Diff: mbed-gr-libs/AsciiFont/AsciiFont.cpp

Revision:

0:e9fd5575b10e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-gr-libs/AsciiFont/AsciiFont.cpp	Fri Oct 18 03:09:43 2019 +0000
@@ -0,0 +1,119 @@
+/* Copyright (c) 2016 dkato
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "mbed.h"
+#include "AsciiFont.h"
+#include "ascii.h"
+
+AsciiFont::AsciiFont(uint8_t * p_buf, int width, int height, int stride, int byte_per_pixel, uint32_t const colour) : 
+    p_text_field(p_buf), max_width(width), max_height(height), buf_stride(stride), pixel_num(byte_per_pixel), background_colour(colour) {
+    
+}
+
+void AsciiFont::Erase() {
+    Erase(background_colour, 0, 0, max_width, max_height);
+}
+
+void AsciiFont::Erase(uint32_t const colour) {
+    Erase(colour, 0, 0, max_width, max_height);
+}
+
+void AsciiFont::Erase(uint32_t const colour, int x, int y, int width, int height) {
+    int idx_base;
+    int wk_idx, i, j ,k;
+
+    background_colour = colour;
+    if ((x + width) > max_width) {
+        width = max_width - x;
+    }
+    if ((y + height) > max_height) {
+        height = max_height - y;
+    }
+    idx_base = (x * pixel_num) + (buf_stride * y);
+    for (i = 0; i < height; i++) {
+        wk_idx = idx_base + (buf_stride * i);
+        for (j = 0; j < width; j++) {
+            for (k = (pixel_num - 1); k >= 0; k--) {
+                p_text_field[wk_idx++] = (uint8_t)(background_colour >> (8 * k));
+            }
+        }
+    }
+}
+
+int AsciiFont::DrawStr(const char * str, int x, int y, uint32_t const colour, int font_size, uint16_t const max_char_num) {
+    int char_num = 0;
+
+    if ((str == NULL) || (font_size <= 0)) {
+        return 0;
+    }
+    while ((*str != '\0') && (char_num < max_char_num)) {
+        if (DrawChar(*str, x, y, colour, font_size) == false) {
+            break;
+        }
+        str++;
+        x += CHAR_PIX_WIDTH * font_size;
+        char_num++;
+    }
+    return char_num;
+}
+
+bool AsciiFont::DrawChar(char c, int x, int y, uint32_t const colour, int font_size) {
+    int idx_base;
+    int idx_y = 0;
+    int wk_idx, i, j ,k, fw, fh;
+    char * p_pattern;
+    uint8_t mask = 0x80;
+    uint32_t wk_colour;
+
+    if (font_size <= 0) {
+        return false;
+    }
+    if ((x + (CHAR_PIX_WIDTH * font_size)) > max_width) {
+        return false;
+    }
+    if ((y + (CHAR_PIX_HEIGHT * font_size)) > max_height) {
+        return false;
+    }
+
+    if ((c >= 0x20) && (c <= 0x7e)) {
+        p_pattern = (char *)&g_ascii_table[c - 0x20][0];
+    } else {
+        p_pattern = (char *)&g_ascii_table[10][0]; /* '*' */
+    }
+    idx_base = (x * pixel_num) + (buf_stride * y);
+
+    /* Drawing */
+    for (i = 0; i < CHAR_PIX_HEIGHT; i++) {
+        for (fh = 0; fh < font_size; fh++) {
+            wk_idx = idx_base + (buf_stride * idx_y);
+            for (j = 0; j < CHAR_PIX_WIDTH; j++) {
+                if (p_pattern[j] & mask) {
+                    wk_colour = colour;
+                } else {
+                    wk_colour = background_colour;
+                }
+                for (fw = 0; fw < font_size; fw++) {
+                    for (k = (pixel_num - 1); k >= 0; k--) {
+                        p_text_field[wk_idx++] = (uint8_t)(wk_colour >> (8 * k));
+                    }
+                }
+            }
+            idx_y++;
+        }
+        mask = (uint8_t)(mask >> 1);
+    }
+    return true;
+}
+