vrend: Replace 1D texture by 2D one for OpenGL ES v2

OpenGL ES don't support 1D texture.
So we replace these textures by some 2D texture with one of
the component set to 0.5

v2: Use new use_gles state on vrend_shader_cfg.

Signed-off-by: Elie Tournier <elie.tournier@collabora.com>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/vrend_renderer.c

@@ -4499,6 +4499,16 @@ int vrend_renderer_resource_create(struct vrend_renderer_resource_create_args *a
          gr->target = GL_TEXTURE_2D;
       }
 
+      /* fallback for 1D textures */
+      if (vrend_state.use_gles && gr->target == GL_TEXTURE_1D) {
+         gr->target = GL_TEXTURE_2D;
+      }
+
+      /* fallback for 1D array textures */
+      if (vrend_state.use_gles && gr->target == GL_TEXTURE_1D_ARRAY) {
+         gr->target = GL_TEXTURE_2D_ARRAY;
+      }
+
       glGenTextures(1, &gr->id);
       glBindTexture(gr->target, gr->id);
 

src/vrend_shader.c

@@ -1463,8 +1463,16 @@ static int translate_tex(struct dump_ctx *ctx,
       const char *cname = tgsi_proc_to_prefix(ctx->prog_type);
       const struct tgsi_full_src_register *src = &inst->Src[sampler_index];
       snprintf(buf, 255, "%s = %s(%s(vec4(vec4(texture%s(%s, %s%s%s%s)) * %sshadmask%d + %sshadadd%d)%s));\n", dsts[0], dstconv, dtypeprefix, tex_ext, srcs[sampler_index], srcs[0], twm, offbuf, bias, cname, src->Register.Index, cname, src->Register.Index, writemask);
-   } else
+   } else {
+      /* OpenGL ES do not support 1D texture
+       * so we use a 2D texture with a parameter set to 0.5
+       */
+      if (ctx->cfg->use_gles && inst->Texture.Texture == TGSI_TEXTURE_1D) {
+         snprintf(buf, 255, "%s = %s(%s(texture2D(%s, vec2(%s%s%s%s, 0.5))%s));\n", dsts[0], dstconv, dtypeprefix, srcs[sampler_index], srcs[0], twm, offbuf, bias, dst0_override_no_wm ? "" : writemask);
+      } else {
          snprintf(buf, 255, "%s = %s(%s(texture%s(%s, %s%s%s%s)%s));\n", dsts[0], dstconv, dtypeprefix, tex_ext, srcs[sampler_index], srcs[0], twm, offbuf, bias, dst0_override_no_wm ? "" : writemask);
+      }
+   }
    return emit_buf(ctx, buf);
 }
 
@@ -2534,7 +2542,14 @@ static char *emit_ios(struct dump_ctx *ctx, char *glsl_hdr)
          const char *sname;
 
          sname = tgsi_proc_to_prefix(ctx->prog_type);
+         /* OpenGL ES do not support 1D texture
+          * so we use a 2D texture with a parameter set to 0.5
+          */
+         if (ctx->cfg->use_gles && !memcmp(stc, "1D", sizeof(stc)))
+            snprintf(buf, 255, "uniform %csampler2D %ssamp%d;\n", ptc, sname, i);
+         else
             snprintf(buf, 255, "uniform %csampler%s %ssamp%d;\n", ptc, stc, sname, i);
+
          STRCAT_WITH_RET(glsl_hdr, buf);
          if (is_shad) {
             snprintf(buf, 255, "uniform vec4 %sshadmask%d;\n", sname, i);