qemu/hw/display/pxa2xx_template.h
Paolo Bonzini 2cdaca90dd display: avoid multi-statement macro
For blizzard, pl110 and tc6393xb this is harmless, but for pxa2xx
Coverity noticed that it is used inside an "if" statement.
Fix it because it's the file with the highest number of defects
in the whole QEMU tree!  Use "do...while (0)", or just remove the
semicolon if there's a single statement in the macro.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-01-31 14:47:33 +00:00

448 lines
12 KiB
C

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