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24d54b972e
bgfx/examples/common/imgui/imgui.cpp
Branimir Karadžić 24d54b972e Cleanup.
2014-06-23 20:08:08 -07:00

2008 lines
46 KiB
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/*
* Copyright 2011-2014 Branimir Karadzic. All rights reserved.
* License: http://www.opensource.org/licenses/BSD-2-Clause
*/
// This code is based on:
//
// Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
//
// Source altered and distributed from https://github.com/AdrienHerubel/imgui
#include <stdio.h>
#include <bx/string.h>
#include <bx/uint32_t.h>
#include <bx/fpumath.h>
#include <bgfx.h>
#include "../entry/dbg.h"
#include "imgui.h"
#include "../nanovg/nanovg.h"
#include "vs_imgui_color.bin.h"
#include "fs_imgui_color.bin.h"
#include "vs_imgui_texture.bin.h"
#include "fs_imgui_texture.bin.h"
#define MAX_TEMP_COORDS 100
#define NUM_CIRCLE_VERTS (8 * 4)
static const int32_t BUTTON_HEIGHT = 20;
static const int32_t SLIDER_HEIGHT = 20;
static const int32_t SLIDER_MARKER_WIDTH = 10;
static const int32_t CHECK_SIZE = 8;
static const int32_t DEFAULT_SPACING = 4;
static const int32_t TEXT_HEIGHT = 8;
static const int32_t SCROLL_AREA_PADDING = 6;
static const int32_t INDENT_SIZE = 16;
static const int32_t AREA_HEADER = 28;
static const int32_t COLOR_WHEEL_PADDING = 60;
static const float s_tabStops[4] = {150, 210, 270, 330};
static void* imguiMalloc(size_t size, void* /*_userptr*/)
{
return malloc(size);
}
static void imguiFree(void* _ptr, void* /*_userptr*/)
{
free(_ptr);
}
#define STBTT_malloc(_x, _y) imguiMalloc(_x, _y)
#define STBTT_free(_x, _y) imguiFree(_x, _y)
#define STB_TRUETYPE_IMPLEMENTATION
#include <stb_truetype/stb_truetype.h>
namespace
{
struct PosColorVertex
{
float m_x;
float m_y;
uint32_t m_abgr;
static void init()
{
ms_decl
.begin()
.add(bgfx::Attrib::Position, 2, bgfx::AttribType::Float)
.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true)
.end();
}
static bgfx::VertexDecl ms_decl;
};
bgfx::VertexDecl PosColorVertex::ms_decl;
struct PosColorUvVertex
{
float m_x;
float m_y;
float m_u;
float m_v;
uint32_t m_abgr;
static void init()
{
ms_decl
.begin()
.add(bgfx::Attrib::Position, 2, bgfx::AttribType::Float)
.add(bgfx::Attrib::TexCoord0, 2, bgfx::AttribType::Float)
.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true)
.end();
}
static bgfx::VertexDecl ms_decl;
};
bgfx::VertexDecl PosColorUvVertex::ms_decl;
} // namespace
struct Imgui
{
Imgui()
: m_mx(-1)
, m_my(-1)
, m_scroll(0)
, m_active(0)
, m_hot(0)
, m_hotToBe(0)
, m_dragX(0)
, m_dragY(0)
, m_dragOrig(0)
, m_widgetX(0)
, m_widgetY(0)
, m_widgetW(100)
, m_left(false)
, m_leftPressed(false)
, m_leftReleased(false)
, m_isHot(false)
, m_isActive(false)
, m_wentActive(false)
, m_insideCurrentScroll(false)
, m_areaId(0)
, m_widgetId(0)
, m_scissor(UINT16_MAX)
, m_scrollTop(0)
, m_scrollBottom(0)
, m_scrollRight(0)
, m_scrollAreaTop(0)
, m_scrollAreaWidth(0)
, m_scrollAreaX(0)
, m_scrollVal(NULL)
, m_focusTop(0)
, m_focusBottom(0)
, m_scrollId(0)
, m_insideScrollArea(false)
, m_textureWidth(512)
, m_textureHeight(512)
, m_halfTexel(0.0f)
, m_nvg(NULL)
, m_view(31)
{
m_invTextureWidth = 1.0f/m_textureWidth;
m_invTextureHeight = 1.0f/m_textureHeight;
u_texColor.idx = bgfx::invalidHandle;
m_fontTexture.idx = bgfx::invalidHandle;
m_colorProgram.idx = bgfx::invalidHandle;
m_textureProgram.idx = bgfx::invalidHandle;
}
bool create(const void* _data)
{
m_nvg = nvgCreate(512, 512, 1, m_view);
for (int32_t ii = 0; ii < NUM_CIRCLE_VERTS; ++ii)
{
float a = (float)ii / (float)NUM_CIRCLE_VERTS * (float)(M_PI * 2.0);
m_circleVerts[ii * 2 + 0] = cosf(a);
m_circleVerts[ii * 2 + 1] = sinf(a);
}
PosColorVertex::init();
PosColorUvVertex::init();
u_texColor = bgfx::createUniform("u_texColor", bgfx::UniformType::Uniform1i);
const bgfx::Memory* vs_imgui_color;
const bgfx::Memory* fs_imgui_color;
const bgfx::Memory* vs_imgui_texture;
const bgfx::Memory* fs_imgui_texture;
switch (bgfx::getRendererType() )
{
case bgfx::RendererType::Direct3D9:
vs_imgui_color = bgfx::makeRef(vs_imgui_color_dx9, sizeof(vs_imgui_color_dx9) );
fs_imgui_color = bgfx::makeRef(fs_imgui_color_dx9, sizeof(fs_imgui_color_dx9) );
vs_imgui_texture = bgfx::makeRef(vs_imgui_texture_dx9, sizeof(vs_imgui_texture_dx9) );
fs_imgui_texture = bgfx::makeRef(fs_imgui_texture_dx9, sizeof(fs_imgui_texture_dx9) );
m_halfTexel = 0.5f;
break;
case bgfx::RendererType::Direct3D11:
vs_imgui_color = bgfx::makeRef(vs_imgui_color_dx11, sizeof(vs_imgui_color_dx11) );
fs_imgui_color = bgfx::makeRef(fs_imgui_color_dx11, sizeof(fs_imgui_color_dx11) );
vs_imgui_texture = bgfx::makeRef(vs_imgui_texture_dx11, sizeof(vs_imgui_texture_dx11) );
fs_imgui_texture = bgfx::makeRef(fs_imgui_texture_dx11, sizeof(fs_imgui_texture_dx11) );
break;
default:
vs_imgui_color = bgfx::makeRef(vs_imgui_color_glsl, sizeof(vs_imgui_color_glsl) );
fs_imgui_color = bgfx::makeRef(fs_imgui_color_glsl, sizeof(fs_imgui_color_glsl) );
vs_imgui_texture = bgfx::makeRef(vs_imgui_texture_glsl, sizeof(vs_imgui_texture_glsl) );
fs_imgui_texture = bgfx::makeRef(fs_imgui_texture_glsl, sizeof(fs_imgui_texture_glsl) );
break;
}
bgfx::ShaderHandle vsh;
bgfx::ShaderHandle fsh;
vsh = bgfx::createShader(vs_imgui_color);
fsh = bgfx::createShader(fs_imgui_color);
m_colorProgram = bgfx::createProgram(vsh, fsh);
bgfx::destroyShader(vsh);
bgfx::destroyShader(fsh);
vsh = bgfx::createShader(vs_imgui_texture);
fsh = bgfx::createShader(fs_imgui_texture);
m_textureProgram = bgfx::createProgram(vsh, fsh);
bgfx::destroyShader(vsh);
bgfx::destroyShader(fsh);
