// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ANDROID_WEBVIEW_PUBLIC_BROWSER_DRAW_FN_H_
#define ANDROID_WEBVIEW_PUBLIC_BROWSER_DRAW_FN_H_
#include <vulkan/vulkan.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct ASurfaceControl ASurfaceControl;
typedef struct ASurfaceTransaction ASurfaceTransaction;
// In order to make small changes backwards compatible, all structs passed from
// android to chromium are versioned.
//
// 1 is Android Q. This matches kAwDrawGLInfoVersion version 3.
// 2 Adds transfer_function_* and color_space_toXYZD50 to AwDrawFn_DrawGLParams.
// 3 Adds SurfaceControl related functions.
// 4 Adds AwDrawFn_ReportRenderingThreads to AwDrawFnFunctionTable.
static const int kAwDrawFnVersion = 4;
// Returns parent ASurfaceControl for WebView overlays. It will be have same
// geometry as the surface we draw into and positioned below it (underlay).
// This does not pass ownership to webview, but guaranteed to be alive until
// transaction from next removeOverlays call or functor destruction will be
// finished.
typedef ASurfaceControl* AwDrawFn_GetSurfaceControl();
// Merges WebView transaction to be applied synchronously with current draw.
// This doesn't pass ownership of the transaction, changes will be copied and
// webview can free transaction right after the call.
typedef void AwDrawFn_MergeTransaction(ASurfaceTransaction* transaction);
enum AwDrawFnOverlaysMode {
// Indicated that webview should not promote anything to overlays this draw
// and remove all visible overlays.
// Added in version 3.
AW_DRAW_FN_OVERLAYS_MODE_DISABLED = 0,
// Indicates that webview can use overlays.
// Added in version 3.
AW_DRAW_FN_OVERLAYS_MODE_ENABLED = 1,
};
struct AwDrawFn_OnSyncParams {
int version;
bool apply_force_dark;
};
struct AwDrawFn_DrawGLParams {
int version;
// Input: current clip rect in surface coordinates. Reflects the current state
// of the OpenGL scissor rect. Both the OpenGL scissor rect and viewport are
// set by the caller of the draw function and updated during View animations.
int clip_left;
int clip_top;
int clip_right;
int clip_bottom;
// Input: current width/height of destination surface.
int width;
int height;
// Used to be is_layer.
bool deprecated_0;
// Input: current transformation matrix in surface pixels.
// Uses the column-based OpenGL matrix format.
float transform[16];
// Input: Color space parameters.
float transfer_function_g;
float transfer_function_a;
float transfer_function_b;
float transfer_function_c;
float transfer_function_d;
float transfer_function_e;
float transfer_function_f;
float color_space_toXYZD50[9];
// Input: Indicates how webview should use overlays for this draw.
// Added in version 3.
AwDrawFnOverlaysMode overlays_mode;
// Input: WebView can call it to obtain parent surface control for overlays.
// Added in version 3.
AwDrawFn_GetSurfaceControl* get_surface_control;
// Input: WebView call this to apply ASurfaceTransaction synchronously with
// the draw.
// Added in version 3.
AwDrawFn_MergeTransaction* merge_transaction;
};
struct AwDrawFn_InitVkParams {
int version;
VkInstance instance;
VkPhysicalDevice physical_device;
VkDevice device;
VkQueue queue;
uint32_t graphics_queue_index;
uint32_t api_version;
const char* const* enabled_instance_extension_names;
uint32_t enabled_instance_extension_names_length;
const char* const* enabled_device_extension_names;
uint32_t enabled_device_extension_names_length;
// Only one of device_features and device_features_2 should be non-null.
// If both are null then no features are enabled.
VkPhysicalDeviceFeatures* device_features;
VkPhysicalDeviceFeatures2* device_features_2;
};
struct AwDrawFn_DrawVkParams {
int version;
// Input: current width/height of destination surface.
int width;
int height;
bool deprecated_0;
// Input: current transform matrix
float transform[16];
// Input WebView should do its main compositing draws into this. It cannot do
// anything that would require stopping the render pass.
VkCommandBuffer secondary_command_buffer;
// Input: The main color attachment index where secondary_command_buffer will
// eventually be submitted.
uint32_t color_attachment_index;
// Input: A render pass which will be compatible to the one which the
// secondary_command_buffer will be submitted into.
VkRenderPass compatible_render_pass;
// Input: Format of the destination surface.
VkFormat format;
// Input: Color space parameters.
float transfer_function_g;
float transfer_function_a;
float transfer_function_b;
float transfer_function_c;
float transfer_function_d;
float transfer_function_e;
float transfer_function_f;
float color_space_toXYZD50[9];
// Input: current clip rect
int clip_left;
int clip_top;
int clip_right;
int clip_bottom;
// Input: Indicates how webview should use overlays for this draw.
