mirror of
https://github.com/gnif/LookingGlass.git
synced 2026-07-21 06:42:02 +00:00
79b031f061
Decode PQ/BT.2020 desktop pixels into an FP16 linear scRGB target before compositing the color cursor, ImGui, damage overlay, and letterboxing. Encode the damaged result to PQ once at the surface boundary. Keep logical AND/XOR cursor masks in the encoded domain. This preserves premultiplied cursor edges, prevents encoded-domain blending, uses the Wayland output reference white for local overlays, and keeps guest cursor white and display calibration independent from frame SDR white. It also corrects HDR-to-SDR absolute luminance scaling, gamut matrices, black handling, and buffer-age repair for the extra pass. Suppress overlays when their conversion framebuffer is unavailable rather than allowing unconverted sRGB draws into an HDR target. Use named transfer constants for cursor shader state. Convert clipped surface rectangles explicitly before using the frame-damage merge helper, which avoids mixing its unsigned type with the EGL surface rectangle type. Only advertise native PQ when the FP16 composition target is available. SDR and native scRGB retain their direct single-pass paths.
573 lines
18 KiB
C
573 lines
18 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2026 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "cursor.h"
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#include "common/debug.h"
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#include "common/locking.h"
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#include "common/option.h"
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#include "texture.h"
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#include "shader.h"
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#include "state.h"
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#include "model.h"
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#include "util.h"
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#include <stdatomic.h>
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#include <stdlib.h>
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#include <string.h>
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// these headers are auto generated by cmake
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#include "cursor.vert.h"
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#include "cursor_rgb.frag.h"
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#include "cursor_mono.frag.h"
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enum CursorTransfer
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{
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CURSOR_TRANSFER_SRGB = 0,
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CURSOR_TRANSFER_SCRGB = 1,
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CURSOR_TRANSFER_PQ = 2,
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};
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struct CursorTex
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{
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struct EGL_Texture * texture;
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struct EGL_Shader * shader;
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EGL_Uniform * uMousePos;
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EGL_Uniform * uScale;
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EGL_Uniform * uRotate;
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EGL_Uniform * uCBMode;
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EGL_Uniform * uSourceTransfer;
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EGL_Uniform * uSDRWhiteLevel;
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EGL_Uniform * uMapHDRtoSDR;
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EGL_Uniform * uMapHDRGain;
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EGL_Uniform * uMapHDRContentPeak;
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EGL_Uniform * uColorTransformFlags;
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EGL_Uniform * uColorMatrix;
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EGL_Uniform * uColorScalar;
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EGL_Uniform * uLinearComposition;
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};
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struct CursorPos
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{
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float x, y;
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};
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struct CursorSize
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{
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float w, h;
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};
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struct EGL_Cursor
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{
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LG_Lock lock;
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LG_RendererCursor type;
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int width;
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int height;
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int stride;
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uint8_t * data;
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size_t dataSize;
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bool update;
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// cursor state
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bool visible;
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LG_RendererRotate rotate;
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int cbMode;
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_Atomic(struct CursorPos) pos;
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_Atomic(struct CursorPos) hs;
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_Atomic(struct CursorSize) size;
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_Atomic(float) scale;
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_Atomic(enum CursorTransfer) sourceTransfer;
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_Atomic(float) sdrWhiteLevel;
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_Atomic(bool) mapHDRtoSDR;
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_Atomic(float) mapHDRGain;
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_Atomic(float) mapHDRContentPeak;
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bool colorTransformUpdate;
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KVMFRColorTransform pendingColorTransform;
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KVMFRColorTransform activeColorTransform;
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GLuint colorLUT;
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struct CursorTex norm;
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struct CursorTex mono;
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struct EGL_Model * model;
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};
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static bool cursorTexInit(struct CursorTex * t,
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const char * vertex_code , size_t vertex_size,
