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-rw-r--r--src/libjin/graphics/fonts/texture_font.cpp309
1 files changed, 309 insertions, 0 deletions
diff --git a/src/libjin/graphics/fonts/texture_font.cpp b/src/libjin/graphics/fonts/texture_font.cpp
new file mode 100644
index 0000000..31e5293
--- /dev/null
+++ b/src/libjin/graphics/fonts/texture_font.cpp
@@ -0,0 +1,309 @@
+#include <vector>
+
+#include "../../math/vector2.hpp"
+
+#include "../shaders/shader.h"
+
+#include "texture_font.h"
+
+using namespace std;
+using namespace JinEngine::Math;
+using namespace JinEngine::Graphics::Shaders;
+
+namespace JinEngine
+{
+ namespace Graphics
+ {
+ namespace Fonts
+ {
+
+ TextureFont::TextureFont(const Bitmap* bitmap, const Content& codepoints, int cellw, int cellh)
+ : Graphic(bitmap)
+ , Font(cellh)
+ {
+ TextureGlyph glyph;
+ Vector2<int> count(bitmap->getWidth() / cellw, bitmap->getHeight() / cellh);
+ glyph.w = cellw;
+ glyph.h = cellh;
+ for (int y = 0; y < count.row(); ++y)
+ {
+ glyph.y = y * cellh;
+ for (int x = 0; x < count.colum(); ++x)
+ {
+ glyph.x = x * cellw;
+ if (x + y * count.colum() >= codepoints.size())
+ return;
+ glyphs.insert(std::pair<Codepoint, TextureGlyph>(codepoints[x + y * count.colum()], glyph));
+ }
+ }
+ }
+
+ TextureFont::TextureFont(const Bitmap* bitmap, const Content& codepoints, Color mask, int cellh)
+ : Graphic(bitmap)
+ , Font(cellh)
+ {
+ TextureGlyph glyph;
+ glyph.h = cellh;
+ int w = bitmap->getWidth();
+ int h = bitmap->getHeight();
+ int i = 0;
+ for (int y = 0; y < h; y += cellh)
+ {
+ glyph.y = y;
+ bool newc = false;
+ for (int x = 0; x <= w; ++x)
+ {
+ if (x == w && newc)
+ {
+ glyph.w = x - glyph.x;
+ if (i >= codepoints.size())
+ return;
+ glyphs.insert(std::pair<Codepoint, TextureGlyph>(codepoints[i], glyph));
+ ++i;
+ newc = false;
+ break;
+ }
+ Color c = bitmap->getPixels()[x + y * w];
+ if (!newc && c != mask)
+ {
+ glyph.x = x;
+ newc = true;
+ }
+ else if (newc && c == mask)
+ {
+ glyph.w = x - glyph.x;
+ if (i >= codepoints.size())
+ return;
+ glyphs.insert(std::pair<Codepoint, TextureGlyph>(codepoints[i], glyph));
+ if (codepoints[i] == 't')
+ {
+ int a = 10;
+ }
+ ++i;
+ newc = false;
+ }
+ }
+ }
+ }
+
+ TextureFont::TextureFont(const Bitmap* bitmap, const Text& text, Color mask, int cellh)
+ : TextureFont(bitmap, *text, mask, cellh)
+ {
+ }
+
+ TextureFont::TextureFont(const Bitmap* bitmap, const Text& text, int cellw, int cellh)
+ : TextureFont(bitmap, *text, cellw, cellh)
+ {
+ }
+
+ TextureFont::~TextureFont()
+ {
+ }
+
+ const TextureFont::TextureGlyph* TextureFont::findGlyph(Codepoint codepoint) const
+ {
+ auto it = glyphs.find(codepoint);
+ if (it != glyphs.end())
+ {
+ return &it->second;
+ }
+ else
+ return nullptr;
+ }
+
+ Page* TextureFont::typeset(const Content& text, int lineheight, int spacing)
+ {
+ Page* page = new Page();
+ page->font = this;
+ vector<GlyphArrayDrawInfo>& glyphinfolist = page->glyphinfolist;
+ vector<GlyphVertex>& glyphvertices = page->glyphvertices;
+ int texture = -1;
+ const TextureGlyph* glyph = nullptr;
+ GlyphVertex vertex;
+ Vector2<int> p(0, 0);
+ int i = 0;
+
+#define glyphvertices_push(_x, _y, _u, _v) \
+ vertex.x = _x; vertex.y = _y;\
+ vertex.u = _u; vertex.v = _v;\
+ glyphvertices.push_back(vertex);\
+
+ for (Codepoint c : text)
+ {
+ // return
+ if (c == 0x0D) continue;
+ // newline
+ if (c == 0x0A)
+ {
+ p.y() += lineheight;
+ p.x() = 0;
+ continue;
+ }
+ if (c == 0x09)
+ {
+ // tab = 4*space
+ unsigned cw = getCharWidth(0x20);
+ p.x() += cw * 4;
+ continue;
+ }
+ glyph = findGlyph(c);
+ if (glyph == nullptr) continue;
