/********************************************************** * Copyright 2008-2009 VMware, Inc. All rights reserved. * * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, * modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * **********************************************************/ #include "util/u_inlines.h" #include "pipe/p_defines.h" #include "svga_screen.h" #include "svga_context.h" #include "svga_state.h" #include "svga_cmd.h" #include "svga_tgsi.h" #include "svga_debug.h" #include "svga_hw_reg.h" /* * Don't try to send more than 4kb of successive constants. */ #define MAX_CONST_REG_COUNT 256 /**< number of float[4] constants */ /** * Convert from PIPE_SHADER_* to SVGA3D_SHADERTYPE_* */ static unsigned svga_shader_type(unsigned shader) { switch (shader) { case PIPE_SHADER_VERTEX: return SVGA3D_SHADERTYPE_VS; case PIPE_SHADER_FRAGMENT: return SVGA3D_SHADERTYPE_PS; default: assert(!"Unexpected shader type"); return SVGA3D_SHADERTYPE_VS; } } /** * Check and emit one shader constant register. * \param shader PIPE_SHADER_FRAGMENT or PIPE_SHADER_VERTEX * \param i which float[4] constant to change * \param value the new float[4] value */ static enum pipe_error emit_const(struct svga_context *svga, unsigned shader, unsigned i, const float *value) { enum pipe_error ret = PIPE_OK; assert(shader < PIPE_SHADER_TYPES); assert(i < SVGA3D_CONSTREG_MAX); if (memcmp(svga->state.hw_draw.cb[shader][i], value, 4 * sizeof(float)) != 0) { if (SVGA_DEBUG & DEBUG_CONSTS) debug_printf("%s %s %u: %f %f %f %f\n", __FUNCTION__, shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG", i, value[0], value[1], value[2], value[3]); ret = SVGA3D_SetShaderConst( svga->swc, i, svga_shader_type(shader), SVGA3D_CONST_TYPE_FLOAT, value ); if (ret != PIPE_OK) return ret; memcpy(svga->state.hw_draw.cb[shader][i], value, 4 * sizeof(float)); } return ret; } /* * Check and emit a range of shader constant registers, trying to coalesce * successive shader constant updates in a single command in order to save * space on the command buffer. This is a HWv8 feature. */ static enum pipe_error emit_const_range(struct svga_context *svga, unsigned shader, unsigned offset, unsigned count, const float (*values)[4]) { unsigned i, j; enum pipe_error ret; #ifdef DEBUG if (offset + count > SVGA3D_CONSTREG_MAX) { debug_printf("svga: too many constants (offset + count = %u)\n", offset + count); } #endif if (offset > SVGA3D_CONSTREG_MAX) { /* This isn't OK, but if we propagate an error all the way up we'll * just get into more trouble. * XXX note that offset is always zero at this time so this is moot. */ return PIPE_OK; } if (offset + count > SVGA3D_CONSTREG_MAX) { /* Just drop the extra constants for now. * Ideally we should not have allowed the app to create a shader * that exceeds our constant buffer size but there's no way to * express that in gallium at this time. */ count = SVGA3D_CONSTREG_MAX - offset; } i = 0; while (i < count) { if (memcmp(svga->state.hw_draw.cb[shader][offset + i], values[i], 4 * sizeof(float)) != 0) { /* Found one dirty constant */ if (SVGA_DEBUG & DEBUG_CONSTS) debug_printf("%s %s %d: %f %f %f %f\n", __FUNCTION__, shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG", offset + i, values[i][0], values[i][1], values[i][2], values[i][3]); /* Look for more consecutive dirty constants. */ j = i + 1; while (j < count && j < i + MAX_CONST_REG_COUNT && memcmp(svga->state.hw_draw.cb[shader][offset + j], values[j], 4 * sizeof(float)) != 0) { if (SVGA_DEBUG & DEBUG_CONSTS) debug_printf("%s %s %d: %f %f %f %f\n", __FUNCTION__, shader == PIPE_SHADER_VERTEX ? "VERT" : "FRAG", offset + j, values[j][0], values[j][1], values[j][2], values[j][3]); ++j; } assert(j >= i + 1); /* Send them