swung0x48/MobileGL
1
0
Fork 0
mirror of https://github.com/MobileGL-Dev/MobileGL synced 2026-09-08 04:08:32 +09:00
Code Issues Packages Projects Releases Wiki Activity

[Fix, Test] (GLImpl, MG_Test): validate glBlitFramebuffer's mask bits, filter enum and LINEAR depth rule

Browse Source
This commit is contained in:
swung0x48
2026-08-20 05:14:11 -04:00
parent 1e8d4661e6
commit 7940a09491
2 changed files with 88 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
MobileGL/MG_Impl/GLImpl/Framebuffer/GL_Framebuffer.cpp
+40
View File
@@ -3153,15 +3153,55 @@ namespace MobileGL::MG_Impl::GLImpl {
GetNamedFramebufferAttachmentParameteriv_State(framebuffer, attachment, pname, params);
}
// The three argument errors GL 4.6 core 18.3.1 asks a blit for. They have to be raised here,
// in the backend-independent frontend: DirectGLES drains the driver's error queue around the
// blit on purpose (that is how the resolve fallback probes the driver), so an ES-side
// rejection never reaches the application and glGetError() answered GL_NO_ERROR for a call
// the spec requires to fail (KHR-GL30.api.coverage's glBlitFramebuffer sub-check). DirectVulkan
// already dropped the bad-filter and LINEAR-with-depth/stencil calls on the floor with a log
// line (VulkanRenderer::BlitFramebuffer), so the only thing that changes for it is that the
// error is now visible where the spec says it should be.
static Bool ValidateBlitMaskAndFilter(const char* functionName, GLbitfield mask, GLenum filter) {
constexpr GLbitfield kBlitMaskBits = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;
if ((mask & ~kBlitMaskBits) != 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidValue,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", functionName,
"mask contains bits other than GL_COLOR_BUFFER_BIT, "
"GL_DEPTH_BUFFER_BIT and GL_STENCIL_BUFFER_BIT."));
return false;
}
if (filter != GL_NEAREST && filter != GL_LINEAR) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidEnum,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", functionName,
"filter must be GL_NEAREST or GL_LINEAR."));
return false;
}
// Depth and stencil have no meaningful interpolation, so GL_LINEAR is rejected outright
// rather than downgraded - even when the mask also carries the colour bit.
if (filter == GL_LINEAR && (mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)) != 0) {
MG_State::pGLContext->RecordError(
ErrorCode::InvalidOperation,
MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", functionName,
"GL_LINEAR filtering is not allowed when mask includes "
"GL_DEPTH_BUFFER_BIT or GL_STENCIL_BUFFER_BIT."));
return false;
}
return true;
}
void BlitNamedFramebuffer(GLuint readFramebuffer, GLuint drawFramebuffer, GLint srcX0, GLint srcY0, GLint srcX1,
GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask,
GLenum filter) {
if (!ValidateBlitMaskAndFilter(__func__, mask, filter)) return;
BlitNamedFramebuffer_State(readFramebuffer, drawFramebuffer, srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1,
dstY1, mask, filter);
}
void BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1,
GLint dstY1, GLbitfield mask, GLenum filter) {
if (!ValidateBlitMaskAndFilter(__func__, mask, filter)) return;
BlitFramebuffer_Backend(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
}