// Added in version 3.
AwDrawFnOverlaysMode overlays_mode;
// Input: WebView can call it to obtain parent surface control for overlays.
// Added in version 3.
AwDrawFn_GetSurfaceControl* get_surface_control;
// Input: WebView call this to apply ASurfaceTransaction synchronously with
// the draw.
// Added in version 3.
AwDrawFn_MergeTransaction* merge_transaction;
};
struct AwDrawFn_PostDrawVkParams {
int version;
};
struct AwDrawFn_RemoveOverlaysParams {
int version;
// Input: WebView call this to apply ASurfaceTransaction synchronously with
// the draw.
// Added in version 3.
AwDrawFn_MergeTransaction* merge_transaction;
};
// Called on render thread while UI thread is blocked. Called for both GL and
// VK.
typedef void AwDrawFn_OnSync(int functor,
void* data,
AwDrawFn_OnSyncParams* params);
// Called on render thread when either the context is destroyed _or_ when the
// functor's last reference goes away. Will always be called with an active
// context. Called for both GL and VK.
typedef void AwDrawFn_OnContextDestroyed(int functor, void* data);
// Called on render thread when the last reference to the handle goes away and
// the handle is considered irrevocably destroyed. Will always be preceded by
// a call to OnContextDestroyed if this functor had ever been drawn. Called for
// both GL and VK.
typedef void AwDrawFn_OnDestroyed(int functor, void* data);
// Only called for GL.
typedef void AwDrawFn_DrawGL(int functor,
void* data,
AwDrawFn_DrawGLParams* params);
// Initialize vulkan state. Needs to be called again after any
// OnContextDestroyed. Only called for Vulkan.
typedef void AwDrawFn_InitVk(int functor,
void* data,
AwDrawFn_InitVkParams* params);
// Only called for Vulkan.
typedef void AwDrawFn_DrawVk(int functor,
void* data,
AwDrawFn_DrawVkParams* params);
// Only called for Vulkan.
typedef void AwDrawFn_PostDrawVk(int functor,
void* data,
AwDrawFn_PostDrawVkParams* params);
// Can be called to make webview hide all overlays and stop updating them until
// next draw. WebView must obtain new ASurfaceControl after this call to use as
// parent for the overlays on next draw.
typedef void AwDrawFn_RemoveOverlays(int functor,
void* data,
AwDrawFn_RemoveOverlaysParams* params);
struct AwDrawFnFunctorCallbacks {
// version is passed in CreateFunctor call.
AwDrawFn_OnSync* on_sync;
AwDrawFn_OnContextDestroyed* on_context_destroyed;
AwDrawFn_OnDestroyed* on_destroyed;
AwDrawFn_DrawGL* draw_gl;
AwDrawFn_InitVk* init_vk;
AwDrawFn_DrawVk* draw_vk;
AwDrawFn_PostDrawVk* post_draw_vk;
// Added in version 3.
AwDrawFn_RemoveOverlays* remove_overlays;
};
enum AwDrawFnRenderMode {
AW_DRAW_FN_RENDER_MODE_OPENGL_ES = 0,
AW_DRAW_FN_RENDER_MODE_VULKAN = 1,
};
// Get the render mode. Result is static for the process.
typedef AwDrawFnRenderMode AwDrawFn_QueryRenderMode(void);
// This available up to version 3, use the one below.
typedef int AwDrawFn_CreateFunctor(void* data,
AwDrawFnFunctorCallbacks* functor_callbacks);
// Create a functor. |functor_callbacks| should be valid until OnDestroyed.
typedef int AwDrawFn_CreateFunctor_v3(
void* data,
int version,
AwDrawFnFunctorCallbacks* functor_callbacks);
// May be called on any thread to signal that the functor should be destroyed.
// The functor will receive an onDestroyed when the last usage of it is
// released, and it should be considered alive & active until that point.
typedef void AwDrawFn_ReleaseFunctor(int functor);
// Report the list of threads critical for frame production for the given
// functor. Must be called on render thread.
typedef void AwDrawFn_ReportRenderingThreads(int functor,
const int32_t* thread_ids,
size_t size);
struct AwDrawFnFunctionTable {
int version;
AwDrawFn_QueryRenderMode* query_render_mode;
// Available up to version 3.
AwDrawFn_CreateFunctor* create_functor;
AwDrawFn_ReleaseFunctor* release_functor;
// Added in version 3.
AwDrawFn_CreateFunctor_v3* create_functor_v3;
// Added in version 4.
AwDrawFn_ReportRenderingThreads* report_rendering_threads;
};
#ifdef __cplusplus
} // extern "C"
#endif
#endif // ANDROID_WEBVIEW_PUBLIC_BROWSER_DRAW_FN_H_
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