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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.
*
* $URL$
* $Id$
*
*/
#include "sci/sci_memory.h"
#include "sci/gfx/gfx_tools.h"
namespace Sci {
rect_t gfx_rect_fullscreen = {0, 0, 320, 200};
void gfx_clip_box_basic(rect_t *box, int maxx, int maxy) {
if (box->x < 0)
box->x = 0;
if (box->y < 0)
box->y = 0;
if (box->x + box->xl > maxx)
box->xl = maxx - box->x + 1;
if (box->y + box->yl > maxy)
box->yl = maxy - box->y + 1;
}
gfx_mode_t *gfx_new_mode(int xfact, int yfact, const Graphics::PixelFormat &format, int palette, int flags) {
gfx_mode_t *mode = (gfx_mode_t *)sci_malloc(sizeof(gfx_mode_t));
mode->xfact = xfact;
mode->yfact = yfact;
mode->bytespp = format.bytesPerPixel;
// FIXME: I am not sure whether the following assignments are quite right.
// The only code using these are the built-in scalers of the SCI engine.
// And those are pretty weird, so I am not sure I interpreted them correctly.
// They also seem somewhat inefficient and and should probably just be
// replaced resp. rewritten from scratch.
mode->red_mask = format.ARGBToColor(0, 0xFF, 0, 0);
mode->green_mask = format.ARGBToColor(0, 0, 0xFF, 0);
mode->blue_mask = format.ARGBToColor(0, 0, 0, 0xFF);
mode->alpha_mask = format.ARGBToColor(0xFF, 0, 0, 0);
mode->red_shift = format.rLoss;
mode->green_shift = format.gLoss;
mode->blue_shift = format.bLoss;
mode->alpha_shift = format.aLoss;
mode->flags = flags;
if (palette) {
mode->palette = (gfx_palette_t *)sci_malloc(sizeof(gfx_palette_t));
mode->palette->max_colors_nr = palette;
mode->palette->colors = (gfx_palette_color_t *)sci_calloc(sizeof(gfx_palette_color_t), palette); // Initialize with empty entries
} else
mode->palette = NULL;
return mode;
}
void gfx_free_mode(gfx_mode_t *mode) {
if (mode->palette) {
free(mode->palette->colors);
free(mode->palette);
}
free(mode);
}
void gfx_copy_pixmap_box_i(gfx_pixmap_t *dest, gfx_pixmap_t *src, rect_t box) {
int width, height;
int offset;
if ((dest->index_xl != src->index_xl) || (dest->index_yl != src->index_yl))
return;
gfx_clip_box_basic(&box, dest->index_xl, dest->index_yl);
if (box.xl <= 0 || box.yl <= 0)
return;
height = box.yl;
width = box.xl;
offset = box.x + (box.y * dest->index_xl);
while (height--) {
memcpy(dest->index_data + offset, src->index_data + offset, width);
offset += dest->index_xl;
}
}
gfx_pixmap_t *gfx_clone_pixmap(gfx_pixmap_t *pxm, gfx_mode_t *mode) {
gfx_pixmap_t *clone = (gfx_pixmap_t *)sci_malloc(sizeof(gfx_pixmap_t));
*clone = *pxm;
clone->index_data = NULL;
clone->colors = NULL;
clone->data = NULL;
gfx_pixmap_alloc_data(clone, mode);
memcpy(clone->data, pxm->data, clone->data_size);
if (clone->alpha_map) {
clone->alpha_map = (byte *) sci_malloc(clone->xl * clone->yl);
memcpy(clone->alpha_map, pxm->alpha_map, clone->xl * clone->yl);
}
return clone;
}
gfx_pixmap_t *gfx_new_pixmap(int xl, int yl, int resid, int loop, int cel) {
gfx_pixmap_t *pxm = (gfx_pixmap_t *)sci_malloc(sizeof(gfx_pixmap_t));
