275183ef15
Scaling tilemaps can cause border artifacts around the edges of tiles. This has been traced to precision issues in the GPU. This PR adds an adjustment to allow a minor contraction of the UVs of rects in order to compensate for the incorrect classification of texels across the UV border.
489 lines
18 KiB
C++
489 lines
18 KiB
C++
/*************************************************************************/
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/* rasterizer_canvas_gles2.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef RASTERIZERCANVASGLES2_H
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#define RASTERIZERCANVASGLES2_H
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#include "rasterizer_canvas_base_gles2.h"
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class RasterizerSceneGLES2;
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class RasterizerCanvasGLES2 : public RasterizerCanvasBaseGLES2 {
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// used to determine whether we use hardware transform (none)
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// software transform all verts, or software transform just a translate
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// (no rotate or scale)
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enum TransformMode {
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TM_NONE,
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TM_ALL,
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TM_TRANSLATE,
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};
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// pod versions of vector and color and RID, need to be 32 bit for vertex format
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struct BatchVector2 {
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float x, y;
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void set(const Vector2 &p_o) {
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x = p_o.x;
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y = p_o.y;
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}
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void to(Vector2 &r_o) const {
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r_o.x = x;
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r_o.y = y;
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}
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};
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struct BatchColor {
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float r, g, b, a;
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void set(const Color &p_c) {
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r = p_c.r;
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g = p_c.g;
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b = p_c.b;
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a = p_c.a;
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}
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bool operator==(const BatchColor &p_c) const {
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return (r == p_c.r) && (g == p_c.g) && (b == p_c.b) && (a == p_c.a);
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}
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bool operator!=(const BatchColor &p_c) const { return (*this == p_c) == false; }
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bool equals(const Color &p_c) const {
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return (r == p_c.r) && (g == p_c.g) && (b == p_c.b) && (a == p_c.a);
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}
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const float *get_data() const { return &r; }
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String to_string() const;
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};
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struct BatchVertex {
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// must be 32 bit pod
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BatchVector2 pos;
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BatchVector2 uv;
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};
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struct BatchVertexColored : public BatchVertex {
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// must be 32 bit pod
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BatchColor col;
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};
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struct Batch {
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enum CommandType : uint32_t {
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BT_DEFAULT,
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BT_RECT,
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};
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CommandType type;
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uint32_t first_command; // also item reference number
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uint32_t num_commands;
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uint32_t first_quad;
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uint32_t batch_texture_id;
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BatchColor color;
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};
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struct BatchTex {
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enum TileMode : uint32_t {
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TILE_OFF,
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TILE_NORMAL,
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TILE_FORCE_REPEAT,
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};
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RID RID_texture;
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RID RID_normal;
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TileMode tile_mode;
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BatchVector2 tex_pixel_size;
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uint32_t flags;
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};
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// items in a list to be sorted prior to joining
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struct BSortItem {
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// have a function to keep as pod, rather than operator
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void assign(const BSortItem &o) {
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item = o.item;
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z_index = o.z_index;
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}
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Item *item;
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int z_index;
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};
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// batch item may represent 1 or more items
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struct BItemJoined {
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uint32_t first_item_ref;
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uint32_t num_item_refs;
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Rect2 bounding_rect;
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// note the z_index may only be correct for the first of the joined item references
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// this has implications for light culling with z ranged lights.
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int16_t z_index;
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// these are defined in RasterizerStorageGLES2::Shader::CanvasItem::BatchFlags
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uint16_t flags;
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// we are always splitting items with lots of commands,
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// and items with unhandled primitives (default)
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bool use_hardware_transform() const { return num_item_refs == 1; }
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};
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struct BItemRef {
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Item *item;
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Color final_modulate;
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};
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struct BLightRegion {
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void reset() {
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light_bitfield = 0;
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shadow_bitfield = 0;
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too_many_lights = false;
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}
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uint64_t light_bitfield;
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uint64_t shadow_bitfield;
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bool too_many_lights; // we can only do light region optimization if there are 64 or less lights
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};
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struct BatchData {
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BatchData();
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void reset_flush() {
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batches.reset();
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batch_textures.reset();
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vertices.reset();
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total_quads = 0;
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total_color_changes = 0;
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}
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GLuint gl_vertex_buffer;
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GLuint gl_index_buffer;
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uint32_t max_quads;
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uint32_t vertex_buffer_size_units;
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uint32_t vertex_buffer_size_bytes;
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uint32_t index_buffer_size_units;
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uint32_t index_buffer_size_bytes;
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RasterizerArrayGLES2<BatchVertex> vertices;
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RasterizerArrayGLES2<BatchVertexColored> vertices_colored;
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RasterizerArrayGLES2<Batch> batches;
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RasterizerArrayGLES2<Batch> batches_temp; // used for translating to colored vertex batches
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RasterizerArray_non_pod_GLES2<BatchTex> batch_textures; // the only reason this is non-POD is because of RIDs
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bool use_colored_vertices;
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RasterizerArrayGLES2<BItemJoined> items_joined;
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RasterizerArrayGLES2<BItemRef> item_refs;
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// items are sorted prior to joining
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RasterizerArrayGLES2<BSortItem> sort_items;
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// counts
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int total_quads;
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// we keep a record of how many color changes caused new batches
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// if the colors are causing an excessive number of batches, we switch
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// to alternate batching method and add color to the vertex format.
