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bgfx/examples/common/font/text_buffer_manager.cpp

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/*
* Copyright 2013 Jeremie Roy. All rights reserved.
* License: http://www.opensource.org/licenses/BSD-2-Clause
*/
#include "../common.h"
#include <bgfx.h>
#include <stddef.h> // offsetof
#include <memory.h> // memcpy
#include <wchar.h> // wcslen
#include "text_buffer_manager.h"
#include "utf8.h"
#include "../cube_atlas.h"
#include "vs_font_basic.bin.h"
#include "fs_font_basic.bin.h"
#include "vs_font_distance_field.bin.h"
#include "fs_font_distance_field.bin.h"
#include "vs_font_distance_field_subpixel.bin.h"
#include "fs_font_distance_field_subpixel.bin.h"
#define MAX_TEXT_BUFFER_COUNT 64
#define MAX_BUFFERED_CHARACTERS 8192
class TextBuffer
{
public:
/// TextBuffer is bound to a fontManager for glyph retrieval
/// @remark the ownership of the manager is not taken
TextBuffer(FontManager* _fontManager);
~TextBuffer();
void setStyle(uint32_t _flags = STYLE_NORMAL)
{
m_styleFlags = _flags;
}
void setTextColor(uint32_t _rgba = 0x000000FF)
{
m_textColor = toABGR(_rgba);
}
void setBackgroundColor(uint32_t _rgba = 0x000000FF)
{
m_backgroundColor = toABGR(_rgba);
}
void setOverlineColor(uint32_t _rgba = 0x000000FF)
{
m_overlineColor = toABGR(_rgba);
}
void setUnderlineColor(uint32_t _rgba = 0x000000FF)
{
m_underlineColor = toABGR(_rgba);
}
void setStrikeThroughColor(uint32_t _rgba = 0x000000FF)
{
m_strikeThroughColor = toABGR(_rgba);
}
void setPenPosition(float _x, float _y)
{
m_penX = _x; m_penY = _y;
}
/// return the size of the text
//Rectangle measureText(FontHandle _fontHandle, const char * _string);
//Rectangle measureText(FontHandle _fontHandle, const wchar_t * _string);
/// append an ASCII/utf-8 string to the buffer using current pen position and color
void appendText(FontHandle _fontHandle, const char* _string);
/// append a wide char unicode string to the buffer using current pen position and color
void appendText(FontHandle _fontHandle, const wchar_t* _string);
/// append a whole face of the atlas cube, mostly used for debugging and visualizing atlas
void appendAtlasFace(uint16_t _faceIndex);
/// Clear the text buffer and reset its state (pen/color)
void clearTextBuffer();
/// get pointer to the vertex buffer to submit it to the graphic card
const uint8_t* getVertexBuffer()
{
return (uint8_t*) m_vertexBuffer;
}
/// number of vertex in the vertex buffer
uint32_t getVertexCount()
{
return m_vertexCount;
}
/// size in bytes of a vertex
uint32_t getVertexSize()
{
return sizeof(TextVertex);
}
/// get a pointer to the index buffer to submit it to the graphic
const uint16_t* getIndexBuffer()
{
return m_indexBuffer;
}
/// number of index in the index buffer
uint32_t getIndexCount()
{
return m_indexCount;
}
/// size in bytes of an index
uint32_t getIndexSize()
{
return sizeof(uint16_t);
}
uint32_t getTextColor()
{
return toABGR(m_textColor);
}
TextRectangle getRectangle() const
{
return m_rectangle;
}
private:
void appendGlyph(CodePoint _codePoint, const FontInfo& _font, const GlyphInfo& _glyphInfo);
void verticalCenterLastLine(float _txtDecalY, float _top, float _bottom);
uint32_t toABGR(uint32_t _rgba)
{
return ( ( (_rgba >> 0) & 0xff) << 24) |
( ( (_rgba >> 8) & 0xff) << 16) |
( ( (_rgba >> 16) & 0xff) << 8) |
