boot: efi - split graphics and splash handling

1 files changed, 322 insertions, 0 deletions

diff --git a/src/boot/efi/splash.c b/src/boot/efi/splash.c
new file mode 100644
index 0000000000..3f2aa27ddd
--- /dev/null
+++ b/src/boot/efi/splash.c
@@ -0,0 +1,322 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * Copyright (C) 2012-2013 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2012 Harald Hoyer <harald@redhat.com>
+ */
+
+#include <efi.h>
+#include <efilib.h>
+
+#include "util.h"
+#include "splash.h"
+
+struct bmp_file {
+        CHAR8 signature[2];
+        UINT32 size;
+        UINT16 reserved[2];
+        UINT32 offset;
+} __attribute__((packed));
+
+/* we require at least BITMAPINFOHEADER, later versions are
+   accepted, but their features ignored */
+struct bmp_dib {
+        UINT32 size;
+        UINT32 x;
+        UINT32 y;
+        UINT16 planes;
+        UINT16 depth;
+        UINT32 compression;
+        UINT32 image_size;
+        INT32 x_pixel_meter;
+        INT32 y_pixel_meter;
+        UINT32 colors_used;
+        UINT32 colors_important;
+} __attribute__((packed));
+
+struct bmp_map {
+        UINT8 blue;
+        UINT8 green;
+        UINT8 red;
+        UINT8 reserved;
+} __attribute__((packed));
+
+EFI_STATUS bmp_parse_header(UINT8 *bmp, UINTN size, struct bmp_dib **ret_dib,
+                            struct bmp_map **ret_map, UINT8 **pixmap) {
+        struct bmp_file *file;
+        struct bmp_dib *dib;
+        struct bmp_map *map;
+        UINTN row_size;
+
+        if (size < sizeof(struct bmp_file) + sizeof(struct bmp_dib))
+                return EFI_INVALID_PARAMETER;
+
+        /* check file header */
+        file = (struct bmp_file *)bmp;
+        if (file->signature[0] != 'B' || file->signature[1] != 'M')
+                return EFI_INVALID_PARAMETER;
+        if (file->size != size)
+                return EFI_INVALID_PARAMETER;
+        if (file->size < file->offset)
+                return EFI_INVALID_PARAMETER;
+
+        /*  check device-independent bitmap */
+        dib = (struct bmp_dib *)(bmp + sizeof(struct bmp_file));
+        if (dib->size < sizeof(struct bmp_dib))
+                return EFI_UNSUPPORTED;
+
+        switch (dib->depth) {
+        case 1:
+        case 4:
+        case 8:
+        case 24:
+                if (dib->compression != 0)
+                        return EFI_UNSUPPORTED;
+
+                break;
+
+        case 16:
+        case 32:
+                if (dib->compression != 0 && dib->compression != 3)
+                        return EFI_UNSUPPORTED;
+
+                break;
+
+        default:
+                return EFI_UNSUPPORTED;
+        }
+
+        row_size = (((dib->depth * dib->x) + 31) / 32) * 4;
+        if (file->size - file->offset <  dib->y * row_size)
+                return EFI_INVALID_PARAMETER;
+        if (row_size * dib->y > 64 * 1024 * 1024)
+                return EFI_INVALID_PARAMETER;
+
+        /* check color table */
+        map = (struct bmp_map *)(bmp + sizeof(struct bmp_file) + dib->size);
+        if (file->offset < sizeof(struct bmp_file) + dib->size)
+                return EFI_INVALID_PARAMETER;
+
+        if (file->offset > sizeof(struct bmp_file) + dib->size) {
+                UINT32 map_count;
+                UINTN map_size;
+
+                if (dib->colors_used)
+                        map_count = dib->colors_used;
+                else {
+                        switch (dib->depth) {
+                        case 1:
+                        case 4:
+                        case 8:
+                                map_count = 1 << dib->depth;
+                                break;
+
+                        default:
+                                map_count = 0;
+                                break;
+                        }
+                }
+
+                map_size = file->offset - (sizeof(struct bmp_file) + dib->size);
+                if (map_size != sizeof(struct bmp_map) * map_count)
+                        return EFI_INVALID_PARAMETER;
+        }
+
+        *ret_map = map;
+        *ret_dib = dib;
+        *pixmap = bmp + file->offset;
+
+        return EFI_SUCCESS;
+}
+
+static VOID pixel_blend(UINT32 *dst, const UINT32 source) {
+        UINT32 alpha, src, src_rb, src_g, dst_rb, dst_g, rb, g;
+
+        alpha = (source & 0xff);
+
+        /* convert src from RGBA to XRGB */
+        src = source >> 8;
+
+        /* decompose into RB and G components */
+        src_rb = (src & 0xff00ff);
+        src_g  = (src & 0x00ff00);
+
+        dst_rb = (*dst & 0xff00ff);
+        dst_g  = (*dst & 0x00ff00);
+
+        /* blend */
+        rb = ((((src_rb - dst_rb) * alpha + 0x800080) >> 8) + dst_rb) & 0xff00ff;
+        g  = ((((src_g  -  dst_g) * alpha + 0x008000) >> 8) +  dst_g) & 0x00ff00;
+
+        *dst = (rb | g);
+}
+
+EFI_STATUS bmp_to_blt(EFI_GRAPHICS_OUTPUT_BLT_PIXEL *buf,
+                      struct bmp_dib *dib, struct bmp_map *map,
+                      UINT8 *pixmap) {
+        UINT8 *in;
+        UINTN y;
+
+        /* transform and copy pixels */
+        in = pixmap;
+        for (y = 0; y < dib->y; y++) {
+                EFI_GRAPHICS_OUTPUT_BLT_PIXEL *out;
+                UINTN row_size;
+                UINTN x;
+
+                out = &buf[(dib->y - y - 1) * dib->x];
+                for (x = 0; x < dib->x; x++, in++, out++) {
+                        switch (dib->depth) {
+                        case 1: {
+                                UINTN i;
+
+                                for (i = 0; i < 8 && x < dib->x; i++) {
