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test/source/blender/blenkernel/intern/image_gpu.cc
Jeroen Bakker bdd74e1e93 DrawManager: Image engine support huge images. 
Adding better support for drawing huge images in the image/uv editor. Also solved tearing artifacts.
The approach is that for each image/uv editor a screen space gpu texture is created that only contains
the visible pixels. When zooming or panning the gpu texture is rebuild.

Although the solution isn't memory intensive other parts of blender memory usage scales together with
the image size.

* Due to complexity we didn't implement partial updates when drawing images tiled (wrap repeat).
  This could be added, but is complicated as a change in the source could mean many different
  changes on the GPU texture. The work around for now is to tag all gpu textures to be dirty when
  changes are detected.

Original plan was to have 4 screen space images to support panning without gpu texture creation.
For now we don't see the need to implement it as the solution is already fast. Especially when
GPU memory is shared with CPU ram.

Reviewed By: fclem

Maniphest Tasks: T92525, T92903

Differential Revision: https://developer.blender.org/D13424
2022-01-28 08:37:45 +01:00

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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) 2001-2002 by NaN Holding BV.
* All rights reserved.
*/
/** \file
* \ingroup bke
*/
#include "MEM_guardedalloc.h"
#include "BLI_bitmap.h"
#include "BLI_boxpack_2d.h"
#include "BLI_linklist.h"
#include "BLI_listbase.h"
#include "BLI_threads.h"
#include "DNA_image_types.h"
#include "DNA_userdef_types.h"
#include "IMB_colormanagement.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "BKE_global.h"
#include "BKE_image.h"
#include "BKE_image_partial_update.hh"
#include "BKE_main.h"
#include "GPU_capabilities.h"
#include "GPU_state.h"
#include "GPU_texture.h"
#include "PIL_time.h"
using namespace blender::bke::image::partial_update;
extern "C" {
/* Prototypes. */
static void gpu_free_unused_buffers();
static void image_free_gpu(Image *ima, const bool immediate);
static void image_free_gpu_limited_scale(Image *ima);
static void image_update_gputexture_ex(
Image *ima, ImageTile *tile, ImBuf *ibuf, int x, int y, int w, int h);
bool BKE_image_has_gpu_texture_premultiplied_alpha(Image *image, ImBuf *ibuf)
{
if (image) {
/* Render result and compositor output are always premultiplied */
if (ELEM(image->type, IMA_TYPE_R_RESULT, IMA_TYPE_COMPOSITE)) {
return true;
}
/* Generated images use pre multiplied float buffer, but straight alpha for byte buffers. */
if (image->type == IMA_TYPE_UV_TEST && ibuf) {
return ibuf->rect_float != nullptr;
}
}
if (ibuf) {
if (ibuf->rect_float) {
return image ? (image->alpha_mode != IMA_ALPHA_STRAIGHT) : false;
}
return image ? (image->alpha_mode == IMA_ALPHA_PREMUL) : true;
}
return false;
}
/* -------------------------------------------------------------------- */
/** \name UDIM GPU Texture
* \{ */
static bool is_over_resolution_limit(int w, int h, bool limit_gl_texture_size)
{
return (w > GPU_texture_size_with_limit(w, limit_gl_texture_size) ||
h > GPU_texture_size_with_limit(h, limit_gl_texture_size));
}
static int smaller_power_of_2_limit(int num, bool limit_gl_texture_size)
{
return power_of_2_min_i(GPU_texture_size_with_limit(num, limit_gl_texture_size));
}
static GPUTexture *gpu_texture_create_tile_mapping(
Image *ima, const int multiview_eye, const eImageTextureResolution texture_resolution)
