3 * Copyright 2011 Google Inc.
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
11 #include "gl/SkMesaGLContext.h"
12 #include "gl/GrGLDefines.h"
14 static const GrGLint gBOGUS_SIZE = 16;
16 SkMesaGLContext::SkMesaGLContext()
17 : fContext(static_cast<Context>(NULL))
19 GR_STATIC_ASSERT(sizeof(Context) == sizeof(OSMesaContext));
21 /* Create an RGBA-mode context */
22 #if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
23 /* specify Z, stencil, accum sizes */
24 fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, NULL);
26 fContext = (Context)OSMesaCreateContext(OSMESA_BGRA, NULL);
29 SkDebugf("OSMesaCreateContext failed!\n");
30 this->destroyGLContext();
33 // Allocate the image buffer
34 fImage = (GrGLubyte *) sk_malloc_throw(gBOGUS_SIZE * gBOGUS_SIZE *
35 4 * sizeof(GrGLubyte));
37 SkDebugf("Alloc image buffer failed!\n");
38 this->destroyGLContext();
42 // Bind the buffer to the context and make it current
43 if (!OSMesaMakeCurrent((OSMesaContext)fContext,
48 SkDebugf("OSMesaMakeCurrent failed!\n");
49 this->destroyGLContext();
53 fGL.reset(GrGLCreateMesaInterface());
54 if (NULL == fGL.get()) {
55 SkDebugf("Could not create GL interface!\n");
56 this->destroyGLContext();
60 if (!fGL->validate()) {
61 SkDebugf("Could not validate GL interface!\n");
62 this->destroyGLContext();
67 SkMesaGLContext::~SkMesaGLContext() {
68 this->destroyGLContext();
71 void SkMesaGLContext::destroyGLContext() {
79 OSMesaDestroyContext((OSMesaContext)fContext);
80 fContext = static_cast<Context>(NULL);
86 void SkMesaGLContext::makeCurrent() const {
88 if (!OSMesaMakeCurrent((OSMesaContext)fContext, fImage,
89 GR_GL_UNSIGNED_BYTE, gBOGUS_SIZE, gBOGUS_SIZE)) {
90 SkDebugf("Could not make MESA context current.");
95 void SkMesaGLContext::swapBuffers() const { }