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/* ResidualVM - A 3D game interpreter
*
* ResidualVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the AUTHORS
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "engines/myst3/gfx_tinygl_texture.h"
#include "graphics/tinygl/zblit.h"
namespace Myst3 {
TinyGLTexture::TinyGLTexture(const Graphics::Surface *surface) {
width = surface->w;
height = surface->h;
format = surface->format;
if (format.bytesPerPixel == 4) {
internalFormat = TGL_RGBA;
sourceFormat = TGL_UNSIGNED_BYTE;
} else if (format.bytesPerPixel == 2) {
internalFormat = TGL_RGB;
sourceFormat = TGL_UNSIGNED_BYTE; // UNSIGNED_SHORT_5_6_5 not provided
} else
error("Unknown pixel format");
tglGenTextures(1, &id);
tglBindTexture(TGL_TEXTURE_2D, id);
tglTexImage2D(TGL_TEXTURE_2D, 0, 3, width, height, 0, internalFormat, sourceFormat, 0);
tglTexParameteri(TGL_TEXTURE_2D, TGL_TEXTURE_MIN_FILTER, TGL_LINEAR);
tglTexParameteri(TGL_TEXTURE_2D, TGL_TEXTURE_MAG_FILTER, TGL_LINEAR);
// NOTE: TinyGL doesn't have issues with white lines so doesn't need use TGL_CLAMP_TO_EDGE
tglTexParameteri(TGL_TEXTURE_2D, TGL_TEXTURE_WRAP_S, TGL_REPEAT);
tglTexParameteri(TGL_TEXTURE_2D, TGL_TEXTURE_WRAP_T, TGL_REPEAT);
_blitImage = Graphics::tglGenBlitImage();
update(surface);
}
TinyGLTexture::~TinyGLTexture() {
tglDeleteTextures(1, &id);
tglDeleteBlitImage(_blitImage);
}
void TinyGLTexture::update(const Graphics::Surface *surface) {
tglBindTexture(TGL_TEXTURE_2D, id);
tglTexImage2D(TGL_TEXTURE_2D, 0, 3, width, height, 0,
internalFormat, sourceFormat, const_cast<void *>(surface->getPixels())); // TESTME: Not sure if it works.
Graphics::tglUploadBlitImage(_blitImage, *surface, 0, false);
}
void TinyGLTexture::updatePartial(const Graphics::Surface *surface, const Common::Rect &rect) {
// FIXME: TinyGL does not support partial texture update
update(surface);
}
Graphics::BlitImage *TinyGLTexture::getBlitTexture() const {
return _blitImage;
}
} // End of namespace Myst3
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