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metaforce/specter/lib/TextView.cpp

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#include "Specter/TextView.hpp"
#include "Specter/ViewResources.hpp"
#include "utf8proc.h"
#include <freetype/internal/internal.h>
#include <freetype/internal/ftobjs.h>
namespace Specter
{
static LogVisor::LogModule Log("Specter::TextView");
static const char* GLSLVS =
"#version 330\n"
"layout(location=0) in vec3 posIn[4];\n"
"layout(location=4) in mat4 mvMtx;\n"
"layout(location=8) in vec3 uvIn[4];\n"
"layout(location=12) in vec4 colorIn;\n"
SPECTER_VIEW_VERT_BLOCK_GLSL
"struct VertToFrag\n"
"{\n"
" vec3 uv;\n"
" vec4 color;\n"
"};\n"
"out VertToFrag vtf;\n"
"void main()\n"
"{\n"
" vtf.uv = uvIn[gl_VertexID];\n"
" vtf.color = colorIn * mulColor;\n"
" gl_Position = mv * mvMtx * vec4(posIn[gl_VertexID], 1.0);\n"
"}\n";
static const char* GLSLFSReg =
"#version 330\n"
"uniform sampler2DArray fontTex;\n"
"struct VertToFrag\n"
"{\n"
" vec3 uv;\n"
" vec4 color;\n"
"};\n"
"in VertToFrag vtf;\n"
"layout(location=0) out vec4 colorOut;\n"
"void main()\n"
"{\n"
" colorOut = vtf.color;\n"
" colorOut.a *= texture(fontTex, vtf.uv).r;\n"
"}\n";
static const char* GLSLFSSubpixel =
"#version 330\n"
"uniform sampler2DArray fontTex;\n"
"struct VertToFrag\n"
"{\n"
" vec3 uv;\n"
" vec4 color;\n"
"};\n"
"in VertToFrag vtf;\n"
"layout(location=0, index=0) out vec4 colorOut;\n"
"layout(location=0, index=1) out vec4 blendOut;\n"
"void main()\n"
"{\n"
" colorOut = vtf.color;\n"
" blendOut = colorOut.a * texture(fontTex, vtf.uv);\n"
"}\n";
void TextView::Resources::init(boo::GLDataFactory* factory, FontCache* fcache)
{
m_fcache = fcache;
static const char* BlockNames[] = {"SpecterViewBlock"};
m_regular =
factory->newShaderPipeline(GLSLVS, GLSLFSReg, 1, "fontTex", 1, BlockNames,
boo::BlendFactor::SrcAlpha, boo::BlendFactor::InvSrcAlpha,
false, false, false);
m_subpixel =
factory->newShaderPipeline(GLSLVS, GLSLFSSubpixel, 1, "fontTex", 1, BlockNames,
boo::BlendFactor::SrcColor1, boo::BlendFactor::InvSrcColor1,
false, false, false);
}
#if _WIN32
void TextView::Resources::init(boo::ID3DDataFactory* factory, FontCache* fcache)
{
m_fcache = fcache;
static const char* VS =
"struct VertData\n"
"{\n"
" float3 posIn[4] : POSITION;\n"
" float4x4 mvMtx : MODELVIEW;\n"
" float3 uvIn[4] : UV;\n"
" float4 colorIn : COLOR;\n"
"};\n"
SPECTER_VIEW_VERT_BLOCK_HLSL
"struct VertToFrag\n"
"{\n"
" float4 position : SV_Position;\n"
" float3 uv : UV;\n"
" float4 color : COLOR;\n"
"};\n"
"VertToFrag main(in VertData v, in uint vertId : SV_VertexID)\n"
"{\n"
" VertToFrag vtf;\n"
" vtf.uv = v.uvIn[vertId];\n"
" vtf.color = v.colorIn * mulColor;\n"
" vtf.position = mul(mv, mul(v.mvMtx, float4(v.posIn[vertId], 1.0)));\n"
" return vtf;\n"
"}\n";
static const char* FSReg =
"Texture2DArray fontTex : register(t0);\n"
"SamplerState samp : register(s0);\n"
"struct VertToFrag\n"
"{\n"
" float4 position : SV_Position;\n"
" float3 uv : UV;\n"
" float4 color : COLOR;\n"
"};\n"
"float4 main(in VertToFrag vtf) : SV_Target0\n"
"{\n"
" float4 colorOut = vtf.color;\n"
" colorOut.a *= fontTex.Sample(samp, vtf.uv).r;\n"
" return colorOut;\n"
"}\n";
static const char* FSSubpixel =
"Texture2DArray fontTex : register(t0);\n"
"SamplerState samp : register(s0);\n"