{
const int resolution = (texture_resolution == IMA_TEXTURE_RESOLUTION_LIMITED) ? 1 : 0;
GPUTexture *tilearray = ima->gputexture[TEXTARGET_2D_ARRAY][multiview_eye][resolution];
if (tilearray == nullptr) {
return nullptr;
}
float array_w = GPU_texture_width(tilearray);
float array_h = GPU_texture_height(tilearray);
/* Determine maximum tile number. */
BKE_image_sort_tiles(ima);
ImageTile *last_tile = (ImageTile *)ima->tiles.last;
int max_tile = last_tile->tile_number - 1001;
/* create image */
int width = max_tile + 1;
float *data = (float *)MEM_callocN(width * 8 * sizeof(float), __func__);
for (int i = 0; i < width; i++) {
data[4 * i] = -1.0f;
}
LISTBASE_FOREACH (ImageTile *, tile, &ima->tiles) {
int i = tile->tile_number - 1001;
ImageTile_RuntimeTextureSlot *tile_runtime = &tile->runtime.slots[resolution];
data[4 * i] = tile_runtime->tilearray_layer;
float *tile_info = &data[4 * width + 4 * i];
tile_info[0] = tile_runtime->tilearray_offset[0] / array_w;
tile_info[1] = tile_runtime->tilearray_offset[1] / array_h;
tile_info[2] = tile_runtime->tilearray_size[0] / array_w;
tile_info[3] = tile_runtime->tilearray_size[1] / array_h;
}
GPUTexture *tex = GPU_texture_create_1d_array(ima->id.name + 2, width, 2, 1, GPU_RGBA32F, data);
GPU_texture_mipmap_mode(tex, false, false);
MEM_freeN(data);
return tex;
}
struct PackTile {
FixedSizeBoxPack boxpack;
ImageTile *tile;
float pack_score;
};
static int compare_packtile(const void *a, const void *b)
{
const PackTile *tile_a = (const PackTile *)a;
const PackTile *tile_b = (const PackTile *)b;
return tile_a->pack_score < tile_b->pack_score;
}
static GPUTexture *gpu_texture_create_tile_array(Image *ima,
ImBuf *main_ibuf,
const eImageTextureResolution texture_resolution)
{
const bool limit_gl_texture_size = texture_resolution == IMA_TEXTURE_RESOLUTION_LIMITED;
const int resolution = texture_resolution == IMA_TEXTURE_RESOLUTION_LIMITED ? 1 : 0;
int arraywidth = 0, arrayheight = 0;
ListBase boxes = {nullptr};
LISTBASE_FOREACH (ImageTile *, tile, &ima->tiles) {
ImageUser iuser;
BKE_imageuser_default(&iuser);
iuser.tile = tile->tile_number;
ImBuf *ibuf = BKE_image_acquire_ibuf(ima, &iuser, nullptr);
if (ibuf) {
PackTile *packtile = MEM_cnew<PackTile>(__func__);
packtile->tile = tile;
packtile->boxpack.w = ibuf->x;
packtile->boxpack.h = ibuf->y;
if (is_over_resolution_limit(
packtile->boxpack.w, packtile->boxpack.h, limit_gl_texture_size)) {
packtile->boxpack.w = smaller_power_of_2_limit(packtile->boxpack.w, limit_gl_texture_size);
packtile->boxpack.h = smaller_power_of_2_limit(packtile->boxpack.h, limit_gl_texture_size);
}
arraywidth = max_ii(arraywidth, packtile->boxpack.w);
arrayheight = max_ii(arrayheight, packtile->boxpack.h);
/* We sort the tiles by decreasing size, with an additional penalty term
* for high aspect ratios. This improves packing efficiency. */
float w = packtile->boxpack.w, h = packtile->boxpack.h;
packtile->pack_score = max_ff(w, h) / min_ff(w, h) * w * h;
BKE_image_release_ibuf(ima, ibuf, nullptr);
BLI_addtail(&boxes, packtile);
}
}
BLI_assert(arraywidth > 0 && arrayheight > 0);
BLI_listbase_sort(&boxes, compare_packtile);
int arraylayers = 0;
/* Keep adding layers until all tiles are packed. */
while (boxes.first != nullptr) {
ListBase packed = {nullptr};
BLI_box_pack_2d_fixedarea(&boxes, arraywidth, arrayheight, &packed);
BLI_assert(packed.first != nullptr);
LISTBASE_FOREACH (PackTile *, packtile, &packed) {
ImageTile *tile = packtile->tile;