const bgfx::Memory* mem = bgfx::alloc(m_textureWidth * m_textureHeight);
stbtt_BakeFontBitmap( (uint8_t*)_data, 0, 15.0f, mem->data, m_textureWidth, m_textureHeight, 32, 96, m_cdata);
m_fontTexture = bgfx::createTexture2D(m_textureWidth, m_textureHeight, 1, bgfx::TextureFormat::R8, BGFX_TEXTURE_NONE, mem);
return true;
}
void destroy()
{
bgfx::destroyUniform(u_texColor);
bgfx::destroyTexture(m_fontTexture);
bgfx::destroyProgram(m_colorProgram);
bgfx::destroyProgram(m_textureProgram);
nvgDelete(m_nvg);
}
bool anyActive() const
{
return m_active != 0;
}
bool isActive(uint32_t _id) const
{
return m_active == _id;
}
bool isHot(uint32_t _id) const
{
return m_hot == _id;
}
bool inRect(int32_t _x, int32_t _y, int32_t _width, int32_t _height, bool _checkScroll = true) const
{
return (!_checkScroll || m_insideCurrentScroll)
&& m_mx >= _x
&& m_mx <= _x + _width
&& m_my >= _y
&& m_my <= _y + _height;
}
void clearInput()
{
m_leftPressed = false;
m_leftReleased = false;
m_scroll = 0;
}
void clearActive()
{
m_active = 0;
// mark all UI for this frame as processed
clearInput();
}
void setActive(uint32_t _id)
{
m_active = _id;
m_wentActive = true;
}
void setHot(uint32_t _id)
{
m_hotToBe = _id;
}
bool buttonLogic(uint32_t _id, bool _over)
{
bool res = false;
// process down
if (!anyActive() )
{
if (_over)
{
setHot(_id);
}
if (isHot(_id)
&& m_leftPressed)
{
setActive(_id);
}
}
// if button is active, then react on left up
if (isActive(_id) )
{
m_isActive = true;
if (_over)
{
setHot(_id);
}
if (m_leftReleased)
{
if (isHot(_id) )
{
res = true;
}
clearActive();
}
}
if (isHot(_id) )
{
m_isHot = true;
}
return res;
}
void updateInput(int32_t _mx, int32_t _my, uint8_t _button, int32_t _scroll)
{
bool left = (_button & IMGUI_MBUT_LEFT) != 0;
m_mx = _mx;
m_my = _my;
m_leftPressed = !m_left && left;
m_leftReleased = m_left && !left;
m_left = left;
m_scroll = _scroll;
}
void beginFrame(int32_t _mx, int32_t _my, uint8_t _button, int32_t _scroll, uint16_t _width, uint16_t _height, uint8_t _view)
{
nvgBeginFrame(m_nvg, _width, _height, 1.0f, NVG_STRAIGHT_ALPHA);
m_view = _view;
bgfx::setViewSeq(_view, true);
bgfx::setViewRect(_view, 0, 0, _width, _height);
float proj[16];
bx::mtxOrtho(proj, 0.0f, (float)_width, (float)_height, 0.0f, 0.0f, 1000.0f);
bgfx::setViewTransform(_view, NULL, proj);
updateInput(_mx, _my, _button, _scroll);
m_hot = m_hotToBe;
m_hotToBe = 0;
m_wentActive = false;
m_isActive = false;
m_isHot = false;
m_widgetX = 0;
m_widgetY = 0;
m_widgetW = 0;
m_areaId = 1;
m_widgetId = 1;
}
void endFrame()
{
clearInput();
nvgEndFrame(m_nvg);
}
bool beginScrollArea(const char* _name, int32_t _x, int32_t _y, int32_t _width, int32_t _height, int32_t* _scroll)
{
m_areaId++;
m_widgetId = 0;
m_scrollId = (m_areaId << 16) | m_widgetId;
m_widgetX = _x + SCROLL_AREA_PADDING;
m_widgetY = _y + AREA_HEADER + (*_scroll);
m_widgetW = _width - SCROLL_AREA_PADDING * 4;
m_scrollTop = _y + SCROLL_AREA_PADDING;
m_scrollBottom = _y - AREA_HEADER + _height;
m_scrollRight = _x + _width - SCROLL_AREA_PADDING * 3;
m_scrollVal = _scroll;
m_scrollAreaX = _x;
m_scrollAreaWidth = _width;
m_scrollAreaTop = m_widgetY - AREA_HEADER;
m_focusTop = _y - AREA_HEADER;
m_focusBottom = _y - AREA_HEADER + _height;
m_insideScrollArea = inRect(_x, _y, _width, _height, false);
m_insideCurrentScroll = m_insideScrollArea;
drawRoundedRect( (float)_x
, (float)_y
, (float)_width
, (float)_height
, 6
, imguiRGBA(0, 0, 0, 192)
);
drawText(_x + AREA_HEADER / 2
, _y + AREA_HEADER / 2
, ImguiTextAlign::Left
, _name
, imguiRGBA(255, 255, 255, 128)
);
nvgScissor(m_nvg
, float(_x + SCROLL_AREA_PADDING)
, float(_y + SCROLL_AREA_PADDING)
, float(_width - SCROLL_AREA_PADDING * 4)
, float(_height - AREA_HEADER - SCROLL_AREA_PADDING)
);
m_scissor = bgfx::setScissor(uint16_t(_x + SCROLL_AREA_PADDING)
, uint16_t(_y + SCROLL_AREA_PADDING)
, uint16_t(_width - SCROLL_AREA_PADDING * 4)
, uint16_t(_height - AREA_HEADER - SCROLL_AREA_PADDING)
);
return m_insideScrollArea;
}
void endScrollArea()
{
// Disable scissoring.
m_scissor = UINT16_MAX;
nvgResetScissor(m_nvg);
// Draw scroll bar
int32_t xx = m_scrollRight + SCROLL_AREA_PADDING / 2;
int32_t yy = m_scrollTop;
int32_t width = SCROLL_AREA_PADDING * 2;
int32_t height = m_scrollBottom - m_scrollTop;
int32_t stop = m_scrollAreaTop;
int32_t sbot = m_widgetY;
int32_t sh = sbot - stop; // The scrollable area height.
float barHeight = (float)height / (float)sh;
if (barHeight < 1)
{
float barY = (float)(yy - stop) / (float)sh;
if (barY < 0)
{
barY = 0;
}
if (barY > 1)
{
barY = 1;
}
// Handle scroll bar logic.
uint32_t hid = m_scrollId;
int32_t hx = xx;
int32_t hy = yy + (int)(barY * height);
int32_t hw = width;
int32_t hh = (int)(barHeight * height);
const int32_t range = height - (hh - 1);
bool over = inRect(hx, hy, hw, hh);
buttonLogic(hid, over);
if (isActive(hid) )
{
float u = (float)(hy - yy) / (float)range;
if (m_wentActive)
{
m_dragY = m_my;
m_dragOrig = u;
}
if (m_dragY != m_my)
{
u = m_dragOrig + (m_my - m_dragY) / (float)range;
if (u < 0)
{
u = 0;
}
if (u > 1)
{
u = 1;
}
*m_scrollVal = (int)(u * (height - sh) );
}
}
// BG
drawRoundedRect( (float)xx
, (float)yy
, (float)width
, (float)height
, (float)width / 2 - 1
, imguiRGBA(0, 0, 0, 196)
);
// Bar
if (isActive(hid) )
{
drawRoundedRect( (float)hx
, (float)hy
, (float)hw
, (float)hh
, (float)width / 2 - 1
, imguiRGBA(255, 196, 0, 196)
);
}
else
{
drawRoundedRect( (float)hx
, (float)hy
, (float)hw
, (float)hh
, (float)width / 2 - 1
, isHot(hid) ? imguiRGBA(255, 196, 0, 96) : imguiRGBA(255, 255, 255, 64)
);
}
// Handle mouse scrolling.
