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/*
* Copyright (c) 2011 The Chromium Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* NaCl Earth demo */
/* Pepper code in C */
#include "native_client/tests/earth/earth.h"
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
/* Pepper includes */
#include "ppapi/c/pp_completion_callback.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/c/pp_instance.h"
#include "ppapi/c/pp_module.h"
#include "ppapi/c/pp_point.h"
#include "ppapi/c/pp_rect.h"
#include "ppapi/c/pp_size.h"
#include "ppapi/c/ppb_core.h"
#include "ppapi/c/ppb_graphics_2d.h"
#include "ppapi/c/ppb_image_data.h"
#include "ppapi/c/ppb_instance.h"
#include "ppapi/c/ppb_view.h"
#include "ppapi/c/ppp.h"
#include "ppapi/c/ppp_instance.h"
#define NUMBER_OF_IMAGES 2
PPB_GetInterface g_get_browser_interface = NULL;
/* NOTE on PP_Instance: In general Pepper is designed such that a
* single plugin process can implement multiple plugin instances.
* This might occur, for example, if a plugin were instantiated by
* multiple <embed ...> tags in a single page.
*
* This implementation assumes at most one instance per plugin,
* consistent with limitations of the current implementation of
* Native Client.
*/
struct PepperState {
const struct PPB_Core* core_interface;
const struct PPB_Graphics2D* graphics_2d_interface;
const struct PPB_ImageData* image_data_interface;
const struct PPB_Instance* instance_interface;
const struct PPB_View* view_interface;
PP_Resource device_context;
int32_t which_image;
PP_Resource image[NUMBER_OF_IMAGES];
uint32_t* image_data[NUMBER_OF_IMAGES];
PP_Instance instance;
struct PP_Rect position;
bool ready;
};
struct PepperState g_MyState;
bool g_MyStateIsValid = false;
static void Repaint(struct PepperState *mystate);
static void FlushCompletionCallback(void* user_data, int32_t result) {
Repaint((struct PepperState*)user_data);
}
static void Repaint(struct PepperState *mystate) {
struct PP_Point topleft = PP_MakePoint(0, 0);
struct PP_Rect rect = PP_MakeRectFromXYWH(0, 0,
mystate->position.size.width,
mystate->position.size.height);
int show, render;
/* Wait for previous rendering (if applicable) to finish */
Earth_Sync();
/* Double buffer - show previously rendered image. */
show = mystate->which_image;
mystate->graphics_2d_interface->PaintImageData(mystate->device_context,
mystate->image[show],
&topleft, &rect);
int32_t ret;
ret = mystate->graphics_2d_interface->Flush(mystate->device_context,
PP_MakeCompletionCallback(&FlushCompletionCallback, mystate));
/* Start Rendering into the other image while presenting. */
render = (mystate->which_image + 1) % NUMBER_OF_IMAGES;
Earth_Draw(mystate->image_data[render],
mystate->position.size.width,
mystate->position.size.height);
/* In next callback, show what was rendered. */
mystate->which_image = render;
}
static PP_Bool Instance_DidCreate(PP_Instance instance,
uint32_t argc,
const char* argn[],
const char* argv[]) {
assert(g_MyStateIsValid == false);
DebugPrintf("Creating instance %x\n", instance);
g_MyState.instance = instance;
g_MyState.ready = false;
g_MyStateIsValid = true;
Earth_Init(argc, argn, argv);
return PP_TRUE;
}
static void Instance_DidDestroy(PP_Instance instance) {
assert(g_MyState.instance == instance && g_MyStateIsValid == true);
g_MyStateIsValid = false;
}
/* Returns a refed resource corresponding to the created device context. */
static PP_Resource MakeAndBindDeviceContext(PP_Instance instance,
const struct PP_Size* size) {
PP_Resource device_context;
device_context =
g_MyState.graphics_2d_interface->Create(instance, size, PP_FALSE);
if (!device_context) return 0;
if (!g_MyState.instance_interface->BindGraphics(instance, device_context)) {
g_MyState.core_interface->ReleaseResource(device_context);
return 0;
}
return device_context;
}
static void Instance_DidChangeView(PP_Instance pp_instance,
PP_Resource pp_view) {
DebugPrintf("DidChangeView(%x)\n", pp_instance);
assert(g_MyStateIsValid == true);
assert(g_MyState.instance == pp_instance);
g_MyState.view_interface->GetRect(pp_view, &g_MyState.position);
if (g_MyState.ready == false) {
g_MyState.device_context =
MakeAndBindDeviceContext(pp_instance, &g_MyState.position.size);
/* create device context */
if (!g_MyState.device_context) {
DebugPrintf("device_context is null!\n");
return;
}
/*
* Create double-buffered image data.
