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65 lines
1.5 KiB
65 lines
1.5 KiB
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//
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// canvas.h
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//
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// Copyright (c) 2010 LearnBoost <tj@learnboost.com>
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//
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#ifndef __NODE_CANVAS_H__
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#define __NODE_CANVAS_H__
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#include <v8.h>
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#include <node.h>
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#include <node_object_wrap.h>
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#include <cairo.h>
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using namespace v8;
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/*
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* Maxmimum states per context.
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* TODO: remove/resize
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*/
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#ifndef CANVAS_MAX_STATES
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#define CANVAS_MAX_STATES 64
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#endif
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/*
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* RGBA arg assertions.
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*/
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#define RGBA_ARGS(N) \
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if (!args[N]->IsNumber()) \
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return ThrowException(Exception::TypeError(String::New("r required"))); \
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if (!args[N+1]->IsNumber()) \
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return ThrowException(Exception::TypeError(String::New("g required"))); \
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if (!args[N+2]->IsNumber()) \
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return ThrowException(Exception::TypeError(String::New("b required"))); \
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if (!args[N+3]->IsNumber()) \
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return ThrowException(Exception::TypeError(String::New("alpha required"))); \
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float r = args[N]->Int32Value(); \
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float g = args[N+1]->Int32Value(); \
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float b = args[N+2]->Int32Value(); \
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float a = args[N+3]->NumberValue();
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/*
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* Canvas.
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*/
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class Canvas: public node::ObjectWrap {
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public:
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static void Initialize(Handle<Object> target);
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static Handle<Value> New(const Arguments &args);
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static Handle<Value> SavePNG(const Arguments &args);
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static Handle<Value> StreamPNG(const Arguments &args);
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static Handle<Value> Error(cairo_status_t status);
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inline cairo_surface_t *getSurface(){ return _surface; }
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static void blur(cairo_surface_t *surface, int radius);
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Canvas(int width, int height);
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private:
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~Canvas();
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cairo_surface_t *_surface;
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};
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#endif
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