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235 lines
7.4 KiB
C
235 lines
7.4 KiB
C
#include "ddraw_private.h"
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#include "debugtools.h"
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DEFAULT_DEBUG_CHANNEL(ddraw);
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/* *************************************
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16 / 15 bpp to palettized 8 bpp
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************************************* */
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static void pixel_convert_16_to_8(void *src, void *dst, DWORD width, DWORD height, LONG pitch, IDirectDrawPaletteImpl* palette) {
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unsigned char *c_src = (unsigned char *) src;
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unsigned short *c_dst = (unsigned short *) dst;
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int y;
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if (palette != NULL) {
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const unsigned int * pal = (unsigned int *) palette->screen_palents;
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for (y = height; y--; ) {
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#if defined(__i386__) && defined(__GNUC__)
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/* gcc generates slightly inefficient code for the the copy/lookup,
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* it generates one excess memory access (to pal) per pixel. Since
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* we know that pal is not modified by the memory write we can
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* put it into a register and reduce the number of memory accesses
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* from 4 to 3 pp. There are two xor eax,eax to avoid pipeline
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* stalls. (This is not guaranteed to be the fastest method.)
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*/
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__asm__ __volatile__(
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"xor %%eax,%%eax\n"
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"1:\n"
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" lodsb\n"
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" movw (%%edx,%%eax,4),%%ax\n"
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" stosw\n"
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" xor %%eax,%%eax\n"
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" loop 1b\n"
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: "=S" (c_src), "=D" (c_dst)
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: "S" (c_src), "D" (c_dst) , "c" (width), "d" (pal)
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: "eax", "cc", "memory"
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);
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c_src+=(pitch-width);
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#else
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unsigned char * srclineend = c_src+width;
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while (c_src < srclineend)
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*c_dst++ = pal[*c_src++];
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c_src+=(pitch-width);
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#endif
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}
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} else {
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FIXME("No palette set...\n");
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memset(dst, 0, width * height * 2);
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}
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}
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static void palette_convert_16_to_8(
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LPPALETTEENTRY palent, void *screen_palette, DWORD start, DWORD count
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) {
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int i;
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unsigned int *pal = (unsigned int *) screen_palette;
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for (i = 0; i < count; i++)
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pal[start + i] = (((((unsigned short) palent[i].peRed) & 0xF8) << 8) |
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((((unsigned short) palent[i].peBlue) & 0xF8) >> 3) |
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((((unsigned short) palent[i].peGreen) & 0xFC) << 3));
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}
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static void palette_convert_15_to_8(
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LPPALETTEENTRY palent, void *screen_palette, DWORD start, DWORD count
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) {
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int i;
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unsigned int *pal = (unsigned int *) screen_palette;
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for (i = 0; i < count; i++)
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pal[start + i] = (((((unsigned short) palent[i].peRed) & 0xF8) << 7) |
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((((unsigned short) palent[i].peBlue) & 0xF8) >> 3) |
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((((unsigned short) palent[i].peGreen) & 0xF8) << 2));
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}
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/* *************************************
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24 to palettized 8 bpp
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************************************* */
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static void pixel_convert_24_to_8(
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void *src, void *dst, DWORD width, DWORD height, LONG pitch,
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IDirectDrawPaletteImpl* palette
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) {
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unsigned char *c_src = (unsigned char *) src;
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unsigned char *c_dst = (unsigned char *) dst;
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int y;
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if (palette != NULL) {
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const unsigned int *pal = (unsigned int *) palette->screen_palents;
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for (y = height; y--; ) {
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unsigned char * srclineend = c_src+width;
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while (c_src < srclineend ) {
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register long pixel = pal[*c_src++];
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*c_dst++ = pixel;
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*c_dst++ = pixel>>8;
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*c_dst++ = pixel>>16;
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}
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c_src+=(pitch-width);
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}
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} else {
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FIXME("No palette set...\n");
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memset(dst, 0, width * height * 3);
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}
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}
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/* *************************************
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32 bpp to palettized 8 bpp
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************************************* */
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static void pixel_convert_32_to_8(
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void *src, void *dst, DWORD width, DWORD height, LONG pitch,
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IDirectDrawPaletteImpl* palette
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) {
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unsigned char *c_src = (unsigned char *) src;
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unsigned int *c_dst = (unsigned int *) dst;
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int y;
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if (palette != NULL) {
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const unsigned int *pal = (unsigned int *) palette->screen_palents;
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for (y = height; y--; ) {
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#if defined(__i386__) && defined(__GNUC__)
