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Vertex shaders can write to gl_PointSize (fixes #1603).

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If a shader uses gl_PointSize then it can only be used when drawing points. If a shader doesn't use gl_PointSize then it can't be used when drawing points.

Added 'ConstantPointSize' and 'CurrentDPIScale' built-in shader uniforms.

ConstantPointSize is in DPI-scaled points, whereas gl_PointSize is in pixels, so to get the correct default behaviour a shader needs to do gl_PointSize = ConstantPointSize * CurrentDPIScale
This commit is contained in:
Alex Szpakowski
2021-01-23 13:47:12 -04:00
parent deff795908
commit 694d448e83
13 changed files with 83 additions and 87 deletions
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src/modules/graphics/Mesh.cpp
+2 -2
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@@ -519,8 +519,8 @@ void Mesh::drawInstanced(Graphics *gfx, const Matrix4 &m, int instancecount)
if (Shader::isDefaultActive())
Shader::attachDefault(Shader::STANDARD_DEFAULT);
if (Shader::current && texture.get())
Shader::current->checkMainTexture(texture);
if (Shader::current)
Shader::current->validateDrawState(primitiveType, texture);
VertexAttributes attributes;
BufferBindings buffers;