comparison: src/glrenderer.cpp
src/glrenderer.cpp
- changeset 1171
- 430ffa371d2a
- parent 1170
- 2045a395213a
- child 1172
- 3defab8cfd93
equal
deleted
inserted
replaced
| 1170:2045a395213a | 1171:430ffa371d2a |
|---|---|
| 803 { | 803 { |
| 804 if (m_objectAtCursor == object) | 804 if (m_objectAtCursor == object) |
| 805 m_objectAtCursor = nullptr; | 805 m_objectAtCursor = nullptr; |
| 806 } | 806 } |
| 807 | 807 |
| 808 // ============================================================================= | 808 /* |
| 809 // | 809 * Returns an image containing the current render of the scene. |
| 810 QByteArray GLRenderer::capturePixels() | 810 */ |
| 811 { | 811 QImage GLRenderer::screenCapture() |
| 812 QByteArray result; | 812 { |
| 813 result.resize (4 * width() * height()); | 813 // Read the current render to a buffer of pixels. We use RGBA format even though the image should be fully opaque at all times. |
| 814 m_takingScreenCapture = true; | 814 // This is because apparently GL_RGBA/GL_UNSIGNED_BYTE is the only setting pair that is guaranteed to actually work! |
| 815 update(); // Smile! | 815 // ref: https://www.khronos.org/registry/OpenGL-Refpages/es2.0/xhtml/glReadPixels.xml |
| 816 m_takingScreenCapture = false; | 816 QByteArray pixelData; |
| 817 glReadPixels(0, 0, width(), height(), GL_RGBA, GL_UNSIGNED_BYTE, result.data()); | 817 pixelData.resize(4 * width() * height()); |
| 818 return result; | 818 glReadPixels(0, 0, width(), height(), GL_RGBA, GL_UNSIGNED_BYTE, pixelData.data()); |
| 819 | |
| 820 // Prepare the image and return it. It appears that GL and Qt formats have red and blue swapped and the Y axis flipped. | |
| 821 QImage image {reinterpret_cast<const uchar*>(pixelData.constData()), width(), height(), QImage::Format_ARGB32}; | |
| 822 return image.rgbSwapped().mirrored(); | |
| 819 } | 823 } |
| 820 | 824 |
| 821 /* | 825 /* |
| 822 * Show a tooltip if the cursor is currently hovering over a camera icon. | 826 * Show a tooltip if the cursor is currently hovering over a camera icon. |
| 823 */ | 827 */ |
