godotengine
/
godot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
godot/drivers/gles2/rasterizer_canvas_gles2.h

930 lines
32 KiB
C++
Raw Blame History

/*************************************************************************/
/* rasterizer_canvas_gles2.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* 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 RASTERIZERCANVASGLES2_H
#define RASTERIZERCANVASGLES2_H
#include "rasterizer_canvas_base_gles2.h"
class RasterizerSceneGLES2;
class RasterizerCanvasGLES2 : public RasterizerCanvasBaseGLES2 {
// used to determine whether we use hardware transform (none)
// software transform all verts, or software transform just a translate
// (no rotate or scale)
enum TransformMode {
TM_NONE,
TM_ALL,
TM_TRANSLATE,
};
// pod versions of vector and color and RID, need to be 32 bit for vertex format
struct BatchVector2 {
float x, y;
void set(const Vector2 &p_o) {
x = p_o.x;
y = p_o.y;
}
void to(Vector2 &r_o) const {
r_o.x = x;
r_o.y = y;
}
};
struct BatchColor {
float r, g, b, a;
void set(const Color &p_c) {
r = p_c.r;
g = p_c.g;
b = p_c.b;
a = p_c.a;
}
bool operator==(const BatchColor &p_c) const {
return (r == p_c.r) && (g == p_c.g) && (b == p_c.b) && (a == p_c.a);
}
bool operator!=(const BatchColor &p_c) const { return (*this == p_c) == false; }
bool equals(const Color &p_c) const {
return (r == p_c.r) && (g == p_c.g) && (b == p_c.b) && (a == p_c.a);
}
const float *get_data() const { return &r; }
String to_string() const;
};
struct BatchVertex {
// must be 32 bit pod
BatchVector2 pos;
BatchVector2 uv;
};
struct BatchVertexColored : public BatchVertex {
// must be 32 bit pod
BatchColor col;
};
struct BatchVertexLightAngled : public BatchVertexColored {
// must be pod
float light_angle;
};
struct Batch {
enum CommandType : uint32_t {
BT_DEFAULT,
BT_RECT,
};
CommandType type;
uint32_t first_command; // also item reference number
uint32_t num_commands;
uint32_t first_quad;
uint32_t batch_texture_id;
BatchColor color;
};
struct BatchTex {
enum TileMode : uint32_t {
TILE_OFF,
TILE_NORMAL,
TILE_FORCE_REPEAT,
};
RID RID_texture;
RID RID_normal;
TileMode tile_mode;
BatchVector2 tex_pixel_size;
uint32_t flags;
};
// items in a list to be sorted prior to joining
struct BSortItem {
// have a function to keep as pod, rather than operator
void assign(const BSortItem &o) {
item = o.item;
z_index = o.z_index;
}
Item *item;
int z_index;
};
// batch item may represent 1 or more items
struct BItemJoined {
uint32_t first_item_ref;
uint32_t num_item_refs;
Rect2 bounding_rect;
// note the z_index may only be correct for the first of the joined item references
// this has implications for light culling with z ranged lights.
int16_t z_index;
// these are defined in RasterizerStorageGLES2::Shader::CanvasItem::BatchFlags
uint16_t flags;
// we are always splitting items with lots of commands,
// and items with unhandled primitives (default)
bool use_hardware_transform() const { return num_item_refs == 1; }
};
struct BItemRef {
Item *item;
Color final_modulate;
};
struct BLightRegion {
void reset() {
light_bitfield = 0;
shadow_bitfield = 0;
too_many_lights = false;
}
uint64_t light_bitfield;
uint64_t shadow_bitfield;
bool too_many_lights; // we can only do light region optimization if there are 64 or less lights
};
struct BatchData {
BatchData();
void reset_flush() {
batches.reset();
batch_textures.reset();
vertices.reset();
light_angles.reset();
total_quads = 0;
total_color_changes = 0;
use_light_angles = false;
}
GLuint gl_vertex_buffer;
GLuint gl_index_buffer;
uint32_t max_quads;
uint32_t vertex_buffer_size_units;
uint32_t vertex_buffer_size_bytes;
uint32_t index_buffer_size_units;
uint32_t index_buffer_size_bytes;
// small vertex FVF type - pos and UV.
