Initial Contribution

1 files changed, 202 insertions, 0 deletions

diff --git a/minui/resources.c b/minui/resources.c
new file mode 100644
index 0000000..5beb6a6
--- /dev/null
+++ b/minui/resources.c
@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * 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 <stdlib.h>
+#include <unistd.h>
+
+#include <fcntl.h>
+#include <stdio.h>
+
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+
+#include <linux/fb.h>
+#include <linux/kd.h>
+
+#include <pixelflinger/pixelflinger.h>
+
+#include "minui.h"
+
+// File signature for BMP files.
+// The letters 'BM' as a little-endian unsigned short.
+
+#define BMP_SIGNATURE 0x4d42
+
+typedef struct {
+    // constant, value should equal BMP_SIGNATURE
+    unsigned short  bfType;
+    // size of the file in bytes.
+    unsigned long   bfSize;
+    // must always be set to zero.
+    unsigned short  bfReserved1;
+    // must always be set to zero.
+    unsigned short  bfReserved2;
+    // offset from the beginning of the file to the bitmap data.
+    unsigned long   bfOffBits;
+
+    // The BITMAPINFOHEADER:
+    // size of the BITMAPINFOHEADER structure, in bytes.
+    unsigned long   biSize;
+    // width of the image, in pixels.
+    unsigned long   biWidth;
+    // height of the image, in pixels.
+    unsigned long   biHeight;
+    // number of planes of the target device, must be set to 1.
+    unsigned short  biPlanes;
+    // number of bits per pixel.
+    unsigned short  biBitCount;
+    // type of compression, zero means no compression.
+    unsigned long   biCompression;
+    // size of the image data, in bytes. If there is no compression,
+    // it is valid to set this member to zero.
+    unsigned long   biSizeImage;
+    // horizontal pixels per meter on the designated targer device,
+    // usually set to zero.
+    unsigned long   biXPelsPerMeter;
+    // vertical pixels per meter on the designated targer device,
+    // usually set to zero.
+    unsigned long   biYPelsPerMeter;
+    // number of colors used in the bitmap, if set to zero the
+    // number of colors is calculated using the biBitCount member.
+    unsigned long   biClrUsed;
+    // number of color that are 'important' for the bitmap,
+    // if set to zero, all colors are important.
+    unsigned long   biClrImportant;
+} __attribute__((packed)) BitMapFileHeader;
+
+int res_create_surface(const char* name, gr_surface* pSurface) {
+    char resPath[256];
+    BitMapFileHeader header;
+    GGLSurface* surface = NULL;
+    int result = 0;
+    
+    snprintf(resPath, sizeof(resPath)-1, "/res/images/%s.bmp", name);
+    resPath[sizeof(resPath)-1] = '\0';
+    int fd = open(resPath, O_RDONLY);
+    if (fd == -1) {
+        result = -1;
+        goto exit;
+    }
+    size_t bytesRead = read(fd, &header, sizeof(header));
+    if (bytesRead != sizeof(header)) {
+        result = -2;
+        goto exit;
+    }
+    if (header.bfType != BMP_SIGNATURE) {
+        result = -3; // Not a legal header
+        goto exit;
+    }
+    if (header.biPlanes != 1) {
+        result = -4;
+        goto exit;
+    }
+    if (!(header.biBitCount == 24 || header.biBitCount == 32)) {
+        result = -5;
+        goto exit;
+    }
+    if (header.biCompression != 0) {
+        result = -6;
+        goto exit;
+    }
+    size_t width = header.biWidth;
+    size_t height = header.biHeight;
+    size_t stride = 4 * width;
+    size_t pixelSize = stride * height;
+    
+    surface = malloc(sizeof(GGLSurface) + pixelSize);
+    if (surface == NULL) {
+        result = -7;
+        goto exit;
+    }
+    unsigned char* pData = (unsigned char*) (surface + 1);
+    surface->version = sizeof(GGLSurface);
+    surface->width = width;
+    surface->height = height;
+    surface->stride = width; /* Yes, pixels, not bytes */
+    surface->data = pData;
+    surface->format = (header.biBitCount == 24) ?
+            GGL_PIXEL_FORMAT_RGBX_8888 : GGL_PIXEL_FORMAT_RGBA_8888;
+
+    // Source pixel bytes are stored B G R {A}
+    
+    lseek(fd, header.bfOffBits, SEEK_SET);
+    size_t y;
+    if (header.biBitCount == 24) { // RGB
+        size_t inputStride = (((3 * width + 3) >> 2) << 2);
+        for (y = 0; y < height; y++) {
+            unsigned char* pRow = pData + (height - (y + 1)) * stride;
+            bytesRead = read(fd,  pRow, inputStride);
+            if (bytesRead != inputStride) {
+                result = -8;
+                goto exit;
+            }
+            int x;
+            for(x = width - 1; x >= 0; x--) {
+                int sx = x * 3;
+                int dx = x * 4;
+                unsigned char b = pRow[sx];
+                unsigned char g = pRow[sx + 1];
+                unsigned char r = pRow[sx + 2];
+                unsigned char a = 0xff;
+                pRow[dx    ] = r; // r
+                pRow[dx + 1] = g; // g
+                pRow[dx + 2] = b; // b;
+                pRow[dx + 3] = a;
+            }
+        }
+    } else { // RGBA
+        for (y = 0; y < height; y++) {
+            unsigned char* pRow = pData + (height - (y + 1)) * stride;
+            bytesRead = read(fd,  pRow, stride);
+            if (bytesRead != stride) {
+                result = -9;
+                goto exit;
+            }
+            size_t x;
+            for(x = 0; x < width; x++) {
+                size_t xx = x * 4;
+                unsigned char b = pRow[xx];
+                unsigned char g = pRow[xx + 1];
+                unsigned char r = pRow[xx + 2];
+                unsigned char a = pRow[xx + 3];
+                pRow[xx    ] = r;
+                pRow[xx + 1] = g;
+                pRow[xx + 2] = b;
+                pRow[xx + 3] = a;
+            }
+        }
+    }
+    *pSurface = (gr_surface) surface;
+
+exit:
+    if (fd >= 0) {
+        close(fd);
+    }
+    if (result < 0) {
+        if (surface) {
+            free(surface);
+        }
+    }
+    return result;
+}
+
+void res_free_surface(gr_surface surface) {
+    GGLSurface* pSurface = (GGLSurface*) surface;
+    if (pSurface) {
+        free(pSurface);
+    }
+}