorFilter());
setfield_bool_if(L, "imageFilter", !!paint->getImageFilter());
setfield_bool_if(L, "xfermode", !!paint->getXfermode());
return 1;
}
static int lpaint_getImageFilter(lua_State* L) {
const SkPaint* paint = get_obj<SkPaint>(L, 1);
SkImageFilter* imf = paint->getImageFilter();
if (imf) {
push_ref(L, imf);
return 1;
}
return 0;
}
static int lpaint_setImageFilter(lua_State* L) {
SkPaint* paint = get_obj<SkPaint>(L, 1);
paint->setImageFilter(get_ref<SkImageFilter>(L, 2));
return 0;
}
static int lpaint_getShader(lua_State* L) {
const SkPaint* paint = get_obj<SkPaint>(L, 1);
SkShader* shader = paint->getShader();
if (shader) {
push_ref(L, shader);
return 1;
}
return 0;
}
static int lpaint_setShader(lua_State* L) {
SkPaint* paint = get_obj<SkPaint>(L, 1);
paint->setShader(get_ref<SkShader>(L, 2));
return 0;
}
static int lpaint_getPathEffect(lua_State* L) {
const SkPaint* paint = get_obj<SkPaint>(L, 1);
SkPathEffect* pe = paint->getPathEffect();
if (pe) {
push_ref(L, pe);
return 1;
}
return 0;
}
static int lpaint_gc(lua_State* L) {
get_obj<SkPaint>(L, 1)->~SkPaint();
return 0;
}
static const struct luaL_Reg gSkPaint_Methods[] = {
{ "isAntiAlias", lpaint_isAntiAlias },
{ "setAntiAlias", lpaint_setAntiAlias },
{ "isDither", lpaint_isDither },
{ "isUnderlineText", lpaint_isUnderlineText },
{ "isStrikeThruText", lpaint_isStrikeThruText },
{ "isFakeBoldText", lpaint_isFakeBoldText },
{ "isLinearText", lpaint_isLinearText },
{ "isSubpixelText", lpaint_isSubpixelText },
{ "setSubpixelText", lpaint_setSubpixelText },
{ "isDevKernText", lpaint_isDevKernText },
{ "isLCDRenderText", lpaint_isLCDRenderText },
{ "isEmbeddedBitmapText", lpaint_isEmbeddedBitmapText },
{ "isAutohinted", lpaint_isAutohinted },
{ "isVerticalText", lpaint_isVerticalText },
{ "getAlpha", lpaint_getAlpha },
{ "setAlpha", lpaint_setAlpha },
{ "getColor", lpaint_getColor },
{ "setColor", lpaint_setColor },
{ "getTextSize", lpaint_getTextSize },
{ "setTextSize", lpaint_setTextSize },
{ "getTextScaleX", lpaint_getTextScaleX },
{ "getTextSkewX", lpaint_getTextSkewX },
{ "getTypeface", lpaint_getTypeface },
{ "setTypeface", lpaint_setTypeface },
{ "getHinting", lpaint_getHinting },
{ "getFontID", lpaint_getFontID },
{ "getTextAlign", lpaint_getTextAlign },
{ "setTextAlign", lpaint_setTextAlign },
{ "getStroke", lpaint_getStroke },
{ "setStroke", lpaint_setStroke },
{ "getStrokeCap", lpaint_getStrokeCap },
{ "getStrokeJoin", lpaint_getStrokeJoin },
{ "getTextEncoding", lpaint_getTextEncoding },
{ "getStrokeWidth", lpaint_getStrokeWidth },
{ "setStrokeWidth", lpaint_setStrokeWidth },
{ "getStrokeMiter", lpaint_getStrokeMiter },
{ "measureText", lpaint_measureText },
{ "getFontMetrics", lpaint_getFontMetrics },
{ "getEffects", lpaint_getEffects },
{ "getImageFilter", lpaint_getImageFilter },
{ "setImageFilter", lpaint_setImageFilter },
{ "getShader", lpaint_getShader },
{ "setShader", lpaint_setShader },
{ "getPathEffect", lpaint_getPathEffect },
{ "__gc", lpaint_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static const char* mode2string(SkShader::TileMode mode) {
static const char* gNames[] = { "clamp", "repeat", "mirror" };
SkASSERT((unsigned)mode < SK_ARRAY_COUNT(gNames));
return gNames[mode];
