From bbfc93a5b990d1009777de1fbd3efd51508f18ce Mon Sep 17 00:00:00 2001
From: pixel <pixel>
Date: Sun, 29 Feb 2004 17:44:42 +0000
Subject: First crude try of implementing BS encoding
---
lib/luapsx.cpp | 268 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 266 insertions(+), 2 deletions(-)
(limited to 'lib')
diff --git a/lib/luapsx.cpp b/lib/luapsx.cpp
index 0665d05..14dc1e3 100644
--- a/lib/luapsx.cpp
+++ b/lib/luapsx.cpp
@@ -17,9 +17,273 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-/* $Id: luapsx.cpp,v 1.1 2004-02-27 04:13:32 pixel Exp $ */
+/* $Id: luapsx.cpp,v 1.2 2004-02-29 17:44:42 pixel Exp $ */
+#include <LuaHandle.h>
#include "luapsx.h"
+#include "generic.h"
-void Luapsx::pushstatics(Lua * L) throw (GeneralException) {
+void over(Byte * d, Byte R, Byte G, Byte B, Byte A) {
+ d[0] = R;
+ d[1] = G;
+ d[2] = B;
+}
+
+void alpha(Byte * d, Byte R, Byte G, Byte B, Byte A) {
+ A = MIN(A, (Byte) 128);
+ d[0] = ((int)d[0] * (128 - A) + R * A) >> 7;
+ d[1] = ((int)d[1] * (128 - A) + G * A) >> 7;
+ d[2] = ((int)d[2] * (128 - A) + B * A) >> 7;
+}
+
+void lighten(Byte * d, Byte R, Byte G, Byte B, Byte A) {
+ A = MIN(A, (Byte) 128);
+ R = ((int)d[0] * (128 - A) + R * A) >> 7;
+ G = ((int)d[1] * (128 - A) + G * A) >> 7;
+ B = ((int)d[2] * (128 - A) + B * A) >> 7;
+ d[0] = MAX(R, d[0]);
+ d[1] = MAX(G, d[1]);
+ d[2] = MAX(B, d[2]);
+}
+
+void darken(Byte * d, Byte R, Byte G, Byte B, Byte A) {
+ A = MIN(A, (Byte) 128);
+ R = ((int)d[0] * (128 - A) + R * A) >> 7;
+ G = ((int)d[1] * (128 - A) + G * A) >> 7;
+ B = ((int)d[2] * (128 - A) + B * A) >> 7;
+ d[0] = MIN(R, d[0]);
+ d[1] = MIN(G, d[1]);
+ d[2] = MIN(B, d[2]);
+}
+
+enum {
+ BLIT_OVER = 0,
+ BLIT_OVER32,
+ BLIT_ALPHA,
+ BLIT_LIGHTEN,
+ BLIT_LIGHTEN32,
+ BLIT_DARKEN,
+ BLIT_DARKEN32,
+};
+
+typedef void psx;
+
+enum psx_functions_t {
+ PSX_BSDECODE = 0,
+ PSX_BSENCODE,
+ PSX_BLIT,
+};
+
+struct lua_functypes_t psx_functions[] = {
+ { PSX_BSDECODE, "bsdecode", 3, 3, { LUA_OBJECT, LUA_NUMBER, LUA_NUMBER } },
+ { PSX_BSENCODE, "bsencode", 3, 5, { LUA_OBJECT, LUA_NUMBER, LUA_NUMBER, LUA_NUMBER, LUA_NUMBER } },
+ { PSX_BLIT, "blit", 9, 9, { LUA_OBJECT, LUA_OBJECT, LUA_NUMBER, LUA_NUMBER, LUA_NUMBER, LUA_NUMBER, LUA_NUMBER, LUA_NUMBER, LUA_NUMBER } },
+ { -1, 0, 0, 0, 0 }
+};
+
+class sLua_psx : public Base {
+ public:
+ DECLARE_FUNCTION(psx, PSX_BSDECODE);
+ private:
+ static int psx_proceed_statics(Lua * L, int n, int caller);
+};
+
+void Luapsx::pushstatics(Lua * L) throw (GeneralException ) {
+ CHECK_FUNCTIONS(psx);
+
+ PUSH_FUNCTION(psx, PSX_BSDECODE);
+
+ L->push("BLIT_OVER");
+ L->push((lua_Number) BLIT_OVER);
+ L->settable(LUA_GLOBALSINDEX);
+
+ L->push("BLIT_OVER32");
+ L->push((lua_Number) BLIT_OVER32);
+ L->settable(LUA_GLOBALSINDEX);
+
+ L->push("BLIT_ALPHA");
+ L->push((lua_Number) BLIT_ALPHA);
+ L->settable(LUA_GLOBALSINDEX);
+
+ L->push("BLIT_LIGHTEN");
+ L->push((lua_Number) BLIT_LIGHTEN);
+ L->settable(LUA_GLOBALSINDEX);
+
+ L->push("BLIT_LIGHTEN32");
+ L->push((lua_Number) BLIT_LIGHTEN32);
+ L->settable(LUA_GLOBALSINDEX);
+
+ L->push("BLIT_DARKEN");
+ L->push((lua_Number) BLIT_DARKEN);
+ L->settable(LUA_GLOBALSINDEX);
+
+ L->push("BLIT_DARKEN32");
+ L->push((lua_Number) BLIT_DARKEN32);
+ L->settable(LUA_GLOBALSINDEX);
+}
+
+int sLua_psx::psx_proceed_statics(Lua * L, int n, int caller) {