( ( (_rgba >> 24) & 0xff) << 0);
}
uint32_t m_styleFlags;
// color states
uint32_t m_textColor;
uint32_t m_backgroundColor;
uint32_t m_overlineColor;
uint32_t m_underlineColor;
uint32_t m_strikeThroughColor;
//position states
float m_penX;
float m_penY;
float m_originX;
float m_originY;
float m_lineAscender;
float m_lineDescender;
float m_lineGap;
TextRectangle m_rectangle;
///
FontManager* m_fontManager;
void setVertex(uint32_t _i, float _x, float _y, uint32_t _rgba, uint8_t _style = STYLE_NORMAL)
{
m_vertexBuffer[_i].x = _x;
m_vertexBuffer[_i].y = _y;
m_vertexBuffer[_i].rgba = _rgba;
m_styleBuffer[_i] = _style;
}
struct TextVertex
{
float x, y;
int16_t u, v, w, t;
uint32_t rgba;
};
TextVertex* m_vertexBuffer;
uint16_t* m_indexBuffer;
uint8_t* m_styleBuffer;
uint32_t m_vertexCount;
uint32_t m_indexCount;
uint32_t m_lineStartIndex;
};
TextBuffer::TextBuffer(FontManager* _fontManager)
: m_styleFlags(STYLE_NORMAL)
, m_textColor(0xffffffff)
, m_backgroundColor(0xffffffff)
, m_overlineColor(0xffffffff)
, m_underlineColor(0xffffffff)
, m_strikeThroughColor(0xffffffff)
, m_penX(0)
, m_penY(0)
, m_originX(0)
, m_originY(0)
, m_lineAscender(0)
, m_lineDescender(0)
, m_lineGap(0)
, m_fontManager(_fontManager)
, m_vertexBuffer(new TextVertex[MAX_BUFFERED_CHARACTERS * 4])
, m_indexBuffer(new uint16_t[MAX_BUFFERED_CHARACTERS * 6])
, m_styleBuffer(new uint8_t[MAX_BUFFERED_CHARACTERS * 4])
, m_vertexCount(0)
, m_indexCount(0)
, m_lineStartIndex(0)
{
m_rectangle.width = 0;
m_rectangle.height = 0;
}
TextBuffer::~TextBuffer()
{
delete[] m_vertexBuffer;
delete[] m_indexBuffer;
}
void TextBuffer::appendText(FontHandle _fontHandle, const char* _string)
{
GlyphInfo glyph;
const FontInfo& font = m_fontManager->getFontInfo(_fontHandle);
if (m_vertexCount == 0)
{
m_originX = m_penX;
m_originY = m_penY;
m_lineDescender = 0; // font.m_descender;
m_lineAscender = 0; //font.m_ascender;
}
CodePoint codepoint = 0;
uint32_t state = 0;
for (; *_string; ++_string)
{
if (!utf8_decode(&state, (uint32_t*)&codepoint, *_string) )
{
if (m_fontManager->getGlyphInfo(_fontHandle, codepoint, glyph) )
{
appendGlyph(codepoint, font, glyph);
}
else
{
BX_CHECK(false, "Glyph not found");
}
}
}
if (state != UTF8_ACCEPT)
{
BX_CHECK(false, "The string is not well-formed");
}
}
void TextBuffer::appendText(FontHandle _fontHandle, const wchar_t* _string)
{
GlyphInfo glyph;
const FontInfo& font = m_fontManager->getFontInfo(_fontHandle);
if (m_vertexCount == 0)
{
m_originX = m_penX;
m_originY = m_penY;
m_lineDescender = 0; // font.m_descender;
m_lineAscender = 0; //font.m_ascender;
m_lineGap = 0;
}
for (uint32_t ii = 0, end = wcslen(_string); ii < end; ++ii)
{
uint32_t _codePoint = _string[ii];
if (m_fontManager->getGlyphInfo(_fontHandle, _codePoint, glyph) )
{
appendGlyph(_codePoint, font, glyph);
}
else
{
BX_CHECK(false, "Glyph not found");
}
}
}
void TextBuffer::appendAtlasFace(uint16_t _faceIndex)
{
float x0 = m_penX;
float y0 = m_penY;
float x1 = x0 + (float)m_fontManager->getAtlas()->getTextureSize();
float y1 = y0 + (float)m_fontManager->getAtlas()->getTextureSize();
m_fontManager->getAtlas()->packFaceLayerUV(_faceIndex, (uint8_t*)m_vertexBuffer, sizeof(TextVertex) * m_vertexCount + offsetof(TextVertex, u), sizeof(TextVertex) );
setVertex(m_vertexCount + 0, x0, y0, m_backgroundColor);
