c434782e3a
Use a shorter/simpler license convention, stops the header taking so much space. Follow the SPDX license specification: https://spdx.org/licenses - C/C++/objc/objc++ - Python - Shell Scripts - CMake, GNUmakefile While most of the source tree has been included - `./extern/` was left out. - `./intern/cycles` & `./intern/atomic` are also excluded because they use different header conventions. doc/license/SPDX-license-identifiers.txt has been added to list SPDX all used identifiers. See P2788 for the script that automated these edits. Reviewed By: brecht, mont29, sergey Ref D14069
92 lines
2.0 KiB
C++
92 lines
2.0 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2021 Blender Foundation. */
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/** \file
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* \ingroup draw_engine
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*/
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#pragma once
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#include "image_texture_info.hh"
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/** \brief Create GPUBatch for a IMAGE_ScreenSpaceTextureInfo. */
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class BatchUpdater {
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TextureInfo &info;
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GPUVertFormat format = {0};
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int pos_id;
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int uv_id;
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public:
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BatchUpdater(TextureInfo &info) : info(info)
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{
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}
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void update_batch()
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{
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ensure_clear_batch();
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ensure_format();
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init_batch();
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}
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void discard_batch()
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{
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GPU_BATCH_DISCARD_SAFE(info.batch);
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}
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private:
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void ensure_clear_batch()
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{
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GPU_BATCH_CLEAR_SAFE(info.batch);
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if (info.batch == nullptr) {
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info.batch = GPU_batch_calloc();
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}
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}
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void init_batch()
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{
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GPUVertBuf *vbo = create_vbo();
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GPU_batch_init_ex(info.batch, GPU_PRIM_TRI_FAN, vbo, nullptr, GPU_BATCH_OWNS_VBO);
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}
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GPUVertBuf *create_vbo()
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{
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GPUVertBuf *vbo = GPU_vertbuf_create_with_format(&format);
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GPU_vertbuf_data_alloc(vbo, 4);
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float pos[4][2];
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fill_tri_fan_from_rctf(pos, info.clipping_bounds);
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float uv[4][2];
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fill_tri_fan_from_rctf(uv, info.clipping_uv_bounds);
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for (int i = 0; i < 4; i++) {
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GPU_vertbuf_attr_set(vbo, pos_id, i, pos[i]);
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GPU_vertbuf_attr_set(vbo, uv_id, i, uv[i]);
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}
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return vbo;
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}
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static void fill_tri_fan_from_rctf(float result[4][2], rctf &rect)
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{
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result[0][0] = rect.xmin;
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result[0][1] = rect.ymin;
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result[1][0] = rect.xmax;
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result[1][1] = rect.ymin;
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result[2][0] = rect.xmax;
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result[2][1] = rect.ymax;
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result[3][0] = rect.xmin;
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result[3][1] = rect.ymax;
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}
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void ensure_format()
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{
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if (format.attr_len == 0) {
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GPU_vertformat_attr_add(&format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
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GPU_vertformat_attr_add(&format, "uv", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
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pos_id = GPU_vertformat_attr_id_get(&format, "pos");
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uv_id = GPU_vertformat_attr_id_get(&format, "uv");
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}
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}
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};
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