// This will always be written to initially, but can be translated
// to larger FVFs if necessary.
RasterizerArrayGLES2<BatchVertex> vertices;
// extra data which can be stored during prefilling, for later translation to larger FVFs
RasterizerArrayGLES2<float> light_angles;
// instead of having a different buffer for each vertex FVF type
// we have a special array big enough for the biggest FVF
// which can have a changeable unit size, and reuse it.
RasterizerUnitArrayGLES2 unit_vertices;
RasterizerArrayGLES2<Batch> batches;
RasterizerArrayGLES2<Batch> batches_temp; // used for translating to colored vertex batches
RasterizerArray_non_pod_GLES2<BatchTex> batch_textures; // the only reason this is non-POD is because of RIDs
// flexible vertex format.
// all verts have pos and UV.
// some have color, some light angles etc.
bool use_colored_vertices;
bool use_light_angles;
RasterizerArrayGLES2<BItemJoined> items_joined;
RasterizerArrayGLES2<BItemRef> item_refs;
// items are sorted prior to joining
RasterizerArrayGLES2<BSortItem> sort_items;
// counts
int total_quads;
// we keep a record of how many color changes caused new batches
// if the colors are causing an excessive number of batches, we switch
// to alternate batching method and add color to the vertex format.
int total_color_changes;
// if the shader is using MODULATE, we prevent baking color so the final_modulate can
// be read in the shader.
// if the shader is reading VERTEX, we prevent baking vertex positions with extra matrices etc
// to prevent the read position being incorrect.
// These flags are defined in RasterizerStorageGLES2::Shader::CanvasItem::BatchFlags
uint32_t joined_item_batch_flags;
// measured in pixels, recalculated each frame
float scissor_threshold_area;
// diagnose this frame, every nTh frame when settings_diagnose_frame is on
bool diagnose_frame;
String frame_string;
uint32_t next_diagnose_tick;
uint64_t diagnose_frame_number;
// whether to join items across z_indices - this can interfere with z ranged lights,
// so has to be disabled in some circumstances
bool join_across_z_indices;
// global settings
bool settings_use_batching; // the current use_batching (affected by flash)
bool settings_use_batching_original_choice; // the choice entered in project settings
bool settings_flash_batching; // for regression testing, flash between non-batched and batched renderer
bool settings_diagnose_frame; // print out batches to help optimize / regression test
int settings_max_join_item_commands;
float settings_colored_vertex_format_threshold;
int settings_batch_buffer_num_verts;
bool settings_scissor_lights;
float settings_scissor_threshold; // 0.0 to 1.0
int settings_item_reordering_lookahead;
bool settings_use_single_rect_fallback;
int settings_light_max_join_items;
// uv contraction
bool settings_uv_contract;
float settings_uv_contract_amount;
// only done on diagnose frame
void reset_stats() {
stats_items_sorted = 0;
stats_light_items_joined = 0;
}
// frame stats (just for monitoring and debugging)
int stats_items_sorted;
int stats_light_items_joined;
} bdata;
struct RenderItemState {
RenderItemState() { reset(); }
void reset();
Item *current_clip;
RasterizerStorageGLES2::Shader *shader_cache;
bool rebind_shader;
bool prev_use_skeleton;
int last_blend_mode;
RID canvas_last_material;
Color final_modulate;
// used for joining items only
BItemJoined *joined_item;
bool join_batch_break;
BLightRegion light_region;
// 'item group' is data over a single call to canvas_render_items
int item_group_z;
Color item_group_modulate;
Light *item_group_light;
Transform2D item_group_base_transform;
} _render_item_state;
struct FillState {
void reset() {
// don't reset members that need to be preserved after flushing
// half way through a list of commands
curr_batch = 0;
batch_tex_id = -1;
texpixel_size = Vector2(1, 1);
contract_uvs = false;
}
Batch *curr_batch;
int batch_tex_id;
bool use_hardware_transform;
bool contract_uvs;
Vector2 texpixel_size;
Color final_modulate;
TransformMode transform_mode;
TransformMode orig_transform_mode;
// support for extra matrices
bool extra_matrix_sent; // whether sent on this item (in which case software transform can't be used untl end of item)