if (m_insideScrollArea) // && !anyActive())
{
if (m_scroll)
{
*m_scrollVal += 20 * m_scroll;
if (*m_scrollVal < 0)
{
*m_scrollVal = 0;
}
if (*m_scrollVal > (sh - height) )
{
*m_scrollVal = (sh - height);
}
}
}
}
m_insideCurrentScroll = false;
}
bool button(const char* _text, bool _enabled)
{
m_widgetId++;
uint32_t id = (m_areaId << 16) | m_widgetId;
int32_t xx = m_widgetX;
int32_t yy = m_widgetY;
int32_t width = m_widgetW;
int32_t height = BUTTON_HEIGHT;
m_widgetY += BUTTON_HEIGHT + DEFAULT_SPACING;
bool over = _enabled && inRect(xx, yy, width, height);
bool res = buttonLogic(id, over);
drawRoundedRect( (float)xx
, (float)yy
, (float)width
, (float)height
, (float)BUTTON_HEIGHT / 2 - 1
, imguiRGBA(128, 128, 128, isActive(id) ? 196 : 96)
);
if (_enabled)
{
drawText(xx + BUTTON_HEIGHT / 2
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, _text
, isHot(id) ? imguiRGBA(255, 196, 0, 255) : imguiRGBA(255, 255, 255, 200)
);
}
else
{
drawText(xx + BUTTON_HEIGHT / 2
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, _text
, imguiRGBA(128, 128, 128, 200)
);
}
return res;
}
bool item(const char* _text, bool _enabled)
{
m_widgetId++;
uint32_t id = (m_areaId << 16) | m_widgetId;
int32_t xx = m_widgetX;
int32_t yy = m_widgetY;
int32_t width = m_widgetW;
int32_t height = BUTTON_HEIGHT;
m_widgetY += BUTTON_HEIGHT + DEFAULT_SPACING;
bool over = _enabled && inRect(xx, yy, width, height);
bool res = buttonLogic(id, over);
if (isHot(id) )
{
drawRoundedRect( (float)xx
, (float)yy
, (float)width
, (float)height
, 2.0f
, imguiRGBA(255, 196, 0, isActive(id) ? 196 : 96)
);
}
if (_enabled)
{
drawText(xx + BUTTON_HEIGHT / 2
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, _text
, imguiRGBA(255, 255, 255, 200)
);
}
else
{
drawText(xx + BUTTON_HEIGHT / 2
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, _text
, imguiRGBA(128, 128, 128, 200)
);
}
return res;
}
bool check(const char* _text, bool _checked, bool _enabled)
{
m_widgetId++;
uint32_t id = (m_areaId << 16) | m_widgetId;
int32_t xx = m_widgetX;
int32_t yy = m_widgetY;
int32_t width = m_widgetW;
int32_t height = BUTTON_HEIGHT;
m_widgetY += BUTTON_HEIGHT + DEFAULT_SPACING;
bool over = _enabled && inRect(xx, yy, width, height);
bool res = buttonLogic(id, over);
const int32_t cx = xx + BUTTON_HEIGHT / 2 - CHECK_SIZE / 2;
const int32_t cy = yy + BUTTON_HEIGHT / 2 - CHECK_SIZE / 2;
drawRoundedRect( (float)cx - 3
, (float)cy - 3
, (float)CHECK_SIZE + 6
, (float)CHECK_SIZE + 6
, 4
, imguiRGBA(128, 128, 128, isActive(id) ? 196 : 96)
);
if (_checked)
{
if (_enabled)
{
drawRoundedRect( (float)cx
, (float)cy
, (float)CHECK_SIZE
, (float)CHECK_SIZE
, (float)CHECK_SIZE / 2 - 1
, imguiRGBA(255, 255, 255, isActive(id) ? 255 : 200)
);
}
else
{
drawRoundedRect( (float)cx
, (float)cy
, (float)CHECK_SIZE
, (float)CHECK_SIZE
, (float)CHECK_SIZE / 2 - 1
, imguiRGBA(128, 128, 128, 200)
);
}
}
if (_enabled)
{
drawText(xx + BUTTON_HEIGHT
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, _text
, isHot(id) ? imguiRGBA(255, 196, 0, 255) : imguiRGBA(255, 255, 255, 200)
);
}
else
{
drawText(xx + BUTTON_HEIGHT
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, _text
, imguiRGBA(128, 128, 128, 200)
);
}
return res;
}
bool collapse(const char* _text, const char* _subtext, bool _checked, bool _enabled)
{
m_widgetId++;
uint32_t id = (m_areaId << 16) | m_widgetId;
int32_t xx = m_widgetX;
int32_t yy = m_widgetY;
int32_t width = m_widgetW;
int32_t height = BUTTON_HEIGHT;
m_widgetY += BUTTON_HEIGHT + DEFAULT_SPACING;
const int32_t cx = xx + BUTTON_HEIGHT / 2 - CHECK_SIZE / 2;
const int32_t cy = yy + BUTTON_HEIGHT / 2 - CHECK_SIZE / 2;
bool over = _enabled && inRect(xx, yy, width, height);
bool res = buttonLogic(id, over);
if (_checked)
{
drawTriangle(cx
, cy
, CHECK_SIZE
, CHECK_SIZE
, 2
, imguiRGBA(255, 255, 255, isActive(id) ? 255 : 200)
);
}
else
{
drawTriangle(cx
, cy
, CHECK_SIZE
, CHECK_SIZE
, 1
, imguiRGBA(255, 255, 255, isActive(id) ? 255 : 200)
);
}
if (_enabled)
{
drawText(xx + BUTTON_HEIGHT
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, _text
, isHot(id) ? imguiRGBA(255, 196, 0, 255) : imguiRGBA(255, 255, 255, 200)
);
}
else
{
drawText(xx + BUTTON_HEIGHT
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, _text
, imguiRGBA(128, 128, 128, 200)
);
}
if (_subtext)
{
drawText(xx + width - BUTTON_HEIGHT / 2
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Right
, _subtext
, imguiRGBA(255, 255, 255, 128)
);
}
return res;
}
void labelVargs(const char* _format, va_list _argList)
{
char temp[8192];
char* out = temp;
int32_t len = bx::vsnprintf(out, sizeof(temp), _format, _argList);
if ( (int32_t)sizeof(temp) < len)
{
out = (char*)alloca(len+1);
len = bx::vsnprintf(out, len, _format, _argList);
}
out[len] = '\0';
int32_t xx = m_widgetX;
int32_t yy = m_widgetY;
m_widgetY += BUTTON_HEIGHT;
drawText(xx
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, out
, imguiRGBA(255, 255, 255, 255)
);
}
void value(const char* _text)
{
const int32_t xx = m_widgetX;
const int32_t yy = m_widgetY;
const int32_t ww = m_widgetW;
m_widgetY += BUTTON_HEIGHT;
drawText(xx + ww - BUTTON_HEIGHT / 2
, yy + BUTTON_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Right
, _text
, imguiRGBA(255, 255, 255, 200)
);
}
bool slider(const char* _text, float* _val, float _vmin, float _vmax, float _vinc, bool _enabled)
{
m_widgetId++;
uint32_t id = (m_areaId << 16) | m_widgetId;
int32_t xx = m_widgetX;
int32_t yy = m_widgetY;
int32_t width = m_widgetW;
int32_t height = SLIDER_HEIGHT;
m_widgetY += SLIDER_HEIGHT + DEFAULT_SPACING;
drawRoundedRect( (float)xx, (float)yy, (float)width, (float)height, 4.0f, imguiRGBA(0, 0, 0, 128) );
const int32_t range = width - SLIDER_MARKER_WIDTH;
float uu = (*_val - _vmin) / (_vmax - _vmin);
if (uu < 0)
{
uu = 0;
}
if (uu > 1)
{
uu = 1;
}
int32_t m = (int)(uu * range);
bool over = _enabled && inRect(xx + m, yy, SLIDER_MARKER_WIDTH, SLIDER_HEIGHT);
bool res = buttonLogic(id, over);
bool valChanged = false;
if (isActive(id) )
{
if (m_wentActive)
{
m_dragX = m_mx;
m_dragOrig = uu;
}
if (m_dragX != m_mx)
{
uu = m_dragOrig + (float)(m_mx - m_dragX) / (float)range;
if (uu < 0)
{
uu = 0;
}
if (uu > 1)
{
uu = 1;
}
*_val = _vmin + uu * (_vmax - _vmin);
*_val = floorf(*_val / _vinc + 0.5f) * _vinc; // Snap to vinc
m = (int)(uu * range);
valChanged = true;
}
}
if (isActive(id) )
{
drawRoundedRect( (float)(xx + m)
, (float)yy
, (float)SLIDER_MARKER_WIDTH
, (float)SLIDER_HEIGHT
, 4.0f
, imguiRGBA(255, 255, 255, 255)
);
}
else
{
drawRoundedRect( (float)(xx + m)
, (float)yy
, (float)SLIDER_MARKER_WIDTH
, (float)SLIDER_HEIGHT
, 4.0f
, isHot(id) ? imguiRGBA(255, 196, 0, 128) : imguiRGBA(255, 255, 255, 64)
);
}
// TODO: fix this, take a look at 'nicenum'.
