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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 "engines/stark/gfx/openglbitmap.h"
#include "engines/stark/gfx/driver.h"
#include "graphics/surface.h"
#if defined(USE_OPENGL_GAME) || defined(USE_OPENGL_SHADERS)
#include "graphics/opengl/context.h"
namespace Stark {
namespace Gfx {
OpenGlBitmap::OpenGlBitmap() :
Bitmap(),
_id(0) {
glGenTextures(1, &_id);
bind();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
OpenGlBitmap::~OpenGlBitmap() {
glDeleteTextures(1, &_id);
}
void OpenGlBitmap::bind() const {
glBindTexture(GL_TEXTURE_2D, _id);
}
void OpenGlBitmap::update(const Graphics::Surface *surface, const byte *palette) {
bind();
_width = surface->w;
_height = surface->h;
if (surface->format != Driver::getRGBAPixelFormat()) {
// Convert the surface to texture format
Graphics::Surface *convertedSurface = surface->convertTo(Driver::getRGBAPixelFormat(), palette);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, convertedSurface->w, convertedSurface->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, convertedSurface->getPixels());
convertedSurface->free();
delete convertedSurface;
} else {
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, surface->w, surface->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, surface->getPixels());
}
}
void OpenGlBitmap::setSamplingFilter(Bitmap::SamplingFilter filter) {
switch (filter) {
case kNearest:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
break;
case kLinear:
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
break;
default:
warning("Unhandled sampling filter %d", filter);
}
}
Graphics::PixelFormat OpenGlBitmap::getBestPixelFormat() const {
return Driver::getRGBAPixelFormat();
}
} // End of namespace Gfx
} // End of namespace Stark
#endif // defined(USE_OPENGL_GAME) || defined(USE_OPENGL_SHADERS)
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