1 /*
2 * DISTRHO Plugin Framework (DPF)
3 * Copyright (C) 2012-2019 Filipe Coelho <falktx@falktx.com>
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any purpose with
6 * or without fee is hereby granted, provided that the above copyright notice and this
7 * permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
10 * TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
11 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
13 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include "WidgetPrivateData.hpp"
18
19 #ifdef DGL_CAIRO
20 # include "../Cairo.hpp"
21 #endif
22 #ifdef DGL_OPENGL
23 # include "../OpenGL.hpp"
24 #endif
25
26 START_NAMESPACE_DGL
27
28 // -----------------------------------------------------------------------
29
display(const uint width,const uint height,const double scaling,const bool renderingSubWidget)30 void Widget::PrivateData::display(const uint width,
31 const uint height,
32 const double scaling,
33 const bool renderingSubWidget)
34 {
35 if ((skipDisplay && ! renderingSubWidget) || size.isInvalid() || ! visible)
36 return;
37
38 #ifdef DGL_OPENGL
39 bool needsDisableScissor = false;
40
41 // reset color
42 glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
43
44 if (needsFullViewport || (absolutePos.isZero() && size == Size<uint>(width, height)))
45 {
46 // full viewport size
47 glViewport(0,
48 -(height * scaling - height),
49 width * scaling,
50 height * scaling);
51 }
52 else if (needsScaling)
53 {
54 // limit viewport to widget bounds
55 glViewport(absolutePos.getX(),
56 height - self->getHeight() - absolutePos.getY(),
57 self->getWidth(),
58 self->getHeight());
59 }
60 else
61 {
62 // only set viewport pos
63 glViewport(absolutePos.getX() * scaling,
64 -std::round((height * scaling - height) + (absolutePos.getY() * scaling)),
65 std::round(width * scaling),
66 std::round(height * scaling));
67
68 // then cut the outer bounds
69 glScissor(absolutePos.getX() * scaling,
70 height - std::round((self->getHeight() + absolutePos.getY()) * scaling),
71 std::round(self->getWidth() * scaling),
72 std::round(self->getHeight() * scaling));
73
74 glEnable(GL_SCISSOR_TEST);
75 needsDisableScissor = true;
76 }
77 #endif
78
79 #ifdef DGL_CAIRO
80 cairo_t* cr = parent.getGraphicsContext().cairo;
81 cairo_matrix_t matrix;
82 cairo_get_matrix(cr, &matrix);
83 cairo_translate(cr, absolutePos.getX(), absolutePos.getY());
84 // TODO: scaling and cropping
85 #endif
86
87 // display widget
88 self->onDisplay();
89
90 #ifdef DGL_CAIRO
91 cairo_set_matrix(cr, &matrix);
92 #endif
93
94 #ifdef DGL_OPENGL
95 if (needsDisableScissor)
96 {
97 glDisable(GL_SCISSOR_TEST);
98 needsDisableScissor = false;
99 }
100 #endif
101
102 displaySubWidgets(width, height, scaling);
103 }
104
105 // -----------------------------------------------------------------------
106
107 END_NAMESPACE_DGL
108