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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2020 Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup gpu
*/
#pragma once
#include "MEM_guardedalloc.h"
#include "GPU_framebuffer.h"
#include "glew-mx.h" /* For GLuint. To remove. */
struct GPUTexture;
typedef enum {
GPU_FB_DEPTH_ATTACHMENT = 0,
GPU_FB_DEPTH_STENCIL_ATTACHMENT,
GPU_FB_COLOR_ATTACHMENT0,
GPU_FB_COLOR_ATTACHMENT1,
GPU_FB_COLOR_ATTACHMENT2,
GPU_FB_COLOR_ATTACHMENT3,
GPU_FB_COLOR_ATTACHMENT4,
GPU_FB_COLOR_ATTACHMENT5,
/* Number of maximum output slots.
* We support 6 outputs for now (usually we wouldn't need more to preserve fill rate). */
/* Keep in mind that GL max is GL_MAX_DRAW_BUFFERS and is at least 8, corresponding to
* the maximum number of COLOR attachments specified by glDrawBuffers. */
GPU_FB_MAX_ATTACHEMENT,
} GPUAttachmentType;
namespace blender {
namespace gpu {
#define FOREACH_ATTACHMENT_RANGE(att, _start, _end) \
for (GPUAttachmentType att = static_cast<GPUAttachmentType>(_start); att < _end; \
att = static_cast<GPUAttachmentType>(att + 1))
#define GPU_FB_MAX_COLOR_ATTACHMENT (GPU_FB_MAX_ATTACHEMENT - GPU_FB_COLOR_ATTACHMENT0)
#define GPU_FB_DIRTY_DRAWBUFFER (1 << 15)
#define GPU_FB_ATTACHEMENT_IS_DIRTY(flag, type) ((flag & (1 << type)) != 0)
#define GPU_FB_ATTACHEMENT_SET_DIRTY(flag, type) (flag |= (1 << type))
class FrameBuffer {
public:
GPUContext *ctx;
GLuint object;
GPUAttachment attachments[GPU_FB_MAX_ATTACHEMENT];
uint16_t dirty_flag;
int width, height;
bool multisample;
/* TODO Check that we always use the right context when binding
* (FBOs are not shared across ogl contexts). */
// void *ctx;
public:
GPUTexture *depth_tex(void) const
{
if (attachments[GPU_FB_DEPTH_ATTACHMENT].tex) {
return attachments[GPU_FB_DEPTH_ATTACHMENT].tex;
}
return attachments[GPU_FB_DEPTH_STENCIL_ATTACHMENT].tex;
};
GPUTexture *color_tex(int slot) const
{
return attachments[GPU_FB_COLOR_ATTACHMENT0 + slot].tex;
};
MEM_CXX_CLASS_ALLOC_FUNCS("FrameBuffer")
};
} // namespace gpu
} // namespace blender
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