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godot/drivers/gles3/rasterizer_gles3.cpp
Fabio Alessandrelli 46fdba5f8b [HTML5] Add WebGL2 (GLES3) support using the OpenGL renderer. 
Note, the editor build requires the mbedtls module to be manually
enabled, as it is currently needed as a ResourceUID dependency.

This will need to be addressed in a separate PR.
2021-11-19 16:59:27 +01:00

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/*************************************************************************/
/* rasterizer_gles3.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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. */
/*************************************************************************/
#include "rasterizer_gles3.h"
#ifdef GLES3_BACKEND_ENABLED
#include "shader_gles3.h"
#include "core/config/project_settings.h"
#include "core/os/os.h"
#define _EXT_DEBUG_OUTPUT_SYNCHRONOUS_ARB 0x8242
#define _EXT_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH_ARB 0x8243
#define _EXT_DEBUG_CALLBACK_FUNCTION_ARB 0x8244
#define _EXT_DEBUG_CALLBACK_USER_PARAM_ARB 0x8245
#define _EXT_DEBUG_SOURCE_API_ARB 0x8246
#define _EXT_DEBUG_SOURCE_WINDOW_SYSTEM_ARB 0x8247
#define _EXT_DEBUG_SOURCE_SHADER_COMPILER_ARB 0x8248
#define _EXT_DEBUG_SOURCE_THIRD_PARTY_ARB 0x8249
#define _EXT_DEBUG_SOURCE_APPLICATION_ARB 0x824A
#define _EXT_DEBUG_SOURCE_OTHER_ARB 0x824B
#define _EXT_DEBUG_TYPE_ERROR_ARB 0x824C
#define _EXT_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB 0x824D
#define _EXT_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB 0x824E
#define _EXT_DEBUG_TYPE_PORTABILITY_ARB 0x824F
#define _EXT_DEBUG_TYPE_PERFORMANCE_ARB 0x8250
#define _EXT_DEBUG_TYPE_OTHER_ARB 0x8251
#define _EXT_MAX_DEBUG_MESSAGE_LENGTH_ARB 0x9143
#define _EXT_MAX_DEBUG_LOGGED_MESSAGES_ARB 0x9144
#define _EXT_DEBUG_LOGGED_MESSAGES_ARB 0x9145
#define _EXT_DEBUG_SEVERITY_HIGH_ARB 0x9146
#define _EXT_DEBUG_SEVERITY_MEDIUM_ARB 0x9147
#define _EXT_DEBUG_SEVERITY_LOW_ARB 0x9148
#define _EXT_DEBUG_OUTPUT 0x92E0
#ifndef GLAPIENTRY
#if defined(WINDOWS_ENABLED) && !defined(UWP_ENABLED)
#define GLAPIENTRY APIENTRY
#else
#define GLAPIENTRY
#endif
#endif
#if !defined(IPHONE_ENABLED) && !defined(JAVASCRIPT_ENABLED)
// We include EGL below to get debug callback on GLES2 platforms,
// but EGL is not available on iOS.
