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Examples: Vulkan: Support draw_data->FramebufferScale correctly matching a79785c for on Metal/GL2/GL3. (#2306, #1676)

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omar 2019-02-16 12:27:46 +01:00
parent f977871854
commit dd14adc731
2 changed files with 21 additions and 10 deletions
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4
docs/CHANGELOG.txt
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@ -81,8 +81,8 @@ Other Changes:
- ImFontAtlas: FreeType: Fixed using imgui_freetype.cpp in unity builds. (#2302)
- Demo: Fixed "Log" demo not initializing properly, leading to the first line not showing before a Clear. (#2318) [@bluescan]
- Demo: Added "Auto-scroll" option in Log/Console demos. (#2300) [@nicolasnoble, @ocornut]
- Examples: Metal, OpenGL2, OpenGL3: Fixed offsetting of clipping rectangle with ImDrawData::DisplayPos != (0,0) when
the display frame-buffer scale scale is not (1,1). While this doesn't make a difference when using master branch,
- Examples: Metal, OpenGL2, OpenGL3, Vulkan: Fixed offsetting of clipping rectangle with ImDrawData::DisplayPos != (0,0)
when the display frame-buffer scale scale is not (1,1). While this doesn't make a difference when using master branch,
this is effectively fixing support for multi-viewport with Mac Retina Displays on those examples. (#2306) [@rasky, @ocornut]
Also using ImDrawData::FramebufferScale instead of io.DisplayFramebufferScale.
- Examples: Clarified the use the ImDrawData::DisplayPos to offset clipping rectangles.

27
examples/imgui_impl_vulkan.cpp
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@ -13,6 +13,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2019-02-16: Vulkan: Viewport and clipping rectangles correctly using draw_data->FramebufferScale to allow retina display.
// 2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
// 2018-08-25: Vulkan: Fixed mishandled VkSurfaceCapabilitiesKHR::maxImageCount=0 case.
// 2018-06-22: Inverted the parameters to ImGui_ImplVulkan_RenderDrawData() to be consistent with other bindings.
@ -266,8 +267,8 @@ void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer comm
VkViewport viewport;
viewport.x = 0;
viewport.y = 0;
viewport.width = draw_data->DisplaySize.x;
viewport.height = draw_data->DisplaySize.y;
viewport.width = draw_data->DisplaySize.x * draw_data->FramebufferScale.x;
viewport.height = draw_data->DisplaySize.y * draw_data->FramebufferScale.y;
viewport.minDepth = 0.0f;
viewport.maxDepth = 1.0f;
vkCmdSetViewport(command_buffer, 0, 1, &viewport);
@ -286,10 +287,13 @@ void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer comm
vkCmdPushConstants(command_buffer, g_PipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, sizeof(float) * 2, sizeof(float) * 2, translate);
}
// Render the command lists:
// Will project scissor/clipping rectangles into framebuffer space
ImVec2 clip_off = draw_data->DisplayPos; // (0,0) unless using multi-viewports
ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
// Render command lists
int vtx_offset = 0;
int idx_offset = 0;
ImVec2 clip_off = draw_data->DisplayPos;
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
@ -302,13 +306,20 @@ void ImGui_ImplVulkan_RenderDrawData(ImDrawData* draw_data, VkCommandBuffer comm
}
else
{
// Project scissor/clipping rectangles into framebuffer space
ImVec4 clip_rect;
clip_rect.x = (pcmd->ClipRect.x - clip_off.x) * clip_scale.x;
clip_rect.y = (pcmd->ClipRect.y - clip_off.y) * clip_scale.y;
clip_rect.z = (pcmd->ClipRect.z - clip_off.x) * clip_scale.x;
clip_rect.w = (pcmd->ClipRect.w - clip_off.y) * clip_scale.y;
// Apply scissor/clipping rectangle
// FIXME: We could clamp width/height based on clamped min/max values.
VkRect2D scissor;
scissor.offset.x = (int32_t)(pcmd->ClipRect.x - clip_off.x) > 0 ? (int32_t)(pcmd->ClipRect.x - clip_off.x) : 0;
scissor.offset.y = (int32_t)(pcmd->ClipRect.y - clip_off.y) > 0 ? (int32_t)(pcmd->ClipRect.y - clip_off.y) : 0;
scissor.extent.width = (uint32_t)(pcmd->ClipRect.z - pcmd->ClipRect.x);
scissor.extent.height = (uint32_t)(pcmd->ClipRect.w - pcmd->ClipRect.y + 1); // FIXME: Why +1 here?
scissor.offset.x = ((int32_t)clip_rect.x > 0) ? (int32_t)(clip_rect.x) : 0;
scissor.offset.y = ((int32_t)clip_rect.y > 0) ? (int32_t)(clip_rect.y) : 0;
scissor.extent.width = (uint32_t)(clip_rect.z - clip_rect.x);
scissor.extent.height = (uint32_t)(clip_rect.w - clip_rect.y + 1); // FIXME: Why +1 here?
vkCmdSetScissor(command_buffer, 0, 1, &scissor);
// Draw