int transform_extra_command_number_p1; // plus one to allow fast checking against zero
Transform2D transform_combined; // final * extra
};
public:
virtual void canvas_render_items_begin(const Color &p_modulate, Light *p_light, const Transform2D &p_base_transform);
virtual void canvas_render_items_end();
virtual void canvas_render_items(Item *p_item_list, int p_z, const Color &p_modulate, Light *p_light, const Transform2D &p_base_transform);
virtual void canvas_begin();
virtual void canvas_end();
private:
// legacy codepath .. to remove after testing
void _canvas_render_item(Item *p_ci, RenderItemState &r_ris);
void _canvas_item_render_commands(Item *p_item, Item *p_current_clip, bool &r_reclip, RasterizerStorageGLES2::Material *p_material);
// high level batch funcs
void canvas_render_items_implementation(Item *p_item_list, int p_z, const Color &p_modulate, Light *p_light, const Transform2D &p_base_transform);
void render_joined_item(const BItemJoined &p_bij, RenderItemState &r_ris);
void record_items(Item *p_item_list, int p_z);
void join_items(Item *p_item_list, int p_z);
void join_sorted_items();
bool try_join_item(Item *p_ci, RenderItemState &r_ris, bool &r_batch_break);
void render_joined_item_commands(const BItemJoined &p_bij, Item *p_current_clip, bool &r_reclip, RasterizerStorageGLES2::Material *p_material, bool p_lit);
void render_batches(Item::Command *const *p_commands, Item *p_current_clip, bool &r_reclip, RasterizerStorageGLES2::Material *p_material);
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);
void flush_render_batches(Item *p_first_item, Item *p_current_clip, bool &r_reclip, RasterizerStorageGLES2::Material *p_material);
// low level batch funcs
int _batch_find_or_create_tex(const RID &p_texture, const RID &p_normal, bool p_tile, int p_previous_match);
RasterizerStorageGLES2::Texture *_get_canvas_texture(const RID &p_texture) const;
void _batch_upload_buffers();
void _batch_render_rects(const Batch &p_batch, RasterizerStorageGLES2::Material *p_material);
BatchVertex *_batch_vertex_request_new() { return bdata.vertices.request(); }
Batch *_batch_request_new(bool p_blank = true);
bool _detect_batch_break(Item *p_ci);
void _software_transform_vertex(BatchVector2 &r_v, const Transform2D &p_tr) const;
void _software_transform_vertex(Vector2 &r_v, const Transform2D &p_tr) const;
TransformMode _find_transform_mode(const Transform2D &p_tr) const;
void _prefill_default_batch(FillState &r_fill_state, int p_command_num, const Item &p_item);
// sorting
void sort_items();
bool sort_items_from(int p_start);
bool _sort_items_match(const BSortItem &p_a, const BSortItem &p_b) const;
// light scissoring
bool _light_find_intersection(const Rect2 &p_item_rect, const Transform2D &p_light_xform, const Rect2 &p_light_rect, Rect2 &r_cliprect) const;
bool _light_scissor_begin(const Rect2 &p_item_rect, const Transform2D &p_light_xform, const Rect2 &p_light_rect) const;
void _calculate_scissor_threshold_area();
// no need to compile these in in release, they are unneeded outside the editor and only add to executable size
#ifdef DEBUG_ENABLED
void diagnose_batches(Item::Command *const *p_commands);
String get_command_type_string(const Item::Command &p_command) const;
#endif
public:
void initialize();
RasterizerCanvasGLES2();
private:
template <bool SEND_LIGHT_ANGLES>
bool prefill_rect(Item::CommandRect *rect, FillState &r_fill_state, int &r_command_start, int command_num, int command_count, Item::Command *const *commands, Item *p_item, bool multiply_final_modulate);
template <class BATCH_VERTEX_TYPE, bool INCLUDE_LIGHT_ANGLES>
void _translate_batches_to_larger_FVF();
};
//////////////////////////////////////////////////////////////
// Default batches will not occur in software transform only items
// EXCEPT IN THE CASE OF SINGLE RECTS (and this may well not occur, check the logic in prefill_join_item TYPE_RECT)
// but can occur where transform commands have been sent during hardware batch
inline void RasterizerCanvasGLES2::_prefill_default_batch(FillState &r_fill_state, int p_command_num, const Item &p_item) {
if (r_fill_state.curr_batch->type == Batch::BT_DEFAULT) {
// don't need to flush an extra transform command?
