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virtualx-engine/drivers/gles3/rasterizer_canvas_gles3.h
Rémi Verschelde d95794ec8a
One Copyright Update to rule them all 
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.

It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).

We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).

Also fixed "cf." Frenchism - it's meant as "refer to / see".
2023-01-05 13:25:55 +01:00

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/**************************************************************************/
/* rasterizer_canvas_gles3.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#ifndef RASTERIZER_CANVAS_GLES3_H
#define RASTERIZER_CANVAS_GLES3_H
#ifdef GLES3_ENABLED
#include "rasterizer_scene_gles3.h"
#include "servers/rendering/renderer_canvas_render.h"
#include "servers/rendering/renderer_compositor.h"
#include "storage/material_storage.h"
#include "storage/texture_storage.h"
#include "shaders/canvas.glsl.gen.h"
#include "shaders/canvas_occlusion.glsl.gen.h"
class RasterizerSceneGLES3;
class RasterizerCanvasGLES3 : public RendererCanvasRender {
static RasterizerCanvasGLES3 *singleton;
_FORCE_INLINE_ void _update_transform_2d_to_mat2x4(const Transform2D &p_transform, float *p_mat2x4);
_FORCE_INLINE_ void _update_transform_2d_to_mat2x3(const Transform2D &p_transform, float *p_mat2x3);
_FORCE_INLINE_ void _update_transform_2d_to_mat4(const Transform2D &p_transform, float *p_mat4);
_FORCE_INLINE_ void _update_transform_to_mat4(const Transform3D &p_transform, float *p_mat4);
enum {
FLAGS_INSTANCING_MASK = 0x7F,
FLAGS_INSTANCING_HAS_COLORS = (1 << 7),
FLAGS_INSTANCING_HAS_CUSTOM_DATA = (1 << 8),
FLAGS_CLIP_RECT_UV = (1 << 9),
FLAGS_TRANSPOSE_RECT = (1 << 10),
FLAGS_NINEPACH_DRAW_CENTER = (1 << 12),
FLAGS_USING_PARTICLES = (1 << 13),
FLAGS_USE_SKELETON = (1 << 15),
FLAGS_NINEPATCH_H_MODE_SHIFT = 16,
FLAGS_NINEPATCH_V_MODE_SHIFT = 18,
FLAGS_LIGHT_COUNT_SHIFT = 20,
FLAGS_DEFAULT_NORMAL_MAP_USED = (1 << 26),
FLAGS_DEFAULT_SPECULAR_MAP_USED = (1 << 27),
FLAGS_USE_MSDF = (1 << 28),
FLAGS_USE_LCD = (1 << 29),
};
enum {
LIGHT_FLAGS_TEXTURE_MASK = 0xFFFF,
LIGHT_FLAGS_BLEND_SHIFT = 16,
LIGHT_FLAGS_BLEND_MASK = (3 << 16),
LIGHT_FLAGS_BLEND_MODE_ADD = (0 << 16),
LIGHT_FLAGS_BLEND_MODE_SUB = (1 << 16),
LIGHT_FLAGS_BLEND_MODE_MIX = (2 << 16),
LIGHT_FLAGS_BLEND_MODE_MASK = (3 << 16),
LIGHT_FLAGS_HAS_SHADOW = (1 << 20),
LIGHT_FLAGS_FILTER_SHIFT = 22
};
enum {
MAX_RENDER_ITEMS = 256 * 1024,
MAX_LIGHT_TEXTURES = 1024,
MAX_LIGHTS_PER_ITEM = 16,
DEFAULT_MAX_LIGHTS_PER_RENDER = 256,
};
/******************/
/**** LIGHTING ****/
/******************/
struct CanvasLight {
RID texture;
struct {
bool enabled = false;
float z_far;
float y_offset;
Transform2D directional_xform;
} shadow;
};
RID_Owner<CanvasLight> canvas_light_owner;
struct OccluderPolygon {
RS::CanvasOccluderPolygonCullMode cull_mode = RS::CANVAS_OCCLUDER_POLYGON_CULL_DISABLED;
int line_point_count = 0;
GLuint vertex_buffer = 0;
GLuint vertex_array = 0;
GLuint index_buffer = 0;
int sdf_point_count = 0;
int sdf_index_count = 0;
GLuint sdf_vertex_buffer = 0;
GLuint sdf_vertex_array = 0;
GLuint sdf_index_buffer = 0;
bool sdf_is_lines = false;
};
RID_Owner<OccluderPolygon> occluder_polygon_owner;
void _update_shadow_atlas();
struct {
CanvasOcclusionShaderGLES3 shader;
