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/*
* 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 "org_skia_canvasproof_GaneshPictureRenderer.h"
#include "GrContext.h"
#include "JavaInputStream.h"
#include "SkCanvas.h"
#include "SkMatrix.h"
#include "SkPicture.h"
#include "SkRect.h"
#include "SkStream.h"
#include "SkSurface.h"
#define TAG "GaneshPictureRenderer.cpp: "
static void render_picture(GrContext* grContext,
int width,
int height,
const SkPicture* picture,
const SkMatrix& matrix) {
SkASSERT(grContext);
if (!picture) {
SkDebugf(TAG "!picture\n");
return;
}
// Render to the default framebuffer render target.
GrBackendRenderTargetDesc desc;
desc.fWidth = width;
desc.fHeight = height;
desc.fConfig = kSkia8888_GrPixelConfig;
desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
SkSurfaceProps surfaceProps(SkSurfaceProps::kUseDeviceIndependentFonts_Flag,
kUnknown_SkPixelGeometry);
// TODO: Check to see if we can keep the surface between draw calls.
SkAutoTUnref<SkSurface> surface(
SkSurface::NewFromBackendRenderTarget(
grContext, desc, &surfaceProps));
if (surface) {
SkCanvas* canvas = surface->getCanvas();
SkASSERT(canvas);
canvas->clear(SK_ColorGRAY);
canvas->concat(matrix);
SkRect cullRect = picture->cullRect();
canvas->clipRect(cullRect);
picture->playback(canvas);
canvas->flush();
}
}
namespace {
struct GaneshPictureRendererImpl {
SkAutoTUnref<GrContext> fGrContext;
void render(int w, int h, const SkPicture* p, const SkMatrix& m) {
if (!fGrContext) {
// Cache the rendering context between frames.
fGrContext.reset(GrContext::Create(kOpenGL_GrBackend, 0));
if (!fGrContext) {
SkDebugf(TAG "GrContext::Create - failed\n");
return;
}
}
render_picture(fGrContext, w, h, p, m);
}
};
} // namespace
/*
* Class: org_skia_canvasproof_GaneshPictureRenderer
* Method: DrawThisFrame
* Signature: (IIFJ)V
*/
JNIEXPORT void JNICALL Java_org_skia_canvasproof_GaneshPictureRenderer_DrawThisFrame(
JNIEnv*, jclass, jint width, jint height, jfloat scale, jlong ptr, jlong pic) {
if (!ptr) { return; }
SkMatrix matrix = SkMatrix::MakeScale((SkScalar)scale);
GaneshPictureRendererImpl* impl =
reinterpret_cast<GaneshPictureRendererImpl*>(ptr);
SkPicture* picture = reinterpret_cast<SkPicture*>(pic);
impl->render((int)width, (int)height, picture, matrix);
}
/*
* Class: org_skia_canvasproof_GaneshPictureRenderer
* Method: Ctor
* Signature: ()J
*/
JNIEXPORT jlong JNICALL Java_org_skia_canvasproof_GaneshPictureRenderer_Ctor
(JNIEnv *, jclass) {
return reinterpret_cast<jlong>(new GaneshPictureRendererImpl);
}
/*
* Class: org_skia_canvasproof_GaneshPictureRenderer
* Method: CleanUp
* Signature: (J)V
*/
JNIEXPORT void JNICALL Java_org_skia_canvasproof_GaneshPictureRenderer_CleanUp
(JNIEnv *, jclass, jlong ptr) {
delete reinterpret_cast<GaneshPictureRendererImpl*>(ptr);
}
namespace {
struct AndroidRectHelper {
jfieldID fLeft, fTop, fRight, fBottom;
AndroidRectHelper()
: fLeft(nullptr), fTop(nullptr), fRight(nullptr), fBottom(nullptr) {}
void config(JNIEnv *env) {
if (!fLeft) {
jclass rectClass = env->FindClass("android/graphics/Rect");
SkASSERT(rectClass);
fLeft = env->GetFieldID(rectClass, "left", "I");
fTop = env->GetFieldID(rectClass, "top", "I");
fRight = env->GetFieldID(rectClass, "right", "I");
fBottom = env->GetFieldID(rectClass, "bottom", "I");
}
}
};
} // namespace
/*
* Class: org_skia_canvasproof_GaneshPictureRenderer
* Method: GetCullRect
* Signature: (Landroid/graphics/Rect;J)V
*/
JNIEXPORT void JNICALL Java_org_skia_canvasproof_GaneshPictureRenderer_GetCullRect
(JNIEnv *env, jclass, jobject androidGraphicsRect, jlong picturePtr) {
SkASSERT(androidGraphicsRect);
const SkPicture* picture = reinterpret_cast<SkPicture*>(picturePtr);
SkRect rect = SkRect::MakeEmpty();
if (picture) {
rect = picture->cullRect();
}
SkIRect iRect;
rect.roundOut(&iRect);
static AndroidRectHelper help;
help.config(env);
env->SetIntField(androidGraphicsRect, help.fLeft, (jint)(iRect.left()));
env->SetIntField(androidGraphicsRect, help.fTop, (jint)(iRect.top()));
env->SetIntField(androidGraphicsRect, help.fRight, (jint)(iRect.right()));
env->SetIntField(androidGraphicsRect, help.fBottom, (jint)(iRect.bottom()));
}
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