setVertex(m_vertexCount + 1, x0, y1, m_backgroundColor);
setVertex(m_vertexCount + 2, x1, y1, m_backgroundColor);
setVertex(m_vertexCount + 3, x1, y0, m_backgroundColor);
m_indexBuffer[m_indexCount + 0] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 1] = m_vertexCount + 1;
m_indexBuffer[m_indexCount + 2] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 3] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 4] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 5] = m_vertexCount + 3;
m_vertexCount += 4;
m_indexCount += 6;
}
void TextBuffer::clearTextBuffer()
{
m_vertexCount = 0;
m_indexCount = 0;
m_lineStartIndex = 0;
m_lineAscender = 0;
m_lineDescender = 0;
m_rectangle.width = 0;
m_rectangle.height = 0;
}
void TextBuffer::appendGlyph(CodePoint _codePoint, const FontInfo& _font, const GlyphInfo& _glyphInfo)
{
if (_codePoint == L'\n')
{
m_penX = m_originX;
m_penY -= m_lineDescender;
m_penY += m_lineGap;
m_lineDescender = 0;
m_lineAscender = 0;
m_lineStartIndex = m_vertexCount;
return;
}
if (_font.ascender > m_lineAscender
|| (_font.descender < m_lineDescender) )
{
if (_font.descender < m_lineDescender)
{
m_lineDescender = _font.descender;
m_lineGap = _font.lineGap;
}
float txtDecals = (_font.ascender - m_lineAscender);
m_lineAscender = _font.ascender;
m_lineGap = _font.lineGap;
m_penY += txtDecals;
verticalCenterLastLine( (txtDecals), (m_penY - m_lineAscender), (m_penY - m_lineDescender + m_lineGap) );
}
float kerning = 0;
m_penX += kerning * _font.scale;
GlyphInfo& blackGlyph = m_fontManager->getBlackGlyph();
if (m_styleFlags & STYLE_BACKGROUND
&& m_backgroundColor & 0xFF000000)
{
float x0 = (m_penX - kerning);
float y0 = (m_penY - m_lineAscender);
float x1 = ( (float)x0 + (_glyphInfo.advance_x) );
float y1 = (m_penY - m_lineDescender + m_lineGap);
m_fontManager->getAtlas()->packUV(blackGlyph.regionIndex, (uint8_t*)m_vertexBuffer, sizeof(TextVertex) * m_vertexCount + offsetof(TextVertex, u), sizeof(TextVertex) );
setVertex(m_vertexCount + 0, x0, y0, m_backgroundColor, STYLE_BACKGROUND);
setVertex(m_vertexCount + 1, x0, y1, m_backgroundColor, STYLE_BACKGROUND);
setVertex(m_vertexCount + 2, x1, y1, m_backgroundColor, STYLE_BACKGROUND);
setVertex(m_vertexCount + 3, x1, y0, m_backgroundColor, STYLE_BACKGROUND);
m_indexBuffer[m_indexCount + 0] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 1] = m_vertexCount + 1;
m_indexBuffer[m_indexCount + 2] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 3] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 4] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 5] = m_vertexCount + 3;
m_vertexCount += 4;
m_indexCount += 6;
}
if (m_styleFlags & STYLE_UNDERLINE
&& m_underlineColor & 0xFF000000)
{
float x0 = (m_penX - kerning);
float y0 = (m_penY - m_lineDescender / 2);
float x1 = ( (float)x0 + (_glyphInfo.advance_x) );
float y1 = y0 + _font.underlineThickness;
m_fontManager->getAtlas()->packUV(blackGlyph.regionIndex, (uint8_t*)m_vertexBuffer, sizeof(TextVertex) * m_vertexCount + offsetof(TextVertex, u), sizeof(TextVertex) );
setVertex(m_vertexCount + 0, x0, y0, m_underlineColor, STYLE_UNDERLINE);
setVertex(m_vertexCount + 1, x0, y1, m_underlineColor, STYLE_UNDERLINE);
setVertex(m_vertexCount + 2, x1, y1, m_underlineColor, STYLE_UNDERLINE);
setVertex(m_vertexCount + 3, x1, y0, m_underlineColor, STYLE_UNDERLINE);