int32_t digits = (int)(ceilf(log10f(_vinc) ) );
char fmt[16];
bx::snprintf(fmt, 16, "%%.%df", digits >= 0 ? 0 : -digits);
char msg[128];
bx::snprintf(msg, 128, fmt, *_val);
if (_enabled)
{
drawText(xx + SLIDER_HEIGHT / 2
, yy + SLIDER_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, _text
, isHot(id) ? imguiRGBA(255, 196, 0, 255) : imguiRGBA(255, 255, 255, 200)
);
drawText(xx + width - SLIDER_HEIGHT / 2
, yy + SLIDER_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Right
, msg
, isHot(id) ? imguiRGBA(255, 196, 0, 255) : imguiRGBA(255, 255, 255, 200)
);
}
else
{
drawText(xx + SLIDER_HEIGHT / 2
, yy + SLIDER_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Left
, _text
, imguiRGBA(128, 128, 128, 200)
);
drawText(xx + width - SLIDER_HEIGHT / 2
, yy + SLIDER_HEIGHT / 2 + TEXT_HEIGHT / 2
, ImguiTextAlign::Right
, msg
, imguiRGBA(128, 128, 128, 200)
);
}
return res || valChanged;
}
void indent()
{
m_widgetX += INDENT_SIZE;
m_widgetW -= INDENT_SIZE;
}
void unindent()
{
m_widgetX -= INDENT_SIZE;
m_widgetW += INDENT_SIZE;
}
void separator()
{
m_widgetY += DEFAULT_SPACING * 3;
}
void separatorLine()
{
int32_t xx = m_widgetX;
int32_t yy = m_widgetY;
int32_t width = m_widgetW;
int32_t height = 1;
m_widgetY += DEFAULT_SPACING * 4;
drawRect( (float)xx
, (float)yy
, (float)width
, (float)height
, imguiRGBA(255, 255, 255, 32)
);
}
void drawPolygon(const float* _coords, uint32_t _numCoords, float _r, uint32_t _abgr)
{
_numCoords = bx::uint32_min(_numCoords, MAX_TEMP_COORDS);
for (uint32_t ii = 0, jj = _numCoords - 1; ii < _numCoords; jj = ii++)
{
const float* v0 = &_coords[jj * 2];
const float* v1 = &_coords[ii * 2];
float dx = v1[0] - v0[0];
float dy = v1[1] - v0[1];
float d = sqrtf(dx * dx + dy * dy);
if (d > 0)
{
d = 1.0f / d;
dx *= d;
dy *= d;
}
m_tempNormals[jj * 2 + 0] = dy;
m_tempNormals[jj * 2 + 1] = -dx;
}
for (uint32_t ii = 0, jj = _numCoords - 1; ii < _numCoords; jj = ii++)
{
float dlx0 = m_tempNormals[jj * 2 + 0];
float dly0 = m_tempNormals[jj * 2 + 1];
float dlx1 = m_tempNormals[ii * 2 + 0];
float dly1 = m_tempNormals[ii * 2 + 1];
float dmx = (dlx0 + dlx1) * 0.5f;
float dmy = (dly0 + dly1) * 0.5f;
float dmr2 = dmx * dmx + dmy * dmy;
if (dmr2 > 0.000001f)
{
float scale = 1.0f / dmr2;
if (scale > 10.0f)
{
scale = 10.0f;
}
dmx *= scale;
dmy *= scale;
}
m_tempCoords[ii * 2 + 0] = _coords[ii * 2 + 0] + dmx * _r;
m_tempCoords[ii * 2 + 1] = _coords[ii * 2 + 1] + dmy * _r;
}
uint32_t numVertices = _numCoords*6 + (_numCoords-2)*3;
if (bgfx::checkAvailTransientVertexBuffer(numVertices, PosColorVertex::ms_decl) )
{
bgfx::TransientVertexBuffer tvb;
bgfx::allocTransientVertexBuffer(&tvb, numVertices, PosColorVertex::ms_decl);
uint32_t trans = _abgr&0xffffff;
PosColorVertex* vertex = (PosColorVertex*)tvb.data;
for (uint32_t ii = 0, jj = _numCoords-1; ii < _numCoords; jj = ii++)
{
vertex->m_x = _coords[ii*2+0];
vertex->m_y = _coords[ii*2+1];
vertex->m_abgr = _abgr;
++vertex;
vertex->m_x = _coords[jj*2+0];
vertex->m_y = _coords[jj*2+1];
vertex->m_abgr = _abgr;
++vertex;
vertex->m_x = m_tempCoords[jj*2+0];
vertex->m_y = m_tempCoords[jj*2+1];
vertex->m_abgr = trans;
++vertex;
vertex->m_x = m_tempCoords[jj*2+0];
vertex->m_y = m_tempCoords[jj*2+1];
vertex->m_abgr = trans;
++vertex;
vertex->m_x = m_tempCoords[ii*2+0];
vertex->m_y = m_tempCoords[ii*2+1];
vertex->m_abgr = trans;
++vertex;
vertex->m_x = _coords[ii*2+0];
vertex->m_y = _coords[ii*2+1];
vertex->m_abgr = _abgr;
++vertex;
}
for (uint32_t ii = 2; ii < _numCoords; ++ii)
{
vertex->m_x = _coords[0];
vertex->m_y = _coords[1];
vertex->m_abgr = _abgr;
++vertex;
vertex->m_x = _coords[(ii-1)*2+0];
vertex->m_y = _coords[(ii-1)*2+1];
vertex->m_abgr = _abgr;
++vertex;
vertex->m_x = _coords[ii*2+0];
vertex->m_y = _coords[ii*2+1];
vertex->m_abgr = _abgr;
++vertex;
}
bgfx::setVertexBuffer(&tvb);
bgfx::setState(0
| BGFX_STATE_RGB_WRITE
| BGFX_STATE_ALPHA_WRITE
| BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_SRC_ALPHA, BGFX_STATE_BLEND_INV_SRC_ALPHA)
);
bgfx::setProgram(m_colorProgram);
bgfx::setScissor(m_scissor);
bgfx::submit(m_view);
}
}
void drawRect(float _x, float _y, float w, float h, uint32_t _argb, float _fth = 1.0f)
{
float verts[4 * 2] =
{
_x + 0.5f, _y + 0.5f,
_x + w - 0.5f, _y + 0.5f,
_x + w - 0.5f, _y + h - 0.5f,
_x + 0.5f, _y + h - 0.5f,
};
drawPolygon(verts, 4, _fth, _argb);
}
void drawRoundedRect(float _x, float _y, float w, float h, float r, uint32_t _argb, float _fth = 1.0f)
{
const uint32_t num = NUM_CIRCLE_VERTS / 4;
const float* cverts = m_circleVerts;
float verts[(num + 1) * 4 * 2];
float* vv = verts;
for (uint32_t ii = 0; ii <= num; ++ii)
{
*vv++ = _x + w - r + cverts[ii * 2] * r;
*vv++ = _y + h - r + cverts[ii * 2 + 1] * r;
}
for (uint32_t ii = num; ii <= num * 2; ++ii)
{
*vv++ = _x + r + cverts[ii * 2] * r;
*vv++ = _y + h - r + cverts[ii * 2 + 1] * r;
}
for (uint32_t ii = num * 2; ii <= num * 3; ++ii)
{
*vv++ = _x + r + cverts[ii * 2] * r;
*vv++ = _y + r + cverts[ii * 2 + 1] * r;
}
for (uint32_t ii = num * 3; ii < num * 4; ++ii)
{
