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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
// GL Functor data types into the types the chromium stack expects, and back.
#define LOG_TAG "webviewchromium_plat_support"
#include "android_webview/public/browser/draw_gl.h"
#include <jni.h>
#include <private/hwui/DrawGlInfo.h>
#include <utils/Functor.h>
#include <utils/Log.h>
#define NELEM(x) ((int) (sizeof(x) / sizeof((x)[0])))
#define COMPILE_ASSERT(expr, err) static const char err[(expr) ? 1 : -1] = "";
namespace android {
namespace {
AwDrawGLFunction* g_aw_drawgl_function = NULL;
class DrawGLFunctor : public Functor {
public:
DrawGLFunctor(jint view_context) : view_context_(view_context) {}
virtual ~DrawGLFunctor() {}
// Functor
virtual status_t operator ()(int what, void* data) {
using uirenderer::DrawGlInfo;
if (!g_aw_drawgl_function) {
ALOGE("Cannot draw: no DrawGL Function installed");
return DrawGlInfo::kStatusDone;
}
AwDrawGLInfo aw_info;
aw_info.mode = (what == DrawGlInfo::kModeProcess) ?
AwDrawGLInfo::kModeProcess : AwDrawGLInfo::kModeDraw;
DrawGlInfo* gl_info = reinterpret_cast<DrawGlInfo*>(data);
// Map across the input values.
aw_info.clip_left = gl_info->clipLeft;
aw_info.clip_top = gl_info->clipTop;
aw_info.clip_right = gl_info->clipRight;
aw_info.clip_bottom = gl_info->clipBottom;
aw_info.width = gl_info->width;
aw_info.height = gl_info->height;
aw_info.is_layer = gl_info->isLayer;
COMPILE_ASSERT(NELEM(aw_info.transform) == NELEM(gl_info->transform),
mismatched_transform_matrix_sizes);
for (int i = 0; i < NELEM(aw_info.transform); ++i) {
aw_info.transform[i] = gl_info->transform[i];
}
// Also pre-initialize the output fields in case the implementation does
// not modify them.
aw_info.status_mask = AwDrawGLInfo::kStatusMaskDone;
aw_info.dirty_left = gl_info->dirtyLeft;
aw_info.dirty_top = gl_info->dirtyTop;
aw_info.dirty_right = gl_info->dirtyRight;
aw_info.dirty_bottom = gl_info->dirtyBottom;
// Invoke the DrawGL method.
g_aw_drawgl_function(view_context_, &aw_info, NULL);
// Copy out the outputs.
gl_info->dirtyLeft = aw_info.dirty_left;
gl_info->dirtyTop = aw_info.dirty_top;
gl_info->dirtyRight = aw_info.dirty_right;
gl_info->dirtyBottom = aw_info.dirty_bottom;
// Calculate the return code.
status_t res = DrawGlInfo::kStatusDone;
if (aw_info.status_mask & AwDrawGLInfo::kStatusMaskDraw)
res |= DrawGlInfo::kStatusDraw;
if (aw_info.status_mask & AwDrawGLInfo::kStatusMaskInvoke)
res |= DrawGlInfo::kStatusInvoke;
return res;
}
private:
int view_context_;
};
jint CreateGLFunctor(JNIEnv*, jclass, jint view_context) {
return reinterpret_cast<jint>(new DrawGLFunctor(view_context));
}
void DestroyGLFunctor(JNIEnv*, jclass, jint functor) {
delete reinterpret_cast<DrawGLFunctor*>(functor);
}
void SetChromiumAwDrawGLFunction(JNIEnv*, jclass, jint draw_function) {
g_aw_drawgl_function = reinterpret_cast<AwDrawGLFunction*>(draw_function);
}
const char kClassName[] = "com/android/webview/chromium/DrawGLFunctor";
const JNINativeMethod kJniMethods[] = {
{ "nativeCreateGLFunctor", "(I)I",
reinterpret_cast<void*>(CreateGLFunctor), },
{ "nativeDestroyGLFunctor", "(I)V",
reinterpret_cast<void*>(DestroyGLFunctor), },
{ "nativeSetChromiumAwDrawGLFunction", "(I)V",
reinterpret_cast<void*>(SetChromiumAwDrawGLFunction), },
};
} // namespace
void RegisterDrawGLFunctor(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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