pvr::Result::Enum OGLESIntroducingPVRApi::initView() {
onscreenFB = getGraphicsContext()->createOnScreenFboSet();
for (int i = 0 ; i < getSwapChainLength(); i++){
onscreenCBArray.add(getGraphicsContext()->createCommandBufferOnDefaultPool());
auto & cb = onscreenCBArray[i];
auto & frameBuffer = onscreenFB[i];
cb->beginRecording();
cb->beginRenderPass(frameBuffer, pvr::Rectanglei(0, 0, getWidth(), getHeight()),false,
glm::vec4(123.0 / 255.0, 172.0 / 255.0, 189.0 / 255.0, 1.0));
cb->endRenderPass();
cb->endRecording();
}
return pvr::Result::Success;
};
bool mswindow::Render()
{
getGraphicsContext()->render();
this->currentTime++;
int vatnikTextureIndex = (this->currentTime / 4) % (this->vatnikTexturesRepresentations.size() - 1);
this->vatnikLayer->setTexture(vatnikTextures[vatnikTextureIndex]);
if (this->punisherWalk)
{
this->punisherLayer->setTexture(this->punisherTextures[vatnikTextureIndex]);
}
else
{
this->punisherLayer->setTexture(this->punisherTextures[0]);
}
SwapBuffers(hdc);
return true;
}
pvr::Result::Enum OGLESIntroducingPVRApi::initView() {
// Short hand variable for graphics context object
gc = getGraphicsContext();
// Get our on screen frame buffers - we create a command buffer for each
onscreenFBArray = gc->createOnScreenFboSet();
// Setup our vertex buffer with a triangle
vertexBuffer = gc->createBuffer(sizeof(glm::float32) * 3 * 3, pvr::types::BufferBindingUse::VertexBuffer);
// Co-ordinate systems differ between Vulkan and OpenGL ES (y axis flipped)
// Note that asset loading code in part 3 abstracts this for us - only needed for raw vertex data
float vertPos = 0.8;
float vulkanTriangle[] = {
0.0, -vertPos, 0.0,
-vertPos, vertPos, 0.0,
vertPos, vertPos, 0.0,
};
float glTriangle[] = {
0.0, vertPos, 0.0,
-vertPos, -vertPos, 0.0,
vertPos, -vertPos, 0.0
};
float * triangleVertices =
(pvr::Api::Enum::Vulkan == gc->getApiType()) ? vulkanTriangle: glTriangle;
vertexBuffer->update(triangleVertices, 0, sizeof(vulkanTriangle));
/* Create our pipeline parameter object which will be passed to createPipeline
As in the blog post to create a pipeline we need to provide:
Render pass information
Vertex layout information
Shaders
Shader layout information through descriptor set layouts
With a valid pipeline created, to issue a draw we require:
A vertex buffer matching the vertex layout to bind data to draw with
Descriptor sets matching descript set layouts to bind data to our shaders
Note that to handle pre ES 3.1 paths we also need to provide paths to update uniforms without descriptor sets (no UBO)
*/
// Create a pipeline
pvr::api::GraphicsPipelineCreateParam opaquePipeParameters = pvr::api::GraphicsPipelineCreateParam();
// Set up the vertex layout for our pipeline
opaquePipeParameters.vertexInput.addVertexAttribute(0, pvr::api::VertexAttributeInfo(0, pvr::types::DataType::Float32, 3, 0, "inVertex"));
opaquePipeParameters.vertexInput.setInputBinding(0, sizeof(glm::float32) * 3);
opaquePipeParameters.inputAssembler.setPrimitiveTopology(pvr::types::PrimitiveTopology::TriangleList);
// Set up shaders for our pipeline
// Build system automatically compiles shader to spir-v binary for us on Vulkan
pvr::api::Shader vert = gc->createShader(
*getAssetStream("shader.vert"),
pvr::types::ShaderType::VertexShader);