*vv++ = _x + w - r + cverts[ii * 2] * r;
*vv++ = _y + r + cverts[ii * 2 + 1] * r;
}
*vv++ = _x + w - r + cverts[0] * r;
*vv++ = _y + r + cverts[1] * r;
drawPolygon(verts, (num + 1) * 4, _fth, _argb);
}
void drawLine(float _x0, float _y0, float _x1, float _y1, float _r, uint32_t _abgr, float _fth = 1.0f)
{
float dx = _x1 - _x0;
float dy = _y1 - _y0;
float d = sqrtf(dx * dx + dy * dy);
if (d > 0.0001f)
{
d = 1.0f / d;
dx *= d;
dy *= d;
}
float nx = dy;
float ny = -dx;
float verts[4 * 2];
_r -= _fth;
_r *= 0.5f;
if (_r < 0.01f)
{
_r = 0.01f;
}
dx *= _r;
dy *= _r;
nx *= _r;
ny *= _r;
verts[0] = _x0 - dx - nx;
verts[1] = _y0 - dy - ny;
verts[2] = _x0 - dx + nx;
verts[3] = _y0 - dy + ny;
verts[4] = _x1 + dx + nx;
verts[5] = _y1 + dy + ny;
verts[6] = _x1 + dx - nx;
verts[7] = _y1 + dy - ny;
drawPolygon(verts, 4, _fth, _abgr);
}
void drawTriangle(int32_t _x, int32_t _y, int32_t _width, int32_t _height, int32_t _flags, uint32_t _abgr)
{
if (1 == _flags)
{
const float verts[3 * 2] =
{
(float)_x + 0.5f, (float)_y + 0.5f,
(float)_x + 0.5f + (float)_width * 1.0f, (float)_y + 0.5f + (float)_height / 2.0f - 0.5f,
(float)_x + 0.5f, (float)_y + 0.5f + (float)_height - 1.0f,
};
drawPolygon(verts, 3, 1.0f, _abgr);
}
else
{
const float verts[3 * 2] =
{
(float)_x + 0.5f, (float)_y + 0.5f + (float)_height - 1.0f,
(float)_x + 0.5f + (float)_width / 2.0f - 0.5f, (float)_y + 0.5f,
(float)_x + 0.5f + (float)_width - 1.0f, (float)_y + 0.5f + (float)_height - 1.0f,
};
drawPolygon(verts, 3, 1.0f, _abgr);
}
}
void getBakedQuad(stbtt_bakedchar* _chardata, int32_t char_index, float* _xpos, float* _ypos, stbtt_aligned_quad* _quad)
{
stbtt_bakedchar* b = _chardata + char_index;
int32_t round_x = STBTT_ifloor(*_xpos + b->xoff);
int32_t round_y = STBTT_ifloor(*_ypos + b->yoff);
_quad->x0 = (float)round_x;
_quad->y0 = (float)round_y;
_quad->x1 = (float)round_x + b->x1 - b->x0;
_quad->y1 = (float)round_y + b->y1 - b->y0;
_quad->s0 = (b->x0 + m_halfTexel) * m_invTextureWidth;
_quad->t0 = (b->y0 + m_halfTexel) * m_invTextureWidth;
_quad->s1 = (b->x1 + m_halfTexel) * m_invTextureHeight;
_quad->t1 = (b->y1 + m_halfTexel) * m_invTextureHeight;
*_xpos += b->xadvance;
}
float getTextLength(stbtt_bakedchar* _chardata, const char* _text, uint32_t& _numVertices)
{
float xpos = 0;
float len = 0;
uint32_t numVertices = 0;
while (*_text)
{
int32_t ch = (uint8_t)*_text;
if (ch == '\t')
{
for (int32_t ii = 0; ii < 4; ++ii)
{
if (xpos < s_tabStops[ii])
{
xpos = s_tabStops[ii];
break;
}
}
}
else if (ch >= ' '
&& ch < 128)
{
stbtt_bakedchar* b = _chardata + ch - ' ';
int32_t round_x = STBTT_ifloor( (xpos + b->xoff) + 0.5);
len = round_x + b->x1 - b->x0 + 0.5f;
xpos += b->xadvance;
numVertices += 6;
}
++_text;
}
_numVertices = numVertices;
return len;
}
void drawText(int32_t _x, int32_t _y, ImguiTextAlign::Enum _align, const char* _text, uint32_t _abgr)
{
drawText( (float)_x, (float)_y, _text, _align, _abgr);
}
void drawText(float _x, float _y, const char* _text, ImguiTextAlign::Enum _align, uint32_t _abgr)
{
if (!_text)
{
return;
}
uint32_t numVertices = 0;
if (_align == ImguiTextAlign::Center)
{
_x -= getTextLength(m_cdata, _text, numVertices) / 2;
}
else if (_align == ImguiTextAlign::Right)
{
_x -= getTextLength(m_cdata, _text, numVertices);
}
else // just count vertices
{
getTextLength(m_cdata, _text, numVertices);
}
if (bgfx::checkAvailTransientVertexBuffer(numVertices, PosColorUvVertex::ms_decl) )
{
bgfx::TransientVertexBuffer tvb;
bgfx::allocTransientVertexBuffer(&tvb, numVertices, PosColorUvVertex::ms_decl);
PosColorUvVertex* vertex = (PosColorUvVertex*)tvb.data;
const float ox = _x;
while (*_text)
{
int32_t ch = (uint8_t)*_text;
if (ch == '\t')
{
for (int32_t i = 0; i < 4; ++i)
{
if (_x < s_tabStops[i] + ox)
{
_x = s_tabStops[i] + ox;
break;
}
}
}
else if (ch >= ' '
&& ch < 128)
{
stbtt_aligned_quad quad;
getBakedQuad(m_cdata, ch - 32, &_x, &_y, &quad);
vertex->m_x = quad.x0;
vertex->m_y = quad.y0;
vertex->m_u = quad.s0;
vertex->m_v = quad.t0;
vertex->m_abgr = _abgr;
++vertex;
vertex->m_x = quad.x1;
vertex->m_y = quad.y1;
vertex->m_u = quad.s1;
vertex->m_v = quad.t1;
vertex->m_abgr = _abgr;
++vertex;
vertex->m_x = quad.x1;
vertex->m_y = quad.y0;
vertex->m_u = quad.s1;
vertex->m_v = quad.t0;
vertex->m_abgr = _abgr;
++vertex;
vertex->m_x = quad.x0;
vertex->m_y = quad.y0;
vertex->m_u = quad.s0;
vertex->m_v = quad.t0;
vertex->m_abgr = _abgr;
++vertex;
vertex->m_x = quad.x0;
vertex->m_y = quad.y1;
vertex->m_u = quad.s0;
vertex->m_v = quad.t1;
vertex->m_abgr = _abgr;
++vertex;
vertex->m_x = quad.x1;
vertex->m_y = quad.y1;
vertex->m_u = quad.s1;
vertex->m_v = quad.t1;
vertex->m_abgr = _abgr;
++vertex;
}
++_text;
}
bgfx::setTexture(0, u_texColor, m_fontTexture);
bgfx::setVertexBuffer(&tvb);
bgfx::setState(0
| BGFX_STATE_RGB_WRITE
| BGFX_STATE_ALPHA_WRITE
| BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_SRC_ALPHA, BGFX_STATE_BLEND_INV_SRC_ALPHA)
);
bgfx::setProgram(m_textureProgram);
bgfx::setScissor(m_scissor);
bgfx::submit(m_view);
}
}
/// Assumes _min < _max.
