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Add new wrap mode "clampone". Pixels sampled outside of [0, 1] are white (1, 1, 1, 1).

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--HG--
branch : minor
This commit is contained in:
Alex Szpakowski
2019-12-27 13:57:20 -05:00
parent 76121ec152
commit 361cefbb05
7 changed files with 35 additions and 14 deletions
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src/modules/graphics/opengl/Canvas.cpp
+4 -4
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@@ -357,11 +357,11 @@ bool Canvas::setWrap(const Texture::Wrap &w)
wrap.s = wrap.t = wrap.r = WRAP_CLAMP;
}
if (!gl.isClampZeroTextureWrapSupported())
if (!gl.isClampZeroOneTextureWrapSupported())
{
if (wrap.s == WRAP_CLAMP_ZERO) wrap.s = WRAP_CLAMP;
if (wrap.t == WRAP_CLAMP_ZERO) wrap.t = WRAP_CLAMP;
if (wrap.r == WRAP_CLAMP_ZERO) wrap.r = WRAP_CLAMP;
if (isClampZeroOrOne(wrap.s)) wrap.s = WRAP_CLAMP;
if (isClampZeroOrOne(wrap.t)) wrap.t = WRAP_CLAMP;
if (isClampZeroOrOne(wrap.r)) wrap.r = WRAP_CLAMP;
}
gl.bindTextureToUnit(this, 0, false);
src/modules/graphics/opengl/Graphics.cpp
+1 -1
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@@ -1363,7 +1363,7 @@ void Graphics::getAPIStats(int &shaderswitches) const
void Graphics::initCapabilities()
{
capabilities.features[FEATURE_MULTI_CANVAS_FORMATS] = Canvas::isMultiFormatMultiCanvasSupported();
capabilities.features[FEATURE_CLAMP_ZERO] = gl.isClampZeroTextureWrapSupported();
capabilities.features[FEATURE_CLAMP_ZERO] = gl.isClampZeroOneTextureWrapSupported();
capabilities.features[FEATURE_BLENDMINMAX] = GLAD_VERSION_1_4 || GLAD_ES_VERSION_3_0 || GLAD_EXT_blend_minmax;
capabilities.features[FEATURE_LIGHTEN] = capabilities.features[FEATURE_BLENDMINMAX];
capabilities.features[FEATURE_FULL_NPOT] = GLAD_VERSION_2_0 || GLAD_ES_VERSION_3_0 || GLAD_OES_texture_npot;
src/modules/graphics/opengl/Image.cpp
+4 -4
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@@ -316,11 +316,11 @@ bool Image::setWrap(const Texture::Wrap &w)
wrap.s = wrap.t = wrap.r = WRAP_CLAMP;
}
if (!gl.isClampZeroTextureWrapSupported())
if (!gl.isClampZeroOneTextureWrapSupported())
{
if (wrap.s == WRAP_CLAMP_ZERO) wrap.s = WRAP_CLAMP;
if (wrap.t == WRAP_CLAMP_ZERO) wrap.t = WRAP_CLAMP;
if (wrap.r == WRAP_CLAMP_ZERO) wrap.r = WRAP_CLAMP;
if (isClampZeroOrOne(wrap.s)) wrap.s = WRAP_CLAMP;
if (isClampZeroOrOne(wrap.t)) wrap.t = WRAP_CLAMP;
if (isClampZeroOrOne(wrap.r)) wrap.r = WRAP_CLAMP;
}
gl.bindTextureToUnit(this, 0, false);
src/modules/graphics/opengl/OpenGL.cpp
+21 -4
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@@ -1061,6 +1061,7 @@ GLint OpenGL::getGLWrapMode(Texture::WrapMode wmode)
default:
return GL_CLAMP_TO_EDGE;
case Texture::WRAP_CLAMP_ZERO:
case Texture::WRAP_CLAMP_ONE:
return GL_CLAMP_TO_BORDER;
case Texture::WRAP_REPEAT:
return GL_REPEAT;
@@ -1094,13 +1095,29 @@ GLint OpenGL::getGLCompareMode(CompareMode mode)
}
}
static bool isClampOne(Texture::WrapMode mode)
{
return mode == Texture::WRAP_CLAMP_ONE;
}
void OpenGL::setTextureWrap(TextureType target, const graphics::Texture::Wrap &w)
{
glTexParameteri(getGLTextureType(target), GL_TEXTURE_WRAP_S, getGLWrapMode(w.s));
glTexParameteri(getGLTextureType(target), GL_TEXTURE_WRAP_T, getGLWrapMode(w.t));
GLenum textype = getGLTextureType(target);
if (Texture::isClampZeroOrOne(w.s) || Texture::isClampZeroOrOne(w.t) || Texture::isClampZeroOrOne(w.r))
{
GLfloat c[] = {0.0f, 0.0f, 0.0f, 0.0f};
if (isClampOne(w.s) || isClampOne(w.t) || isClampOne(w.r))
c[0] = c[1] = c[2] = c[3] = 1.0f;
glTexParameterfv(textype, GL_TEXTURE_BORDER_COLOR, c);
}
glTexParameteri(textype, GL_TEXTURE_WRAP_S, getGLWrapMode(w.s));
glTexParameteri(textype, GL_TEXTURE_WRAP_T, getGLWrapMode(w.t));
if (target == TEXTURE_VOLUME)
glTexParameteri(getGLTextureType(target), GL_TEXTURE_WRAP_R, getGLWrapMode(w.r));
glTexParameteri(textype, GL_TEXTURE_WRAP_R, getGLWrapMode(w.r));
}
bool OpenGL::rawTexStorage(TextureType target, int levels, PixelFormat pixelformat, bool &isSRGB, int width, int height, int depth)
@@ -1202,7 +1219,7 @@ bool OpenGL::isTextureTypeSupported(TextureType type) const
}
}
bool OpenGL::isClampZeroTextureWrapSupported() const
bool OpenGL::isClampZeroOneTextureWrapSupported() const
{
return GLAD_VERSION_1_3 || GLAD_EXT_texture_border_clamp || GLAD_NV_texture_border_clamp;
}
src/modules/graphics/opengl/OpenGL.h
+1 -1
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@@ -348,7 +348,7 @@ public:
bool rawTexStorage(TextureType target, int levels, PixelFormat pixelformat, bool &isSRGB, int width, int height, int depth = 1);
bool isTextureTypeSupported(TextureType type) const;
bool isClampZeroTextureWrapSupported() const;
bool isClampZeroOneTextureWrapSupported() const;
bool isPixelShaderHighpSupported() const;
bool isInstancingSupported() const;
bool isDepthCompareSampleSupported() const;