| 1 | /*␊ |
| 2 | * libeg/text.c␊ |
| 3 | * Text drawing functions␊ |
| 4 | *␊ |
| 5 | * Copyright (c) 2006 Christoph Pfisterer␊ |
| 6 | * All rights reserved.␊ |
| 7 | *␊ |
| 8 | * Redistribution and use in source and binary forms, with or without␊ |
| 9 | * modification, are permitted provided that the following conditions are␊ |
| 10 | * met:␊ |
| 11 | *␊ |
| 12 | * * Redistributions of source code must retain the above copyright␊ |
| 13 | * notice, this list of conditions and the following disclaimer.␊ |
| 14 | *␊ |
| 15 | * * Redistributions in binary form must reproduce the above copyright␊ |
| 16 | * notice, this list of conditions and the following disclaimer in the␊ |
| 17 | * documentation and/or other materials provided with the␊ |
| 18 | * distribution.␊ |
| 19 | *␊ |
| 20 | * * Neither the name of Christoph Pfisterer nor the names of the␊ |
| 21 | * contributors may be used to endorse or promote products derived␊ |
| 22 | * from this software without specific prior written permission.␊ |
| 23 | *␊ |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS␊ |
| 25 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT␊ |
| 26 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR␊ |
| 27 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT␊ |
| 28 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,␊ |
| 29 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT␊ |
| 30 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,␊ |
| 31 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY␊ |
| 32 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT␊ |
| 33 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE␊ |
| 34 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.␊ |
| 35 | */␊ |
| 36 | ␊ |
| 37 | #include <utarray.h>␊ |
| 38 | #include "libegint.h"␊ |
| 39 | ␊ |
| 40 | #include "egemb_font.h"␊ |
| 41 | #define FONT_CELL_WIDTH (7)␊ |
| 42 | #define FONT_CELL_HEIGHT (12)␊ |
| 43 | ␊ |
| 44 | static EG_IMAGE *FontImage = NULL;␊ |
| 45 | ␊ |
| 46 | ␊ |
| 47 | //␊ |
| 48 | // Text rendering␊ |
| 49 | //␊ |
| 50 | ␊ |
| 51 | VOID egMeasureText(IN CHAR16 *Text, OUT UINTN *Width, OUT UINTN *Height)␊ |
| 52 | {␊ |
| 53 | if (Width != NULL)␊ |
| 54 | *Width = StrLen(Text) * FONT_CELL_WIDTH;␊ |
| 55 | if (Height != NULL)␊ |
| 56 | *Height = FONT_CELL_HEIGHT;␊ |
| 57 | }␊ |
| 58 | ␊ |
| 59 | VOID egRenderText(IN CHAR16 *Text, IN OUT EG_IMAGE *CompImage, IN UINTN PosX, IN UINTN PosY)␊ |
| 60 | {␊ |
| 61 | EG_PIXEL *BufferPtr;␊ |
| 62 | EG_PIXEL *FontPixelData;␊ |
| 63 | UINTN BufferLineOffset, FontLineOffset;␊ |
| 64 | UINTN TextLength;␊ |
| 65 | UINTN i, c;␊ |
| 66 | ␊ |
| 67 | // clip the text␊ |
| 68 | TextLength = StrLen(Text);␊ |
| 69 | if (TextLength * FONT_CELL_WIDTH + PosX > CompImage->Width)␊ |
| 70 | TextLength = (CompImage->Width - PosX) / FONT_CELL_WIDTH;␊ |
| 71 | ␊ |
| 72 | // load the font␊ |
| 73 | if (FontImage == NULL)␊ |
| 74 | FontImage = egPrepareEmbeddedImage(&egemb_font, TRUE);␊ |
| 75 | ␊ |
| 76 | // render it␊ |
| 77 | BufferPtr = CompImage->PixelData;␊ |
| 78 | BufferLineOffset = CompImage->Width;␊ |
| 79 | BufferPtr += PosX + PosY * BufferLineOffset;␊ |
| 80 | FontPixelData = FontImage->PixelData;␊ |
| 81 | FontLineOffset = FontImage->Width;␊ |
| 82 | for (i = 0; i < TextLength; i++) {␊ |
| 83 | c = Text[i];␊ |
| 84 | if (c < 32 || c >= 127)␊ |
| 85 | c = 95;␊ |
| 86 | else␊ |
| 87 | c -= 32;␊ |
| 88 | egRawCompose(BufferPtr, FontPixelData + c * FONT_CELL_WIDTH,␊ |
| 89 | FONT_CELL_WIDTH, FONT_CELL_HEIGHT,␊ |
| 90 | BufferLineOffset, FontLineOffset);␊ |
| 91 | BufferPtr += FONT_CELL_WIDTH;␊ |
| 92 | }␊ |
| 93 | }␊ |
| 94 | ␊ |
| 95 | /* EOF */␊ |
| 96 | |
