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39 | |
40 | #include "qsgflatcolormaterial.h" |
41 | #include <private/qsgmaterialshader_p.h> |
42 | #if QT_CONFIG(opengl) |
43 | # include <qopenglshaderprogram.h> |
44 | #endif |
45 | |
46 | QT_BEGIN_NAMESPACE |
47 | |
48 | class FlatColorMaterialShader : public QSGMaterialShader |
49 | { |
50 | public: |
51 | FlatColorMaterialShader(); |
52 | |
53 | void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override; |
54 | char const *const *attributeNames() const override; |
55 | |
56 | static QSGMaterialType type; |
57 | |
58 | private: |
59 | void initialize() override; |
60 | #if QT_CONFIG(opengl) |
61 | int m_matrix_id; |
62 | int m_color_id; |
63 | #endif |
64 | }; |
65 | |
66 | QSGMaterialType FlatColorMaterialShader::type; |
67 | |
68 | FlatColorMaterialShader::FlatColorMaterialShader() |
69 | : QSGMaterialShader(*new QSGMaterialShaderPrivate) |
70 | { |
71 | #if QT_CONFIG(opengl) |
72 | setShaderSourceFile(type: QOpenGLShader::Vertex, QStringLiteral(":/qt-project.org/scenegraph/shaders/flatcolor.vert" )); |
73 | setShaderSourceFile(type: QOpenGLShader::Fragment, QStringLiteral(":/qt-project.org/scenegraph/shaders/flatcolor.frag" )); |
74 | #endif |
75 | } |
76 | |
77 | void FlatColorMaterialShader::updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) |
78 | { |
79 | #if QT_CONFIG(opengl) |
80 | Q_ASSERT(oldEffect == nullptr || newEffect->type() == oldEffect->type()); |
81 | QSGFlatColorMaterial *oldMaterial = static_cast<QSGFlatColorMaterial *>(oldEffect); |
82 | QSGFlatColorMaterial *newMaterial = static_cast<QSGFlatColorMaterial *>(newEffect); |
83 | |
84 | const QColor &c = newMaterial->color(); |
85 | |
86 | if (oldMaterial == nullptr || c != oldMaterial->color() || state.isOpacityDirty()) { |
87 | float opacity = state.opacity() * c.alphaF(); |
88 | QVector4D v(c.redF() * opacity, |
89 | c.greenF() * opacity, |
90 | c.blueF() * opacity, |
91 | opacity); |
92 | program()->setUniformValue(location: m_color_id, value: v); |
93 | } |
94 | |
95 | if (state.isMatrixDirty()) |
96 | program()->setUniformValue(location: m_matrix_id, value: state.combinedMatrix()); |
97 | #else |
98 | Q_UNUSED(state) |
99 | Q_UNUSED(newEffect) |
100 | Q_UNUSED(oldEffect) |
101 | #endif |
102 | } |
103 | |
104 | char const *const *FlatColorMaterialShader::attributeNames() const |
105 | { |
106 | static char const *const attr[] = { "vCoord" , nullptr }; |
107 | return attr; |
108 | } |
109 | |
110 | void FlatColorMaterialShader::initialize() |
111 | { |
112 | #if QT_CONFIG(opengl) |
113 | m_matrix_id = program()->uniformLocation(name: "matrix" ); |
114 | m_color_id = program()->uniformLocation(name: "color" ); |
115 | #endif |
116 | } |
117 | |
118 | |
119 | class FlatColorMaterialRhiShader : public QSGMaterialRhiShader |
120 | { |
121 | public: |
122 | FlatColorMaterialRhiShader(); |
123 | |
124 | bool updateUniformData(RenderState &state, QSGMaterial *newMaterial, QSGMaterial *oldMaterial) override; |
125 | }; |
126 | |
127 | FlatColorMaterialRhiShader::FlatColorMaterialRhiShader() |
128 | { |
129 | setShaderFileName(stage: VertexStage, QStringLiteral(":/qt-project.org/scenegraph/shaders_ng/flatcolor.vert.qsb" )); |
130 | setShaderFileName(stage: FragmentStage, QStringLiteral(":/qt-project.org/scenegraph/shaders_ng/flatcolor.frag.qsb" )); |
131 | } |
132 | |
133 | bool FlatColorMaterialRhiShader::updateUniformData(RenderState &state, |
134 | QSGMaterial *newMaterial, |
135 | QSGMaterial *oldMaterial) |
136 | { |
137 | Q_ASSERT(!oldMaterial || newMaterial->type() == oldMaterial->type()); |
