meta: Use internal functions to set texture parameters

_mesa_texture_parameteriv is used because (the more obvious)
_mesa_texture_parameteri just stuffs the parameter in an array and calls
_mesa_texture_parameteriv.  This just cuts out the middleman.

As a side bonus we no longer need check that ARB_stencil_texturing is
supported.  The test doesn't allow non-supporting implementations to
avoid any work, and it's redundant with the value-changed test.

Fix bug #93717 because the state restore commands at the bottom of
_mesa_meta_GenerateMipmap no longer depend on the bound state.

Fixes  piglit   arb_direct_state_access-generatetexturemipmap  with  the
changes  recently sent  to the  piglit mailing  list.  See  the bugzilla
entry for more info.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93717
Cc: "11.0 11.1" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>

4 files changed, 49 insertions, 24 deletions

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index 1ed0e4d..5f2e796 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -3179,8 +3179,10 @@ decompress_texture_image(struct gl_context *ctx,
 
       /* restrict sampling to the texture level of interest */
       if (target != GL_TEXTURE_RECTANGLE_ARB) {
-         _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, texImage->Level);
-         _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, texImage->Level);
+         _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_BASE_LEVEL,
+                                   (GLint *) &texImage->Level, false);
+         _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL,
+                                   (GLint *) &texImage->Level, false);
       }
 
       /* render quad w/ texture into renderbuffer */
@@ -3190,8 +3192,10 @@ decompress_texture_image(struct gl_context *ctx,
        * be restored by _mesa_meta_end().
        */
       if (target != GL_TEXTURE_RECTANGLE_ARB) {
-         _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave);
-         _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
+         _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_BASE_LEVEL,
+                                   &baseLevelSave, false);
+         _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL,
+                                   &maxLevelSave, false);
       }
 
    }
diff --git a/src/mesa/drivers/common/meta.h b/src/mesa/drivers/common/meta.h
index 3691e7d..074f70d 100644
--- a/src/mesa/drivers/common/meta.h
+++ b/src/mesa/drivers/common/meta.h
@@ -469,7 +469,7 @@ _mesa_meta_bind_rb_as_tex_image(struct gl_context *ctx,
 
 struct gl_sampler_object *
 _mesa_meta_setup_sampler(struct gl_context *ctx,
-                         const struct gl_texture_object *texObj,
+                         struct gl_texture_object *texObj,
                          GLenum target, GLenum filter, GLuint srcLevel);
 
 extern GLbitfield
diff --git a/src/mesa/drivers/common/meta_blit.c b/src/mesa/drivers/common/meta_blit.c
index 78ecfe2..5d80f7d 100644
--- a/src/mesa/drivers/common/meta_blit.c
+++ b/src/mesa/drivers/common/meta_blit.c
@@ -828,22 +828,29 @@ void
 _mesa_meta_fb_tex_blit_end(struct gl_context *ctx, GLenum target,
                            struct fb_tex_blit_state *blit)
 {
+   struct gl_texture_object *const texObj =
+      _mesa_get_current_tex_object(ctx, target);
+
    /* Restore texture object state, the texture binding will
     * be restored by _mesa_meta_end().
     */
    if (target != GL_TEXTURE_RECTANGLE_ARB) {
-      _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, blit->baseLevelSave);
-      _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, blit->maxLevelSave);
+      _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_BASE_LEVEL,
+                                &blit->baseLevelSave, false);
+      _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL,
+                                &blit->maxLevelSave, false);
    }
 
-   if (ctx->Extensions.ARB_stencil_texturing) {
-      const struct gl_texture_object *texObj =
-         _mesa_get_current_tex_object(ctx, target);
+   /* If ARB_stencil_texturing is not supported, the mode won't have changed. */
+   if (texObj->StencilSampling != blit->stencilSamplingSave) {
+      /* GLint so the compiler won't complain about type signedness mismatch
+       * in the call to _mesa_texture_parameteriv below.
+       */
+      const GLint param = blit->stencilSamplingSave ?
+         GL_STENCIL_INDEX : GL_DEPTH_COMPONENT;
 
-      if (texObj->StencilSampling != blit->stencilSamplingSave)
-         _mesa_TexParameteri(target, GL_DEPTH_STENCIL_TEXTURE_MODE,
-                             blit->stencilSamplingSave ?
-                             GL_STENCIL_INDEX : GL_DEPTH_COMPONENT);
+      _mesa_texture_parameteriv(ctx, texObj, GL_DEPTH_STENCIL_TEXTURE_MODE,
+                                &param, false);
    }
 