}
static const char* gradtype2string(SkShader::GradientType t) {
static const char* gNames[] = {
"none", "color", "linear", "radial", "radial2", "sweep", "conical"
};
SkASSERT((unsigned)t < SK_ARRAY_COUNT(gNames));
return gNames[t];
}
static int lshader_isOpaque(lua_State* L) {
SkShader* shader = get_ref<SkShader>(L, 1);
return shader && shader->isOpaque();
}
static int lshader_asABitmap(lua_State* L) {
SkShader* shader = get_ref<SkShader>(L, 1);
if (shader) {
SkBitmap bm;
SkMatrix matrix;
SkShader::TileMode modes[2];
switch (shader->asABitmap(&bm, &matrix, modes)) {
case SkShader::kDefault_BitmapType:
lua_newtable(L);
setfield_number(L, "genID", bm.pixelRef() ? bm.pixelRef()->getGenerationID() : 0);
setfield_number(L, "width", bm.width());
setfield_number(L, "height", bm.height());
setfield_string(L, "tileX", mode2string(modes[0]));
setfield_string(L, "tileY", mode2string(modes[1]));
return 1;
default:
break;
}
}
return 0;
}
static int lshader_asAGradient(lua_State* L) {
SkShader* shader = get_ref<SkShader>(L, 1);
if (shader) {
SkShader::GradientInfo info;
sk_bzero(&info, sizeof(info));
SkColor colors[3]; // hacked in for extracting info on 3 color case.
SkScalar pos[3];
info.fColorCount = 3;
info.fColors = &colors[0];
info.fColorOffsets = &pos[0];
SkShader::GradientType t = shader->asAGradient(&info);
if (SkShader::kNone_GradientType != t) {
lua_newtable(L);
setfield_string(L, "type", gradtype2string(t));
setfield_number(L, "colorCount", info.fColorCount);
setfield_string(L, "tile", mode2string(info.fTileMode));
if (info.fColorCount == 3){
setfield_number(L, "midPos", pos[1]);
}
return 1;
}
}
return 0;
}
static int lshader_gc(lua_State* L) {
get_ref<SkShader>(L, 1)->unref();
return 0;
}
static const struct luaL_Reg gSkShader_Methods[] = {
{ "isOpaque", lshader_isOpaque },
{ "asABitmap", lshader_asABitmap },
{ "asAGradient", lshader_asAGradient },
{ "__gc", lshader_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int lpatheffect_asADash(lua_State* L) {
SkPathEffect* pe = get_ref<SkPathEffect>(L, 1);
if (pe) {
SkPathEffect::DashInfo info;
SkPathEffect::DashType dashType = pe->asADash(&info);
if (SkPathEffect::kDash_DashType == dashType) {
SkAutoTArray<SkScalar> intervals(info.fCount);
info.fIntervals = intervals.get();
pe->asADash(&info);
SkLua(L).pushDash(info);
return 1;
}
}
return 0;
}
static int lpatheffect_gc(lua_State* L) {
get_ref<SkPathEffect>(L, 1)->unref();
return 0;
}
static const struct luaL_Reg gSkPathEffect_Methods[] = {
{ "asADash", lpatheffect_asADash },
{ "__gc", lpatheffect_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int lpimagefilter_gc(lua_State* L) {
get_ref<SkImageFilter>(L, 1)->unref();
return 0;
}
static const struct luaL_Reg gSkImageFilter_Methods[] = {
{ "__gc", lpimagefilter_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int lmatrix_getType(lua_State* L) {
SkMatrix::TypeMask mask = get_obj<SkMatrix>(L, 1)->getType();
lua_newtable(L);
setfield_boolean(L, "translate", SkToBool(mask & SkMatrix::kTranslate_Mask));
setfield_boolean(L, "scale", SkToBool(mask & SkMatrix::kScale_Mask));
setfield_boolean(L, "affine", SkToBool(mask & SkMatrix::kAffine_Mask));
setfield_boolean(L, "perspective", SkToBool(mask & SkMatrix::kPerspective_Mask));