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/* See comment in pixel_convert_16_to_8 */
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__asm__ __volatile__(
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"xor %%eax,%%eax\n"
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"1:\n"
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" lodsb\n"
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" movl (%%edx,%%eax,4),%%eax\n"
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" stosl\n"
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" xor %%eax,%%eax\n"
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" loop 1b\n"
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: "=S" (c_src), "=D" (c_dst)
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: "S" (c_src), "D" (c_dst) , "c" (width), "d" (pal)
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: "eax", "cc", "memory"
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);
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c_src+=(pitch-width);
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#else
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unsigned char * srclineend = c_src+width;
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while (c_src < srclineend )
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*c_dst++ = pal[*c_src++];
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c_src+=(pitch-width);
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#endif
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}
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} else {
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FIXME("No palette set...\n");
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memset(dst, 0, width * height * 4);
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}
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}
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static void palette_convert_24_to_8(
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LPPALETTEENTRY palent, void *screen_palette, DWORD start, DWORD count
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) {
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int i;
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unsigned int *pal = (unsigned int *) screen_palette;
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for (i = 0; i < count; i++)
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pal[start + i] = ((((unsigned int) palent[i].peRed) << 16) |
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(((unsigned int) palent[i].peGreen) << 8) |
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((unsigned int) palent[i].peBlue));
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}
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/* *************************************
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16 bpp to 15 bpp
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************************************* */
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static void pixel_convert_15_to_16(
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void *src, void *dst, DWORD width, DWORD height, LONG pitch,
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IDirectDrawPaletteImpl* palette
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) {
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unsigned short *c_src = (unsigned short *) src;
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unsigned short *c_dst = (unsigned short *) dst;
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int y;
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for (y = height; y--; ) {
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unsigned short * srclineend = c_src+width;
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while (c_src < srclineend ) {
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unsigned short val = *c_src++;
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*c_dst++=((val&0xFFC0)>>1)|(val&0x001f);
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}
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c_src+=((pitch/2)-width);
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}
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}
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/* *************************************
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32 bpp to 16 bpp
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************************************* */
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static void pixel_convert_32_to_16(
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void *src, void *dst, DWORD width, DWORD height, LONG pitch,
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IDirectDrawPaletteImpl* palette
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) {
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unsigned short *c_src = (unsigned short *) src;
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unsigned int *c_dst = (unsigned int *) dst;
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int y;
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for (y = height; y--; ) {
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unsigned short * srclineend = c_src+width;
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while (c_src < srclineend ) {
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*c_dst++ = (((*c_src & 0xF800) << 8) |
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((*c_src & 0x07E0) << 5) |
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((*c_src & 0x001F) << 3));
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c_src++;
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}
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c_src+=((pitch/2)-width);
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}
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}
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/* *************************************
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32 bpp to 24 bpp
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************************************* */
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static void pixel_convert_32_to_24(
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void *src, void *dst, DWORD width, DWORD height, LONG pitch,
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IDirectDrawPaletteImpl* palette
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) {
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unsigned char *c_src = (unsigned char *) src;
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unsigned int *c_dst = (unsigned int *) dst;
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int y;
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for (y = height; y--; ) {
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unsigned char * srclineend = c_src+width*3;
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while (c_src < srclineend ) {
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/* FIXME: wrong for big endian */
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memcpy(c_dst,c_src,3);
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c_src+=3;
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c_dst++;
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}
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c_src+=pitch-width*3;
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}
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}
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Convert ModeEmulations[7] = {
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{ { 32, 24, 0x00FF0000, 0x0000FF00, 0x000000FF }, { 24, 24, 0xFF0000, 0x0000FF00, 0x00FF }, { pixel_convert_32_to_24, NULL } },
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{ { 32, 24, 0x00FF0000, 0x0000FF00, 0x000000FF }, { 8, 8, 0x00, 0x00, 0x00 }, { pixel_convert_32_to_8, palette_convert_24_to_8 } },
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{ { 32, 24, 0x00FF0000, 0x0000FF00, 0x000000FF }, { 16, 16, 0xF800, 0x07E0, 0x001F }, { pixel_convert_32_to_16, NULL } },
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{ { 24, 24, 0xFF0000, 0x00FF00, 0x0000FF }, { 8, 8, 0x00, 0x00, 0x00 }, { pixel_convert_24_to_8, palette_convert_24_to_8 } },
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{ { 16, 15, 0x7C00, 0x03E0, 0x001F }, { 16,16, 0xf800, 0x07e0, 0x001f }, { pixel_convert_15_to_16, NULL } },
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{ { 16, 16, 0xF800, 0x07E0, 0x001F }, { 8, 8, 0x00, 0x00, 0x00 }, { pixel_convert_16_to_8, palette_convert_16_to_8 } },
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{ { 16, 15, 0x7C00, 0x03E0, 0x001F }, { 8, 8, 0x00, 0x00, 0x00 }, { pixel_convert_16_to_8, palette_convert_15_to_8 } },
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};
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