1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9 #include <GL/osmesa.h>
10
11 #include "gl/mesa/GLTestContext_mesa.h"
12 #include "gl/GrGLDefines.h"
13
14 #include "gl/GrGLAssembleInterface.h"
15 #include "gl/GrGLUtil.h"
16 #include "osmesa_wrapper.h"
17
18 namespace {
19
osmesa_get(void * ctx,const char name[])20 static GrGLFuncPtr osmesa_get(void* ctx, const char name[]) {
21 SkASSERT(nullptr == ctx);
22 SkASSERT(OSMesaGetCurrentContext());
23 return OSMesaGetProcAddress(name);
24 }
25
create_mesa_interface()26 static const GrGLInterface* create_mesa_interface() {
27 if (nullptr == OSMesaGetCurrentContext()) {
28 return nullptr;
29 }
30 return GrGLAssembleInterface(nullptr, osmesa_get);
31 }
32
33 static const GrGLint gBOGUS_SIZE = 16;
34
35 class MesaGLContext : public sk_gpu_test::GLTestContext {
36 private:
37 typedef intptr_t Context;
38
39 public:
40 MesaGLContext(MesaGLContext* shareContext);
41 ~MesaGLContext() override;
42
43 private:
44 void destroyGLContext();
45
46 void onPlatformMakeCurrent() const override;
47
48 void onPlatformSwapBuffers() const override;
49
50 GrGLFuncPtr onPlatformGetProcAddress(const char *) const override;
51
52 Context fContext;
53 GrGLubyte *fImage;
54 };
55
MesaGLContext(MesaGLContext * shareContext)56 MesaGLContext::MesaGLContext(MesaGLContext* shareContext)
57 : fContext(static_cast<Context>(0))
58 , fImage(nullptr) {
59 GR_STATIC_ASSERT(sizeof(Context) == sizeof(OSMesaContext));
60 OSMesaContext mesaShareContext = shareContext ? (OSMesaContext)(shareContext->fContext)
61 : nullptr;
62
63 /* Create an RGBA-mode context */
64 #if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
65 /* specify Z, stencil, accum sizes */
66 fContext = (Context)OSMesaCreateContextExt(OSMESA_BGRA, 0, 0, 0, mesaShareContext);
67 #else
68 fContext = (Context) OSMesaCreateContext(OSMESA_BGRA, mesaShareContext);
69 #endif
70 if (!fContext) {
71 SkDebugf("OSMesaCreateContext failed!\n");
72 this->destroyGLContext();
73 return;
74 }
75 // Allocate the image buffer
76 fImage = (GrGLubyte *) sk_malloc_throw(gBOGUS_SIZE * gBOGUS_SIZE *
77 4 * sizeof(GrGLubyte));
78 if (!fImage) {
79 SkDebugf("Alloc image buffer failed!\n");
80 this->destroyGLContext();
81 return;
82 }
83
84 // Bind the buffer to the context and make it current
85 if (!OSMesaMakeCurrent((OSMesaContext) fContext,
86 fImage,
87 GR_GL_UNSIGNED_BYTE,
88 gBOGUS_SIZE,
89 gBOGUS_SIZE)) {
90 SkDebugf("OSMesaMakeCurrent failed!\n");
91 this->destroyGLContext();
92 return;
93 }
94
95 sk_sp<const GrGLInterface> gl(create_mesa_interface());
96 if (nullptr == gl.get()) {
97 SkDebugf("Could not create GL interface!\n");
98 this->destroyGLContext();
99 return;
100 }
101
102 if (!gl->validate()) {
103 SkDebugf("Could not validate GL interface!\n");
104 this->destroyGLContext();
105 return;
106 }
107
108 this->init(gl.release());
109 }
110
~MesaGLContext()111 MesaGLContext::~MesaGLContext() {
112 this->teardown();
113 this->destroyGLContext();
114 }
115
destroyGLContext()116 void MesaGLContext::destroyGLContext() {
117 if (fImage) {
118 sk_free(fImage);
119 fImage = nullptr;
120 }
121
122 if (fContext) {
123 OSMesaDestroyContext((OSMesaContext) fContext);
124 fContext = static_cast<Context>(0);
125 }
126 }
127
128
onPlatformMakeCurrent() const129 void MesaGLContext::onPlatformMakeCurrent() const {
130 if (fContext) {
131 if (!OSMesaMakeCurrent((OSMesaContext) fContext, fImage,
132 GR_GL_UNSIGNED_BYTE, gBOGUS_SIZE, gBOGUS_SIZE)) {
133 SkDebugf("Could not make MESA context current.");
134 }
135 }
136 }
137
onPlatformSwapBuffers() const138 void MesaGLContext::onPlatformSwapBuffers() const { }
139
onPlatformGetProcAddress(const char * procName) const140 GrGLFuncPtr MesaGLContext::onPlatformGetProcAddress(const char *procName) const {
141 return OSMesaGetProcAddress(procName);
142 }
143 } // anonymous namespace
144
145
146 namespace sk_gpu_test {
CreateMesaGLTestContext(GLTestContext * shareContext)147 GLTestContext *CreateMesaGLTestContext(GLTestContext* shareContext) {
148 MesaGLContext* mesaShareContext = reinterpret_cast<MesaGLContext*>(shareContext);
149 MesaGLContext *ctx = new MesaGLContext(mesaShareContext);
150 if (!ctx->isValid()) {
151 delete ctx;
152 return nullptr;
153 }
154 return ctx;
155 }
156 } // sk_gpu_test
157