return 1;
}
static int lmatrix_getScaleX(lua_State* L) {
lua_pushnumber(L, get_obj<SkMatrix>(L,1)->getScaleX());
return 1;
}
static int lmatrix_getScaleY(lua_State* L) {
lua_pushnumber(L, get_obj<SkMatrix>(L,1)->getScaleY());
return 1;
}
static int lmatrix_getTranslateX(lua_State* L) {
lua_pushnumber(L, get_obj<SkMatrix>(L,1)->getTranslateX());
return 1;
}
static int lmatrix_getTranslateY(lua_State* L) {
lua_pushnumber(L, get_obj<SkMatrix>(L,1)->getTranslateY());
return 1;
}
static int lmatrix_setRectToRect(lua_State* L) {
SkMatrix* matrix = get_obj<SkMatrix>(L, 1);
SkRect srcR, dstR;
lua2rect(L, 2, &srcR);
lua2rect(L, 3, &dstR);
const char* scaleToFitStr = lua_tostring(L, 4);
SkMatrix::ScaleToFit scaleToFit = SkMatrix::kFill_ScaleToFit;
if (scaleToFitStr) {
const struct {
const char* fName;
SkMatrix::ScaleToFit fScaleToFit;
} rec[] = {
{ "fill", SkMatrix::kFill_ScaleToFit },
{ "start", SkMatrix::kStart_ScaleToFit },
{ "center", SkMatrix::kCenter_ScaleToFit },
{ "end", SkMatrix::kEnd_ScaleToFit },
};
for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) {
if (strcmp(rec[i].fName, scaleToFitStr) == 0) {
scaleToFit = rec[i].fScaleToFit;
break;
}
}
}
matrix->setRectToRect(srcR, dstR, scaleToFit);
return 0;
}
static const struct luaL_Reg gSkMatrix_Methods[] = {
{ "getType", lmatrix_getType },
{ "getScaleX", lmatrix_getScaleX },
{ "getScaleY", lmatrix_getScaleY },
{ "getTranslateX", lmatrix_getTranslateX },
{ "getTranslateY", lmatrix_getTranslateY },
{ "setRectToRect", lmatrix_setRectToRect },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int lpath_getBounds(lua_State* L) {
SkLua(L).pushRect(get_obj<SkPath>(L, 1)->getBounds());
return 1;
}
static const char* fill_type_to_str(SkPath::FillType fill) {
switch (fill) {
case SkPath::kEvenOdd_FillType:
return "even-odd";
case SkPath::kWinding_FillType:
return "winding";
case SkPath::kInverseEvenOdd_FillType:
return "inverse-even-odd";
case SkPath::kInverseWinding_FillType:
return "inverse-winding";
}
return "unknown";
}
static int lpath_getFillType(lua_State* L) {
SkPath::FillType fill = get_obj<SkPath>(L, 1)->getFillType();
SkLua(L).pushString(fill_type_to_str(fill));
return 1;
}
static SkString segment_masks_to_str(uint32_t segmentMasks) {
SkString result;
bool first = true;
if (SkPath::kLine_SegmentMask & segmentMasks) {
result.append("line");
first = false;
SkDEBUGCODE(segmentMasks &= ~SkPath::kLine_SegmentMask;)
}
if (SkPath::kQuad_SegmentMask & segmentMasks) {
if (!first) {
result.append(" ");
}
result.append("quad");
first = false;
SkDEBUGCODE(segmentMasks &= ~SkPath::kQuad_SegmentMask;)
}
if (SkPath::kConic_SegmentMask & segmentMasks) {
if (!first) {
result.append(" ");
}
result.append("conic");
first = false;
SkDEBUGCODE(segmentMasks &= ~SkPath::kConic_SegmentMask;)
}
if (SkPath::kCubic_SegmentMask & segmentMasks) {
if (!first) {
result.append(" ");
}
result.append("cubic");
SkDEBUGCODE(segmentMasks &= ~SkPath::kCubic_SegmentMask;)
}
SkASSERT(0 == segmentMasks);
return result;
}
static int lpath_getSegmentTypes(lua_State* L) {
uint32_t segMasks = get_obj<SkPath>(L, 1)->getSegmentMasks();
SkLua(L).pushString(segment_masks_to_str(segMasks));
return 1;
}
static int lpath_isConvex(lua_State* L) {
