intel: Put the constant texcoords used in metaops into a vbo.

Make this be its own function for setup/teardown of the binding of these
texcoords.  No performance difference in the engine demo (I just felt dirty
not using a VBO for this), and I think it should be more resilient to
interference from current GL state.

5 files changed, 102 insertions, 40 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_context.h b/src/mesa/drivers/dri/intel/intel_context.h
index d798225ddd..f385027596 100644
--- a/src/mesa/drivers/dri/intel/intel_context.h
+++ b/src/mesa/drivers/dri/intel/intel_context.h
@@ -161,12 +161,20 @@ struct intel_context
    struct {
       struct gl_fragment_program *bitmap_fp;
       struct gl_vertex_program *passthrough_vp;
+      struct gl_buffer_object *texcoord_vbo;
 
       struct gl_fragment_program *saved_fp;
       GLboolean saved_fp_enable;
       struct gl_vertex_program *saved_vp;
       GLboolean saved_vp_enable;
 
+      GLboolean saved_texcoord_enable;
+      struct gl_buffer_object *saved_array_vbo, *saved_texcoord_vbo;
+      GLenum saved_texcoord_type;
+      GLsizei saved_texcoord_size, saved_texcoord_stride;
+      const void *saved_texcoord_ptr;
+      int saved_active_texture;
+
       GLint saved_vp_x, saved_vp_y;
       GLsizei saved_vp_width, saved_vp_height;
       GLenum saved_matrix_mode;
diff --git a/src/mesa/drivers/dri/intel/intel_pixel.c b/src/mesa/drivers/dri/intel/intel_pixel.c
index fc0ac0b79c..cbdda6b1f9 100644
--- a/src/mesa/drivers/dri/intel/intel_pixel.c
+++ b/src/mesa/drivers/dri/intel/intel_pixel.c
@@ -27,9 +27,12 @@
 
 #include "main/enums.h"
 #include "main/state.h"
+#include "main/bufferobj.h"
 #include "main/context.h"
 #include "main/enable.h"
 #include "main/matrix.h"
+#include "main/texstate.h"
+#include "main/varray.h"
 #include "main/viewport.h"
 #include "swrast/swrast.h"
 #include "shader/arbprogram.h"
@@ -334,6 +337,85 @@ intel_meta_restore_fragment_program(struct intel_context *intel)
       _mesa_Disable(GL_FRAGMENT_PROGRAM_ARB);
 }
 
+static const float default_texcoords[4][2] = { { 0.0, 0.0 },
+					       { 1.0, 0.0 },
+					       { 1.0, 1.0 },
+					       { 0.0, 1.0 } };
+
+void
+intel_meta_set_default_texrect(struct intel_context *intel)
+{
+   GLcontext *ctx = &intel->ctx;
+   struct gl_client_array *old_texcoord_array;
+
+   intel->meta.saved_active_texture = ctx->Texture.CurrentUnit;
+   if (intel->meta.saved_array_vbo == NULL) {
+      _mesa_reference_buffer_object(ctx, &intel->meta.saved_array_vbo,
+				    ctx->Array.ArrayBufferObj);
+   }
+
+   old_texcoord_array = &ctx->Array.ArrayObj->TexCoord[0];
+   intel->meta.saved_texcoord_type = old_texcoord_array->Type;
+   intel->meta.saved_texcoord_size = old_texcoord_array->Size;
+   intel->meta.saved_texcoord_stride = old_texcoord_array->Stride;
+   intel->meta.saved_texcoord_enable = old_texcoord_array->Enabled;
+   intel->meta.saved_texcoord_ptr = old_texcoord_array->Ptr;
+   _mesa_reference_buffer_object(ctx, &intel->meta.saved_texcoord_vbo,
+				 old_texcoord_array->BufferObj);
+
+   _mesa_ClientActiveTextureARB(GL_TEXTURE0);
+
+   if (intel->meta.texcoord_vbo == NULL) {
+      GLuint vbo_name;
+
+      _mesa_GenBuffersARB(1, &vbo_name);
+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, vbo_name);
+      _mesa_BufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(default_texcoords),
+			  default_texcoords, GL_STATIC_DRAW_ARB);
+      _mesa_reference_buffer_object(ctx, &intel->meta.texcoord_vbo,
+				    ctx->Array.ArrayBufferObj);
+   } else {
+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
+			  intel->meta.texcoord_vbo->Name);
+   }
+   _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), NULL);
+
+   _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
+}
+
+void
+intel_meta_restore_texcoords(struct intel_context *intel)
+{
+   GLcontext *ctx = &intel->ctx;
+
+   /* Restore the old TexCoordPointer */
+   if (intel->meta.saved_texcoord_vbo) {
+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
+			  intel->meta.saved_texcoord_vbo->Name);
+      _mesa_reference_buffer_object(ctx, &intel->meta.saved_texcoord_vbo, NULL);
+   } else {
+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
+   }
+
+   _mesa_TexCoordPointer(intel->meta.saved_texcoord_size,
+			 intel->meta.saved_texcoord_type,
+			 intel->meta.saved_texcoord_stride,
+			 intel->meta.saved_texcoord_ptr);
+   if (!intel->meta.saved_texcoord_enable)
+      _mesa_Disable(GL_TEXTURE_COORD_ARRAY);
+
+   _mesa_ClientActiveTextureARB(GL_TEXTURE0 +
+				intel->meta.saved_active_texture);
+
+   if (intel->meta.saved_array_vbo) {
+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB,
+			  intel->meta.saved_array_vbo->Name);
+      _mesa_reference_buffer_object(ctx, &intel->meta.saved_array_vbo, NULL);
+   } else {
+      _mesa_BindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
+   }
+}
+
 void
 intelInitPixelFuncs(struct dd_function_table *functions)
 {
@@ -355,5 +437,6 @@ intel_free_pixel_state(struct intel_context *intel)
 