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const char * fragment_code, size_t fragment_size)
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{
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if (!egl_textureInit(&t->texture, NULL, EGL_TEXTYPE_BUFFER))
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{
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DEBUG_ERROR("Failed to initialize the cursor texture");
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return false;
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}
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if (!egl_shaderInit(&t->shader))
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{
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DEBUG_ERROR("Failed to initialize the cursor shader");
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return false;
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}
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if (!egl_shaderCompile(t->shader,
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vertex_code, vertex_size, fragment_code, fragment_size, false, NULL))
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{
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DEBUG_ERROR("Failed to compile the cursor shader");
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return false;
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}
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t->uMousePos = egl_shaderGetUniform(t->shader, "mouse" );
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t->uScale = egl_shaderGetUniform(t->shader, "scale" );
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t->uRotate = egl_shaderGetUniform(t->shader, "rotate" );
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t->uCBMode = egl_shaderGetUniform(t->shader, "cbMode" );
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t->uSourceTransfer = egl_shaderGetUniform(t->shader, "sourceTransfer");
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t->uSDRWhiteLevel = egl_shaderGetUniform(t->shader, "sdrWhiteLevel");
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t->uMapHDRtoSDR = egl_shaderGetUniform(t->shader, "mapHDRtoSDR" );
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t->uMapHDRGain = egl_shaderGetUniform(t->shader, "mapHDRGain" );
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t->uMapHDRContentPeak =
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egl_shaderGetUniform(t->shader, "mapHDRContentPeak");
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t->uColorTransformFlags =
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egl_shaderGetUniform(t->shader, "colorTransformFlags");
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t->uColorMatrix = egl_shaderGetUniform(t->shader, "colorMatrix[0]");
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t->uColorScalar =
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egl_shaderGetUniform(t->shader, "colorTransformScalar");
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t->uLinearComposition =
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egl_shaderGetUniform(t->shader, "linearComposition");
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egl_shaderAssocTextures(t->shader, 2);
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return true;
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}
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static inline void setCursorTexUniforms(EGL_Cursor * cursor,
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struct CursorTex * t, bool mono, float x, float y,
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float w, float h, float scale, bool linearComposition)
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{
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const enum CursorTransfer sourceTransfer = mono ? CURSOR_TRANSFER_SRGB :
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atomic_load(&cursor->sourceTransfer);
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egl_uniform4f (t->uMousePos , x, y, w, mono ? h / 2 : h);
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egl_uniform1f (t->uScale , scale);
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egl_uniform1i (t->uRotate , cursor->rotate);
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// The colour-blind transform is defined for SDR signals. The desktop
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// disables it while passing native HDR through, so keep the cursor on the
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// same path rather than altering encoded PQ or linear scRGB independently.
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egl_uniform1i (t->uCBMode ,
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(sourceTransfer == CURSOR_TRANSFER_SRGB ||
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atomic_load(&cursor->mapHDRtoSDR)) ?
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cursor->cbMode : 0);
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egl_uniform1i (t->uSourceTransfer , sourceTransfer);
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egl_uniform1f (t->uSDRWhiteLevel ,
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atomic_load(&cursor->sdrWhiteLevel));
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egl_uniform1i (t->uMapHDRtoSDR ,
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!mono && atomic_load(&cursor->mapHDRtoSDR));
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egl_uniform1f (t->uMapHDRGain ,
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atomic_load(&cursor->mapHDRGain));
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egl_uniform1f (t->uMapHDRContentPeak ,
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atomic_load(&cursor->mapHDRContentPeak));
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egl_uniform1ui(t->uColorTransformFlags ,
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mono ? 0 : cursor->activeColorTransform.flags);
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egl_uniformSet (t->uColorMatrix , EGL_UNIFORM_TYPE_4FV, 3, GL_FALSE,
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cursor->activeColorTransform.matrix);
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egl_uniform1f (t->uColorScalar ,
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cursor->activeColorTransform.scalar);
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egl_uniform1i (t->uLinearComposition ,
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!mono && linearComposition);
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if (!mono && cursor->colorLUT)
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egl_stateBindTexture(1, GL_TEXTURE_2D, cursor->colorLUT);
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}
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static void cursorTexFree(struct CursorTex * t)
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{
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egl_textureFree(&t->texture);
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egl_shaderFree (&t->shader );
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};
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bool egl_cursorInit(EGL_Cursor ** cursor)
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{
