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|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
/* Required defines:
** FUNCNAME: Function name
** SIZETYPE: Type used for each pixel
** EXTRA_BYTE_OFFSET: Extra source byte offset for copying (used on big-endian machines in 24 bit mode)
*/
#include "sci/gfx/gfx_system.h"
#include "sci/gfx/gfx_resource.h"
#include "sci/gfx/gfx_tools.h"
namespace Sci {
#define EXTEND_COLOR(x) (unsigned) ((((unsigned) x) << 24) | (((unsigned) x) << 16) | (((unsigned) x) << 8) | ((unsigned) x))
template<int COPY_BYTES, typename SIZETYPE, int EXTRA_BYTE_OFFSET>
void _gfx_xlate_pixmap_unfiltered(gfx_mode_t *mode, gfx_pixmap_t *pxm, int scale) {
SIZETYPE result_colors[GFX_PIC_COLORS];
SIZETYPE alpha_color = 0xffffffff & mode->alpha_mask;
SIZETYPE alpha_ormask = 0;
int xfact = (scale) ? mode->xfact : 1;
int yfact = (scale) ? mode->yfact : 1;
int widthc, heightc; // Width duplication counter
int line_width = xfact * pxm->index_width;
int bytespp = mode->bytespp;
int x, y;
int i;
byte byte_transparent = (mode->flags & GFX_MODE_FLAG_REVERSE_ALPHA) ? 0 : 255;
byte byte_opaque = (mode->flags & GFX_MODE_FLAG_REVERSE_ALPHA) ? 255 : 0;
byte *src = pxm->index_data;
byte *dest = pxm->data;
byte *alpha_dest = pxm->alpha_map;
int using_alpha = pxm->color_key != GFX_PIXMAP_COLOR_KEY_NONE;
int separate_alpha_map = (!mode->alpha_mask) && using_alpha;
if (mode->flags & GFX_MODE_FLAG_REVERSE_ALPHA) {
alpha_ormask = alpha_color;
alpha_color = 0;
}
assert(bytespp == COPY_BYTES);
if (separate_alpha_map && !alpha_dest)
alpha_dest = pxm->alpha_map = (byte *)malloc(pxm->index_width * xfact * pxm->index_height * yfact);
// Calculate all colors
for (i = 0; i < pxm->colors_nr(); i++) {
int col;
const PaletteEntry& color = pxm->palette->getColor(i);
if (mode->palette)
col = color.parent_index;
else {
col = mode->format.ARGBToColor(0, color.r, color.g, color.b);
col |= alpha_ormask;
}
result_colors[i] = col;
}
if (!separate_alpha_map && pxm->color_key != GFX_PIXMAP_COLOR_KEY_NONE)
result_colors[pxm->color_key] = alpha_color;
src = pxm->index_data; // Workaround for gcc 4.2.3 bug on EMT64
for (y = 0; y < pxm->index_height; y++) {
byte *prev_dest = dest;
byte *prev_alpha_dest = alpha_dest;
for (x = 0; x < pxm->index_width; x++) {
int isalpha;
SIZETYPE col = result_colors[isalpha = *src++] << (EXTRA_BYTE_OFFSET * 8);
isalpha = (isalpha == pxm->color_key) && using_alpha;
// O(n) loops. There is an O(ln(n)) algorithm for this, but its slower for small n (which we're optimizing for here).
// And, anyway, most of the time is spent in memcpy() anyway.
for (widthc = 0; widthc < xfact; widthc++) {
memcpy(dest, &col, COPY_BYTES);
dest += COPY_BYTES;
}
if (separate_alpha_map) { // Set separate alpha map
memset(alpha_dest, (isalpha) ? byte_transparent : byte_opaque, xfact);
alpha_dest += xfact;
}
}
// Copies each line. O(n) iterations; again, this could be optimized to O(ln(n)) for very high resolutions,
// but that wouldn't really help that much, as the same amount of data still would have to be transferred.
