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First cut at Drawable fundamentals (#983)

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Co-authored-by: mwilsnd <mwilsnd@gmail.com>
Co-authored-by: Alex Cristici <alex.cristici@gmail.com>
This commit is contained in:
Tim Sylvester
2023-04-17 09:58:57 -07:00
committed by Bart Louwers
parent 42afe4189c
commit 14b53e54ec
60 changed files with 1904 additions and 87 deletions
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75
src/mbgl/renderer/renderer_impl.cpp
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@@ -2,17 +2,20 @@
#include <mbgl/geometry/line_atlas.hpp>
#include <mbgl/gfx/backend_scope.hpp>
#include <mbgl/gfx/renderer_backend.hpp>
#include <mbgl/gfx/upload_pass.hpp>
#include <mbgl/gfx/render_pass.hpp>
#include <mbgl/gfx/cull_face_mode.hpp>
#include <mbgl/gfx/context.hpp>
#include <mbgl/gfx/cull_face_mode.hpp>
#include <mbgl/gfx/drawable_tweaker.hpp>
#include <mbgl/gfx/render_pass.hpp>
#include <mbgl/gfx/renderer_backend.hpp>
#include <mbgl/gfx/renderable.hpp>
#include <mbgl/gfx/upload_pass.hpp>
#include <mbgl/gl/drawable_gl.hpp>
#include <mbgl/programs/programs.hpp>
#include <mbgl/renderer/pattern_atlas.hpp>
#include <mbgl/renderer/renderer_observer.hpp>
#include <mbgl/renderer/render_static_data.hpp>
#include <mbgl/renderer/render_tree.hpp>
#include <mbgl/shaders/gl/shader_program_gl.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/util/logging.hpp>
@@ -73,6 +76,8 @@ void Renderer::Impl::render(const RenderTree& renderTree) {
renderTree.getLineAtlas(),
renderTree.getPatternAtlas()};
orchestrator.updateLayers(parameters);
parameters.symbolFadeChange = renderTreeParameters.symbolFadeChange;
parameters.opaquePassCutoff = renderTreeParameters.opaquePassCutOff;
const auto& sourceRenderItems = renderTree.getSourceRenderItems();
@@ -93,6 +98,47 @@ void Renderer::Impl::render(const RenderTree& renderTree) {
staticData->upload(*uploadPass);
renderTree.getLineAtlas().upload(*uploadPass);
renderTree.getPatternAtlas().upload(*uploadPass);
for (const auto& pair : orchestrator.getDrawables()) {
auto& drawable = *pair.second;
// Run tweakers to update any dynamic elements
for (auto& tweaker : drawable.getTweakers()) {
tweaker->execute(drawable, parameters);
}
// Generate a vertex array object for the drawable state, if necessary
auto& drawableGL = static_cast<gl::DrawableGL&>(drawable);
if (!drawableGL.getVertexArray().isValid() && !drawable.getShaderID().empty()) {
// TODO: avoid having to do this lookup twice
if (auto shader = parameters.shaders.get<gl::ShaderProgramGL>(drawable.getShaderID())) {
const auto usage = gfx::BufferUsageType::StaticDraw;
// Build index buffer
const auto& indexData = drawable.getIndexData();
auto indexBuffer = gfx::IndexBuffer {
indexData.size(),
uploadPass->createIndexBufferResource(
&indexData[0],
indexData.size() * sizeof(indexData[0]),
usage)
};
// Apply drawable values to shader defaults
const auto& defaults = shader->getVertexAttributes();
const auto& overrides = drawable.getVertexAttributes();
auto bindingsAndBuffer = uploadPass->buildAttributeBindings(defaults, overrides, usage);
auto& glContext = static_cast<gl::Context&>(context);
auto vertexArray = glContext.createVertexArray();
vertexArray.bind(glContext, indexBuffer, bindingsAndBuffer.first);
drawableGL.setVertexArray(std::move(vertexArray),
std::move(bindingsAndBuffer.second),
std::move(indexBuffer));
}
}
}
}
// - 3D PASS
@@ -143,6 +189,27 @@ void Renderer::Impl::render(const RenderTree& renderTree) {
parameters.depthRangeSize = 1 - (layerRenderItems.size() + 2) * parameters.numSublayers * parameters.depthEpsilon;
// Run changes
orchestrator.processChanges();
// Draw Drawables
{
for (const auto &pair : orchestrator.getDrawables()) {
const auto& drawable = *pair.second;
if (!drawable.getShaderID().empty()) {
// if shader != currentShader
if (auto shader = parameters.shaders.get<gl::ShaderProgramGL>(drawable.getShaderID())) {
// Context.activate(shader)
}
}
// Context.bind(drawable vao)
drawable.draw(parameters);
}
}
// - OPAQUE PASS -------------------------------------------------------------------------------
// Render everything top-to-bottom by using reverse iterators. Render opaque objects first.
{