add gm for image->newShader
BUG=skia:
TBR=
Review URL: https://codereview.chromium.org/1302943004
diff --git a/src/utils/SkImageGeneratorUtils.cpp b/src/utils/SkImageGeneratorUtils.cpp
new file mode 100644
index 0000000..f5198c0
--- /dev/null
+++ b/src/utils/SkImageGeneratorUtils.cpp
@@ -0,0 +1,134 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkImageGeneratorUtils.h"
+#include "SkBitmap.h"
+
+class GeneratorFromEmpty : public SkImageGenerator {
+public:
+ GeneratorFromEmpty(const SkImageInfo& info) : SkImageGenerator(info) {}
+};
+
+SkImageGenerator* SkImageGeneratorUtils::NewEmpty(const SkImageInfo& info) {
+ return SkNEW_ARGS(GeneratorFromEmpty, (info));
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+class GeneratorFromBitmap : public SkImageGenerator {
+public:
+ GeneratorFromBitmap(const SkBitmap& bm) : SkImageGenerator(bm.info()), fBM(bm) {
+ if (!bm.isImmutable()) {
+ bm.copyTo(&fBM);
+ }
+ }
+
+protected:
+ bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
+ SkPMColor*, int*) override {
+ return fBM.readPixels(info, pixels, rowBytes, 0, 0);
+ }
+
+private:
+ SkBitmap fBM;
+};
+
+SkImageGenerator* SkImageGeneratorUtils::NewFromBitmap(const SkBitmap& bm) {
+ return SkNEW_ARGS(GeneratorFromBitmap, (bm));
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#if SK_SUPPORT_GPU
+
+#include "GrContext.h"
+#include "GrTexture.h"
+#include "SkGr.h"
+
+class GeneratorFromTexture : public SkImageGenerator {
+public:
+ GeneratorFromTexture(GrContext* ctx, GrTexture* tex, const SkImageInfo& info)
+ : SkImageGenerator(info), fCtx(ctx), fTexture(tex)
+ {}
+
+protected:
+ GrTexture* onGenerateTexture(GrContext* ctx, SkImageUsageType, const SkIRect* subset) override {
+ if (ctx) {
+ SkASSERT(ctx == fCtx.get());
+ }
+
+ if (!subset) {
+ return SkRef(fTexture.get());
+ }
+ // need to copy the subset into a new texture
+ GrSurfaceDesc desc = fTexture->desc();
+ desc.fWidth = subset->width();
+ desc.fHeight = subset->height();
+
+ GrTexture* dst = fCtx->textureProvider()->createTexture(desc, false);
+ fCtx->copySurface(dst, fTexture, *subset, SkIPoint::Make(0, 0));
+ return dst;
+ }
+private:
+ SkAutoTUnref<GrContext> fCtx;
+ SkAutoTUnref<GrTexture> fTexture;
+};
+#endif
+
+SkImageGenerator* SkImageGeneratorUtils::NewFromTexture(GrContext* ctx, GrTexture* tex) {
+#if SK_SUPPORT_GPU
+ if (ctx && tex) {
+ const GrSurfaceDesc desc = tex->desc();
+
+ SkColorType ct;
+ SkColorProfileType cpt;
+ if (!GrPixelConfig2ColorAndProfileType(desc.fConfig, &ct, &cpt)) {
+ return nullptr;
+ }
+ const SkAlphaType at = kPremul_SkAlphaType; // take isOpaque from caller?
+ SkImageInfo info = SkImageInfo::Make(desc.fWidth, desc.fHeight, ct, at, cpt);
+ return SkNEW_ARGS(GeneratorFromTexture, (ctx, tex, info));
+ }
+#endif
+ return nullptr;
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#include "SkImage.h"
+
+class GeneratorFromImage : public SkImageGenerator {
+public:
+ GeneratorFromImage(const SkImage* image, const SkImageInfo& info)
+ : SkImageGenerator(info), fImage(image) {}
+
+protected:
+ bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
+ SkPMColor*, int*) override {
+ return fImage->readPixels(info, pixels, rowBytes, 0, 0);
+ }
+
+ GrTexture* onGenerateTexture(GrContext* ctx, SkImageUsageType, const SkIRect* subset) override {
+ // waiting on https://code.google.com/p/skia/issues/detail?id=4233
+ return nullptr;
+ }
+
+private:
+ SkAutoTUnref<const SkImage> fImage;
+};
+
+SkImageGenerator* SkImageGeneratorUtils::NewFromImage(const SkImage* image) {
+ if (image) {
+ const SkColorType ct = kN32_SkColorType;
+ const SkAlphaType at = image->isOpaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
+ const SkImageInfo info = SkImageInfo::Make(image->width(), image->height(), ct, at);
+ return SkNEW_ARGS(GeneratorFromImage, (image, info));
+ }
+ return nullptr;
+}
+
+