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*cursor = malloc(sizeof(**cursor));
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if (!*cursor)
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{
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DEBUG_ERROR("Failed to malloc EGL_Cursor");
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return false;
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}
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memset(*cursor, 0, sizeof(**cursor));
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LG_LOCK_INIT((*cursor)->lock);
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if (!cursorTexInit(&(*cursor)->norm,
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b_shader_cursor_vert , b_shader_cursor_vert_size,
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b_shader_cursor_rgb_frag, b_shader_cursor_rgb_frag_size))
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return false;
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if (!cursorTexInit(&(*cursor)->mono,
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b_shader_cursor_vert , b_shader_cursor_vert_size,
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b_shader_cursor_mono_frag, b_shader_cursor_mono_frag_size))
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return false;
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if (!egl_modelInit(&(*cursor)->model))
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{
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DEBUG_ERROR("Failed to initialize the cursor model");
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return false;
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}
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egl_modelSetDefault((*cursor)->model, true);
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(*cursor)->cbMode = option_get_int("egl", "cbMode");
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struct CursorPos pos = { .x = 0, .y = 0 };
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struct CursorPos hs = { .x = 0, .y = 0 };
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struct CursorSize size = { .w = 0, .h = 0 };
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atomic_init(&(*cursor)->pos , pos );
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atomic_init(&(*cursor)->hs , hs );
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atomic_init(&(*cursor)->size , size );
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atomic_init(&(*cursor)->scale , 1.0f );
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atomic_init(&(*cursor)->sourceTransfer , CURSOR_TRANSFER_SRGB);
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atomic_init(&(*cursor)->sdrWhiteLevel ,
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KVMFR_SDR_WHITE_LEVEL_DEFAULT);
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atomic_init(&(*cursor)->mapHDRtoSDR , false);
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atomic_init(&(*cursor)->mapHDRGain , 1.0f );
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atomic_init(&(*cursor)->mapHDRContentPeak, 1.0f );
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return true;
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}
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void egl_cursorFree(EGL_Cursor ** cursor)
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{
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if (!*cursor)
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return;
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LG_LOCK_FREE((*cursor)->lock);
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if ((*cursor)->data)
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free((*cursor)->data);
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cursorTexFree(&(*cursor)->norm);
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cursorTexFree(&(*cursor)->mono);
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if ((*cursor)->colorLUT)
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glDeleteTextures(1, &(*cursor)->colorLUT);
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egl_modelFree(&(*cursor)->model);
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free(*cursor);
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*cursor = NULL;
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}
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bool egl_cursorSetShape(EGL_Cursor * cursor, const LG_RendererCursor type,
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const int width, const int height, const int stride, const uint8_t * data)
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{
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LG_LOCK(cursor->lock);
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cursor->type = type;
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cursor->width = width;
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cursor->height = (type == LG_CURSOR_MONOCHROME ? height / 2 : height);
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cursor->stride = stride;
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const size_t size = height * stride;
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if (size > cursor->dataSize)
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{
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if (cursor->data)
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free(cursor->data);
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cursor->data = malloc(size);
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if (!cursor->data)
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{
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DEBUG_ERROR("Failed to malloc buffer for cursor shape");
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LG_UNLOCK(cursor->lock);
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return false;
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}
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cursor->dataSize = size;
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}
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memcpy(cursor->data, data, size);
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cursor->update = true;
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LG_UNLOCK(cursor->lock);
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return true;
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}
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void egl_cursorSetColorTransform(EGL_Cursor * cursor,
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const KVMFRColorTransform * transform)
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{
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LG_LOCK(cursor->lock);
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cursor->pendingColorTransform = *transform;
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cursor->colorTransformUpdate = true;
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LG_UNLOCK(cursor->lock);
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}
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void egl_cursorSetSize(EGL_Cursor * cursor, const float w, const float h)
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{