bool isConvex = SkPath::kConvex_Convexity == get_obj<SkPath>(L, 1)->getConvexity();
SkLua(L).pushBool(isConvex);
return 1;
}
static int lpath_isEmpty(lua_State* L) {
lua_pushboolean(L, get_obj<SkPath>(L, 1)->isEmpty());
return 1;
}
static int lpath_isRect(lua_State* L) {
SkRect r;
bool pred = get_obj<SkPath>(L, 1)->isRect(&r);
int ret_count = 1;
lua_pushboolean(L, pred);
if (pred) {
SkLua(L).pushRect(r);
ret_count += 1;
}
return ret_count;
}
static const char* dir2string(SkPath::Direction dir) {
static const char* gStr[] = {
"unknown", "cw", "ccw"
};
SkASSERT((unsigned)dir < SK_ARRAY_COUNT(gStr));
return gStr[dir];
}
static int lpath_isNestedRects(lua_State* L) {
SkRect rects[2];
SkPath::Direction dirs[2];
bool pred = get_obj<SkPath>(L, 1)->isNestedRects(rects, dirs);
int ret_count = 1;
lua_pushboolean(L, pred);
if (pred) {
SkLua lua(L);
lua.pushRect(rects[0]);
lua.pushRect(rects[1]);
lua_pushstring(L, dir2string(dirs[0]));
lua_pushstring(L, dir2string(dirs[0]));
ret_count += 4;
}
return ret_count;
}
static int lpath_countPoints(lua_State* L) {
lua_pushinteger(L, get_obj<SkPath>(L, 1)->countPoints());
return 1;
}
static int lpath_reset(lua_State* L) {
get_obj<SkPath>(L, 1)->reset();
return 0;
}
static int lpath_moveTo(lua_State* L) {
get_obj<SkPath>(L, 1)->moveTo(lua2scalar(L, 2), lua2scalar(L, 3));
return 0;
}
static int lpath_lineTo(lua_State* L) {
get_obj<SkPath>(L, 1)->lineTo(lua2scalar(L, 2), lua2scalar(L, 3));
return 0;
}
static int lpath_quadTo(lua_State* L) {
get_obj<SkPath>(L, 1)->quadTo(lua2scalar(L, 2), lua2scalar(L, 3),
lua2scalar(L, 4), lua2scalar(L, 5));
return 0;
}
static int lpath_cubicTo(lua_State* L) {
get_obj<SkPath>(L, 1)->cubicTo(lua2scalar(L, 2), lua2scalar(L, 3),
lua2scalar(L, 4), lua2scalar(L, 5),
lua2scalar(L, 6), lua2scalar(L, 7));
return 0;
}
static int lpath_close(lua_State* L) {
get_obj<SkPath>(L, 1)->close();
return 0;
}
static int lpath_gc(lua_State* L) {
get_obj<SkPath>(L, 1)->~SkPath();
return 0;
}
static const struct luaL_Reg gSkPath_Methods[] = {
{ "getBounds", lpath_getBounds },
{ "getFillType", lpath_getFillType },
{ "getSegmentTypes", lpath_getSegmentTypes },
{ "isConvex", lpath_isConvex },
{ "isEmpty", lpath_isEmpty },
{ "isRect", lpath_isRect },
{ "isNestedRects", lpath_isNestedRects },
{ "countPoints", lpath_countPoints },
{ "reset", lpath_reset },
{ "moveTo", lpath_moveTo },
{ "lineTo", lpath_lineTo },
{ "quadTo", lpath_quadTo },
{ "cubicTo", lpath_cubicTo },
{ "close", lpath_close },
{ "__gc", lpath_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static const char* rrect_type(const SkRRect& rr) {
switch (rr.getType()) {
case SkRRect::kUnknown_Type: return "unknown";
case SkRRect::kEmpty_Type: return "empty";
case SkRRect::kRect_Type: return "rect";
case SkRRect::kOval_Type: return "oval";
case SkRRect::kSimple_Type: return "simple";
case SkRRect::kNinePatch_Type: return "nine-patch";
case SkRRect::kComplex_Type: return "complex";
}
SkDEBUGFAIL("never get here");
return "";
}
static int lrrect_rect(lua_State* L) {
SkLua(L).pushRect(get_obj<SkRRect>(L, 1)->rect());
return 1;
}
static int lrrect_type(lua_State* L) {
lua_pushstring(L, rrect_type(*get_obj<SkRRect>(L, 1)));
return 1;
}
static int lrrect_radii(lua_State* L) {