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int total_color_changes;
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// if the shader is using MODULATE, we prevent baking color so the final_modulate can
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// be read in the shader.
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// if the shader is reading VERTEX, we prevent baking vertex positions with extra matrices etc
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// to prevent the read position being incorrect.
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// These flags are defined in RasterizerStorageGLES2::Shader::CanvasItem::BatchFlags
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uint32_t joined_item_batch_flags;
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// measured in pixels, recalculated each frame
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float scissor_threshold_area;
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// diagnose this frame, every nTh frame when settings_diagnose_frame is on
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bool diagnose_frame;
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String frame_string;
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uint32_t next_diagnose_tick;
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uint64_t diagnose_frame_number;
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// whether to join items across z_indices - this can interfere with z ranged lights,
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// so has to be disabled in some circumstances
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bool join_across_z_indices;
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// global settings
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bool settings_use_batching; // the current use_batching (affected by flash)
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bool settings_use_batching_original_choice; // the choice entered in project settings
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bool settings_flash_batching; // for regression testing, flash between non-batched and batched renderer
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bool settings_diagnose_frame; // print out batches to help optimize / regression test
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int settings_max_join_item_commands;
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float settings_colored_vertex_format_threshold;
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int settings_batch_buffer_num_verts;
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bool settings_scissor_lights;
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float settings_scissor_threshold; // 0.0 to 1.0
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int settings_item_reordering_lookahead;
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bool settings_use_single_rect_fallback;
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int settings_light_max_join_items;
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// uv contraction
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bool settings_uv_contract;
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float settings_uv_contract_amount;
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// only done on diagnose frame
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void reset_stats() {
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stats_items_sorted = 0;
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stats_light_items_joined = 0;
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}
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// frame stats (just for monitoring and debugging)
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int stats_items_sorted;
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int stats_light_items_joined;
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} bdata;
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struct RenderItemState {
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RenderItemState() { reset(); }
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void reset();
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Item *current_clip;
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RasterizerStorageGLES2::Shader *shader_cache;
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bool rebind_shader;
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bool prev_use_skeleton;
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int last_blend_mode;
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RID canvas_last_material;
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Color final_modulate;
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// used for joining items only
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BItemJoined *joined_item;
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bool join_batch_break;
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BLightRegion light_region;
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// 'item group' is data over a single call to canvas_render_items
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int item_group_z;
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Color item_group_modulate;
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Light *item_group_light;
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Transform2D item_group_base_transform;
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} _render_item_state;
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struct FillState {
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void reset() {
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// don't reset members that need to be preserved after flushing
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// half way through a list of commands
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curr_batch = 0;
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batch_tex_id = -1;
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texpixel_size = Vector2(1, 1);
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contract_uvs = false;
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}
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Batch *curr_batch;
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int batch_tex_id;
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bool use_hardware_transform;
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bool contract_uvs;
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Vector2 texpixel_size;
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Color final_modulate;
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TransformMode transform_mode;
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TransformMode orig_transform_mode;
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// support for extra matrices
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bool extra_matrix_sent; // whether sent on this item (in which case sofware transform can't be used untl end of item)
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int transform_extra_command_number_p1; // plus one to allow fast checking against zero
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Transform2D transform_combined; // final * extra
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};
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public:
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virtual void canvas_render_items_begin(const Color &p_modulate, Light *p_light, const Transform2D &p_base_transform);
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virtual void canvas_render_items_end();
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virtual void canvas_render_items(Item *p_item_list, int p_z, const Color &p_modulate, Light *p_light, const Transform2D &p_base_transform);