+ int r = 0;
+
+ switch (caller) {
+ case PSX_BSDECODE:
+ r = 1;
+ {
+ Buffer * b = new Buffer(true);
+ Handle * f = (Handle *) LuaObject::getme(L, 1);
+ int width = L->tonumber(2);
+ int height = L->tonumber(3);
+ Byte * in = (Byte *) malloc(f->GetSize() + 10);
+ Byte * out = (Byte *) malloc(width * height * 3);
+ LuaBuffer lb(b);
+ lb.pushdestruct(L);
+ f->read(in, f->GetSize());
+ bs_decode_rgb24(out, (bs_header_t *) in, width, height, 0);
+ for (int i = 0; i < width * height * 3; i++) {
+ b[i] = out[i];
+ }
+ free(out);
+ free(in);
+ }
+ case PSX_BSENCODE:
+ r = 3;
+ {
+ unsigned short out[0x80000];
+ Buffer * b = new Buffer(true);
+ LuaBuffer lb(b);
+ lb.pushdestruct(L);
+ Handle * f = (Handle *) LuaObject::getme(L, 1);
+ bs_input_image_t img;
+ img.width = L->tonumber(2);
+ img.height = L->tonumber(3);
+ int max_size = 14112, cur_size;
+ int q_scale = 1;
+ if (n >= 4)
+ max_size = L->tonumber(4);
+ if (n >= 5)
+ q_scale = L->tonumber(5);
+ img.lpbits = (Byte *) malloc(f->GetSize());
+ img.top = img.lpbits;
+ img.nextline = img.width * 3;
+ img.bit = 24;
+
+ f->read(img.lpbits, f->GetSize());
+
+ bs_init();
+
+ cur_size = max_size + 1;
+
+ for (cur_size = max_size + 1; max_size < cur_size; q_scale++) {
+ cur_size = bs_encode((bs_header_t *) out, &img, 2, q_scale, 0);
+ }
+
+ for (int i = 0; i < cur_size; i++) {
+ b[i] = out[i];
+ }
+
+ L->push((lua_Number) cur_size);
+ L->push((lua_Number) q_scale);
+ }
+ case PSX_BLIT:
+ r = 0;
+ {
+ Handle * d = (Handle *) LuaObject::getme(L, 1);
+ Handle * s = (Handle *) LuaObject::getme(L, 2);
+ int dw = L->tonumber(3),
+ dh = L->tonumber(4),
+ sw = L->tonumber(5),
+ sh = L->tonumber(6),
+ sx = L->tonumber(7),
+ sy = L->tonumber(8),
+ bl = L->tonumber(9);
+ int bytes, dstart = 0, dskip = 0, sstart = 0, sskip = 0, i, j;
+ Byte RGB[3], R, G, B, A = 128;
+ void (*op_func)(Byte *, Byte, Byte, Byte, Byte);
+
+ switch(bl) {
+ case BLIT_OVER:
+ bytes = 3;
+ op_func = over;
+ break;
+ case BLIT_OVER32:
+ bytes = 4;
+ op_func = over;
+ break;
+ case BLIT_ALPHA:
+ bytes = 4;
+ op_func = alpha;
+ break;
+ case BLIT_LIGHTEN:
+ bytes = 3;
+ op_func = lighten;
+ break;
+ case BLIT_LIGHTEN32:
+ bytes = 4;
+ op_func = lighten;
+ break;
+ case BLIT_DARKEN:
+ bytes = 3;
+ op_func = darken;
+ break;
+ case BLIT_DARKEN32:
+ bytes = 4;
+ op_func = darken;
+ break;
+ default:
+ L->error("Blitting operation unknown.");
+ return 0;
+ }
+
+ if (sy < 0) {
+ sstart += sw * bytes * sy;
+ sh -= sy;
+ sy = 0;
+ } else {
+ dstart += dw * 3 * sy;
+ }
+
+ if ((sy + sh) > dh) {
+ sh -= (sy + sh) - dh;
+ }
+
+ if (sx < 0) {
+ sstart += sx * bytes;
+ sskip += sx * bytes;
+ sw -= sx;
+ sx = 0;
+ } else {
+ dstart += sx * 3;
+ }
+
+ if ((sx + sw) > dw) {
+ sskip += (sx + sw) - dw;
+ sw -= (sx + sw) - dw;
+ }
+
+ dskip = (dw - sw) * 3;
+
+ d->seek(dstart);
+ s->seek(sstart);
+
+ for (i = 0; i < sh; i++, s->seek(sskip, SEEK_CUR), d->seek(dskip, SEEK_CUR)) {
+ for (j = 0; j < sw; j++) {
+ RGB[0] = d->readU8();
+ RGB[1] = d->readU8();
+ RGB[2] = d->readU8();
+ d->seek(-3, SEEK_CUR);
+ R = s->readU8();
+ G = s->readU8();
+ B = s->readU8();
+ if (bytes == 4)
+ A = s->readU8();
+ op_func(RGB, R, G, B, A);
+ d->writeU8(R);
+ d->writeU8(G);
+ d->writeU8(B);
+ }
+ }
+
+ }
+ }
+ return r;
}
--
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