138 | QSGFlatColorMaterial *oldMat = static_cast<QSGFlatColorMaterial *>(oldMaterial); |
139 | QSGFlatColorMaterial *mat = static_cast<QSGFlatColorMaterial *>(newMaterial); |
140 | bool changed = false; |
141 | QByteArray *buf = state.uniformData(); |
142 | |
143 | if (state.isMatrixDirty()) { |
144 | const QMatrix4x4 m = state.combinedMatrix(); |
145 | memcpy(dest: buf->data(), src: m.constData(), n: 64); |
146 | changed = true; |
147 | } |
148 | |
149 | const QColor &c = mat->color(); |
150 | if (!oldMat || c != oldMat->color() || state.isOpacityDirty()) { |
151 | const float opacity = state.opacity() * c.alphaF(); |
152 | QVector4D v(c.redF() * opacity, |
153 | c.greenF() * opacity, |
154 | c.blueF() * opacity, |
155 | opacity); |
156 | Q_ASSERT(sizeof(v) == 16); |
157 | memcpy(dest: buf->data() + 64, src: &v, n: 16); |
158 | changed = true; |
159 | } |
160 | |
161 | return changed; |
162 | } |
163 | |
164 | |
165 | /*! |
166 | \class QSGFlatColorMaterial |
167 | |
168 | \brief The QSGFlatColorMaterial class provides a convenient way of rendering |
169 | solid colored geometry in the scene graph. |
170 | |
171 | \inmodule QtQuick |
172 | \ingroup qtquick-scenegraph-materials |
173 | |
174 | \warning This utility class is only functional when running with the default |
175 | backend of the Qt Quick scenegraph. |
176 | |
177 | The flat color material will fill every pixel in a geometry using |
178 | a solid color. The color can contain transparency. |
179 | |
180 | The geometry to be rendered with a flat color material requires |
181 | vertices in attribute location 0 in the QSGGeometry object to render |
182 | correctly. The QSGGeometry::defaultAttributes_Point2D() returns an attribute |
183 | set compatible with this material. |
184 | |
185 | The flat color material respects both current opacity and current matrix |
186 | when updating its rendering state. |
187 | */ |
188 | |
189 | |
190 | /*! |
191 | Constructs a new flat color material. |
192 | |
193 | The default color is white. |
194 | */ |
195 | |
196 | QSGFlatColorMaterial::QSGFlatColorMaterial() : m_color(QColor(255, 255, 255)) |
197 | { |
198 | setFlag(flags: SupportsRhiShader, on: true); |
199 | } |
200 | |
201 | /*! |
202 | \fn const QColor &QSGFlatColorMaterial::color() const |
203 | |
204 | Returns this flat color material's color. |
205 | |
206 | The default color is white. |
207 | */ |
208 | |
209 | |
210 | |
211 | /*! |
212 | Sets this flat color material's color to \a color. |
213 | */ |
214 | |
215 | void QSGFlatColorMaterial::setColor(const QColor &color) |
216 | { |
217 | m_color = color; |
218 | setFlag(flags: Blending, on: m_color.alpha() != 0xff); |
219 | } |
220 | |
221 | |
222 | |
223 | /*! |
224 | \internal |
225 | */ |
226 | |
227 | QSGMaterialType *QSGFlatColorMaterial::type() const |
228 | { |
229 | return &FlatColorMaterialShader::type; |
230 | } |
231 | |
232 | |
233 | |
234 | /*! |
235 | \internal |
236 | */ |
237 | |
238 | QSGMaterialShader *QSGFlatColorMaterial::createShader() const |
239 | { |
240 | if (flags().testFlag(flag: RhiShaderWanted)) |
241 | return new FlatColorMaterialRhiShader; |
242 | else |
243 | return new FlatColorMaterialShader; |
244 | } |
245 | |
246 | |
247 | /*! |
248 | \internal |
249 | */ |
250 | |
251 | int QSGFlatColorMaterial::compare(const QSGMaterial *other) const |
252 | { |
253 | const QSGFlatColorMaterial *flat = static_cast<const QSGFlatColorMaterial *>(other); |
254 | return m_color.rgba() - flat->color().rgba(); |
255 | |
256 | } |
257 | |
258 | QT_END_NAMESPACE |
259 | |