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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 "../refind/global.h"
#include "egemb_font.h"
#include "egemb_font_large.h"
#define FONT_NUM_CHARS 96
static EG_IMAGE *BaseFontImage = NULL;
static EG_IMAGE *DarkFontImage = NULL;
static EG_IMAGE *LightFontImage = NULL;
static UINTN FontCellWidth = 7;
//
// Text rendering
//
static VOID egPrepareFont() {
UINTN UGAWidth, UGAHeight;
egGetScreenSize(&UGAWidth, &UGAHeight);
if (BaseFontImage == NULL) {
if (UGAWidth >= HIDPI_MIN)
BaseFontImage = egPrepareEmbeddedImage(&egemb_font_large, TRUE);
else
BaseFontImage = egPrepareEmbeddedImage(&egemb_font, TRUE);
}
if (BaseFontImage != NULL)
FontCellWidth = BaseFontImage->Width / FONT_NUM_CHARS;
} // VOID egPrepareFont();
UINTN egGetFontHeight(VOID) {
egPrepareFont();
return BaseFontImage->Height;
} // UINTN egGetFontHeight()
UINTN egGetFontCellWidth(VOID) {
return FontCellWidth;
}
UINTN egComputeTextWidth(IN CHAR16 *Text) {
UINTN Width = 0;
egPrepareFont();
if (Text != NULL)
Width = FontCellWidth * StrLen(Text);
return Width;
} // UINTN egComputeTextWidth()
VOID egMeasureText(IN CHAR16 *Text, OUT UINTN *Width, OUT UINTN *Height) {
egPrepareFont();
if (Width != NULL)
*Width = StrLen(Text) * FontCellWidth;
if (Height != NULL)
*Height = BaseFontImage->Height;
}
VOID egRenderText(IN CHAR16 *Text, IN OUT EG_IMAGE *CompImage, IN UINTN PosX, IN UINTN PosY, IN UINT8 BGBrightness)
{
EG_IMAGE *FontImage;
EG_PIXEL *BufferPtr;
EG_PIXEL *FontPixelData;
UINTN BufferLineOffset, FontLineOffset;
UINTN TextLength;
UINTN i, c;
egPrepareFont();
// clip the text
if (Text)
TextLength = StrLen(Text);
else
TextLength = 0;
if (TextLength * FontCellWidth + PosX > CompImage->Width)
TextLength = (CompImage->Width - PosX) / FontCellWidth;
if (BGBrightness < 128) {
if (LightFontImage == NULL) {
LightFontImage = egCopyImage(BaseFontImage);
if (LightFontImage == NULL)
return;
for (i = 0; i < (LightFontImage->Width * LightFontImage->Height); i++) {
LightFontImage->PixelData[i].r = 255 - LightFontImage->PixelData[i].r;
LightFontImage->PixelData[i].g = 255 - LightFontImage->PixelData[i].g;
LightFontImage->PixelData[i].b = 255 - LightFontImage->PixelData[i].b;
} // for
} // if
FontImage = LightFontImage;
} else {
if (DarkFontImage == NULL)
DarkFontImage = egCopyImage(BaseFontImage);
if (DarkFontImage == NULL)
return;
FontImage = DarkFontImage;
} // if/else
// 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 * FontCellWidth,
FontCellWidth, FontImage->Height,
BufferLineOffset, FontLineOffset);
BufferPtr += FontCellWidth;
}
}
// Load a font bitmap from the specified file
VOID egLoadFont(IN CHAR16 *Filename) {
if (BaseFontImage)
egFreeImage(BaseFontImage);
BaseFontImage = egLoadImage(SelfDir, Filename, TRUE);
if (BaseFontImage == NULL)
Print(L"Note: Font image file %s is invalid! Using default font!\n");
egPrepareFont();
} // BOOLEAN egLoadFont()
/* EOF */
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