1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/* 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/openglsurface.h"
#include "engines/stark/gfx/bitmap.h"
#include "engines/stark/gfx/color.h"
#if defined(USE_OPENGL_GAME)
namespace Stark {
namespace Gfx {
static const GLfloat textCords[] = {
// S T
0.0f, 0.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
};
OpenGLSurfaceRenderer::OpenGLSurfaceRenderer(OpenGLDriver *gfx) :
SurfaceRenderer(),
_gfx(gfx) {
}
OpenGLSurfaceRenderer::~OpenGLSurfaceRenderer() {
}
void OpenGLSurfaceRenderer::render(const Bitmap *bitmap, const Common::Point &dest) {
render(bitmap, dest, bitmap->width(), bitmap->height());
}
void OpenGLSurfaceRenderer::render(const Bitmap *bitmap, const Common::Point &dest, uint width, uint height) {
// Destination rectangle with given width and height
_gfx->start2DMode();
SurfaceVertex vertices[4] = {};
convertToVertices(vertices, dest, width, height);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glEnable(GL_TEXTURE_2D);
glDisableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
glVertexPointer(2, GL_FLOAT, sizeof(SurfaceVertex), &vertices[0].x);
glTexCoordPointer(2, GL_FLOAT, 2 * sizeof(float), textCords);
glColor3f(1.0f - _fadeLevel, 1.0f - _fadeLevel, 1.0f - _fadeLevel);
bitmap->bind();
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
_gfx->end2DMode();
}
void OpenGLSurfaceRenderer::fill(const Color &color, const Common::Point &dest, uint width, uint height) {
_gfx->start2DMode();
SurfaceVertex vertices[4] = {};
convertToVertices(vertices, dest, width, height);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glDisable(GL_TEXTURE_2D);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(2, GL_FLOAT, sizeof(SurfaceVertex), &vertices[0].x);
glColor4f((color.r / 255.0f) - _fadeLevel, (color.g / 255.0f) - _fadeLevel, (color.b / 255.0f) - _fadeLevel, color.a / 255.0f);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisableClientState(GL_VERTEX_ARRAY);
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
_gfx->end2DMode();
}
void OpenGLSurfaceRenderer::convertToVertices(SurfaceVertex *vertices, const Common::Point &dest, uint width, uint height) const {
const Math::Vector2d surfaceVertices[] = {
// X Y
{ 0.0f, 0.0f },
{ 1.0f, 0.0f },
{ 0.0f, 1.0f },
{ 1.0f, 1.0f },
};
Math::Vector2d verSizeWH;
if (_noScalingOverride) {
verSizeWH = normalizeCurrentCoordinates(width, height);
} else {
verSizeWH = normalizeOriginalCoordinates(width, height);
}
auto verOffsetXY = normalizeOriginalCoordinates(dest.x, dest.y);
auto nativeViewport = _gfx->getViewport();
auto viewport = Math::Vector2d(nativeViewport.width(), nativeViewport.height());
for (int32 v = 0; v < 4; v++) {
Math::Vector2d pos = verOffsetXY + (surfaceVertices[v] * verSizeWH);
if (_snapToGrid) {
// Align vertex coordinates to the native pixel grid
// This ensures text does not get garbled by nearest neighbors scaling
pos.setX(floor(pos.getX() * viewport.getX() + 0.5) / viewport.getX());
pos.setY(floor(pos.getY() * viewport.getY() + 0.5) / viewport.getY());
}
// position coords
vertices[v].x = pos.getX() * 2.0 - 1.0;
vertices[v].y = -1.0 * (pos.getY() * 2.0 - 1.0);
}
}
Math::Vector2d OpenGLSurfaceRenderer::normalizeOriginalCoordinates(int x, int y) const {
Common::Rect viewport = _gfx->getUnscaledViewport();
return Math::Vector2d(x / (float)viewport.width(), y / (float)viewport.height());
}
Math::Vector2d OpenGLSurfaceRenderer::normalizeCurrentCoordinates(int x, int y) const {
Common::Rect viewport = _gfx->getViewport();
return Math::Vector2d(x / (float)viewport.width(), y / (float)viewport.height());
}
} // End of namespace Gfx
} // End of namespace Stark
#endif // if defined(USE_OPENGL_GAME)
|
