448 lines
12 KiB
C
448 lines
12 KiB
C
/*
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* Intel XScale PXA255/270 LCDC emulation.
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*
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* Copyright (c) 2006 Openedhand Ltd.
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* Written by Andrzej Zaborowski <balrog@zabor.org>
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*
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* This code is licensed under the GPLv2.
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*
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* Framebuffer format conversion routines.
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*/
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# define SKIP_PIXEL(to) to += deststep
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#if BITS == 8
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# define COPY_PIXEL(to, from) do { *to = from; SKIP_PIXEL(to); } while (0)
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#elif BITS == 15 || BITS == 16
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# define COPY_PIXEL(to, from) \
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do { \
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*(uint16_t *) to = from; \
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SKIP_PIXEL(to); \
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} while (0)
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#elif BITS == 24
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# define COPY_PIXEL(to, from) \
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do { \
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*(uint16_t *) to = from; \
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*(to + 2) = (from) >> 16; \
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SKIP_PIXEL(to); \
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} while (0)
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#elif BITS == 32
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# define COPY_PIXEL(to, from) \
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do { \
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*(uint32_t *) to = from; \
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SKIP_PIXEL(to); \
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} while (0)
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#else
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# error unknown bit depth
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#endif
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#ifdef HOST_WORDS_BIGENDIAN
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# define SWAP_WORDS 1
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#endif
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#define FN_2(x) FN(x + 1) FN(x)
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#define FN_4(x) FN_2(x + 2) FN_2(x)
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static void glue(pxa2xx_draw_line2_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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{
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uint32_t *palette = opaque;
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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(dest, palette[(data >> ((x) * 2)) & 3]);
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#ifdef SWAP_WORDS
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FN_4(12)
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FN_4(8)
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FN_4(4)
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FN_4(0)
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#else
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FN_4(0)
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FN_4(4)
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FN_4(8)
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FN_4(12)
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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(pxa2xx_draw_line4_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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{
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uint32_t *palette = opaque;
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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(dest, palette[(data >> ((x) * 4)) & 0xf]);
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#ifdef SWAP_WORDS
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FN_2(6)
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FN_2(4)
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FN_2(2)
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FN_2(0)
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#else
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FN_2(0)
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FN_2(2)
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FN_2(4)
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FN_2(6)
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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(pxa2xx_draw_line8_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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{
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uint32_t *palette = opaque;
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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(dest, palette[(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(pxa2xx_draw_line16_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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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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b = (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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r = (data & 0x1f) << 3;
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data >>= 5;
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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b = (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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r = (data & 0x1f) << 3;
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COPY_PIXEL(dest, 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(pxa2xx_draw_line16t_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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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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b = (data & 0x1f) << 3;
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data >>= 5;
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g = (data & 0x1f) << 3;
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data >>= 5;
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r = (data & 0x1f) << 3;
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data >>= 5;
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if (data & 1)
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SKIP_PIXEL(dest);
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else
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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data >>= 1;
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b = (data & 0x1f) << 3;
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data >>= 5;
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g = (data & 0x1f) << 3;
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data >>= 5;
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r = (data & 0x1f) << 3;
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data >>= 5;
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if (data & 1)
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SKIP_PIXEL(dest);
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else
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COPY_PIXEL(dest, 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(pxa2xx_draw_line18_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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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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b = (data & 0x3f) << 2;
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data >>= 6;
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g = (data & 0x3f) << 2;
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data >>= 6;
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r = (data & 0x3f) << 2;
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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width -= 1;
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src += 4;
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}
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}
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/* The wicked packed format */
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static void glue(pxa2xx_draw_line18p_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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{
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uint32_t data[3];
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unsigned int r, g, b;
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while (width > 0) {
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data[0] = *(uint32_t *) src;
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src += 4;
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data[1] = *(uint32_t *) src;
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src += 4;
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data[2] = *(uint32_t *) src;
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src += 4;
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#ifdef SWAP_WORDS
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data[0] = bswap32(data[0]);
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data[1] = bswap32(data[1]);
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data[2] = bswap32(data[2]);
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#endif
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b = (data[0] & 0x3f) << 2;
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data[0] >>= 6;
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g = (data[0] & 0x3f) << 2;
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data[0] >>= 6;
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r = (data[0] & 0x3f) << 2;
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data[0] >>= 12;
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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b = (data[0] & 0x3f) << 2;
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data[0] >>= 6;
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g = ((data[1] & 0xf) << 4) | (data[0] << 2);
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data[1] >>= 4;
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r = (data[1] & 0x3f) << 2;
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data[1] >>= 12;
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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b = (data[1] & 0x3f) << 2;
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data[1] >>= 6;
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g = (data[1] & 0x3f) << 2;
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data[1] >>= 6;
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r = ((data[2] & 0x3) << 6) | (data[1] << 2);
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data[2] >>= 8;
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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b = (data[2] & 0x3f) << 2;
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data[2] >>= 6;
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g = (data[2] & 0x3f) << 2;