pvr::api::Shader frag = gc->createShader(
*getAssetStream("shader.frag"),
pvr::types::ShaderType::FragmentShader);
opaquePipeParameters.fragmentShader.setShader(frag);
opaquePipeParameters.vertexShader.setShader(vert);
pvr::api::DescriptorSet uboDescriptorSet;
// Set up our uniform for rotating the triangle - we use a different path for pre ES 3.1 by checking getApiType() for Vulkan
if (pvr::Api::Enum::Vulkan == gc->getApiType()) {
// Create a UBO
rotateUbo = gc->createBufferAndView(4, pvr::types::BufferBindingUse::UniformBuffer);
rotateUbo->update(&rotateValue, 0, 4);
// Create a descriptor set layout for the uniform
pvr::api::DescriptorSetLayout uboDescriptSetLayout = gc->createDescriptorSetLayout(pvr::api::DescriptorSetLayoutCreateParam().setBinding(0, pvr::types::DescriptorType::UniformBuffer, 1, pvr::types::ShaderStageFlags::Vertex));
// Attach this layout to the pipeline
pvr::api::PipelineLayout uboPipelineLayout = gc->createPipelineLayout(pvr::api::PipelineLayoutCreateParam().addDescSetLayout(uboDescriptSetLayout));
opaquePipeParameters.pipelineLayout = uboPipelineLayout;
// Create the descriptor set we will bind to this layout when drawing
uboDescriptorSet = gc->createDescriptorSetOnDefaultPool(uboDescriptSetLayout);
// Point the descriptor set to point to our UBO
uboDescriptorSet->update(pvr::api::DescriptorSetUpdate().setUbo(0, rotateUbo));
// Set an initial value for the UBO
rotateUbo->update(&rotateValue, 0, 4);
}else{
// No descriptor sets required in this case on pre ES 3.1 path so we use a default pipeline layout (empty)
opaquePipeParameters.pipelineLayout = pvr::api::PipelineLayout();
}
// Set up render pass and blend state
opaquePipeParameters.colorBlend.setAttachmentState(0, pvr::api::pipelineCreation::ColorBlendAttachmentState());
opaquePipeParameters.renderPass = onscreenFBArray[0]->getRenderPass();
// With the pipeline fully configured we now create the pipeline object
opaquePipeline = gc->createGraphicsPipeline(opaquePipeParameters);
// For pre ES3.1 we now have linked shaders so can call getUniformLocation to set up the rotate uniform
int rotateLoc = 0;
if (!(gc->getApiType() == pvr::Api::Enum::Vulkan)) {
rotateLoc = opaquePipeline->getUniformLocation("rotate");
}
for (int i = 0 ; i < gc->getPlatformContext().getSwapChainLength(); i++){
// Create a command buffer for each frame buffer in swap chain
onscreenCBArray.add(gc->createCommandBufferOnDefaultPool());
pvr::api::CommandBuffer & cb= onscreenCBArray[i];
// Begin recording to the command buffer
cb->beginRecording();
// Begin the render pass using our FBO object - this contains the render pass settings
cb->beginRenderPass(onscreenFBArray[i],
pvr::Rectanglei(0, 0, getWidth(), getHeight()),
false);
// Bind the pipeline object
cb->bindPipeline(opaquePipeline);
// Update our uniform for Vulkan and ES 2.0/3.0/3.1 paths
if (gc->getApiType() == pvr::Api::Enum::Vulkan) {
cb->bindDescriptorSet(opaquePipeline->getPipelineLayout(), 0, uboDescriptorSet);
}else{
// This function will poll the pointed to memory to set the uniform for each draw
cb->setUniformPtr(rotateLoc, 1, &rotateValue);
}
// Bind our vertex buffer
cb->bindVertexBuffer(vertexBuffer, 0, 0);
// Draw our triangle
cb->drawArrays(0, 3,0,1);
cb->endRenderPass();
cb->endRecording();
}
return pvr::Result::Success;
};
