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Replace uniform with storage buffer for instances

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Signed-off-by: Piotr Krygier <piotrkrygier@everyonecancode@xyz>
This commit is contained in:
Piotr Krygier
2026-02-10 19:07:40 +01:00
parent ff527767b9
commit de597ebc5d
3 changed files with 16 additions and 12 deletions
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graphics/shaders/shader.vert
+2 -4
View File
@@ -6,8 +6,6 @@ layout(push_constant) uniform pc {
mat4 proj;
} ubo;
#define MAX_INSTANCES 1024
struct InstanceData
{
vec3 pos;
@@ -16,8 +14,8 @@ struct InstanceData
uint texture_id;
};
layout(binding = 0) uniform InstanceUniformBuffer {
InstanceData instances[MAX_INSTANCES];
layout(set=0, binding = 0, std430) readonly buffer InstanceBuffer {
InstanceData instances[];
};
layout(location = 0) in vec3 inPosition;
graphics/src/rse_graphics.c
+3 -4
View File
@@ -5,7 +5,6 @@
#include <SDL3/SDL_render.h>
#include <cglm/util.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <vulkan/vulkan_core.h>
@@ -203,14 +202,14 @@ rse_err_t rse_graphics_test_function(struct rse_graphics_context_t* rse_context)
STATUS_CHECK(sampler_create(context, &context->vulkan_handles.sampler));
STATUS_CHECK(descriptor_pool_add_type(context, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1));
STATUS_CHECK(descriptor_pool_add_type(context, VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1));
STATUS_CHECK(descriptor_pool_add_type(context, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, TEXTURES_COUNT));
STATUS_CHECK(descriptor_pool_initialize(context));
/* Normal rendering */
STATUS_CHECK(descriptor_create_new_set(context, &descriptor_set_handle));
STATUS_CHECK(
descriptor_add_layout(&layout_bindings, 0, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1, VK_SHADER_STAGE_VERTEX_BIT));
descriptor_add_layout(&layout_bindings, 0, VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1, VK_SHADER_STAGE_VERTEX_BIT));
STATUS_CHECK(descriptor_add_layout(&layout_bindings,
1,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
@@ -223,7 +222,7 @@ rse_err_t rse_graphics_test_function(struct rse_graphics_context_t* rse_context)
descriptor_set_handle,
&context->render_targets[RENDER_TARGET_3D].instance_buffer,
0,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER));
VK_DESCRIPTOR_TYPE_STORAGE_BUFFER));
STATUS_CHECK(descriptor_attach_images(context,
descriptor_set_handle,
graphics/src/vulkan_buffers.c
+11 -4
View File
@@ -119,7 +119,12 @@ static rse_err_t create_instance_buffers(struct graphics_context_t* context)
buffer_size = sizeof(struct instance_data_t) * MAX_INSTANCE_NUMBER;
STATUS_CHECK(
buffer_create_uniform(context, &context->render_targets[RENDER_TARGET_3D].instance_buffer, buffer_size));
create_buffer(context,
buffer_size,
VK_BUFFER_USAGE_STORAGE_BUFFER_BIT,
VMA_MEMORY_USAGE_AUTO_PREFER_HOST,
VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT | VMA_ALLOCATION_CREATE_MAPPED_BIT,
&context->render_targets[RENDER_TARGET_3D].instance_buffer));
/* TODO: Move creation to somewhere else? */
STATUS_CHECK(create_buffer(context,
CMD_BUFFER_SIZE,
@@ -435,10 +440,12 @@ void destroy_buffers(struct graphics_context_t* context)
destroy_buffer(context, &context->render_targets[RENDER_TARGET_3D].vertex_buffer);
destroy_buffer(context, &context->render_targets[RENDER_TARGET_3D].index_buffer);
destroy_buffer(context, &context->render_targets[RENDER_TARGET_3D].draw_indirect_command_buffer);
destroy_buffer(context, &context->render_targets[RENDER_TARGET_3D].instance_buffer);
for (iter = 0U; iter < context->uniform_buffers.vulkan_buffers_count; ++iter)
{
vmaDestroyBuffer(context->vulkan_handles.allocator, context->uniform_buffers.vulkan_buffers[iter].buffer, context->uniform_buffers.vulkan_buffers[iter].allocation);
for (iter = 0U; iter < context->uniform_buffers.vulkan_buffers_count; ++iter) {
vmaDestroyBuffer(context->vulkan_handles.allocator,
context->uniform_buffers.vulkan_buffers[iter].buffer,
context->uniform_buffers.vulkan_buffers[iter].allocation);
}
context->uniform_buffers.vulkan_buffers_count = 0;