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data[2] >>= 6;
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r = data[2] << 2;
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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width -= 4;
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}
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}
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static void glue(pxa2xx_draw_line19_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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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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b = (data & 0x3f) << 2;
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data >>= 6;
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g = (data & 0x3f) << 2;
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data >>= 6;
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r = (data & 0x3f) << 2;
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data >>= 6;
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if (data & 1)
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SKIP_PIXEL(dest);
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else
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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width -= 1;
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src += 4;
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}
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}
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/* The wicked packed format */
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static void glue(pxa2xx_draw_line19p_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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{
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uint32_t data[3];
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unsigned int r, g, b;
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while (width > 0) {
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data[0] = *(uint32_t *) src;
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src += 4;
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data[1] = *(uint32_t *) src;
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src += 4;
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data[2] = *(uint32_t *) src;
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src += 4;
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# ifdef SWAP_WORDS
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data[0] = bswap32(data[0]);
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data[1] = bswap32(data[1]);
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data[2] = bswap32(data[2]);
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# endif
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b = (data[0] & 0x3f) << 2;
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data[0] >>= 6;
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g = (data[0] & 0x3f) << 2;
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data[0] >>= 6;
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r = (data[0] & 0x3f) << 2;
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data[0] >>= 6;
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if (data[0] & 1)
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SKIP_PIXEL(dest);
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else
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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data[0] >>= 6;
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b = (data[0] & 0x3f) << 2;
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data[0] >>= 6;
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g = ((data[1] & 0xf) << 4) | (data[0] << 2);
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data[1] >>= 4;
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r = (data[1] & 0x3f) << 2;
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data[1] >>= 6;
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if (data[1] & 1)
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SKIP_PIXEL(dest);
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else
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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data[1] >>= 6;
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b = (data[1] & 0x3f) << 2;
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data[1] >>= 6;
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g = (data[1] & 0x3f) << 2;
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data[1] >>= 6;
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r = ((data[2] & 0x3) << 6) | (data[1] << 2);
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data[2] >>= 2;
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if (data[2] & 1)
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SKIP_PIXEL(dest);
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else
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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data[2] >>= 6;
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b = (data[2] & 0x3f) << 2;
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data[2] >>= 6;
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g = (data[2] & 0x3f) << 2;
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data[2] >>= 6;
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r = data[2] << 2;
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data[2] >>= 6;
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if (data[2] & 1)
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SKIP_PIXEL(dest);
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else
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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width -= 4;
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}
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}
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static void glue(pxa2xx_draw_line24_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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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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b = data & 0xff;
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data >>= 8;
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g = data & 0xff;
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data >>= 8;
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r = data & 0xff;
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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width -= 1;
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src += 4;
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}
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}
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static void glue(pxa2xx_draw_line24t_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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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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b = (data & 0x7f) << 1;
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data >>= 7;
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g = data & 0xff;
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data >>= 8;
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r = data & 0xff;
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data >>= 8;
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if (data & 1)
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SKIP_PIXEL(dest);
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else
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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width -= 1;
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src += 4;
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}
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}
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static void glue(pxa2xx_draw_line25_, BITS)(void *opaque,
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uint8_t *dest, const uint8_t *src, int width, int deststep)
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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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b = data & 0xff;
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data >>= 8;
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g = data & 0xff;
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data >>= 8;
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r = data & 0xff;
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data >>= 8;
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if (data & 1)
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SKIP_PIXEL(dest);
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else
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COPY_PIXEL(dest, glue(rgb_to_pixel, BITS)(r, g, b));
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width -= 1;
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src += 4;
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}
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}
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/* Overlay planes disabled, no transparency */
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static drawfn glue(pxa2xx_draw_fn_, BITS)[16] =
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{
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[0 ... 0xf] = NULL,
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[pxa_lcdc_2bpp] = glue(pxa2xx_draw_line2_, BITS),
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[pxa_lcdc_4bpp] = glue(pxa2xx_draw_line4_, BITS),
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[pxa_lcdc_8bpp] = glue(pxa2xx_draw_line8_, BITS),
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[pxa_lcdc_16bpp] = glue(pxa2xx_draw_line16_, BITS),
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[pxa_lcdc_18bpp] = glue(pxa2xx_draw_line18_, BITS),
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[pxa_lcdc_18pbpp] = glue(pxa2xx_draw_line18p_, BITS),
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[pxa_lcdc_24bpp] = glue(pxa2xx_draw_line24_, BITS),
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};
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/* Overlay planes enabled, transparency used */
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static drawfn glue(glue(pxa2xx_draw_fn_, BITS), t)[16] =
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{
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[0 ... 0xf] = NULL,
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[pxa_lcdc_4bpp] = glue(pxa2xx_draw_line4_, BITS),
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[pxa_lcdc_8bpp] = glue(pxa2xx_draw_line8_, BITS),
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[pxa_lcdc_16bpp] = glue(pxa2xx_draw_line16t_, BITS),
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[pxa_lcdc_19bpp] = glue(pxa2xx_draw_line19_, BITS),
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[pxa_lcdc_19pbpp] = glue(pxa2xx_draw_line19p_, BITS),
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[pxa_lcdc_24bpp] = glue(pxa2xx_draw_line24t_, BITS),
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[pxa_lcdc_25bpp] = glue(pxa2xx_draw_line25_, BITS),
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};
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#undef BITS
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#undef COPY_PIXEL
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#undef SKIP_PIXEL
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#ifdef SWAP_WORDS
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# undef SWAP_WORDS
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#endif
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