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struct CursorSize size = { .w = w, .h = h };
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atomic_store(&cursor->size, size);
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}
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void egl_cursorSetScale(EGL_Cursor * cursor, const float scale)
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{
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atomic_store(&cursor->scale, scale);
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}
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void egl_cursorSetState(EGL_Cursor * cursor, const bool visible,
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const float x, const float y, const float hx, const float hy)
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{
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cursor->visible = visible;
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struct CursorPos pos = { .x = x , .y = y };
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struct CursorPos hs = { .x = hx, .y = hy };
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atomic_store(&cursor->pos, pos);
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atomic_store(&cursor->hs , hs);
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}
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struct CursorState egl_cursorRender(EGL_Cursor * cursor,
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LG_RendererRotate rotate, int width, int height,
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bool linearComposition, bool * logicalDeferred)
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{
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if (logicalDeferred)
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*logicalDeferred = false;
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if (!cursor->visible)
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return (struct CursorState) { .visible = false };
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if (cursor->update || cursor->colorTransformUpdate)
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{
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LG_LOCK(cursor->lock);
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const bool updateShape = cursor->update;
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cursor->update = false;
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if (cursor->colorTransformUpdate)
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{
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cursor->activeColorTransform = cursor->pendingColorTransform;
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cursor->colorTransformUpdate = false;
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if (cursor->activeColorTransform.flags & KVMFR_COLOR_TRANSFORM_LUT)
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{
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if (!cursor->colorLUT)
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glGenTextures(1, &cursor->colorLUT);
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egl_stateBindTexture(1, GL_TEXTURE_2D, cursor->colorLUT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, 4096, 1, 0,
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GL_RGBA, GL_FLOAT, cursor->activeColorTransform.lut);
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}
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}
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if (updateShape)
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{
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uint8_t * data = cursor->data;
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switch(cursor->type)
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{
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case LG_CURSOR_MASKED_COLOR:
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{
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uint32_t xor[cursor->height][cursor->width];
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for(int y = 0; y < cursor->height; ++y)
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for(int x = 0; x < cursor->width; ++x)
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{
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uint32_t * src = (uint32_t *)(data + (cursor->stride * y) + x * 4);
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const bool masked = (*src & 0xFF000000) != 0;
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if (masked)
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*src = xor[y][x] = *src & 0x00FFFFFF;
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else
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{
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xor[y][x] = 0xFF000000;
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*src |= 0xFF000000;
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}
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}
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egl_textureSetup(cursor->mono.texture, EGL_PF_BGRA,
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cursor->width, cursor->height, cursor->width, sizeof(xor[0]));
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egl_textureUpdate(cursor->mono.texture, (uint8_t *)xor, true);
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}
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// fall through
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case LG_CURSOR_COLOR:
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{
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egl_textureSetup(cursor->norm.texture, EGL_PF_BGRA,
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cursor->width, cursor->height, cursor->width, cursor->stride);
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egl_textureUpdate(cursor->norm.texture, data, true);
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break;
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}
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case LG_CURSOR_MONOCHROME:
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{
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uint32_t and[cursor->height][cursor->width];
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uint32_t xor[cursor->height][cursor->width];
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for(int y = 0; y < cursor->height; ++y)
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{
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for(int x = 0; x < cursor->width; ++x)
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{
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const uint8_t * srcAnd = data + (cursor->stride * y) + (x / 8);
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const uint8_t * srcXor = srcAnd + cursor->stride * cursor->height;
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const uint8_t mask = 0x80 >> (x % 8);
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const uint32_t andMask = (*srcAnd & mask) ? 0xFFFFFFFF : 0xFF000000;
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const uint32_t xorMask = (*srcXor & mask) ? 0x00FFFFFF : 0x00000000;
