253 lines
5.5 KiB
C
253 lines
5.5 KiB
C
/*
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* Arm PrimeCell PL110 Color LCD Controller
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*
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* Copyright (c) 2005 CodeSourcery, LLC.
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* Written by Paul Brook
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*
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* This code is licenced under the GNU LGPL
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*
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* Framebuffer format conversion routines.
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*/
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#ifndef ORDER
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#if BITS == 8
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#define COPY_PIXEL(to, from) *(to++) = from
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#elif BITS == 15 || BITS == 16
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#define COPY_PIXEL(to, from) *(uint16_t *)to = from; to += 2;
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#elif BITS == 24
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#define COPY_PIXEL(to, from) \
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*(to++) = from; *(to++) = (from) >> 8; *(to++) = (from) >> 16
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#elif BITS == 32
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#define COPY_PIXEL(to, from) *(uint32_t *)to = from; to += 4;
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#else
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#error unknown bit depth
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#endif
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#define ORDER 0
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#include "pl110_template.h"
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#define ORDER 1
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#include "pl110_template.h"
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#define ORDER 2
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#include "pl110_template.h"
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static drawfn glue(pl110_draw_fn_,BITS)[18] =
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{
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glue(pl110_draw_line1_lblp,BITS),
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glue(pl110_draw_line2_lblp,BITS),
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glue(pl110_draw_line4_lblp,BITS),
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glue(pl110_draw_line8_lblp,BITS),
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glue(pl110_draw_line16_lblp,BITS),
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glue(pl110_draw_line32_lblp,BITS),
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glue(pl110_draw_line1_bbbp,BITS),
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glue(pl110_draw_line2_bbbp,BITS),
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glue(pl110_draw_line4_bbbp,BITS),
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glue(pl110_draw_line8_bbbp,BITS),
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glue(pl110_draw_line16_bbbp,BITS),
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glue(pl110_draw_line32_bbbp,BITS),
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glue(pl110_draw_line1_lbbp,BITS),
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glue(pl110_draw_line2_lbbp,BITS),
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glue(pl110_draw_line4_lbbp,BITS),
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glue(pl110_draw_line8_lbbp,BITS),
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glue(pl110_draw_line16_lbbp,BITS),
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glue(pl110_draw_line32_lbbp,BITS)
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};
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#undef BITS
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#undef COPY_PIXEL
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#else
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#if ORDER == 0
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#define NAME glue(lblp, BITS)
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#ifdef WORDS_BIGENDIAN
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#define SWAP_WORDS 1
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#endif
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#elif ORDER == 1
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#define NAME glue(bbbp, BITS)
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#ifndef WORDS_BIGENDIAN
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#define SWAP_WORDS 1
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#endif
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#else
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#define SWAP_PIXELS 1
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#define NAME glue(lbbp, BITS)
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#ifdef WORDS_BIGENDIAN
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#define SWAP_WORDS 1
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#endif
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#endif
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#define FN_2(x, y) FN(x, y) FN(x+1, y)
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#define FN_4(x, y) FN_2(x, y) FN_2(x+2, y)
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#define FN_8(y) FN_4(0, y) FN_4(4, y)
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static void glue(pl110_draw_line1_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
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{
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uint32_t data;
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while (width > 0) {
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data = *(uint32_t *)src;
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#ifdef SWAP_PIXELS
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#define FN(x, y) COPY_PIXEL(d, pallette[(data >> (y + 7 - (x))) & 1]);
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#else
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#define FN(x, y) COPY_PIXEL(d, pallette[(data >> ((x) + y)) & 1]);
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#endif
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#ifdef SWAP_WORDS
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FN_8(24)
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FN_8(16)
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FN_8(8)
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FN_8(0)
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#else
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FN_8(0)
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FN_8(8)
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FN_8(16)
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FN_8(24)
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#endif
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#undef FN
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width -= 32;
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src += 4;
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}
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}
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static void glue(pl110_draw_line2_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
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{
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uint32_t data;
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while (width > 0) {
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data = *(uint32_t *)src;
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#ifdef SWAP_PIXELS
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#define FN(x, y) COPY_PIXEL(d, pallette[(data >> (y + 6 - (x)*2)) & 3]);
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#else
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#define FN(x, y) COPY_PIXEL(d, pallette[(data >> ((x)*2 + y)) & 3]);
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#endif
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#ifdef SWAP_WORDS
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FN_4(0, 24)
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FN_4(0, 16)
