5 files changed, 263 insertions, 10 deletions

diff --git a/mesalib/src/mesa/drivers/common/meta.c b/mesalib/src/mesa/drivers/common/meta.c
index 3e553341d..8d589e4c3 100644
--- a/mesalib/src/mesa/drivers/common/meta.c
+++ b/mesalib/src/mesa/drivers/common/meta.c
@@ -182,7 +182,6 @@ struct save_state
    GLboolean Lighting;
 };
 
-
 /**
  * Temporary texture used for glBlitFramebuffer, glDrawPixels, etc.
  * This is currently shared by all the meta ops.  But we could create a
@@ -221,6 +220,9 @@ struct clear_state
    GLuint VBO;
    GLuint ShaderProg;
    GLint ColorLocation;
+
+   GLuint IntegerShaderProg;
+   GLint IntegerColorLocation;
 };
 
 
@@ -310,6 +312,67 @@ struct gl_meta_state
    struct drawtex_state DrawTex;  /**< For _mesa_meta_DrawTex() */
 };
 
+static GLuint
+compile_shader_with_debug(struct gl_context *ctx, GLenum target, const GLcharARB *source)
+{
+   GLuint shader;
+   GLint ok, size;
+   GLchar *info;
+
+   shader = _mesa_CreateShaderObjectARB(target);
+   _mesa_ShaderSourceARB(shader, 1, &source, NULL);
+   _mesa_CompileShaderARB(shader);
+
+   _mesa_GetShaderiv(shader, GL_COMPILE_STATUS, &ok);
+   if (ok)
+      return shader;
+
+   _mesa_GetShaderiv(shader, GL_INFO_LOG_LENGTH, &size);
+   if (size == 0)
+      return 0;
+
+   info = malloc(size);
+   if (!info)
+      return 0;
+
+   _mesa_GetProgramInfoLog(shader, size, NULL, info);
+   _mesa_problem(ctx,
+		 "meta program compile failed:\n%s\n"
+		 "source:\n%s\n",
+		 info, source);
+
+   free(info);
+
+   return 0;
+}
+
+static GLuint
+link_program_with_debug(struct gl_context *ctx, GLuint program)
+{
+   GLint ok, size;
+   GLchar *info;
+
+   _mesa_LinkProgramARB(program);
+
+   _mesa_GetProgramiv(program, GL_LINK_STATUS, &ok);
+   if (ok)
+      return program;
+
+   _mesa_GetProgramiv(program, GL_INFO_LOG_LENGTH, &size);
+   if (size == 0)
+      return 0;
+
+   info = malloc(size);
+   if (!info)
+      return 0;
+
+   _mesa_GetProgramInfoLog(program, size, NULL, info);
+   _mesa_problem(ctx, "meta program link failed:\n%s", info);
+
+   free(info);
+
+   return 0;
+}
 
 /**
  * Initialize meta-ops for a context.
@@ -1646,6 +1709,22 @@ meta_glsl_clear_init(struct gl_context *ctx, struct clear_state *clear)
       "{\n"
       "   gl_FragColor = color;\n"
       "}\n";
+   const char *vs_int_source =
+      "#version 130\n"
+      "attribute vec4 position;\n"
+      "void main()\n"
+      "{\n"
+      "   gl_Position = position;\n"
+      "}\n";
+   const char *fs_int_source =
+      "#version 130\n"
+      "uniform ivec4 color;\n"
+      "out ivec4 out_color;\n"
+      "\n"
+      "void main()\n"
+      "{\n"
+      "   out_color = color;\n"
+      "}\n";
    GLuint vs, fs;
 
    if (clear->ArrayObj != 0)
@@ -1679,6 +1758,26 @@ meta_glsl_clear_init(struct gl_context *ctx, struct clear_state *clear)
 
    clear->ColorLocation = _mesa_GetUniformLocationARB(clear->ShaderProg,
 						      "color");
+
+   if (ctx->Const.GLSLVersion >= 130) {
+      vs = compile_shader_with_debug(ctx, GL_VERTEX_SHADER, vs_int_source);
+      fs = compile_shader_with_debug(ctx, GL_FRAGMENT_SHADER, fs_int_source);
+
+      clear->IntegerShaderProg = _mesa_CreateProgramObjectARB();
+      _mesa_AttachShader(clear->IntegerShaderProg, fs);
+      _mesa_AttachShader(clear->IntegerShaderProg, vs);
+      _mesa_BindAttribLocationARB(clear->IntegerShaderProg, 0, "position");
+
+      /* Note that user-defined out attributes get automatically assigned
+       * locations starting from 0, so we don't need to explicitly
+       * BindFragDataLocation to 0.
+       */
+
+      link_program_with_debug(ctx, clear->IntegerShaderProg);
+
+      clear->IntegerColorLocation =
+	 _mesa_GetUniformLocationARB(clear->IntegerShaderProg, "color");
+   }
 }
 
