initial impl of SkImageFilters : virtual signature will change!
Do not invest too much in other subclasses until this API solidifies.
git-svn-id: http://skia.googlecode.com/svn/trunk@2903 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/effects/SkTestImageFilters.h b/include/effects/SkTestImageFilters.h
new file mode 100755
index 0000000..4ec697e
--- /dev/null
+++ b/include/effects/SkTestImageFilters.h
@@ -0,0 +1,157 @@
+
+#ifndef _SkTestImageFilters_h
+#define _SkTestImageFilters_h
+
+#include "SkImageFilter.h"
+
+class SkOffsetImageFilter : public SkImageFilter {
+public:
+ SkOffsetImageFilter(SkScalar dx, SkScalar dy) {
+ fOffset.set(dx, dy);
+ }
+
+ static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
+ return SkNEW_ARGS(SkOffsetImageFilter, (buffer));
+ }
+
+protected:
+ SkOffsetImageFilter(SkFlattenableReadBuffer& buffer);
+
+ virtual bool onFilterImage(const SkBitmap& src, const SkMatrix&,
+ SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
+ virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) SK_OVERRIDE;
+ // overrides from SkFlattenable
+ virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE;
+ virtual Factory getFactory() SK_OVERRIDE;
+
+private:
+ SkVector fOffset;
+
+ typedef SkImageFilter INHERITED;
+};
+
+class SkComposeImageFilter : public SkImageFilter {
+public:
+ SkComposeImageFilter(SkImageFilter* outer, SkImageFilter* inner) {
+ fOuter = outer;
+ fInner = inner;
+ SkSafeRef(outer);
+ SkSafeRef(inner);
+ }
+ virtual ~SkComposeImageFilter();
+
+ static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
+ return SkNEW_ARGS(SkComposeImageFilter, (buffer));
+ }
+
+protected:
+ SkComposeImageFilter(SkFlattenableReadBuffer& buffer);
+
+ virtual bool onFilterImage(const SkBitmap& src, const SkMatrix&,
+ SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
+ virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) SK_OVERRIDE;
+ // overrides from SkFlattenable
+ virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE;
+ virtual Factory getFactory() SK_OVERRIDE;
+
+private:
+ SkImageFilter* fOuter;
+ SkImageFilter* fInner;
+
+ typedef SkImageFilter INHERITED;
+};
+
+#include "SkXfermode.h"
+
+class SkMergeImageFilter : public SkImageFilter {
+public:
+ SkMergeImageFilter(SkImageFilter* first, SkImageFilter* second,
+ SkXfermode::Mode = SkXfermode::kSrcOver_Mode);
+ SkMergeImageFilter(SkImageFilter* const filters[], int count,
+ const SkXfermode::Mode modes[] = NULL);
+ virtual ~SkMergeImageFilter();
+
+ static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
+ return SkNEW_ARGS(SkMergeImageFilter, (buffer));
+ }
+
+protected:
+ SkMergeImageFilter(SkFlattenableReadBuffer& buffer);
+
+ virtual bool onFilterImage(const SkBitmap& src, const SkMatrix&,
+ SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
+ virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) SK_OVERRIDE;
+ // overrides from SkFlattenable
+ virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE;
+ virtual Factory getFactory() SK_OVERRIDE;
+
+private:
+ SkImageFilter** fFilters;
+ uint8_t* fModes; // SkXfermode::Mode
+ int fCount;
+
+ // private storage, to avoid dynamically allocating storage for our copy
+ // of the filters and modes (unless fCount is so large we can't fit).
+ intptr_t fStorage[16];
+
+ void initAlloc(int count, bool hasModes);
+ void init(SkImageFilter* const [], int count, const SkXfermode::Mode []);
+
+ typedef SkImageFilter INHERITED;
+};
+
+class SkColorFilter;
+
+class SkColorFilterImageFilter : public SkImageFilter {
+public:
+ SkColorFilterImageFilter(SkColorFilter* cf) : fColorFilter(cf) {
+ SkSafeRef(cf);
+ }
+ virtual ~SkColorFilterImageFilter();
+
+ static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
+ return SkNEW_ARGS(SkColorFilterImageFilter, (buffer));
+ }
+
+protected:
+ SkColorFilterImageFilter(SkFlattenableReadBuffer& buffer);
+
+ virtual bool onFilterImage(const SkBitmap& src, const SkMatrix&,
+ SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
+ // overrides from SkFlattenable
+ virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE;
+ virtual Factory getFactory() SK_OVERRIDE;
+
+private:
+ SkColorFilter* fColorFilter;
+
+ typedef SkImageFilter INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+// Fun mode that scales down (only) and then scales back up to look pixelated
+class SkDownSampleImageFilter : public SkImageFilter {
+public:
+ SkDownSampleImageFilter(SkScalar scale) : fScale(scale) {}
+
+ static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
+ return SkNEW_ARGS(SkDownSampleImageFilter, (buffer));
+ }
+
+protected:
+ SkDownSampleImageFilter(SkFlattenableReadBuffer& buffer);
+
+ virtual bool onFilterImage(const SkBitmap& src, const SkMatrix&,
+ SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
+ // overrides from SkFlattenable
+ virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE;
+ virtual Factory getFactory() SK_OVERRIDE;
+
+private:
+ SkScalar fScale;
+
+ typedef SkImageFilter INHERITED;
+};
+
+#endif