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virtual void canvas_begin();
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virtual void canvas_end();
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private:
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// legacy codepath .. to remove after testing
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void _canvas_render_item(Item *p_ci, RenderItemState &r_ris);
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_FORCE_INLINE_ void _canvas_item_render_commands(Item *p_item, Item *p_current_clip, bool &r_reclip, RasterizerStorageGLES2::Material *p_material);
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// high level batch funcs
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void canvas_render_items_implementation(Item *p_item_list, int p_z, const Color &p_modulate, Light *p_light, const Transform2D &p_base_transform);
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void render_joined_item(const BItemJoined &p_bij, RenderItemState &r_ris);
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void record_items(Item *p_item_list, int p_z);
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void join_items(Item *p_item_list, int p_z);
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void join_sorted_items();
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bool try_join_item(Item *p_ci, RenderItemState &r_ris, bool &r_batch_break);
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void render_joined_item_commands(const BItemJoined &p_bij, Item *p_current_clip, bool &r_reclip, RasterizerStorageGLES2::Material *p_material, bool p_lit);
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void render_batches(Item::Command *const *p_commands, Item *p_current_clip, bool &r_reclip, RasterizerStorageGLES2::Material *p_material);
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bool prefill_joined_item(FillState &r_fill_state, int &r_command_start, Item *p_item, Item *p_current_clip, bool &r_reclip, RasterizerStorageGLES2::Material *p_material);
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void flush_render_batches(Item *p_first_item, Item *p_current_clip, bool &r_reclip, RasterizerStorageGLES2::Material *p_material);
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// low level batch funcs
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void _batch_translate_to_colored();
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_FORCE_INLINE_ int _batch_find_or_create_tex(const RID &p_texture, const RID &p_normal, bool p_tile, int p_previous_match);
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RasterizerStorageGLES2::Texture *_get_canvas_texture(const RID &p_texture) const;
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void _batch_upload_buffers();
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void _batch_render_rects(const Batch &p_batch, RasterizerStorageGLES2::Material *p_material);
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BatchVertex *_batch_vertex_request_new() { return bdata.vertices.request(); }
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Batch *_batch_request_new(bool p_blank = true);
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bool _detect_batch_break(Item *p_ci);
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void _software_transform_vertex(BatchVector2 &r_v, const Transform2D &p_tr) const;
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void _software_transform_vertex(Vector2 &r_v, const Transform2D &p_tr) const;
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TransformMode _find_transform_mode(const Transform2D &p_tr) const;
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_FORCE_INLINE_ void _prefill_default_batch(FillState &r_fill_state, int p_command_num, const Item &p_item);
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// sorting
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void sort_items();
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bool sort_items_from(int p_start);
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bool _sort_items_match(const BSortItem &p_a, const BSortItem &p_b) const;
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// light scissoring
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bool _light_find_intersection(const Rect2 &p_item_rect, const Transform2D &p_light_xform, const Rect2 &p_light_rect, Rect2 &r_cliprect) const;
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bool _light_scissor_begin(const Rect2 &p_item_rect, const Transform2D &p_light_xform, const Rect2 &p_light_rect) const;
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void _calculate_scissor_threshold_area();
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// no need to compile these in in release, they are unneeded outside the editor and only add to executable size
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#ifdef DEBUG_ENABLED
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void diagnose_batches(Item::Command *const *p_commands);
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String get_command_type_string(const Item::Command &p_command) const;
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#endif
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public:
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void initialize();
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RasterizerCanvasGLES2();
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};
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//////////////////////////////////////////////////////////////
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// Default batches will not occur in software transform only items
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// EXCEPT IN THE CASE OF SINGLE RECTS (and this may well not occur, check the logic in prefill_join_item TYPE_RECT)
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// but can occur where transform commands have been sent during hardware batch
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_FORCE_INLINE_ void RasterizerCanvasGLES2::_prefill_default_batch(FillState &r_fill_state, int p_command_num, const Item &p_item) {
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if (r_fill_state.curr_batch->type == Batch::BT_DEFAULT) {
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// don't need to flush an extra transform command?
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if (!r_fill_state.transform_extra_command_number_p1) {
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// another default command, just add to the existing batch
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r_fill_state.curr_batch->num_commands++;
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} else {
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#ifdef DEBUG_ENABLED
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if (r_fill_state.transform_extra_command_number_p1 != p_command_num) {
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WARN_PRINT_ONCE("_prefill_default_batch : transform_extra_command_number_p1 != p_command_num");
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}
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#endif
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// we do have a pending extra transform command to flush
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// either the extra transform is in the prior command, or not, in which case we need 2 batches
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r_fill_state.curr_batch->num_commands += 2;
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r_fill_state.transform_extra_command_number_p1 = 0; // mark as sent
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r_fill_state.extra_matrix_sent = true;
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// the original mode should always be hardware transform ..
