src/gallium/tests/graw/fs-fragcoord.c - platform/external/mesa3d - Git at Google

 /* Test the TGSI_SEMANTIC_POSITION fragment shader input.
  * Plus properties for upper-left vs. lower-left origin and
  * center integer vs. half-integer;
  */

 #include <stdio.h>

 #include "graw_util.h"


 static int width = 300;
 static int height = 300;

 static struct graw_info info;

 struct vertex {
    float position[4];
    float color[4];
 };

 /* Note: the upper-left vertex is pushed to the left a bit to
  * make sure we can spot upside-down rendering.
  */
 static struct vertex vertices[] =
 {
    {
       {-0.95, -0.95, 0.5, 1.0 },
       { 0, 0, 0, 1 }
    },

    {
       { 0.85, -0.95, 0.5, 1.0 },
       { 0, 0, 0, 1 }
    },

    {
       { 0.95,  0.95, 0.5, 1.0 },
       { 0, 0, 0, 1 }
    },

    {
       {-0.95,  0.95, 0.5, 1.0 },
       { 0, 0, 0, 1 }
    }
 };

 #define NUM_VERTS (sizeof(vertices) / sizeof(vertices[0]))


 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 = pipe_buffer_create_with_data(info.ctx,
                                               PIPE_BIND_VERTEX_BUFFER,
                                               PIPE_USAGE_STATIC,
                                               sizeof(vertices),
                                               vertices);

    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[0], IN[0]\n"
       "  1: MOV OUT[1], IN[1]\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(int mode)
 {
    void *handle;

    const char *origin_upper_left_text =
       "FRAG\n"
       "PROPERTY FS_COORD_ORIGIN UPPER_LEFT\n"  /* upper-left = black corner */
       "DCL IN[0], POSITION, LINEAR\n"
       "DCL OUT[0], COLOR\n"
       "DCL TEMP[0]\n"
       "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n"
       "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n"
       " 0: MOV TEMP[0], IN[0] \n"
       " 1: MOV TEMP[0].zw, IMM[1].xxxx \n"
       " 2: MUL OUT[0], TEMP[0], IMM[0] \n"
       " 3: END\n";

    const char *origin_lower_left_text =
       "FRAG\n"
       "PROPERTY FS_COORD_ORIGIN LOWER_LEFT\n"  /* lower-left = black corner */
       "DCL IN[0], POSITION, LINEAR\n"
       "DCL OUT[0], COLOR\n"
       "DCL TEMP[0]\n"
       "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n"
       "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n"
       " 0: MOV TEMP[0], IN[0] \n"
       " 1: MOV TEMP[0].zw, IMM[1].xxxx \n"
       " 2: MUL OUT[0], TEMP[0], IMM[0] \n"
       " 3: END\n";

    /* Test fragcoord center integer vs. half integer */
    const char *center_integer_text =
       "FRAG\n"
       "PROPERTY FS_COORD_PIXEL_CENTER INTEGER \n"       /* pixels are black */
       "DCL IN[0], POSITION, LINEAR \n"
       "DCL OUT[0], COLOR \n"
       "DCL TEMP[0] \n"
       "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n"
       "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n"
       "0: FRC TEMP[0], IN[0]  \n"
       "1: MOV TEMP[0].zw, IMM[1].xxxx \n"
       "2: MOV OUT[0], TEMP[0] \n"
       "3: END \n";

    const char *center_half_integer_text =
       "FRAG\n"
       "PROPERTY FS_COORD_PIXEL_CENTER HALF_INTEGER \n"  /* pixels are olive colored */
       "DCL IN[0], POSITION, LINEAR \n"
       "DCL OUT[0], COLOR \n"
       "DCL TEMP[0] \n"
       "IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n"
       "IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n"
       "0: FRC TEMP[0], IN[0]  \n"
       "1: MOV TEMP[0].zw, IMM[1].xxxx \n"
       "2: MOV OUT[0], TEMP[0] \n"
       "3: END \n";

    const char *text;

    if (mode == 0)
       text = origin_upper_left_text;
    else if (mode == 1)
       text = origin_lower_left_text;
    else if (mode == 2)
       text = center_integer_text;
    else
       text = center_half_integer_text;