    _mesa_reference_vertprog(ctx, &intel->meta.passthrough_vp, NULL);
    _mesa_reference_fragprog(ctx, &intel->meta.bitmap_fp, NULL);
+   _mesa_reference_buffer_object(ctx, &intel->meta.texcoord_vbo, NULL);
 }
 
diff --git a/src/mesa/drivers/dri/intel/intel_pixel.h b/src/mesa/drivers/dri/intel/intel_pixel.h
index cb41fa182c..6acf0813c8 100644
--- a/src/mesa/drivers/dri/intel/intel_pixel.h
+++ b/src/mesa/drivers/dri/intel/intel_pixel.h
@@ -40,6 +40,9 @@ void intel_meta_set_fragment_program(struct intel_context *intel,
 				     const char *prog_string);
 void intel_meta_restore_fragment_program(struct intel_context *intel);
 void intel_free_pixel_state(struct intel_context *intel);
+void intel_meta_set_default_texrect(struct intel_context *intel);
+void intel_meta_set_default_texrect(struct intel_context *intel);
+void intel_meta_restore_texcoords(struct intel_context *intel);
 
 GLboolean intel_check_blit_fragment_ops(GLcontext * ctx,
 					GLboolean src_alpha_is_one);
diff --git a/src/mesa/drivers/dri/intel/intel_pixel_bitmap.c b/src/mesa/drivers/dri/intel/intel_pixel_bitmap.c
index 1db7f5594e..b20840b9a0 100644
--- a/src/mesa/drivers/dri/intel/intel_pixel_bitmap.c
+++ b/src/mesa/drivers/dri/intel/intel_pixel_bitmap.c
@@ -360,7 +360,6 @@ intel_texture_bitmap(GLcontext * ctx,
       "END\n";
    GLuint texname;
    GLfloat vertices[4][4];
-   GLfloat texcoords[4][2];
    GLint old_active_texture;
    GLubyte *unpacked_bitmap;
    GLubyte *a8_bitmap;
@@ -485,22 +484,12 @@ intel_texture_bitmap(GLcontext * ctx,
    vertices[3][2] = dst_z;
    vertices[3][3] = 1.0;
 
-   texcoords[0][0] = 0.0;
-   texcoords[0][1] = 0.0;
-   texcoords[1][0] = 1.0;
-   texcoords[1][1] = 0.0;
-   texcoords[2][0] = 1.0;
-   texcoords[2][1] = 1.0;
-   texcoords[3][0] = 0.0;
-   texcoords[3][1] = 1.0;
-
    _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);
-   _mesa_ClientActiveTextureARB(GL_TEXTURE0);
-   _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords);
    _mesa_Enable(GL_VERTEX_ARRAY);
-   _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
+   intel_meta_set_default_texrect(intel);
    CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4));
 
