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/************************************************************************** |
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* |
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* Copyright © 2010 Jakob Bornecrantz |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice (including the next |
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* paragraph) shall be included in all copies or substantial portions of the |
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* Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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* DEALINGS IN THE SOFTWARE. |
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* |
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**************************************************************************/ |
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#define USE_TRACE 0 |
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#define WIDTH 300 |
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#define HEIGHT 300 |
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#define NEAR 30 |
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#define FAR 1000 |
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#define FLIP 0 |
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/* pipe_*_state structs */ |
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#include "pipe/p_state.h" |
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/* pipe_context */ |
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#include "pipe/p_context.h" |
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/* pipe_screen */ |
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#include "pipe/p_screen.h" |
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/* PIPE_* */ |
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#include "pipe/p_defines.h" |
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/* TGSI_SEMANTIC_{POSITION|GENERIC} */ |
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#include "pipe/p_shader_tokens.h" |
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/* pipe_buffer_* helpers */ |
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#include "util/u_inlines.h" |
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/* constant state object helper */ |
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#include "cso_cache/cso_context.h" |
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/* u_sampler_view_default_template */ |
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#include "util/u_sampler.h" |
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/* debug_dump_surface_bmp */ |
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#include "util/u_debug.h" |
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/* util_draw_vertex_buffer helper */ |
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#include "util/u_draw_quad.h" |
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/* FREE & CALLOC_STRUCT */ |
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#include "util/u_memory.h" |
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/* util_make_[fragment|vertex]_passthrough_shader */ |
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#include "util/u_simple_shaders.h" |
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/* softpipe software driver */ |
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#include "softpipe/sp_public.h" |
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/* null software winsys */ |
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#include "sw/null/null_sw_winsys.h" |
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/* traceing support see src/gallium/drivers/trace/README for more info. */ |
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#if USE_TRACE |
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#include "trace/tr_screen.h" |
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#include "trace/tr_context.h" |
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#endif |
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struct program |
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{ |
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struct pipe_screen *screen; |
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struct pipe_context *pipe; |
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struct cso_context *cso; |
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struct pipe_blend_state blend; |
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struct pipe_depth_stencil_alpha_state depthstencil; |
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struct pipe_rasterizer_state rasterizer; |
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struct pipe_sampler_state sampler; |
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struct pipe_viewport_state viewport; |
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struct pipe_framebuffer_state framebuffer; |
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struct pipe_vertex_element velem[2]; |
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void *vs; |
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void *fs; |
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float clear_color[4]; |
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struct pipe_buffer *vbuf; |
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struct pipe_texture *target; |
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struct pipe_texture *tex; |
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struct pipe_sampler_view *view; |
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}; |
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static void init_prog(struct program *p) |
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{ |
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/* create the software rasterizer */ |
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p->screen = softpipe_create_screen(null_sw_create()); |
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#if USE_TRACE |
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p->screen = trace_screen_create(p->screen); |
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#endif |
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p->pipe = p->screen->context_create(p->screen, NULL); |
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p->cso = cso_create_context(p->pipe); |
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/* set clear color */ |
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p->clear_color[0] = 0.3; |
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p->clear_color[1] = 0.1; |
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p->clear_color[2] = 0.3; |
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p->clear_color[3] = 1.0; |
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/* vertex buffer */ |
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{ |
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float vertices[4][2][4] = { |
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{ |
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{ 0.9f, 0.9f, 0.0f, 1.0f }, |
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{ 1.0f, 1.0f, 0.0f, 1.0f } |
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}, |
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{ |
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{ -0.9f, 0.9f, 0.0f, 1.0f }, |
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{ 0.0f, 1.0f, 0.0f, 1.0f } |
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}, |
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{ |
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{ -0.9f, -0.9f, 0.0f, 1.0f }, |