int corner = SkToInt(lua_tointeger(L, 2));
SkVector v;
if (corner < 0 || corner > 3) {
SkDebugf("bad corner index %d", corner);
v.set(0, 0);
} else {
v = get_obj<SkRRect>(L, 1)->radii((SkRRect::Corner)corner);
}
lua_pushnumber(L, v.fX);
lua_pushnumber(L, v.fY);
return 2;
}
static int lrrect_gc(lua_State* L) {
get_obj<SkRRect>(L, 1)->~SkRRect();
return 0;
}
static const struct luaL_Reg gSkRRect_Methods[] = {
{ "rect", lrrect_rect },
{ "type", lrrect_type },
{ "radii", lrrect_radii },
{ "__gc", lrrect_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int limage_width(lua_State* L) {
lua_pushinteger(L, get_ref<SkImage>(L, 1)->width());
return 1;
}
static int limage_height(lua_State* L) {
lua_pushinteger(L, get_ref<SkImage>(L, 1)->height());
return 1;
}
static int limage_gc(lua_State* L) {
get_ref<SkImage>(L, 1)->unref();
return 0;
}
static const struct luaL_Reg gSkImage_Methods[] = {
{ "width", limage_width },
{ "height", limage_height },
{ "__gc", limage_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int lsurface_width(lua_State* L) {
lua_pushinteger(L, get_ref<SkSurface>(L, 1)->width());
return 1;
}
static int lsurface_height(lua_State* L) {
lua_pushinteger(L, get_ref<SkSurface>(L, 1)->height());
return 1;
}
static int lsurface_getCanvas(lua_State* L) {
SkCanvas* canvas = get_ref<SkSurface>(L, 1)->getCanvas();
if (NULL == canvas) {
lua_pushnil(L);
} else {
push_ref(L, canvas);
// note: we don't unref canvas, since getCanvas did not ref it.
// warning: this is weird: now Lua owns a ref on this canvas, but what if they let
// the real owner (the surface) go away, but still hold onto the canvas?
// *really* we want to sort of ref the surface again, but have the native object
// know that it is supposed to be treated as a canvas...
}
return 1;
}
static int lsurface_newImageSnapshot(lua_State* L) {
SkImage* image = get_ref<SkSurface>(L, 1)->newImageSnapshot();
if (NULL == image) {
lua_pushnil(L);
} else {
push_ref(L, image)->unref();
}
return 1;
}
static int lsurface_newSurface(lua_State* L) {
int width = lua2int_def(L, 2, 0);
int height = lua2int_def(L, 3, 0);
SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
SkSurface* surface = get_ref<SkSurface>(L, 1)->newSurface(info);
if (NULL == surface) {
lua_pushnil(L);
} else {
push_ref(L, surface)->unref();
}
return 1;
}
static int lsurface_gc(lua_State* L) {
get_ref<SkSurface>(L, 1)->unref();
return 0;
}
static const struct luaL_Reg gSkSurface_Methods[] = {
{ "width", lsurface_width },
{ "height", lsurface_height },
{ "getCanvas", lsurface_getCanvas },
{ "newImageSnapshot", lsurface_newImageSnapshot },
{ "newSurface", lsurface_newSurface },
{ "__gc", lsurface_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int lpicturerecorder_beginRecording(lua_State* L) {
const SkScalar w = lua2scalar_def(L, 2, -1);
const SkScalar h = lua2scalar_def(L, 3, -1);
if (w <= 0 || h <= 0) {
lua_pushnil(L);
return 1;
}
SkCanvas* canvas = get_obj<SkPictureRecorder>(L, 1)->beginRecording(w, h);
if (NULL == canvas) {
lua_pushnil(L);
return 1;
}
push_ref(L, canvas);
return 1;
}
static int lpicturerecorder_getCanvas(lua_State* L) {
SkCanvas* canvas = get_obj<SkPictureRecorder>(L, 1)->getRecordingCanvas();
if (NULL == canvas) {
