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Backends: Vulkan: Don't skip drawing when there's no vertexes to ensure that user callbacks are still processed.

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This commit is contained in:
Chris Savoie 2019-07-04 18:28:34 -07:00 committed by omar
parent d3212482fe
commit 73c30aa085
2 changed files with 6 additions and 1 deletions
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2
docs/CHANGELOG.txt
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@ -49,6 +49,8 @@ Other Changes:
- Backends: Win32: Support for #define NOGDI, won't try to call GetDeviceCaps(). (#3137, #2327)
- Backends: OpenGL: Fixed handling of GL 4.5+ glClipControl(GL_UPPER_LEFT) by inverting the
projection matrix top and bottom values. (#3143, #3146) [@u3shit]
- Backends: Vulkan: Fixed edge case where render callbacks wouldn't be called if the ImDrawData
structure didn't have any vertices. (#2697) [@kudaba]
-----------------------------------------------------------------------

5
examples/imgui_impl_vulkan.cpp
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@ -22,6 +22,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2020-04-26: Vulkan: Fixed edge case where render callbacks wouldn't be called if the ImDrawData didn't have vertices.
// 2019-08-01: Vulkan: Added support for specifying multisample count. Set ImGui_ImplVulkan_InitInfo::MSAASamples to one of the VkSampleCountFlagBits values to use, default is non-multisampled as before.
// 2019-05-29: Vulkan: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
// 2019-04-30: Vulkan: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
@ -274,6 +275,7 @@ static void ImGui_ImplVulkan_SetupRenderState(ImDrawData* draw_data, VkCommandBu
}
// Bind Vertex And Index Buffer:
if (draw_data->TotalVtxCount > 0)
{
VkBuffer vertex_buffers[1] = { rb->VertexBuffer };
VkDeviceSize vertex_offset[1] = { 0 };
@ -314,7 +316,7 @@ void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer comm
// Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
if (fb_width <= 0 || fb_height <= 0 || draw_data->TotalVtxCount == 0)
if (fb_width <= 0 || fb_height <= 0)
return;
ImGui_ImplVulkan_InitInfo* v = &g_VulkanInitInfo;
@ -343,6 +345,7 @@ void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer comm
CreateOrResizeBuffer(rb->IndexBuffer, rb->IndexBufferMemory, rb->IndexBufferSize, index_size, VK_BUFFER_USAGE_INDEX_BUFFER_BIT);
// Upload vertex/index data into a single contiguous GPU buffer
if (vertex_size > 0)
{
ImDrawVert* vtx_dst = NULL;
ImDrawIdx* idx_dst = NULL;