X-Git-Url: https://code.delx.au/refind/blobdiff_plain/c7fd2c588919ca599aaec9ec9b9d7e6784482b08..e22f7ac1eccb5958dd960e157d0f35606f7db26e:/libeg/text.c

diff --git a/libeg/text.c b/libeg/text.c
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+/*
+ * libeg/text.c
+ * Text drawing functions
+ *
+ * Copyright (c) 2006 Christoph Pfisterer
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the
+ *    distribution.
+ *
+ *  * Neither the name of Christoph Pfisterer nor the names of the
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "libegint.h"
+
+#include "egemb_font.h"
+#define FONT_CELL_WIDTH (7)
+#define FONT_CELL_HEIGHT (12)
+
+static EG_IMAGE *FontImage = NULL;
+
+//
+// Text rendering
+//
+
+VOID egMeasureText(IN CHAR16 *Text, OUT UINTN *Width, OUT UINTN *Height)
+{
+    if (Width != NULL)
+        *Width = StrLen(Text) * FONT_CELL_WIDTH;
+    if (Height != NULL)
+        *Height = FONT_CELL_HEIGHT;
+}
+
+VOID egRenderText(IN CHAR16 *Text, IN OUT EG_IMAGE *CompImage, IN UINTN PosX, IN UINTN PosY)
+{
+    EG_PIXEL        *BufferPtr;
+    EG_PIXEL        *FontPixelData;
+    UINTN           BufferLineOffset, FontLineOffset;
+    UINTN           TextLength;
+    UINTN           i, c;
+    
+    // clip the text
+    TextLength = StrLen(Text);
+    if (TextLength * FONT_CELL_WIDTH + PosX > CompImage->Width)
+        TextLength = (CompImage->Width - PosX) / FONT_CELL_WIDTH;
+
+    // load the font
+    if (FontImage == NULL)
+        FontImage = egPrepareEmbeddedImage(&egemb_font, TRUE);
+    
+    // render it
+    BufferPtr = CompImage->PixelData;
+    BufferLineOffset = CompImage->Width;
+    BufferPtr += PosX + PosY * BufferLineOffset;
+    FontPixelData = FontImage->PixelData;
+    FontLineOffset = FontImage->Width;
+    for (i = 0; i < TextLength; i++) {
+        c = Text[i];
+        if (c < 32 || c >= 127)
+            c = 95;
+        else
+            c -= 32;
+        egRawCompose(BufferPtr, FontPixelData + c * FONT_CELL_WIDTH,
+                     FONT_CELL_WIDTH, FONT_CELL_HEIGHT,
+                     BufferLineOffset, FontLineOffset);
+        BufferPtr += FONT_CELL_WIDTH;
+    }
+}
+
+/* EOF */