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engines/myst3/gfx_tinygl_texture.cpp

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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/myst3/gfx_tinygl_texture.h"
+
+#include "graphics/tinygl/tinygl.h"
+
+namespace Myst3 {
+
+TinyGLTexture2D::TinyGLTexture2D(const Graphics::Surface *surface) {
+	width = surface->w;
+	height = surface->h;
+	format = surface->format;
+
+	_blitImage = tglGenBlitImage();
+
+	update(surface);
+}
+
+TinyGLTexture2D::~TinyGLTexture2D() {
+	tglDeleteBlitImage(_blitImage);
+}
+
+void TinyGLTexture2D::update(const Graphics::Surface *surface) {
+	tglUploadBlitImage(_blitImage, *surface, 0, false);
+}
+
+void TinyGLTexture2D::updatePartial(const Graphics::Surface *surface, const Common::Rect &rect) {
+	// FIXME: TinyGL does not support partial texture update
+	update(surface);
+}
+
+TinyGL::BlitImage *TinyGLTexture2D::getBlitTexture() const {
+	return _blitImage;
+}
+
+TinyGLTexture3D::TinyGLTexture3D(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_SHORT_5_6_5;
+	} else
+		error("Unknown pixel format");
+
+	tglGenTextures(1, &id);
+	tglBindTexture(TGL_TEXTURE_2D, id);
+	tglTexImage2D(TGL_TEXTURE_2D, 0, internalFormat, width, height, 0, internalFormat, sourceFormat, nullptr);
+	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);
+	update(surface);
+}
+
+TinyGLTexture3D::~TinyGLTexture3D() {
+	tglDeleteTextures(1, &id);
+}
+
+void TinyGLTexture3D::update(const Graphics::Surface *surface) {
+	tglBindTexture(TGL_TEXTURE_2D, id);
+	tglTexImage2D(TGL_TEXTURE_2D, 0, internalFormat, width, height, 0,
+	              internalFormat, sourceFormat, const_cast<void *>(surface->getPixels())); // TESTME: Not sure if it works.
+}
+
+void TinyGLTexture3D::updatePartial(const Graphics::Surface *surface, const Common::Rect &rect) {
+	// FIXME: TinyGL does not support partial texture update
+	update(surface);
+}
+
+} // End of namespace Myst3