pxm->alpha_map = NULL;
pxm->data = NULL;
pxm->internal.info = NULL;
pxm->colors = NULL;
pxm->internal.handle = 0;
pxm->index_xl = xl;
pxm->index_yl = yl;
pxm->ID = resid;
pxm->loop = loop;
pxm->cel = cel;
pxm->index_data = NULL;
pxm->flags = 0;
pxm->color_key = 0xff;
return pxm;
}
void gfx_free_pixmap(gfx_driver_t *driver, gfx_pixmap_t *pxm) {
if (driver) {
if (driver->mode->palette && pxm->flags & GFX_PIXMAP_FLAG_PALETTE_ALLOCATED
&& !(pxm->flags & GFX_PIXMAP_FLAG_DONT_UNALLOCATE_PALETTE) && !(pxm->flags & GFX_PIXMAP_FLAG_EXTERNAL_PALETTE)) {
int i;
int error = 0;
GFXDEBUG("UNALLOCATING %d\n", pxm->colors_nr);
for (i = 0; i < pxm->colors_nr; i++)
if (gfx_free_color(driver->mode->palette, pxm->colors + i))
error++;
if (error) {
GFXWARN("%d errors occured while freeing %d colors of pixmap with ID %06x/%d/%d\n",
error, pxm->colors_nr, pxm->ID, pxm->loop, pxm->cel);
}
}
}
if (pxm->index_data)
free(pxm->index_data);
if (pxm->alpha_map)
free(pxm->alpha_map);
if (pxm->data)
free(pxm->data);
if (pxm->colors && !(pxm->flags & GFX_PIXMAP_FLAG_EXTERNAL_PALETTE))
free(pxm->colors);
free(pxm);
}
gfx_pixmap_t *gfx_pixmap_alloc_index_data(gfx_pixmap_t *pixmap) {
int size;
if (pixmap->index_data) {
GFXWARN("Attempt to allocate pixmap index data twice!\n");
return pixmap;
}
size = pixmap->index_xl * pixmap->index_yl;
if (!size)
size = 1;
pixmap->index_data = (byte*)sci_malloc(size);
memset(pixmap->index_data, 0, size);
return pixmap;
}
gfx_pixmap_t *gfx_pixmap_free_index_data(gfx_pixmap_t *pixmap) {
if (!pixmap->index_data) {
GFXWARN("Attempt to free pixmap index data twice!\n");
return pixmap;
}
free(pixmap->index_data);
pixmap->index_data = NULL;
return pixmap;
}
gfx_pixmap_t *gfx_pixmap_alloc_data(gfx_pixmap_t *pixmap, gfx_mode_t *mode) {
int size;
if (pixmap->data) {
GFXWARN("Attempt to allocate pixmap data twice!\n");
return pixmap;
}
if (pixmap->flags & GFX_PIXMAP_FLAG_SCALED_INDEX) {
pixmap->xl = pixmap->index_xl;
pixmap->yl = pixmap->index_yl;
} else {
pixmap->xl = pixmap->index_xl * mode->xfact;
pixmap->yl = pixmap->index_yl * mode->yfact;
}
size = pixmap->xl * pixmap->yl * mode->bytespp;
if (!size)
size = 1;
pixmap->data = (byte*)sci_malloc(pixmap->data_size = size);
return pixmap;
}
gfx_pixmap_t *gfx_pixmap_free_data(gfx_pixmap_t *pixmap) {
if (!pixmap->data) {
GFXWARN("Attempt to free pixmap data twice!\n");
return pixmap;
}
free(pixmap->data);
pixmap->data = NULL;
return pixmap;
}
int gfx_alloc_color(gfx_palette_t *pal, gfx_pixmap_color_t *color) {
int i;
int dr, dg, db;
int bestdelta = 1 + ((0x100 * 0x100) * 3);
int bestcolor = -1;
int firstfree = -1;
if (pal == NULL)
return GFX_OK;
if (pal->max_colors_nr <= 0) {
GFXERROR("Palette has zero or less color entries!\n");
return GFX_ERROR;
}
if (color->global_index != GFX_COLOR_INDEX_UNMAPPED) {
#if 0
GFXDEBUG("Attempt to allocate color twice: index 0x%d (%02x/%02x/%02x)!\n",
color->global_index, color->r, color->g, color->b);
#endif
return GFX_OK;
}
for (i = 0; i < pal->max_colors_nr; i++) {
