Mesa (master): graw: add a test showing the new sampling scheme in action
Zack Rusin
zack at kemper.freedesktop.org
Mon Jan 24 22:49:14 UTC 2011
Module: Mesa
Branch: master
Commit: 3d9138781ddafb54105db125e270eefc8444992a
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=3d9138781ddafb54105db125e270eefc8444992a
Author: Zack Rusin <zackr at vmware.com>
Date: Mon Jan 24 17:53:29 2011 -0500
graw: add a test showing the new sampling scheme in action
---
src/gallium/tests/graw/quad-sample.c | 415 ++++++++++++++++++++++++++++++++++
1 files changed, 415 insertions(+), 0 deletions(-)
diff --git a/src/gallium/tests/graw/quad-sample.c b/src/gallium/tests/graw/quad-sample.c
new file mode 100644
index 0000000..d03a2a4
--- /dev/null
+++ b/src/gallium/tests/graw/quad-sample.c
@@ -0,0 +1,415 @@
+/* Display a cleared blue window. This demo has no dependencies on
+ * any utility code, just the graw interface and gallium.
+ */
+
+#include "state_tracker/graw.h"
+#include "pipe/p_screen.h"
+#include "pipe/p_context.h"
+#include "pipe/p_shader_tokens.h"
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+
+#include "util/u_debug.h" /* debug_dump_surface_bmp() */
+#include "util/u_inlines.h"
+#include "util/u_memory.h" /* Offset() */
+#include "util/u_draw_quad.h"
+#include "util/u_box.h"
+
+#include <stdio.h>
+
+enum pipe_format formats[] = {
+ PIPE_FORMAT_R8G8B8A8_UNORM,
+ PIPE_FORMAT_B8G8R8A8_UNORM,
+ PIPE_FORMAT_NONE
+};
+
+static const int WIDTH = 300;
+static const int HEIGHT = 300;
+
+static struct pipe_screen *screen = NULL;
+static struct pipe_context *ctx = NULL;
+static struct pipe_resource *rttex = NULL;
+static struct pipe_resource *samptex = NULL;
+static struct pipe_surface *surf = NULL;
+static struct pipe_sampler_view *sv = NULL;
+static void *sampler = NULL;
+static void *window = NULL;
+
+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_viewport( float x, float y,
+ float width, float height,
+ float near, float far)
+{
+ float z = far;
+ float half_width = (float)width / 2.0f;
+ float half_height = (float)height / 2.0f;
+ float half_depth = ((float)far - (float)near) / 2.0f;
+ struct pipe_viewport_state vp;
+
+ vp.scale[0] = half_width;
+ vp.scale[1] = half_height;
+ vp.scale[2] = half_depth;
+ vp.scale[3] = 1.0f;
+
+ vp.translate[0] = half_width + x;
+ vp.translate[1] = half_height + y;
+ vp.translate[2] = half_depth + z;
+ vp.translate[3] = 0.0f;
+
+ ctx->set_viewport_state( ctx, &vp );
+}
+
+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 = ctx->create_vertex_elements_state(ctx, 2, ve);
+ ctx->bind_vertex_elements_state(ctx, handle);
+
+
+ vbuf.stride = sizeof( struct vertex );
+ vbuf.max_index = sizeof(vertices) / vbuf.stride;
+ vbuf.buffer_offset = 0;
+ vbuf.buffer = screen->user_buffer_create(screen,
+ vertices,
+ sizeof(vertices),
+ PIPE_BIND_VERTEX_BUFFER);
+
+ ctx->set_vertex_buffers(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(ctx, text);
+ ctx->bind_vs_state(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"
+ "DCL RES[0], 2D, FLOAT\n"
+ " 0: SAMPLE TEMP[0], IN[0], RES[0], SAMP[0]\n"
+ " 1: MOV OUT[0], TEMP[0]\n"
+ " 2: END\n";
+
+ handle = graw_parse_fragment_shader(ctx, text);
+ ctx->bind_fs_state(ctx, handle);
+}
+
+
+static void draw( void )
+{
+ float clear_color[4] = {.5,.5,.5,1};
+
+ ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
+ util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);
+ ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+ graw_save_surface_to_file(ctx, surf, NULL);