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// test this assumption
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//CRASH_COND(r_fill_state.orig_transform_mode != TM_NONE);
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r_fill_state.transform_mode = r_fill_state.orig_transform_mode;
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// do we need to restore anything else?
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}
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} else {
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// end of previous different type batch, so start new default batch
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// first consider whether there is a dirty extra matrix to send
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if (r_fill_state.transform_extra_command_number_p1) {
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// get which command the extra is in, and blank all the records as it no longer is stored CPU side
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int extra_command = r_fill_state.transform_extra_command_number_p1 - 1; // plus 1 based
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r_fill_state.transform_extra_command_number_p1 = 0;
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r_fill_state.extra_matrix_sent = true;
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// send the extra to the GPU in a batch
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r_fill_state.curr_batch = _batch_request_new();
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r_fill_state.curr_batch->type = Batch::BT_DEFAULT;
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r_fill_state.curr_batch->first_command = extra_command;
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r_fill_state.curr_batch->num_commands = 1;
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// revert to the original transform mode
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// e.g. go back to NONE if we were in hardware transform mode
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r_fill_state.transform_mode = r_fill_state.orig_transform_mode;
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// reset the original transform if we are going back to software mode,
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// because the extra is now done on the GPU...
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// (any subsequent extras are sent directly to the GPU, no deferring)
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if (r_fill_state.orig_transform_mode != TM_NONE) {
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r_fill_state.transform_combined = p_item.final_transform;
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}
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// can possibly combine batch with the next one in some cases
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// this is more efficient than having an extra batch especially for the extra
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if ((extra_command + 1) == p_command_num) {
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r_fill_state.curr_batch->num_commands = 2;
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return;
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}
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}
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// start default batch
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r_fill_state.curr_batch = _batch_request_new();
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r_fill_state.curr_batch->type = Batch::BT_DEFAULT;
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r_fill_state.curr_batch->first_command = p_command_num;
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r_fill_state.curr_batch->num_commands = 1;
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}
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}
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_FORCE_INLINE_ void RasterizerCanvasGLES2::_software_transform_vertex(BatchVector2 &r_v, const Transform2D &p_tr) const {
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Vector2 vc(r_v.x, r_v.y);
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vc = p_tr.xform(vc);
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r_v.set(vc);
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}
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_FORCE_INLINE_ void RasterizerCanvasGLES2::_software_transform_vertex(Vector2 &r_v, const Transform2D &p_tr) const {
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r_v = p_tr.xform(r_v);
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}
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_FORCE_INLINE_ RasterizerCanvasGLES2::TransformMode RasterizerCanvasGLES2::_find_transform_mode(const Transform2D &p_tr) const {
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// decided whether to do translate only for software transform
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if ((p_tr.elements[0].x == 1.0) &&
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(p_tr.elements[0].y == 0.0) &&
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(p_tr.elements[1].x == 0.0) &&
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(p_tr.elements[1].y == 1.0)) {
|
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return TM_TRANSLATE;
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}
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|
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return TM_ALL;
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}
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_FORCE_INLINE_ bool RasterizerCanvasGLES2::_sort_items_match(const BSortItem &p_a, const BSortItem &p_b) const {
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const Item *a = p_a.item;
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const Item *b = p_b.item;
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|
|
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if (b->commands.size() != 1)
|
|
return false;
|
|
|
|
// tested outside function
|
|
// if (a->commands.size() != 1)
|
|
// return false;
|
|
|
|
const Item::Command &cb = *b->commands[0];
|
|
if (cb.type != Item::Command::TYPE_RECT)
|
|
return false;
|
|
|
|
const Item::Command &ca = *a->commands[0];
|
|
// tested outside function
|
|
// if (ca.type != Item::Command::TYPE_RECT)
|
|
// return false;
|
|
|
|
const Item::CommandRect *rect_a = static_cast<const Item::CommandRect *>(&ca);
|
|
const Item::CommandRect *rect_b = static_cast<const Item::CommandRect *>(&cb);
|
|
|
|
if (rect_a->texture != rect_b->texture)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
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#endif // RASTERIZERCANVASGLES2_H
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