The Android Open Source Project | c24a8e6 | 2009-03-03 19:28:42 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <stdlib.h> |
| 18 | #include <unistd.h> |
| 19 | |
| 20 | #include <fcntl.h> |
| 21 | #include <stdio.h> |
| 22 | |
| 23 | #include <sys/ioctl.h> |
| 24 | #include <sys/mman.h> |
| 25 | #include <sys/types.h> |
| 26 | |
| 27 | #include <linux/fb.h> |
| 28 | #include <linux/kd.h> |
| 29 | |
| 30 | #include <pixelflinger/pixelflinger.h> |
| 31 | |
| 32 | #include "minui.h" |
| 33 | |
| 34 | // File signature for BMP files. |
| 35 | // The letters 'BM' as a little-endian unsigned short. |
| 36 | |
| 37 | #define BMP_SIGNATURE 0x4d42 |
| 38 | |
| 39 | typedef struct { |
| 40 | // constant, value should equal BMP_SIGNATURE |
| 41 | unsigned short bfType; |
| 42 | // size of the file in bytes. |
| 43 | unsigned long bfSize; |
| 44 | // must always be set to zero. |
| 45 | unsigned short bfReserved1; |
| 46 | // must always be set to zero. |
| 47 | unsigned short bfReserved2; |
| 48 | // offset from the beginning of the file to the bitmap data. |
| 49 | unsigned long bfOffBits; |
| 50 | |
| 51 | // The BITMAPINFOHEADER: |
| 52 | // size of the BITMAPINFOHEADER structure, in bytes. |
| 53 | unsigned long biSize; |
| 54 | // width of the image, in pixels. |
| 55 | unsigned long biWidth; |
| 56 | // height of the image, in pixels. |
| 57 | unsigned long biHeight; |
| 58 | // number of planes of the target device, must be set to 1. |
| 59 | unsigned short biPlanes; |
| 60 | // number of bits per pixel. |
| 61 | unsigned short biBitCount; |
| 62 | // type of compression, zero means no compression. |
| 63 | unsigned long biCompression; |
| 64 | // size of the image data, in bytes. If there is no compression, |
| 65 | // it is valid to set this member to zero. |
| 66 | unsigned long biSizeImage; |
| 67 | // horizontal pixels per meter on the designated targer device, |
| 68 | // usually set to zero. |
| 69 | unsigned long biXPelsPerMeter; |
| 70 | // vertical pixels per meter on the designated targer device, |
| 71 | // usually set to zero. |
| 72 | unsigned long biYPelsPerMeter; |
| 73 | // number of colors used in the bitmap, if set to zero the |
| 74 | // number of colors is calculated using the biBitCount member. |
| 75 | unsigned long biClrUsed; |
| 76 | // number of color that are 'important' for the bitmap, |
| 77 | // if set to zero, all colors are important. |
| 78 | unsigned long biClrImportant; |
| 79 | } __attribute__((packed)) BitMapFileHeader; |
| 80 | |
| 81 | int res_create_surface(const char* name, gr_surface* pSurface) { |
| 82 | char resPath[256]; |
| 83 | BitMapFileHeader header; |
| 84 | GGLSurface* surface = NULL; |
| 85 | int result = 0; |
| 86 | |
| 87 | snprintf(resPath, sizeof(resPath)-1, "/res/images/%s.bmp", name); |
| 88 | resPath[sizeof(resPath)-1] = '\0'; |
| 89 | int fd = open(resPath, O_RDONLY); |
| 90 | if (fd == -1) { |
| 91 | result = -1; |
| 92 | goto exit; |
| 93 | } |
| 94 | size_t bytesRead = read(fd, &header, sizeof(header)); |
| 95 | if (bytesRead != sizeof(header)) { |
| 96 | result = -2; |
| 97 | goto exit; |
| 98 | } |
| 99 | if (header.bfType != BMP_SIGNATURE) { |