+
+ screen->flush_frontbuffer(screen, rttex, 0, 0, window);
+}
+
+#define SIZE 16
+
+static void init_tex( void )
+{
+ struct pipe_sampler_view sv_template;
+ struct pipe_sampler_state sampler_desc;
+ struct pipe_resource templat;
+ struct pipe_box box;
+ ubyte tex2d[SIZE][SIZE][4];
+ int s, t;
+
+#if (SIZE != 2)
+ for (s = 0; s < SIZE; s++) {
+ for (t = 0; t < SIZE; t++) {
+ if (0) {
+ int x = (s ^ t) & 1;
+ tex2d[t][s][0] = (x) ? 0 : 63;
+ tex2d[t][s][1] = (x) ? 0 : 128;
+ tex2d[t][s][2] = 0;
+ tex2d[t][s][3] = 0xff;
+ }
+ else {
+ int x = ((s ^ t) >> 2) & 1;
+ tex2d[t][s][0] = s*255/(SIZE-1);
+ tex2d[t][s][1] = t*255/(SIZE-1);
+ tex2d[t][s][2] = (x) ? 0 : 128;
+ tex2d[t][s][3] = 0xff;
+ }
+ }
+ }
+#else
+ tex2d[0][0][0] = 0;
+ tex2d[0][0][1] = 255;
+ tex2d[0][0][2] = 255;
+ tex2d[0][0][3] = 0;
+
+ tex2d[0][1][0] = 0;
+ tex2d[0][1][1] = 0;
+ tex2d[0][1][2] = 255;
+ tex2d[0][1][3] = 255;
+
+ tex2d[1][0][0] = 255;
+ tex2d[1][0][1] = 255;
+ tex2d[1][0][2] = 0;
+ tex2d[1][0][3] = 255;
+
+ tex2d[1][1][0] = 255;
+ tex2d[1][1][1] = 0;
+ tex2d[1][1][2] = 0;
+ tex2d[1][1][3] = 255;
+#endif
+
+ templat.target = PIPE_TEXTURE_2D;
+ templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
+ templat.width0 = SIZE;
+ templat.height0 = SIZE;
+ templat.depth0 = 1;
+ templat.last_level = 0;
+ templat.nr_samples = 1;
+ templat.bind = PIPE_BIND_SAMPLER_VIEW;
+
+
+ samptex = screen->resource_create(screen,
+ &templat);
+ if (samptex == NULL)
+ exit(4);
+
+ u_box_2d(0,0,SIZE,SIZE, &box);
+
+ ctx->transfer_inline_write(ctx,
+ samptex,
+ 0,
+ PIPE_TRANSFER_WRITE,
+ &box,
+ tex2d,
+ sizeof tex2d[0],
+ sizeof tex2d);
+
+ /* Possibly read back & compare against original data:
+ */
+ if (0)
+ {
+ struct pipe_transfer *t;
+ uint32_t *ptr;
+ t = pipe_get_transfer(ctx, samptex,
+ 0, 0, /* level, layer */
+ PIPE_TRANSFER_READ,
+ 0, 0, SIZE, SIZE); /* x, y, width, height */
+
+ ptr = ctx->transfer_map(ctx, t);
+
+ if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
+ assert(0);
+ exit(9);
+ }
+
+ ctx->transfer_unmap(ctx, t);
+
+ ctx->transfer_destroy(ctx, t);
+ }
+
+ memset(&sv_template, 0, sizeof sv_template);
+ sv_template.format = samptex->format;
+ sv_template.texture = samptex;
+ sv_template.swizzle_r = 0;
+ sv_template.swizzle_g = 1;
+ sv_template.swizzle_b = 2;
+ sv_template.swizzle_a = 3;
+ sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
+ if (sv == NULL)
+ exit(5);
+
+ ctx->set_fragment_sampler_views(ctx, 1, &sv);
+
+
+ memset(&sampler_desc, 0, sizeof sampler_desc);
+ sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
+ sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
+ sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
+ sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
+ sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
+ sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
+ sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
+ sampler_desc.compare_func = 0;
+ sampler_desc.normalized_coords = 1;
+ sampler_desc.max_anisotropy = 0;
+
+ sampler = ctx->create_sampler_state(ctx, &sampler_desc);
+ if (sampler == NULL)
+ exit(6);
+
+ ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
+
+}
+
+static void init( void )
+{
+ struct pipe_framebuffer_state fb;
+ struct pipe_resource templat;
+ struct pipe_surface surf_tmpl;
+ int i;
+
+ /* It's hard to say whether window or screen should be created
+ * first. Different environments would prefer one or the other.
