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
  33 OBJECT_DECLARE_SIMPLE_TYPE(NeXTFbState, NEXTFB)
  34
  35 struct 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
  47 static 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
  70 static 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
  95 static void nextfb_invalidate(void *opaque)
  96 {
  97     NeXTFbState *s = NEXTFB(opaque);
  98     s->invalidate = 1;
  99 }
 100
 101 static const GraphicHwOps nextfb_ops = {
 102     .invalidate  = nextfb_invalidate,
 103     .gfx_update  = nextfb_update,
 104 };
 105
 106 static 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
 122 static 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
 132 static 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
 139 static void nextfb_register_types(void)
 140 {
 141     type_register_static(&nextfb_info);
 142 }
 143
 144 type_init(nextfb_register_types)