RID shader_version;
} shadow_render;
struct LightUniform {
float matrix[8]; //light to texture coordinate matrix
float shadow_matrix[8]; //light to shadow coordinate matrix
float color[4];
uint8_t shadow_color[4];
uint32_t flags; //index to light texture
float shadow_pixel_size;
float height;
float position[2];
float shadow_z_far_inv;
float shadow_y_ofs;
float atlas_rect[4];
};
public:
enum {
BASE_UNIFORM_LOCATION = 0,
GLOBAL_UNIFORM_LOCATION = 1,
LIGHT_UNIFORM_LOCATION = 2,
INSTANCE_UNIFORM_LOCATION = 3,
MATERIAL_UNIFORM_LOCATION = 4,
};
struct StateBuffer {
float canvas_transform[16];
float screen_transform[16];
float canvas_normal_transform[16];
float canvas_modulate[4];
float screen_pixel_size[2];
float time;
uint32_t use_pixel_snap;
float sdf_to_tex[4];
float sdf_to_screen[2];
float screen_to_sdf[2];
uint32_t directional_light_count;
float tex_to_sdf;
uint32_t pad1;
uint32_t pad2;
};
struct PolygonBuffers {
GLuint vertex_buffer = 0;
GLuint vertex_array = 0;
GLuint index_buffer = 0;
int count = 0;
bool color_disabled = false;
Color color;
};
struct {
HashMap<PolygonID, PolygonBuffers> polygons;
PolygonID last_id = 0;
} polygon_buffers;
RendererCanvasRender::PolygonID request_polygon(const Vector<int> &p_indices, const Vector<Point2> &p_points, const Vector<Color> &p_colors, const Vector<Point2> &p_uvs = Vector<Point2>(), const Vector<int> &p_bones = Vector<int>(), const Vector<float> &p_weights = Vector<float>()) override;
void free_polygon(PolygonID p_polygon) override;
struct InstanceData {
float world[6];
float color_texture_pixel_size[2];
union {
//rect
struct {
float modulation[4];
union {
float msdf[4];
float ninepatch_margins[4];
};
float dst_rect[4];
float src_rect[4];
float pad[2];
};
//primitive
struct {
float points[6]; // vec2 points[3]
float uvs[6]; // vec2 points[3]
uint32_t colors[6]; // colors encoded as half
};
};
uint32_t flags;
uint32_t specular_shininess;
uint32_t lights[4];
};
struct Data {
GLuint canvas_quad_vertices;
GLuint canvas_quad_array;
GLuint indexed_quad_buffer;
GLuint indexed_quad_array;
GLuint particle_quad_vertices;
GLuint particle_quad_array;
GLuint ninepatch_vertices;
GLuint ninepatch_elements;
RID canvas_shader_default_version;
uint32_t max_lights_per_render = 256;
uint32_t max_lights_per_item = 16;
uint32_t max_instances_per_batch = 512;
uint32_t max_instances_per_buffer = 16384;
uint32_t max_instance_buffer_size = 16384 * 128;
} data;
struct Batch {
// Position in the UBO measured in bytes
uint32_t start = 0;
uint32_t instance_count = 0;
RID tex;
RS::CanvasItemTextureFilter filter = RS::CANVAS_ITEM_TEXTURE_FILTER_MAX;
RS::CanvasItemTextureRepeat repeat = RS::CANVAS_ITEM_TEXTURE_REPEAT_MAX;
GLES3::CanvasShaderData::BlendMode blend_mode = GLES3::CanvasShaderData::BLEND_MODE_MIX;
Color blend_color = Color(1.0, 1.0, 1.0, 1.0);
Item *clip = nullptr;
RID material;
GLES3::CanvasMaterialData *material_data = nullptr;
CanvasShaderGLES3::ShaderVariant shader_variant = CanvasShaderGLES3::MODE_QUAD;
const Item::Command *command = nullptr;
Item::Command::Type command_type = Item::Command::TYPE_ANIMATION_SLICE; // Can default to any type that doesn't form a batch.
uint32_t primitive_points = 0;
bool lights_disabled = false;
};
// DataBuffer contains our per-frame data. I.e. the resources that are updated each frame.
