46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
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/**
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* Offscreen FBO for deterministic fixed-size capture, mirroring
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* EDA_3D_CANVAS::RenderToFrameBuffer (eda_3d_canvas.cpp:736-772):
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* GL_RGBA8 color texture + GL_DEPTH24_STENCIL8 renderbuffer on
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* GL_DEPTH_STENCIL_ATTACHMENT (the stencil is required by
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* OPENGL_RENDER_LIST::DrawCulled hole cutting).
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*
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* Rendering into an FBO makes the output independent of window size and
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* Retina scaling — pixels are exactly aWidth x aHeight.
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*/
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#ifndef FBO_CAPTURE_H
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#define FBO_CAPTURE_H
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#include <kicad_gl/kiglad.h>
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#include <cstdint>
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#include <vector>
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class FBO_CAPTURE
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{
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public:
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/// Create the FBO; returns false if the framebuffer is incomplete.
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/// Falls back to the EXT entry points if the core ARB ones didn't load
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/// (Apple GL 2.1 exposes both; glad loads by symbol name).
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bool Create( int aWidth, int aHeight );
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void Bind();
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/// glFinish + glReadPixels(GL_RGBA); aOut is resized to w*h*4.
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bool ReadPixels( std::vector<uint8_t>& aOut );
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void Destroy();
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int Width() const { return m_width; }
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int Height() const { return m_height; }
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private:
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int m_width = 0;
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int m_height = 0;
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GLuint m_fbo = 0;
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GLuint m_colorTexture = 0;
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GLuint m_depthStencil = 0;
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};
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#endif // FBO_CAPTURE_H
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