ImageTile_RuntimeTextureSlot *tile_runtime = &tile->runtime.slots[resolution];
int *tileoffset = tile_runtime->tilearray_offset;
int *tilesize = tile_runtime->tilearray_size;
tileoffset[0] = packtile->boxpack.x;
tileoffset[1] = packtile->boxpack.y;
tilesize[0] = packtile->boxpack.w;
tilesize[1] = packtile->boxpack.h;
tile_runtime->tilearray_layer = arraylayers;
}
BLI_freelistN(&packed);
arraylayers++;
}
const bool use_high_bitdepth = (ima->flag & IMA_HIGH_BITDEPTH);
/* Create Texture without content. */
GPUTexture *tex = IMB_touch_gpu_texture(
ima->id.name + 2, main_ibuf, arraywidth, arrayheight, arraylayers, use_high_bitdepth);
/* Upload each tile one by one. */
LISTBASE_FOREACH (ImageTile *, tile, &ima->tiles) {
ImageTile_RuntimeTextureSlot *tile_runtime = &tile->runtime.slots[resolution];
int tilelayer = tile_runtime->tilearray_layer;
int *tileoffset = tile_runtime->tilearray_offset;
int *tilesize = tile_runtime->tilearray_size;
if (tilesize[0] == 0 || tilesize[1] == 0) {
continue;
}
ImageUser iuser;
BKE_imageuser_default(&iuser);
iuser.tile = tile->tile_number;
ImBuf *ibuf = BKE_image_acquire_ibuf(ima, &iuser, nullptr);
if (ibuf) {
const bool store_premultiplied = BKE_image_has_gpu_texture_premultiplied_alpha(ima, ibuf);
IMB_update_gpu_texture_sub(tex,
ibuf,
UNPACK2(tileoffset),
tilelayer,
UNPACK2(tilesize),
use_high_bitdepth,
store_premultiplied);
}
BKE_image_release_ibuf(ima, ibuf, nullptr);
}
if (GPU_mipmap_enabled()) {
GPU_texture_generate_mipmap(tex);
GPU_texture_mipmap_mode(tex, true, true);
if (ima) {
ima->gpuflag |= IMA_GPU_MIPMAP_COMPLETE;
}
}
else {
GPU_texture_mipmap_mode(tex, false, true);
}
return tex;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Regular gpu texture
* \{ */
static bool image_max_resolution_texture_fits_in_limited_scale(Image *ima,
eGPUTextureTarget textarget,
const int multiview_eye)
{
BLI_assert_msg(U.glreslimit != 0,
"limited scale function called without limited scale being set.");
GPUTexture *max_resolution_texture =
ima->gputexture[textarget][multiview_eye][IMA_TEXTURE_RESOLUTION_FULL];
if (max_resolution_texture && GPU_texture_width(max_resolution_texture) <= U.glreslimit &&
GPU_texture_height(max_resolution_texture) <= U.glreslimit) {
return true;
}
return false;
}
static GPUTexture **get_image_gpu_texture_ptr(Image *ima,
eGPUTextureTarget textarget,
const int multiview_eye,
const eImageTextureResolution texture_resolution)
{
const bool in_range = (textarget >= 0) && (textarget < TEXTARGET_COUNT);
BLI_assert(in_range);
BLI_assert(multiview_eye == 0 || multiview_eye == 1);
const int resolution = (texture_resolution == IMA_TEXTURE_RESOLUTION_LIMITED) ? 1 : 0;
if (in_range) {
return &(ima->gputexture[textarget][multiview_eye][resolution]);
}
return nullptr;
}
static GPUTexture *image_gpu_texture_error_create(eGPUTextureTarget textarget)
{
fprintf(stderr, "GPUTexture: Blender Texture Not Loaded!\n");
switch (textarget) {
case TEXTARGET_2D_ARRAY:
return GPU_texture_create_error(2, true);
case TEXTARGET_TILE_MAPPING:
return GPU_texture_create_error(1, true);
case TEXTARGET_2D:
default:
return GPU_texture_create_error(2, false);
}
}
static void image_update_reusable_textures(Image *ima,
eGPUTextureTarget textarget,
const int multiview_eye)
{
if ((ima->gpuflag & IMA_GPU_HAS_LIMITED_SCALE_TEXTURES) == 0) {
return;
}
if (ELEM(textarget, TEXTARGET_2D, TEXTARGET_2D_ARRAY)) {
if (image_max_resolution_texture_fits_in_limited_scale(ima, textarget, multiview_eye)) {
image_free_gpu_limited_scale(ima);
}
}
}