// We track them and ensure that they don't get reused until at least 2 frames have passed
// to avoid the GPU stalling to wait for a resource to become available.
struct DataBuffer {
GLuint buffer = 0;
GLuint light_ubo = 0;
GLuint state_ubo = 0;
uint64_t last_frame_used = -3;
GLsync fence = GLsync();
};
struct State {
LocalVector<DataBuffer> canvas_instance_data_buffers;
LocalVector<Batch> canvas_instance_batches;
uint32_t current_buffer = 0;
uint32_t current_buffer_index = 0;
uint32_t current_batch_index = 0;
InstanceData *instance_data_array = nullptr;
LightUniform *light_uniforms = nullptr;
GLuint shadow_texture = 0;
GLuint shadow_depth_buffer = 0;
GLuint shadow_fb = 0;
int shadow_texture_size = 2048;
bool using_directional_lights = false;
RID current_tex;
RS::CanvasItemTextureFilter current_filter_mode = RS::CANVAS_ITEM_TEXTURE_FILTER_MAX;
RS::CanvasItemTextureRepeat current_repeat_mode = RS::CANVAS_ITEM_TEXTURE_REPEAT_MAX;
bool transparent_render_target = false;
double time = 0.0;
RS::CanvasItemTextureFilter default_filter = RS::CANVAS_ITEM_TEXTURE_FILTER_DEFAULT;
RS::CanvasItemTextureRepeat default_repeat = RS::CANVAS_ITEM_TEXTURE_REPEAT_DEFAULT;
} state;
Item *items[MAX_RENDER_ITEMS];
RID default_canvas_texture;
RID default_canvas_group_material;
RID default_canvas_group_shader;
RID default_clip_children_material;
RID default_clip_children_shader;
typedef void Texture;
void canvas_begin(RID p_to_render_target, bool p_to_backbuffer);
//virtual void draw_window_margins(int *black_margin, RID *black_image) override;
void draw_lens_distortion_rect(const Rect2 &p_rect, float p_k1, float p_k2, const Vector2 &p_eye_center, float p_oversample);
void reset_canvas();
RID light_create() override;
void light_set_texture(RID p_rid, RID p_texture) override;
void light_set_use_shadow(RID p_rid, bool p_enable) override;
void light_update_shadow(RID p_rid, int p_shadow_index, const Transform2D &p_light_xform, int p_light_mask, float p_near, float p_far, LightOccluderInstance *p_occluders) override;
void light_update_directional_shadow(RID p_rid, int p_shadow_index, const Transform2D &p_light_xform, int p_light_mask, float p_cull_distance, const Rect2 &p_clip_rect, LightOccluderInstance *p_occluders) override;
void render_sdf(RID p_render_target, LightOccluderInstance *p_occluders) override;
RID occluder_polygon_create() override;
void occluder_polygon_set_shape(RID p_occluder, const Vector<Vector2> &p_points, bool p_closed) override;
void occluder_polygon_set_cull_mode(RID p_occluder, RS::CanvasOccluderPolygonCullMode p_mode) override;
void set_shadow_texture_size(int p_size) override;
bool free(RID p_rid) override;
void update() override;
void _bind_canvas_texture(RID p_texture, RS::CanvasItemTextureFilter p_base_filter, RS::CanvasItemTextureRepeat p_base_repeat);
void _prepare_canvas_texture(RID p_texture, RS::CanvasItemTextureFilter p_base_filter, RS::CanvasItemTextureRepeat p_base_repeat, uint32_t &r_index, Size2 &r_texpixel_size);
void canvas_render_items(RID p_to_render_target, Item *p_item_list, const Color &p_modulate, Light *p_light_list, Light *p_directional_list, const Transform2D &p_canvas_transform, RS::CanvasItemTextureFilter p_default_filter, RS::CanvasItemTextureRepeat p_default_repeat, bool p_snap_2d_vertices_to_pixel, bool &r_sdf_used) override;
void _render_items(RID p_to_render_target, int p_item_count, const Transform2D &p_canvas_transform_inverse, Light *p_lights, uint32_t &r_last_index, bool &r_sdf_used, bool p_to_backbuffer = false);
void _record_item_commands(const Item *p_item, RID p_render_target, const Transform2D &p_canvas_transform_inverse, Item *&current_clip, GLES3::CanvasShaderData::BlendMode p_blend_mode, Light *p_lights, uint32_t &r_index, bool &r_break_batch, bool &r_sdf_used);
void _render_batch(Light *p_lights, uint32_t p_index);
bool _bind_material(GLES3::CanvasMaterialData *p_material_data, CanvasShaderGLES3::ShaderVariant p_variant, uint64_t p_specialization);
void _new_batch(bool &r_batch_broken, uint32_t &r_index);
void _add_to_batch(uint32_t &r_index, bool &r_batch_broken);
void _allocate_instance_data_buffer();
void _align_instance_data_buffer(uint32_t &r_index);
void _enable_attributes(uint32_t p_start, bool p_primitive, uint32_t p_rate = 1);
void set_time(double p_time);
static RasterizerCanvasGLES3 *get_singleton();
RasterizerCanvasGLES3();
~RasterizerCanvasGLES3();
};
#endif // GLES3_ENABLED
#endif // RASTERIZER_CANVAS_GLES3_H
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