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{ 0.0f, 0.0f, 1.0f, 1.0f } |
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}, |
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{ |
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{ 0.9f, -0.9f, 0.0f, 1.0f }, |
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{ 1.0f, 0.0f, 1.0f, 1.0f } |
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} |
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}; |
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p->vbuf = pipe_buffer_create(p->screen, 16, PIPE_BUFFER_USAGE_VERTEX, sizeof(vertices)); |
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pipe_buffer_write(p->screen, p->vbuf, 0, sizeof(vertices), vertices); |
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} |
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/* render target texture */ |
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{ |
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struct pipe_texture tmplt; |
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memset(&tmplt, 0, sizeof(tmplt)); |
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tmplt.target = PIPE_TEXTURE_2D; |
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tmplt.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */ |
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tmplt.width0 = WIDTH; |
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tmplt.height0 = HEIGHT; |
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tmplt.depth0 = 1; |
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tmplt.last_level = 0; |
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tmplt.tex_usage = PIPE_TEXTURE_USAGE_RENDER_TARGET; |
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p->target = p->screen->texture_create(p->screen, &tmplt); |
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} |
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/* sampler texture */ |
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{ |
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uint32_t *ptr; |
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struct pipe_transfer *t; |
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struct pipe_texture t_tmplt; |
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struct pipe_sampler_view v_tmplt; |
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memset(&t_tmplt, 0, sizeof(t_tmplt)); |
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t_tmplt.target = PIPE_TEXTURE_2D; |
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t_tmplt.format = PIPE_FORMAT_B8G8R8A8_UNORM; /* All drivers support this */ |
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t_tmplt.width0 = 2; |
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t_tmplt.height0 = 2; |
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t_tmplt.depth0 = 1; |
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t_tmplt.last_level = 0; |
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t_tmplt.tex_usage = PIPE_TEXTURE_USAGE_RENDER_TARGET; |
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p->tex = p->screen->texture_create(p->screen, &t_tmplt); |
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t = p->pipe->get_tex_transfer(p->pipe, p->tex, |
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0, 0, 0, /* face, level, zslice */ |
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PIPE_TRANSFER_WRITE, |
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0, 0, 2, 2); /* x, y, width, height */ |
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ptr = p->pipe->transfer_map(p->pipe, t); |
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ptr[0] = 0xffff0000; |
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ptr[1] = 0xff0000ff; |
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ptr[2] = 0xff00ff00; |
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ptr[3] = 0xffffff00; |
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p->pipe->transfer_unmap(p->pipe, t); |
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p->pipe->tex_transfer_destroy(p->pipe, t); |
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u_sampler_view_default_template(&v_tmplt, p->tex, p->tex->format); |
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p->view = p->pipe->create_sampler_view(p->pipe, p->tex, &v_tmplt); |
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} |
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/* disabled blending/masking */ |
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memset(&p->blend, 0, sizeof(p->blend)); |
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p->blend.rt[0].colormask = PIPE_MASK_RGBA; |
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/* no-op depth/stencil/alpha */ |
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memset(&p->depthstencil, 0, sizeof(p->depthstencil)); |
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/* rasterizer */ |
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memset(&p->rasterizer, 0, sizeof(p->rasterizer)); |
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p->rasterizer.front_winding = PIPE_WINDING_CW; |
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p->rasterizer.cull_mode = PIPE_WINDING_NONE; |
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p->rasterizer.gl_rasterization_rules = 1; |
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/* sampler */ |
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memset(&p->sampler, 0, sizeof(p->sampler)); |
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p->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
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p->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
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p->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE; |
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p->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; |
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p->sampler.min_img_filter = PIPE_TEX_MIPFILTER_LINEAR; |
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p->sampler.mag_img_filter = PIPE_TEX_MIPFILTER_LINEAR; |
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p->sampler.normalized_coords = 1; |
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/* drawing destination */ |
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memset(&p->framebuffer, 0, sizeof(p->framebuffer)); |
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p->framebuffer.width = WIDTH; |
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p->framebuffer.height = HEIGHT; |
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p->framebuffer.nr_cbufs = 1; |
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p->framebuffer.cbufs[0] = p->screen->get_tex_surface(p->screen, p->target, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_WRITE); |
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/* viewport, depth isn't really needed */ |
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{ |
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float x = 0; |
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float y = 0; |
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float z = FAR; |
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float half_width = (float)WIDTH / 2.0f; |
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float half_height = (float)HEIGHT / 2.0f; |
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float half_depth = ((float)FAR - (float)NEAR) / 2.0f; |
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float scale, bias; |
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if (FLIP) { |
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scale = -1.0f; |
