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[vulkan] Add cvars to control vulkan 3d frame buffer size

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Thanks to the 3d frame buffer output being separate from the swap chain,
it's possible to have a different frame buffer size from the window
size, allowing for a smaller buffer and thus my laptop can cope (mostly)
with the vulkan renderer.
This commit is contained in:
Bill Currie 2022-12-02 13:17:07 +09:00
parent 9b609469ed
commit 1d84d54509
3 changed files with 31 additions and 0 deletions
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3
include/QF/Vulkan/qf_vid.h
View file

@ -98,4 +98,7 @@ void Vulkan_BeginEntityLabel (struct vulkan_ctx_s *ctx, VkCommandBuffer cmd,
struct plitem_s *Vulkan_GetConfig (struct vulkan_ctx_s *ctx, const char *name);
extern int vulkan_frame_width;
extern int vulkan_frame_height;
#endif // __QF_Vulkan_vid_h

6
libs/video/renderer/vulkan/vulkan_main.c
View file

@ -181,6 +181,12 @@ Vulkan_Main_CreateRenderPasses (vulkan_ctx_t *ctx)
.extent = ctx->swapchain->extent,
.frames = ctx->swapchain->numImages,
};
if (vulkan_frame_width > 0) {
rp->output.extent.width = vulkan_frame_width;
}
if (vulkan_frame_height > 0) {
rp->output.extent.height = vulkan_frame_height;
}
QFV_RenderPass_CreateAttachments (rp);
QFV_RenderPass_CreateRenderPass (rp);
QFV_RenderPass_CreateFramebuffer (rp);

22
libs/video/renderer/vulkan/vulkan_vid_common.c
View file

@ -63,6 +63,26 @@
#include "vid_vulkan.h"
#include "vkparse.h"
int vulkan_frame_width;
static cvar_t vulkan_frame_width_cvar = {
.name = "vulkan_frame_width",
.description =
"Width of 3D view buffer. Set to 0 for automatic sizing.",
.default_value = "0",
.flags = CVAR_NONE,
.value = { .type = &cexpr_int, .value = &vulkan_frame_width },
};
int vulkan_frame_height;
static cvar_t vulkan_frame_height_cvar = {
.name = "vulkan_frame_height",
.description =
"Height of 3D view buffer. Set to 0 for automatic sizing.",
.default_value = "0",
.flags = CVAR_NONE,
.value = { .type = &cexpr_int, .value = &vulkan_frame_height },
};
static const char *instance_extensions[] = {
VK_KHR_SURFACE_EXTENSION_NAME,
VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME,
@ -79,6 +99,8 @@ Vulkan_Init_Common (vulkan_ctx_t *ctx)
{
Sys_MaskPrintf (SYS_vulkan, "Vulkan_Init_Common\n");
Cvar_Register (&vulkan_frame_width_cvar, 0, 0);
Cvar_Register (&vulkan_frame_height_cvar, 0, 0);
Vulkan_Init_Cvars ();
R_Init_Cvars ();
Vulkan_Script_Init (ctx);