static void image_gpu_texture_partial_update_changes_available(
Image *image, PartialUpdateChecker<ImageTileData>::CollectResult &changes)
{
while (changes.get_next_change() == ePartialUpdateIterResult::ChangeAvailable) {
const int tile_offset_x = changes.changed_region.region.xmin;
const int tile_offset_y = changes.changed_region.region.ymin;
const int tile_width = min_ii(changes.tile_data.tile_buffer->x,
BLI_rcti_size_x(&changes.changed_region.region));
const int tile_height = min_ii(changes.tile_data.tile_buffer->y,
BLI_rcti_size_y(&changes.changed_region.region));
image_update_gputexture_ex(image,
changes.tile_data.tile,
changes.tile_data.tile_buffer,
tile_offset_x,
tile_offset_y,
tile_width,
tile_height);
}
}
static void image_gpu_texture_try_partial_update(Image *image, ImageUser *iuser)
{
PartialUpdateChecker<ImageTileData> checker(image, iuser, image->runtime.partial_update_user);
PartialUpdateChecker<ImageTileData>::CollectResult changes = checker.collect_changes();
switch (changes.get_result_code()) {
case ePartialUpdateCollectResult::FullUpdateNeeded: {
image_free_gpu(image, true);
break;
}
case ePartialUpdateCollectResult::PartialChangesDetected: {
image_gpu_texture_partial_update_changes_available(image, changes);
break;
}
case ePartialUpdateCollectResult::NoChangesDetected: {
/* GPUTextures are up to date. */
break;
}
}
}
static GPUTexture *image_get_gpu_texture(Image *ima,
ImageUser *iuser,
ImBuf *ibuf,
eGPUTextureTarget textarget)
{
if (ima == nullptr) {
return nullptr;
}
/* Free any unused GPU textures, since we know we are in a thread with OpenGL
* context and might as well ensure we have as much space free as possible. */
gpu_free_unused_buffers();
/* Free GPU textures when requesting a different render pass/layer.
* When `iuser` isn't set (texture painting single image mode) we assume that
* the current `pass` and `layer` should be 0. */
short requested_pass = iuser ? iuser->pass : 0;
short requested_layer = iuser ? iuser->layer : 0;
short requested_view = iuser ? iuser->multi_index : 0;
/* There is room for 2 multiview textures. When a higher number is requested we should always
* target the first view slot. This is fine as multi view images aren't used together. */
if (requested_view < 2) {
requested_view = 0;
}
if (ima->gpu_pass != requested_pass || ima->gpu_layer != requested_layer ||
ima->gpu_view != requested_view) {
ima->gpu_pass = requested_pass;
ima->gpu_layer = requested_layer;
ima->gpu_view = requested_view;
ima->gpuflag |= IMA_GPU_REFRESH;
}
#undef GPU_FLAGS_TO_CHECK
/* TODO(jbakker): We should replace the IMA_GPU_REFRESH flag with a call to
* BKE_image-partial_update_mark_full_update. Although the flag is quicker it leads to double
* administration. */
if ((ima->gpuflag & IMA_GPU_REFRESH) != 0) {
BKE_image_partial_update_mark_full_update(ima);
ima->gpuflag &= ~IMA_GPU_REFRESH;
}
if (ima->runtime.partial_update_user == nullptr) {
ima->runtime.partial_update_user = BKE_image_partial_update_create(ima);
}
image_gpu_texture_try_partial_update(ima, iuser);
/* Tag as in active use for garbage collector. */
BKE_image_tag_time(ima);
/* Test if we already have a texture. */
int current_view = iuser ? iuser->multi_index : 0;
if (current_view >= 2) {
current_view = 0;
}
const bool limit_resolution = U.glreslimit != 0 &&
((iuser && (iuser->flag & IMA_SHOW_MAX_RESOLUTION) == 0) ||
(iuser == nullptr)) &&
((ima->gpuflag & IMA_GPU_REUSE_MAX_RESOLUTION) == 0);
const eImageTextureResolution texture_resolution = limit_resolution ?