m_indexBuffer[m_indexCount + 0] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 1] = m_vertexCount + 1;
m_indexBuffer[m_indexCount + 2] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 3] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 4] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 5] = m_vertexCount + 3;
m_vertexCount += 4;
m_indexCount += 6;
}
if (m_styleFlags & STYLE_OVERLINE
&& m_overlineColor & 0xFF000000)
{
float x0 = (m_penX - kerning);
float y0 = (m_penY - _font.ascender);
float x1 = ( (float)x0 + (_glyphInfo.advance_x) );
float y1 = y0 + _font.underlineThickness;
m_fontManager->getAtlas()->packUV(blackGlyph.regionIndex, (uint8_t*)m_vertexBuffer, sizeof(TextVertex) * m_vertexCount + offsetof(TextVertex, u), sizeof(TextVertex) );
setVertex(m_vertexCount + 0, x0, y0, m_overlineColor, STYLE_OVERLINE);
setVertex(m_vertexCount + 1, x0, y1, m_overlineColor, STYLE_OVERLINE);
setVertex(m_vertexCount + 2, x1, y1, m_overlineColor, STYLE_OVERLINE);
setVertex(m_vertexCount + 3, x1, y0, m_overlineColor, STYLE_OVERLINE);
m_indexBuffer[m_indexCount + 0] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 1] = m_vertexCount + 1;
m_indexBuffer[m_indexCount + 2] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 3] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 4] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 5] = m_vertexCount + 3;
m_vertexCount += 4;
m_indexCount += 6;
}
if (m_styleFlags & STYLE_STRIKE_THROUGH
&& m_strikeThroughColor & 0xFF000000)
{
float x0 = (m_penX - kerning);
float y0 = (m_penY - _font.ascender / 3);
float x1 = ( (float)x0 + (_glyphInfo.advance_x) );
float y1 = y0 + _font.underlineThickness;
m_fontManager->getAtlas()->packUV(blackGlyph.regionIndex, (uint8_t*)m_vertexBuffer, sizeof(TextVertex) * m_vertexCount + offsetof(TextVertex, u), sizeof(TextVertex) );
setVertex(m_vertexCount + 0, x0, y0, m_strikeThroughColor, STYLE_STRIKE_THROUGH);
setVertex(m_vertexCount + 1, x0, y1, m_strikeThroughColor, STYLE_STRIKE_THROUGH);
setVertex(m_vertexCount + 2, x1, y1, m_strikeThroughColor, STYLE_STRIKE_THROUGH);
setVertex(m_vertexCount + 3, x1, y0, m_strikeThroughColor, STYLE_STRIKE_THROUGH);
m_indexBuffer[m_indexCount + 0] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 1] = m_vertexCount + 1;
m_indexBuffer[m_indexCount + 2] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 3] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 4] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 5] = m_vertexCount + 3;
m_vertexCount += 4;
m_indexCount += 6;
}
float x0_precise = m_penX + (_glyphInfo.offset_x);
float x0 = (x0_precise);
float y0 = (m_penY + (_glyphInfo.offset_y) );
float x1 = (x0 + _glyphInfo.width);
float y1 = (y0 + _glyphInfo.height);
m_fontManager->getAtlas()->packUV(_glyphInfo.regionIndex, (uint8_t*)m_vertexBuffer, sizeof(TextVertex) * m_vertexCount + offsetof(TextVertex, u), sizeof(TextVertex) );
setVertex(m_vertexCount + 0, x0, y0, m_textColor);
setVertex(m_vertexCount + 1, x0, y1, m_textColor);
setVertex(m_vertexCount + 2, x1, y1, m_textColor);
setVertex(m_vertexCount + 3, x1, y0, m_textColor);
m_indexBuffer[m_indexCount + 0] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 1] = m_vertexCount + 1;
m_indexBuffer[m_indexCount + 2] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 3] = m_vertexCount + 0;
