[Mesa-dev] [PATCH 1/2] osmesa: add new OSMesaCreateContextAttribs function
Brian Paul
brianp at vmware.com
Tue Dec 15 16:59:29 PST 2015
This allows specifying a GL profile and version so one can get a core-
profile context.
---
docs/relnotes/11.2.0.html | 2 +
include/GL/osmesa.h | 45 ++++++++++++++++-
src/mesa/drivers/osmesa/osmesa.c | 104 ++++++++++++++++++++++++++++++++++++++-
3 files changed, 148 insertions(+), 3 deletions(-)
diff --git a/docs/relnotes/11.2.0.html b/docs/relnotes/11.2.0.html
index 12e0f07..e382856 100644
--- a/docs/relnotes/11.2.0.html
+++ b/docs/relnotes/11.2.0.html
@@ -56,6 +56,8 @@ Note: some of the new features are only available with certain drivers.
<li>GL_ARB_vertex_type_10f_11f_11f_rev on freedreno/a4xx</li>
<li>GL_KHR_texture_compression_astc_ldr on freedreno/a4xx</li>
<li>GL_AMD_performance_monitor on radeonsi (CIK+ only)</li>
+<li>New OSMesaCreateContextAttribs() function (for creating core profile
+ contexts)</li>
</ul>
<h2>Bug fixes</h2>
diff --git a/include/GL/osmesa.h b/include/GL/osmesa.h
index ca0d167..39cd54e 100644
--- a/include/GL/osmesa.h
+++ b/include/GL/osmesa.h
@@ -58,8 +58,8 @@ extern "C" {
#include <GL/gl.h>
-#define OSMESA_MAJOR_VERSION 10
-#define OSMESA_MINOR_VERSION 0
+#define OSMESA_MAJOR_VERSION 11
+#define OSMESA_MINOR_VERSION 2
#define OSMESA_PATCH_VERSION 0
@@ -95,6 +95,18 @@ extern "C" {
#define OSMESA_MAX_WIDTH 0x24 /* new in 4.0 */
#define OSMESA_MAX_HEIGHT 0x25 /* new in 4.0 */
+/*
+ * Accepted in OSMesaCreateContextAttrib's attribute list.
+ */
+#define OSMESA_DEPTH_BITS 0x30
+#define OSMESA_STENCIL_BITS 0x31
+#define OSMESA_ACCUM_BITS 0x32
+#define OSMESA_PROFILE 0x33
+#define OSMESA_CORE_PROFILE 0x34
+#define OSMESA_COMPAT_PROFILE 0x35
+#define OSMESA_CONTEXT_MAJOR_VERSION 0x36
+#define OSMESA_CONTEXT_MINOR_VERSION 0x37
+
typedef struct osmesa_context *OSMesaContext;
@@ -128,6 +140,35 @@ OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits,
/*
+ * Create an Off-Screen Mesa rendering context with attribute list.
+ * The list is composed of (attribute, value) pairs and terminated with
+ * attribute==0. Supported Attributes:
+ *
+ * Attributes Values
+ * --------------------------------------------------------------------------
+ * OSMESA_FORMAT OSMESA_RGBA*, OSMESA_BGRA, OSMESA_ARGB, etc.
+ * OSMESA_DEPTH_BITS 0*, 16, 24, 32
+ * OSMESA_STENCIL_BITS 0*, 8
+ * OSMESA_ACCUM_BITS 0*, 16
+ * OSMESA_PROFILE OSMESA_COMPAT_PROFILE*, OSMESA_CORE_PROFILE
+ * OSMESA_CONTEXT_MAJOR_VERSION 1*, 2, 3
+ * OSMESA_CONTEXT_MINOR_VERSION 0+
+ *
+ * Note: * = default value
+ *
+ * We return a context version >= what's specified by OSMESA_CONTEXT_MAJOR/
+ * MINOR_VERSION for the given profile. For example, if you request a GL 1.4
+ * compat profile, you might get a GL 3.0 compat profile.
+ * Otherwise, null is returned if the version/profile is not supported.
+ *
+ * New in Mesa 11.2
+ */
+GLAPI OSMesaContext GLAPIENTRY
+OSMesaCreateContextAttribs( const int *attribList, OSMesaContext sharelist );
+
+
+
+/*
* Destroy an Off-Screen Mesa rendering context.
*
* Input: ctx - the context to destroy
diff --git a/src/mesa/drivers/osmesa/osmesa.c b/src/mesa/drivers/osmesa/osmesa.c
index 5c7dcac..8f14dfd 100644
--- a/src/mesa/drivers/osmesa/osmesa.c
+++ b/src/mesa/drivers/osmesa/osmesa.c
@@ -645,10 +645,104 @@ GLAPI OSMesaContext GLAPIENTRY
OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits,
GLint accumBits, OSMesaContext sharelist )
{
+ int attribs[100], n = 0;
+
+ attribs[n++] = OSMESA_FORMAT;
+ attribs[n++] = format;
+ attribs[n++] = OSMESA_DEPTH_BITS;
+ attribs[n++] = depthBits;
+ attribs[n++] = OSMESA_STENCIL_BITS;
+ attribs[n++] = stencilBits;
+ attribs[n++] = OSMESA_ACCUM_BITS;
+ attribs[n++] = accumBits;
+ attribs[n++] = 0;
+
+ return OSMesaCreateContextAttribs(attribs, sharelist);
+}
+
+
+/**
+ * New in Mesa 11.2
+ *
+ * Create context with attribute list.