if (!r_fill_state.transform_extra_command_number_p1) {
// another default command, just add to the existing batch
r_fill_state.curr_batch->num_commands++;
} else {
#if defined(TOOLS_ENABLED) && defined(DEBUG_ENABLED)
if (r_fill_state.transform_extra_command_number_p1 != p_command_num) {
WARN_PRINT_ONCE("_prefill_default_batch : transform_extra_command_number_p1 != p_command_num");
}
#endif
// if the first member of the batch is a transform we have to be careful
if (!r_fill_state.curr_batch->num_commands) {
// there can be leading useless extra transforms (sometimes happens with debug collision polys)
// we need to rejig the first_command for the first useful transform
r_fill_state.curr_batch->first_command += r_fill_state.transform_extra_command_number_p1 - 1;
}
// we do have a pending extra transform command to flush
// either the extra transform is in the prior command, or not, in which case we need 2 batches
r_fill_state.curr_batch->num_commands += 2;
r_fill_state.transform_extra_command_number_p1 = 0; // mark as sent
r_fill_state.extra_matrix_sent = true;
// the original mode should always be hardware transform ..
// test this assumption
//CRASH_COND(r_fill_state.orig_transform_mode != TM_NONE);
r_fill_state.transform_mode = r_fill_state.orig_transform_mode;
// do we need to restore anything else?
}
} else {
// end of previous different type batch, so start new default batch
// first consider whether there is a dirty extra matrix to send
if (r_fill_state.transform_extra_command_number_p1) {
// get which command the extra is in, and blank all the records as it no longer is stored CPU side
int extra_command = r_fill_state.transform_extra_command_number_p1 - 1; // plus 1 based
r_fill_state.transform_extra_command_number_p1 = 0;
r_fill_state.extra_matrix_sent = true;
// send the extra to the GPU in a batch
r_fill_state.curr_batch = _batch_request_new();
r_fill_state.curr_batch->type = Batch::BT_DEFAULT;
r_fill_state.curr_batch->first_command = extra_command;
r_fill_state.curr_batch->num_commands = 1;
// revert to the original transform mode
// e.g. go back to NONE if we were in hardware transform mode
r_fill_state.transform_mode = r_fill_state.orig_transform_mode;
// reset the original transform if we are going back to software mode,
// because the extra is now done on the GPU...