inline float clampf(float _val, float _min, float _max)
{
return ( _val > _max ? _max
: _val < _min ? _min
: _val
);
}
float sign(float px, float py, float ax, float ay, float bx, float by)
{
return (px - bx) * (ay - by) - (ax - bx) * (py - by);
}
bool pointInTriangle(float px, float py, float ax, float ay, float bx, float by, float cx, float cy)
{
const bool b1 = sign(px, py, ax, ay, bx, by) < 0.0f;
const bool b2 = sign(px, py, bx, by, cx, cy) < 0.0f;
const bool b3 = sign(px, py, cx, cy, ax, ay) < 0.0f;
return ((b1 == b2) && (b2 == b3));
}
void closestPointOnLine(float& ox, float &oy, float px, float py, float ax, float ay, float bx, float by)
{
float dx = px - ax;
float dy = py - ay;
float lx = bx - ax;
float ly = by - ay;
float len = sqrtf(lx*lx+ly*ly);
// Normalize.
float invLen = 1.0f/len;
lx*=invLen;
ly*=invLen;
float dot = (dx*lx + dy*ly);
if (dot < 0.0f)
{
ox = ax;
oy = ay;
}
else if (dot > len)
{
ox = bx;
oy = by;
}
else
{
ox = ax + lx*dot;
oy = ay + ly*dot;
}
}
void closestPointOnTriangle(float& ox, float &oy, float px, float py, float ax, float ay, float bx, float by, float cx, float cy)
{
float abx, aby;
float bcx, bcy;
float cax, cay;
closestPointOnLine(abx, aby, px, py, ax, ay, bx, by);
closestPointOnLine(bcx, bcy, px, py, bx, by, cx, cy);
closestPointOnLine(cax, cay, px, py, cx, cy, ax, ay);
const float pabx = px - abx;
const float paby = py - aby;
const float pbcx = px - bcx;
const float pbcy = py - bcy;
const float pcax = px - cax;
const float pcay = py - cay;
const float lab = sqrtf(pabx*pabx+paby*paby);
const float lbc = sqrtf(pbcx*pbcx+pbcy*pbcy);
const float lca = sqrtf(pcax*pcax+pcay*pcay);
const float m = bx::fmin(lab, bx::fmin(lbc, lca));
if (m == lab)
{
ox = abx;
oy = aby;
}
else if (m == lbc)
{
ox = bcx;
oy = bcy;
}
else// if (m == lca).
{
ox = cax;
oy = cay;
}
}
/// Reference: http://codeitdown.com/hsl-hsb-hsv-color/
void rgbToHsv(float _hsv[3], const float _rgb[3])
{
const float min = bx::fmin(_rgb[0], bx::fmin(_rgb[1], _rgb[2]));
const float max = bx::fmax(_rgb[0], bx::fmax(_rgb[1], _rgb[2]));
const float delta = max - min;
if (0.0f == delta)
{
_hsv[0] = 0.0f; // Achromatic.
}
else
{
if (max == _rgb[0])
{
_hsv[0] = (_rgb[1]-_rgb[2])/delta + (_rgb[1]<_rgb[2]?6.0f:0.0f); // Between yellow and magenta.
}
else if(max == _rgb[1])
{
_hsv[0] = (_rgb[2]-_rgb[0])/delta + 2.0f; // Between cyan and yellow.
}
else //if(max == _rgb[2]).
{
_hsv[0] = (_rgb[0]-_rgb[1])/delta + 4.0f; // Between magenta and cyan.
}
_hsv[0] /= 6.0f;
}
_hsv[1] = max == 0.0f ? 0.0f : delta/max;
_hsv[2] = max;
}
/// Reference: http://codeitdown.com/hsl-hsb-hsv-color/
void hsvToRgb(float _rgb[3], const float _hsv[3])
{
const int32_t ii = int32_t(_hsv[0]*6.0f);
const float ff = _hsv[0]*6.0f - float(ii);
const float vv = _hsv[2];
const float pp = vv * (1.0f - _hsv[1]);
const float qq = vv * (1.0f - _hsv[1]*ff);
const float tt = vv * (1.0f - _hsv[1]*(1.0f-ff));
switch (ii)
{
case 0: _rgb[0] = vv; _rgb[1] = tt; _rgb[2] = pp; break;
case 1: _rgb[0] = qq; _rgb[1] = vv; _rgb[2] = pp; break;
case 2: _rgb[0] = pp; _rgb[1] = vv; _rgb[2] = tt; break;
case 3: _rgb[0] = pp; _rgb[1] = qq; _rgb[2] = vv; break;
case 4: _rgb[0] = tt; _rgb[1] = pp; _rgb[2] = vv; break;
case 5: _rgb[0] = vv; _rgb[1] = pp; _rgb[2] = qq; break;
}
}
inline float vec2Dot(const float* __restrict _a, const float* __restrict _b)
{
return _a[0]*_b[0] + _a[1]*_b[1];
}
void barycentric(float& _u, float& _v, float& _w
, float _ax, float _ay
, float _bx, float _by
, float _cx, float _cy
, float _px, float _py
)
{
const float v0[2] = { _bx - _ax, _by - _ay };
const float v1[2] = { _cx - _ax, _cy - _ay };
const float v2[2] = { _px - _ax, _py - _ay };
const float d00 = vec2Dot(v0, v0);
const float d01 = vec2Dot(v0, v1);
const float d11 = vec2Dot(v1, v1);
const float d20 = vec2Dot(v2, v0);
const float d21 = vec2Dot(v2, v1);
const float denom = d00 * d11 - d01 * d01;
_v = (d11 * d20 - d01 * d21) / denom;
_w = (d00 * d21 - d01 * d20) / denom;
_u = 1.0f - _v - _w;
}
void colorWheelWidget(float _color[3], bool _respectIndentation, bool _enabled)
{
if (NULL == m_nvg)
{
return;
}
m_widgetId++;
const uint32_t wheelId = (m_areaId << 16) | m_widgetId;
m_widgetId++;
const uint32_t triangleId = (m_areaId << 16) | m_widgetId;
const int32_t height = m_scrollAreaWidth - COLOR_WHEEL_PADDING;
const float heightf = float(height);
const float widthf = float(m_scrollAreaWidth - COLOR_WHEEL_PADDING);
const float xx = float( (_respectIndentation ? m_widgetX-SCROLL_AREA_PADDING : m_scrollAreaX) + COLOR_WHEEL_PADDING/2);
const float yy = float(m_widgetY);
m_widgetY += height + DEFAULT_SPACING;
const float ro = (widthf < heightf ? widthf : heightf) * 0.5f - 5.0f; // radiusOuter.