m_indexBuffer[m_indexCount + 4] = m_vertexCount + 2;
m_indexBuffer[m_indexCount + 5] = m_vertexCount + 3;
m_vertexCount += 4;
m_indexCount += 6;
m_penX += _glyphInfo.advance_x;
if (m_penX > m_rectangle.width)
{
m_rectangle.width = m_penX;
}
if ( (m_penY - m_lineDescender) > m_rectangle.height)
{
m_rectangle.height = (m_penY - m_lineDescender);
}
}
void TextBuffer::verticalCenterLastLine(float _dy, float _top, float _bottom)
{
for (uint32_t ii = m_lineStartIndex; ii < m_vertexCount; ii += 4)
{
if (m_styleBuffer[ii] == STYLE_BACKGROUND)
{
m_vertexBuffer[ii + 0].y = _top;
m_vertexBuffer[ii + 1].y = _bottom;
m_vertexBuffer[ii + 2].y = _bottom;
m_vertexBuffer[ii + 3].y = _top;
}
else
{
m_vertexBuffer[ii + 0].y += _dy;
m_vertexBuffer[ii + 1].y += _dy;
m_vertexBuffer[ii + 2].y += _dy;
m_vertexBuffer[ii + 3].y += _dy;
}
}
}
TextBufferManager::TextBufferManager(FontManager* _fontManager)
: m_textBufferHandles(MAX_TEXT_BUFFER_COUNT)
, m_fontManager(_fontManager)
{
m_textBuffers = new BufferCache[MAX_TEXT_BUFFER_COUNT];
const bgfx::Memory* vs_font_basic;
const bgfx::Memory* fs_font_basic;
const bgfx::Memory* vs_font_distance_field;
const bgfx::Memory* fs_font_distance_field;
const bgfx::Memory* vs_font_distance_field_subpixel;
const bgfx::Memory* fs_font_distance_field_subpixel;
switch (bgfx::getRendererType() )
{
case bgfx::RendererType::Direct3D9:
vs_font_basic = bgfx::makeRef(vs_font_basic_dx9, sizeof(vs_font_basic_dx9) );
fs_font_basic = bgfx::makeRef(fs_font_basic_dx9, sizeof(fs_font_basic_dx9) );
vs_font_distance_field = bgfx::makeRef(vs_font_distance_field_dx9, sizeof(vs_font_distance_field_dx9) );
fs_font_distance_field = bgfx::makeRef(fs_font_distance_field_dx9, sizeof(fs_font_distance_field_dx9) );
vs_font_distance_field_subpixel = bgfx::makeRef(vs_font_distance_field_subpixel_dx9, sizeof(vs_font_distance_field_subpixel_dx9) );
fs_font_distance_field_subpixel = bgfx::makeRef(fs_font_distance_field_subpixel_dx9, sizeof(fs_font_distance_field_subpixel_dx9) );
break;
case bgfx::RendererType::Direct3D11:
vs_font_basic = bgfx::makeRef(vs_font_basic_dx11, sizeof(vs_font_basic_dx11) );
fs_font_basic = bgfx::makeRef(fs_font_basic_dx11, sizeof(fs_font_basic_dx11) );
vs_font_distance_field = bgfx::makeRef(vs_font_distance_field_dx11, sizeof(vs_font_distance_field_dx11) );
fs_font_distance_field = bgfx::makeRef(fs_font_distance_field_dx11, sizeof(fs_font_distance_field_dx11) );
vs_font_distance_field_subpixel = bgfx::makeRef(vs_font_distance_field_subpixel_dx11, sizeof(vs_font_distance_field_subpixel_dx11) );
fs_font_distance_field_subpixel = bgfx::makeRef(fs_font_distance_field_subpixel_dx11, sizeof(fs_font_distance_field_subpixel_dx11) );
break;
default:
vs_font_basic = bgfx::makeRef(vs_font_basic_glsl, sizeof(vs_font_basic_glsl) );
fs_font_basic = bgfx::makeRef(fs_font_basic_glsl, sizeof(fs_font_basic_glsl) );
vs_font_distance_field = bgfx::makeRef(vs_font_distance_field_glsl, sizeof(vs_font_distance_field_glsl) );
fs_font_distance_field = bgfx::makeRef(fs_font_distance_field_glsl, sizeof(fs_font_distance_field_glsl) );
vs_font_distance_field_subpixel = bgfx::makeRef(vs_font_distance_field_subpixel_glsl, sizeof(vs_font_distance_field_subpixel_glsl) );
fs_font_distance_field_subpixel = bgfx::makeRef(fs_font_distance_field_subpixel_glsl, sizeof(fs_font_distance_field_subpixel_glsl) );