// (any subsequent extras are sent directly to the GPU, no deferring)
if (r_fill_state.orig_transform_mode != TM_NONE) {
r_fill_state.transform_combined = p_item.final_transform;
}
// can possibly combine batch with the next one in some cases
// this is more efficient than having an extra batch especially for the extra
if ((extra_command + 1) == p_command_num) {
r_fill_state.curr_batch->num_commands = 2;
return;
}
}
// start default batch
r_fill_state.curr_batch = _batch_request_new();
r_fill_state.curr_batch->type = Batch::BT_DEFAULT;
r_fill_state.curr_batch->first_command = p_command_num;
r_fill_state.curr_batch->num_commands = 1;
}
}
inline void RasterizerCanvasGLES2::_software_transform_vertex(BatchVector2 &r_v, const Transform2D &p_tr) const {
Vector2 vc(r_v.x, r_v.y);
vc = p_tr.xform(vc);
r_v.set(vc);
}
inline void RasterizerCanvasGLES2::_software_transform_vertex(Vector2 &r_v, const Transform2D &p_tr) const {
r_v = p_tr.xform(r_v);
}
inline RasterizerCanvasGLES2::TransformMode RasterizerCanvasGLES2::_find_transform_mode(const Transform2D &p_tr) const {
// decided whether to do translate only for software transform
if ((p_tr.elements[0].x == 1.0) &&
(p_tr.elements[0].y == 0.0) &&
(p_tr.elements[1].x == 0.0) &&
(p_tr.elements[1].y == 1.0)) {
return TM_TRANSLATE;
}
return TM_ALL;
}
inline bool RasterizerCanvasGLES2::_sort_items_match(const BSortItem &p_a, const BSortItem &p_b) const {
const Item *a = p_a.item;
const Item *b = p_b.item;
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;
}
//////////////////////////////////////////////////////////////
// TEMPLATE FUNCS
// Translation always involved adding color to the FVF, which enables
// joining of batches that have different colors.
// There is a trade off. Non colored verts are smaller so work faster, but
// there comes a point where it is better to just use colored verts to avoid lots of
// batches.
// In addition this can optionally add light angles to the FVF, necessary for normal mapping.
template <class BATCH_VERTEX_TYPE, bool INCLUDE_LIGHT_ANGLES>
void RasterizerCanvasGLES2::_translate_batches_to_larger_FVF() {
// zeros the size and sets up how big each unit is
bdata.unit_vertices.prepare(sizeof(BATCH_VERTEX_TYPE));
bdata.batches_temp.reset();
// As the vertices_colored and batches_temp are 'mirrors' of the non-colored version,
// the sizes should be equal, and allocations should never fail. Hence the use of debug
// asserts to check program flow, these should not occur at runtime unless the allocation
// code has been altered.
#if defined(TOOLS_ENABLED) && defined(DEBUG_ENABLED)
CRASH_COND(bdata.unit_vertices.max_size() != bdata.vertices.max_size());
CRASH_COND(bdata.batches_temp.max_size() != bdata.batches.max_size());
#endif
Color curr_col(-1.0, -1.0, -1.0, -1.0);
Batch *dest_batch = 0;
const float *source_light_angles = &bdata.light_angles[0];
// translate the batches into vertex colored batches
for (int n = 0; n < bdata.batches.size(); n++) {
const Batch &source_batch = bdata.batches[n];
// does source batch use light angles?
const BatchTex &btex = bdata.batch_textures[source_batch.batch_texture_id];
bool source_batch_uses_light_angles = btex.RID_normal != RID();
bool needs_new_batch = true;
if (dest_batch) {
if (dest_batch->type == source_batch.type) {
if (source_batch.type == Batch::BT_RECT) {
if (dest_batch->batch_texture_id == source_batch.batch_texture_id) {
// add to previous batch
dest_batch->num_commands += source_batch.num_commands;
needs_new_batch = false;
// create the colored verts (only if not default)
int first_vert = source_batch.first_quad * 4;
int end_vert = 4 * (source_batch.first_quad + source_batch.num_commands);
for (int v = first_vert; v < end_vert; v++) {
const BatchVertex &bv = bdata.vertices[v];
BATCH_VERTEX_TYPE *cv = (BatchVertexLightAngled *)bdata.unit_vertices.request();
#if defined(TOOLS_ENABLED) && defined(DEBUG_ENABLED)
CRASH_COND(!cv);
#endif
cv->pos = bv.pos;
cv->uv = bv.uv;
cv->col = source_batch.color;
if (INCLUDE_LIGHT_ANGLES) {
// this is required to allow compilation with non light angle vertex.
// it should be compiled out.
