73 lines
3.1 KiB
C
73 lines
3.1 KiB
C
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#pragma once
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#include <cgv/data/component_format.h>
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#include <cgv/render/texture.h>
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#include <cgv/render/render_buffer.h>
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#include <cgv/render/context.h>
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#include "lib_begin.h"
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namespace cgv {
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namespace render {
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/** this class encapsulate frame buffers that live on the GPU
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and can be used as destination for the render process.
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The GPU must support frame buffer objects for this to work. */
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class CGV_API frame_buffer : public frame_buffer_base
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{
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public:
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/// return the maximum number of color attachments supported by the GPU
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static int get_max_nr_color_attachments(context& ctx);
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/// return the maximum number of simultaneous draw buffers supported by the GPU
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static int get_max_nr_draw_buffers(context& ctx);
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/// a string that contains the last error, which is only set by the init method
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mutable std::string last_error;
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/// constructor just initializes stuff
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frame_buffer();
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/// destructor
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~frame_buffer();
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/// destruct the framebuffer objext
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void destruct(context& ctx);
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/** create framebuffer if extension is supported, otherwise return false.
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The set extent is used to set the viewport in the enable method.
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If no extent is specified it is copied from glViewport. */
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bool create(context& ctx, int _width = -1, int _height = -1);
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/// set a different width
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void set_width(int _width);
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/// set a different height
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void set_height(int _height);
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/// set different size
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void set_size(int _width, int _height);
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/// return the width
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int get_width() const { return width; }
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/// return the height
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int get_height() const { return height; }
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/// attach render buffer to depth buffer if it is a depth buffer, to stencil if it is a stencil buffer or to the i-th color attachment if it is a color buffer
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bool attach(context& ctx, const render_buffer& rb, int i = 0);
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/// attach 2d texture to depth buffer if it is a depth texture, to stencil if it is a stencil texture or to the i-th color attachment if it is a color texture
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bool attach(context& ctx, const texture& tex2d, int level = 0, int i = 0);
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/// attach the j-th slice of a 3d texture or the given cube side of a cubemap to the i-th color attachment
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bool attach(context& ctx, const texture& tex3d, int z_or_cube_side, int level, int i);
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/// check for completeness, if not complete, get the reason in last_error
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bool is_complete(context& ctx) const;
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/** enable the framebuffer either with all color attachments
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if no arguments are given or if arguments are given with
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the indexed color attachments. Return whether this was successful. */
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bool enable(context& ctx, int i0 = -1, int i1 = -1, int i2 = -1, int i3 = -1
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, int i4 = -1, int i5 = -1, int i6 = -1, int i7 = -1
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, int i8 = -1, int i9 = -1, int i10= -1, int i11= -1
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, int i12= -1, int i13= -1, int i14= -1, int i15= -1);
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/** enable the framebuffer either with the color attachments
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specified in the given vector. */
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bool enable(context& ctx, std::vector<int>& indices);
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/// disable the framebuffer object
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bool disable(context& ctx);
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};
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}
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}
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#include <cgv/config/lib_end.h>
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