src/ngfx/drawOps/DrawTextureOp.cpp

Source code

/*
 * Copyright 2020 GoPro Inc.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
#include "ngfx/drawOps/DrawTextureOp.h"
#include "ngfx/graphics/BufferUtil.h"
#include "ngfx/graphics/Config.h"
#include "ngfx/graphics/ShaderModule.h"
using namespace ngfx;
using namespace glm;

DrawTextureOp::DrawTextureOp(GraphicsContext *ctx, Texture *texture,
                             const std::vector<glm::vec2> &pos,
                             const std::vector<glm::vec2> &texCoord)
    : DrawOp(ctx), texture(texture) {
  bPos.reset(createVertexBuffer<vec2>(ctx, pos));
  bTexCoord.reset(createVertexBuffer<vec2>(ctx, texCoord));
  numVerts = uint32_t(pos.size());
  createPipeline();
  graphicsPipeline->getBindings({&U_TEXTURE}, {&B_POS, &B_TEXCOORD});
}

void DrawTextureOp::draw(CommandBuffer *commandBuffer, Graphics *graphics) {
  graphics->bindGraphicsPipeline(commandBuffer, graphicsPipeline);
  graphics->bindVertexBuffer(commandBuffer, bPos.get(), B_POS, sizeof(vec2));
  graphics->bindVertexBuffer(commandBuffer, bTexCoord.get(), B_TEXCOORD,
                             sizeof(vec2));
  graphics->bindTexture(commandBuffer, texture, U_TEXTURE);
  graphics->draw(commandBuffer, numVerts);
}
void DrawTextureOp::createPipeline() {
  const std::string key = "drawTextureOp";
  graphicsPipeline = (GraphicsPipeline *)ctx->pipelineCache->get(key);
  if (graphicsPipeline)
    return;
  GraphicsPipeline::State state;
  state.renderPass = ctx->defaultRenderPass;
  state.primitiveTopology = PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP;
  auto device = ctx->device;
  graphicsPipeline = GraphicsPipeline::create(
      ctx, state,
      VertexShaderModule::create(device, NGFX_DATA_DIR "/drawTexture.vert")
          .get(),
      FragmentShaderModule::create(device, NGFX_DATA_DIR "/drawTexture.frag")
          .get(),
      ctx->surfaceFormat, ctx->depthFormat);
  ctx->pipelineCache->add(key, graphicsPipeline);
}

---

Updated on 3 April 2021 at 20:21:51 PDT