tests/graw: Add a bunch of tests.

These were rotting in an internal branch, but contain nothing confidential,
and would be much more useful if kept up-to-date with latest gallium
interface changes.

Several authors including Keith Whitwell, Zack Rusin, and Brian Paul.

1 files changed, 226 insertions, 0 deletions

diff --git a/src/gallium/tests/graw/tex-swizzle.c b/src/gallium/tests/graw/tex-swizzle.c
new file mode 100644
index 00000000000..80a96087e78
--- /dev/null
+++ b/src/gallium/tests/graw/tex-swizzle.c
@@ -0,0 +1,226 @@
+/* Test texture swizzles */
+
+#include <stdio.h>
+
+#include "graw_util.h"
+
+
+static struct graw_info info;
+
+static struct pipe_resource *texture = NULL;
+static struct pipe_sampler_view *sv = NULL;
+static void *sampler = NULL;
+
+static const int WIDTH = 300;
+static const int HEIGHT = 300;
+
+struct vertex {
+   float position[4];
+   float color[4];
+};
+
+static struct vertex vertices[] =
+{
+   { { 0.9, -0.9, 0.0, 1.0 },
+     { 1, 0, 0, 1 } },
+
+   { { 0.9,  0.9, 0.0, 1.0 },
+     { 1, 1, 0, 1 } },
+
+   { {-0.9,  0.9, 0.0, 1.0 },
+     { 0, 1, 0, 1 } },
+
+   { {-0.9,  -0.9, 0.0, 1.0 },
+     { 0, 0, 0, 1 } },
+};
+
+
+static void set_vertices(void)
+{
+   struct pipe_vertex_element ve[2];
+   struct pipe_vertex_buffer vbuf;
+   void *handle;
+
+   memset(ve, 0, sizeof ve);
+
+   ve[0].src_offset = Offset(struct vertex, position);
+   ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+   ve[1].src_offset = Offset(struct vertex, color);
+   ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+
+   handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
+   info.ctx->bind_vertex_elements_state(info.ctx, handle);
+
+
+   vbuf.stride = sizeof(struct vertex);
+   vbuf.buffer_offset = 0;
+   vbuf.buffer = info.screen->user_buffer_create(info.screen,
+                                            vertices,
+                                            sizeof(vertices),
+                                            PIPE_BIND_VERTEX_BUFFER);
+
+   info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf);
+}
+
+static void set_vertex_shader(void)
+{
+   void *handle;
+   const char *text =
+      "VERT\n"
+      "DCL IN[0]\n"
+      "DCL IN[1]\n"
+      "DCL OUT[0], POSITION\n"
+      "DCL OUT[1], GENERIC[0]\n"
+      "  0: MOV OUT[1], IN[1]\n"
+      "  1: MOV OUT[0], IN[0]\n"
+      "  2: END\n";
+
+   handle = graw_parse_vertex_shader(info.ctx, text);
+   info.ctx->bind_vs_state(info.ctx, handle);
+}
+
+static void set_fragment_shader(void)
+{
+   void *handle;
+   const char *text =
+      "FRAG\n"
+      "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
+      "DCL OUT[0], COLOR\n"
+      "DCL SAMP[0]\n"
+      "  0: TXP OUT[0], IN[0], SAMP[0], 2D\n"
+      "  2: END\n";
+
+   handle = graw_parse_fragment_shader(info.ctx, text);
+   info.ctx->bind_fs_state(info.ctx, handle);
+}
+
+
+static void draw(void)
+{
+   union pipe_color_union clear_color;
+
+   clear_color.f[0] = 0.5;
+   clear_color.f[1] = 0.5;
+   clear_color.f[2] = 0.5;
+   clear_color.f[3] = 1.0;
+
+   info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
+   util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
+   info.ctx->flush(info.ctx, NULL);
+
+   graw_util_flush_front(&info);
+}
+
+
+
+static void
+init_tex(const unsigned swizzle[4])
+{ 
+#define SIZE 256
+   struct pipe_sampler_view sv_template;
+   ubyte tex2d[SIZE][SIZE][4];
+   int s, t;
+
+   for (s = 0; s < SIZE; s++) {
+      for (t = 0; t < SIZE; t++) {
+         tex2d[t][s][0] = 0;  /*B*/
+         tex2d[t][s][1] = t;  /*G*/
+         tex2d[t][s][2] = s;  /*R*/
+         tex2d[t][s][3] = 1;  /*A*/
+      }
+   }
+
+   texture = graw_util_create_tex2d(&info, SIZE, SIZE, 
+                                    PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
+
+   memset(&sv_template, 0, sizeof sv_template);
+   sv_template.format = texture->format;
+   sv_template.texture = texture;
+   sv_template.swizzle_r = swizzle[0];
+   sv_template.swizzle_g = swizzle[1];
+   sv_template.swizzle_b = swizzle[2];
+   sv_template.swizzle_a = swizzle[3];
+   sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_template);
+   if (sv == NULL)
+      exit(5);
+
+   info.ctx->set_fragment_sampler_views(info.ctx, 1, &sv);
+
+   sampler = graw_util_create_simple_sampler(&info,
+                                             PIPE_TEX_WRAP_REPEAT,
+                                             PIPE_TEX_FILTER_NEAREST);
+
+   info.ctx->bind_fragment_sampler_states(info.ctx, 1, &sampler);
+#undef SIZE
+}
+
+
+static void
+init(const unsigned swizzle[4])
+{
+   if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
+      exit(1);
+
+   graw_util_default_state(&info, FALSE);
+   
+   graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 10000);
+
+   init_tex(swizzle);
+
+   set_vertices();
+   set_vertex_shader();
+   set_fragment_shader();
+}
+
+
+static unsigned
+char_to_swizzle(char c)
+{
+   switch (c) {
+   case 'r':
+      return PIPE_SWIZZLE_RED;
+   case 'g':
+      return PIPE_SWIZZLE_GREEN;
+   case 'b':
+      return PIPE_SWIZZLE_BLUE;
+   case 'a':
+      return PIPE_SWIZZLE_ALPHA;
+   case '0':
+      return PIPE_SWIZZLE_ZERO;
+   case '1':
+      return PIPE_SWIZZLE_ONE;
+   default:
+      return PIPE_SWIZZLE_RED;
+   }
+}
+
+
+int main(int argc, char *argv[])
+{
+   const char swizzle_names[] = "rgba01";
+   uint swizzle[4];
+   int i;
+
+   swizzle[0] = PIPE_SWIZZLE_RED;
+   swizzle[1] = PIPE_SWIZZLE_GREEN;
+   swizzle[2] = PIPE_SWIZZLE_BLUE;
+   swizzle[3] = PIPE_SWIZZLE_ALPHA;
+
+   for (i = 1; i < argc; i++) {
+      swizzle[i-1] = char_to_swizzle(argv[i][0]);
+   }
+
+   printf("Example:\n");
+   printf("  tex-swizzle r 0 g 1\n");
+   printf("Current swizzle = ");
+   for (i = 0; i < 4; i++) {
+      printf("%c", swizzle_names[swizzle[i]]);
+   }
+   printf("\n");
+
+   init(swizzle);
+
+   graw_set_display_func(draw);
+   graw_main_loop();
+   return 0;
+}