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/hw.h"
  28 #include "hw/boards.h"
  29 #include "hw/loader.h"
  30 #include "framebuffer.h"
  31 #include "ui/pixel_ops.h"
  32 #include "hw/m68k/next-cube.h"
  33
  34 #define NEXTFB(obj) OBJECT_CHECK(NeXTFbState, (obj), TYPE_NEXTFB)
  35
  36 struct NeXTFbState {
  37     SysBusDevice parent_obj;
  38
  39     MemoryRegion fb_mr;
  40     MemoryRegionSection fbsection;
  41     QemuConsole *con;
  42
  43     uint32_t cols;
  44     uint32_t rows;
  45     int invalidate;
  46 };
  47 typedef struct NeXTFbState NeXTFbState;
  48
  49 static void nextfb_draw_line(void *opaque, uint8_t *d, const uint8_t *s,
  50                              int width, int pitch)
  51 {
  52     NeXTFbState *nfbstate = NEXTFB(opaque);
  53     static const uint32_t pal[4] = {
  54         0xFFFFFFFF, 0xFFAAAAAA, 0xFF555555, 0xFF000000
  55     };
  56     uint32_t *buf = (uint32_t *)d;
  57     int i = 0;
  58
  59     for (i = 0; i < nfbstate->cols / 4; i++) {
  60         int j = i * 4;
  61         uint8_t src = s[i];
  62         buf[j + 3] = pal[src & 0x3];
  63         src >>= 2;
  64         buf[j + 2] = pal[src & 0x3];
  65         src >>= 2;
  66         buf[j + 1] = pal[src & 0x3];
  67         src >>= 2;
  68         buf[j + 0] = pal[src & 0x3];
  69     }
  70 }
  71
  72 static void nextfb_update(void *opaque)
  73 {
  74     NeXTFbState *s = NEXTFB(opaque);
  75     int dest_width = 4;
  76     int src_width;
  77     int first = 0;
  78     int last  = 0;
  79     DisplaySurface *surface = qemu_console_surface(s->con);
  80
  81     src_width = s->cols / 4 + 8;
  82     dest_width = s->cols * 4;
  83
  84     if (s->invalidate) {
  85         framebuffer_update_memory_section(&s->fbsection, &s->fb_mr, 0,
  86                                           s->cols, src_width);
  87         s->invalidate = 0;
  88     }
  89
  90     framebuffer_update_display(surface, &s->fbsection, s->cols, s->rows,
  91                                src_width, dest_width, 0, 1, nextfb_draw_line,
  92                                s, &first, &last);
  93
  94     dpy_gfx_update(s->con, 0, 0, s->cols, s->rows);
  95 }
  96
  97 static void nextfb_invalidate(void *opaque)
  98 {
  99     NeXTFbState *s = NEXTFB(opaque);
 100     s->invalidate = 1;
 101 }
 102
 103 static const GraphicHwOps nextfb_ops = {
 104     .invalidate  = nextfb_invalidate,
 105     .gfx_update  = nextfb_update,
 106 };
 107
 108 static void nextfb_realize(DeviceState *dev, Error **errp)
 109 {
 110     NeXTFbState *s = NEXTFB(dev);
 111
 112     memory_region_init_ram(&s->fb_mr, OBJECT(dev), "next-video", 0x1CB100,
 113                            &error_fatal);
 114     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->fb_mr);
 115
 116     s->invalidate = 1;
 117     s->cols = 1120;
 118     s->rows = 832;
 119
 120     s->con = graphic_console_init(dev, 0, &nextfb_ops, s);
 121     qemu_console_resize(s->con, s->cols, s->rows);
 122 }
 123
 124 static void nextfb_class_init(ObjectClass *oc, void *data)
 125 {
 126     DeviceClass *dc = DEVICE_CLASS(oc);
 127
 128     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 129     dc->realize = nextfb_realize;
 130
 131     /* Note: This device does not any state that we have to reset or migrate */
 132 }
 133
 134 static const TypeInfo nextfb_info = {
 135     .name          = TYPE_NEXTFB,
 136     .parent        = TYPE_SYS_BUS_DEVICE,
 137     .instance_size = sizeof(NeXTFbState),
 138     .class_init    = nextfb_class_init,
 139 };
 140
 141 static void nextfb_register_types(void)
 142 {
 143     type_register_static(&nextfb_info);
 144 }
 145
 146 type_init(nextfb_register_types)