Open source Star Ruler 2 source code!
This commit is contained in:
Lucas de Vries
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#include "render/font.h"
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#include "render/driver.h"
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#include <stdio.h>
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#include "str_util.h"
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#include "vec2.h"
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#include "main/initialization.h"
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#include <algorithm>
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namespace resource {
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extern render::Texture* queueImage(const std::string& abs_file, int priority, bool mipmap, bool cachePixels, bool cubemap = false);
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};
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namespace render {
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class FontFNT : public Font {
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public:
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std::vector<render::RenderState*> textures;
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struct Glyph {
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unsigned short x : 16, y : 16;
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bool draw : 1;
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unsigned char page : 3;
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unsigned char w : 8, h : 8;
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char wOff : 8, hOff : 8;
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unsigned char xAdv : 8;
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};
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struct GlyphEntry {
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fontChar letter;
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Glyph glyph;
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bool operator<(const GlyphEntry& other) const { return letter < other.letter; }
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GlyphEntry(fontChar Letter) : letter(Letter) {}
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GlyphEntry(fontChar Letter, Glyph& Glyph) : letter(Letter), glyph(Glyph) {}
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};
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struct KernEntry {
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union {
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unsigned v;
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struct { fontChar left : 16, right : 16; };
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};
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int offset;
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bool operator<(const KernEntry& other) const { return v < other.v; }
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KernEntry(fontChar Left, fontChar Right) : left(Left), right(Right) {}
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};
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Glyph* lowChars;
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std::vector<GlyphEntry> hiChars;
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std::vector<KernEntry> kerning;
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unsigned glyphHeight, textureHeight, textureWidth;
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unsigned getBaseline() const {
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return glyphHeight;
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}
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unsigned getLineHeight() const {
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return glyphHeight;
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}
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void draw(render::RenderDriver* driver, const char* text, int X, int Y, const Color* color, const recti* clip = 0) const {
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int x = X, y = Y;
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Color colors[4];
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if(color)
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colors[0] = colors[1] = colors[2] = colors[3] = *color;
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float xFactor = 1.f / float(textureWidth), yFactor = 1.f / float(textureHeight);
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vec2f font_verts[4], font_tc[4];
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rectf fclip;
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if(clip)
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fclip = rectf(*clip);
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unsigned lastTexture = (unsigned)textures.size();
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fontChar lastC = 0;
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u8it it(text);
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while(fontChar c = it++) {
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if(c == L'\n') {
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y += glyphHeight;
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x = X;
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lastC = 0;
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}
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else {
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if(lastC) {
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auto k = std::lower_bound(kerning.begin(), kerning.end(), KernEntry(lastC, c));
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if(k != kerning.end() && k->left == lastC && k->right == c)
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x += k->offset;
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}
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lastC = c;
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Glyph glyph;
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if(c <= 0xff)
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glyph = lowChars[c];
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else {
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auto g = std::lower_bound(hiChars.begin(), hiChars.end(), c);
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if(g != hiChars.end() && g->letter == c) {
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glyph = g->glyph;
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}
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else {
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glyph = lowChars['?'];
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}
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}
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if(glyph.draw) {
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rectf pos = rectf::area(vec2f((float)(x + glyph.wOff), (float)(y + glyph.hOff)), vec2f(glyph.w, glyph.h));
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rectf source = rectf::area(vec2f((float)glyph.x * xFactor, (float)glyph.y * yFactor),
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vec2f((float)glyph.w * xFactor, (float)glyph.h * yFactor));
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if(clipQuad(pos, source, clip ? &fclip : 0, font_verts, font_tc)) {
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if(glyph.page != lastTexture) {
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auto& mat = *textures[glyph.page];
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driver->switchToRenderState(mat);
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lastTexture = glyph.page;
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}
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driver->drawQuad(font_verts,font_tc,color ? colors : 0);
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}
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}
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x += glyph.xAdv;
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}
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}
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}
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vec2i drawChar(render::RenderDriver* driver, int c, int lastC,
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int X, int Y, const Color* color, const recti* clip = 0) const {
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int x = X, y = Y;
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Color colors[4];
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if(color)
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colors[0] = colors[1] = colors[2] = colors[3] = *color;
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float xFactor = 1.f / float(textureWidth), yFactor = 1.f / float(textureHeight);
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vec2f font_verts[4], font_tc[4];
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rectf fclip;
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if(clip)
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fclip = rectf(*clip);
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if(lastC) {
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auto k = std::lower_bound(kerning.begin(), kerning.end(), KernEntry(lastC, c));
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if(k != kerning.end() && k->left == lastC && k->right == c)
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x += k->offset;
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}
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Glyph glyph;
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if(c <= 0xff)
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glyph = lowChars[c];
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else {
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auto g = std::lower_bound(hiChars.begin(), hiChars.end(), c);
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if(g != hiChars.end() && g->letter == c) {
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glyph = g->glyph;
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}
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else {
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glyph = lowChars['?'];
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}
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}
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if(glyph.draw) {
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rectf pos = rectf::area(vec2f((float)(x + glyph.wOff), (float)(y + glyph.hOff)), vec2f(glyph.w, glyph.h));
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rectf source = rectf::area(vec2f((float)glyph.x * xFactor, (float)glyph.y * yFactor),
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vec2f((float)glyph.w * xFactor, (float)glyph.h * yFactor));
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if(clipQuad(pos, source, clip ? &fclip : 0, font_verts, font_tc)) {
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auto& mat = *textures[glyph.page];
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driver->switchToRenderState(mat);
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driver->drawQuad(font_verts,font_tc,color ? colors : 0);
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}
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}
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x += glyph.xAdv;
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return vec2i(x - X, y - Y);
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}
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vec2i getDimension(const char* text) const {
