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 

    45 static 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_raw(s);

    51 	r = (pal[v] >> 16) & 0xff;

    52 	g = (pal[v] >>  8) & 0xff;

    53 	b = (pal[v] >>  0) & 0xff;

    54 	((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);

    55 	s ++;

    56 	d += BPP;

    57     } while (-- width != 0);

    58 }

    59 

    60 static 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_raw(s);

    68 	r = ((rgb565 >> 11) & 0x1f) << 3;

    69 	g = ((rgb565 >>  5) & 0x3f) << 2;

    70 	b = ((rgb565 >>  0) & 0x1f) << 3;

    71 	((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);

    72 	s += 2;

    73 	d += BPP;

    74     } while (-- width != 0);

    75 }

    76 

    77 static 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 	ldub_raw(s);

    84 #if defined(TARGET_WORDS_BIGENDIAN)

    85         r = s[1];

    86         g = s[2];

    87         b = s[3];

    88 #else

    89         b = s[0];

    90         g = s[1];

    91         r = s[2];

    92 #endif

    93 	((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, PIXEL_NAME)(r, g, b);

    94 	s += 4;

    95 	d += BPP;

    96     } while (-- width != 0);

    97 }

    98 

    99 #undef DEPTH

   100 #undef BPP

   101 #undef PIXEL_TYPE

   102 #undef PIXEL_NAME

   103 #undef BGR_FORMAT