+ if (texture != getGLTexture())
+ {
+ texture = getGLTexture();
+ GlyphArrayDrawInfo info;
+ info.start = i;
+ info.count = 0;
+ info.texture = texture;
+ glyphinfolist.push_back(info);
+ }
+ glyphinfolist[glyphinfolist.size() - 1].count += 4;
+ // normalized
+ float w = getWidth(), h = getHeight();
+ float nx = glyph->x / w, ny = glyph->y / h;
+ float nw = glyph->w / w, nh = glyph->h / h;
+ glyphvertices_push(p.x(), p.y(), nx, ny);
+ glyphvertices_push(p.x(), p.y() + glyph->h, nx, ny + nh);
+ glyphvertices_push(p.x() + glyph->w, p.y() + glyph->h, nx + nw, ny + nh);
+ glyphvertices_push(p.x() + glyph->w, p.y(), nx + nw, ny);
+ p.x() += glyph->w + spacing;
+ i += 4;
+ }
+ getTextBox(text, &page->size.w(), &page->size.h(), lineheight, spacing);
+ return page;
+ }
+
+ int TextureFont::getCharWidth(int c)
+ {
+ auto it = glyphs.find(c);
+ if (it != glyphs.end())
+ {
+ return it->second.w;
+ }
+ return 0;
+ }
+
+ int TextureFont::getCharHeight(int c)
+ {
+ auto it = glyphs.find(c);
+ if (it != glyphs.end())
+ {
+ return it->second.h;
+ }
+ return 0;
+ }
+
+ int TextureFont::getTextWidth(const Content& t, int spacing)
+ {
+ int res = 0;
+ int tmp = 0;
+ for (Codepoint c : t)
+ {
+ if (c == 0x0D)
+ continue;
+ if (c == 0x0A)
+ {
+ tmp = 0;
+ continue;
+ }
+ if (c == 0x09)
+ {
+ // tab = 4*space
+ unsigned cw = getCharWidth(0x20);
+ tmp += cw * 4;
+ if (tmp > res) res = tmp;
+ continue;
+ }
+ tmp += getCharWidth(c) + spacing;
+ if (tmp > res) res = tmp;
+ }
+ return res;
+ }
+
+ int TextureFont::getTextHeight(const Content& t, int lineheight)
+ {
+ int res = 0;
+ bool newline = true;
+ for (Codepoint c : t)
+ {
+ if (c == 0x0A)
+ newline = true;
+ else if (c == 0x0D);
+ else if (newline)
+ {
+ newline = false;
+ res += lineheight;
+ }
+ }
+ return res;
+ }
+
+ void TextureFont::getTextBox(const Content& text, int* w, int* h, int lineheight, int spacing)
+ {
+ *w = 0;
+ *h = 0;
+ int tmp = 0;
+ bool newline = true;
+ for (Codepoint c : text)
+ {
+ if (c == 0x0D)
+ continue;
+ if (c == 0x0A)
+ {
+ tmp = 0;
+ newline = true;
+ continue;
+ }
+ else if (newline)
+ {
+ newline = false;
+ *h += lineheight;
+ }
+ tmp += getCharWidth(c) + spacing;
+ if (tmp > *w)
+ *w = tmp;
+ }
+ }
+
+ Page* TextureFont::typeset(const Text& text, int lineheight, int spacing)
+ {
+ return typeset(*text, lineheight, spacing);
+ }
+
+ void TextureFont::render(const Page* page, int x, int y)
+ {
+ Shader* shader = gl.getShader();
+ const vector<GlyphArrayDrawInfo>& glyphinfolist = page->glyphinfolist;
+ const vector<GlyphVertex>& glyphvertices = page->glyphvertices;
+ Matrix modelMatrix = gl.getModelViewMatrix(x, y, 1, 1, 0, 0, 0);
+ shader->begin()
+ .sendMatrix4(SHADER_MODELVIEW_MATRIX, &modelMatrix)
+ .sendMatrix4(SHADER_PROJECTION_MATRIX, &gl.getProjectionMatrix());
+ for (int i = 0; i < glyphinfolist.size(); ++i)
+ {
+ const GlyphArrayDrawInfo& info = glyphinfolist[i];
+ shader->uploadVertices(2, GL_INT, sizeof(GlyphVertex), &glyphvertices[info.start].x)
+ .uploadUV(2, GL_FLOAT, sizeof(GlyphVertex), &glyphvertices[info.start].u);
+ gl.bindTexture2D(info.texture);
+ gl.drawArrays(GL_QUADS, 0, info.count);
+ }
+ shader->end();
+ }
+
+ void TextureFont::render(const Content& text, int x, int y, int lineheight, int spacing)
+ {
+ Page* page = typeset(text, lineheight, spacing);
+ render(page, x, y);
+ delete page;
+ }
+
+ void TextureFont::render(const Text& text, int x, int y, int lineheight, int spacing)
+ {
+ Page* page = typeset(text, lineheight, spacing);
+ render(page, x, y);
+ delete page;
+ }
+
+ }
+ }
+} \ No newline at end of file
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