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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/>.
*
*/
#include "common/system.h"
#include "common/config-manager.h"
#include "math/matrix4.h"
#include "engines/stark/gfx/tinygl.h"
#include "engines/stark/gfx/tinyglactor.h"
#include "engines/stark/gfx/tinyglbitmap.h"
#include "engines/stark/gfx/tinyglprop.h"
#include "engines/stark/gfx/tinyglsurface.h"
#include "engines/stark/gfx/tinyglfade.h"
#include "engines/stark/gfx/tinygltexture.h"
#include "engines/stark/scene.h"
#include "engines/stark/services/services.h"
#include "graphics/surface.h"
namespace Stark {
namespace Gfx {
TinyGLDriver::TinyGLDriver() {
}
TinyGLDriver::~TinyGLDriver() {
TinyGL::destroyContext();
}
void TinyGLDriver::init() {
computeScreenViewport();
TinyGL::createContext(kOriginalWidth, kOriginalHeight, g_system->getScreenFormat(), 512, true, ConfMan.getBool("dirtyrects"));
tglMatrixMode(TGL_PROJECTION);
tglLoadIdentity();
tglMatrixMode(TGL_MODELVIEW);
tglLoadIdentity();
tglDisable(TGL_LIGHTING);
}
void TinyGLDriver::setScreenViewport(bool noScaling) {
if (noScaling) {
_viewport = Common::Rect(g_system->getWidth(), g_system->getHeight());
_unscaledViewport = _viewport;
} else {
_viewport = _screenViewport;
_unscaledViewport = Common::Rect(kOriginalWidth, kOriginalHeight);
}
tglViewport(_viewport.left, _viewport.top, _viewport.width(), _viewport.height());
}
void TinyGLDriver::setViewport(const Common::Rect &rect) {
_viewport = Common::Rect(_screenViewport.width() * rect.width() / kOriginalWidth,
_screenViewport.height() * rect.height() / kOriginalHeight);
_viewport.translate(_screenViewport.left + _screenViewport.width() * rect.left / kOriginalWidth,
_screenViewport.top + _screenViewport.height() * rect.top / kOriginalHeight);
_unscaledViewport = rect;
tglViewport(_viewport.left, g_system->getHeight() - _viewport.bottom, _viewport.width(), _viewport.height());
}
void TinyGLDriver::clearScreen() {
tglClear(TGL_COLOR_BUFFER_BIT | TGL_DEPTH_BUFFER_BIT | TGL_STENCIL_BUFFER_BIT);
}
void TinyGLDriver::flipBuffer() {
Common::List<Common::Rect> dirtyAreas;
TinyGL::presentBuffer(dirtyAreas);
Graphics::Surface glBuffer;
TinyGL::getSurfaceRef(glBuffer);
if (!dirtyAreas.empty()) {
for (Common::List<Common::Rect>::iterator itRect = dirtyAreas.begin(); itRect != dirtyAreas.end(); ++itRect) {
g_system->copyRectToScreen(glBuffer.getBasePtr((*itRect).left, (*itRect).top), glBuffer.pitch,
(*itRect).left, (*itRect).top, (*itRect).width(), (*itRect).height());
}
}
g_system->updateScreen();
}
Texture *TinyGLDriver::createTexture() {
return new TinyGlTexture();
}
Bitmap *TinyGLDriver::createBitmap(const Graphics::Surface *surface, const byte *palette) {
TinyGlBitmap *texture = new TinyGlBitmap();
if (surface) {
texture->update(surface, palette);
}
return texture;
}
VisualActor *TinyGLDriver::createActorRenderer() {
return new TinyGLActorRenderer(this);
}
VisualProp *TinyGLDriver::createPropRenderer() {
return new TinyGLPropRenderer(this);
}
SurfaceRenderer *TinyGLDriver::createSurfaceRenderer() {
return new TinyGLSurfaceRenderer(this);
}
FadeRenderer *TinyGLDriver::createFadeRenderer() {
return new TinyGLFadeRenderer(this);
}
void TinyGLDriver::start2DMode() {
// This blend mode prevents color fringes due to filtering.
// It requires the textures to have their color values pre-multiplied
// with their alpha value. This is the "Premultiplied Alpha" technique.
tglBlendFunc(TGL_ONE, TGL_ONE_MINUS_SRC_ALPHA);
tglEnable(TGL_BLEND);
tglDisable(TGL_DEPTH_TEST);
tglDepthMask(TGL_FALSE);
}
void TinyGLDriver::end2DMode() {
tglDisable(TGL_BLEND);
tglEnable(TGL_DEPTH_TEST);
tglDepthMask(TGL_TRUE);
}
void TinyGLDriver::set3DMode() {
tglEnable(TGL_DEPTH_TEST);
tglDepthFunc(TGL_LESS);
// Stencil test are only used in rendering shadows
// They are manually enabled and disabled there
tglStencilFunc(TGL_EQUAL, 0, 0xFF);
tglStencilOp(TGL_KEEP, TGL_KEEP, TGL_INCR);
}
bool TinyGLDriver::computeLightsEnabled() {
return false;
}
Common::Rect TinyGLDriver::getViewport() const {
return _viewport;
}
Common::Rect TinyGLDriver::getUnscaledViewport() const {
return _unscaledViewport;
}
Graphics::Surface *TinyGLDriver::getViewportScreenshot() const {
Graphics::Surface *tmp = TinyGL::copyFromFrameBuffer(getRGBAPixelFormat());
Graphics::Surface *s = new Graphics::Surface();
s->create(_viewport.width(), _viewport.height(), getRGBAPixelFormat());
byte *src = (byte *)tmp->getPixels();
s->copyRectToSurface(src + tmp->pitch * _viewport.top + _viewport.left * tmp->format.bytesPerPixel,
tmp->pitch, 0, 0, _viewport.width(), _viewport.height());
tmp->free();
delete tmp;
return s;
}
} // End of namespace Gfx
} // End of namespace Stark
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