#define CAN_DEBUG
#endif
#if !defined(GLES_OVER_GL) && defined(CAN_DEBUG)
#include <GLES3/gl3.h>
#include <GLES3/gl3ext.h>
#include <GLES3/gl3platform.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#endif
#if defined(MINGW_ENABLED) || defined(_MSC_VER)
#define strcpy strcpy_s
#endif
void RasterizerGLES3::begin_frame(double frame_step) {
frame++;
delta = frame_step;
// from 3.2
time_total += frame_step * time_scale;
if (frame_step == 0) {
//to avoid hiccups
frame_step = 0.001;
}
double time_roll_over = GLOBAL_GET("rendering/limits/time/time_rollover_secs");
time_total = Math::fmod(time_total, time_roll_over);
storage.frame.time[0] = time_total;
storage.frame.time[1] = Math::fmod(time_total, 3600);
storage.frame.time[2] = Math::fmod(time_total, 900);
storage.frame.time[3] = Math::fmod(time_total, 60);
storage.frame.count++;
storage.frame.delta = frame_step;
storage.update_dirty_resources();
storage.info.render_final = storage.info.render;
storage.info.render.reset();
//scene->iteration();
}
void RasterizerGLES3::end_frame(bool p_swap_buffers) {
// if (OS::get_singleton()->is_layered_allowed()) {
// if (!OS::get_singleton()->get_window_per_pixel_transparency_enabled()) {
//clear alpha
// glColorMask(false, false, false, true);
// glClearColor(0.5, 0, 0, 1);
// glClear(GL_COLOR_BUFFER_BIT);
// glColorMask(true, true, true, true);
// }
// }
// glClearColor(1, 0, 0, 1);
// glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_ACCUM_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
if (p_swap_buffers)
DisplayServer::get_singleton()->swap_buffers();
else
glFinish();
}
#ifdef CAN_DEBUG
static void GLAPIENTRY _gl_debug_print(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar *message, const GLvoid *userParam) {
if (type == _EXT_DEBUG_TYPE_OTHER_ARB)
return;
if (type == _EXT_DEBUG_TYPE_PERFORMANCE_ARB)
return; //these are ultimately annoying, so removing for now
char debSource[256], debType[256], debSev[256];
if (source == _EXT_DEBUG_SOURCE_API_ARB)
strcpy(debSource, "OpenGL");
else if (source == _EXT_DEBUG_SOURCE_WINDOW_SYSTEM_ARB)
strcpy(debSource, "Windows");
else if (source == _EXT_DEBUG_SOURCE_SHADER_COMPILER_ARB)
strcpy(debSource, "Shader Compiler");
else if (source == _EXT_DEBUG_SOURCE_THIRD_PARTY_ARB)
strcpy(debSource, "Third Party");
else if (source == _EXT_DEBUG_SOURCE_APPLICATION_ARB)
strcpy(debSource, "Application");
else if (source == _EXT_DEBUG_SOURCE_OTHER_ARB)
strcpy(debSource, "Other");
if (type == _EXT_DEBUG_TYPE_ERROR_ARB)
strcpy(debType, "Error");
else if (type == _EXT_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB)
strcpy(debType, "Deprecated behavior");
else if (type == _EXT_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB)
strcpy(debType, "Undefined behavior");
else if (type == _EXT_DEBUG_TYPE_PORTABILITY_ARB)
strcpy(debType, "Portability");
else if (type == _EXT_DEBUG_TYPE_PERFORMANCE_ARB)
strcpy(debType, "Performance");
else if (type == _EXT_DEBUG_TYPE_OTHER_ARB)
strcpy(debType, "Other");
if (severity == _EXT_DEBUG_SEVERITY_HIGH_ARB)
strcpy(debSev, "High");
else if (severity == _EXT_DEBUG_SEVERITY_MEDIUM_ARB)
strcpy(debSev, "Medium");
else if (severity == _EXT_DEBUG_SEVERITY_LOW_ARB)
strcpy(debSev, "Low");
String output = String() + "GL ERROR: Source: " + debSource + "\tType: " + debType + "\tID: " + itos(id) + "\tSeverity: " + debSev + "\tMessage: " + message;
ERR_PRINT(output);
}
#endif
typedef void (*DEBUGPROCARB)(GLenum source,
GLenum type,
GLuint id,
GLenum severity,
GLsizei length,
const char *message,
const void *userParam);
typedef void (*DebugMessageCallbackARB)(DEBUGPROCARB callback, const void *userParam);
void RasterizerGLES3::initialize() {