* Note: This example does not use transparent pixels. All pixels are
* written into the framebuffer with alpha set to 255 (opaque)
* Note: Pepper uses premultiplied alpha.
*/
g_MyState.which_image = 0;
for (int i = 0; i < NUMBER_OF_IMAGES; ++i) {
g_MyState.image[i] =
g_MyState.image_data_interface->Create(pp_instance,
PP_IMAGEDATAFORMAT_BGRA_PREMUL, &g_MyState.position.size, PP_TRUE);
if (!g_MyState.image[i]) {
DebugPrintf("image resource is invalid!\n");
return;
}
g_MyState.image_data[i] =
(uint32_t*)g_MyState.image_data_interface->Map(g_MyState.image[i]);
if (!g_MyState.image_data[i]) {
DebugPrintf("could not allocate image_data\n");
return;
}
size_t size_in_bytes = g_MyState.position.size.width *
g_MyState.position.size.height * sizeof(uint32_t);
memset(g_MyState.image_data[i], 0, size_in_bytes);
}
g_MyState.ready = true;
Repaint(&g_MyState);
}
}
static void Instance_DidChangeFocus(PP_Instance pp_instance,
PP_Bool has_focus) {
}
static PP_Bool Instance_HandleDocumentLoad(PP_Instance pp_instance,
PP_Resource pp_url_loader) {
return PP_FALSE;
}
static struct PPP_Instance instance_interface = {
&Instance_DidCreate,
&Instance_DidDestroy,
&Instance_DidChangeView,
&Instance_DidChangeFocus,
&Instance_HandleDocumentLoad
};
/* Global entrypoints --------------------------------------------------------*/
PP_EXPORT int32_t PPP_InitializeModule(PP_Module module,
PPB_GetInterface get_browser_interface) {
g_get_browser_interface = get_browser_interface;
g_MyState.core_interface = (const struct PPB_Core*)
get_browser_interface(PPB_CORE_INTERFACE);
g_MyState.instance_interface = (const struct PPB_Instance*)
get_browser_interface(PPB_INSTANCE_INTERFACE);
g_MyState.image_data_interface = (const struct PPB_ImageData*)
get_browser_interface(PPB_IMAGEDATA_INTERFACE);
g_MyState.graphics_2d_interface = (const struct PPB_Graphics2D*)
get_browser_interface(PPB_GRAPHICS_2D_INTERFACE);
g_MyState.view_interface = (const struct PPB_View*)
get_browser_interface(PPB_VIEW_INTERFACE);
if (!g_MyState.core_interface ||
!g_MyState.instance_interface ||
!g_MyState.image_data_interface ||
!g_MyState.graphics_2d_interface ||
!g_MyState.view_interface)
return -1;
return PP_OK;
}
PP_EXPORT void PPP_ShutdownModule() {
}
PP_EXPORT const void* PPP_GetInterface(const char* interface_name) {
if (strcmp(interface_name, PPP_INSTANCE_INTERFACE) == 0)
return &instance_interface;
return NULL;
}
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