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//-----------------------------------------------------------------------------
// Name: hudimage.cpp
// Developer: Wolfire Games LLC
// Description:
// License: Read below
//-----------------------------------------------------------------------------
//
//
// Copyright 2022 Wolfire Games LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//-----------------------------------------------------------------------------
#include "hudimage.h"
#include <Graphics/shaders.h>
#include <Graphics/graphics.h>
#include <Graphics/vboringcontainer.h>
#include <Graphics/text.h>
#include <Timing/timingevent.h>
#include <Timing/intel_gl_perf.h>
#include <Scripting/angelscript/ascontext.h>
#include <Wrappers/glm.h>
#include <Internal/profiler.h>
#include <Main/engine.h>
class HUDImageZCompare {
public:
bool operator()(const HUDImage &a, const HUDImage &b) {
return a.pos[2] < b.pos[2];
}
};
struct HUDImageGLState {
GLState gl_state;
HUDImageGLState() {
gl_state.blend = true;
gl_state.blend_src = GL_SRC_ALPHA;
gl_state.blend_dst = GL_ONE_MINUS_SRC_ALPHA;
gl_state.cull_face = false;
gl_state.depth_test = false;
gl_state.depth_write = false;
}
};
static const HUDImageGLState hud_gl_state;
void HUDImages::Draw() {
PROFILER_GPU_ZONE(g_profiler_ctx, "HUDImages::Draw()");
if(hud_images.empty()){
return;
}
CHECK_GL_ERROR();
Graphics* graphics = Graphics::Instance();
Shaders* shaders = Shaders::Instance();
Textures* textures = Textures::Instance();
{
PROFILER_ZONE(g_profiler_ctx, "HUDImages sort");
// Sort HUD images so we can draw them in order of depth
std::sort(hud_images.begin(), hud_images.end(), HUDImageZCompare());
}
PROFILER_ENTER(g_profiler_ctx, "HUDImages setup");
int shader_id = shaders->returnProgram("simple_2d #TEXTURE #FLIPPED");
shaders->setProgram(shader_id);
int vert_coord_id = shaders->returnShaderAttrib("vert_coord", shader_id);
int tex_coord_id = shaders->returnShaderAttrib("tex_coord", shader_id);
int mvp_mat_id = shaders->returnShaderVariable("mvp_mat", shader_id);
int color_id = shaders->returnShaderVariable("color", shader_id);
graphics->setGLState(hud_gl_state.gl_state);
glm::mat4 proj_mat;
proj_mat = glm::ortho(0.0f, (float)graphics->window_dims[0], 0.0f, (float)graphics->window_dims[1]);
glUniformMatrix4fv(mvp_mat_id, 1, false, (GLfloat*)&proj_mat);
graphics->SetClientActiveTexture(0);
graphics->EnableVertexAttribArray(vert_coord_id);
graphics->EnableVertexAttribArray(tex_coord_id);
CHECK_GL_ERROR();
PROFILER_LEAVE(g_profiler_ctx);
{
PROFILER_ZONE(g_profiler_ctx, "HUDImages draw loop");
for(unsigned i=0; i<hud_images.size(); ++i){
PROFILER_GPU_ZONE(g_profiler_ctx, "HUDImages draw iteration");
CHECK_GL_ERROR();
const HUDImage& hi = hud_images[i];
if(hi.color[3] <= 0.0f){
continue;
}
int width = textures->getWidth(hi.texture_ref);
int height = textures->getHeight(hi.texture_ref);
if(!hi.text){
// Image need to be scaled up to compensate for texture reduction
width = textures->getReducedWidth(hi.texture_ref);
height = textures->getReducedHeight(hi.texture_ref);
// Image use non-premultiplied alpha
graphics->SetBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
} else {
graphics->SetBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); // Text uses premultiplied alpha
}
CHECK_GL_ERROR();
if( hi.texture_ref.valid() ) {
textures->bindTexture(hi.texture_ref);
if(hi.tex_scale[0] != 1.0f){
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
} else {
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
}
if(hi.tex_scale[1] != 1.0f){
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
} else {
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
}
glUniform4fv(color_id, 1, (GLfloat*)&hi.color);
CHECK_GL_ERROR();
const vec2 &to = hi.tex_offset;
const vec2 &ts = hi.tex_scale;
const vec3 &s = hi.scale;
const vec3 &p = hi.pos;