print_verbose("Using OpenGL video driver");
storage._main_thread_id = Thread::get_caller_id();
#ifdef GLAD_ENABLED
if (!gladLoadGL()) {
ERR_PRINT("Error initializing GLAD");
return;
}
#endif
#ifdef GLAD_ENABLED
if (OS::get_singleton()->is_stdout_verbose()) {
if (GLAD_GL_ARB_debug_output) {
glEnable(_EXT_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
glDebugMessageCallbackARB(_gl_debug_print, NULL);
glEnable(_EXT_DEBUG_OUTPUT);
} else {
print_line("OpenGL debugging not supported!");
}
}
#endif // GLAD_ENABLED
// For debugging
#ifdef CAN_DEBUG
#ifdef GLES_OVER_GL
if (OS::get_singleton()->is_stdout_verbose() && GLAD_GL_ARB_debug_output) {
glDebugMessageControlARB(_EXT_DEBUG_SOURCE_API_ARB, _EXT_DEBUG_TYPE_ERROR_ARB, _EXT_DEBUG_SEVERITY_HIGH_ARB, 0, NULL, GL_TRUE);
glDebugMessageControlARB(_EXT_DEBUG_SOURCE_API_ARB, _EXT_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB, _EXT_DEBUG_SEVERITY_HIGH_ARB, 0, NULL, GL_TRUE);
glDebugMessageControlARB(_EXT_DEBUG_SOURCE_API_ARB, _EXT_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB, _EXT_DEBUG_SEVERITY_HIGH_ARB, 0, NULL, GL_TRUE);
glDebugMessageControlARB(_EXT_DEBUG_SOURCE_API_ARB, _EXT_DEBUG_TYPE_PORTABILITY_ARB, _EXT_DEBUG_SEVERITY_HIGH_ARB, 0, NULL, GL_TRUE);
glDebugMessageControlARB(_EXT_DEBUG_SOURCE_API_ARB, _EXT_DEBUG_TYPE_PERFORMANCE_ARB, _EXT_DEBUG_SEVERITY_HIGH_ARB, 0, NULL, GL_TRUE);
glDebugMessageControlARB(_EXT_DEBUG_SOURCE_API_ARB, _EXT_DEBUG_TYPE_OTHER_ARB, _EXT_DEBUG_SEVERITY_HIGH_ARB, 0, NULL, GL_TRUE);
// glDebugMessageInsertARB(
// GL_DEBUG_SOURCE_API_ARB,
// GL_DEBUG_TYPE_OTHER_ARB, 1,
// GL_DEBUG_SEVERITY_HIGH_ARB, 5, "hello");
}
#else
if (OS::get_singleton()->is_stdout_verbose()) {
DebugMessageCallbackARB callback = (DebugMessageCallbackARB)eglGetProcAddress("glDebugMessageCallback");
if (!callback) {
callback = (DebugMessageCallbackARB)eglGetProcAddress("glDebugMessageCallbackKHR");
}
if (callback) {
print_line("godot: ENABLING GL DEBUG");
glEnable(_EXT_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
callback(_gl_debug_print, NULL);
glEnable(_EXT_DEBUG_OUTPUT);
}
}
#endif // GLES_OVER_GL
#endif // CAN_DEBUG
print_line("OpenGL Renderer: " + RS::get_singleton()->get_video_adapter_name());
storage.initialize();
canvas.initialize();
// scene.initialize();
// make sure the OS knows to only access the renderer from the main thread
OS::get_singleton()->set_render_main_thread_mode(OS::RENDER_MAIN_THREAD_ONLY);
}
RasterizerGLES3::RasterizerGLES3() {
canvas.storage = &storage;
canvas.scene_render = &scene;
storage.canvas = &canvas;
//scene.storage = &storage;
storage.scene = &scene;
}
void RasterizerGLES3::prepare_for_blitting_render_targets() {
}
void RasterizerGLES3::_blit_render_target_to_screen(RID p_render_target, const Rect2 &p_screen_rect) {
ERR_FAIL_COND(storage.frame.current_rt);
// print_line("_blit_render_target_to_screen " + itos (p_screen) + ", rect " + String(Variant(p_screen_rect)));
RasterizerStorageGLES3::RenderTarget *rt = storage.render_target_owner.get_or_null(p_render_target);
ERR_FAIL_COND(!rt);
canvas._set_texture_rect_mode(true);
canvas.state.canvas_shader.set_custom_shader(0);
canvas.state.canvas_shader.bind();
canvas.canvas_begin();
glDisable(GL_BLEND);
storage.bind_framebuffer_system();
glActiveTexture(GL_TEXTURE0 + storage.config.max_texture_image_units - 1);
if (rt->external.fbo != 0) {
glBindTexture(GL_TEXTURE_2D, rt->external.color);
} else {
glBindTexture(GL_TEXTURE_2D, rt->color);
}
canvas.draw_generic_textured_rect(p_screen_rect, Rect2(0, 0, 1, -1));
glBindTexture(GL_TEXTURE_2D, 0);
canvas.canvas_end();
}
// is this p_screen useless in a multi window environment?
