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, 224 insertions, 0 deletions

diff --git a/src/gallium/tests/graw/tex-srgb.c b/src/gallium/tests/graw/tex-srgb.c
new file mode 100644
index 00000000000..8eaf0bd1ec7
--- /dev/null
+++ b/src/gallium/tests/graw/tex-srgb.c
@@ -0,0 +1,224 @@
+/* Test sRGB texturing.
+ */
+
+#include "graw_util.h"
+
+
+static const int WIDTH = 600;
+static const int HEIGHT = 300;
+
+static struct graw_info info;
+
+static struct pipe_resource *texture;
+static struct pipe_sampler_view *linear_sv, *srgb_sv;
+
+
+struct vertex {
+   float position[4];
+   float color[4];
+};
+
+static struct vertex vertices1[] =
+{
+   { { -0.1, -0.9, 0.0, 1.0 },
+     { 1, 1, 0, 1 } },
+
+   { { -0.1,  0.9, 0.0, 1.0 },
+     { 1, 0, 0, 1 } },
+
+   { {-0.9,  0.9, 0.0, 1.0 },
+     { 0, 0, 0, 1 } },
+
+   { {-0.9,  -0.9, 0.0, 1.0 },
+     { 0, 1, 0, 1 } },
+};
+
+
+static struct vertex vertices2[] =
+{
+   { { 0.9, -0.9, 0.0, 1.0 },
+     { 1, 1, 0, 1 } },
+
+   { { 0.9,  0.9, 0.0, 1.0 },
+     { 1, 0, 0, 1 } },
+
+   { { 0.1,  0.9, 0.0, 1.0 },
+     { 0, 0, 0, 1 } },
+
+   { { 0.1,  -0.9, 0.0, 1.0 },
+     { 0, 1, 0, 1 } },
+};
+
+
+
+
+static void
+set_vertices(struct vertex *verts, unsigned num_verts)
+{
+   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,
+                                                 verts,
+                                                 num_verts *sizeof(struct vertex),
+                                                 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 TEMP[0]\n"
+      "DCL SAMP[0]\n"
+      "  0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
+      "  1: MOV OUT[0], TEMP[0]\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);
+
+   info.ctx->set_fragment_sampler_views(info.ctx, 1, &linear_sv);
+   set_vertices(vertices1, 4);
+   util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
+
+   info.ctx->set_fragment_sampler_views(info.ctx, 1, &srgb_sv);
+   set_vertices(vertices2, 4);
+   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( void )
+{ 
+#define SIZE 64
+   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;
+         tex2d[t][s][1] = s * 255 / SIZE;
+         tex2d[t][s][2] = t * 255 / SIZE;
+         tex2d[t][s][3] = 255;
+      }
+   }
+
+   texture = graw_util_create_tex2d(&info, SIZE, SIZE, 
+                                    PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
+
+   {
+      void *sampler;
+      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);
+   }
+
+   /* linear sampler view */
+   {
+      struct pipe_sampler_view sv_temp;
+      memset(&sv_temp, 0, sizeof sv_temp);
+      sv_temp.format = PIPE_FORMAT_B8G8R8A8_UNORM;
+      sv_temp.texture = texture;
+      sv_temp.swizzle_r = PIPE_SWIZZLE_RED;
+      sv_temp.swizzle_g = PIPE_SWIZZLE_GREEN;
+      sv_temp.swizzle_b = PIPE_SWIZZLE_BLUE;
+      sv_temp.swizzle_a = PIPE_SWIZZLE_ALPHA;
+      linear_sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_temp);
+      if (linear_sv == NULL)
+         exit(0);
+   }
+
+   /* srgb sampler view */
+   {
+      struct pipe_sampler_view sv_temp;
+      memset(&sv_temp, 0, sizeof sv_temp);
+      sv_temp.format = PIPE_FORMAT_B8G8R8A8_SRGB;
+      sv_temp.texture = texture;
+      sv_temp.swizzle_r = PIPE_SWIZZLE_RED;
+      sv_temp.swizzle_g = PIPE_SWIZZLE_GREEN;
+      sv_temp.swizzle_b = PIPE_SWIZZLE_BLUE;
+      sv_temp.swizzle_a = PIPE_SWIZZLE_ALPHA;
+      srgb_sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_temp);
+      if (srgb_sv == NULL)
+         exit(0);
+   }
+#undef SIZE
+}
+
+static void init( void )
+{
+   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();
+
+   set_vertex_shader();
+   set_fragment_shader();
+}
+
+
+int main( int argc, char *argv[] )
+{
+   init();
+
+   graw_set_display_func( draw );
+   graw_main_loop();
+   return 0;
+}