const float rd = 20.0f; // radiusDelta.
const float ri = ro - rd; // radiusInner.
const float aeps = 0.5f / ro; // Half a pixel arc length in radians (2pi cancels out).
const float center[2] = { xx + widthf*0.5f, yy + heightf*0.5f };
const float cmx = float(m_mx) - center[0];
const float cmy = float(m_my) - center[1];
const float aa[2] = { ri - 6.0f, 0.0f }; // Hue point.
const float bb[2] = { cosf(-120.0f/180.0f*NVG_PI) * aa[0], sinf(-120.0f/180.0f*NVG_PI) * aa[0] }; // Black point.
const float cc[2] = { cosf( 120.0f/180.0f*NVG_PI) * aa[0], sinf( 120.0f/180.0f*NVG_PI) * aa[0] }; // White point.
const float ca[2] = { aa[0] - cc[0], aa[1] - cc[1] };
const float lenCa = sqrtf(ca[0]*ca[0]+ca[1]*ca[1]);
const float invLenCa = 1.0f/lenCa;
const float dirCa[2] = { ca[0]*invLenCa, ca[1]*invLenCa };
float sel[2];
float hsv[3];
rgbToHsv(hsv, _color);
if (_enabled)
{
if (m_leftPressed)
{
const float len = sqrtf(cmx*cmx+cmy*cmy);
if (len > ri)
{
if (len < ro)
{
setActive(wheelId);
}
}
else
{
setActive(triangleId);
}
}
if (m_leftReleased
&& (isActive(wheelId) || isActive(triangleId) ) )
{
clearActive();
}
// Set hue.
if (m_left && isActive(wheelId))
{
hsv[0] = atan2f(cmy, cmx)/NVG_PI*0.5f;
if (hsv[0] < 0.0f)
{
hsv[0]+=1.0f;
}
}
}
if (_enabled && m_left && isActive(triangleId))
{
float an = -hsv[0]*NVG_PI*2.0f;
float tmx = (cmx*cosf(an)-cmy*sinf(an));
float tmy = (cmx*sinf(an)+cmy*cosf(an));
if (pointInTriangle(tmx, tmy, aa[0], aa[1], bb[0], bb[1], cc[0], cc[1]))
{
sel[0] = tmx;
sel[1] = tmy;
}
else
{
closestPointOnTriangle(sel[0], sel[1], tmx, tmy, aa[0], aa[1], bb[0], bb[1], cc[0], cc[1]);
}
}
else
{
///
/// bb (black)
/// /\
/// / \
/// / \
/// / \
/// / \
/// / .sel \
/// / \
/// cc(white)/____.ss_______\aa (hue)
///
const float ss[2] =
{
cc[0] + dirCa[0]*lenCa*hsv[1],
cc[1] + dirCa[1]*lenCa*hsv[1],
};
const float sb[2] = { bb[0]-ss[0], bb[1]-ss[1] };
const float lenSb = sqrtf(sb[0]*sb[0]+sb[1]*sb[1]);
const float invLenSb = 1.0f/lenSb;
const float dirSb[2] = { sb[0]*invLenSb, sb[1]*invLenSb };
sel[0] = cc[0] + dirCa[0]*lenCa*hsv[1] + dirSb[0]*lenSb*(1.0f - hsv[2]);
sel[1] = cc[1] + dirCa[1]*lenCa*hsv[1] + dirSb[1]*lenSb*(1.0f - hsv[2]);
}
float uu, vv, ww;
barycentric(uu, vv, ww
, aa[0], aa[1]
, bb[0], bb[1]
, cc[0], cc[1]
, sel[0], sel[1]
);
const float val = clampf(1.0f-vv, 0.0001f, 1.0f);
const float sat = clampf(uu/val, 0.0001f, 1.0f);
const float out[3] = { hsv[0], sat, val };
hsvToRgb(_color, out);
// Draw widget.
nvgSave(m_nvg);
const float drawSaturation = _enabled ? 1.0f : 0.0f;
// Circle.
for (uint8_t ii = 0; ii < 6; ii++)
{
const float a0 = float(ii)/6.0f * 2.0f*NVG_PI - aeps;
const float a1 = float(ii+1.0f)/6.0f * 2.0f*NVG_PI + aeps;
nvgBeginPath(m_nvg);
nvgArc(m_nvg, center[0], center[1], ri, a0, a1, NVG_CW);
nvgArc(m_nvg, center[0], center[1], ro, a1, a0, NVG_CCW);
nvgClosePath(m_nvg);
const float ax = center[0] + cosf(a0) * (ri+ro)*0.5f;
const float ay = center[1] + sinf(a0) * (ri+ro)*0.5f;
const float bx = center[0] + cosf(a1) * (ri+ro)*0.5f;
const float by = center[1] + sinf(a1) * (ri+ro)*0.5f;
NVGpaint paint = nvgLinearGradient(m_nvg
, ax, ay
, bx, by
, nvgHSLA(a0/NVG_PI*0.5f,drawSaturation,0.55f,255)
, nvgHSLA(a1/NVG_PI*0.5f,drawSaturation,0.55f,255)
);
nvgFillPaint(m_nvg, paint);
nvgFill(m_nvg);
}
// Circle stroke.
nvgBeginPath(m_nvg);
nvgCircle(m_nvg, center[0], center[1], ri-0.5f);
nvgCircle(m_nvg, center[0], center[1], ro+0.5f);
nvgStrokeColor(m_nvg, nvgRGBA(0,0,0,64));
nvgStrokeWidth(m_nvg, 1.0f);
nvgStroke(m_nvg);
nvgSave(m_nvg);
{
// Hue selector.
nvgTranslate(m_nvg, center[0], center[1]);
nvgRotate(m_nvg, hsv[0]*NVG_PI*2.0f);
nvgStrokeWidth(m_nvg, 2.0f);
nvgBeginPath(m_nvg);
nvgRect(m_nvg, ri-1.0f,-3.0f,rd+2.0f,6.0f);
nvgStrokeColor(m_nvg, nvgRGBA(255,255,255,192));
nvgStroke(m_nvg);
// Hue selector drop shadow.