+   intel_meta_restore_texcoords(intel);
    intel_meta_restore_transform(intel);
    intel_meta_restore_fragment_program(intel);
    intel_meta_restore_vertex_program(intel);
diff --git a/src/mesa/drivers/dri/intel/intel_pixel_draw.c b/src/mesa/drivers/dri/intel/intel_pixel_draw.c
index e8d5ac8569..abcdcd5724 100644
--- a/src/mesa/drivers/dri/intel/intel_pixel_draw.c
+++ b/src/mesa/drivers/dri/intel/intel_pixel_draw.c
@@ -70,7 +70,6 @@ intel_texture_drawpixels(GLcontext * ctx,
    struct intel_context *intel = intel_context(ctx);
    GLuint texname;
    GLfloat vertices[4][4];
-   GLfloat texcoords[4][2];
    GLfloat z;
    GLint old_active_texture;
    GLenum internalFormat;
@@ -169,22 +168,13 @@ intel_texture_drawpixels(GLcontext * ctx,
    vertices[3][2] = z;
    vertices[3][3] = 1.0;
 
-   texcoords[0][0] = 0.0;
-   texcoords[0][1] = 0.0;
-   texcoords[1][0] = 1.0;
-   texcoords[1][1] = 0.0;
-   texcoords[2][0] = 1.0;
-   texcoords[2][1] = 1.0;
-   texcoords[3][0] = 0.0;
-   texcoords[3][1] = 1.0;
-
    _mesa_VertexPointer(4, GL_FLOAT, 4 * sizeof(GLfloat), &vertices);
-   _mesa_ClientActiveTextureARB(GL_TEXTURE0);
-   _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords);
    _mesa_Enable(GL_VERTEX_ARRAY);
-   _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
+   intel_meta_set_default_texrect(intel);
+
    CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4));
 
+   intel_meta_restore_texcoords(intel);
    intel_meta_restore_transform(intel);
 
    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);
@@ -208,7 +198,6 @@ intel_stencil_drawpixels(GLcontext * ctx,
    struct intel_context *intel = intel_context(ctx);
    GLuint texname, rb_name, fb_name, old_fb_name;
    GLfloat vertices[4][2];
-   GLfloat texcoords[4][2];
    struct intel_renderbuffer *irb;
    struct intel_renderbuffer *depth_irb;
    struct gl_renderbuffer *rb;
@@ -343,7 +332,6 @@ intel_stencil_drawpixels(GLcontext * ctx,
    _mesa_free(stencil_pixels);
 
    intel_meta_set_passthrough_transform(intel);
-
    vertices[0][0] = x;
    vertices[0][1] = y;
    vertices[1][0] = x + width * ctx->Pixel.ZoomX;
@@ -353,22 +341,13 @@ intel_stencil_drawpixels(GLcontext * ctx,
    vertices[3][0] = x;
    vertices[3][1] = y + height * ctx->Pixel.ZoomY;
 
-   texcoords[0][0] = 0.0;
-   texcoords[0][1] = 0.0;
-   texcoords[1][0] = 1.0;
-   texcoords[1][1] = 0.0;
-   texcoords[2][0] = 1.0;
-   texcoords[2][1] = 1.0;
-   texcoords[3][0] = 0.0;
-   texcoords[3][1] = 1.0;
-
    _mesa_VertexPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &vertices);
-   _mesa_ClientActiveTextureARB(GL_TEXTURE0);
-   _mesa_TexCoordPointer(2, GL_FLOAT, 2 * sizeof(GLfloat), &texcoords);
    _mesa_Enable(GL_VERTEX_ARRAY);
-   _mesa_Enable(GL_TEXTURE_COORD_ARRAY);
+   intel_meta_set_default_texrect(intel);
+
    CALL_DrawArrays(ctx->Exec, (GL_TRIANGLE_FAN, 0, 4));
 
+   intel_meta_restore_texcoords(intel);
    intel_meta_restore_transform(intel);
 
    _mesa_ActiveTextureARB(GL_TEXTURE0_ARB + old_active_texture);