Add image functions to GrGLInterface

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4840

Change-Id: I250cc4e637765c321c90e33c9b3f25c4ad12fe04
Reviewed-on: https://skia-review.googlesource.com/4840
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

3 files changed, 43 insertions, 0 deletions

diff --git a/src/gpu/gl/GrGLAssembleInterface.cpp b/src/gpu/gl/GrGLAssembleInterface.cpp
index 9dccd4bc22..7c51f4e806 100644
--- a/src/gpu/gl/GrGLAssembleInterface.cpp
+++ b/src/gpu/gl/GrGLAssembleInterface.cpp
@@ -532,6 +532,14 @@ const GrGLInterface* GrGLAssembleGLInterface(void* ctx, GrGLGetProc get) {
         GET_PROC(DeleteSync);
     }
 
+    if (glVer >= GR_GL_VER(4, 2) || extensions.has("GL_ARB_shader_image_load_store")) {
+        GET_PROC(BindImageTexture);
+        GET_PROC(MemoryBarrier);
+    }
+    if (glVer >= GR_GL_VER(4, 5) || extensions.has("GL_ARB_ES3_1_compatibility")) {
+        GET_PROC(MemoryBarrierByRegion);
+    }
+
     interface->fStandard = kGL_GrGLStandard;
     interface->fExtensions.swap(&extensions);
 
@@ -938,6 +946,12 @@ const GrGLInterface* GrGLAssembleGLESInterface(void* ctx, GrGLGetProc get) {
         GET_PROC(DeleteSync);
     }
 
+    if (version >= GR_GL_VER(3, 1)) {
+        GET_PROC(BindImageTexture);
+        GET_PROC(MemoryBarrier);
+        GET_PROC(MemoryBarrierByRegion);
+    }
+
     interface->fStandard = kGLES_GrGLStandard;
     interface->fExtensions.swap(&extensions);
 
diff --git a/src/gpu/gl/GrGLDefines.h b/src/gpu/gl/GrGLDefines.h
index 8f739cc1f6..18dee280f0 100644
--- a/src/gpu/gl/GrGLDefines.h
+++ b/src/gpu/gl/GrGLDefines.h
@@ -242,6 +242,14 @@
 #define GR_GL_MULTISAMPLE_COVERAGE_MODES     0x8E12
 #define GR_GL_MAX_TEXTURE_BUFFER_SIZE        0x8C2B
 
+#define GR_GL_MAX_IMAGE_UNITS                                 0x8F38
+#define GR_GL_MAX_COMBINED_IMAGE_UNITS_AND_FRAGMENT_OUTPUTS   0x8F39
+#define GR_GL_MAX_IMAGE_SAMPLES                               0x906D
+#define GR_GL_MAX_VERTEX_IMAGE_UNIFORMS                       0x90CA
+#define GR_GL_MAX_GEOMETRY_IMAGE_UNIFORMS                     0x90CD
+#define GR_GL_MAX_FRAGMENT_IMAGE_UNIFORMS                     0x90CE
+#define GR_GL_MAX_COMBINED_IMAGE_UNIFORMS                     0x90CF
+
 /* GetTextureParameter */
 /*      GL_TEXTURE_MAG_FILTER */
 /*      GL_TEXTURE_MIN_FILTER */
@@ -819,6 +827,7 @@
 /* Buffer Object */
 #define GR_GL_READ_ONLY                          0x88B8
 #define GR_GL_WRITE_ONLY                         0x88B9
+#define GR_GL_READ_WRITE                         0x88BA
 #define GR_GL_BUFFER_MAPPED                      0x88BC
 
 #define GR_GL_MAP_READ_BIT                       0x0001
diff --git a/src/gpu/gl/GrGLInterface.cpp b/src/gpu/gl/GrGLInterface.cpp
index 72c2b46d41..45d84add8d 100644
--- a/src/gpu/gl/GrGLInterface.cpp
+++ b/src/gpu/gl/GrGLInterface.cpp
@@ -830,5 +830,25 @@ bool GrGLInterface::validate() const {
         }
     }
 
+    if (kGL_GrGLStandard == fStandard) {
+        if (glVer >= GR_GL_VER(4,2) || fExtensions.has("GL_ARB_shader_image_load_store")) {
+            if (nullptr == fFunctions.fBindImageTexture ||
+                nullptr == fFunctions.fMemoryBarrier) {
+                RETURN_FALSE_INTERFACE;
+            }
+        }
+        if (glVer >= GR_GL_VER(4,5) || fExtensions.has("GL_ARB_ES3_1_compatibility")) {
+            if (nullptr == fFunctions.fMemoryBarrierByRegion) {
+                RETURN_FALSE_INTERFACE;
+            }
+        }
+    } else if (kGLES_GrGLStandard == fStandard && glVer >= GR_GL_VER(3,1)) {
+        if (nullptr == fFunctions.fBindImageTexture ||
+            nullptr == fFunctions.fMemoryBarrier ||
+            nullptr == fFunctions.fMemoryBarrierByRegion) {
+            RETURN_FALSE_INTERFACE;
+        }
+    }
+
     return true;
 }