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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef BACKENDS_GRAPHICS_ATARI_SUPERVIDEL_H
#define BACKENDS_GRAPHICS_ATARI_SUPERVIDEL_H
#ifdef USE_SUPERVIDEL
#include "backends/graphics/atari/atari-graphics.h"
#include <mint/osbind.h>
#ifdef USE_SV_BLITTER
#include <mint/trap14.h>
#define ct60_vm(mode, value) (long)trap_14_wwl((short)0xc60e, (short)(mode), (long)(value))
#define ct60_vmalloc(value) ct60_vm(0, value)
#define ct60_vmfree(value) ct60_vm(1, value)
#include "backends/platform/atari/dlmalloc.h"
extern mspace g_mspace;
#endif
#include "backends/graphics/atari/atari-graphics-superblitter.h"
#include "backends/platform/atari/atari-debug.h"
#include "common/scummsys.h"
class AtariSuperVidelManager : public AtariGraphicsManager {
public:
AtariSuperVidelManager() {
#ifdef USE_SV_BLITTER
atari_debug("SuperVidel FW Revision: %d, using %s", superVidelFwVersion, superVidelFwVersion >= 9
? "fast async FIFO" : "slower sync blitting");
#else
atari_debug("SuperVidel FW Revision: %d, SuperBlitter not used", superVidelFwVersion);
#endif
if (Supexec(hasSvRamBoosted))
atari_debug("SV_XBIOS has the pmmu boost enabled");
else
atari_warning("SV_XBIOS has the pmmu boost disabled, set 'pmmu_boost = true' in C:\\SV.INF");
#ifdef USE_SV_BLITTER
size_t vramSize = ct60_vmalloc(-1) - (16 * 1024 * 1024); // SV XBIOS seems to forget the initial 16 MB ST RAM mirror
_vramBase = vramSize > 0 ? (void *)ct60_vmalloc(vramSize) : nullptr;
if (_vramBase) {
g_mspace = create_mspace_with_base(_vramBase, vramSize, 0);
atari_debug("Allocated VRAM at %p (%ld bytes)", _vramBase, vramSize);
}
if (!g_mspace)
atari_warning("VRAM allocation failed");
#endif
// using virtual methods so must be done here
allocateSurfaces();
}
~AtariSuperVidelManager() {
// using virtual methods so must be done here
freeSurfaces();
#ifdef USE_SV_BLITTER
if (_vramBase) {
destroy_mspace(g_mspace);
g_mspace = nullptr;
ct60_vmfree(_vramBase);
_vramBase = nullptr;
}
#endif
}
private:
AtariMemAlloc getStRamAllocFunc() const override {
return [](size_t bytes) {
uintptr ptr = Mxalloc(bytes, MX_STRAM);
if (ptr != 0)
ptr |= 0xA0000000;
return (void*)ptr;
};
}
AtariMemFree getStRamFreeFunc() const override {
return [](void *ptr) { Mfree((uintptr)ptr & 0x00FFFFFF); };
}
void drawMaskedSprite(Graphics::Surface &dstSurface, int dstBitsPerPixel,
const Graphics::Surface &srcSurface, const Graphics::Surface &srcMask,
int destX, int destY,
const Common::Rect &subRect) override {
assert(dstBitsPerPixel == 8);
assert(subRect.width() % 16 == 0);
assert(subRect.width() == srcSurface.w);
const byte *src = (const byte *)srcSurface.getBasePtr(subRect.left, subRect.top);
const uint16 *mask = (const uint16 *)srcMask.getBasePtr(subRect.left, subRect.top);
byte *dst = (byte *)dstSurface.getBasePtr(destX, destY);
const int h = subRect.height();
const int w = subRect.width();
const int dstOffset = dstSurface.pitch - w;
for (int j = 0; j < h; ++j) {
for (int i = 0; i < w; i += 16, mask++) {
const uint16 m = *mask;
if (m == 0xFFFF) {
// all 16 pixels transparentm6
src += 16;
dst += 16;
continue;
}
for (int k = 0; k < 16; ++k) {
const uint16 bit = 1 << (15 - k);
if (m & bit) {
// transparent
src++;
dst++;
} else {
*dst++ = *src++;
}
}
}
dst += dstOffset;
}
}
Common::Rect alignRect(int x, int y, int w, int h) const override {
return Common::Rect(x, y, x + w, y + h);
}
static long hasSvRamBoosted() {
register long ret __asm__ ("d0") = 0;
__asm__ volatile(
"\tmovec %%itt0,%%d1\n"
"\tcmp.l #0xA007E060,%%d1\n"
"\tbne.s 1f\n"
"\tmovec %%dtt0,%%d1\n"
"\tcmp.l #0xA007E060,%%d1\n"
"\tbne.s 1f\n"
"\tmoveq #1,%%d0\n"
"1:\n"
: "=g"(ret) /* outputs */
: /* inputs */
: __CLOBBER_RETURN("d0") "d1", "cc"
);
return ret;
}
#ifdef USE_SV_BLITTER
void *_vramBase = nullptr;
#endif
};
#endif // USE_SUPERVIDEL
#endif
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