for (heightc = 1; heightc < yfact; heightc++) {
memcpy(dest, prev_dest, line_width * bytespp);
dest += line_width * bytespp;
if (separate_alpha_map) {
memcpy(alpha_dest, prev_alpha_dest, line_width);
alpha_dest += line_width;
}
}
}
}
// linear filter: Macros (in reverse order)
#define X_CALC_INTENSITY_NORMAL (ctexel[i] << 16) + ((linecolor[i]) * (256-column_valuator)) + ((othercolumn[i] * column_valuator)) * (256-line_valuator)
#define X_CALC_INTENSITY_CENTER (ctexel[i] << 16) + ((linecolor[i]) * (256-column_valuator))
#define WRITE_XPART(X_CALC_INTENSITY, DO_X_STEP) \
for (subx = 0; subx < ((DO_X_STEP) ? (xfact >> 1) : 1); subx++) { \
unsigned int intensity; \
wrcolor = 0; \
for (i = 0; i < 3; i++) { \
intensity = X_CALC_INTENSITY; \
wrcolor |= (intensity >> shifts[i]) & masks[i]; \
} \
i = 3; \
intensity = X_CALC_INTENSITY; \
if (inverse_alpha) \
intensity = ~intensity; \
wrcolor |= (intensity >> shifts[i]) & masks[i]; \
if (separate_alpha_map) \
*alpha_wrpos++ = intensity >> 24; \
wrcolor <<= (EXTRA_BYTE_OFFSET * 8); \
memcpy(wrpos, &wrcolor, COPY_BYTES); \
wrpos += COPY_BYTES; \
if (DO_X_STEP) \
column_valuator -= column_step; \
} \
if (DO_X_STEP) \
column_step = -column_step
// End of macro definition
#define Y_CALC_INTENSITY_CENTER 0
#define Y_CALC_INTENSITY_NORMAL otherline[i] * line_valuator
#define WRITE_YPART(DO_Y_STEP, LINE_COLOR) \
for (suby = 0; suby < ((DO_Y_STEP)? yfact >> 1 : 1); suby++) { \
int column_valuator = column_step? 128 - (column_step >> 1) : 256; \
int linecolor[4]; \
int othercolumn[4]; \
int i; \
SIZETYPE wrcolor; \
wrpos = sublinepos; \
alpha_wrpos = alpha_sublinepos; \
for (i = 0; i < 4; i++) \
linecolor[i] = LINE_COLOR; \
/*-- left half --*/ \
MAKE_PIXEL((x == 0), othercolumn, ctexel, src[-1]); \
WRITE_XPART(X_CALC_INTENSITY_NORMAL, 1); \
column_valuator -= column_step; \
/*-- center --*/ \
if (xfact & 1) { \
WRITE_XPART(X_CALC_INTENSITY_CENTER, 0); \
} \
/*-- right half --*/ \
MAKE_PIXEL((x + 1 == pxm->index_width), othercolumn, ctexel, src[+1]); \
WRITE_XPART(X_CALC_INTENSITY_NORMAL, 1); \
if (DO_Y_STEP) \
line_valuator -= line_step; \
sublinepos += pxm->width * bytespp; \
alpha_sublinepos += pxm->width; \
} \
if (DO_Y_STEP) \
line_step = -line_step
// End of macro definition
template<int COPY_BYTES, typename SIZETYPE, int EXTRA_BYTE_OFFSET>
void _gfx_xlate_pixmap_linear(gfx_mode_t *mode, gfx_pixmap_t *pxm, int scale) {
int xfact = mode->xfact;
int yfact = mode->yfact;
int line_step = (yfact < 2) ? 0 : 256 / (yfact & ~1);
int column_step = (xfact < 2) ? 0 : 256 / (xfact & ~1);
int bytespp = mode->bytespp;
byte *src = pxm->index_data;
byte *dest = pxm->data;
byte *alpha_dest = pxm->alpha_map;
int using_alpha = pxm->color_key != GFX_PIXMAP_COLOR_KEY_NONE;
int separate_alpha_map = (!mode->alpha_mask) && using_alpha;
unsigned int masks[4], shifts[4], zero[3];