 /**
@@ -1722,9 +1821,15 @@ _mesa_meta_glsl_Clear(struct gl_context *ctx, GLbitfield buffers)
 
    meta_glsl_clear_init(ctx, clear);
 
-   _mesa_UseProgramObjectARB(clear->ShaderProg);
-   _mesa_Uniform4fvARB(clear->ColorLocation, 1,
-		       ctx->Color.ClearColor.f);
+   if (fb->_IntegerColor) {
+      _mesa_UseProgramObjectARB(clear->IntegerShaderProg);
+      _mesa_Uniform4ivARB(clear->IntegerColorLocation, 1,
+			  ctx->Color.ClearColor.i);
+   } else {
+      _mesa_UseProgramObjectARB(clear->ShaderProg);
+      _mesa_Uniform4fvARB(clear->ColorLocation, 1,
+			  ctx->Color.ClearColor.f);
+   }
 
    _mesa_BindVertexArray(clear->ArrayObj);
    _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, clear->VBO);
diff --git a/mesalib/src/mesa/main/format_unpack.c b/mesalib/src/mesa/main/format_unpack.c
index eaa33dfdb..525bbcb1c 100644
--- a/mesalib/src/mesa/main/format_unpack.c
+++ b/mesalib/src/mesa/main/format_unpack.c
@@ -1258,7 +1258,127 @@ _mesa_unpack_rgba_row(gl_format format, GLuint n,
    }
 }
 
+static void
+unpack_int_rgba_RGBA_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
+{
+   memcpy(dst, src, n * 4 * sizeof(GLuint));
+}
+
+static void
+unpack_int_rgba_RGB_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i * 3 + 0];
+      dst[i][1] = src[i * 3 + 1];
+      dst[i][2] = src[i * 3 + 2];
+      dst[i][3] = 1;
+   }
+}
+
+static void
+unpack_int_rgba_RG_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i * 2 + 0];
+      dst[i][1] = src[i * 2 + 1];
+      dst[i][2] = 0;
+      dst[i][3] = 1;
+   }
+}
+
+static void
+unpack_int_rgba_R_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = src[i];
+      dst[i][1] = 0;
+      dst[i][2] = 0;
+      dst[i][3] = 1;
+   }
+}
+
+static void
+unpack_int_rgba_LUMINANCE_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = dst[i][1] = dst[i][2] = src[i];
+      dst[i][3] = 1;
+   }
+}
 
+static void
+unpack_int_rgba_LUMINANCE_ALPHA_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = dst[i][1] = dst[i][2] = src[i * 2 + 0];
+      dst[i][3] = src[i * 2 + 1];
+   }
+}
+
+static void
+unpack_int_rgba_INTENSITY_UINT32(const GLuint *src, GLuint dst[][4], GLuint n)
+{
+   unsigned int i;
+
+   for (i = 0; i < n; i++) {
+      dst[i][0] = dst[i][1] = dst[i][2] = dst[i][3] = src[i];
+   }
+}
+
+void
+_mesa_unpack_int_rgba_row(gl_format format, GLuint n,
+			  const void *src, GLuint dst[][4])
+{
+   switch (format) {
+      /* Since there won't be any sign extension happening, there's no need to
+       * make separate paths for 32-bit-to-32-bit integer unpack.
+       */
+   case MESA_FORMAT_RGBA_UINT32:
+   case MESA_FORMAT_RGBA_INT32:
+      unpack_int_rgba_RGBA_UINT32(src, dst, n);
+      break;
+   case MESA_FORMAT_RGB_UINT32:
+   case MESA_FORMAT_RGB_INT32:
+      unpack_int_rgba_RGB_UINT32(src, dst, n);
+      break;
+   case MESA_FORMAT_RG_UINT32:
+   case MESA_FORMAT_RG_INT32:
+      unpack_int_rgba_RG_UINT32(src, dst, n);
+      break;
+   case MESA_FORMAT_R_UINT32:
+   case MESA_FORMAT_R_INT32:
+      unpack_int_rgba_R_UINT32(src, dst, n);
+      break;
+
+   case MESA_FORMAT_LUMINANCE_UINT32:
+   case MESA_FORMAT_LUMINANCE_INT32:
+      unpack_int_rgba_LUMINANCE_UINT32(src, dst, n);
+      break;
+   case MESA_FORMAT_LUMINANCE_ALPHA_UINT32:
+   case MESA_FORMAT_LUMINANCE_ALPHA_INT32:
+      unpack_int_rgba_LUMINANCE_ALPHA_UINT32(src, dst, n);
+      break;
+   case MESA_FORMAT_INTENSITY_UINT32:
+   case MESA_FORMAT_INTENSITY_INT32:
+      unpack_int_rgba_INTENSITY_UINT32(src, dst, n);
+      break;
+
+   default:
+      _mesa_problem(NULL, "%s: bad format %s", __FUNCTION__,
+                    _mesa_get_format_name(format));
+      return;
+   }
+}
 