"struct VertToFrag\n"
"{\n"
" float4 position : SV_Position;\n"
" float3 uv : UV;\n"
" float4 color : COLOR;\n"
"};\n"
"struct BlendOut\n"
"{\n"
" float4 colorOut : SV_Target0;\n"
" float4 blendOut : SV_Target1;\n"
"};\n"
"BlendOut main(in VertToFrag vtf)\n"
"{\n"
" BlendOut ret;\n"
" ret.colorOut = vtf.color;\n"
" ret.blendOut = ret.colorOut.a * fontTex.Sample(samp, vtf.uv);\n"
" return ret;\n"
"}\n";
boo::VertexElementDescriptor vdescs[] =
{
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 0},
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 1},
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 2},
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 3},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 0},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 1},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 2},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 3},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 0},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 1},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 2},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 3},
{nullptr, nullptr, boo::VertexSemantic::Color | boo::VertexSemantic::Instanced}
};
m_vtxFmt = factory->newVertexFormat(13, vdescs);
ComPtr<ID3DBlob> blobVert;
ComPtr<ID3DBlob> blobFrag;
ComPtr<ID3DBlob> blobPipe;
m_regular =
factory->newShaderPipeline(VS, FSReg, blobVert, blobFrag, blobPipe, m_vtxFmt,
boo::BlendFactor::SrcAlpha, boo::BlendFactor::InvSrcAlpha,
false, false, false);
blobFrag.Reset();
blobPipe.Reset();
m_subpixel =
factory->newShaderPipeline(nullptr, FSSubpixel, blobVert, blobFrag, blobPipe, m_vtxFmt,
boo::BlendFactor::SrcColor1, boo::BlendFactor::InvSrcColor1,
false, false, false);
}
#endif
#if BOO_HAS_METAL
void TextView::Resources::init(boo::MetalDataFactory* factory, FontCache* fcache)
{
m_fcache = fcache;
static const char* VS =
"#include <metal_stdlib>\n"
"using namespace metal;\n"
"struct VertData\n"
"{\n"
" float3 posIn[4];\n"
" float4x4 mvMtx;\n"
" float3 uvIn[4];\n"
" float4 colorIn;\n"
"};\n"
SPECTER_VIEW_VERT_BLOCK_METAL
"struct VertToFrag\n"
"{\n"
" float4 position [[ position ]];\n"
" float3 uv;\n"
" float4 color;\n"
"};\n"
"vertex VertToFrag vmain(constant VertData* va [[ buffer(1) ]],\n"
" uint vertId [[ vertex_id ]], uint instId [[ instance_id ]],\n"
" constant SpecterViewBlock& view [[ buffer(2) ]])\n"
"{\n"
" VertToFrag vtf;\n"
" constant VertData& v = va[instId];\n"
" vtf.uv = v.uvIn[vertId];\n"
" vtf.color = v.colorIn * view.mulColor;\n"
" vtf.position = view.mv * v.mvMtx * float4(v.posIn[vertId], 1.0);\n"
" return vtf;\n"
"}\n";
static const char* FSReg =
"#include <metal_stdlib>\n"
"using namespace metal;\n"
"constexpr sampler samp(address::repeat);\n"
"struct VertToFrag\n"
"{\n"
" float4 position [[ position ]];\n"
" float3 uv;\n"
" float4 color;\n"
"};\n"
"fragment float4 fmain(VertToFrag vtf [[ stage_in ]], texture2d_array<float> fontTex [[ texture(0) ]])\n"
"{\n"
" float4 colorOut = vtf.color;\n"
" colorOut.a *= fontTex.sample(samp, vtf.uv.xy, vtf.uv.z).r;\n"
" return colorOut;\n"
"}\n";
boo::VertexElementDescriptor vdescs[] =
{
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 0},
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 1},
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 2},
