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 #include "qom/object.h"
  34
  35 typedef struct NeXTFbState NeXTFbState;
  36 DECLARE_INSTANCE_CHECKER(NeXTFbState, NEXTFB,
  37                          TYPE_NEXTFB)
  38
  39 struct NeXTFbState {
  40     SysBusDevice parent_obj;
  41
  42     MemoryRegion fb_mr;
  43     MemoryRegionSection fbsection;
  44     QemuConsole *con;
  45
  46     uint32_t cols;
  47     uint32_t rows;
  48     int invalidate;
  49 };
  50
  51 static void nextfb_draw_line(void *opaque, uint8_t *d, const uint8_t *s,
  52                              int width, int pitch)
  53 {
  54     NeXTFbState *nfbstate = NEXTFB(opaque);
  55     static const uint32_t pal[4] = {
  56         0xFFFFFFFF, 0xFFAAAAAA, 0xFF555555, 0xFF000000
  57     };
  58     uint32_t *buf = (uint32_t *)d;
  59     int i = 0;
  60
  61     for (i = 0; i < nfbstate->cols / 4; i++) {
  62         int j = i * 4;
  63         uint8_t src = s[i];
  64         buf[j + 3] = pal[src & 0x3];
  65         src >>= 2;
  66         buf[j + 2] = pal[src & 0x3];
  67         src >>= 2;
  68         buf[j + 1] = pal[src & 0x3];
  69         src >>= 2;
  70         buf[j + 0] = pal[src & 0x3];
  71     }
  72 }
  73
  74 static void nextfb_update(void *opaque)
  75 {
  76     NeXTFbState *s = NEXTFB(opaque);
  77     int dest_width = 4;
  78     int src_width;
  79     int first = 0;
  80     int last  = 0;
  81     DisplaySurface *surface = qemu_console_surface(s->con);
  82
  83     src_width = s->cols / 4 + 8;
  84     dest_width = s->cols * 4;
  85
  86     if (s->invalidate) {
  87         framebuffer_update_memory_section(&s->fbsection, &s->fb_mr, 0,
  88                                           s->cols, src_width);
  89         s->invalidate = 0;
  90     }
  91
  92     framebuffer_update_display(surface, &s->fbsection, s->cols, s->rows,
  93                                src_width, dest_width, 0, 1, nextfb_draw_line,
  94                                s, &first, &last);
  95
  96     dpy_gfx_update(s->con, 0, 0, s->cols, s->rows);
  97 }
  98
  99 static void nextfb_invalidate(void *opaque)
 100 {
 101     NeXTFbState *s = NEXTFB(opaque);
 102     s->invalidate = 1;
 103 }
 104
 105 static const GraphicHwOps nextfb_ops = {
 106     .invalidate  = nextfb_invalidate,
 107     .gfx_update  = nextfb_update,
 108 };
 109
 110 static void nextfb_realize(DeviceState *dev, Error **errp)
 111 {
 112     NeXTFbState *s = NEXTFB(dev);
 113
 114     memory_region_init_ram(&s->fb_mr, OBJECT(dev), "next-video", 0x1CB100,
 115                            &error_fatal);
 116     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->fb_mr);
 117
 118     s->invalidate = 1;
 119     s->cols = 1120;
 120     s->rows = 832;
 121
 122     s->con = graphic_console_init(dev, 0, &nextfb_ops, s);
 123     qemu_console_resize(s->con, s->cols, s->rows);
 124 }
 125
 126 static void nextfb_class_init(ObjectClass *oc, void *data)
 127 {
 128     DeviceClass *dc = DEVICE_CLASS(oc);
 129
 130     set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
 131     dc->realize = nextfb_realize;
 132
 133     /* Note: This device does not any state that we have to reset or migrate */
 134 }
 135
 136 static const TypeInfo nextfb_info = {
 137     .name          = TYPE_NEXTFB,
 138     .parent        = TYPE_SYS_BUS_DEVICE,
 139     .instance_size = sizeof(NeXTFbState),
 140     .class_init    = nextfb_class_init,
 141 };
 142
 143 static void nextfb_register_types(void)
 144 {
 145     type_register_static(&nextfb_info);
 146 }
 147
 148 type_init(nextfb_register_types)