    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] = 0.25;
    clear_color.f[1] = 0.25;
    clear_color.f[2] = 0.25;
    clear_color.f[3] = 1.0;

    info.ctx->clear(info.ctx,
               PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL,
               &clear_color, 1.0, 0);
    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
    info.ctx->flush(info.ctx, NULL);

 #if 0
    /* At the moment, libgraw leaks out/makes available some of the
     * symbols from gallium/auxiliary, including these debug helpers.
     * Will eventually want to bless some of these paths, and lock the
     * others down so they aren't accessible from test programs.
     *
     * This currently just happens to work on debug builds - a release
     * build will probably fail to link here:
     */
    debug_dump_surface_bmp(info.ctx, "result.bmp", surf);
 #endif

    graw_util_flush_front(&info);
 }


 #if 0
 static void
 resize(int w, int h)
 {
    width = w;
    height = h;

    set_viewport(0, 0, width, height, 30, 1000);
 }
 #endif


 static void
 init(int mode)
 {
    if (!graw_util_create_window(&info, width, height, 1, TRUE))
       exit(1);

    graw_util_default_state(&info, TRUE);

    graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0);

    set_vertices();
    set_vertex_shader();
    set_fragment_shader(mode);
 }


 int
 main(int argc, char *argv[])
 {
    int mode = argc > 1 ? atoi(argv[1]) : 0;

    switch (mode) {
    default:
    case 0:
       printf("frag coord origin upper-left (lower-left = black)\n");
       break;
    case 1:
       printf("frag coord origin lower-left (upper-left = black)\n");
       break;
    case 2:
       printf("frag coord center integer (all pixels black)\n");
       break;
    case 3:
       printf("frag coord center half-integer (all pixels olive color)\n");
       break;
    }

    init(mode);

    graw_set_display_func(draw);
    /*graw_set_reshape_func(resize);*/
    graw_main_loop();
    return 0;
 }
	/* Test the TGSI_SEMANTIC_POSITION fragment shader input.
	* Plus properties for upper-left vs. lower-left origin and
	* center integer vs. half-integer;
	*/

	#include <stdio.h>

	#include "graw_util.h"


	static int width = 300;
	static int height = 300;

	static struct graw_info info;

	struct vertex {
	float position[4];
	float color[4];
	};

	/* Note: the upper-left vertex is pushed to the left a bit to
	* make sure we can spot upside-down rendering.
	*/
	static struct vertex vertices[] =
	{
	{
	{-0.95, -0.95, 0.5, 1.0 },
	{ 0, 0, 0, 1 }
	},

	{
	{ 0.85, -0.95, 0.5, 1.0 },
	{ 0, 0, 0, 1 }
	},

	{
	{ 0.95, 0.95, 0.5, 1.0 },
	{ 0, 0, 0, 1 }
	},

	{
	{-0.95, 0.95, 0.5, 1.0 },
	{ 0, 0, 0, 1 }
	}
	};

	#define NUM_VERTS (sizeof(vertices) / sizeof(vertices[0]))


	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 = pipe_buffer_create_with_data(info.ctx,
	PIPE_BIND_VERTEX_BUFFER,
	PIPE_USAGE_STATIC,
	sizeof(vertices),
	vertices);

	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[0], IN[0]\n"
	" 1: MOV OUT[1], IN[1]\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(int mode)
	{
	void *handle;

	const char *origin_upper_left_text =
	"FRAG\n"
	"PROPERTY FS_COORD_ORIGIN UPPER_LEFT\n" /* upper-left = black corner */
	"DCL IN[0], POSITION, LINEAR\n"
	"DCL OUT[0], COLOR\n"
	"DCL TEMP[0]\n"
	"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n"
	"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n"
	" 0: MOV TEMP[0], IN[0] \n"
	" 1: MOV TEMP[0].zw, IMM[1].xxxx \n"
	" 2: MUL OUT[0], TEMP[0], IMM[0] \n"
	" 3: END\n";