| 100 | result = -3; // Not a legal header |
| 101 | goto exit; |
| 102 | } |
| 103 | if (header.biPlanes != 1) { |
| 104 | result = -4; |
| 105 | goto exit; |
| 106 | } |
| 107 | if (!(header.biBitCount == 24 || header.biBitCount == 32)) { |
| 108 | result = -5; |
| 109 | goto exit; |
| 110 | } |
| 111 | if (header.biCompression != 0) { |
| 112 | result = -6; |
| 113 | goto exit; |
| 114 | } |
| 115 | size_t width = header.biWidth; |
| 116 | size_t height = header.biHeight; |
| 117 | size_t stride = 4 * width; |
| 118 | size_t pixelSize = stride * height; |
| 119 | |
| 120 | surface = malloc(sizeof(GGLSurface) + pixelSize); |
| 121 | if (surface == NULL) { |
| 122 | result = -7; |
| 123 | goto exit; |
| 124 | } |
| 125 | unsigned char* pData = (unsigned char*) (surface + 1); |
| 126 | surface->version = sizeof(GGLSurface); |
| 127 | surface->width = width; |
| 128 | surface->height = height; |
| 129 | surface->stride = width; /* Yes, pixels, not bytes */ |
| 130 | surface->data = pData; |
| 131 | surface->format = (header.biBitCount == 24) ? |
| 132 | GGL_PIXEL_FORMAT_RGBX_8888 : GGL_PIXEL_FORMAT_RGBA_8888; |
| 133 | |
| 134 | // Source pixel bytes are stored B G R {A} |
| 135 | |
| 136 | lseek(fd, header.bfOffBits, SEEK_SET); |
| 137 | size_t y; |
| 138 | if (header.biBitCount == 24) { // RGB |
| 139 | size_t inputStride = (((3 * width + 3) >> 2) << 2); |
| 140 | for (y = 0; y < height; y++) { |
| 141 | unsigned char* pRow = pData + (height - (y + 1)) * stride; |
| 142 | bytesRead = read(fd, pRow, inputStride); |
| 143 | if (bytesRead != inputStride) { |
| 144 | result = -8; |
| 145 | goto exit; |
| 146 | } |
| 147 | int x; |
| 148 | for(x = width - 1; x >= 0; x--) { |
| 149 | int sx = x * 3; |
| 150 | int dx = x * 4; |
| 151 | unsigned char b = pRow[sx]; |
| 152 | unsigned char g = pRow[sx + 1]; |
| 153 | unsigned char r = pRow[sx + 2]; |
| 154 | unsigned char a = 0xff; |
| 155 | pRow[dx ] = r; // r |
| 156 | pRow[dx + 1] = g; // g |
| 157 | pRow[dx + 2] = b; // b; |
| 158 | pRow[dx + 3] = a; |
| 159 | } |
| 160 | } |
| 161 | } else { // RGBA |
| 162 | for (y = 0; y < height; y++) { |
| 163 | unsigned char* pRow = pData + (height - (y + 1)) * stride; |
| 164 | bytesRead = read(fd, pRow, stride); |
| 165 | if (bytesRead != stride) { |
| 166 | result = -9; |
| 167 | goto exit; |
| 168 | } |
| 169 | size_t x; |
| 170 | for(x = 0; x < width; x++) { |
| 171 | size_t xx = x * 4; |
| 172 | unsigned char b = pRow[xx]; |
| 173 | unsigned char g = pRow[xx + 1]; |
| 174 | unsigned char r = pRow[xx + 2]; |
| 175 | unsigned char a = pRow[xx + 3]; |
| 176 | pRow[xx ] = r; |
| 177 | pRow[xx + 1] = g; |
| 178 | pRow[xx + 2] = b; |
| 179 | pRow[xx + 3] = a; |
| 180 | } |
| 181 | } |
| 182 | } |
| 183 | *pSurface = (gr_surface) surface; |
| 184 | |
| 185 | exit: |
| 186 | if (fd >= 0) { |
| 187 | close(fd); |
| 188 | } |
| 189 | if (result < 0) { |
| 190 | if (surface) { |
| 191 | free(surface); |
| 192 | } |
| 193 | } |
| 194 | return result; |
| 195 | } |
| 196 | |
| 197 | void res_free_surface(gr_surface surface) { |
| 198 | GGLSurface* pSurface = (GGLSurface*) surface; |
| 199 | if (pSurface) { |
| 200 | free(pSurface); |
| 201 | } |
| 202 | } |