int x, y;
byte inverse_alpha = mode->flags & GFX_MODE_FLAG_REVERSE_ALPHA;
zero[0] = 255;
zero[1] = zero[2] = 0;
if (separate_alpha_map) {
masks[3] = 0;
shifts[3] = 24;
}
assert(bytespp == COPY_BYTES);
assert(!mode->palette);
masks[0] = mode->red_mask;
masks[1] = mode->green_mask;
masks[2] = mode->blue_mask;
masks[3] = mode->alpha_mask;
shifts[0] = mode->red_shift;
shifts[1] = mode->green_shift;
shifts[2] = mode->blue_shift;
shifts[3] = mode->alpha_shift;
if (separate_alpha_map && !alpha_dest)
alpha_dest = pxm->alpha_map = (byte *)malloc(pxm->index_width * xfact * pxm->index_height * yfact);
for (y = 0; y < pxm->index_height; y++) {
byte *linepos = dest;
byte *alpha_linepos = alpha_dest;
for (x = 0; x < pxm->index_width; x++) {
int otherline[4]; // the above line or the line below
int ctexel[4]; // Current texel
int subx, suby;
int line_valuator = line_step ? 128 - (line_step >> 1) : 256;
byte *wrpos, *alpha_wrpos;
byte *sublinepos = linepos;
byte *alpha_sublinepos = alpha_linepos;
ctexel[0] = ctexel[1] = ctexel[2] = ctexel[3] = 0;
#define MAKE_PIXEL(cond, rec, other, nr) \
if ((cond) || (using_alpha && nr == pxm->color_key)) { \
rec[0] = other[0] - ctexel[0]; \
rec[1] = other[1] - ctexel[1]; \
rec[2] = other[2] - ctexel[2]; \
rec[3] = 0xffff - ctexel[3]; \
} else { \
const PaletteEntry& e = (*pxm->palette)[nr]; \
rec[0] = (EXTEND_COLOR(e.r) >> 16) - ctexel[0]; \
rec[1] = (EXTEND_COLOR(e.g) >> 16) - ctexel[1]; \
rec[2] = (EXTEND_COLOR(e.b) >> 16) - ctexel[2]; \
rec[3] = 0 - ctexel[3]; \
}
MAKE_PIXEL(0, ctexel, zero, *src);
//-- Upper half --
MAKE_PIXEL((y == 0), otherline, ctexel, src[-pxm->index_width]);
WRITE_YPART(1, Y_CALC_INTENSITY_NORMAL);
if (yfact & 1) {
WRITE_YPART(0, Y_CALC_INTENSITY_CENTER);
}
//-- Lower half --
line_valuator -= line_step;
MAKE_PIXEL((y + 1 == pxm->index_height), otherline, ctexel, src[pxm->index_width]);
WRITE_YPART(1, Y_CALC_INTENSITY_NORMAL);
src++;
linepos += xfact * bytespp;
alpha_linepos += xfact;
}
dest += pxm->width * yfact * bytespp;
alpha_dest += pxm->width * yfact;
}
}
//----------------------
//** Trilinear filter **
//----------------------
#ifndef GFX_GET_PIXEL_DELTA
#define GFX_GET_PIXEL_DELTA
static void gfx_get_pixel_delta(unsigned int *color, int *delta, unsigned int *pixel0, unsigned int *pixel1) {
int j;
int transp0 = pixel0[3] == 0xffffff;
int transp1 = pixel1[3] == 0xffffff;
if (transp0 && !transp1) { // Transparent -> Opaque
memset(delta, 0, sizeof(int) * 3);
delta[3] = ((pixel1[3] >> 8) - (pixel0[3] >> 8));
memcpy(color, pixel1, sizeof(int) * 3);
color[3] = 0xffffff;
} else if (!transp0 && transp1) { // Opaque -> Transparent
memset(delta, 0, sizeof(int) * 3);
delta[3] = ((pixel1[3] >> 8) - (pixel0[3] >> 8));
memcpy(color, pixel0, sizeof(int) * 4);
} else if (transp0 && transp1) { // Transparent
delta[3] = 0;
color[3] = 0xffffff;
