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HOPKINS: Refactored the PCX decoder to use the existing ScummVM decoder

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This commit is contained in:
Paul Gilbert 2012-11-11 21:33:17 +11:00
parent 9fd36c32f2
commit 75eaa297c6
1 changed files with 17 additions and 120 deletions
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137
engines/hopkins/graphics.cpp
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@ -22,6 +22,7 @@
#include "common/system.h"
#include "graphics/palette.h"
#include "graphics/decoders/pcx.h"
#include "common/file.h"
#include "common/rect.h"
#include "engines/util.h"
@ -325,147 +326,43 @@ void GraphicsManager::Trans_bloc2(byte *surface, byte *col, int size) {
// TODO: See if it's feasible and/or desirable to change this to use the Common PCX decoder
void GraphicsManager::A_PCX640_480(byte *surface, const Common::String &file, byte *palette, bool typeFlag) {
int filesize;
int v6;
int v7;
int v8;
int v9;
int v10;
int v11;
byte v12;
int v13;
int v14;
char v15;
int v18;
int v19;
int v20;
unsigned int v21;
int v22;
int32 v23;
byte *ptr;
Common::File f;
Graphics::PCXDecoder pcxDecoder;
// Clear the passed surface
memset(surface, 0, SCREEN_WIDTH * 2 * SCREEN_HEIGHT);
if (typeFlag) {
// Load PCX from within the PIC resource
_vm->_fileManager.CONSTRUIT_FICHIER(_vm->_globals.HOPIMAGE, "PIC.RES");
if (!f.open(_vm->_globals.NFICHIER))
error("(nom)Erreur en cours de lecture.");
f.seek(_vm->_globals.CAT_POSI);
v7 = _vm->_globals.CAT_TAILLE - 896;
v8 = f.read(HEADER_PCX, 128);
v6 = (int16)READ_LE_UINT16(&HEADER_PCX[8]) + 1;
v20 = (int16)READ_LE_UINT16(&HEADER_PCX[10]) + 1;
if (((int16)READ_LE_UINT16(&HEADER_PCX[8]) + 1) <= SCREEN_WIDTH) {
DOUBLE_ECRAN = false;
} else {
v6 = SCREEN_WIDTH * 2;
DOUBLE_ECRAN = true;
}
if (v20 > SCREEN_HEIGHT)
v20 = SCREEN_HEIGHT;
PCX_L = v6;
PCX_H = v20;
if (v8 == -1)
error("Erreur en cours de lecture.");
} else {
// Load stand alone PCX file
_vm->_fileManager.CONSTRUIT_FICHIER(_vm->_globals.HOPIMAGE, file);
if (!f.open(_vm->_globals.NFICHIER))
error("(nom)Erreur en cours de lecture.");
filesize = f.size();
int bytesRead = f.read(HEADER_PCX, 128);
if (bytesRead < 128)
error("Erreur en cours de lecture.");
v6 = (int16)READ_LE_UINT16(&HEADER_PCX[8]) + 1;
v20 = (int16)READ_LE_UINT16(&HEADER_PCX[10]) + 1;
if (v6 <= SCREEN_WIDTH) {
DOUBLE_ECRAN = false;
} else {
v6 = SCREEN_WIDTH * 2;
DOUBLE_ECRAN = true;
}
if (v20 > SCREEN_HEIGHT)
v20 = SCREEN_HEIGHT;
PCX_L = v6;
PCX_H = v20;
v7 = filesize - 896;
}
ptr = _vm->_globals.dos_malloc2(0xEE60u);
if (v7 >= 60000) {
v21 = v7 / 60000 + 1;
v23 = 60000 * (v7 / 60000) - v7;
if (((uint32)v23 & 0x80000000u) != 0)
v23 = -v23;
f.read(ptr, 60000);
v7 = 60000;
} else {
v21 = 1;
v23 = v7;
f.read(ptr, v7);
}
v22 = v21 - 1;
v18 = 0;
v9 = 0;
v10 = 0;
v19 = v6;
do {
if (v9 == v7) {
v9 = 0;
--v22;
v7 = 60000;
if ( !v22 )
v7 = v23;
v11 = v10;
f.read(ptr, v7);
v10 = v11;
}
// Decode the PCX
if (!pcxDecoder.loadStream(f))
error("Error decoding PCX");
v12 = *((byte *)ptr + v9++);
if (v12 > 0xC0u) {
v13 = v12 - 192;
if (v9 == v7) {
v9 = 0;
--v22;
v7 = 60000;
if ( v22 == 1 )
v7 = v23;
v14 = v10;
f.read(ptr, v7);
v10 = v14;
}
v15 = *((byte *)ptr + v9++);
const Graphics::Surface *s = pcxDecoder.getSurface();
// Copy out the dimensions and pixels of the decoded surface
DOUBLE_ECRAN = s->w > SCREEN_WIDTH;
PCX_L = s->w;
PCX_H = s->h;
Common::copy((byte *)s->pixels, (byte *)s->pixels + (s->pitch * s->h), surface);
do {
*((byte *)surface + v10++) = v15;
++v18;
--v13;
} while (v13);
} else {
*((byte *)surface + v10++) = v12;
++v18;
}
} while (v18 < v19 * v20);
if (typeFlag) {
f.seek(_vm->_globals.CAT_TAILLE + _vm->_globals.CAT_POSI - 768);
} else {
filesize = f.size();
f.seek(filesize - 768);
}
if (f.read(palette, PALETTE_BLOCK_SIZE) != (PALETTE_BLOCK_SIZE))
error("A_PCX640_480");
// Copy out the palette
const byte *palSrc = pcxDecoder.getPalette();
Common::copy((byte *)palSrc, (byte *)palSrc + PALETTE_BLOCK_SIZE, palette);
f.close();
_vm->_globals.dos_free2(ptr);
}
// Clear Palette