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 3},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 0},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 1},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 2},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 3},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 0},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 1},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 2},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 3},
{nullptr, nullptr, boo::VertexSemantic::Color | boo::VertexSemantic::Instanced}
};
m_vtxFmt = factory->newVertexFormat(13, vdescs);
m_regular =
factory->newShaderPipeline(VS, FSReg, m_vtxFmt, 1,
boo::BlendFactor::SrcAlpha, boo::BlendFactor::InvSrcAlpha,
false, false, false);
}
#endif
#if BOO_HAS_VULKAN
void TextView::Resources::init(boo::VulkanDataFactory* factory, FontCache* fcache)
{
m_fcache = fcache;
boo::VertexElementDescriptor vdescs[] =
{
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 0},
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 1},
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 2},
{nullptr, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 3},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 0},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 1},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 2},
{nullptr, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 3},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 0},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 1},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 2},
{nullptr, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 3},
{nullptr, nullptr, boo::VertexSemantic::Color | boo::VertexSemantic::Instanced}
};
m_vtxFmt = factory->newVertexFormat(13, vdescs);
m_regular =
factory->newShaderPipeline(GLSLVS, GLSLFSReg, m_vtxFmt,
boo::BlendFactor::SrcAlpha, boo::BlendFactor::InvSrcAlpha,
false, false, false);
}
#endif
TextView::TextView(ViewResources& res, View& parentView, const FontAtlas& font, Alignment align, size_t capacity)
: View(res, parentView),
m_capacity(capacity),
m_fontAtlas(font),
m_align(align)
{
m_glyphBuf =
res.m_factory->newDynamicBuffer(boo::BufferUse::Vertex,
sizeof(RenderGlyph), capacity);
boo::IShaderPipeline* shader;
if (font.subpixel())
shader = res.m_textRes.m_subpixel;
else
shader = res.m_textRes.m_regular;
if (!res.m_textRes.m_vtxFmt)
{
boo::VertexElementDescriptor vdescs[] =
{
{m_glyphBuf, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 0},
{m_glyphBuf, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 1},
{m_glyphBuf, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 2},
{m_glyphBuf, nullptr, boo::VertexSemantic::Position4 | boo::VertexSemantic::Instanced, 3},
{m_glyphBuf, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 0},
{m_glyphBuf, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 1},
{m_glyphBuf, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 2},
{m_glyphBuf, nullptr, boo::VertexSemantic::ModelView | boo::VertexSemantic::Instanced, 3},
{m_glyphBuf, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 0},
{m_glyphBuf, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 1},
{m_glyphBuf, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 2},
