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LibGL: Implement glIsTexture

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Required by Xash3D for the r_showtextures command, where it shows every
allocated texture on screen.

Description of glIsTexture from the spec:
"glIsTexture returns GL_TRUE if texture is currently the name of a
texture. If texture is zero, or is a non-zero value that is not
currently the name of a texture, or if an error occurs, glIsTexture
returns GL_FALSE.

A name returned by glGenTextures, but not yet associated with a texture
by calling glBindTexture, is not the name of a texture."

https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/glIsTexture.xhtml
This commit is contained in:
Luke Wilde 2022-01-13 06:02:33 +00:00 • committed by Andreas Kling
parent adfb0846d2
commit 1fc611877f
5 changed files with 22 additions and 0 deletions
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14
Userland/Libraries/LibGL/SoftwareGLContext.cpp
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@ -1801,6 +1801,20 @@ void SoftwareGLContext::gl_bind_texture(GLenum target, GLuint texture)
m_sampler_config_is_dirty = true;
}
GLboolean SoftwareGLContext::gl_is_texture(GLuint texture)
{
RETURN_VALUE_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION, GL_FALSE);
if (texture == 0)
return GL_FALSE;
auto it = m_allocated_textures.find(texture);
if (it == m_allocated_textures.end())
return GL_FALSE;
return it->value.is_null() ? GL_FALSE : GL_TRUE;
}
void SoftwareGLContext::gl_active_texture(GLenum texture)
{
RETURN_WITH_ERROR_IF(texture < GL_TEXTURE0 || texture > GL_TEXTURE31, GL_INVALID_ENUM);