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https://git.code.sf.net/p/quake/quakeforge
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668f7f2cd2
As the RGB curves for many of the color rows are not linearly related, my idea of scaling the brightest color in the row just didn't work. Using a masked palette lookup works much better as it allows any curves. Also, because the palette is uploaded as a grid and the coordinates are calculated on the CPU, the system is extendable beyond 8-bit palettes. This isn't quite complete as the top and bottom colors are still in separate layers but their indices and masks can fit in just one, but this requires reworking the texture setup (for another commit).
106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
/*
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vulkan_palette.c
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Vulkan palette image
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Copyright (C) 2022 Bill Currie <bill@taniwha.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#ifdef HAVE_MATH_H
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# include <math.h>
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#endif
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#include "QF/sys.h"
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#include "QF/va.h"
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#include "QF/Vulkan/instance.h"
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#include "QF/Vulkan/qf_palette.h"
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#include "QF/Vulkan/qf_texture.h"
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#include "vid_vulkan.h"
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void
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Vulkan_Palette_Update (vulkan_ctx_t *ctx, const byte *palette)
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{
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palettectx_t *pctx = ctx->palette_context;
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tex_t tex = {
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.width = 16,
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.height = 16,
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.format = tex_rgb,
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.loaded = 1,
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.data = (byte *) palette,
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};
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Vulkan_UpdateTex (ctx, pctx->palette, &tex, 0, 0, 0, 0);
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}
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void
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Vulkan_Palette_Init (vulkan_ctx_t *ctx, const byte *palette)
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{
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qfvPushDebug (ctx, "palette init");
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palettectx_t *pctx = calloc (1, sizeof (palettectx_t));
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ctx->palette_context = pctx;
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pctx->sampler = Vulkan_CreateSampler (ctx, "palette_sampler");
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tex_t tex = {
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.width = 16,
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.height = 16,
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.format = tex_rgb,
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.loaded = 1,
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.data = (byte *) palette,
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};
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pctx->palette = Vulkan_LoadTex (ctx, &tex, 0, "palette");
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pctx->descriptor = Vulkan_CreateCombinedImageSampler (ctx,
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pctx->palette->view,
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pctx->sampler);
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qfvPopDebug (ctx);
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}
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void
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Vulkan_Palette_Shutdown (vulkan_ctx_t *ctx)
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{
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qfvPushDebug (ctx, "palette shutdown");
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__auto_type pctx = ctx->palette_context;
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Vulkan_UnloadTex (ctx, pctx->palette);
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free (pctx);
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qfvPopDebug (ctx);
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}
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VkDescriptorSet
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Vulkan_Palette_Descriptor (struct vulkan_ctx_s *ctx)
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{
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__auto_type pctx = ctx->palette_context;
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return pctx->descriptor;
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}
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