LXR qemu/hw/display/sm501

   1/*
   2 * Pixel drawing function templates for QEMU SM501 Device
   3 *
   4 * Copyright (c) 2008 Shin-ichiro KAWASAKI
   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
  25#if DEPTH == 8
  26#define BPP 1
  27#define PIXEL_TYPE uint8_t
  28#elif DEPTH == 15 || DEPTH == 16
  29#define BPP 2
  30#define PIXEL_TYPE uint16_t
  31#elif DEPTH == 32
  32#define BPP 4
  33#define PIXEL_TYPE uint32_t
  34#else
  35#error unsupport depth
  36#endif
  37
  38#ifdef BGR_FORMAT
  39#define PIXEL_NAME glue(DEPTH, bgr)
  40#else
  41#define PIXEL_NAME DEPTH
  42#endif /* BGR_FORMAT */
  43
  44
  45static void glue(draw_line8_, PIXEL_NAME)(
  46                 uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
  47{
  48    uint8_t v, r, g, b;
  49    do {
  50        v = ldub_p(s);
  51        r = (pal[v] >> 16) & 0xff;
  52        g = (pal[v] >>  8) & 0xff;
  53        b = (pal[v] >>  0) & 0xff;
  54        *(PIXEL_TYPE *)d = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
  55        s++;
  56        d += BPP;
  57    } while (--width != 0);
  58}
  59
  60static void glue(draw_line16_, PIXEL_NAME)(
  61                 uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
  62{
  63    uint16_t rgb565;
  64    uint8_t r, g, b;
  65
  66    do {
  67        rgb565 = lduw_le_p(s);
  68        r = (rgb565 >> 8) & 0xf8;
  69        g = (rgb565 >> 3) & 0xfc;
  70        b = (rgb565 << 3) & 0xf8;
  71        *(PIXEL_TYPE *)d = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
  72        s += 2;
  73        d += BPP;
  74    } while (--width != 0);
  75}
  76
  77static void glue(draw_line32_, PIXEL_NAME)(
  78                 uint8_t *d, const uint8_t *s, int width, const uint32_t *pal)
  79{
  80    uint8_t r, g, b;
  81
  82    do {
  83        r = s[2];
  84        g = s[1];
  85        b = s[0];
  86        *(PIXEL_TYPE *)d = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
  87        s += 4;
  88        d += BPP;
  89    } while (--width != 0);
  90}
  91
  92/**
  93 * Draw hardware cursor image on the given line.
  94 */
  95static void glue(draw_hwc_line_, PIXEL_NAME)(uint8_t *d, const uint8_t *s,
  96                 int width, const uint8_t *palette, int c_x, int c_y)
  97{
  98    int i;
  99    uint8_t r, g, b, v, bitset = 0;
 100
 101    /* get cursor position */
 102    assert(0 <= c_y && c_y < SM501_HWC_HEIGHT);
 103    s += SM501_HWC_WIDTH * c_y / 4;  /* 4 pixels per byte */
 104    d += c_x * BPP;
 105
 106    for (i = 0; i < SM501_HWC_WIDTH && c_x + i < width; i++) {
 107        /* get pixel value */
 108        if (i % 4 == 0) {
 109            bitset = ldub_p(s);
 110            s++;
 111        }
 112        v = bitset & 3;
 113        bitset >>= 2;
 114
 115        /* write pixel */
 116        if (v) {
 117            v--;
 118            r = palette[v * 3 + 0];
 119            g = palette[v * 3 + 1];
 120            b = palette[v * 3 + 2];
 121            *(PIXEL_TYPE *)d = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);
 122        }
 123        d += BPP;
 124    }
 125}
 126
 127#undef DEPTH
 128#undef BPP
 129#undef PIXEL_TYPE
 130#undef PIXEL_NAME
 131#undef BGR_FORMAT
 132