BatchVertexLightAngled *lv = (BatchVertexLightAngled *)cv;
if (source_batch_uses_light_angles)
lv->light_angle = *source_light_angles++;
else
lv->light_angle = 0.0f; // dummy, unused in vertex shader (could possibly be left uninitialized, but probably bad idea)
}
}
} // textures match
} else {
// default
// we can still join, but only under special circumstances
// does this ever happen? not sure at this stage, but left for future expansion
uint32_t source_last_command = source_batch.first_command + source_batch.num_commands;
if (source_last_command == dest_batch->first_command) {
dest_batch->num_commands += source_batch.num_commands;
needs_new_batch = false;
} // if the commands line up exactly
}
} // if both batches are the same type
} // if dest batch is valid
if (needs_new_batch) {
dest_batch = bdata.batches_temp.request();
#if defined(TOOLS_ENABLED) && defined(DEBUG_ENABLED)
CRASH_COND(!dest_batch);
#endif
*dest_batch = source_batch;
// create the colored verts (only if not default)
if (source_batch.type != Batch::BT_DEFAULT) {
int first_vert = source_batch.first_quad * 4;
int end_vert = 4 * (source_batch.first_quad + source_batch.num_commands);
for (int v = first_vert; v < end_vert; v++) {
const BatchVertex &bv = bdata.vertices[v];
BATCH_VERTEX_TYPE *cv = (BatchVertexLightAngled *)bdata.unit_vertices.request();
#if defined(TOOLS_ENABLED) && defined(DEBUG_ENABLED)
CRASH_COND(!cv);
#endif
cv->pos = bv.pos;
cv->uv = bv.uv;
cv->col = source_batch.color;
if (INCLUDE_LIGHT_ANGLES) {
// this is required to allow compilation with non light angle vertex.
// it should be compiled out.
BatchVertexLightAngled *lv = (BatchVertexLightAngled *)cv;
if (source_batch_uses_light_angles)
lv->light_angle = *source_light_angles++;
else
lv->light_angle = 0.0f; // dummy, unused in vertex shader (could possibly be left uninitialized, but probably bad idea)
} // if using light angles
}
}
}
}
// copy the temporary batches to the master batch list (this could be avoided but it makes the code cleaner)
bdata.batches.copy_from(bdata.batches_temp);
}
// return true if buffer full up, else return false
template <bool SEND_LIGHT_ANGLES>
bool RasterizerCanvasGLES2::prefill_rect(Item::CommandRect *rect, FillState &r_fill_state, int &r_command_start, int command_num, int command_count, Item::Command *const *commands, Item *p_item, bool multiply_final_modulate) {
bool change_batch = false;
// conditions for creating a new batch
if (r_fill_state.curr_batch->type != Batch::BT_RECT) {
change_batch = true;
// check for special case if there is only a single or small number of rects,
// in which case we will use the legacy default rect renderer
// because it is faster for single rects
// we only want to do this if not a joined item with more than 1 item,
// because joined items with more than 1, the command * will be incorrect
// NOTE - this is assuming that use_hardware_transform means that it is a non-joined item!!
// If that assumption is incorrect this will go horribly wrong.
if (bdata.settings_use_single_rect_fallback && r_fill_state.use_hardware_transform) {
bool is_single_rect = false;
int command_num_next = command_num + 1;
if (command_num_next < command_count) {
Item::Command *command_next = commands[command_num_next];
if ((command_next->type != Item::Command::TYPE_RECT) && (command_next->type != Item::Command::TYPE_TRANSFORM)) {
is_single_rect = true;
}
} else {
is_single_rect = true;
}
// if it is a rect on its own, do exactly the same as the default routine
if (is_single_rect) {
_prefill_default_batch(r_fill_state, command_num, *p_item);
return false;
}
} // if use hardware transform
}
Color col = rect->modulate;
if (multiply_final_modulate) {
col *= r_fill_state.final_modulate;
}
// instead of doing all the texture preparation for EVERY rect,
// we build a list of texture combinations and do this once off.