break;
}
bgfx::VertexShaderHandle vsh;
bgfx::FragmentShaderHandle fsh;
vsh = bgfx::createVertexShader(vs_font_basic);
fsh = bgfx::createFragmentShader(fs_font_basic);
m_basicProgram = bgfx::createProgram(vsh, fsh);
bgfx::destroyVertexShader(vsh);
bgfx::destroyFragmentShader(fsh);
vsh = bgfx::createVertexShader(vs_font_distance_field);
fsh = bgfx::createFragmentShader(fs_font_distance_field);
m_distanceProgram = bgfx::createProgram(vsh, fsh);
bgfx::destroyVertexShader(vsh);
bgfx::destroyFragmentShader(fsh);
vsh = bgfx::createVertexShader(vs_font_distance_field_subpixel);
fsh = bgfx::createFragmentShader(fs_font_distance_field_subpixel);
m_distanceSubpixelProgram = bgfx::createProgram(vsh, fsh);
bgfx::destroyVertexShader(vsh);
bgfx::destroyFragmentShader(fsh);
m_vertexDecl.begin();
m_vertexDecl.add(bgfx::Attrib::Position, 2, bgfx::AttribType::Float);
m_vertexDecl.add(bgfx::Attrib::TexCoord0, 4, bgfx::AttribType::Int16, true);
m_vertexDecl.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true);
m_vertexDecl.end();
u_texColor = bgfx::createUniform("u_texColor", bgfx::UniformType::Uniform1iv);
u_inverse_gamma = bgfx::createUniform("u_inverse_gamma", bgfx::UniformType::Uniform1f);
}
TextBufferManager::~TextBufferManager()
{
BX_CHECK(m_textBufferHandles.getNumHandles() == 0, "All the text buffers must be destroyed before destroying the manager");
delete[] m_textBuffers;
bgfx::destroyUniform(u_texColor);
bgfx::destroyUniform(u_inverse_gamma);
bgfx::destroyProgram(m_basicProgram);
bgfx::destroyProgram(m_distanceProgram);
bgfx::destroyProgram(m_distanceSubpixelProgram);
}
TextBufferHandle TextBufferManager::createTextBuffer(uint32_t _type, BufferType _bufferType)
{
uint16_t textIdx = m_textBufferHandles.alloc();
BufferCache& bc = m_textBuffers[textIdx];
bc.textBuffer = new TextBuffer(m_fontManager);
bc.fontType = _type;
bc.bufferType = _bufferType;
bc.indexBufferHandle = bgfx::invalidHandle;
bc.vertexBufferHandle = bgfx::invalidHandle;
TextBufferHandle ret = {textIdx};
return ret;
}
void TextBufferManager::destroyTextBuffer(TextBufferHandle _handle)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
m_textBufferHandles.free(_handle.idx);
delete bc.textBuffer;
bc.textBuffer = NULL;
if (bc.vertexBufferHandle == bgfx::invalidHandle)
{
return;
}
switch (bc.bufferType)
{
case STATIC:
{
bgfx::IndexBufferHandle ibh;
bgfx::VertexBufferHandle vbh;
ibh.idx = bc.indexBufferHandle;
vbh.idx = bc.vertexBufferHandle;
bgfx::destroyIndexBuffer(ibh);
bgfx::destroyVertexBuffer(vbh);
}
break;
case DYNAMIC:
bgfx::DynamicIndexBufferHandle ibh;
bgfx::DynamicVertexBufferHandle vbh;
ibh.idx = bc.indexBufferHandle;
vbh.idx = bc.vertexBufferHandle;
bgfx::destroyDynamicIndexBuffer(ibh);
bgfx::destroyDynamicVertexBuffer(vbh);
break;
case TRANSIENT: //naturally destroyed
break;
}
}
void TextBufferManager::submitTextBuffer(TextBufferHandle _handle, uint8_t _id, int32_t _depth)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
uint32_t indexSize = bc.textBuffer->getIndexCount() * bc.textBuffer->getIndexSize();
uint32_t vertexSize = bc.textBuffer->getVertexCount() * bc.textBuffer->getVertexSize();
const bgfx::Memory* mem;
bgfx::setTexture(0, u_texColor, m_fontManager->getAtlas()->getTextureHandle() );
float inverse_gamme = 1.0f / 2.2f;
bgfx::setUniform(u_inverse_gamma, &inverse_gamme);