	const char *origin_lower_left_text =
	"FRAG\n"
	"PROPERTY FS_COORD_ORIGIN LOWER_LEFT\n" /* lower-left = black corner */
	"DCL IN[0], POSITION, LINEAR\n"
	"DCL OUT[0], COLOR\n"
	"DCL TEMP[0]\n"
	"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n"
	"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n"
	" 0: MOV TEMP[0], IN[0] \n"
	" 1: MOV TEMP[0].zw, IMM[1].xxxx \n"
	" 2: MUL OUT[0], TEMP[0], IMM[0] \n"
	" 3: END\n";

	/* Test fragcoord center integer vs. half integer */
	const char *center_integer_text =
	"FRAG\n"
	"PROPERTY FS_COORD_PIXEL_CENTER INTEGER \n" /* pixels are black */
	"DCL IN[0], POSITION, LINEAR \n"
	"DCL OUT[0], COLOR \n"
	"DCL TEMP[0] \n"
	"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n"
	"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n"
	"0: FRC TEMP[0], IN[0] \n"
	"1: MOV TEMP[0].zw, IMM[1].xxxx \n"
	"2: MOV OUT[0], TEMP[0] \n"
	"3: END \n";

	const char *center_half_integer_text =
	"FRAG\n"
	"PROPERTY FS_COORD_PIXEL_CENTER HALF_INTEGER \n" /* pixels are olive colored */
	"DCL IN[0], POSITION, LINEAR \n"
	"DCL OUT[0], COLOR \n"
	"DCL TEMP[0] \n"
	"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n"
	"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n"
	"0: FRC TEMP[0], IN[0] \n"
	"1: MOV TEMP[0].zw, IMM[1].xxxx \n"
	"2: MOV OUT[0], TEMP[0] \n"
	"3: END \n";

	const char *text;

	if (mode == 0)
	text = origin_upper_left_text;
	else if (mode == 1)
	text = origin_lower_left_text;
	else if (mode == 2)
	text = center_integer_text;
	else
	text = center_half_integer_text;

	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] = 0.25;
	clear_color.f[1] = 0.25;
	clear_color.f[2] = 0.25;
	clear_color.f[3] = 1.0;

	info.ctx->clear(info.ctx,
	PIPE_CLEAR_COLOR \| PIPE_CLEAR_DEPTHSTENCIL,
	&clear_color, 1.0, 0);
	util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS);
	info.ctx->flush(info.ctx, NULL);

	#if 0
	/* At the moment, libgraw leaks out/makes available some of the
	* symbols from gallium/auxiliary, including these debug helpers.
	* Will eventually want to bless some of these paths, and lock the
	* others down so they aren't accessible from test programs.
	*
	* This currently just happens to work on debug builds - a release
	* build will probably fail to link here:
	*/
	debug_dump_surface_bmp(info.ctx, "result.bmp", surf);
	#endif

	graw_util_flush_front(&info);
	}


	#if 0
	static void
	resize(int w, int h)
	{
	width = w;
	height = h;

	set_viewport(0, 0, width, height, 30, 1000);
	}
	#endif


	static void
	init(int mode)
	{
	if (!graw_util_create_window(&info, width, height, 1, TRUE))
	exit(1);

	graw_util_default_state(&info, TRUE);

	graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0);

	set_vertices();
	set_vertex_shader();
	set_fragment_shader(mode);
	}


	int
	main(int argc, char *argv[])
	{
	int mode = argc > 1 ? atoi(argv[1]) : 0;

	switch (mode) {
	default:
	case 0:
	printf("frag coord origin upper-left (lower-left = black)\n");
	break;
	case 1:
	printf("frag coord origin lower-left (upper-left = black)\n");
	break;
	case 2:
	printf("frag coord center integer (all pixels black)\n");
	break;
	case 3:
	printf("frag coord center half-integer (all pixels olive color)\n");
	break;
	}

	init(mode);

	graw_set_display_func(draw);
	/graw_set_reshape_func(resize);/
	graw_main_loop();
	return 0;
	}