} else { // Opaque
memcpy(color, pixel0, sizeof(int) * 4);
for (j = 0; j < 4; j++)
delta[j] = ((pixel1[j] >> 8) - (pixel0[j] >> 8));
}
}
static void gfx_apply_delta(unsigned int *color, int *delta, int factor) {
int i;
for (i = 0; i < 4; i++)
color[i] += delta[i] * factor;
}
#endif
#define MAKE_PIXEL_TRILINEAR(cond, rec, nr) \
if (!(cond) || (using_alpha && nr == pxm->color_key)) { \
rec[0] = 0; \
rec[1] = 0; \
rec[2] = 0; \
rec[3] = 0xffffff; \
} else { \
const PaletteEntry& e = (*pxm->palette)[nr]; \
rec[0] = (EXTEND_COLOR(e.r) >> 8); \
rec[1] = (EXTEND_COLOR(e.g) >> 8); \
rec[2] = (EXTEND_COLOR(e.b) >> 8); \
rec[3] = 0; \
}
#define REVERSE_ALPHA(foo) ((inverse_alpha) ? ~(foo) : (foo))
template<int COPY_BYTES, typename SIZETYPE, int EXTRA_BYTE_OFFSET>
void _gfx_xlate_pixmap_trilinear(gfx_mode_t *mode, gfx_pixmap_t *pxm, int scale) {
int xfact = mode->xfact;
int yfact = mode->yfact;
int line_step = (yfact < 2) ? 0 : 256 / yfact;
int column_step = (xfact < 2) ? 0 : 256 / xfact;
int bytespp = mode->bytespp;
byte *src = pxm->index_data;
byte *dest = pxm->data;
byte *alpha_dest = pxm->alpha_map;
int using_alpha = pxm->color_key != GFX_PIXMAP_COLOR_KEY_NONE;
int separate_alpha_map = (!mode->alpha_mask) && using_alpha;
unsigned int masks[4], shifts[4];
unsigned int pixels[4][4];
// 0 1
// 2 3
int x, y;
byte inverse_alpha = mode->flags & GFX_MODE_FLAG_REVERSE_ALPHA;
if (separate_alpha_map) {
masks[3] = 0;
shifts[3] = 24;
}
assert(bytespp == COPY_BYTES);
assert(!mode->palette);
masks[0] = mode->red_mask;
masks[1] = mode->green_mask;
masks[2] = mode->blue_mask;
masks[3] = mode->alpha_mask;
shifts[0] = mode->red_shift;
shifts[1] = mode->green_shift;
shifts[2] = mode->blue_shift;
shifts[3] = mode->alpha_shift;
if (!(pxm->index_width && pxm->index_height))
return;
if (separate_alpha_map && !alpha_dest)
alpha_dest = pxm->alpha_map = (byte *)malloc(pxm->index_width * xfact * pxm->index_height * yfact);
src -= pxm->index_width + 1;
for (y = 0; y <= pxm->index_height; y++) {
byte *y_dest_backup = dest;
byte *y_alpha_dest_backup = alpha_dest;
int y_valuator = (y > 0) ? 0 : 128;
int yc_count;
if (y == 0)
yc_count = yfact >> 1;
else if (y == pxm->index_height)
yc_count = (yfact + 1) >> 1;
else
yc_count = yfact;
if (yfact & 1)
y_valuator += line_step >> 1;
for (x = 0; x <= pxm->index_width; x++) {
byte *x_dest_backup = dest;
byte *x_alpha_dest_backup = alpha_dest;
int x_valuator = (x > 0) ? 0 : 128;
int xc_count;
unsigned int leftcolor[4], rightcolor[4];
int leftdelta[4], rightdelta[4];
int xc, yc;
if (x == 0)
xc_count = xfact >> 1;
else if (x == pxm->index_width)
xc_count = (xfact + 1) >> 1;
else
xc_count = xfact;
if (xfact & 1)
x_valuator += column_step >> 1;
MAKE_PIXEL_TRILINEAR((y && x), pixels[0], *src);
MAKE_PIXEL_TRILINEAR((y && (x < pxm->index_width)), pixels[1], src[1]);
