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Don't blur behind opaque pixels

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This commit is contained in:
vaxerski
2022-04-17 13:15:56 +02:00
parent 74dbf196c1
commit 748a787ba2
4 changed files with 40 additions and 11 deletions
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19
src/render/OpenGL.cpp
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@@ -37,6 +37,7 @@ CHyprOpenGLImpl::CHyprOpenGLImpl() {
m_shRGBA.alpha = glGetUniformLocation(prog, "alpha");
m_shRGBA.texAttrib = glGetAttribLocation(prog, "texcoord");
m_shRGBA.posAttrib = glGetAttribLocation(prog, "pos");
m_shRGBA.discardOpaque = glGetUniformLocation(prog, "discardOpaque");
prog = createProgram(TEXVERTSRC, TEXFRAGSRCRGBX);
m_shRGBX.program = prog;
@@ -45,6 +46,7 @@ CHyprOpenGLImpl::CHyprOpenGLImpl() {
m_shRGBX.alpha = glGetUniformLocation(prog, "alpha");
m_shRGBX.texAttrib = glGetAttribLocation(prog, "texcoord");
m_shRGBX.posAttrib = glGetAttribLocation(prog, "pos");
m_shRGBX.discardOpaque = glGetUniformLocation(prog, "discardOpaque");
prog = createProgram(TEXVERTSRC, TEXFRAGSRCEXT);
m_shEXT.program = prog;
@@ -53,6 +55,7 @@ CHyprOpenGLImpl::CHyprOpenGLImpl() {
m_shEXT.alpha = glGetUniformLocation(prog, "alpha");
m_shEXT.posAttrib = glGetAttribLocation(prog, "pos");
m_shEXT.texAttrib = glGetAttribLocation(prog, "texcoord");
m_shEXT.discardOpaque = glGetUniformLocation(prog, "discardOpaque");
prog = createProgram(TEXVERTSRC, FRAGBLUR1);
m_shBLUR1.program = prog;
@@ -263,7 +266,7 @@ void CHyprOpenGLImpl::renderTexture(const CTexture& tex, wlr_box* pBox, float al
scissor((wlr_box*)nullptr);
}
void CHyprOpenGLImpl::renderTextureInternal(const CTexture& tex, wlr_box* pBox, float alpha, int round) {
void CHyprOpenGLImpl::renderTextureInternal(const CTexture& tex, wlr_box* pBox, float alpha, int round, bool discardOpaque) {
RASSERT(m_RenderData.pMonitor, "Tried to render texture without begin()!");
RASSERT((tex.m_iTexID > 0), "Attempted to draw NULL texture!");
@@ -306,6 +309,7 @@ void CHyprOpenGLImpl::renderTextureInternal(const CTexture& tex, wlr_box* pBox,
glUniformMatrix3fv(shader->proj, 1, GL_FALSE, glMatrix);
glUniform1i(shader->tex, 0);
glUniform1f(shader->alpha, alpha / 255.f);
glUniform1i(shader->discardOpaque, (int)discardOpaque);
// round is in px
// so we need to do some maf
@@ -383,8 +387,8 @@ void CHyprOpenGLImpl::renderTextureWithBlurInternal(const CTexture& tex, wlr_box
glStencilFunc(GL_ALWAYS, 1, -1);
glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
// render our window to the mirror FB while also writing to the stencil
renderTextureInternal(tex, pBox, a, round);
// render our window to the mirror FB while also writing to the stencil, discard opaque pixels
renderTextureInternal(tex, pBox, a, round, true);
// then we disable writing to the mask and ONLY accept writing within the stencil
glStencilFunc(GL_EQUAL, 1, -1);
@@ -446,14 +450,13 @@ void CHyprOpenGLImpl::renderTextureWithBlurInternal(const CTexture& tex, wlr_box
glBindTexture(tex.m_iTarget, 0);
// when the blur is done, let's render the window itself
// we get it from the mirrored FB full because it's the FB 255 alpha cuz we rendered with a before, same for rounding
renderTextureInternal(m_mMonitorRenderResources[m_RenderData.pMonitor].mirrorFB.m_cTex, &fullMonBox, 255.f, 0);
// and disable the stencil
// disable the stencil
glStencilMask(-1);
glStencilFunc(GL_ALWAYS, 1, 0xFF);
glDisable(GL_STENCIL_TEST);
// when the blur is done, let's render the window itself. We can't use mirror because it had discardOpaque
renderTextureInternal(tex, pBox, a, round);
}
void pushVert2D(float x, float y, float* arr, int& counter, wlr_box* box) {