+                                        out->Red = map[((*in) >> (7 - i)) & 1].red;
+                                        out->Green = map[((*in) >> (7 - i)) & 1].green;
+                                        out->Blue = map[((*in) >> (7 - i)) & 1].blue;
+                                        out++;
+                                        x++;
+                                }
+                                out--;
+                                x--;
+                                break;
+                        }
+
+                        case 4: {
+                                UINTN i;
+
+                                i = (*in) >> 4;
+                                out->Red = map[i].red;
+                                out->Green = map[i].green;
+                                out->Blue = map[i].blue;
+                                if (x < (dib->x - 1)) {
+                                        out++;
+                                        x++;
+                                        i = (*in) & 0x0f;
+                                        out->Red = map[i].red;
+                                        out->Green = map[i].green;
+                                        out->Blue = map[i].blue;
+                                }
+                                break;
+                        }
+
+                        case 8:
+                                out->Red = map[*in].red;
+                                out->Green = map[*in].green;
+                                out->Blue = map[*in].blue;
+                                break;
+
+                        case 16: {
+                                UINT16 i = *(UINT16 *) in;
+
+                                out->Red = (i & 0x7c00) >> 7;
+                                out->Green = (i & 0x3e0) >> 2;
+                                out->Blue = (i & 0x1f) << 3;
+                                in += 1;
+                                break;
+                        }
+
+                        case 24:
+                                out->Red = in[2];
+                                out->Green = in[1];
+                                out->Blue = in[0];
+                                in += 2;
+                                break;
+
+                        case 32: {
+                                UINT32 i = *(UINT32 *) in;
+
+                                pixel_blend((UINT32 *)out, i);
+
+                                in += 3;
+                                break;
+                        }
+                        }
+                }
+
+                /* add row padding; new lines always start at 32 bit boundary */
+                row_size = in - pixmap;
+                in += ((row_size + 3) & ~3) - row_size;
+        }
+
+        return EFI_SUCCESS;
+}
+
+EFI_STATUS graphics_splash(UINT8 *content, UINTN len, const EFI_GRAPHICS_OUTPUT_BLT_PIXEL *background) {
+        EFI_GRAPHICS_OUTPUT_BLT_PIXEL pixel = {};
+        EFI_GUID GraphicsOutputProtocolGuid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
+        EFI_GRAPHICS_OUTPUT_PROTOCOL *GraphicsOutput = NULL;
+        struct bmp_dib *dib;
+        struct bmp_map *map;
+        UINT8 *pixmap;
+        UINT64 blt_size;
+        VOID *blt = NULL;
+        UINTN x_pos = 0;
+        UINTN y_pos = 0;
+        EFI_STATUS err;
+
+        if (!background) {
+                if (StriCmp(L"Apple", ST->FirmwareVendor) == 0) {
+                        pixel.Red = 0xc0;
+                        pixel.Green = 0xc0;
+                        pixel.Blue = 0xc0;
+                }
+                background = &pixel;
+        }
+
+        err = LibLocateProtocol(&GraphicsOutputProtocolGuid, (VOID **)&GraphicsOutput);
+        if (EFI_ERROR(err))
+                return err;
+
+        err = bmp_parse_header(content, len, &dib, &map, &pixmap);
+        if (EFI_ERROR(err))
+                goto err;
+
+        if(dib->x < GraphicsOutput->Mode->Info->HorizontalResolution)
+                x_pos = (GraphicsOutput->Mode->Info->HorizontalResolution - dib->x) / 2;
+        if(dib->y < GraphicsOutput->Mode->Info->VerticalResolution)
+                y_pos = (GraphicsOutput->Mode->Info->VerticalResolution - dib->y) / 2;
+
+        uefi_call_wrapper(GraphicsOutput->Blt, 10, GraphicsOutput,
+                          (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *)background,
+                          EfiBltVideoFill, 0, 0, 0, 0,
+                          GraphicsOutput->Mode->Info->HorizontalResolution,
+                          GraphicsOutput->Mode->Info->VerticalResolution, 0);
+
+        /* EFI buffer */
+        blt_size = dib->x * dib->y * sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL);
+        blt = AllocatePool(blt_size);
+        if (!blt)
+                return EFI_OUT_OF_RESOURCES;
+
+        err = uefi_call_wrapper(GraphicsOutput->Blt, 10, GraphicsOutput,
+                                blt, EfiBltVideoToBltBuffer, x_pos, y_pos, 0, 0,
+                                dib->x, dib->y, 0);
+        if (EFI_ERROR(err))
+                goto err;
+
+        err = bmp_to_blt(blt, dib, map, pixmap);
+        if (EFI_ERROR(err))
+                goto err;
+
+        err = graphics_mode(TRUE);
+        if (EFI_ERROR(err))
+                goto err;
+
+        err = uefi_call_wrapper(GraphicsOutput->Blt, 10, GraphicsOutput,
+                                blt, EfiBltBufferToVideo, 0, 0, x_pos, y_pos,
+                                dib->x, dib->y, 0);
+err:
+        FreePool(blt);
+        return err;
+}