From b66e67e3a5f2680ee0e44228fce0fcaeff87206b Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Thu, 19 Dec 2019 04:48:56 +0100
Subject: eve textbox added; eve cmd result function added

---
 code/fe310/eos/eve_text.c | 100 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 code/fe310/eos/eve_text.c

(limited to 'code/fe310/eos/eve_text.c')

diff --git a/code/fe310/eos/eve_text.c b/code/fe310/eos/eve_text.c
new file mode 100644
index 0000000..73fcb65
--- /dev/null
+++ b/code/fe310/eos/eve_text.c
@@ -0,0 +1,100 @@
+#include "eve.h"
+#include "eve_text.h"
+
+static int _line_diff(EVETextBox *box, int line) {
+    if (line > box->line_idx) {
+        return line - box->line_idx;
+    } else {
+        return box->buf_line_h - box->line_idx + line;
+    }
+}
+
+static void _line_scroll(EVETextBox *box) {
+    box->line_idx = (box->line_idx + 1) % box->buf_line_h;
+    eos_eve_cmd(CMD_MEMSET, "www", EVE_RAM_G + box->buf_addr + box->buf_idx, 0x0, box->w * 2);
+    eos_eve_cmd_exec(1);
+    eos_eve_dl_start(box->dl_offset);
+    eos_eve_text_update(box);
+    eos_eve_dl_swap();
+}
+
+void eos_eve_text_init(EVETextBox *box, uint16_t buf_addr, int buf_line_h, int w, int h, int x, int y, uint8_t bitmap_handle) {
+    box->buf_addr = buf_addr;
+    box->buf_line_h = buf_line_h;
+    box->w = w;
+    box->h = h;
+    box->x = x;
+    box->y = y;
+    box->buf_idx = 0;
+    box->line_idx = 0;
+    box->dl_offset = 0;
+    box->bitmap_handle = bitmap_handle;
+
+    eos_eve_cmd(CMD_MEMSET, "www", EVE_RAM_G + buf_addr, 0x0, w * 2 * buf_line_h);
+    eos_eve_cmd_exec(1);
+}
+
+void eos_eve_text_update(EVETextBox *box) {
+    int text_h1;
+    int text_h2;
+
+    eos_eve_dl_write(BITMAP_HANDLE(box->bitmap_handle));
+    eos_eve_dl_write(BITMAP_SOURCE(box->buf_addr + box->line_idx * box->w * 2));
+    if (box->line_idx + box->h > box->buf_line_h) {
+        text_h1 = box->buf_line_h - box->line_idx;
+        text_h2 = box->h - text_h1;
+    } else {
+        text_h1 = box->h;
+        text_h2 = 0;
+    }
+    eos_eve_dl_write(BITMAP_LAYOUT(EVE_TEXTVGA, box->w * 2, text_h1));
+    eos_eve_dl_write(BITMAP_SIZE(EVE_NEAREST, EVE_BORDER, EVE_BORDER, box->w * 8, text_h1 * 16));
+
+    if (text_h2) {
+        eos_eve_dl_write(BITMAP_HANDLE(box->bitmap_handle+1));
+        eos_eve_dl_write(BITMAP_SOURCE(box->buf_addr));
+        eos_eve_dl_write(BITMAP_LAYOUT(EVE_TEXTVGA, box->w * 2, text_h2));
+        eos_eve_dl_write(BITMAP_SIZE(EVE_NEAREST, EVE_BORDER, EVE_BORDER, box->w * 8, text_h2 * 16));
+    } else {
+        eos_eve_dl_write(NOP());
+        eos_eve_dl_write(NOP());
+        eos_eve_dl_write(NOP());
+        eos_eve_dl_write(NOP());
+    }
+
+    eos_eve_dl_write(BEGIN(EVE_BITMAPS));
+    eos_eve_dl_write(VERTEX2II(box->x, box->y, 0, 0));
+    if (text_h2) {
+        eos_eve_dl_write(VERTEX2II(box->x, box->y + text_h1 * 16, 1, 0));
+    } else {
+        eos_eve_dl_write(NOP());
+    }
+    eos_eve_dl_write(END());
+}
+
+void eos_eve_text_draw(EVETextBox *box) {
+    box->dl_offset = eos_eve_dl_offset();
+    eos_eve_text_update(box);
+}
+
+void eos_eve_text_putc(EVETextBox *box, int c) {
+    int line_c, line_n;
+
+    line_c = box->buf_idx / 2 / box->w;
+
+    eos_eve_write16(EVE_RAM_G + box->buf_addr + box->buf_idx, 0x0A00 | (c & 0xff));
+    box->buf_idx = (box->buf_idx + 2) % (box->buf_line_h * box->w * 2);
+
+    line_n = box->buf_idx / 2 / box->w;
+    if ((line_c != line_n) && (_line_diff(box, line_n) == box->h)) {
+        _line_scroll(box);
+    }
+}
+
+void eos_eve_text_newline(EVETextBox *box) {
+    int line = (box->buf_idx / 2 / box->w + 1) % box->buf_line_h;
+    box->buf_idx = line * box->w * 2;
+    if (_line_diff(box, line) == box->h) {
+        _line_scroll(box);
+    }
+}
\ No newline at end of file
-- 
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