1/* Copyright (c) 2013-2015 Jeffrey Pfau
 2 *
 3 * This Source Code Form is subject to the terms of the Mozilla Public
 4 * License, v. 2.0. If a copy of the MPL was not distributed with this
 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 6#include "util/gui/font.h"
 7#include "util/gui/font-metrics.h"
 8#include "font.h"
 9
10#include <ogc/tpl.h>
11
12#define GLYPH_HEIGHT 12
13#define CELL_HEIGHT 16
14#define CELL_WIDTH 16
15
16struct GUIFont {
17	TPLFile tdf;
18};
19
20struct GUIFont* GUIFontCreate(void) {
21	struct GUIFont* guiFont = malloc(sizeof(struct GUIFont));
22	if (!guiFont) {
23		return 0;
24	}
25
26	// libogc's TPL code modifies and frees this itself...
27	void* fontTpl = memalign(32, font_size);
28	if (!fontTpl) {
29		free(guiFont);
30		return 0;
31	}
32	memcpy(fontTpl, font, font_size);
33	TPL_OpenTPLFromMemory(&guiFont->tdf, fontTpl, font_size);
34	return guiFont;
35}
36
37void GUIFontDestroy(struct GUIFont* font) {
38	TPL_CloseTPLFile(&font->tdf);
39	free(font);
40}
41
42int GUIFontHeight(const struct GUIFont* font) {
43	UNUSED(font);
44	return GLYPH_HEIGHT;
45}
46
47void GUIFontPrintf(const struct GUIFont* font, int x, int y, enum GUITextAlignment align, uint32_t color, const char* text, ...) {
48	UNUSED(align); // TODO
49	char buffer[256];
50	va_list args;
51	va_start(args, text);
52	int len = vsnprintf(buffer, sizeof(buffer), text, args);
53	va_end(args);
54	int i;
55	GXTexObj tex;
56	// Grumble grumble, libogc is bad about const-correctness
57	struct GUIFont* ncfont = font;
58	TPL_GetTexture(&ncfont->tdf, 0, &tex);
59	GX_LoadTexObj(&tex, GX_TEXMAP0);
60
61	GX_SetBlendMode(GX_BM_BLEND, GX_BL_SRCALPHA, GX_BL_INVSRCALPHA, GX_LO_NOOP);
62	GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_TEX0, GX_TEX_ST, GX_F32, 0);
63
64	for (i = 0; i < len; ++i) {
65		char c = buffer[i];
66		if (c > 0x7F) {
67			c = 0;
68		}
69		struct GUIFontGlyphMetric metric = defaultFontMetrics[c];
70		s16 tx = (c & 15) * CELL_WIDTH + metric.padding.left;
71		s16 ty = (c >> 4) * CELL_HEIGHT + metric.padding.top;
72		GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
73		GX_Position2s16(x, y - GLYPH_HEIGHT + metric.padding.top);
74		GX_TexCoord2f32(tx / 256.f, ty / 128.f);
75
76		GX_Position2s16(x + CELL_WIDTH - (metric.padding.left + metric.padding.right), y - GLYPH_HEIGHT + metric.padding.top);
77		GX_TexCoord2f32((tx + CELL_WIDTH - (metric.padding.left + metric.padding.right)) / 256.f, ty / 128.f);
78
79		GX_Position2s16(x + CELL_WIDTH - (metric.padding.left + metric.padding.right), y - GLYPH_HEIGHT + CELL_HEIGHT - metric.padding.bottom);
80		GX_TexCoord2f32((tx + CELL_WIDTH - (metric.padding.left + metric.padding.right)) / 256.f, (ty + CELL_HEIGHT - (metric.padding.top + metric.padding.bottom)) / 128.f);
81
82		GX_Position2s16(x, y - GLYPH_HEIGHT + CELL_HEIGHT - metric.padding.bottom);
83		GX_TexCoord2f32(tx / 256.f, (ty + CELL_HEIGHT - (metric.padding.top + metric.padding.bottom)) / 128.f);
84		GX_End();
85		x += metric.width;
86	}
87}