Clément Foucault
8527d84d35
This way it is way clearer what each viewport state is. There is no more save and reset. The scissor test is also saved per framebuffer. The only rule to remember is that the viewport state (size and origin) is reset for both the viewport and scissor when a texture is attached or detached from an attachment slot.
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright 2020, Blender Foundation.
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*/
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/** \file
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* \ingroup gpu
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*/
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#include "MEM_guardedalloc.h"
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#include "BLI_utildefines.h"
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#include "gpu_state_private.hh"
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#include "glew-mx.h"
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namespace blender {
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namespace gpu {
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class GLFrameBuffer;
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/**
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* State manager keeping track of the draw state and applying it before drawing.
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* Opengl Implementation.
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**/
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class GLStateManager : public GPUStateManager {
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public:
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/** Anothter reference to tje active framebuffer. */
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GLFrameBuffer *active_fb;
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private:
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/** Current state of the GL implementation. Avoids resetting the whole state for every change. */
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GPUState current_;
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GPUStateMutable current_mutable_;
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/** Limits. */
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float line_width_range_[2];
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public:
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GLStateManager();
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void apply_state(void) override;
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private:
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static void set_write_mask(const eGPUWriteMask value);
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static void set_depth_test(const eGPUDepthTest value);
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static void set_stencil_test(const eGPUStencilTest test, const eGPUStencilOp operation);
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static void set_stencil_mask(const eGPUStencilTest test, const GPUStateMutable state);
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static void set_clip_distances(const int new_dist_len, const int old_dist_len);
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static void set_logic_op(const bool enable);
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static void set_facing(const bool invert);
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static void set_backface_culling(const eGPUFaceCullTest test);
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static void set_provoking_vert(const eGPUProvokingVertex vert);
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static void set_shadow_bias(const bool enable);
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static void set_blend(const eGPUBlend value);
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void set_state(const GPUState &state);
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void set_mutable_state(const GPUStateMutable &state);
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MEM_CXX_CLASS_ALLOC_FUNCS("GLStateManager")
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};
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} // namespace gpu
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} // namespace blender
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