MAKE_PIXEL_TRILINEAR(((y < pxm->index_width) && x), pixels[2], src[pxm->index_width]);
MAKE_PIXEL_TRILINEAR(((y < pxm->index_width) && (x < pxm->index_width)), pixels[3], src[pxm->index_width + 1]);
// Optimize Me
gfx_get_pixel_delta(leftcolor, leftdelta, pixels[0], pixels[2]);
gfx_get_pixel_delta(rightcolor, rightdelta, pixels[1], pixels[3]);
gfx_apply_delta(leftcolor, leftdelta, y_valuator);
gfx_apply_delta(rightcolor, rightdelta, y_valuator);
for (yc = 0; yc < yc_count; yc++) {
unsigned int color[4];
int delta[4];
byte *yc_dest_backup = dest;
byte *yc_alpha_dest_backup = alpha_dest;
gfx_get_pixel_delta(color, delta, leftcolor, rightcolor);
gfx_apply_delta(color, delta, x_valuator);
for (xc = 0; xc < xc_count; xc++) {
SIZETYPE wrcolor;
int i;
wrcolor = 0;
for (i = 0; i < 3; i++)
wrcolor |= ((color[i] << 8) >> shifts[i]) & masks[i];
if (separate_alpha_map) {
*alpha_dest++ = REVERSE_ALPHA(color[3] >> 16);
} else
wrcolor |= REVERSE_ALPHA((color[3] << 8) >> shifts[3]) & masks[3];
wrcolor <<= (EXTRA_BYTE_OFFSET * 8);
memcpy(dest, &wrcolor, COPY_BYTES);
dest += COPY_BYTES;
gfx_apply_delta(color, delta, column_step);
}
gfx_apply_delta(leftcolor, leftdelta, line_step);
gfx_apply_delta(rightcolor, rightdelta, line_step);
dest = yc_dest_backup + pxm->index_width * xfact * COPY_BYTES;
alpha_dest = yc_alpha_dest_backup + pxm->index_width * xfact;
}
dest = x_dest_backup + xc_count * COPY_BYTES;
alpha_dest = x_alpha_dest_backup + xc_count;
if (x < pxm->index_width)
src++;
}
dest = y_dest_backup + pxm->index_width * xfact * yc_count * COPY_BYTES;
alpha_dest = y_alpha_dest_backup + pxm->index_width * xfact * yc_count;
}
}
#undef REVERSE_ALPHA
#undef WRITE_YPART
#undef Y_CALC_INTENSITY_CENTER
#undef Y_CALC_INTENSITY_NORMAL
#undef WRITE_XPART
#undef X_CALC_INTENSITY_CENTER
#undef X_CALC_INTENSITY_NORMAL
#undef MAKE_PIXEL_TRILINEAR
#undef MAKE_PIXEL
#undef SIZETYPE
#undef EXTEND_COLOR
static void _gfx_xlate_pixmap_unfiltered(gfx_mode_t *mode, gfx_pixmap_t *pxm, int scale) {
switch (mode->bytespp) {
case 1:
_gfx_xlate_pixmap_unfiltered<1, uint8, 0>(mode, pxm, scale);
break;
case 2:
_gfx_xlate_pixmap_unfiltered<2, uint16, 0>(mode, pxm, scale);
break;
case 3:
#ifdef SCUMM_BIG_ENDIAN
_gfx_xlate_pixmap_unfiltered<3, uint32, 1>(mode, pxm, scale);
#else
_gfx_xlate_pixmap_unfiltered<3, uint32, 0>(mode, pxm, scale);
#endif
break;
case 4:
_gfx_xlate_pixmap_unfiltered<4, uint32, 0>(mode, pxm, scale);
break;
default:
GFXERROR("Invalid mode->bytespp=%d\n", mode->bytespp);
}
if (pxm->flags & GFX_PIXMAP_FLAG_SCALED_INDEX) {
pxm->width = pxm->index_width;
pxm->height = pxm->index_height;
} else {
pxm->width = pxm->index_width * mode->xfact;
pxm->height = pxm->index_height * mode->yfact;
}
}
static void _gfx_xlate_pixmap_linear(gfx_mode_t *mode, gfx_pixmap_t *pxm, int scale) {
if (mode->palette || !scale) { // fall back to unfiltered
