[Mesa-dev] [PATCH 1/5] mesa: Add skeleton implementation of glGetInternalformativ
Ian Romanick
idr at freedesktop.org
Fri Jan 4 17:43:40 PST 2013
From: Ian Romanick <ian.d.romanick at intel.com>
This is for the GL_ARB_internalformat_query extension and GLES 3.0.
v2: Generate GL_INVALID_OPERATION if the extension is not supported.
Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
Reviewed-by: Eric Anholt <eric at anholt.net>
---
src/mesa/main/formatquery.c | 124 ++++++++++++++++++++++++++++++++++++++++++++
src/mesa/main/formatquery.h | 35 +++++++++++++
src/mesa/sources.mak | 1 +
3 files changed, 160 insertions(+)
create mode 100644 src/mesa/main/formatquery.c
create mode 100644 src/mesa/main/formatquery.h
diff --git a/src/mesa/main/formatquery.c b/src/mesa/main/formatquery.c
new file mode 100644
index 0000000..64f10cd
--- /dev/null
+++ b/src/mesa/main/formatquery.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "mtypes.h"
+#include "glformats.h"
+#include "macros.h"
+#include "mfeatures.h"
+#include "enums.h"
+#include "fbobject.h"
+#include "formatquery.h"
+
+void GLAPIENTRY
+_mesa_GetInternalformativ(GLenum target, GLenum internalformat, GLenum pname,
+ GLsizei bufSize, GLint *params)
+{
+ GLint buffer[16];
+ GLsizei count = 0;
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (!ctx->Extensions.ARB_internalformat_query) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glGetInternalformativ");
+ return;
+ }
+
+ /* The ARB_internalformat_query spec says:
+ *
+ * "If the <target> parameter to GetInternalformativ is not one of
+ * TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY or RENDERBUFFER
+ * then an INVALID_ENUM error is generated."
+ */
+ switch (target) {
+ case GL_RENDERBUFFER:
+ break;
+
+ case GL_TEXTURE_2D_MULTISAMPLE:
+ case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
+ /* Mesa does not currently support GL_ARB_texture_multisample, so these
+ * enums are not valid on this implementation either.
+ */
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetInternalformativ(target=%s)",
+ _mesa_lookup_enum_by_nr(target));
+ return;
+ }
+
+ /* The ARB_internalformat_query spec says:
+ *
+ * "If the <internalformat> parameter to GetInternalformativ is not
+ * color-, depth- or stencil-renderable, then an INVALID_ENUM error is
+ * generated."
+ */
+ if (_mesa_base_fbo_format(ctx, internalformat) == 0) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetInternalformativ(internalformat=%s)",
+ _mesa_lookup_enum_by_nr(internalformat));
+ return;
+ }
+
+ /* The ARB_internalformat_query spec says:
+ *
+ * "If the <bufSize> parameter to GetInternalformativ is negative, then
+ * an INVALID_VALUE error is generated."
+ */
+ if (bufSize < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glGetInternalformativ(target=%s)",
+ _mesa_lookup_enum_by_nr(target));
+ return;
+ }
+
+ switch (pname) {
+ case GL_SAMPLES:
+ buffer[0] = ctx->Const.MaxSamples;
+ count = 1;
+ break;
+ case GL_NUM_SAMPLE_COUNTS:
+ buffer[0] = 1;
+ count = 1;
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetInternalformativ(pname=%s)",
+ _mesa_lookup_enum_by_nr(pname));
+ return;
+ }
+
+ if (bufSize != 0 && params == NULL) {
+ /* Emit a warning to aid application debugging, but go ahead and do the
+ * memcpy (and probably crash) anyway.
+ */
+ _mesa_warning(ctx,
+ "glGetInternalformativ(bufSize = %d, but params = NULL)",
+ bufSize);
+ }
+
+ /* Copy the data from the temporary buffer to the buffer supplied by the
+ * application. Clamp the size of the copy to the size supplied by the
+ * application.
+ */
+ memcpy(params, buffer, MIN2(count, bufSize) * sizeof(GLint));
+
+ return;
+}
diff --git a/src/mesa/main/formatquery.h b/src/mesa/main/formatquery.h
new file mode 100644
index 0000000..585c3eb
--- /dev/null
+++ b/src/mesa/main/formatquery.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#pragma once
+#ifndef FORMATQUERY_H
+#define FORMATQUERY_H
+
+#include "compiler.h"
+#include "glheader.h"
+
+extern void GLAPIENTRY
+_mesa_GetInternalformativ(GLenum target, GLenum internalformat,
+ GLenum pname, GLsizei bufSize, GLint *params);
+
+#endif /* FORMATQUERY_H */
diff --git a/src/mesa/sources.mak b/src/mesa/sources.mak
index 8cde2c4..178ceb2 100644
--- a/src/mesa/sources.mak
+++ b/src/mesa/sources.mak
@@ -42,6 +42,7 @@ MAIN_FILES = \
$(SRCDIR)main/ffvertex_prog.c \
$(SRCDIR)main/ff_fragment_shader.cpp \
$(SRCDIR)main/fog.c \
+ $(SRCDIR)main/formatquery.c \
$(SRCDIR)main/formats.c \
$(SRCDIR)main/format_pack.c \
$(SRCDIR)main/format_unpack.c \
--
1.7.11.7
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