gallium: added inClipCoords param to st_draw_vertices() to indicate coord system of vertices

Also, export st_make_passthrough_vertex_shader() from st_cb_drawpixels.c

src/mesa/state_tracker/st_cb_clear.c

@@ -251,7 +251,7 @@ draw_quad(GLcontext *ctx,
       verts[i][1][3] = color[3];
    }
 
-   st_draw_vertices(ctx, PIPE_PRIM_QUADS, 4, (float *) verts, 2);
+   st_draw_vertices(ctx, PIPE_PRIM_QUADS, 4, (float *) verts, 2, GL_FALSE);
 }
 
 

src/mesa/state_tracker/st_cb_drawpixels.c

@@ -355,8 +355,8 @@ make_fragment_shader_z(struct st_context *st)
  * Create a simple vertex shader that just passes through the
  * vertex position and texcoord (and optionally, color).
  */
-static struct st_vertex_program *
-make_vertex_shader(struct st_context *st, GLboolean passColor)
+struct st_vertex_program *
+st_make_passthrough_vertex_shader(struct st_context *st, GLboolean passColor)
 {
    /* only make programs once and re-use */
    static struct st_vertex_program *progs[2] = { NULL, NULL };
@@ -572,7 +572,7 @@ draw_quad(GLcontext *ctx, GLfloat x0, GLfloat y0, GLfloat z,
       verts[i][1][3] = 1.0; /*Q*/
    }
 
-   st_draw_vertices(ctx, PIPE_PRIM_QUADS, 4, (float *) verts, 2);
+   st_draw_vertices(ctx, PIPE_PRIM_QUADS, 4, (float *) verts, 2, GL_FALSE);
 }
 
 
@@ -625,7 +625,7 @@ draw_quad_colored(GLcontext *ctx, GLfloat x0, GLfloat y0, GLfloat z,
       verts[i][2][3] = 1.0; /*Q*/
    }
 
-   st_draw_vertices(ctx, PIPE_PRIM_QUADS, 4, (float *) verts, 3);
+   st_draw_vertices(ctx, PIPE_PRIM_QUADS, 4, (float *) verts, 3, GL_FALSE);
 }
 
 
@@ -945,7 +945,7 @@ st_DrawPixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height,
    if (format == GL_DEPTH_COMPONENT) {
       ps = st->state.framebuffer.zsbuf;
       stfp = make_fragment_shader_z(ctx->st);
-      stvp = make_vertex_shader(ctx->st, GL_TRUE);
+      stvp = st_make_passthrough_vertex_shader(ctx->st, GL_TRUE);
       color = ctx->Current.RasterColor;
    }
    else if (format == GL_STENCIL_INDEX) {
@@ -956,7 +956,7 @@ st_DrawPixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height,
    else {
       ps = st->state.framebuffer.cbufs[0];
       stfp = combined_drawpix_fragment_program(ctx);
-      stvp = make_vertex_shader(ctx->st, GL_FALSE);
+      stvp = st_make_passthrough_vertex_shader(ctx->st, GL_FALSE);
       color = NULL;
    }
 
@@ -1111,7 +1111,7 @@ st_Bitmap(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height,
    struct st_context *st = ctx->st;
    struct pipe_texture *pt;
 
-   stvp = make_vertex_shader(ctx->st, GL_TRUE);
+   stvp = st_make_passthrough_vertex_shader(ctx->st, GL_TRUE);
    stfp = combined_bitmap_fragment_program(ctx);
 
    st_validate_state(st);
@@ -1229,13 +1229,13 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
       rbRead = st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
       color = NULL;
       stfp = combined_drawpix_fragment_program(ctx);
-      stvp = make_vertex_shader(ctx->st, GL_FALSE);
+      stvp = st_make_passthrough_vertex_shader(ctx->st, GL_FALSE);
    }
    else {
       rbRead = st_renderbuffer(ctx->ReadBuffer->_DepthBuffer);
       color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0];
       stfp = make_fragment_shader_z(ctx->st);
-      stvp = make_vertex_shader(ctx->st, GL_TRUE);
+      stvp = st_make_passthrough_vertex_shader(ctx->st, GL_TRUE);
    }
 
    psRead = rbRead->surface;

src/mesa/state_tracker/st_cb_drawpixels.h

@@ -30,6 +30,10 @@
 #define ST_CB_DRAWPIXELS_H
 
 
+extern struct st_vertex_program *
+st_make_passthrough_vertex_shader(struct st_context *st, GLboolean passColor);
+
+
 extern void st_init_drawpixels_functions(struct dd_function_table *functions);
 
 

src/mesa/state_tracker/st_draw.c

@@ -354,7 +354,8 @@ st_draw_vbo(GLcontext *ctx,
 void 
 st_draw_vertices(GLcontext *ctx, unsigned prim,
                  unsigned numVertex, float *verts,
-                 unsigned numAttribs)
+                 unsigned numAttribs,
+                 GLboolean inClipCoords)
 {
    const float width = ctx->DrawBuffer->Width;
    const float height = ctx->DrawBuffer->Height;
@@ -367,14 +368,16 @@ st_draw_vertices(GLcontext *ctx, unsigned prim,
 
    assert(numAttribs > 0);
 
-   /* convert to clip coords */
-   for (i = 0; i < numVertex; i++) {
-      float x = verts[i * numAttribs * 4 + 0];
-      float y = verts[i * numAttribs * 4 + 1];
-      x = x / width * 2.0 - 1.0;
-      y = y / height * 2.0 - 1.0;
-      verts[i * numAttribs * 4 + 0] = x;
-      verts[i * numAttribs * 4 + 1] = y;
+   if (!inClipCoords) {
+      /* convert to clip coords */
+      for (i = 0; i < numVertex; i++) {
+         float x = verts[i * numAttribs * 4 + 0];
+         float y = verts[i * numAttribs * 4 + 1];
+         x = x / width * 2.0 - 1.0;
+         y = y / height * 2.0 - 1.0;
+         verts[i * numAttribs * 4 + 0] = x;
+         verts[i * numAttribs * 4 + 1] = y;
+      }
    }
 
    /* XXX create one-time */

src/mesa/state_tracker/st_draw.h

@@ -62,7 +62,8 @@ st_feedback_draw_vbo(GLcontext *ctx,
 void 
 st_draw_vertices(GLcontext *ctx, unsigned prim,
                  unsigned numVertex, float *verts,
-                 unsigned numAttribs);
+                 unsigned numAttribs,
+                 GLboolean inClipCoords);
 
 
 #endif