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and[y][x] = andMask;
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xor[y][x] = xorMask;
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}
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}
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// Monochrome cursors use AND/XOR mask textures - never convert to PQ
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egl_textureSetup(cursor->norm.texture, EGL_PF_BGRA,
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cursor->width, cursor->height, cursor->width, sizeof(and[0]));
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egl_textureSetup(cursor->mono.texture, EGL_PF_BGRA,
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cursor->width, cursor->height, cursor->width, sizeof(xor[0]));
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egl_textureUpdate(cursor->norm.texture, (uint8_t *)and, true);
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egl_textureUpdate(cursor->mono.texture, (uint8_t *)xor, true);
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break;
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}
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}
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}
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LG_UNLOCK(cursor->lock);
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}
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cursor->rotate = rotate;
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struct CursorPos pos = atomic_load(&cursor->pos );
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float scale = atomic_load(&cursor->scale);
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struct CursorPos hs = atomic_load(&cursor->hs );
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struct CursorSize size = atomic_load(&cursor->size );
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pos.x -= hs.x * scale;
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pos.y -= hs.y * scale;
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size.w *= scale;
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size.h *= scale;
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struct CursorState state = {
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.visible = true,
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};
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switch (rotate)
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{
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case LG_ROTATE_0:
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state.rect.x = (pos.x * width + width) / 2;
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state.rect.y = (-pos.y * height + height) / 2 - size.h * height;
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state.rect.w = size.w * width + 3;
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state.rect.h = size.h * height + 3;
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break;
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case LG_ROTATE_90:
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state.rect.x = (-pos.y * width + width) / 2 - size.h * width;
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state.rect.y = (-pos.x * height + height) / 2 - size.w * height;
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state.rect.w = size.h * width + 3;
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state.rect.h = size.w * height + 3;
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break;
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case LG_ROTATE_180:
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state.rect.x = (-pos.x * width + width) / 2 - size.w * width;
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state.rect.y = (pos.y * height + height) / 2;
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state.rect.w = size.w * width + 3;
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state.rect.h = size.h * height + 3;
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break;
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|
case LG_ROTATE_270:
|
|
state.rect.x = (pos.y * width + width) / 2;
|
|
state.rect.y = (pos.x * height + height) / 2;
|
|
state.rect.w = size.h * width + 3;
|
|
state.rect.h = size.w * height + 3;
|
|
break;
|
|
|
|
default:
|
|
DEBUG_UNREACHABLE();
|
|
}
|
|
|
|
state.rect.x = max(0, state.rect.x - 1);
|
|
state.rect.y = max(0, state.rect.y - 1);
|
|
|
|
if (linearComposition && cursor->type != LG_CURSOR_COLOR)
|
|
{
|
|
if (logicalDeferred)
|
|
*logicalDeferred = true;
|
|
return state;
|
|
}
|
|
|
|
egl_stateBlend(true);
|
|
switch(cursor->type)
|
|
{
|
|
case LG_CURSOR_MONOCHROME:
|
|
{
|
|
setCursorTexUniforms(cursor, &cursor->norm, true, pos.x, pos.y,
|
|
size.w, size.h, scale, false);
|
|
egl_shaderUse(cursor->norm.shader);
|
|
egl_stateBlendFunc(GL_ZERO, GL_SRC_COLOR);
|
|
egl_modelSetTexture(cursor->model, cursor->norm.texture);
|
|
egl_modelRender(cursor->model);
|
|
|
|
setCursorTexUniforms(cursor, &cursor->mono, true, pos.x, pos.y,
|
|
size.w, size.h, scale, false);
|
|
egl_shaderUse(cursor->mono.shader);
|
|
egl_stateBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ZERO);
|
|
egl_modelSetTexture(cursor->model, cursor->mono.texture);
|
|
egl_modelRender(cursor->model);
|
|
break;
|
|
}
|
|
|
|
case LG_CURSOR_MASKED_COLOR:
|
|
{
|
|
setCursorTexUniforms(cursor, &cursor->norm, false, pos.x, pos.y,
|
|
size.w, size.h, scale, linearComposition);
|
|
egl_shaderUse(cursor->norm.shader);
|
|
egl_stateBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
egl_modelSetTexture(cursor->model, cursor->norm.texture);
|
|
egl_modelRender(cursor->model);
|
|
|
|
setCursorTexUniforms(cursor, &cursor->mono, false, pos.x, pos.y,
|
|
size.w, size.h, scale, linearComposition);
|
|
egl_shaderUse(cursor->mono.shader);
|
|
egl_stateBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ZERO);
|
|
egl_modelSetTexture(cursor->model, cursor->mono.texture);
|
|
egl_modelRender(cursor->model);
|
|
break;
|
|
}
|
|
|
|
case LG_CURSOR_COLOR:
|
|
{
|
|
setCursorTexUniforms(cursor, &cursor->norm, false, pos.x, pos.y,
|
|
size.w, size.h, scale, linearComposition);
|
|
egl_shaderUse(cursor->norm.shader);
|
|
egl_stateBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
|
|
egl_modelSetTexture(cursor->model, cursor->norm.texture);
|
|
egl_modelRender(cursor->model);
|
|
break;
|
|
}
|
|
}
|
|
egl_stateBlend(false);
|
|
|
|
return state;
|
|
}
|
|
|
|
void egl_cursorSetHDRState(EGL_Cursor * cursor, bool sourceHDR,
|
|
bool nativeHDR, bool mapHDRtoSDR, bool hdrPQ,
|
|
float mapGain, float mapContentPeak)
|
|
{
|
|
// The cursor's white level is supplied independently by the pointer queue.
|
|
// Do not replace it with the frame-level fallback during every render.
|
|
atomic_store(&cursor->sourceTransfer,
|
|
!sourceHDR ? CURSOR_TRANSFER_SRGB :
|
|
(hdrPQ ? CURSOR_TRANSFER_PQ : CURSOR_TRANSFER_SCRGB));
|
|
atomic_store(&cursor->mapHDRtoSDR,
|
|
sourceHDR && !nativeHDR && mapHDRtoSDR);
|
|
atomic_store(&cursor->mapHDRGain, mapGain);
|
|
atomic_store(&cursor->mapHDRContentPeak, mapContentPeak);
|
|
}
|
|
|
|
void egl_cursorSetSDRWhiteLevel(EGL_Cursor * cursor, float sdrWhiteLevel)
|
|
{
|
|
atomic_store(&cursor->sdrWhiteLevel, sdrWhiteLevel > 0.0f ?
|
|
sdrWhiteLevel : KVMFR_SDR_WHITE_LEVEL_DEFAULT);
|
|
}
|