qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
Log | Files | Refs | Submodules | LICENSE

next-fb.c (4243B)

      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)