r300-gallium: Add draw_arrays and friends.

This is the last bit of Gallium-side plumbing for drawing things.
From this point on, the only missing parts should be in r3xx-specific
code areas...

1 files changed, 75 insertions, 1 deletions

diff --git a/src/gallium/drivers/r300/r300_context.c b/src/gallium/drivers/r300/r300_context.c
index 7b605ae87a..37dc9e86d6 100644
--- a/src/gallium/drivers/r300/r300_context.c
+++ b/src/gallium/drivers/r300/r300_context.c
@@ -22,6 +22,76 @@
 
 #include "r300_context.h"
 
+static boolean r300_draw_range_elements(struct pipe_context* pipe,
+                                        struct pipe_buffer* indexBuffer,
+                                        unsigned indexSize,
+                                        unsigned minIndex,
+                                        unsigned maxIndex,
+                                        unsigned mode,
+                                        unsigned start,
+                                        unsigned count)
+{
+    struct r300_context* r300 = r300_context(pipe);
+    int i;
+
+    if (r300->dirty_state) {
+        r300_update_derived_state(r300);
+        r300_emit_dirty_state(r300);
+    }
+
+    for (i = 0; i < r300->vertex_buffer_count; i++) {
+        void* buf = pipe_buffer_map(pipe->screen,
+                                    r300->vertex_buffers[i].buffer,
+                                    PIPE_BUFFER_USAGE_CPU_READ);
+        draw_set_mapped_vertex_buffer(r300->draw, i, buf);
+    }
+
+    if (indexBuffer) {
+        void* indices = pipe_buffer_map(pipe->screen, indexBuffer,
+                                        PIPE_BUFFER_USAGE_CPU_READ);
+        draw_set_mapped_element_buffer_range(r300->draw, indexSize,
+                                             minIndex, maxIndex, indices);
+    } else {
+        draw_set_mapped_element_buffer(r300->draw, 0, NULL);
+    }
+
+    draw_set_mapped_constant_buffer(r300->draw,
+            r300->shader_constants[PIPE_SHADER_VERTEX].constants,
+            r300->shader_constants[PIPE_SHADER_VERTEX].user_count *
+                (sizeof(float) * 4));
+
+    /* Abandon all hope, ye who enter here. */
+    draw_arrays(r300->draw, mode, start, count);
+
+    for (i = 0; i < r300->vertex_buffer_count; i++) {
+        pipe_buffer_unmap(pipe->screen, r300->vertex_buffers[i].buffer);
+        draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
+    }
+
+    if (indexBuffer) {
+        pipe_buffer_unmap(pipe->screen, indexBuffer);
+        draw_set_mapped_element_buffer_range(r300->draw, 0, start,
+                                             start + count - 1, NULL);
+    }
+
+    return true;
+}
+
+static boolean r300_draw_elements(struct pipe_context* pipe,
+                                  struct pipe_buffer* indexBuffer,
+                                  unsigned indexSize, unsigned mode,
+                                  unsigned start, unsigned count)
+{
+    return r300_draw_range_elements(pipe, indexBuffer, indexSize, 0, ~0,
+                                    mode, start, count);
+}
+
+static boolean r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
+                                unsigned start, unsigned count)
+{
+    return r300_draw_elements(pipe, NULL, 0, mode, start, count);
+}
+
 static void r300_destroy_context(struct pipe_context* context) {
     struct r300_context* r300 = r300_context(context);
 
@@ -49,8 +119,12 @@ struct pipe_context* r300_create_context(struct pipe_screen* screen,
 
     r300->context.clear = r300_clear;
 
+    r300->context.draw_arrays = r300_draw_arrays;
+    r300->context.draw_elements = r300_draw_elements;
+    r300->context.draw_range_elements = r300_draw_range_elements;
+
     r300->draw = draw_create();
-    /*XXX draw_set_rasterize_stage(r300->draw, r300_draw_swtcl_stage(r300));*/
+    draw_set_rasterize_stage(r300->draw, r300_draw_swtcl_stage(r300));
 
     r300->blend_color_state = CALLOC_STRUCT(r300_blend_color_state);
     r300->scissor_state = CALLOC_STRUCT(r300_scissor_state);