float w = (float)width;
float h = (float)height;
GLfloat data[] = {
to[0], to[1], p[0], p[1],
ts[0]+to[0], to[1], p[0]+w*s[0], p[1],
ts[0]+to[0], ts[1]+to[1], p[0]+w*s[0], p[1]+h*s[1],
to[0], ts[1]+to[1], p[0], p[1]+h*s[1],
};
if(hi.text){
data[1] = 1.0f - data[1];
data[5] = 1.0f - data[5];
data[9] = 1.0f - data[9];
data[13] = 1.0f - data[13];
}
static const GLuint indices[] = {0, 1, 2, 0, 2, 3};
static VBORingContainer data_vbo(sizeof(data), kVBOFloat | kVBODynamic );
static VBOContainer index_vbo;
if(!index_vbo.valid()){
index_vbo.Fill(kVBOElement | kVBOStatic, sizeof(indices), (void*)indices);
}
index_vbo.Bind();
data_vbo.Fill(sizeof(data), (void*)data);
data_vbo.Bind();
index_vbo.Bind();
CHECK_GL_ERROR();
glVertexAttribPointer(vert_coord_id, 2, GL_FLOAT, false, 4*sizeof(GLfloat), (const void*)(data_vbo.offset()+(2*sizeof(GLfloat))));
CHECK_GL_ERROR();
glVertexAttribPointer(tex_coord_id, 2, GL_FLOAT, false, 4*sizeof(GLfloat), (const void*)(data_vbo.offset()));
graphics->DrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
}
CHECK_GL_ERROR();
}
}
graphics->ResetVertexAttribArrays();
hud_images.clear();
}
HUDImages::HUDImages()
{}
HUDImage* HUDImages::AddImage() {
hud_images.resize(hud_images.size()+1);
HUDImage& hud_image = hud_images.back();
hud_image.pos = vec3(0.0f);
hud_image.tex_offset = vec2(0.0f);
hud_image.tex_scale = vec2(1.0f);
hud_image.scale = vec3(1.0f);
hud_image.color = vec4(1.0f);
return &hud_image;
}
void HUDImages::AttachToContext( ASContext *as_context ) {
as_context->RegisterObjectType("HUDImage", 0, asOBJ_REF | asOBJ_NOCOUNT );
as_context->RegisterObjectProperty("HUDImage","vec3 position",asOFFSET(HUDImage,pos));
as_context->RegisterObjectProperty("HUDImage","vec3 scale",asOFFSET(HUDImage,scale));
as_context->RegisterObjectProperty("HUDImage","vec2 tex_scale",asOFFSET(HUDImage,tex_scale));
as_context->RegisterObjectProperty("HUDImage","vec2 tex_offset",asOFFSET(HUDImage,tex_offset));
as_context->RegisterObjectProperty("HUDImage","vec4 color",asOFFSET(HUDImage,color));
as_context->RegisterObjectMethod("HUDImage", "float GetWidth() const", asMETHOD(HUDImage, GetWidth), asCALL_THISCALL);
as_context->RegisterObjectMethod("HUDImage", "float GetHeight() const", asMETHOD(HUDImage, GetHeight), asCALL_THISCALL);
as_context->RegisterObjectMethod("HUDImage", "bool SetImageFromPath(const string &in)", asMETHOD(HUDImage, SetImageFromPath), asCALL_THISCALL);
as_context->RegisterObjectMethod("HUDImage", "void SetImageFromText(const TextCanvasTexture@)", asMETHOD(HUDImage, SetImageFromText), asCALL_THISCALL);
as_context->DocsCloseBrace();
as_context->RegisterObjectType("HUDImages", 0, asOBJ_REF | asOBJ_NOHANDLE);
as_context->RegisterObjectMethod("HUDImages","HUDImage@ AddImage()",asMETHOD(HUDImages, AddImage), asCALL_THISCALL);
as_context->RegisterObjectMethod("HUDImages","void Draw()", asMETHOD(HUDImages, Draw), asCALL_THISCALL);
as_context->DocsCloseBrace();
as_context->RegisterGlobalProperty("HUDImages hud", this);
}
void HUDImage::SetImageFromText( const TextCanvasTexture *text_canvas_texture) {
texture_asset.clear();
texture_ref = text_canvas_texture->GetTexture();
text = true;
}
bool HUDImage::SetImageFromPath( const std::string &path ) {
texture_asset = Engine::Instance()->GetAssetManager()->LoadSync<TextureAsset>(path, PX_NOMIPMAP | PX_NOREDUCE, 0x0);
if( texture_asset.valid() ) {
texture_ref = texture_asset->GetTextureRef();
text = false;
return true;
} else {
LOGE << "Loading " << path << "for HUDImage failed, will disable rendering for this object";
texture_ref.clear();
return false;
}
}
float HUDImage::GetWidth() const {
return (float)(Textures::Instance()->getReducedWidth(texture_ref));
}
float HUDImage::GetHeight() const {
return (float)(Textures::Instance()->getReducedHeight(texture_ref));
}
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