IMA_TEXTURE_RESOLUTION_LIMITED :
IMA_TEXTURE_RESOLUTION_FULL;
GPUTexture **tex = get_image_gpu_texture_ptr(ima, textarget, current_view, texture_resolution);
if (*tex) {
return *tex;
}
/* Check if we have a valid image. If not, we return a dummy
* texture with zero bind-code so we don't keep trying. */
ImageTile *tile = BKE_image_get_tile(ima, 0);
if (tile == nullptr) {
*tex = image_gpu_texture_error_create(textarget);
return *tex;
}
/* check if we have a valid image buffer */
ImBuf *ibuf_intern = ibuf;
if (ibuf_intern == nullptr) {
ibuf_intern = BKE_image_acquire_ibuf(ima, iuser, nullptr);
if (ibuf_intern == nullptr) {
return image_gpu_texture_error_create(textarget);
}
}
if (textarget == TEXTARGET_2D_ARRAY) {
*tex = gpu_texture_create_tile_array(ima, ibuf_intern, texture_resolution);
}
else if (textarget == TEXTARGET_TILE_MAPPING) {
*tex = gpu_texture_create_tile_mapping(
ima, iuser ? iuser->multiview_eye : 0, texture_resolution);
}
else {
const bool use_high_bitdepth = (ima->flag & IMA_HIGH_BITDEPTH);
const bool store_premultiplied = BKE_image_has_gpu_texture_premultiplied_alpha(ima,
ibuf_intern);
*tex = IMB_create_gpu_texture(
ima->id.name + 2, ibuf_intern, use_high_bitdepth, store_premultiplied, limit_resolution);
if (*tex) {
GPU_texture_wrap_mode(*tex, true, false);
if (GPU_mipmap_enabled()) {
GPU_texture_generate_mipmap(*tex);
if (ima) {
ima->gpuflag |= IMA_GPU_MIPMAP_COMPLETE;
}
GPU_texture_mipmap_mode(*tex, true, true);
}
else {
GPU_texture_mipmap_mode(*tex, false, true);
}
}
}
switch (texture_resolution) {
case IMA_TEXTURE_RESOLUTION_LIMITED:
ima->gpuflag |= IMA_GPU_HAS_LIMITED_SCALE_TEXTURES;
break;
case IMA_TEXTURE_RESOLUTION_FULL:
image_update_reusable_textures(ima, textarget, current_view);
break;
case IMA_TEXTURE_RESOLUTION_LEN:
BLI_assert_unreachable();
break;
}
if (*tex) {
GPU_texture_orig_size_set(*tex, ibuf_intern->x, ibuf_intern->y);
}
if (ibuf != ibuf_intern) {
BKE_image_release_ibuf(ima, ibuf_intern, nullptr);
}
return *tex;
}
GPUTexture *BKE_image_get_gpu_texture(Image *image, ImageUser *iuser, ImBuf *ibuf)
{
return image_get_gpu_texture(image, iuser, ibuf, TEXTARGET_2D);
}
GPUTexture *BKE_image_get_gpu_tiles(Image *image, ImageUser *iuser, ImBuf *ibuf)
{
return image_get_gpu_texture(image, iuser, ibuf, TEXTARGET_2D_ARRAY);
}
GPUTexture *BKE_image_get_gpu_tilemap(Image *image, ImageUser *iuser, ImBuf *ibuf)
{
return image_get_gpu_texture(image, iuser, ibuf, TEXTARGET_TILE_MAPPING);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Delayed GPU texture free
*
* Image datablocks can be deleted by any thread, but there may not be any active OpenGL context.
* In that case we push them into a queue and free the buffers later.
* \{ */
static LinkNode *gpu_texture_free_queue = nullptr;
static ThreadMutex gpu_texture_queue_mutex = BLI_MUTEX_INITIALIZER;
static void gpu_free_unused_buffers()
{
if (gpu_texture_free_queue == nullptr) {
return;
}
BLI_mutex_lock(&gpu_texture_queue_mutex);
while (gpu_texture_free_queue != nullptr) {
GPUTexture *tex = static_cast<GPUTexture *>(BLI_linklist_pop(&gpu_texture_free_queue));
GPU_texture_free(tex);
}
BLI_mutex_unlock(&gpu_texture_queue_mutex);
}
void BKE_image_free_unused_gpu_textures()
{
if (BLI_thread_is_main()) {
gpu_free_unused_buffers();
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Deletion
* \{ */
static void image_free_gpu(Image *ima, const bool immediate)
{
for (int eye = 0; eye < 2; eye++) {
for (int i = 0; i < TEXTARGET_COUNT; i++) {
