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Activate imgui shader only once.

This commit is contained in:
Attila Uygun 2023-10-22 23:35:46 +02:00
parent 4cc2c03afe
commit 3125bb9c95
1 changed files with 8 additions and 8 deletions
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16
src/engine/imgui_backend.cc
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@ -15,6 +15,10 @@ using namespace base;
namespace eng {
namespace {
const char vertex_description[] = "p2f;t2f;c4b";
} // namespace
ImguiBackend::ImguiBackend() : shader_{std::make_unique<Shader>(nullptr)} {}
ImguiBackend::~ImguiBackend() = default;
@ -54,7 +58,6 @@ void ImguiBackend::CreateRenderResources(Renderer* renderer) {
auto source = std::make_unique<ShaderSource>();
if (source->Load("engine/imgui.glsl")) {
static const char vertex_description[] = "p2f;t2f;c4b";
VertexDescription vd;
if (!ParseVertexDescription(vertex_description, vd)) {
DLOG(0) << "Failed to parse vertex description.";
@ -113,9 +116,12 @@ void ImguiBackend::Render() {
base::Matrix4f ortho_projection;
ortho_projection.CreateOrthoProjection(L, R, B, T);
shader_->Activate();
shader_->SetUniform("projection", ortho_projection);
shader_->UploadUniforms();
for (int n = 0; n < draw_data->CmdListsCount; n++) {
const ImDrawList* cmd_list = draw_data->CmdLists[n];
static const char vertex_description[] = "p2f;t2f;c4b";
auto mesh = std::make_unique<Mesh>();
mesh->Create(kPrimitive_Triangles, vertex_description,
cmd_list->VtxBuffer.Size, cmd_list->VtxBuffer.Data,
@ -127,12 +133,6 @@ void ImguiBackend::Render() {
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
reinterpret_cast<Texture*>(pcmd->GetTexID())->Activate();
// Vulkan renderer needs activating the shader again after a texture.
// TODO: Fix it in vulkan renderer and active the shader only once.
shader_->Activate();
shader_->SetUniform("projection", ortho_projection);
shader_->UploadUniforms();
if (pcmd->ClipRect.z > pcmd->ClipRect.x &&
pcmd->ClipRect.w > pcmd->ClipRect.y) {
renderer_->SetScissor(int(pcmd->ClipRect.x), int(pcmd->ClipRect.y),