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fix gles border on nvidia proprietary driver by forcing high prec #177

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fix gles border on nvidia proprietary driver by forcing high prec #177

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4 changes: 4 additions & 0 deletions meson.build
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Original file line number Diff line number Diff line change
Expand Up @@ -149,6 +149,10 @@ if get_option('tracy_enable')
)
endif

if get_option('force_fragment_shader_precision_high')
add_project_arguments('-DFORCE_GL_FRAGMENT_PRECISION_HIGH=1', language: 'c')
endif

subdir('protocol')
subdir('render')

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1 change: 1 addition & 0 deletions meson_options.txt
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@@ -1,3 +1,4 @@
option('examples', type: 'boolean', value: true, description: 'Build example applications')
option('renderers', type: 'array', choices: ['auto', 'gles2'], value: ['auto'], description: 'Select built-in renderers')
option('tracy_enable', type: 'boolean', value: false, description: 'Enable profiling')
option( 'force_fragment_shader_precision_high', type: 'boolean', value: false)
4 changes: 4 additions & 0 deletions render/egl.c
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Expand Up @@ -412,7 +412,11 @@ static bool egl_init(struct wlr_egl *egl, EGLenum platform,
EGLint attribs[7];

attribs[atti++] = EGL_CONTEXT_CLIENT_VERSION;
#ifdef FORCE_GL_FRAGMENT_PRECISION_HIGH
attribs[atti++] = 3;
#else
attribs[atti++] = 2;
#endif

// Request a high priority context if possible
// TODO: only do this if we're running as the DRM master
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15 changes: 14 additions & 1 deletion render/fx_renderer/shaders.c
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Expand Up @@ -23,7 +23,20 @@

GLuint compile_shader(GLuint type, const GLchar *src) {
GLuint shader = glCreateShader(type);
glShaderSource(shader, 1, &src, NULL);

const char *prefix = "";
#ifdef FORCE_GL_FRAGMENT_PRECISION_HIGH
if (type == GL_FRAGMENT_SHADER) {
prefix =
"#ifndef GL_FRAGMENT_PRECISION_HIGH\n"
"#define GL_FRAGMENT_PRECISION_HIGH 1\n"
"#endif\n";
}
#endif

const GLchar *sources[] = { prefix, src };

glShaderSource(shader, 2, sources, NULL);
glCompileShader(shader);

GLint ok;
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