// This means we have a potentially rather slow step to identify which texture combo
// using the RIDs.
int old_batch_tex_id = r_fill_state.batch_tex_id;
r_fill_state.batch_tex_id = _batch_find_or_create_tex(rect->texture, rect->normal_map, rect->flags & CANVAS_RECT_TILE, old_batch_tex_id);
//r_fill_state.use_light_angles = send_light_angles;
if (SEND_LIGHT_ANGLES)
bdata.use_light_angles = true;
// try to create vertices BEFORE creating a batch,
// because if the vertex buffer is full, we need to finish this
// function, draw what we have so far, and then start a new set of batches
// request FOUR vertices at a time, this is more efficient
BatchVertex *bvs = bdata.vertices.request(4);
if (!bvs) {
// run out of space in the vertex buffer .. finish this function and draw what we have so far
// return where we got to
r_command_start = command_num;
return true;
}
// conditions for creating a new batch
if (old_batch_tex_id != r_fill_state.batch_tex_id) {
change_batch = true;
}
// we need to treat color change separately because we need to count these
// to decide whether to switch on the fly to colored vertices.
if (!r_fill_state.curr_batch->color.equals(col)) {
change_batch = true;
bdata.total_color_changes++;
}
if (change_batch) {
// put the tex pixel size in a local (less verbose and can be a register)
const BatchTex &batchtex = bdata.batch_textures[r_fill_state.batch_tex_id];
batchtex.tex_pixel_size.to(r_fill_state.texpixel_size);
if (bdata.settings_uv_contract) {
r_fill_state.contract_uvs = (batchtex.flags & VS::TEXTURE_FLAG_FILTER) == 0;
}
// need to preserve texpixel_size between items
r_fill_state.texpixel_size = r_fill_state.texpixel_size;
// open new batch (this should never fail, it dynamically grows)
r_fill_state.curr_batch = _batch_request_new(false);
r_fill_state.curr_batch->type = Batch::BT_RECT;
r_fill_state.curr_batch->color.set(col);
r_fill_state.curr_batch->batch_texture_id = r_fill_state.batch_tex_id;
r_fill_state.curr_batch->first_command = command_num;
r_fill_state.curr_batch->num_commands = 1;
r_fill_state.curr_batch->first_quad = bdata.total_quads;
} else {
// we could alternatively do the count when closing a batch .. perhaps more efficient
r_fill_state.curr_batch->num_commands++;
}
// fill the quad geometry
Vector2 mins = rect->rect.position;
if (r_fill_state.transform_mode == TM_TRANSLATE) {
_software_transform_vertex(mins, r_fill_state.transform_combined);
}
Vector2 maxs = mins + rect->rect.size;
// just aliases
BatchVertex *bA = &bvs[0];
BatchVertex *bB = &bvs[1];
BatchVertex *bC = &bvs[2];
BatchVertex *bD = &bvs[3];
bA->pos.x = mins.x;
bA->pos.y = mins.y;
bB->pos.x = maxs.x;
bB->pos.y = mins.y;
bC->pos.x = maxs.x;
bC->pos.y = maxs.y;
bD->pos.x = mins.x;
bD->pos.y = maxs.y;
// possibility of applying flips here for normal mapping .. but they don't seem to be used
if (rect->rect.size.x < 0) {
SWAP(bA->pos, bB->pos);
SWAP(bC->pos, bD->pos);
}
if (rect->rect.size.y < 0) {
SWAP(bA->pos, bD->pos);
SWAP(bB->pos, bC->pos);
}
if (r_fill_state.transform_mode == TM_ALL) {
_software_transform_vertex(bA->pos, r_fill_state.transform_combined);
_software_transform_vertex(bB->pos, r_fill_state.transform_combined);
_software_transform_vertex(bC->pos, r_fill_state.transform_combined);
_software_transform_vertex(bD->pos, r_fill_state.transform_combined);
}
// uvs
Vector2 src_min;
Vector2 src_max;
if (rect->flags & CANVAS_RECT_REGION) {
src_min = rect->source.position;
src_max = src_min + rect->source.size;
src_min *= r_fill_state.texpixel_size;
src_max *= r_fill_state.texpixel_size;
const float uv_epsilon = bdata.settings_uv_contract_amount;
// nudge offset for the maximum to prevent precision error on GPU reading into line outside the source rect
// this is very difficult to get right.