gfx_palette_color_t *pal_color = pal->colors + i;
if (pal_color->lockers) {
int delta;
dr = abs(pal_color->r - color->r);
dg = abs(pal_color->g - color->g);
db = abs(pal_color->b - color->b);
if (dr == 0 && dg == 0 && db == 0) {
color->global_index = i;
return GFX_OK;
}
delta = (dr * dr) + (dg * dg) + (db * db);
if (delta < bestdelta) {
bestdelta = delta;
bestcolor = i;
}
} else
if (firstfree == -1)
firstfree = i;
}
if (firstfree != -1) {
pal->colors[firstfree].r = color->r;
pal->colors[firstfree].g = color->g;
pal->colors[firstfree].b = color->b;
pal->colors[firstfree].lockers = 1;
color->global_index = firstfree;
return 42; // positive value to indicate that this color still needs to be set
}
color->global_index = bestcolor;
//GFXWARN("Out of palette colors- doing approximated mapping");
return GFX_OK;
}
int gfx_free_color(gfx_palette_t *pal, gfx_pixmap_color_t *color) {
gfx_palette_color_t *palette_color = pal->colors + color->global_index;
if (!pal)
return GFX_OK;
if (color->global_index == GFX_COLOR_INDEX_UNMAPPED) {
GFXWARN("Attempt to free unmapped color %02x/%02x/%02x!\n", color->r, color->g, color->b);
BREAKPOINT();
return GFX_ERROR;
}
if (color->global_index >= pal->max_colors_nr) {
GFXERROR("Attempt to free invalid color index %d (%02x/%02x/%02x)\n", color->global_index, color->r, color->g, color->b);
return GFX_ERROR;
}
if (!palette_color->lockers) {
GFXERROR("Attempt to free unused color index %d (%02x/%02x/%02x)\n", color->global_index, color->r, color->g, color->b);
return GFX_ERROR;
}
if (palette_color->lockers != GFX_COLOR_SYSTEM)
--(palette_color->lockers);
color->global_index = GFX_COLOR_INDEX_UNMAPPED;
return GFX_OK;
}
gfx_pixmap_t *gfx_pixmap_scale_index_data(gfx_pixmap_t *pixmap, gfx_mode_t *mode) {
byte *old_data, *new_data, *initial_new_data;
byte *linestart;
int linewidth;
int xl, yl;
int i, yc;
int xfact = mode->xfact;
int yfact = mode->yfact;
if (xfact == 1 && yfact == 1)
return pixmap;
if (!pixmap)
return NULL;
if (pixmap->flags & GFX_PIXMAP_FLAG_SCALED_INDEX)
return pixmap; // Already done
old_data = pixmap->index_data;
if (!old_data) {
GFXERROR("Attempt to scale index data without index data!\n");
return pixmap;
}
xl = pixmap->index_xl;
yl = pixmap->index_yl;
linewidth = xfact * xl;
initial_new_data = new_data = (byte *)sci_malloc(linewidth * yfact * yl);
for (yc = 0; yc < yl; yc++) {
linestart = new_data;
if (xfact == 1) {
memcpy(new_data, old_data, linewidth);
new_data += linewidth;
old_data += linewidth;
} else for (i = 0; i < xl; i++) {
byte fillc = *old_data++;
memset(new_data, fillc, xfact);
new_data += xfact;
}
for (i = 1; i < yfact; i++) {
memcpy(new_data, linestart, linewidth);
new_data += linewidth;
}
}
free(pixmap->index_data);
pixmap->index_data = initial_new_data;
pixmap->flags |= GFX_PIXMAP_FLAG_SCALED_INDEX;
pixmap->index_xl = linewidth;
pixmap->index_yl *= yfact;
return pixmap;
}
} // End of namespace Sci
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