0,0 → 1,278 |
/* Display a cleared blue window. This demo has no dependencies on |
* any utility code, just the graw interface and gallium. |
*/ |
|
#include <stdio.h> |
#include "state_tracker/graw.h" |
#include "pipe/p_screen.h" |
#include "pipe/p_context.h" |
#include "pipe/p_state.h" |
#include "pipe/p_defines.h" |
|
#include "util/u_memory.h" /* Offset() */ |
#include "util/u_draw_quad.h" |
#include "util/u_inlines.h" |
|
enum pipe_format formats[] = { |
PIPE_FORMAT_RGBA8888_UNORM, |
PIPE_FORMAT_BGRA8888_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_surface *surf = NULL; |
static struct pipe_resource *tex = NULL; |
static void *window = NULL; |
|
struct vertex { |
float position[4]; |
float color[4]; |
}; |
|
static struct vertex vertices[4] = |
{ |
{ { 0.0f, -0.9f, 0.0f, 1.0f }, |
{ 1.0f, 0.0f, 0.0f, 1.0f } |
}, |
{ { -0.9f, 0.9f, 0.0f, 1.0f }, |
{ 0.0f, 1.0f, 0.0f, 1.0f } |
}, |
{ { 0.9f, 0.9f, 0.0f, 1.0f }, |
{ 0.0f, 0.0f, 1.0f, 1.0f } |
} |
}; |
|
|
|
|
static void set_viewport( float x, float y, |
float width, float height, |
float zNear, float zFar) |
{ |
float z = zFar; |
float half_width = (float)width / 2.0f; |
float half_height = (float)height / 2.0f; |
float half_depth = ((float)zFar - (float)zNear) / 2.0f; |
struct pipe_viewport_state vp; |
|
vp.scale[0] = half_width; |
vp.scale[1] = half_height; |
vp.scale[2] = half_depth; |
|
vp.translate[0] = half_width + x; |
vp.translate[1] = half_height + y; |
vp.translate[2] = half_depth + z; |
|
ctx->set_viewport_states( ctx, 0, 1, &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); |
|
memset(&vbuf, 0, sizeof vbuf); |
|
vbuf.stride = sizeof( struct vertex ); |
vbuf.buffer_offset = 0; |
vbuf.buffer = pipe_buffer_create_with_data(ctx, |
PIPE_BIND_VERTEX_BUFFER, |
PIPE_USAGE_DEFAULT, |
sizeof(vertices), |
vertices); |
|
ctx->set_vertex_buffers(ctx, 0, 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], COLOR\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], COLOR, LINEAR\n" |
"DCL OUT[0], COLOR\n" |
" 0: MOV OUT[0], IN[0]\n" |
" 1: END\n"; |
|
handle = graw_parse_fragment_shader(ctx, text); |
ctx->bind_fs_state(ctx, handle); |
} |
|
|
static void set_geometry_shader( void ) |
{ |
void *handle; |
const char *text = |
"GEOM\n" |
"PROPERTY GS_INPUT_PRIMITIVE TRIANGLES\n" |
"PROPERTY GS_OUTPUT_PRIMITIVE TRIANGLE_STRIP\n" |
"DCL IN[][0], POSITION, CONSTANT\n" |
"DCL IN[][1], COLOR, CONSTANT\n" |
"DCL OUT[0], POSITION, CONSTANT\n" |
"DCL OUT[1], COLOR, CONSTANT\n" |
"0:MOV OUT[0], IN[0][0]\n" |
"1:MOV OUT[1], IN[0][1]\n" |
"2:EMIT\n" |
"3:MOV OUT[0], IN[1][0]\n" |
"4:MOV OUT[1], IN[0][1]\n" /* copy color from input vertex 0 */ |
"5:EMIT\n" |
"6:MOV OUT[0], IN[2][0]\n" |
"7:MOV OUT[1], IN[2][1]\n" |
"8:EMIT\n" |
"9:ENDPRIM\n" |
"10:END\n"; |
|
handle = graw_parse_geometry_shader(ctx, text); |
ctx->bind_gs_state(ctx, handle); |
} |
|
static void draw( void ) |
{ |
union pipe_color_union clear_color = { {1,0,1,1} }; |
|
ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0); |
util_draw_arrays(ctx, PIPE_PRIM_TRIANGLES, 0, 3); |
ctx->flush(ctx, NULL, 0); |
|
screen->flush_frontbuffer(screen, tex, 0, 0, window, NULL); |
} |
|
|
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); |
|
tex = screen->resource_create(screen, |
&templat); |
if (tex == NULL) |
exit(4); |
|
surf_tmpl.format = templat.format; |
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, tex, &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.half_pixel_center = 1; |
rasterizer.bottom_edge_rule = 1; |
rasterizer.depth_clip = 1; |
handle = ctx->create_rasterizer_state(ctx, &rasterizer); |
ctx->bind_rasterizer_state(ctx, handle); |
} |
|
set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000); |
set_vertices(); |
set_vertex_shader(); |
set_fragment_shader(); |
set_geometry_shader(); |
} |
|
|
int main( int argc, char *argv[] ) |
{ |
init(); |
|
graw_set_display_func( draw ); |
graw_main_loop(); |
return 0; |
} |