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bias = (float)HEIGHT; |
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} else { |
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scale = 1.0f; |
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bias = 0.0f; |
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} |
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p->viewport.scale[0] = half_width; |
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p->viewport.scale[1] = half_height * scale; |
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p->viewport.scale[2] = half_depth; |
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p->viewport.scale[3] = 1.0f; |
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p->viewport.translate[0] = half_width + x; |
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p->viewport.translate[1] = (half_height + y) * scale + bias; |
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p->viewport.translate[2] = half_depth + z; |
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p->viewport.translate[3] = 0.0f; |
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} |
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/* vertex elements state */ |
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memset(p->velem, 0, sizeof(p->velem)); |
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p->velem[0].src_offset = 0 * 4 * sizeof(float); /* offset 0, first element */ |
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p->velem[0].instance_divisor = 0; |
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p->velem[0].vertex_buffer_index = 0; |
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p->velem[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
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p->velem[1].src_offset = 1 * 4 * sizeof(float); /* offset 16, second element */ |
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p->velem[1].instance_divisor = 0; |
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p->velem[1].vertex_buffer_index = 0; |
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p->velem[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
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/* vertex shader */ |
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{ |
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const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, |
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TGSI_SEMANTIC_GENERIC }; |
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const uint semantic_indexes[] = { 0, 0 }; |
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p->vs = util_make_vertex_passthrough_shader(p->pipe, 2, semantic_names, semantic_indexes); |
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} |
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/* fragment shader */ |
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p->fs = util_make_fragment_tex_shader(p->pipe, TGSI_TEXTURE_2D); |
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} |
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static void close_prog(struct program *p) |
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{ |
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/* unset bound textures as well */ |
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cso_set_fragment_sampler_views(p->cso, 0, NULL); |
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/* unset all state */ |
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cso_release_all(p->cso); |
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p->pipe->delete_vs_state(p->pipe, p->vs); |
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p->pipe->delete_fs_state(p->pipe, p->fs); |
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pipe_surface_reference(&p->framebuffer.cbufs[0], NULL); |
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pipe_sampler_view_reference(&p->view, NULL); |
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pipe_texture_reference(&p->target, NULL); |
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pipe_texture_reference(&p->tex, NULL); |
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pipe_buffer_reference(&p->vbuf, NULL); |
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cso_destroy_context(p->cso); |
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p->pipe->destroy(p->pipe); |
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p->screen->destroy(p->screen); |
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FREE(p); |
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} |
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static void draw(struct program *p) |
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{ |
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/* set the render target */ |
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cso_set_framebuffer(p->cso, &p->framebuffer); |
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/* clear the render target */ |
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p->pipe->clear(p->pipe, PIPE_CLEAR_COLOR, p->clear_color, 0, 0); |
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/* set misc state we care about */ |
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cso_set_blend(p->cso, &p->blend); |
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cso_set_depth_stencil_alpha(p->cso, &p->depthstencil); |
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cso_set_rasterizer(p->cso, &p->rasterizer); |
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cso_set_viewport(p->cso, &p->viewport); |
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/* sampler */ |
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cso_single_sampler(p->cso, 0, &p->sampler); |
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cso_single_sampler_done(p->cso); |
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/* texture sampler view */ |
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cso_set_fragment_sampler_views(p->cso, 1, &p->view); |
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/* shaders */ |
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cso_set_fragment_shader_handle(p->cso, p->fs); |
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cso_set_vertex_shader_handle(p->cso, p->vs); |
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/* vertex element data */ |
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cso_set_vertex_elements(p->cso, 2, p->velem); |
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util_draw_vertex_buffer(p->pipe, |
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p->vbuf, 0, |
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PIPE_PRIM_QUADS, |
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4, /* verts */ |
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2); /* attribs/vert */ |
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p->pipe->flush(p->pipe, PIPE_FLUSH_RENDER_CACHE, NULL); |
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debug_dump_surface_bmp(p->pipe, "result.bmp", p->framebuffer.cbufs[0]); |
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} |
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int main(int argc, char** argv) |
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{ |
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struct program *p = CALLOC_STRUCT(program); |
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init_prog(p); |
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draw(p); |
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close_prog(p); |
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return 0; |
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} |
Jakob Bornecrantz
15 years ago