switch (bc.fontType)
{
case FONT_TYPE_ALPHA:
bgfx::setProgram(m_basicProgram);
bgfx::setState(BGFX_STATE_RGB_WRITE | BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_SRC_ALPHA, BGFX_STATE_BLEND_INV_SRC_ALPHA) );
break;
case FONT_TYPE_DISTANCE:
bgfx::setProgram(m_distanceProgram);
bgfx::setState(BGFX_STATE_RGB_WRITE | BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_SRC_ALPHA, BGFX_STATE_BLEND_INV_SRC_ALPHA) );
break;
case FONT_TYPE_DISTANCE_SUBPIXEL:
bgfx::setProgram(m_distanceSubpixelProgram);
bgfx::setState(BGFX_STATE_RGB_WRITE | BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_FACTOR, BGFX_STATE_BLEND_INV_SRC_COLOR), bc.textBuffer->getTextColor() );
break;
}
switch (bc.bufferType)
{
case STATIC:
{
bgfx::IndexBufferHandle ibh;
bgfx::VertexBufferHandle vbh;
if (bc.vertexBufferHandle == bgfx::invalidHandle)
{
mem = bgfx::alloc(indexSize);
memcpy(mem->data, bc.textBuffer->getIndexBuffer(), indexSize);
ibh = bgfx::createIndexBuffer(mem);
mem = bgfx::alloc(vertexSize);
memcpy(mem->data, bc.textBuffer->getVertexBuffer(), vertexSize);
vbh = bgfx::createVertexBuffer(mem, m_vertexDecl);
bc.indexBufferHandle = ibh.idx;
bc.vertexBufferHandle = vbh.idx;
}
else
{
ibh.idx = bc.indexBufferHandle;
vbh.idx = bc.vertexBufferHandle;
}
bgfx::setVertexBuffer(vbh, bc.textBuffer->getVertexCount() );
bgfx::setIndexBuffer(ibh, bc.textBuffer->getIndexCount() );
} break;
case DYNAMIC:
{
bgfx::DynamicIndexBufferHandle ibh;
bgfx::DynamicVertexBufferHandle vbh;
if (bc.vertexBufferHandle == bgfx::invalidHandle)
{
mem = bgfx::alloc(indexSize);
memcpy(mem->data, bc.textBuffer->getIndexBuffer(), indexSize);
ibh = bgfx::createDynamicIndexBuffer(mem);
mem = bgfx::alloc(vertexSize);
memcpy(mem->data, bc.textBuffer->getVertexBuffer(), vertexSize);
vbh = bgfx::createDynamicVertexBuffer(mem, m_vertexDecl);
bc.indexBufferHandle = ibh.idx;
bc.vertexBufferHandle = vbh.idx;
}
else
{
ibh.idx = bc.indexBufferHandle;
vbh.idx = bc.vertexBufferHandle;
mem = bgfx::alloc(indexSize);
memcpy(mem->data, bc.textBuffer->getIndexBuffer(), indexSize);
bgfx::updateDynamicIndexBuffer(ibh, mem);
mem = bgfx::alloc(vertexSize);
memcpy(mem->data, bc.textBuffer->getVertexBuffer(), vertexSize);
bgfx::updateDynamicVertexBuffer(vbh, mem);
}
bgfx::setVertexBuffer(vbh, bc.textBuffer->getVertexCount() );
bgfx::setIndexBuffer(ibh, bc.textBuffer->getIndexCount() );
} break;
case TRANSIENT:
{
bgfx::TransientIndexBuffer tib;
bgfx::TransientVertexBuffer tvb;
bgfx::allocTransientIndexBuffer(&tib, bc.textBuffer->getIndexCount() );
bgfx::allocTransientVertexBuffer(&tvb, bc.textBuffer->getVertexCount(), m_vertexDecl);
memcpy(tib.data, bc.textBuffer->getIndexBuffer(), indexSize);
memcpy(tvb.data, bc.textBuffer->getVertexBuffer(), vertexSize);
bgfx::setVertexBuffer(&tvb, bc.textBuffer->getVertexCount() );
bgfx::setIndexBuffer(&tib, bc.textBuffer->getIndexCount() );
} break;
}
bgfx::submit(_id, _depth);
}
void TextBufferManager::setStyle(TextBufferHandle _handle, uint32_t _flags)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->setStyle(_flags);
}
void TextBufferManager::setTextColor(TextBufferHandle _handle, uint32_t _rgba)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->setTextColor(_rgba);
}
void TextBufferManager::setBackgroundColor(TextBufferHandle _handle, uint32_t _rgba)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->setBackgroundColor(_rgba);