    _mesa_bind_sampler(ctx, ctx->Texture.CurrentUnit, blit->samp_obj_save);
@@ -895,7 +902,7 @@ _mesa_meta_bind_rb_as_tex_image(struct gl_context *ctx,
 
 struct gl_sampler_object *
 _mesa_meta_setup_sampler(struct gl_context *ctx,
-                         const struct gl_texture_object *texObj,
+                         struct gl_texture_object *texObj,
                          GLenum target, GLenum filter, GLuint srcLevel)
 {
    struct gl_sampler_object *samp_obj;
@@ -915,8 +922,10 @@ _mesa_meta_setup_sampler(struct gl_context *ctx,
    /* Prepare src texture state */
    _mesa_BindTexture(target, texObj->Name);
    if (target != GL_TEXTURE_RECTANGLE_ARB) {
-      _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel);
-      _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
+      _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_BASE_LEVEL,
+                                (GLint *) &srcLevel, false);
+      _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL,
+                                (GLint *) &srcLevel, false);
    }
 
    return samp_obj;
diff --git a/src/mesa/drivers/common/meta_generate_mipmap.c b/src/mesa/drivers/common/meta_generate_mipmap.c
index f20fcac..27435b2 100644
--- a/src/mesa/drivers/common/meta_generate_mipmap.c
+++ b/src/mesa/drivers/common/meta_generate_mipmap.c
@@ -185,6 +185,12 @@ _mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
    GLint swizzle[4];
    GLboolean swizzleSaved = GL_FALSE;
 
+   /* GLint so the compiler won't complain about type signedness mismatch in
+    * the calls to _mesa_texture_parameteriv below.
+    */
+   static const GLint always_false = GL_FALSE;
+   static const GLint always_true = GL_TRUE;
+
    if (fallback_required(ctx, target, texObj)) {
       _mesa_generate_mipmap(ctx, target, texObj);
       return;
@@ -248,13 +254,14 @@ _mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
    assert(mipmap->FBO != 0);
    _mesa_BindFramebuffer(GL_FRAMEBUFFER_EXT, mipmap->FBO);
 
-   _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, GL_FALSE);
+   _mesa_texture_parameteriv(ctx, texObj, GL_GENERATE_MIPMAP, &always_false, false);
 
    if (texObj->_Swizzle != SWIZZLE_NOOP) {
       static const GLint swizzleNoop[4] = { GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA };
       memcpy(swizzle, texObj->Swizzle, sizeof(swizzle));
       swizzleSaved = GL_TRUE;
-      _mesa_TexParameteriv(target, GL_TEXTURE_SWIZZLE_RGBA, swizzleNoop);
+      _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_SWIZZLE_RGBA,
+                                swizzleNoop, false);
    }
 
    /* Silence valgrind warnings about reading uninitialized stack. */
@@ -309,7 +316,8 @@ _mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
       /* Allocate storage for the destination mipmap image(s) */
 
       /* Set MaxLevel large enough to hold the new level when we allocate it */
-      _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, dstLevel);
+      _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL,
+                                (GLint *) &dstLevel, false);
 
       if (!prepare_mipmap_level(ctx, texObj, dstLevel,
                                 dstWidth, dstHeight, dstDepth,
@@ -323,7 +331,8 @@ _mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
       dstImage = _mesa_select_tex_image(texObj, faceTarget, dstLevel);
 
       /* limit minification to src level */
-      _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
+      _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL,
+                                (GLint *) &srcLevel, false);
 
       /* setup viewport */
       _mesa_set_viewport(ctx, 0, 0, 0, dstWidth, dstHeight);
@@ -373,9 +382,12 @@ _mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
 
    _mesa_meta_end(ctx);
 
-   _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
+   _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_MAX_LEVEL, &maxLevelSave,
+                             false);
    if (genMipmapSave)
-      _mesa_TexParameteri(target, GL_GENERATE_MIPMAP, genMipmapSave);
+      _mesa_texture_parameteriv(ctx, texObj, GL_GENERATE_MIPMAP, &always_true,
+                                false);
    if (swizzleSaved)
-      _mesa_TexParameteriv(target, GL_TEXTURE_SWIZZLE_RGBA, swizzle);
+      _mesa_texture_parameteriv(ctx, texObj, GL_TEXTURE_SWIZZLE_RGBA, swizzle,
+                                false);
 }