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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/SpriteBatch.cpp
+3 -3
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@@ -329,11 +329,11 @@ void SpriteBatch::draw(Graphics *gfx, const Matrix4 &m)
Shader::attachDefault(defaultshader);
}
if (Shader::current)
Shader::current->checkMainTexture(texture);
}
if (Shader::current)
Shader::current->validateDrawState(PRIMITIVE_TRIANGLES, texture);
flush(); // Upload any modified sprite data to the GPU.
VertexAttributes attributes;