lua_pushnil(L);
return 1;
}
push_ref(L, canvas);
return 1;
}
static int lpicturerecorder_endRecording(lua_State* L) {
SkPicture* pic = get_obj<SkPictureRecorder>(L, 1)->endRecording();
if (NULL == pic) {
lua_pushnil(L);
return 1;
}
push_ref(L, pic)->unref();
return 1;
}
static int lpicturerecorder_gc(lua_State* L) {
get_obj<SkPictureRecorder>(L, 1)->~SkPictureRecorder();
return 0;
}
static const struct luaL_Reg gSkPictureRecorder_Methods[] = {
{ "beginRecording", lpicturerecorder_beginRecording },
{ "getCanvas", lpicturerecorder_getCanvas },
{ "endRecording", lpicturerecorder_endRecording },
{ "__gc", lpicturerecorder_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int lpicture_width(lua_State* L) {
lua_pushnumber(L, get_ref<SkPicture>(L, 1)->cullRect().width());
return 1;
}
static int lpicture_height(lua_State* L) {
lua_pushnumber(L, get_ref<SkPicture>(L, 1)->cullRect().height());
return 1;
}
static int lpicture_gc(lua_State* L) {
get_ref<SkPicture>(L, 1)->unref();
return 0;
}
static const struct luaL_Reg gSkPicture_Methods[] = {
{ "width", lpicture_width },
{ "height", lpicture_height },
{ "__gc", lpicture_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
static int ltypeface_gc(lua_State* L) {
SkSafeUnref(get_ref<SkTypeface>(L, 1));
return 0;
}
static const struct luaL_Reg gSkTypeface_Methods[] = {
{ "__gc", ltypeface_gc },
{ NULL, NULL }
};
///////////////////////////////////////////////////////////////////////////////
class AutoCallLua {
public:
AutoCallLua(lua_State* L, const char func[], const char verb[]) : fL(L) {
lua_getglobal(L, func);
if (!lua_isfunction(L, -1)) {
int t = lua_type(L, -1);
SkDebugf("--- expected function %d\n", t);
}
lua_newtable(L);
setfield_string(L, "verb", verb);
}
~AutoCallLua() {
if (lua_pcall(fL, 1, 0, 0) != LUA_OK) {
SkDebugf("lua err: %s\n", lua_tostring(fL, -1));
}
lua_settop(fL, -1);
}
private:
lua_State* fL;
};
#define AUTO_LUA(verb) AutoCallLua acl(fL, fFunc.c_str(), verb)
///////////////////////////////////////////////////////////////////////////////
static int lsk_newDocumentPDF(lua_State* L) {
const char* file = NULL;
if (lua_gettop(L) > 0 && lua_isstring(L, 1)) {
file = lua_tolstring(L, 1, NULL);
}
SkDocument* doc = SkDocument::CreatePDF(file);
if (NULL == doc) {
// do I need to push a nil on the stack and return 1?
return 0;
} else {
push_ref(L, doc)->unref();
return 1;
}
}
static int lsk_newBlurImageFilter(lua_State* L) {
SkScalar sigmaX = lua2scalar_def(L, 1, 0);
SkScalar sigmaY = lua2scalar_def(L, 2, 0);
SkImageFilter* imf = SkBlurImageFilter::Create(sigmaX, sigmaY);
if (NULL == imf) {
lua_pushnil(L);
} else {
push_ref(L, imf)->unref();
}
return 1;
}
static int lsk_newLinearGradient(lua_State* L) {
SkScalar x0 = lua2scalar_def(L, 1, 0);
SkScalar y0 = lua2scalar_def(L, 2, 0);
SkColor c0 = lua2color(L, 3);
SkScalar x1 = lua2scalar_def(L, 4, 0);
SkScalar y1 = lua2scalar_def(L, 5, 0);
SkColor c1 = lua2color(L, 6);
SkPoint pts[] = { { x0, y0 }, { x1, y1 } };
SkColor colors[] = { c0, c1 };
SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode);
if (NULL == s) {
lua_pushnil(L);
} else {
push_ref(L, s)->unref();
}
return 1;
}
static int lsk_newMatrix(lua_State* L) {
push_new<SkMatrix>(L)->reset();
return 1;