 /**
  * Unpack a 2D rect of pixels returning float RGBA colors.
diff --git a/mesalib/src/mesa/main/format_unpack.h b/mesalib/src/mesa/main/format_unpack.h
index a8a829c88..0d13a2d39 100644
--- a/mesalib/src/mesa/main/format_unpack.h
+++ b/mesalib/src/mesa/main/format_unpack.h
@@ -29,12 +29,20 @@ _mesa_unpack_rgba_row(gl_format format, GLuint n,
                       const void *src, GLfloat dst[][4]);
 
 
+void
+_mesa_unpack_int_rgba_row(gl_format format, GLuint n,
+			  const void *src, GLuint dst[][4]);
+
 extern void
 _mesa_unpack_rgba_block(gl_format format,
                         const void *src, GLint srcRowStride,
                         GLfloat dst[][4], GLint dstRowStride,
                         GLuint x, GLuint y, GLuint width, GLuint height);
 
+extern void
+_mesa_unpack_uint_rgba_row(gl_format format, GLuint n,
+			   const void *src, GLuint dst[][4]);
+
 
 extern void
 _mesa_unpack_float_z_row(gl_format format, GLuint n,
diff --git a/mesalib/src/mesa/main/mtypes.h b/mesalib/src/mesa/main/mtypes.h
index 58dc9af0f..adcbaeb19 100644
--- a/mesalib/src/mesa/main/mtypes.h
+++ b/mesalib/src/mesa/main/mtypes.h
@@ -1824,6 +1824,16 @@ struct prog_instruction;
 struct gl_program_parameter_list;
 struct gl_uniform_list;
 
+/** Post-link transform feedback info. */
+struct gl_transform_feedback_info {
+   unsigned NumOutputs;
+
+   struct {
+      unsigned OutputRegister;
+      unsigned OutputBuffer;
+      unsigned NumComponents;
+   } Outputs[MAX_PROGRAM_OUTPUTS];
+};
 
 /**
  * Base class for any kind of program object
@@ -2206,6 +2216,9 @@ struct gl_shader_program
       GLchar **VaryingNames;  /**< Array [NumVarying] of char * */
    } TransformFeedback;
 
+   /** Post-link transform feedback info. */
+   struct gl_transform_feedback_info LinkedTransformFeedback;
+
    /** Geometry shader state - copied into gl_geometry_program at link time */
    struct {
       GLint VerticesOut;
diff --git a/mesalib/src/mesa/swrast/s_readpix.c b/mesalib/src/mesa/swrast/s_readpix.c
index 50422dbd5..54f42db02 100644
--- a/mesalib/src/mesa/swrast/s_readpix.c
+++ b/mesalib/src/mesa/swrast/s_readpix.c
@@ -236,7 +236,10 @@ slow_read_rgba_pixels( struct gl_context *ctx,
 		       GLbitfield transferOps )
 {
    struct gl_renderbuffer *rb = ctx->ReadBuffer->_ColorReadBuffer;
-   GLfloat rgba[MAX_WIDTH][4];
+   union {
+      float f[MAX_WIDTH][4];
+      unsigned int i[MAX_WIDTH][4];
+   } rgba;
    GLubyte *dst, *map;
    int dstStride, stride, j;
 
@@ -248,11 +251,15 @@ slow_read_rgba_pixels( struct gl_context *ctx,
 			       &map, &stride);
 
    for (j = 0; j < height; j++) {
-      _mesa_unpack_rgba_row(_mesa_get_srgb_format_linear(rb->Format),
-			    width, map, rgba);
-      _mesa_pack_rgba_span_float(ctx, width, rgba, format, type, dst,
-				 packing, transferOps);
-
+      if (_mesa_is_integer_format(format)) {
+	 _mesa_unpack_int_rgba_row(rb->Format, width, map, rgba.i);
+	 _mesa_pack_rgba_span_int(ctx, width, rgba.i, format, type, dst);
+      } else {
+	 _mesa_unpack_rgba_row(_mesa_get_srgb_format_linear(rb->Format),
+			       width, map, rgba.f);
+	 _mesa_pack_rgba_span_float(ctx, width, rgba.f, format, type, dst,
+				    packing, transferOps);
+      }
       dst += dstStride;
       map += stride;
    }