+ */
+GLAPI OSMesaContext GLAPIENTRY
+OSMesaCreateContextAttribs(const int *attribList, OSMesaContext sharelist)
+{
OSMesaContext osmesa;
struct dd_function_table functions;
GLint rind, gind, bind, aind;
GLint redBits = 0, greenBits = 0, blueBits = 0, alphaBits =0;
+ GLenum format = OSMESA_RGBA;
+ GLint depthBits = 0, stencilBits = 0, accumBits = 0;
+ int profile = OSMESA_COMPAT_PROFILE, version_major = 1, version_minor = 0;
+ gl_api api_profile = API_OPENGL_COMPAT;
+ int i;
+
+ osmesa = (OSMesaContext) CALLOC_STRUCT(osmesa_context);
+ if (!osmesa)
+ return NULL;
+
+ for (i = 0; attribList[i]; i += 2) {
+ switch (attribList[i]) {
+ case OSMESA_FORMAT:
+ format = attribList[i+1];
+ switch (format) {
+ case OSMESA_COLOR_INDEX:
+ case OSMESA_RGBA:
+ case OSMESA_BGRA:
+ case OSMESA_ARGB:
+ case OSMESA_RGB:
+ case OSMESA_BGR:
+ case OSMESA_RGB_565:
+ /* legal */
+ break;
+ default:
+ return NULL;
+ }
+ break;
+ case OSMESA_DEPTH_BITS:
+ depthBits = attribList[i+1];
+ if (depthBits < 0)
+ return NULL;
+ break;
+ case OSMESA_STENCIL_BITS:
+ stencilBits = attribList[i+1];
+ if (stencilBits < 0)
+ return NULL;
+ break;
+ case OSMESA_ACCUM_BITS:
+ accumBits = attribList[i+1];
+ if (accumBits < 0)
+ return NULL;
+ break;
+ case OSMESA_PROFILE:
+ profile = attribList[i+1];
+ if (profile == OSMESA_COMPAT_PROFILE)
+ api_profile = API_OPENGL_COMPAT;
+ else if (profile == OSMESA_CORE_PROFILE)
+ api_profile = API_OPENGL_CORE;
+ else
+ return NULL;
+ break;
+ case OSMESA_CONTEXT_MAJOR_VERSION:
+ version_major = attribList[i+1];
+ if (version_major < 1)
+ return NULL;
+ break;
+ case OSMESA_CONTEXT_MINOR_VERSION:
+ version_minor = attribList[i+1];
+ if (version_minor < 0)
+ return NULL;
+ break;
+ case 0:
+ /* end of list */
+ break;
+ default:
+ fprintf(stderr, "Bad attribute in OSMesaCreateContextAttribs()\n");
+ return NULL;
+ }
+ }
rind = gind = bind = aind = 0;
if (format==OSMESA_RGBA) {
@@ -742,7 +836,7 @@ OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits,
functions.UpdateState = osmesa_update_state;
if (!_mesa_initialize_context(&osmesa->mesa,
- API_OPENGL_COMPAT,
+ api_profile,
osmesa->gl_visual,
sharelist ? &sharelist->mesa
: (struct gl_context *) NULL,
@@ -819,6 +913,13 @@ OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits,
_mesa_compute_version(ctx);
+ if (ctx->Version < version_major * 10 + version_minor) {
+ _mesa_destroy_visual(osmesa->gl_visual);
+ _mesa_free_context_data(ctx);
+ free(osmesa);
+ return NULL;
+ }
+
/* Exec table initialization requires the version to be computed */
_mesa_initialize_dispatch_tables(ctx);
_mesa_initialize_vbo_vtxfmt(ctx);
@@ -1121,6 +1222,7 @@ struct name_function
static struct name_function functions[] = {
{ "OSMesaCreateContext", (OSMESAproc) OSMesaCreateContext },
{ "OSMesaCreateContextExt", (OSMESAproc) OSMesaCreateContextExt },
+ { "OSMesaCreateContextAttribs", (OSMESAproc) OSMesaCreateContextAttribs },
{ "OSMesaDestroyContext", (OSMESAproc) OSMesaDestroyContext },
{ "OSMesaMakeCurrent", (OSMESAproc) OSMesaMakeCurrent },
{ "OSMesaGetCurrentContext", (OSMESAproc) OSMesaGetCurrentContext },
--
1.9.1
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