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#include "../Graphics/CustomVertexLayout.h"
#include "Runtime/Utilities/StaticInitiator.h"
#include "../Math/Math.h"
#include "../Graphics/Color.h"
#include "TextMesh.h"
#include <vector>
#include <unordered_map>
using namespace std;
struct TextMeshVBOLayout
{
Vector2 position;
Vector2 uv;
Color32 color;
};
static CustomVertexLayout s_TextMeshVBOLayout;
static unsigned int s_VertexPerText;
static unsigned int s_SizePerVertex;
static unsigned int s_SizePerText;
static unsigned int s_IndicesPerText;
struct TextInfo {
const Character* ch;
float offset;
};
static unordered_map<unsigned int, vector<TextInfo>> s_TextInfos;
InitializeStaticVariables([]() {
VertexAttributeDescriptor POSITION = VertexAttributeDescriptor(0, 2, VertexAttrFormat_Float, sizeof(TextMeshVBOLayout));
VertexAttributeDescriptor UV = VertexAttributeDescriptor(sizeof(Vector2), 2, VertexAttrFormat_Float, sizeof(TextMeshVBOLayout));
VertexAttributeDescriptor COLOR = VertexAttributeDescriptor(sizeof(Vector2)*2, 4, VertexAttrFormat_Unsigned_Byte, sizeof(TextMeshVBOLayout), true);
s_TextMeshVBOLayout.attributes.push_back(POSITION);
s_TextMeshVBOLayout.attributes.push_back(UV);
s_TextMeshVBOLayout.attributes.push_back(COLOR);
s_VertexPerText = 4;
s_SizePerVertex = sizeof(TextMeshVBOLayout);
s_SizePerText = sizeof(TextMeshVBOLayout) * 4;
s_IndicesPerText = 6;
});
TextMesh::TextMesh(const UnicodeString& str, Font* font,int pixelSize, ETextAnchor anchor, ETextAlignment alignment)
{
m_Font = font;
s_TextInfos.clear();
float offset = 0;
for (int i = 0; i < str.length; ++i)
{
character::Codepoint c = str.str[i];
const Character* ch = font->GetCharacter(c, pixelSize);
unsigned int index = ch->atlas;
TextInfo info;
info.ch = ch;
info.offset = offset;
auto list = s_TextInfos.find(index);
if (list == s_TextInfos.end())
{
s_TextInfos.insert(std::pair<unsigned int, vector<TextInfo>>(index, vector<TextInfo>()));
list = s_TextInfos.find(index);
}
vector<TextInfo>& v = list->second;
v.push_back(info);
offset += ch->advance;
}
if (s_TextInfos.size() == 0)
return;
for (auto iter : s_TextInfos) {
unsigned int index = iter.first;
vector<TextInfo>& texts = iter.second;
int count = texts.size();
VertexBuffer* vb = new VertexBuffer(count * s_SizePerText, count * s_IndicesPerText, VertexBuffer::VertexBufferType_Static);
}
}
void TextMesh::Draw()
{
}
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