all together. */ ret = SVGA3D_SetShaderConsts(svga->swc, offset + i, j - i, svga_shader_type(shader), SVGA3D_CONST_TYPE_FLOAT, values + i); if (ret != PIPE_OK) { return ret; } /* * Local copy of the hardware state. */ memcpy(svga->state.hw_draw.cb[shader][offset + i], values[i], (j - i) * 4 * sizeof(float)); i = j + 1; } else { ++i; } } return PIPE_OK; } /** * Emit all the constants in a constant buffer for a shader stage. */ static enum pipe_error emit_consts(struct svga_context *svga, unsigned shader) { struct svga_screen *ss = svga_screen(svga->pipe.screen); struct pipe_transfer *transfer = NULL; unsigned count; const float (*data)[4] = NULL; unsigned i; enum pipe_error ret = PIPE_OK; const unsigned offset = 0; assert(shader < PIPE_SHADER_TYPES); if (svga->curr.cb[shader] == NULL) goto done; count = svga->curr.cb[shader]->width0 / (4 * sizeof(float)); data = (const float (*)[4])pipe_buffer_map(&svga->pipe, svga->curr.cb[shader], PIPE_TRANSFER_READ, &transfer); if (data == NULL) { ret = PIPE_ERROR_OUT_OF_MEMORY; goto done; } if (ss->hw_version >= SVGA3D_HWVERSION_WS8_B1) { ret = emit_const_range( svga, shader, offset, count, data ); if (ret != PIPE_OK) { goto done; } } else { for (i = 0; i < count; i++) { ret = emit_const( svga, shader, offset + i, data[i] ); if (ret != PIPE_OK) { goto done; } } } done: if (data) pipe_buffer_unmap(&svga->pipe, transfer); return ret; } static enum pipe_error emit_fs_consts(struct svga_context *svga, unsigned dirty) { const struct svga_shader_result *result = svga->state.hw_draw.fs; enum pipe_error ret = PIPE_OK; ret = emit_consts( svga, PIPE_SHADER_FRAGMENT ); if (ret != PIPE_OK) return ret; /* The internally generated fragment shader for xor blending * doesn't have a 'result' struct. It should be fixed to avoid * this special case, but work around it with a NULL check: */ if (result) { const struct svga_fs_compile_key *key = &result->key.fkey; if (key->num_unnormalized_coords) { const unsigned offset = result->shader->info.file_max[TGSI_FILE_CONSTANT] + 1; unsigned i; for (i = 0; i < key->num_textures; i++) { if (key->tex[i].unnormalized) { struct pipe_resource *tex = svga->curr.sampler_views[i]->texture; float data[4]; data[0] = 1.0f / (float) tex->width0; data[1] = 1.0f / (float) tex->height0; data[2] = 1.0f; data[3] = 1.0f; ret = emit_const(svga, PIPE_SHADER_FRAGMENT, key->tex[i].width_height_idx + offset, data); if (ret != PIPE_OK) { return ret; } } } } } return PIPE_OK; } struct svga_tracked_state svga_hw_fs_constants = { "hw fs params", (SVGA_NEW_FS_CONST_BUFFER | SVGA_NEW_FS_RESULT | SVGA_NEW_TEXTURE_BINDING), emit_fs_consts }; static enum pipe_error emit_vs_consts(struct svga_context *svga, unsigned dirty) { const struct svga_shader_result *result = svga->state.hw_draw.vs; const struct svga_vs_compile_key *key; enum pipe_error ret = PIPE_OK; unsigned offset; /* SVGA_NEW_VS_RESULT */ if (result == NULL) return PIPE_OK; key = &result->key.vkey; /* SVGA_NEW_VS_CONST_BUFFER */ ret = emit_consts( svga, PIPE_SHADER_VERTEX ); if (ret != PIPE_OK) return ret; /* offset = number of constants in the VS const buffer */ offset = result->shader->info.file_max[TGSI_FILE_CONSTANT] + 1; /* SVGA_NEW_VS_PRESCALE * Put the viewport pre-scale/translate values into the const buffer. */ if (key->need_prescale) { ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++, svga->state.hw_clear.prescale.scale ); if (ret != PIPE_OK) return ret; ret = emit_const( svga, PIPE_SHADER_VERTEX, offset++, svga->state.hw_clear.prescale.translate ); if (ret != PIPE_OK) return ret; } return PIPE_OK; } struct svga_tracked_state svga_hw_vs_constants = { "hw vs params", (SVGA_NEW_PRESCALE | SVGA_NEW_VS_CONST_BUFFER | SVGA_NEW_VS_RESULT), emit_vs_consts };