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vec2i size(0, glyphHeight);
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fontChar lastC = 0;
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u8it it(text);
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while(fontChar c = it++) {
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if(lastC) {
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auto k = std::lower_bound(kerning.begin(), kerning.end(), KernEntry(lastC, c));
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if(k != kerning.end() && k->left == lastC && k->right == c)
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size.x += k->offset;
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}
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lastC = c;
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const Glyph* glyph = 0;
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if(c <= 0xff) {
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glyph = &lowChars[c];
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}
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else {
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auto g = std::lower_bound(hiChars.begin(), hiChars.end(), c);
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if(g != hiChars.end() && g->letter == c)
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glyph = &g->glyph;
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else
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glyph = &lowChars['?'];
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}
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if(glyph)
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size.x += glyph->xAdv;
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++text;
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}
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return size;
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}
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vec2i getDimension(int c, int lastC) const {
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vec2i size(0, glyphHeight);
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if(lastC) {
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auto k = std::lower_bound(kerning.begin(), kerning.end(), KernEntry(lastC, c));
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if(k != kerning.end() && k->left == lastC && k->right == c)
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size.x += k->offset;
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}
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const Glyph* glyph = 0;
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if(c <= 0xff) {
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glyph = &lowChars[c];
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}
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else {
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auto g = std::lower_bound(hiChars.begin(), hiChars.end(), c);
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if(g != hiChars.end() && g->letter == c)
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glyph = &g->glyph;
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else
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glyph = &lowChars['?'];
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}
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if(glyph)
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size.x += glyph->xAdv;
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return size;
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}
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FontFNT()
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: lowChars(new Glyph[256]), glyphHeight(0), textureHeight(1), textureWidth(1)
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{
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memset(lowChars, 0, sizeof(Glyph) * 256);
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}
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~FontFNT()
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{
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delete[] lowChars;
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foreach(tex, textures)
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delete *tex;
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}
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};
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Font* loadFontFNT(render::RenderDriver* driver, const char* filename) {
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auto file = fopen(filename, "r");
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if(file == 0)
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return 0;
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auto slash = strrchr(filename, '/');
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if(auto bSlash = strrchr(filename, '\\'))
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if(bSlash > slash)
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slash = bSlash;
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std::string folder(filename, slash ? slash + 1 - filename : 0);
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//Skip first line
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do {
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int c = fgetc(file);
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if(c == L'\n' || c == L'\r' || c == EOF)
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break;
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} while(true);
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if(feof(file)) {
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fclose(file);
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return 0;
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}
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FontFNT* font = new FontFNT;
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if(false) {
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failedLoad:
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delete font;
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fclose(file);
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return 0;
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}
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int pages, lineCheck;
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if(fscanf(file,
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" common lineHeight=%i base=%*i scaleW=%i scaleH=%i pages=%i packed=%*i alphaChnl=%*i redChnl=%*i greenChnl=%*i blueChnl=%i ",
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&font->glyphHeight, &font->textureWidth, &font->textureHeight, &pages, &lineCheck) < 5
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|| pages == 0 || pages > 7 || font->glyphHeight <= 0)
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goto failedLoad;
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int page; char pageName[256];
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while(pages--) {
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int args = fscanf(file,"page id=%i file=%255s ", &page, pageName);
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if(args < 2 || (unsigned int)page != font->textures.size())
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goto failedLoad;
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std::string pageFile = folder + trim(pageName,"\"");
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auto material = new render::RenderState();
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material->depthTest = render::DT_NoDepthTest;
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material->lighting = false;
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material->culling = render::FC_None;
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material->baseMat = render::MAT_Alpha;
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if(load_resources)
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material->textures[0] = resource::queueImage(pageFile, 20, true, false);
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font->textures.push_back(material);
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}
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int glyphs;
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if(fscanf(file, "chars count=%i ", &glyphs) != 1)
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goto failedLoad;
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while(glyphs--) {
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int c, x, y, w, h, wOff, hOff, xAdv, page, channel;
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if(fscanf(file, "char id=%i x=%i y=%i width=%i height=%i xoffset=%i yoffset=%i xadvance=%i page=%i chnl=%i ",
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&c, &x, &y, &w, &h, &wOff, &hOff, &xAdv, &page, &channel) != 10
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|| page < 0 || page >= (int)font->textures.size())
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goto failedLoad;
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FontFNT::Glyph glyph;
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glyph.draw = c != 32;
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glyph.x = x;
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glyph.y = y;
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glyph.w = w;
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glyph.h = h;
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glyph.wOff = wOff;
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glyph.hOff = hOff;
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glyph.xAdv = xAdv;
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glyph.page = page;
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if(c <= 0xff)
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font->lowChars[c] = glyph;
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else
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font->hiChars.push_back(FontFNT::GlyphEntry(c,glyph));
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}
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//Load kerning data
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int kerns;
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if(fscanf(file, "kernings count=%i ", &kerns) == 1) {
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while(kerns--) {
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int left, right, offset;
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if(fscanf(file, "kerning first=%i second=%i amount=%i ", &left, &right, &offset) == 3) {
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FontFNT::KernEntry kerning((fontChar)left, (fontChar)right);
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kerning.offset = offset;
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font->kerning.push_back(kerning);
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}
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else {
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break;
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}
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}
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}
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std::sort(font->hiChars.begin(), font->hiChars.end());
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std::sort(font->kerning.begin(), font->kerning.end());
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return font;
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}
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};
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