atari-surface.h

/* 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_SURFACE_H
#define BACKENDS_GRAPHICS_ATARI_SURFACE_H

#include "graphics/managed_surface.h"

#include "backends/graphics/atari/atari-supervidel.h"

constexpr Graphics::PixelFormat PIXELFORMAT_CLUT8  = Graphics::PixelFormat::createFormatCLUT8();
constexpr Graphics::PixelFormat PIXELFORMAT_RGB332 = Graphics::PixelFormat(1, 3, 3, 2, 0, 5, 2, 0, 0);
constexpr Graphics::PixelFormat PIXELFORMAT_RGB121 = Graphics::PixelFormat(1, 1, 2, 1, 0, 3, 1, 0, 0);

class AtariSurface : public Graphics::ManagedSurface {
public:
    AtariSurface() = default;
    AtariSurface(int16 width, int16 height, const Graphics::PixelFormat &pixelFormat);
    ~AtariSurface() override;

    using Graphics::ManagedSurface::create;
    void create(int16 width, int16 height, const Graphics::PixelFormat &pixelFormat) final override;
    void free() final override;

    void addDirtyRect(const Common::Rect &r) final override {};

    // no override as ManagedSurface::copyRectToSurface is not a virtual function!
    virtual void copyRectToSurface(const void *buffer, int srcPitch, int destX, int destY, int width, int height);
    virtual void copyRectToSurface(const Graphics::Surface &srcSurface, int destX, int destY, const Common::Rect &subRect) {
        assert(subRect.left % 16 == 0);
        assert(srcSurface.format == format);

        copyRectToSurface(
            srcSurface.getBasePtr(subRect.left, subRect.top), srcSurface.pitch,
            destX, destY,
            subRect.width(), subRect.height());
    }

    virtual void drawMaskedSprite(const Graphics::Surface &srcSurface, const Graphics::Surface &srcMask,
                                  const Graphics::Surface &boundingSurface,
                                  int destX, int destY,
                                  const Common::Rect &subRect);

    int getBitsPerPixel() const {
        return format == PIXELFORMAT_RGB121 ? 4 : 8;
    }

    static Common::Rect alignRect(int x1, int y1, int x2, int y2) {
        // make non-virtual for performance reasons
        return g_hasSuperVidel
           ? Common::Rect(x1, y1, x2, y2)
           : Common::Rect(x1 & (-16), y1, (x2 + 15) & (-16), y2);
    }
    static Common::Rect alignRect(const Common::Rect &rect) {
        // make non-virtual for performance reasons
        return g_hasSuperVidel
           ? rect
           : Common::Rect(rect.left & (-16), rect.top, (rect.right + 15) & (-16), rect.bottom);
    }
};

#ifdef USE_SUPERVIDEL
class SuperVidelSurface final : public AtariSurface {
public:
    SuperVidelSurface() = default;
    SuperVidelSurface(int16 width, int16 height, const Graphics::PixelFormat &pixelFormat)
        : AtariSurface(width, height, pixelFormat) {
    }

    //using Graphics::ManagedSurface::copyRectToSurface;
    void copyRectToSurface(const void *buffer, int srcPitch, int destX, int destY, int width, int height) override {
        Graphics::ManagedSurface::copyRectToSurface(buffer, srcPitch, destX, destY, width, height);
    }
    void copyRectToSurface(const Graphics::Surface &srcSurface, int destX, int destY, const Common::Rect &subRect) override {
        Graphics::ManagedSurface::copyRectToSurface(srcSurface, destX, destY, subRect);
    }

    void drawMaskedSprite(const Graphics::Surface &srcSurface, const Graphics::Surface &srcMask,
                          const Graphics::Surface &boundingSurface,
                          int destX, int destY,
                          const Common::Rect &subRect) override {
#ifdef USE_SV_BLITTER
        g_blitMask = (const byte *)srcMask.getBasePtr(subRect.left, subRect.top);
#endif
        copyRectToSurfaceWithKey(srcSurface, destX, destY, subRect, 0);
#ifdef USE_SV_BLITTER
        g_blitMask = nullptr;
#endif
    }
};
#endif

void AtariSurfaceInit();
void AtariSurfaceDeinit();

#endif // BACKENDS_GRAPHICS_ATARI_SURFACE_H