LXR qemu/hw/display/next-fb.c

   1/*
   2 * NeXT Cube/Station Framebuffer Emulation
   3 *
   4 * Copyright (c) 2011 Bryce Lanham
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24#include "qemu/osdep.h"
  25#include "qapi/error.h"
  26#include "ui/console.h"
  27#include "hw/loader.h"
  28#include "framebuffer.h"
  29#include "ui/pixel_ops.h"
  30#include "hw/m68k/next-cube.h"
  31#include "qom/object.h"
  32
  33OBJECT_DECLARE_SIMPLE_TYPE(NeXTFbState, NEXTFB)
  34
  35struct NeXTFbState {
  36    SysBusDevice parent_obj;
  37
  38    MemoryRegion fb_mr;
  39    MemoryRegionSection fbsection;
  40    QemuConsole *con;
  41
  42    uint32_t cols;
  43    uint32_t rows;
  44    int invalidate;
  45};
  46
  47static void nextfb_draw_line(void *opaque, uint8_t *d, const uint8_t *s,
  48                             int width, int pitch)
  49{
  50    NeXTFbState *nfbstate = NEXTFB(opaque);
  51    static const uint32_t pal[4] = {
  52        0xFFFFFFFF, 0xFFAAAAAA, 0xFF555555, 0xFF000000
  53    };
  54    uint32_t *buf = (uint32_t *)d;
  55    int i = 0;
  56
  57    for (i = 0; i < nfbstate->cols / 4; i++) {
  58        int j = i * 4;
  59        uint8_t src = s[i];
  60        buf[j + 3] = pal[src & 0x3];
  61        src >>= 2;
  62        buf[j + 2] = pal[src & 0x3];
  63        src >>= 2;
  64        buf[j + 1] = pal[src & 0x3];
  65        src >>= 2;
  66        buf[j + 0] = pal[src & 0x3];
  67    }
  68}
  69
  70static void nextfb_update(void *opaque)
  71{
  72    NeXTFbState *s = NEXTFB(opaque);
  73    int dest_width = 4;
  74    int src_width;
  75    int first = 0;
  76    int last  = 0;
  77    DisplaySurface *surface = qemu_console_surface(s->con);
  78
  79    src_width = s->cols / 4 + 8;
  80    dest_width = s->cols * 4;
  81
  82    if (s->invalidate) {
  83        framebuffer_update_memory_section(&s->fbsection, &s->fb_mr, 0,
  84                                          s->cols, src_width);
  85        s->invalidate = 0;
  86    }
  87
  88    framebuffer_update_display(surface, &s->fbsection, s->cols, s->rows,
  89                               src_width, dest_width, 0, 1, nextfb_draw_line,
  90                               s, &first, &last);
  91
  92    dpy_gfx_update(s->con, 0, 0, s->cols, s->rows);
  93}
  94
  95static void nextfb_invalidate(void *opaque)
  96{
  97    NeXTFbState *s = NEXTFB(opaque);
  98    s->invalidate = 1;
  99}
 100
 101static const GraphicHwOps nextfb_ops = {
 102    .invalidate  = nextfb_invalidate,
 103    .gfx_update  = nextfb_update,
 104};
 105
 106static void nextfb_realize(DeviceState *dev, Error **errp)
 107{
 108    NeXTFbState *s = NEXTFB(dev);
 109
 110    memory_region_init_ram(&s->fb_mr, OBJECT(dev), "next-video", 0x1CB100,
 111                           &error_fatal);
 112    sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->fb_mr);
 113
 114    s->invalidate = 1;
 115    s->cols = 1120;
 116    s->rows = 832;
 117
 118    s->con = graphic_console_init(dev, 0, &nextfb_ops, s);
 119    qemu_console_resize(s->con, s->cols, s->rows);
 120}
 121
 122static void nextfb_class_init(ObjectClass *oc, void *data)
 123{
 124    DeviceClass *dc = DEVICE_CLASS(oc);
 125
 126    set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 127    dc->realize = nextfb_realize;
 128
 129    /* Note: This device does not have any state that we have to reset or migrate */
 130}
 131
 132static const TypeInfo nextfb_info = {
 133    .name          = TYPE_NEXTFB,
 134    .parent        = TYPE_SYS_BUS_DEVICE,
 135    .instance_size = sizeof(NeXTFbState),
 136    .class_init    = nextfb_class_init,
 137};
 138
 139static void nextfb_register_types(void)
 140{
 141    type_register_static(&nextfb_info);
 142}
 143
 144type_init(nextfb_register_types)
 145