{m_glyphBuf, nullptr, boo::VertexSemantic::UV4 | boo::VertexSemantic::Instanced, 3},
{m_glyphBuf, nullptr, boo::VertexSemantic::Color | boo::VertexSemantic::Instanced}
};
m_vtxFmt = res.m_factory->newVertexFormat(13, vdescs);
boo::ITexture* texs[] = {m_fontAtlas.texture()};
m_shaderBinding = res.m_factory->newShaderDataBinding(shader, m_vtxFmt,
nullptr, m_glyphBuf, nullptr, 1,
(boo::IGraphicsBuffer**)&m_viewVertBlockBuf,
1, texs);
}
else
{
boo::ITexture* texs[] = {m_fontAtlas.texture()};
m_shaderBinding = res.m_factory->newShaderDataBinding(shader, res.m_textRes.m_vtxFmt,
nullptr, m_glyphBuf, nullptr, 1,
(boo::IGraphicsBuffer**)&m_viewVertBlockBuf,
1, texs);
}
m_glyphs.reserve(capacity);
commitResources(res);
}
TextView::TextView(ViewResources& res, View& parentView, FontTag font, Alignment align, size_t capacity)
: TextView(res, parentView, res.m_textRes.m_fcache->lookupAtlas(font), align, capacity) {}
TextView::RenderGlyph::RenderGlyph(int& adv, const FontAtlas::Glyph& glyph, const Zeus::CColor& defaultColor)
{
m_pos[0].assign(adv + glyph.m_leftPadding, glyph.m_verticalOffset + glyph.m_height, 0.f);
m_pos[1].assign(adv + glyph.m_leftPadding, glyph.m_verticalOffset, 0.f);
m_pos[2].assign(adv + glyph.m_leftPadding + glyph.m_width, glyph.m_verticalOffset + glyph.m_height, 0.f);
m_pos[3].assign(adv + glyph.m_leftPadding + glyph.m_width, glyph.m_verticalOffset, 0.f);
m_uv[0].assign(glyph.m_uv[0], glyph.m_uv[1], glyph.m_layerFloat);
m_uv[1].assign(glyph.m_uv[0], glyph.m_uv[3], glyph.m_layerFloat);
m_uv[2].assign(glyph.m_uv[2], glyph.m_uv[1], glyph.m_layerFloat);
m_uv[3].assign(glyph.m_uv[2], glyph.m_uv[3], glyph.m_layerFloat);
m_color = defaultColor;
adv += glyph.m_advance;
}
int TextView::DoKern(FT_Pos val, const FontAtlas& atlas)
{
if (!val) return 0;
val = FT_MulFix(val, atlas.FT_Xscale());
FT_Pos orig_x = val;
/* we scale down kerning values for small ppem values */
/* to avoid that rounding makes them too big. */
/* `25' has been determined heuristically. */
if (atlas.FT_XPPem() < 25)
val = FT_MulDiv(orig_x, atlas.FT_XPPem(), 25);
return FT_PIX_ROUND(val) >> 6;
}
void TextView::typesetGlyphs(const std::string& str, const Zeus::CColor& defaultColor)
{
size_t rem = str.size();
const utf8proc_uint8_t* it = reinterpret_cast<const utf8proc_uint8_t*>(str.data());
uint32_t lCh = -1;
m_glyphs.clear();
m_glyphs.reserve(str.size());
m_glyphInfo.clear();
m_glyphInfo.reserve(str.size());
int adv = 0;
while (rem)
{
utf8proc_int32_t ch;
utf8proc_ssize_t sz = utf8proc_iterate(it, -1, &ch);
if (sz < 0)
Log.report(LogVisor::FatalError, "invalid UTF-8 char");
if (ch == '\n')
break;
const FontAtlas::Glyph* glyph = m_fontAtlas.lookupGlyph(ch);
if (!glyph)
{
rem -= sz;
it += sz;
continue;
}
if (lCh != -1)
adv += DoKern(m_fontAtlas.lookupKern(lCh, glyph->m_glyphIdx), m_fontAtlas);
m_glyphs.emplace_back(adv, *glyph, defaultColor);
m_glyphInfo.emplace_back(ch, glyph->m_width, glyph->m_height, adv);
lCh = glyph->m_glyphIdx;
rem -= sz;
it += sz;
if (m_glyphs.size() == m_capacity)
break;
}
if (m_align == Alignment::Right)
{
int adj = -adv;
for (RenderGlyph& g : m_glyphs)
{
g.m_pos[0][0] += adj;
g.m_pos[1][0] += adj;
g.m_pos[2][0] += adj;
g.m_pos[3][0] += adj;
}
}
else if (m_align == Alignment::Center)
{
int adj = -adv / 2;