void RasterizerGLES3::blit_render_targets_to_screen(DisplayServer::WindowID p_screen, const BlitToScreen *p_render_targets, int p_amount) {
// do this once off for all blits
storage.bind_framebuffer_system();
storage.frame.current_rt = nullptr;
for (int i = 0; i < p_amount; i++) {
const BlitToScreen &blit = p_render_targets[i];
RID rid_rt = blit.render_target;
Rect2 dst_rect = blit.dst_rect;
_blit_render_target_to_screen(rid_rt, dst_rect);
}
}
void RasterizerGLES3::set_boot_image(const Ref<Image> &p_image, const Color &p_color, bool p_scale, bool p_use_filter) {
if (p_image.is_null() || p_image->is_empty())
return;
int window_w = 640; //OS::get_singleton()->get_video_mode(0).width;
int window_h = 480; //OS::get_singleton()->get_video_mode(0).height;
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glViewport(0, 0, window_w, window_h);
glDisable(GL_BLEND);
glDepthMask(GL_FALSE);
if (false) {
// if (OS::get_singleton()->get_window_per_pixel_transparency_enabled()) {
glClearColor(0.0, 0.0, 0.0, 0.0);
} else {
glClearColor(p_color.r, p_color.g, p_color.b, 1.0);
}
glClear(GL_COLOR_BUFFER_BIT);
canvas.canvas_begin();
RID texture = storage.texture_create();
//storage.texture_allocate(texture, p_image->get_width(), p_image->get_height(), 0, p_image->get_format(), VS::TEXTURE_TYPE_2D, p_use_filter ? VS::TEXTURE_FLAG_FILTER : 0);
storage._texture_allocate_internal(texture, p_image->get_width(), p_image->get_height(), 0, p_image->get_format(), RenderingDevice::TEXTURE_TYPE_2D);
storage.texture_set_data(texture, p_image);
Rect2 imgrect(0, 0, p_image->get_width(), p_image->get_height());
Rect2 screenrect;
if (p_scale) {
if (window_w > window_h) {
//scale horizontally
screenrect.size.y = window_h;
screenrect.size.x = imgrect.size.x * window_h / imgrect.size.y;
screenrect.position.x = (window_w - screenrect.size.x) / 2;
} else {
//scale vertically
screenrect.size.x = window_w;
screenrect.size.y = imgrect.size.y * window_w / imgrect.size.x;
screenrect.position.y = (window_h - screenrect.size.y) / 2;
}
} else {
screenrect = imgrect;
screenrect.position += ((Size2(window_w, window_h) - screenrect.size) / 2.0).floor();
}
RasterizerStorageGLES3::Texture *t = storage.texture_owner.get_or_null(texture);
glActiveTexture(GL_TEXTURE0 + storage.config.max_texture_image_units - 1);
glBindTexture(GL_TEXTURE_2D, t->tex_id);
canvas.draw_generic_textured_rect(screenrect, Rect2(0, 0, 1, 1));
glBindTexture(GL_TEXTURE_2D, 0);
canvas.canvas_end();
storage.free(texture);
end_frame(true);
}
#endif // GLES3_BACKEND_ENABLED
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