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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Provides a webviewchromium glue layer adapter from the internal Android
// graphics types into the types the chromium stack expects, and back.
#define LOG_TAG "webviewchromium_plat_support"
#include "draw_gl.h"
#include "draw_sw.h"
#include <cstdlib>
#include <jni.h>
#include <utils/Log.h>
#include "graphic_buffer_impl.h"
#include "GraphicsJNI.h"
#include "SkCanvasStateUtils.h"
#include "SkGraphics.h"
#include "SkPicture.h"
#define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
namespace android {
namespace {
class PixelInfo : public AwPixelInfo {
public:
explicit PixelInfo(SkCanvas* canvas);
~PixelInfo();
};
PixelInfo::PixelInfo(SkCanvas* canvas) {
memset(this, 0, sizeof(AwPixelInfo));
version = kAwPixelInfoVersion;
state = SkCanvasStateUtils::CaptureCanvasState(canvas);
}
PixelInfo::~PixelInfo() {
if (state)
SkCanvasStateUtils::ReleaseCanvasState(state);
}
AwPixelInfo* GetPixels(JNIEnv* env, jobject java_canvas) {
android::Canvas* nativeCanvas = GraphicsJNI::getNativeCanvas(env, java_canvas);
if (!nativeCanvas)
return NULL;
SkCanvas* canvas = nativeCanvas->asSkCanvas();
if (!canvas)
return NULL;
// Workarounds for http://crbug.com/271096: SW draw only supports
// translate & scale transforms, and a simple rectangular clip.
// (This also avoids significant wasted time in calling
// SkCanvasStateUtils::CaptureCanvasState when the clip is complex).
if (!canvas->isClipRect() ||
(canvas->getTotalMatrix().getType() &
~(SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask))) {
return NULL;
}
PixelInfo* pixels = new PixelInfo(canvas);
if (!pixels->state) {
delete pixels;
pixels = NULL;
}
return pixels;
}
void ReleasePixels(AwPixelInfo* pixels) {
delete static_cast<PixelInfo*>(pixels);
}
jlong GetDrawSWFunctionTable(JNIEnv* env, jclass) {
static AwDrawSWFunctionTable function_table;
function_table.version = kAwDrawSWFunctionTableVersion;
function_table.access_pixels = &GetPixels;
function_table.release_pixels = &ReleasePixels;
return reinterpret_cast<intptr_t>(&function_table);
}
jlong GetDrawGLFunctionTable(JNIEnv* env, jclass) {
static AwDrawGLFunctionTable function_table;
function_table.version = kAwDrawGLFunctionTableVersion;
function_table.create_graphic_buffer = &GraphicBufferImpl::Create;
function_table.release_graphic_buffer = &GraphicBufferImpl::Release;
function_table.map = &GraphicBufferImpl::MapStatic;
function_table.unmap = &GraphicBufferImpl::UnmapStatic;
function_table.get_native_buffer = &GraphicBufferImpl::GetNativeBufferStatic;
function_table.get_stride = &GraphicBufferImpl::GetStrideStatic;
return reinterpret_cast<intptr_t>(&function_table);
}
const char kClassName[] = "com/android/webview/chromium/GraphicsUtils";
const JNINativeMethod kJniMethods[] = {
{ "nativeGetDrawSWFunctionTable", "()J",
reinterpret_cast<void*>(GetDrawSWFunctionTable) },
{ "nativeGetDrawGLFunctionTable", "()J",
reinterpret_cast<void*>(GetDrawGLFunctionTable) },
};
} // namespace
void RegisterGraphicsUtils(JNIEnv* env) {
jclass clazz = env->FindClass(kClassName);
LOG_ALWAYS_FATAL_IF(!clazz, "Unable to find class '%s'", kClassName);
int res = env->RegisterNatives(clazz, kJniMethods, NELEM(kJniMethods));
LOG_ALWAYS_FATAL_IF(res < 0, "register native methods failed: res=%d", res);
}
} // namespace android
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