NVGpaint paint = nvgBoxGradient(m_nvg, ri-3.0f,-5.0f,ro-ri+6.0f,10.0f, 2.0f,4.0f, nvgRGBA(0,0,0,128), nvgRGBA(0,0,0,0));
nvgBeginPath(m_nvg);
nvgRect(m_nvg, ri-2.0f-10.0f,-4.0f-10.0f,ro-ri+4.0f+20.0f,8.0f+20.0f);
nvgRect(m_nvg, ri-2.0f,-4.0f,ro-ri+4.0f,8.0f);
nvgPathWinding(m_nvg, NVG_HOLE);
nvgFillPaint(m_nvg, paint);
nvgFill(m_nvg);
// Center triangle stroke.
nvgBeginPath(m_nvg);
nvgMoveTo(m_nvg, aa[0], aa[1]);
nvgLineTo(m_nvg, bb[0], bb[1]);
nvgLineTo(m_nvg, cc[0], cc[1]);
nvgClosePath(m_nvg);
nvgStrokeColor(m_nvg, nvgRGBA(0,0,0,64));
nvgStroke(m_nvg);
// Center triangle fill.
paint = nvgLinearGradient(m_nvg, aa[0], aa[1], bb[0], bb[1], nvgHSL(hsv[0],drawSaturation,0.5f), nvgRGBA(0,0,0,255));
nvgFillPaint(m_nvg, paint);
nvgFill(m_nvg);
paint = nvgLinearGradient(m_nvg, (aa[0]+bb[0])*0.5f, (aa[1]+bb[1])*0.5f, cc[0], cc[1], nvgRGBA(0,0,0,0), nvgRGBA(255,255,255,255));
nvgFillPaint(m_nvg, paint);
nvgFill(m_nvg);
// Color selector.
nvgStrokeWidth(m_nvg, 2.0f);
nvgBeginPath(m_nvg);
nvgCircle(m_nvg, sel[0], sel[1], 5);
nvgStrokeColor(m_nvg, nvgRGBA(255,255,255,192));
nvgStroke(m_nvg);
// Color selector stroke.
paint = nvgRadialGradient(m_nvg, sel[0], sel[1], 7.0f, 9.0f, nvgRGBA(0,0,0,64), nvgRGBA(0,0,0,0));
nvgBeginPath(m_nvg);
nvgRect(m_nvg, sel[0]-20.0f, sel[1]-20.0f, 40.0f, 40.0f);
nvgCircle(m_nvg, sel[0], sel[1], 7.0f);
nvgPathWinding(m_nvg, NVG_HOLE);
nvgFillPaint(m_nvg, paint);
nvgFill(m_nvg);
}
nvgRestore(m_nvg);
nvgRestore(m_nvg);
}
int32_t m_mx;
int32_t m_my;
int32_t m_scroll;
uint32_t m_active;
uint32_t m_hot;
uint32_t m_hotToBe;
int32_t m_dragX;
int32_t m_dragY;
float m_dragOrig;
int32_t m_widgetX;
int32_t m_widgetY;
int32_t m_widgetW;
bool m_left;
bool m_leftPressed;
bool m_leftReleased;
bool m_isHot;
bool m_isActive;
bool m_wentActive;
bool m_insideCurrentScroll;
uint32_t m_areaId;
uint32_t m_widgetId;
uint16_t m_scissor;
float m_tempCoords[MAX_TEMP_COORDS * 2];
float m_tempNormals[MAX_TEMP_COORDS * 2];
float m_circleVerts[NUM_CIRCLE_VERTS * 2];
int32_t m_scrollTop;
int32_t m_scrollBottom;
int32_t m_scrollRight;
int32_t m_scrollAreaTop;
int32_t m_scrollAreaWidth;
int32_t m_scrollAreaX;
int32_t* m_scrollVal;
int32_t m_focusTop;
int32_t m_focusBottom;
uint32_t m_scrollId;
bool m_insideScrollArea;
stbtt_bakedchar m_cdata[96]; // ASCII 32..126 is 95 glyphs
uint16_t m_textureWidth;
uint16_t m_textureHeight;
float m_invTextureWidth;
float m_invTextureHeight;
float m_halfTexel;
NVGcontext* m_nvg;
uint8_t m_view;
bgfx::UniformHandle u_texColor;
bgfx::TextureHandle m_fontTexture;
bgfx::ProgramHandle m_colorProgram;
bgfx::ProgramHandle m_textureProgram;
};
static Imgui s_imgui;
bool imguiCreate(const void* _data)
{
return s_imgui.create(_data);
}
void imguiDestroy()
{
s_imgui.destroy();
}
void imguiBeginFrame(int32_t _mx, int32_t _my, uint8_t _button, int32_t _scroll, uint16_t _width, uint16_t _height, uint8_t _view)
{
s_imgui.beginFrame(_mx, _my, _button, _scroll, _width, _height, _view);
}
void imguiEndFrame()
{
s_imgui.endFrame();
}
bool imguiBeginScrollArea(const char* _name, int32_t _x, int32_t _y, int32_t _width, int32_t _height, int32_t* _scroll)
{
return s_imgui.beginScrollArea(_name, _x, _y, _width, _height, _scroll);
}
void imguiEndScrollArea()
{
return s_imgui.endScrollArea();
}
void imguiIndent()
{
s_imgui.indent();
}
void imguiUnindent()
{
s_imgui.unindent();
}
void imguiSeparator()
{
s_imgui.separator();
}
void imguiSeparatorLine()
{
s_imgui.separatorLine();
}
bool imguiButton(const char* _text, bool _enabled)
{
return s_imgui.button(_text, _enabled);
}
bool imguiItem(const char* _text, bool _enabled)
{
return s_imgui.item(_text, _enabled);
}
bool imguiCheck(const char* _text, bool _checked, bool _enabled)
{
return s_imgui.check(_text, _checked, _enabled);
}
bool imguiCollapse(const char* _text, const char* _subtext, bool _checked, bool _enabled)
{
return s_imgui.collapse(_text, _subtext, _checked, _enabled);
}
void imguiLabel(const char* _format, ...)
{
va_list argList;
va_start(argList, _format);
s_imgui.labelVargs(_format, argList);
va_end(argList);
}
void imguiValue(const char* _text)
{
s_imgui.value(_text);
}
bool imguiSlider(const char* _text, float* _val, float _vmin, float _vmax, float _vinc, bool _enabled)
{
return s_imgui.slider(_text, _val, _vmin, _vmax, _vinc, _enabled);
}
bool imguiSlider(const char* _text, int32_t* _val, int32_t _vmin, int32_t _vmax, bool _enabled)
{
float val = (float)*_val;
bool result = s_imgui.slider(_text, &val, (float)_vmin, (float)_vmax, 1.0f, _enabled);
*_val = (int32_t)val;
return result;
}
uint32_t imguiChooseUseMacroInstead(uint32_t _selected, ...)
{
va_list argList;
va_start(argList, _selected);
const char* str = va_arg(argList, const char*);
for (uint32_t ii = 0; str != NULL; ++ii, str = va_arg(argList, const char*))
{
if (imguiCheck(str, ii == _selected) )
{
_selected = ii;
}
}
va_end(argList);
return _selected;
}
void imguiDrawText(int32_t _x, int32_t _y, ImguiTextAlign::Enum _align, const char* _text, uint32_t _argb)
{
s_imgui.drawText(_x, _y, _align, _text, _argb);
}
void imguiDrawLine(float _x0, float _y0, float _x1, float _y1, float _r, uint32_t _argb)
{
s_imgui.drawLine(_x0, _y0, _x1, _y1, _r, _argb);
}
void imguiDrawRoundedRect(float _x, float _y, float _width, float _height, float _r, uint32_t _argb)
{
s_imgui.drawRoundedRect(_x, _y, _width, _height, _r, _argb);
}
void imguiDrawRect(float _x, float _y, float _width, float _height, uint32_t _argb)
{
s_imgui.drawRect(_x, _y, _width, _height, _argb);
}
int imguiReserve(int _y)
{
const int yy = s_imgui.m_widgetY;
s_imgui.m_widgetY += _y;
return yy;
}
void imguiColorWheel(float _color[3], bool _respectIndentation, bool _enabled)
{
s_imgui.colorWheelWidget(_color, _respectIndentation, _enabled);
}
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