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Check if GLES2 Devices Support Mipmapping #1408

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Merged
complexlogic merged 1 commit into from
Aug 23, 2026
Merged

Check if GLES2 Devices Support Mipmapping #1408

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12 changes: 12 additions & 0 deletions src/base/URenderer_OpenGL.pas
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,7 @@ TRenderer_OpenGLBase = class(TRenderer)
SupportsVAO: boolean;
SupportsFBO: boolean;
SupportsMappedBuffer: boolean;
SupportsMipMap: boolean;
GlyphTextureFormat: GLint;

MappedBuffer: PGLfloat; // OpenGL 2.0 doesn't support mapped buffers, so we manage it ourself.
Expand Down Expand Up @@ -1522,6 +1523,8 @@ function TRenderer_OpenGLBase.GetBlend(): boolean;

function TRenderer_OpenGLBase.LoadTexture(Data: PByte; W, H: integer; const Identifier: IPath; Typ: TTextureType; UseMipmaps: boolean): TTexture;
begin
if (UseMipmaps and (not SupportsMipMap)) then
UseMipmaps := false;
if (Typ = TEXTURE_TYPE_TRANSPARENT) or (Typ = TEXTURE_TYPE_COLORIZED) then
Result := TTexture_OpenGL.Create(Data, W, H, Identifier, GL_RGBA, 4, GL_CLAMP_TO_EDGE, UseMipmaps)
else // TEXTURE_TYPE_PLAIN
Expand Down Expand Up @@ -1780,6 +1783,7 @@ procedure TRenderer_OpenGL3.CheckVersion();
SupportsVAO := true;
SupportsFBO := true;
SupportsMappedBuffer := true;
SupportsMipMap := true;
GlyphTextureFormat := GL_RED;
if ((MajorVersion > 3) or ((MajorVersion = 3) and (MinorVersion >= 3))) then
fSupportsProjectM := true;
Expand Down Expand Up @@ -1833,6 +1837,7 @@ procedure TRenderer_OpenGLES.CheckVersion();
GL_OES_vertex_array_object: boolean;
GL_OES_element_index_uint: boolean;
GL_EXT_texture_rg: boolean;
GL_OES_texture_npot: boolean;
begin
if (MajorVersion < 2) then
raise Exception.Create('Could not initialize OpenGL ES 2.0 or later');
Expand All @@ -1842,6 +1847,7 @@ procedure TRenderer_OpenGLES.CheckVersion();
SupportsVAO := true;
fSupportsProjectM := true;
SupportsMappedBuffer := true;
SupportsMipMap := true;
GlyphTextureFormat := GL_RED;
end
else
Expand All @@ -1858,6 +1864,11 @@ procedure TRenderer_OpenGLES.CheckVersion();
GlyphTextureFormat := GL_RED
else
GlyphTextureFormat := GL_LUMINANCE;
GL_OES_texture_npot := Int_CheckExtension(Extensions, 'GL_OES_texture_npot');
if (GL_OES_texture_npot) then
SupportsMipMap := true
else
Log.LogInfo('OpenGL ES driver does not support mipmapping for NPOT textures. Mipmapping will be disabled', 'TRenderer_OpenGLES.CheckVersion');
end;
SupportsFBO := true;
end;
Expand Down Expand Up @@ -1908,6 +1919,7 @@ procedure TRenderer_OpenGL2.CheckVersion();
GL_ARB_map_buffer_range := Int_CheckExtension(Extensions, 'GL_ARB_map_buffer_range');
if (GL_ARB_map_buffer_range) then
SupportsMappedBuffer := true;
SupportsMipMap := true;
fSupportsProjectM := false;
SupportsFBO := false;
GlyphTextureFormat := GL_LUMINANCE;
Expand Down
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