for (int resolution = 0; resolution < IMA_TEXTURE_RESOLUTION_LEN; resolution++) {
if (ima->gputexture[i][eye][resolution] != nullptr) {
if (immediate) {
GPU_texture_free(ima->gputexture[i][eye][resolution]);
}
else {
BLI_mutex_lock(&gpu_texture_queue_mutex);
BLI_linklist_prepend(&gpu_texture_free_queue, ima->gputexture[i][eye][resolution]);
BLI_mutex_unlock(&gpu_texture_queue_mutex);
}
ima->gputexture[i][eye][resolution] = nullptr;
}
}
}
}
ima->gpuflag &= ~(IMA_GPU_MIPMAP_COMPLETE | IMA_GPU_HAS_LIMITED_SCALE_TEXTURES);
}
static void image_free_gpu_limited_scale(Image *ima)
{
const eImageTextureResolution resolution = IMA_TEXTURE_RESOLUTION_LIMITED;
for (int eye = 0; eye < 2; eye++) {
for (int i = 0; i < TEXTARGET_COUNT; i++) {
if (ima->gputexture[i][eye][resolution] != nullptr) {
GPU_texture_free(ima->gputexture[i][eye][resolution]);
ima->gputexture[i][eye][resolution] = nullptr;
}
}
}
ima->gpuflag &= ~(IMA_GPU_MIPMAP_COMPLETE | IMA_GPU_HAS_LIMITED_SCALE_TEXTURES);
}
void BKE_image_free_gputextures(Image *ima)
{
image_free_gpu(ima, BLI_thread_is_main());
}
void BKE_image_free_all_gputextures(Main *bmain)
{
if (bmain) {
LISTBASE_FOREACH (Image *, ima, &bmain->images) {
BKE_image_free_gputextures(ima);
}
}
}
void BKE_image_free_anim_gputextures(Main *bmain)
{
if (bmain) {
LISTBASE_FOREACH (Image *, ima, &bmain->images) {
if (BKE_image_is_animated(ima)) {
BKE_image_free_gputextures(ima);
}
}
}
}
void BKE_image_free_old_gputextures(Main *bmain)
{
static int lasttime = 0;
int ctime = (int)PIL_check_seconds_timer();
/*
* Run garbage collector once for every collecting period of time
* if textimeout is 0, that's the option to NOT run the collector
*/
if (U.textimeout == 0 || ctime % U.texcollectrate || ctime == lasttime) {
return;
}
/* of course not! */
if (G.is_rendering) {
return;
}
lasttime = ctime;
LISTBASE_FOREACH (Image *, ima, &bmain->images) {
if ((ima->flag & IMA_NOCOLLECT) == 0 && ctime - ima->lastused > U.textimeout) {
/* If it's in GL memory, deallocate and set time tag to current time
* This gives textures a "second chance" to be used before dying. */
if (BKE_image_has_opengl_texture(ima)) {
BKE_image_free_gputextures(ima);
ima->lastused = ctime;
}
/* Otherwise, just kill the buffers */
else {
BKE_image_free_buffers(ima);
}
}
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Paint Update
* \{ */
static ImBuf *update_do_scale(uchar *rect,
float *rect_float,
int *x,
int *y,
int *w,
int *h,
int limit_w,
int limit_h,
int full_w,
int full_h)
{
/* Partial update with scaling. */
float xratio = limit_w / (float)full_w;
float yratio = limit_h / (float)full_h;
int part_w = *w, part_h = *h;
/* Find sub coordinates in scaled image. Take ceiling because we will be
* losing 1 pixel due to rounding errors in x,y. */
*x *= xratio;
*y *= yratio;
*w = (int)ceil(xratio * (*w));
*h = (int)ceil(yratio * (*h));
/* ...but take back if we are over the limit! */
if (*x + *w > limit_w) {
(*w)--;
}
if (*y + *h > limit_h) {
(*h)--;
}
/* Scale pixels. */
ImBuf *ibuf = IMB_allocFromBuffer((uint *)rect, rect_float, part_w, part_h, 4);
IMB_scaleImBuf(ibuf, *w, *h);
return ibuf;
}
static void gpu_texture_update_scaled(GPUTexture *tex,
uchar *rect,
float *rect_float,
int full_w,
int full_h,
int x,
int y,
int layer,
const int *tile_offset,
const int *tile_size,
int w,
int h)
{
ImBuf *ibuf;
if (layer > -1) {
ibuf = update_do_scale(
rect, rect_float, &x, &y, &w, &h, tile_size[0], tile_size[1], full_w, full_h);
/* Shift to account for tile packing. */
x += tile_offset[0];