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FN_4(0, 8)
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FN_4(0, 0)
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#else
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FN_4(0, 0)
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FN_4(0, 8)
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FN_4(0, 16)
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FN_4(0, 24)
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#endif
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#undef FN
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width -= 16;
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src += 4;
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}
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}
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static void glue(pl110_draw_line4_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
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{
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uint32_t data;
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while (width > 0) {
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data = *(uint32_t *)src;
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#ifdef SWAP_PIXELS
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#define FN(x, y) COPY_PIXEL(d, pallette[(data >> (y + 4 - (x)*4)) & 0xf]);
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#else
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#define FN(x, y) COPY_PIXEL(d, pallette[(data >> ((x)*4 + y)) & 0xf]);
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#endif
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#ifdef SWAP_WORDS
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FN_2(0, 24)
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FN_2(0, 16)
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FN_2(0, 8)
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FN_2(0, 0)
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#else
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FN_2(0, 0)
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FN_2(0, 8)
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FN_2(0, 16)
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FN_2(0, 24)
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#endif
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#undef FN
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width -= 8;
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src += 4;
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}
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}
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static void glue(pl110_draw_line8_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
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{
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uint32_t data;
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while (width > 0) {
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data = *(uint32_t *)src;
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#define FN(x) COPY_PIXEL(d, pallette[(data >> (x)) & 0xff]);
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#ifdef SWAP_WORDS
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FN(24)
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FN(16)
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FN(8)
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FN(0)
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#else
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FN(0)
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FN(8)
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FN(16)
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FN(24)
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#endif
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#undef FN
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width -= 4;
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src += 4;
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}
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}
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static void glue(pl110_draw_line16_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
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{
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uint32_t data;
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unsigned int r, g, b;
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while (width > 0) {
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data = *(uint32_t *)src;
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#ifdef SWAP_WORDS
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data = bswap32(data);
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#endif
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#if 0
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r = data & 0x1f;
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data >>= 5;
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g = data & 0x3f;
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data >>= 6;
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b = data & 0x1f;
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data >>= 5;
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#else
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r = (data & 0x1f) << 3;
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data >>= 5;
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g = (data & 0x3f) << 2;
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data >>= 6;
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b = (data & 0x1f) << 3;
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data >>= 5;
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#endif
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COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
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r = (data & 0x1f) << 3;
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data >>= 5;
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g = (data & 0x3f) << 2;
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data >>= 6;
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b = (data & 0x1f) << 3;
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data >>= 5;
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COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
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width -= 2;
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src += 4;
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}
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}
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static void glue(pl110_draw_line32_,NAME)(uint32_t *pallette, uint8_t *d, const uint8_t *src, int width)
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{
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uint32_t data;
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unsigned int r, g, b;
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while (width > 0) {
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data = *(uint32_t *)src;
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#ifdef SWAP_WORDS
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r = data & 0xff;
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g = (data >> 8) & 0xff;
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b = (data >> 16) & 0xff;
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#else
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r = (data >> 24) & 0xff;
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g = (data >> 16) & 0xff;
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b = (data >> 8) & 0xff;
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#endif
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COPY_PIXEL(d, glue(rgb_to_pixel,BITS)(r, g, b));
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width--;
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src += 4;
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}
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}
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#undef SWAP_PIXELS
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#undef NAME
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#undef SWAP_WORDS
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#undef ORDER
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#endif
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