if (r_fill_state.contract_uvs) {
src_min.x += uv_epsilon;
src_min.y += uv_epsilon;
src_max.x -= uv_epsilon;
src_max.y -= uv_epsilon;
}
} else {
src_min = Vector2(0, 0);
src_max = Vector2(1, 1);
}
// 10% faster calculating the max first
Vector2 uvs[4] = {
src_min,
Vector2(src_max.x, src_min.y),
src_max,
Vector2(src_min.x, src_max.y),
};
// for encoding in light angle
// flips should be optimized out when not being used for light angle.
bool flip_h = false;
bool flip_v = false;
if (rect->flags & CANVAS_RECT_TRANSPOSE) {
SWAP(uvs[1], uvs[3]);
}
if (rect->flags & CANVAS_RECT_FLIP_H) {
SWAP(uvs[0], uvs[1]);
SWAP(uvs[2], uvs[3]);
flip_h = !flip_h;
flip_v = !flip_v;
}
if (rect->flags & CANVAS_RECT_FLIP_V) {
SWAP(uvs[0], uvs[3]);
SWAP(uvs[1], uvs[2]);
flip_v = !flip_v;
}
bA->uv.set(uvs[0]);
bB->uv.set(uvs[1]);
bC->uv.set(uvs[2]);
bD->uv.set(uvs[3]);
if (SEND_LIGHT_ANGLES) {
// we can either keep the light angles in sync with the verts when writing,
// or sync them up during translation. We are syncing in translation.
// N.B. There may be batches that don't require light_angles between batches that do.
float *angles = bdata.light_angles.request(4);
#if defined(TOOLS_ENABLED) && defined(DEBUG_ENABLED)
CRASH_COND(angles == nullptr);
#endif
float angle = 0.0f;
const float TWO_PI = Math_PI * 2;
if (r_fill_state.transform_mode != TM_NONE) {
const Transform2D &tr = r_fill_state.transform_combined;
// apply to an x axis
// the x axis and y axis can be taken directly from the transform (no need to xform identity vectors)
Vector2 x_axis(tr.elements[0][0], tr.elements[1][0]);
// have to do a y axis to check for scaling flips
// this is hassle and extra slowness. We could only allow flips via the flags.
Vector2 y_axis(tr.elements[0][1], tr.elements[1][1]);
// has the x / y axis flipped due to scaling?
float cross = x_axis.cross(y_axis);
if (cross < 0.0f) {
flip_v = !flip_v;
}
// passing an angle is smaller than a vector, it can be reconstructed in the shader
angle = x_axis.angle();
// we don't want negative angles, as negative is used to encode flips.
// This moves range from -PI to PI to 0 to TWO_PI
if (angle < 0.0f)
angle += TWO_PI;
} // if transform needed
// if horizontal flip, angle is shifted by 180 degrees
if (flip_h) {
angle += Math_PI;
// mod to get back to 0 to TWO_PI range
angle = fmodf(angle, TWO_PI);
}
// add 1 (to take care of zero floating point error with sign)
angle += 1.0f;
// flip if necessary to indicate a vertical flip in the shader
if (flip_v)
angle *= -1.0f;
// light angle must be sent for each vert, instead as a single uniform in the uniform draw method
// this has the benefit of enabling batching with light angles.
for (int n = 0; n < 4; n++) {
angles[n] = angle;
}
}
// increment quad count
bdata.total_quads++;
return false;
}
#endif // RASTERIZERCANVASGLES2_H
Reference in New Issue View Git Blame Copy Permalink