}
void TextBufferManager::setOverlineColor(TextBufferHandle _handle, uint32_t _rgba)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->setOverlineColor(_rgba);
}
void TextBufferManager::setUnderlineColor(TextBufferHandle _handle, uint32_t _rgba)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->setUnderlineColor(_rgba);
}
void TextBufferManager::setStrikeThroughColor(TextBufferHandle _handle, uint32_t _rgba)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->setStrikeThroughColor(_rgba);
}
void TextBufferManager::setPenPosition(TextBufferHandle _handle, float _x, float _y)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->setPenPosition(_x, _y);
}
void TextBufferManager::appendText(TextBufferHandle _handle, FontHandle _fontHandle, const char* _string)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->appendText(_fontHandle, _string);
}
void TextBufferManager::appendText(TextBufferHandle _handle, FontHandle _fontHandle, const wchar_t* _string)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->appendText(_fontHandle, _string);
}
void TextBufferManager::appendAtlasFace(TextBufferHandle _handle, uint16_t _faceIndex)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->appendAtlasFace(_faceIndex);
}
void TextBufferManager::clearTextBuffer(TextBufferHandle _handle)
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
bc.textBuffer->clearTextBuffer();
}
TextRectangle TextBufferManager::measureText(FontHandle _fontHandle, const char* _string) const
{
GlyphInfo glyph;
const FontInfo& font = m_fontManager->getFontInfo(_fontHandle);
TextRectangle rect;
rect.width = 0;
rect.height = font.ascender - font.descender; //should I put lineGap here ?
CodePoint codepoint = 0;
uint32_t state = 0;
float w = 0;
for (; *_string; ++_string)
{
if (!utf8_decode(&state, (uint32_t*)&codepoint, *_string) )
{
if (m_fontManager->getGlyphInfo(_fontHandle, codepoint, glyph) )
{
if (codepoint == L'\n')
{
rect.height += font.lineGap + font.ascender - font.descender;
w=0;
break;
}
//TODO kerning
if((w + glyph.advance_x) > rect.width)
{
rect.width = w + glyph.advance_x;
}
}
else
{
BX_CHECK(false, "Glyph not found");
}
}
}
if (state != UTF8_ACCEPT)
{
BX_CHECK(false, "The string is not well-formed");
}
return rect;
}
TextRectangle TextBufferManager::measureText(FontHandle _fontHandle, const wchar_t* _string) const
{
GlyphInfo glyph;
const FontInfo& font = m_fontManager->getFontInfo(_fontHandle);
TextRectangle rect;
rect.width = 0;
rect.height = font.ascender - font.descender; //should I put lineGap here ?
float w = 0;
for (uint32_t ii = 0, end = wcslen(_string); ii < end; ++ii)
{
uint32_t codepoint = _string[ii];
if (m_fontManager->getGlyphInfo(_fontHandle, codepoint, glyph) )
{
if (codepoint == L'\n')
{
rect.height += font.lineGap + font.ascender - font.descender;
w=0;
break;
}
//TODO kerning
if((w + glyph.advance_x) > rect.width)
{
rect.width = w + glyph.advance_x;
}
}
else
{
BX_CHECK(false, "Glyph not found");
}
}
return rect;
}
TextRectangle TextBufferManager::getRectangle(TextBufferHandle _handle) const
{
BX_CHECK(bgfx::invalidHandle != _handle.idx, "Invalid handle used");
BufferCache& bc = m_textBuffers[_handle.idx];
return bc.textBuffer->getRectangle();
}
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