y += tile_offset[1];
}
else {
/* Partial update with scaling. */
int limit_w = GPU_texture_width(tex);
int limit_h = GPU_texture_height(tex);
ibuf = update_do_scale(rect, rect_float, &x, &y, &w, &h, limit_w, limit_h, full_w, full_h);
}
void *data = (ibuf->rect_float) ? (void *)(ibuf->rect_float) : (void *)(ibuf->rect);
eGPUDataFormat data_format = (ibuf->rect_float) ? GPU_DATA_FLOAT : GPU_DATA_UBYTE;
GPU_texture_update_sub(tex, data_format, data, x, y, layer, w, h, 1);
IMB_freeImBuf(ibuf);
}
static void gpu_texture_update_unscaled(GPUTexture *tex,
uchar *rect,
float *rect_float,
int x,
int y,
int layer,
const int tile_offset[2],
int w,
int h,
int tex_stride,
int tex_offset)
{
if (layer > -1) {
/* Shift to account for tile packing. */
x += tile_offset[0];
y += tile_offset[1];
}
void *data = (rect_float) ? (void *)(rect_float + tex_offset) : (void *)(rect + tex_offset);
eGPUDataFormat data_format = (rect_float) ? GPU_DATA_FLOAT : GPU_DATA_UBYTE;
/* Partial update without scaling. Stride and offset are used to copy only a
* subset of a possible larger buffer than what we are updating. */
GPU_unpack_row_length_set(tex_stride);
GPU_texture_update_sub(tex, data_format, data, x, y, layer, w, h, 1);
/* Restore default. */
GPU_unpack_row_length_set(0);
}
static void gpu_texture_update_from_ibuf(GPUTexture *tex,
Image *ima,
ImBuf *ibuf,
ImageTile *tile,
int x,
int y,
int w,
int h,
eImageTextureResolution texture_resolution)
{
const int resolution = texture_resolution == IMA_TEXTURE_RESOLUTION_LIMITED ? 1 : 0;
bool scaled;
if (tile != nullptr) {
ImageTile_RuntimeTextureSlot *tile_runtime = &tile->runtime.slots[resolution];
int *tilesize = tile_runtime->tilearray_size;
scaled = (ibuf->x != tilesize[0]) || (ibuf->y != tilesize[1]);
}
else {
scaled = (GPU_texture_width(tex) != ibuf->x) || (GPU_texture_height(tex) != ibuf->y);
}
if (scaled) {
/* Extra padding to account for bleed from neighboring pixels. */
const int padding = 4;
const int xmax = min_ii(x + w + padding, ibuf->x);
const int ymax = min_ii(y + h + padding, ibuf->y);
x = max_ii(x - padding, 0);
y = max_ii(y - padding, 0);
w = xmax - x;
h = ymax - y;
}
/* Get texture data pointers. */
float *rect_float = ibuf->rect_float;
uchar *rect = (uchar *)ibuf->rect;
int tex_stride = ibuf->x;
int tex_offset = ibuf->channels * (y * ibuf->x + x);
const bool store_premultiplied = BKE_image_has_gpu_texture_premultiplied_alpha(ima, ibuf);
if (rect_float == nullptr) {
/* Byte pixels. */
if (!IMB_colormanagement_space_is_data(ibuf->rect_colorspace)) {
const bool compress_as_srgb = !IMB_colormanagement_space_is_scene_linear(
ibuf->rect_colorspace);
rect = (uchar *)MEM_mallocN(sizeof(uchar[4]) * w * h, __func__);
if (rect == nullptr) {
return;
}
tex_stride = w;
tex_offset = 0;
/* Convert to scene linear with sRGB compression, and premultiplied for
* correct texture interpolation. */
IMB_colormanagement_imbuf_to_byte_texture(
rect, x, y, w, h, ibuf, compress_as_srgb, store_premultiplied);
}
}
else {
/* Float pixels. */
if (ibuf->channels != 4 || scaled || !store_premultiplied) {
rect_float = (float *)MEM_mallocN(sizeof(float[4]) * w * h, __func__);
if (rect_float == nullptr) {
return;
}
tex_stride = w;
tex_offset = 0;
IMB_colormanagement_imbuf_to_float_texture(
rect_float, x, y, w, h, ibuf, store_premultiplied);
}
}
if (scaled) {
/* Slower update where we first have to scale the input pixels. */
if (tile != nullptr) {
ImageTile_RuntimeTextureSlot *tile_runtime = &tile->runtime.slots[resolution];
