- First commit to gitea

font.cpp

@@ -0,0 +1,108 @@
+#include "font.h"
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <SDL2/SDL_opengl.h>
+#include "texture.h"
+#include "renderer.h"
+
+static float colors[16][4] = {
+	{0, 0, 0, 1},
+	{0.5f, 0, 0, 1},
+	{0, 0.5f, 0, 1},
+	{0.5f, 0.5f, 0, 1},
+	{0, 0, 0.5f, 1},
+	{0.5f, 0, 0.5f, 1},
+	{0, 0.5f, 0.5f, 1},
+	{0.75f, 0.75f, 0.75f, 1},
+	{0.5f, 0.5f, 0.5f, 1},
+	{1, 0, 0, 1},
+	{0, 1, 0, 1},
+	{1, 1, 0, 1},
+	{0, 0, 1, 1},
+	{1, 0, 1, 1},
+	{0, 1, 1, 1},
+	{1, 1, 1, 1},
+};
+
+void Font::Load(const char* filename)
+{
+	char name[16]; strcpy(name, filename); strcat(name, ".fnt");
+
+	FILE* fin = fopen(name, "ra");
+	if (fin == NULL) return;
+
+	char line[256];
+
+	fgets(line, 255, fin);
+	fgets(line, 255, fin);
+	int lh, sw, sh;
+	assert(sscanf(line, "common lineHeight=%i base=%*i scaleW=%i scaleH=%i", &lh, &sw, &sh) == 3);
+	lineHeight = lh;
+	bw = sw;
+	bh = sh;
+
+	fgets(line, 255, fin);
+	fgets(line, 255, fin);
+	int numChars;
+	assert(sscanf(line, "chars count=%i", &numChars) == 1);
+
+	for (int i = 0; i < numChars; i++) {
+		fgets(line, 255, fin);
+		int id, x, y, w, h, xo, yo, xa;
+		assert(sscanf(line, "char id=%i x=%i y=%i width=%i height=%i xoffset=%i yoffset=%i xadvance=%i", &id, &x, &y, &w, &h, &xo, &yo, &xa) == 8);
+		FontChar& c = chars[id-32];
+		c.w  = w;
+		c.h  = h;
+		c.x1  = float(x)/float(bw);
+		c.y1  = float(y)/float(bh);
+		c.x2  = c.x1 + float(w)/float(bw);
+		c.y2  = c.y1 + float(h)/float(bh);;
+		c.xo = xo;
+		c.yo = yo;
+		c.xa = xa;
+	}
+
+	texture = Texture::Create();
+	Texture::Load(texture, filename);
+	fclose(fin);
+}
+
+void Font::Print(int x, int y, const char* text, char color)
+{
+	const unsigned long len = strlen(text);
+
+	Renderer::SetState(RENDER_FILL | RENDER_BLEND | RENDER_TEXTURE);
+	glBindTexture(GL_TEXTURE_2D, texture);
+	glBegin(GL_QUADS);
+	glColor4fv(colors[color]);
+	for (int i = 0; i < len; i++) {
+		FontChar& c = chars[text[i]-32];
+		glTexCoord2f(c.x1, c.y1);
+		glVertex2i(x+c.xo, y+c.yo);
+		glTexCoord2f(c.x1, c.y2);
+		glVertex2i(x+c.xo, y+c.yo+c.h);
+		glTexCoord2f(c.x2, c.y2);
+		glVertex2i(x+c.xo+c.w, y+c.yo+c.h);
+		glTexCoord2f(c.x2, c.y1);
+		glVertex2i(x+c.xo+c.w, y+c.yo);
+		x += c.xa;
+	}
+	glEnd();
+
+}
+
+Vector2 Font::GetSize(const char* text)
+{
+	Vector2 size;
+	size.y = lineHeight;
+	const unsigned long len = strlen(text);
+	for (int i = 0; i < len; i++) {
+		//if (i == len-1) {
+		//	size.x += chars[text[i]-32].w;
+		//} else {
+			size.x += chars[text[i]-32].xa;
+		//}
+	}
+	return size;
+}