+ *
+ * Also, no easy way of querying supported formats if the screen
+ * cannot be created first.
+ */
+ for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
+ screen = graw_create_window_and_screen(0, 0, 300, 300,
+ formats[i],
+ &window);
+ if (window && screen)
+ break;
+ }
+ if (!screen || !window) {
+ fprintf(stderr, "Unable to create window\n");
+ exit(1);
+ }
+
+ ctx = screen->context_create(screen, NULL);
+ if (ctx == NULL)
+ exit(3);
+
+ templat.target = PIPE_TEXTURE_2D;
+ templat.format = formats[i];
+ templat.width0 = WIDTH;
+ templat.height0 = HEIGHT;
+ templat.depth0 = 1;
+ templat.array_size = 1;
+ templat.last_level = 0;
+ templat.nr_samples = 1;
+ templat.bind = (PIPE_BIND_RENDER_TARGET |
+ PIPE_BIND_DISPLAY_TARGET);
+
+ rttex = screen->resource_create(screen,
+ &templat);
+ if (rttex == NULL)
+ exit(4);
+
+ surf_tmpl.format = templat.format;
+ surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
+ surf_tmpl.u.tex.level = 0;
+ surf_tmpl.u.tex.first_layer = 0;
+ surf_tmpl.u.tex.last_layer = 0;
+ surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
+ if (surf == NULL)
+ exit(5);
+
+ memset(&fb, 0, sizeof fb);
+ fb.nr_cbufs = 1;
+ fb.width = WIDTH;
+ fb.height = HEIGHT;
+ fb.cbufs[0] = surf;
+
+ ctx->set_framebuffer_state(ctx, &fb);
+
+ {
+ struct pipe_blend_state blend;
+ void *handle;
+ memset(&blend, 0, sizeof blend);
+ blend.rt[0].colormask = PIPE_MASK_RGBA;
+ handle = ctx->create_blend_state(ctx, &blend);
+ ctx->bind_blend_state(ctx, handle);
+ }
+
+ {
+ struct pipe_depth_stencil_alpha_state depthstencil;
+ void *handle;
+ memset(&depthstencil, 0, sizeof depthstencil);
+ handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
+ ctx->bind_depth_stencil_alpha_state(ctx, handle);
+ }
+
+ {
+ struct pipe_rasterizer_state rasterizer;
+ void *handle;
+ memset(&rasterizer, 0, sizeof rasterizer);
+ rasterizer.cull_face = PIPE_FACE_NONE;
+ rasterizer.gl_rasterization_rules = 1;
+ handle = ctx->create_rasterizer_state(ctx, &rasterizer);
+ ctx->bind_rasterizer_state(ctx, handle);
+ }
+
+ set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
+
+ init_tex();
+
+ set_vertices();
+ set_vertex_shader();
+ set_fragment_shader();
+}
+
+static void args(int argc, char *argv[])
+{
+ int i;
+
+ for (i = 1; i < argc;) {
+ if (graw_parse_args(&i, argc, argv)) {
+ continue;
+ }
+ exit(1);
+ }
+}
+
+
+int main( int argc, char *argv[] )
+{
+ args(argc, argv);
+ init();
+
+ graw_set_display_func( draw );
+ graw_main_loop();
+ return 0;
+}
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