Clément Foucault
db21c12abe
This is in preparation of using it to clear single texture. Also includes minor cleanups about not using tex target in assert and adding enum operators.
152 lines
4.3 KiB
C++
152 lines
4.3 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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* The Original Code is Copyright (C) 2020 Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup gpu
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*
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* Encapsulation of Framebuffer states (attached textures, viewport, scissors).
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*/
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#pragma once
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#include "MEM_guardedalloc.h"
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#include "glew-mx.h"
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#include "gpu_framebuffer_private.hh"
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namespace blender::gpu {
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class GLStateManager;
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/**
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* Implementation of FrameBuffer object using OpenGL.
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**/
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class GLFrameBuffer : public FrameBuffer {
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private:
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/** OpenGL handle. */
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GLuint fbo_id_ = 0;
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/** Context the handle is from. Framebuffers are not shared accros contexts. */
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GLContext *context_ = NULL;
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/** State Manager of the same contexts. */
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GLStateManager *state_manager_ = NULL;
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/** Copy of the GL state. Contains ONLY color attachments enums for slot binding. */
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GLenum gl_attachments_[GPU_FB_MAX_COLOR_ATTACHMENT];
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/** Internal framebuffers are immutable. */
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bool immutable_;
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/** True is the framebuffer has it's first color target using the GPU_SRGB8_A8 format. */
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bool srgb_;
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public:
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/**
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* Create a conventional framebuffer to attach texture to.
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**/
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GLFrameBuffer(const char *name);
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/**
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* Special Framebuffer encapsulating internal window framebuffer.
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* (i.e.: GL_FRONT_LEFT, GL_BACK_RIGHT, ...)
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* @param ctx context the handle is from.
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* @param target the internal GL name (i.e: GL_BACK_LEFT).
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* @param fbo the (optional) already created object for some implementation. Default is 0.
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* @param w buffer width.
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* @param h buffer height.
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**/
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GLFrameBuffer(const char *name, GLContext *ctx, GLenum target, GLuint fbo, int w, int h);
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~GLFrameBuffer();
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void bind(bool enabled_srgb) override;
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bool check(char err_out[256]) override;
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void clear(eGPUFrameBufferBits buffers,
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const float clear_col[4],
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float clear_depth,
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uint clear_stencil) override;
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void clear_multi(const float (*clear_cols)[4]) override;
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void clear_attachment(GPUAttachmentType type,
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eGPUDataFormat data_format,
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const void *clear_value) override;
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void read(eGPUFrameBufferBits planes,
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eGPUDataFormat format,
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const int area[4],
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int channel_len,
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int slot,
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void *r_data) override;
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void blit_to(eGPUFrameBufferBits planes,
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int src_slot,
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FrameBuffer *dst,
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int dst_slot,
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int dst_offset_x,
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int dst_offset_y) override;
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void apply_state(void);
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private:
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void init(void);
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void update_attachments(void);
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void update_drawbuffers(void);
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MEM_CXX_CLASS_ALLOC_FUNCS("GLFrameBuffer");
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};
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/* -------------------------------------------------------------------- */
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/** \name Enums Conversion
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* \{ */
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static inline GLenum to_gl(const GPUAttachmentType type)
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{
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#define ATTACHMENT(X) \
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case GPU_FB_##X: { \
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return GL_##X; \
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} \
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((void)0)
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switch (type) {
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ATTACHMENT(DEPTH_ATTACHMENT);
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ATTACHMENT(DEPTH_STENCIL_ATTACHMENT);
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ATTACHMENT(COLOR_ATTACHMENT0);
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ATTACHMENT(COLOR_ATTACHMENT1);
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ATTACHMENT(COLOR_ATTACHMENT2);
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ATTACHMENT(COLOR_ATTACHMENT3);
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ATTACHMENT(COLOR_ATTACHMENT4);
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ATTACHMENT(COLOR_ATTACHMENT5);
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default:
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BLI_assert(0);
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return GL_COLOR_ATTACHMENT0;
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}
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#undef ATTACHMENT
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}
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static inline GLbitfield to_gl(const eGPUFrameBufferBits bits)
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{
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GLbitfield mask = 0;
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mask |= (bits & GPU_DEPTH_BIT) ? GL_DEPTH_BUFFER_BIT : 0;
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mask |= (bits & GPU_STENCIL_BIT) ? GL_STENCIL_BUFFER_BIT : 0;
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mask |= (bits & GPU_COLOR_BIT) ? GL_COLOR_BUFFER_BIT : 0;
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return mask;
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}
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/** \} */
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} // namespace blender::gpu
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