for (RenderGlyph& g : m_glyphs)
{
g.m_pos[0][0] += adj;
g.m_pos[1][0] += adj;
g.m_pos[2][0] += adj;
g.m_pos[3][0] += adj;
}
}
m_width = adv;
m_valid = false;
updateSize();
}
void TextView::typesetGlyphs(const std::wstring& str, const Zeus::CColor& defaultColor)
{
uint32_t lCh = -1;
m_glyphs.clear();
m_glyphs.reserve(str.size());
m_glyphInfo.clear();
m_glyphInfo.reserve(str.size());
int adv = 0;
for (wchar_t ch : str)
{
if (ch == L'\n')
break;
const FontAtlas::Glyph* glyph = m_fontAtlas.lookupGlyph(ch);
if (!glyph)
continue;
if (lCh != -1)
adv += DoKern(m_fontAtlas.lookupKern(lCh, glyph->m_glyphIdx), m_fontAtlas);
m_glyphs.emplace_back(adv, *glyph, defaultColor);
m_glyphInfo.emplace_back(ch, glyph->m_width, glyph->m_height, adv);
lCh = glyph->m_glyphIdx;
if (m_glyphs.size() == m_capacity)
break;
}
if (m_align == Alignment::Right)
{
int adj = -adv;
for (RenderGlyph& g : m_glyphs)
{
g.m_pos[0][0] += adj;
g.m_pos[1][0] += adj;
g.m_pos[2][0] += adj;
g.m_pos[3][0] += adj;
}
}
else if (m_align == Alignment::Center)
{
int adj = -adv / 2;
for (RenderGlyph& g : m_glyphs)
{
g.m_pos[0][0] += adj;
g.m_pos[1][0] += adj;
g.m_pos[2][0] += adj;
g.m_pos[3][0] += adj;
}
}
m_width = adv;
m_valid = false;
updateSize();
}
void TextView::colorGlyphs(const Zeus::CColor& newColor)
{
for (RenderGlyph& glyph : m_glyphs)
glyph.m_color = newColor;
m_valid = false;
}
void TextView::colorGlyphsTypeOn(const Zeus::CColor& newColor, float startInterval, float fadeTime)
{
}
void TextView::think()
{
}
void TextView::resized(const boo::SWindowRect &root, const boo::SWindowRect& sub)
{
View::resized(root, sub);
}
void TextView::draw(boo::IGraphicsCommandQueue* gfxQ)
{
View::draw(gfxQ);
if (m_glyphs.size())
{
if (!m_valid)
{
m_glyphBuf->load(m_glyphs.data(), m_glyphs.size() * sizeof(RenderGlyph));
m_valid = true;
}
gfxQ->setShaderDataBinding(m_shaderBinding);
gfxQ->drawInstances(0, 4, m_glyphs.size());
}
}
std::pair<int,int> TextView::queryGlyphDimensions(size_t pos) const
{
if (pos >= m_glyphInfo.size())
Log.report(LogVisor::FatalError,
"TextView::queryGlyphWidth(%" PRISize ") out of bounds: %" PRISize,
pos, m_glyphInfo.size());
return m_glyphInfo[pos].m_dims;
}
size_t TextView::reverseSelectGlyph(int x) const
{
size_t ret = 0;
size_t idx = 1;
int minDelta = abs(x);
for (const RenderGlyphInfo& info : m_glyphInfo)
{
int thisDelta = abs(info.m_adv-x);
if (thisDelta < minDelta)
{
minDelta = thisDelta;
ret = idx;
}
++idx;
}
return ret;
}
int TextView::queryReverseAdvance(size_t idx) const
{
if (idx > m_glyphInfo.size())
Log.report(LogVisor::FatalError,
"TextView::queryReverseGlyph(%" PRISize ") out of inclusive bounds: %" PRISize,
idx, m_glyphInfo.size());
if (!idx) return 0;
return m_glyphInfo[idx-1].m_adv;
}
std::pair<size_t,size_t> TextView::queryWholeWordRange(size_t idx) const
{
if (idx > m_glyphInfo.size())
Log.report(LogVisor::FatalError,
"TextView::queryWholeWordRange(%" PRISize ") out of inclusive bounds: %" PRISize,
idx, m_glyphInfo.size());
if (m_glyphInfo.empty())
return {0,0};
if (idx == m_glyphInfo.size())
--idx;
size_t begin = idx;
while (begin > 0 && !m_glyphInfo[begin-1].m_space)
--begin;
size_t end = idx;
while (end < m_glyphInfo.size() && !m_glyphInfo[end].m_space)
++end;
return {begin, end-begin};
}
}
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