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#include "atlas.h"
#include <cstring>
#include "mimalloc.h"
#include "utils.h"
static void wayc_atlas_gpu_usage_desc(struct sg_image_usage* usage) {
wayc_notnull(usage);
usage->immutable = false;
usage->dynamic_update = true;
}
static void wayc_atlas_gpu_desc(struct sg_image_desc* desc, u32 width,
u32 height, enum sg_pixel_format format) {
wayc_notnull(desc);
struct sg_image_usage usage = {};
wayc_atlas_gpu_usage_desc(&usage);
desc->type = SG_IMAGETYPE_2D;
desc->width = width;
desc->height = height;
desc->num_mipmaps = 1;
desc->pixel_format = format;
desc->usage = usage;
}
static inline usize wayc_atlas_size(struct atlas_s* atlas) {
wayc_notnull(atlas);
return atlas->width * atlas->height;
}
enum atlas_error_e wayc_atlas_init(struct atlas_s* atlas, u32 width, u32 height,
enum sg_pixel_format format) {
wayc_notnull(atlas);
memset(atlas, 0, sizeof(*atlas));
bool success = false;
usize atlas_size = width * height;
u8* cpu_atlas = (u8*)mi_malloc(atlas_size);
wayc_defer_cond(mi_free(cpu_atlas), success, true);
struct sg_image_desc desc = {};
wayc_atlas_gpu_desc(&desc, width, height, format);
struct sg_image gpu_atlas = sg_make_image(&desc);
if (sg_query_image_state(gpu_atlas) != SG_RESOURCESTATE_VALID)
return ATLAS_ERROR_GPU_ATLAS;
atlas->width = width;
atlas->height = height;
atlas->cpu_atlas = cpu_atlas;
atlas->gpu_atlas = gpu_atlas;
atlas->cpu_dirty = false;
success = true;
return ATLAS_ERROR_NONE;
}
enum atlas_error_e wayc_atlas_flush(struct atlas_s* atlas) {
wayc_notnull(atlas);
if (!atlas->cpu_dirty) return ATLAS_ERROR_NONE;
struct sg_range range = {};
range.ptr = atlas->cpu_atlas;
range.size = wayc_atlas_size(atlas);
struct sg_image_data data = {};
data.mip_levels[0] = range;
sg_update_image(atlas->gpu_atlas, &data);
if (sg_query_image_state(atlas->gpu_atlas) != SG_RESOURCESTATE_VALID)
return ATLAS_ERROR_UPLOAD_FAILED;
atlas->cpu_dirty = false;
return ATLAS_ERROR_NONE;
}
void wayc_atlas_deinit(struct atlas_s* atlas) {
wayc_notnull(atlas);
enum sg_resource_state state = sg_query_image_state(atlas->gpu_atlas);
if (atlas->cpu_atlas == nullptr || state != SG_RESOURCESTATE_VALID) return;
sg_destroy_image(atlas->gpu_atlas);
mi_free(atlas->cpu_atlas);
atlas->width = 0;
atlas->height = 0;
atlas->cpu_atlas = nullptr;
atlas->gpu_atlas = {};
}
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