1 /* ResidualVM - A 3D game interpreter
2 *
3 * ResidualVM is the legal property of its developers, whose names
4 * are too numerous to list here. Please refer to the AUTHORS
5 * file distributed with this source distribution.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 *
21 */
22
23 #include "engines/stark/gfx/openglssurface.h"
24
25 #include "engines/stark/gfx/opengls.h"
26 #include "engines/stark/gfx/texture.h"
27
28 #include "graphics/opengl/shader.h"
29
30 namespace Stark {
31 namespace Gfx {
32
OpenGLSSurfaceRenderer(OpenGLSDriver * gfx)33 OpenGLSSurfaceRenderer::OpenGLSSurfaceRenderer(OpenGLSDriver *gfx) :
34 SurfaceRenderer(),
35 _gfx(gfx) {
36 _shader = _gfx->createSurfaceShaderInstance();
37 }
38
~OpenGLSSurfaceRenderer()39 OpenGLSSurfaceRenderer::~OpenGLSSurfaceRenderer() {
40 delete _shader;
41 }
42
render(const Texture * texture,const Common::Point & dest)43 void OpenGLSSurfaceRenderer::render(const Texture *texture, const Common::Point &dest) {
44 // Destination rectangle
45 const float sLeft = dest.x;
46 const float sTop = dest.y;
47 const float sWidth = texture->width();
48 const float sHeight = texture->height();
49
50 _gfx->start2DMode();
51
52 _shader->use();
53 _shader->setUniform1f("fadeLevel", _fadeLevel);
54 _shader->setUniform("verOffsetXY", normalizeOriginalCoordinates(sLeft, sTop));
55 if (_noScalingOverride) {
56 _shader->setUniform("verSizeWH", normalizeCurrentCoordinates(sWidth, sHeight));
57 } else {
58 _shader->setUniform("verSizeWH", normalizeOriginalCoordinates(sWidth, sHeight));
59 }
60
61 texture->bind();
62 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
63
64 _shader->unbind();
65 _gfx->end2DMode();
66 }
67
normalizeOriginalCoordinates(float x,float y) const68 Math::Vector2d OpenGLSSurfaceRenderer::normalizeOriginalCoordinates(float x, float y) const {
69 Common::Rect viewport = _gfx->getUnscaledViewport();
70 return Math::Vector2d(x / (float)viewport.width(), y / (float)viewport.height());
71 }
72
normalizeCurrentCoordinates(float x,float y) const73 Math::Vector2d OpenGLSSurfaceRenderer::normalizeCurrentCoordinates(float x, float y) const {
74 Common::Rect viewport = _gfx->getViewport();
75 return Math::Vector2d(x / (float)viewport.width(), y / (float)viewport.height());
76 }
77
78 } // End of namespace Gfx
79 } // End of namespace Stark
80