The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/skia/trunk/src/gpu/gl/mesa/SkMesaGLContext.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,108 @@
     1.4 +
     1.5 +/*
     1.6 + * Copyright 2011 Google Inc.
     1.7 + *
     1.8 + * Use of this source code is governed by a BSD-style license that can be
     1.9 + * found in the LICENSE file.
    1.10 + */
    1.11 +
    1.12 +#include <GL/osmesa.h>
    1.13 +
    1.14 +#include "gl/SkMesaGLContext.h"
    1.15 +#include "gl/GrGLDefines.h"
    1.16 +
    1.17 +SkMesaGLContext::AutoContextRestore::AutoContextRestore() {
    1.18 +    fOldContext = (Context)OSMesaGetCurrentContext();
    1.19 +    if (NULL != (OSMesaContext)fOldContext) {
    1.20 +        OSMesaGetColorBuffer((OSMesaContext)fOldContext,
    1.21 +                              &fOldWidth, &fOldHeight,
    1.22 +                              &fOldFormat, &fOldImage);
    1.23 +    }
    1.24 +}
    1.25 +
    1.26 +SkMesaGLContext::AutoContextRestore::~AutoContextRestore() {
    1.27 +    if (NULL != (OSMesaContext)fOldContext) {
    1.28 +        OSMesaMakeCurrent((OSMesaContext)fOldContext, fOldImage,
    1.29 +                          fOldFormat, fOldWidth, fOldHeight);
    1.30 +    }
    1.31 +}
    1.32 +
    1.33 +///////////////////////////////////////////////////////////////////////////////
    1.34 +
    1.35 +SkMesaGLContext::SkMesaGLContext()
    1.36 +    : fContext(static_cast<Context>(NULL))
    1.37 +    , fImage(NULL) {
    1.38 +    GR_STATIC_ASSERT(sizeof(Context) == sizeof(OSMesaContext));
    1.39 +}
    1.40 +
    1.41 +SkMesaGLContext::~SkMesaGLContext() {
    1.42 +    this->destroyGLContext();
    1.43 +}
    1.44 +
    1.45 +void SkMesaGLContext::destroyGLContext() {
    1.46 +    if (fImage) {
    1.47 +        sk_free(fImage);
    1.48 +        fImage = NULL;
    1.49 +    }
    1.50 +
    1.51 +    if (fContext) {
    1.52 +        OSMesaDestroyContext((OSMesaContext)fContext);
    1.53 +        fContext = static_cast<Context>(NULL);
    1.54 +    }
    1.55 +}
    1.56 +
    1.57 +static const GrGLint gBOGUS_SIZE = 16;
    1.58 +
    1.59 +const GrGLInterface* SkMesaGLContext::createGLContext() {
    1.60 +    /* Create an RGBA-mode context */
    1.61 +#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
    1.62 +    /* specify Z, stencil, accum sizes */
    1.63 +    fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, NULL);
    1.64 +#else
    1.65 +    fContext = (Context)OSMesaCreateContext(OSMESA_BGRA, NULL);
    1.66 +#endif
    1.67 +    if (!fContext) {
    1.68 +        SkDebugf("OSMesaCreateContext failed!\n");
    1.69 +        this->destroyGLContext();
    1.70 +        return NULL;
    1.71 +    }
    1.72 +    // Allocate the image buffer
    1.73 +    fImage = (GrGLubyte *) sk_malloc_throw(gBOGUS_SIZE * gBOGUS_SIZE *
    1.74 +                                           4 * sizeof(GrGLubyte));
    1.75 +    if (!fImage) {
    1.76 +        SkDebugf("Alloc image buffer failed!\n");
    1.77 +        this->destroyGLContext();
    1.78 +        return NULL;
    1.79 +    }
    1.80 +
    1.81 +    // Bind the buffer to the context and make it current
    1.82 +    if (!OSMesaMakeCurrent((OSMesaContext)fContext,
    1.83 +                           fImage,
    1.84 +                           GR_GL_UNSIGNED_BYTE,
    1.85 +                           gBOGUS_SIZE,
    1.86 +                           gBOGUS_SIZE)) {
    1.87 +        SkDebugf("OSMesaMakeCurrent failed!\n");
    1.88 +        this->destroyGLContext();
    1.89 +        return NULL;
    1.90 +    }
    1.91 +
    1.92 +    const GrGLInterface* interface = GrGLCreateMesaInterface();
    1.93 +    if (!interface) {
    1.94 +        SkDebugf("Could not create GL interface!\n");
    1.95 +        this->destroyGLContext();
    1.96 +        return NULL;
    1.97 +    }
    1.98 +    return interface;
    1.99 +
   1.100 +}
   1.101 +
   1.102 +void SkMesaGLContext::makeCurrent() const {
   1.103 +    if (fContext) {
   1.104 +        if (!OSMesaMakeCurrent((OSMesaContext)fContext, fImage,
   1.105 +                               GR_GL_UNSIGNED_BYTE, gBOGUS_SIZE, gBOGUS_SIZE)) {
   1.106 +            SkDebugf("Could not make MESA context current.");
   1.107 +        }
   1.108 +    }
   1.109 +}
   1.110 +
   1.111 +void SkMesaGLContext::swapBuffers() const { }