int *tileoffset = tile_runtime->tilearray_offset;
int *tilesize = tile_runtime->tilearray_size;
int tilelayer = tile_runtime->tilearray_layer;
gpu_texture_update_scaled(
tex, rect, rect_float, ibuf->x, ibuf->y, x, y, tilelayer, tileoffset, tilesize, w, h);
}
else {
gpu_texture_update_scaled(
tex, rect, rect_float, ibuf->x, ibuf->y, x, y, -1, nullptr, nullptr, w, h);
}
}
else {
/* Fast update at same resolution. */
if (tile != nullptr) {
ImageTile_RuntimeTextureSlot *tile_runtime = &tile->runtime.slots[resolution];
int *tileoffset = tile_runtime->tilearray_offset;
int tilelayer = tile_runtime->tilearray_layer;
gpu_texture_update_unscaled(
tex, rect, rect_float, x, y, tilelayer, tileoffset, w, h, tex_stride, tex_offset);
}
else {
gpu_texture_update_unscaled(
tex, rect, rect_float, x, y, -1, nullptr, w, h, tex_stride, tex_offset);
}
}
/* Free buffers if needed. */
if (rect && rect != (uchar *)ibuf->rect) {
MEM_freeN(rect);
}
if (rect_float && rect_float != ibuf->rect_float) {
MEM_freeN(rect_float);
}
if (GPU_mipmap_enabled()) {
GPU_texture_generate_mipmap(tex);
}
else {
ima->gpuflag &= ~IMA_GPU_MIPMAP_COMPLETE;
}
GPU_texture_unbind(tex);
}
static void image_update_gputexture_ex(
Image *ima, ImageTile *tile, ImBuf *ibuf, int x, int y, int w, int h)
{
const int eye = 0;
for (int resolution = 0; resolution < IMA_TEXTURE_RESOLUTION_LEN; resolution++) {
GPUTexture *tex = ima->gputexture[TEXTARGET_2D][eye][resolution];
eImageTextureResolution texture_resolution = static_cast<eImageTextureResolution>(resolution);
/* Check if we need to update the main gputexture. */
if (tex != nullptr && tile == ima->tiles.first) {
gpu_texture_update_from_ibuf(tex, ima, ibuf, nullptr, x, y, w, h, texture_resolution);
}
/* Check if we need to update the array gputexture. */
tex = ima->gputexture[TEXTARGET_2D_ARRAY][eye][resolution];
if (tex != nullptr) {
gpu_texture_update_from_ibuf(tex, ima, ibuf, tile, x, y, w, h, texture_resolution);
}
}
}
void BKE_image_update_gputexture(Image *ima, ImageUser *iuser, int x, int y, int w, int h)
{
ImageTile *image_tile = BKE_image_get_tile_from_iuser(ima, iuser);
ImBuf *ibuf = BKE_image_acquire_ibuf(ima, iuser, nullptr);
BKE_image_update_gputexture_delayed(ima, image_tile, ibuf, x, y, w, h);
BKE_image_release_ibuf(ima, ibuf, nullptr);
}
void BKE_image_update_gputexture_delayed(struct Image *ima,
struct ImageTile *image_tile,
struct ImBuf *ibuf,
int x,
int y,
int w,
int h)
{
/* Check for full refresh. */
if (ibuf != nullptr && ima->source != IMA_SRC_TILED && x == 0 && y == 0 && w == ibuf->x &&
h == ibuf->y) {
BKE_image_partial_update_mark_full_update(ima);
}
else {
rcti dirty_region;
BLI_rcti_init(&dirty_region, x, x + w, y, y + h);
BKE_image_partial_update_mark_region(ima, image_tile, ibuf, &dirty_region);
}
}
void BKE_image_paint_set_mipmap(Main *bmain, bool mipmap)
{
LISTBASE_FOREACH (Image *, ima, &bmain->images) {
if (BKE_image_has_opengl_texture(ima)) {
if (ima->gpuflag & IMA_GPU_MIPMAP_COMPLETE) {
for (int a = 0; a < TEXTARGET_COUNT; a++) {
if (ELEM(a, TEXTARGET_2D, TEXTARGET_2D_ARRAY)) {
for (int eye = 0; eye < 2; eye++) {
for (int resolution = 0; resolution < IMA_TEXTURE_RESOLUTION_LEN; resolution++) {
GPUTexture *tex = ima->gputexture[a][eye][resolution];
if (tex != nullptr) {
GPU_texture_mipmap_mode(tex, mipmap, true);
}
}
}
}
}
}
else {
BKE_image_free_gputextures(ima);
}
}
else {
ima->gpuflag &= ~IMA_GPU_MIPMAP_COMPLETE;
}
}
}
/** \} */
}
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