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Updated ImGui example to support recent ImGui version

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Refs #496
This commit is contained in:
saschawillems 2018-08-29 18:24:39 +02:00
parent 818154b250
commit 3bbf0d8f29
1 changed files with 29 additions and 20 deletions
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49
examples/imgui/main.cpp
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@ -74,10 +74,12 @@ public:
ImGUI(VulkanExampleBase *example) : example(example)
{
device = example->vulkanDevice;
ImGui::CreateContext();
};
~ImGUI()
{
ImGui::DestroyContext();
// Release all Vulkan resources required for rendering imGui
vertexBuffer.destroy();
indexBuffer.destroy();
@ -375,7 +377,7 @@ public:
ImGui::End();
ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCond_FirstUseEver);
ImGui::ShowTestWindow();
ImGui::ShowDemoWindow();
// Render to generate draw buffers
ImGui::Render();
@ -390,6 +392,10 @@ public:
VkDeviceSize vertexBufferSize = imDrawData->TotalVtxCount * sizeof(ImDrawVert);
VkDeviceSize indexBufferSize = imDrawData->TotalIdxCount * sizeof(ImDrawIdx);
if ((vertexBufferSize == 0) || (indexBufferSize == 0)) {
return;
}
// Update buffers only if vertex or index count has been changed compared to current buffer size
// Vertex buffer
@ -437,11 +443,6 @@ public:
vkCmdBindDescriptorSets(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, nullptr);
vkCmdBindPipeline(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
// Bind vertex and index buffer
VkDeviceSize offsets[1] = { 0 };
vkCmdBindVertexBuffers(commandBuffer, 0, 1, &vertexBuffer.buffer, offsets);
vkCmdBindIndexBuffer(commandBuffer, indexBuffer.buffer, 0, VK_INDEX_TYPE_UINT16);
VkViewport viewport = vks::initializers::viewport(ImGui::GetIO().DisplaySize.x, ImGui::GetIO().DisplaySize.y, 0.0f, 1.0f);
vkCmdSetViewport(commandBuffer, 0, 1, &viewport);
@ -454,22 +455,30 @@ public:
ImDrawData* imDrawData = ImGui::GetDrawData();
int32_t vertexOffset = 0;
int32_t indexOffset = 0;
for (int32_t i = 0; i < imDrawData->CmdListsCount; i++)
{
const ImDrawList* cmd_list = imDrawData->CmdLists[i];
for (int32_t j = 0; j < cmd_list->CmdBuffer.Size; j++)
if (imDrawData->CmdListsCount > 0) {
VkDeviceSize offsets[1] = { 0 };
vkCmdBindVertexBuffers(commandBuffer, 0, 1, &vertexBuffer.buffer, offsets);
vkCmdBindIndexBuffer(commandBuffer, indexBuffer.buffer, 0, VK_INDEX_TYPE_UINT16);
for (int32_t i = 0; i < imDrawData->CmdListsCount; i++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[j];
VkRect2D scissorRect;
scissorRect.offset.x = std::max((int32_t)(pcmd->ClipRect.x), 0);
scissorRect.offset.y = std::max((int32_t)(pcmd->ClipRect.y), 0);
scissorRect.extent.width = (uint32_t)(pcmd->ClipRect.z - pcmd->ClipRect.x);
scissorRect.extent.height = (uint32_t)(pcmd->ClipRect.w - pcmd->ClipRect.y);
vkCmdSetScissor(commandBuffer, 0, 1, &scissorRect);
vkCmdDrawIndexed(commandBuffer, pcmd->ElemCount, 1, indexOffset, vertexOffset, 0);
indexOffset += pcmd->ElemCount;
const ImDrawList* cmd_list = imDrawData->CmdLists[i];
for (int32_t j = 0; j < cmd_list->CmdBuffer.Size; j++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[j];
VkRect2D scissorRect;
scissorRect.offset.x = std::max((int32_t)(pcmd->ClipRect.x), 0);
scissorRect.offset.y = std::max((int32_t)(pcmd->ClipRect.y), 0);
scissorRect.extent.width = (uint32_t)(pcmd->ClipRect.z - pcmd->ClipRect.x);
scissorRect.extent.height = (uint32_t)(pcmd->ClipRect.w - pcmd->ClipRect.y);
vkCmdSetScissor(commandBuffer, 0, 1, &scissorRect);
vkCmdDrawIndexed(commandBuffer, pcmd->ElemCount, 1, indexOffset, vertexOffset, 0);
indexOffset += pcmd->ElemCount;
}
vertexOffset += cmd_list->VtxBuffer.Size;
}
vertexOffset += cmd_list->VtxBuffer.Size;
}
}