_gfx_xlate_pixmap_unfiltered(mode, pxm, scale);
return;
}
pxm->width = pxm->index_width * mode->xfact;
pxm->height = pxm->index_height * mode->yfact;
switch (mode->bytespp) {
case 1:
_gfx_xlate_pixmap_linear<1, uint8, 0>(mode, pxm, scale);
break;
case 2:
_gfx_xlate_pixmap_linear<2, uint16, 0>(mode, pxm, scale);
break;
case 3:
#ifdef SCUMM_BIG_ENDIAN
_gfx_xlate_pixmap_linear<3, uint32, 1>(mode, pxm, scale);
#else
_gfx_xlate_pixmap_linear<3, uint32, 0>(mode, pxm, scale);
#endif
break;
case 4:
_gfx_xlate_pixmap_linear<4, uint32, 0>(mode, pxm, scale);
break;
default:
GFXERROR("Invalid mode->bytespp=%d\n", mode->bytespp);
}
}
static void _gfx_xlate_pixmap_trilinear(gfx_mode_t *mode, gfx_pixmap_t *pxm, int scale) {
if (mode->palette || !scale) { // fall back to unfiltered
_gfx_xlate_pixmap_unfiltered(mode, pxm, scale);
return;
}
pxm->width = pxm->index_width * mode->xfact;
pxm->height = pxm->index_height * mode->yfact;
switch (mode->bytespp) {
case 1:
_gfx_xlate_pixmap_trilinear<1, uint8, 0>(mode, pxm, scale);
break;
case 2:
_gfx_xlate_pixmap_trilinear<2, uint16, 0>(mode, pxm, scale);
break;
case 3:
#ifdef SCUMM_BIG_ENDIAN
_gfx_xlate_pixmap_trilinear<3, uint32, 1>(mode, pxm, scale);
#else
_gfx_xlate_pixmap_trilinear<3, uint32, 0>(mode, pxm, scale);
#endif
break;
case 4:
_gfx_xlate_pixmap_trilinear<4, uint32, 0>(mode, pxm, scale);
break;
default:
GFXERROR("Invalid mode->bytespp=%d\n", mode->bytespp);
}
}
void gfx_xlate_pixmap(gfx_pixmap_t *pxm, gfx_mode_t *mode, gfx_xlate_filter_t filter) {
int was_allocated = 0;
if (mode->palette) {
if (pxm->palette && pxm->palette != mode->palette)
pxm->palette->mergeInto(mode->palette);
}
if (!pxm->data) {
pxm->data = (byte*)malloc(mode->xfact * mode->yfact * pxm->index_width * pxm->index_height * mode->bytespp + 1);
// +1: Eases coying on BE machines in 24 bpp packed mode
// Assume that memory, if allocated already, will be sufficient
// Allocate alpha map
if (!mode->alpha_mask && pxm->colors_nr() < GFX_PIC_COLORS)
pxm->alpha_map = (byte*)malloc(mode->xfact * mode->yfact * pxm->index_width * pxm->index_height + 1);
} else
was_allocated = 1;
switch (filter) {
case GFX_XLATE_FILTER_NONE:
_gfx_xlate_pixmap_unfiltered(mode, pxm, !(pxm->flags & GFX_PIXMAP_FLAG_SCALED_INDEX));
break;
case GFX_XLATE_FILTER_LINEAR:
_gfx_xlate_pixmap_linear(mode, pxm, !(pxm->flags & GFX_PIXMAP_FLAG_SCALED_INDEX));
break;
case GFX_XLATE_FILTER_TRILINEAR:
_gfx_xlate_pixmap_trilinear(mode, pxm, !(pxm->flags & GFX_PIXMAP_FLAG_SCALED_INDEX));
break;
default:
GFXERROR("Attempt to filter pixmap %04x in invalid mode #%d\n", pxm->ID, filter);
if (!was_allocated) {
if (!mode->alpha_mask && pxm->colors_nr() < GFX_PIC_COLORS)
free(pxm->alpha_map);
free(pxm->data);
}
}
if (pxm->palette)
pxm->palette_revision = pxm->palette->getRevision();
}
} // End of namespace Sci
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