}
static int lsk_newPaint(lua_State* L) {
push_new<SkPaint>(L);
return 1;
}
static int lsk_newPath(lua_State* L) {
push_new<SkPath>(L);
return 1;
}
static int lsk_newPictureRecorder(lua_State* L) {
push_new<SkPictureRecorder>(L);
return 1;
}
static int lsk_newRRect(lua_State* L) {
push_new<SkRRect>(L)->setEmpty();
return 1;
}
static int lsk_newTypeface(lua_State* L) {
const char* name = NULL;
int style = SkTypeface::kNormal;
int count = lua_gettop(L);
if (count > 0 && lua_isstring(L, 1)) {
name = lua_tolstring(L, 1, NULL);
if (count > 1 && lua_isnumber(L, 2)) {
style = lua_tointegerx(L, 2, NULL) & SkTypeface::kBoldItalic;
}
}
SkTypeface* face = SkTypeface::CreateFromName(name,
(SkTypeface::Style)style);
// SkDebugf("---- name <%s> style=%d, face=%p ref=%d\n", name, style, face, face->getRefCnt());
if (NULL == face) {
face = SkTypeface::RefDefault();
}
push_ref(L, face)->unref();
return 1;
}
static int lsk_newRasterSurface(lua_State* L) {
int width = lua2int_def(L, 2, 0);
int height = lua2int_def(L, 2, 0);
SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
SkSurface* surface = SkSurface::NewRaster(info);
if (NULL == surface) {
lua_pushnil(L);
} else {
push_ref(L, surface)->unref();
}
return 1;
}
static int lsk_loadImage(lua_State* L) {
if (lua_gettop(L) > 0 && lua_isstring(L, 1)) {
const char* name = lua_tolstring(L, 1, NULL);
SkAutoDataUnref data(SkData::NewFromFileName(name));
if (data.get()) {
SkImage* image = SkImage::NewFromGenerator(
SkDecodingImageGenerator::Create(data, SkDecodingImageGenerator::Options()));
if (image) {
push_ref(L, image)->unref();
return 1;
}
}
}
return 0;
}
static void register_Sk(lua_State* L) {
lua_newtable(L);
lua_pushvalue(L, -1);
lua_setglobal(L, "Sk");
// the Sk table is still on top
setfield_function(L, "newDocumentPDF", lsk_newDocumentPDF);
setfield_function(L, "loadImage", lsk_loadImage);
setfield_function(L, "newBlurImageFilter", lsk_newBlurImageFilter);
setfield_function(L, "newLinearGradient", lsk_newLinearGradient);
setfield_function(L, "newMatrix", lsk_newMatrix);
setfield_function(L, "newPaint", lsk_newPaint);
setfield_function(L, "newPath", lsk_newPath);
setfield_function(L, "newPictureRecorder", lsk_newPictureRecorder);
setfield_function(L, "newRRect", lsk_newRRect);
setfield_function(L, "newRasterSurface", lsk_newRasterSurface);
setfield_function(L, "newTypeface", lsk_newTypeface);
lua_pop(L, 1); // pop off the Sk table
}
#define REG_CLASS(L, C) \
do { \
luaL_newmetatable(L, get_mtname<C>()); \
lua_pushvalue(L, -1); \
lua_setfield(L, -2, "__index"); \
luaL_setfuncs(L, g##C##_Methods, 0); \
lua_pop(L, 1); /* pop off the meta-table */ \
} while (0)
void SkLua::Load(lua_State* L) {
register_Sk(L);
REG_CLASS(L, SkCanvas);
REG_CLASS(L, SkDocument);
REG_CLASS(L, SkImage);
REG_CLASS(L, SkImageFilter);
REG_CLASS(L, SkPaint);
REG_CLASS(L, SkPath);
REG_CLASS(L, SkPathEffect);
REG_CLASS(L, SkPicture);
REG_CLASS(L, SkPictureRecorder);
REG_CLASS(L, SkRRect);
REG_CLASS(L, SkShader);
REG_CLASS(L, SkSurface);
REG_CLASS(L, SkTypeface);
REG_CLASS(L, SkMatrix);
}
extern "C" int luaopen_skia(lua_State* L);
extern "C" int luaopen_skia(lua_State* L) {
SkLua::Load(L);
return 0;
}
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