LookingGlass/client/renderers/EGL/texture_framebuffer.c
2023-11-10 06:28:05 +11:00

173 lines
4.5 KiB
C

/**
* Looking Glass
* Copyright © 2017-2023 The Looking Glass Authors
* https://looking-glass.io
*
* 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., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "texture.h"
#include "texture_buffer.h"
#include "common/debug.h"
#include "common/KVMFR.h"
#include "common/rects.h"
struct TexDamage
{
int count;
FrameDamageRect rects[KVMFR_MAX_DAMAGE_RECTS];
};
typedef struct TexFB
{
TextureBuffer base;
struct TexDamage damage[EGL_TEX_BUFFER_MAX];
}
TexFB;
static bool egl_texFBInit(EGL_Texture ** texture, EGL_TexType type,
EGLDisplay * display)
{
TexFB * this = calloc(1, sizeof(*this));
*texture = &this->base.base;
EGL_Texture * parent = &this->base.base;
if (!egl_texBufferStreamInit(&parent, type, display))
{
free(this);
*texture = NULL;
return false;
}
for (int i = 0; i < EGL_TEX_BUFFER_MAX; ++i)
this->damage[i].count = -1;
return true;
}
void egl_texFBFree(EGL_Texture * texture)
{
TextureBuffer * parent = UPCAST(TextureBuffer, texture);
TexFB * this = UPCAST(TexFB , parent );
egl_texBufferFree(texture);
free(this);
}
bool egl_texFBSetup(EGL_Texture * texture, const EGL_TexSetup * setup)
{
TextureBuffer * parent = UPCAST(TextureBuffer, texture);
TexFB * this = UPCAST(TexFB , parent );
for (int i = 0; i < EGL_TEX_BUFFER_MAX; ++i)
this->damage[i].count = -1;
return egl_texBufferStreamSetup(texture, setup);
}
static int scaleForBGR(int x)
{
return x * 3 / 4;
}
static bool egl_texFBUpdate(EGL_Texture * texture, const EGL_TexUpdate * update)
{
TextureBuffer * parent = UPCAST(TextureBuffer, texture);
TexFB * this = UPCAST(TexFB , parent );
DEBUG_ASSERT(update->type == EGL_TEXTYPE_FRAMEBUFFER);
LG_LOCK(parent->copyLock);
struct TexDamage * damage = this->damage + parent->bufIndex;
bool damageAll = !update->rects || update->rectCount == 0 || damage->count < 0 ||
damage->count + update->rectCount > KVMFR_MAX_DAMAGE_RECTS;
if (damageAll)
{
framebuffer_read(
update->frame,
parent->buf[parent->bufIndex].map,
texture->format.pitch,
texture->format.height,
texture->format.width,
texture->format.bpp,
texture->format.pitch
);
}
else
{
memcpy(damage->rects + damage->count, update->rects,
update->rectCount * sizeof(FrameDamageRect));
damage->count += update->rectCount;
FrameDamageRect scaledDamageRects[damage->count];
for (int i = 0; i < damage->count; i++)
{
FrameDamageRect rect = damage->rects[i];
int originalX = rect.x;
int scaledX = scaleForBGR(originalX);
rect.x = scaledX;
rect.width = scaleForBGR(originalX + rect.width) - scaledX;
scaledDamageRects[i] = rect;
}
rectsFramebufferToBuffer(
scaledDamageRects,
damage->count,
texture->format.bpp,
parent->buf[parent->bufIndex].map,
texture->format.pitch,
texture->format.height,
update->frame,
texture->format.pitch
);
}
parent->buf[parent->bufIndex].updated = true;
for (int i = 0; i < EGL_TEX_BUFFER_MAX; ++i)
{
struct TexDamage * damage = this->damage + i;
if (i == parent->bufIndex)
damage->count = 0;
else if (update->rects && update->rectCount > 0 && damage->count >= 0 &&
damage->count + update->rectCount <= KVMFR_MAX_DAMAGE_RECTS)
{
memcpy(damage->rects + damage->count, update->rects,
update->rectCount * sizeof(FrameDamageRect));
damage->count += update->rectCount;
}
else
damage->count = -1;
}
LG_UNLOCK(parent->copyLock);
return true;
}
EGL_TextureOps EGL_TextureFrameBuffer =
{
.init = egl_texFBInit,
.free = egl_texFBFree,
.setup = egl_texFBSetup,
.update = egl_texFBUpdate,
.process = egl_texBufferStreamProcess,
.get = egl_texBufferStreamGet,
.bind = egl_texBufferBind
};