diff options
Diffstat (limited to 'src/mesa/state_tracker/st_draw.c')
| -rw-r--r-- | src/mesa/state_tracker/st_draw.c | 905 |
1 files changed, 905 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c new file mode 100644 index 0000000000..4bc734bad3 --- /dev/null +++ b/src/mesa/state_tracker/st_draw.c @@ -0,0 +1,905 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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. + * + **************************************************************************/ + + /* + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + */ + +#include "main/imports.h" +#include "main/image.h" +#include "main/macros.h" +#include "shader/prog_uniform.h" + +#include "vbo/vbo.h" + +#include "st_context.h" +#include "st_atom.h" +#include "st_cb_bufferobjects.h" +#include "st_draw.h" +#include "st_program.h" + +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "pipe/p_inlines.h" + +#include "draw/draw_private.h" +#include "draw/draw_context.h" + + +static GLuint double_types[4] = { + PIPE_FORMAT_R64_FLOAT, + PIPE_FORMAT_R64G64_FLOAT, + PIPE_FORMAT_R64G64B64_FLOAT, + PIPE_FORMAT_R64G64B64A64_FLOAT +}; + +static GLuint float_types[4] = { + PIPE_FORMAT_R32_FLOAT, + PIPE_FORMAT_R32G32_FLOAT, + PIPE_FORMAT_R32G32B32_FLOAT, + PIPE_FORMAT_R32G32B32A32_FLOAT +}; + +static GLuint uint_types_norm[4] = { + PIPE_FORMAT_R32_UNORM, + PIPE_FORMAT_R32G32_UNORM, + PIPE_FORMAT_R32G32B32_UNORM, + PIPE_FORMAT_R32G32B32A32_UNORM +}; + +static GLuint uint_types_scale[4] = { + PIPE_FORMAT_R32_USCALED, + PIPE_FORMAT_R32G32_USCALED, + PIPE_FORMAT_R32G32B32_USCALED, + PIPE_FORMAT_R32G32B32A32_USCALED +}; + +static GLuint int_types_norm[4] = { + PIPE_FORMAT_R32_SNORM, + PIPE_FORMAT_R32G32_SNORM, + PIPE_FORMAT_R32G32B32_SNORM, + PIPE_FORMAT_R32G32B32A32_SNORM +}; + +static GLuint int_types_scale[4] = { + PIPE_FORMAT_R32_SSCALED, + PIPE_FORMAT_R32G32_SSCALED, + PIPE_FORMAT_R32G32B32_SSCALED, + PIPE_FORMAT_R32G32B32A32_SSCALED +}; + +static GLuint ushort_types_norm[4] = { + PIPE_FORMAT_R16_UNORM, + PIPE_FORMAT_R16G16_UNORM, + PIPE_FORMAT_R16G16B16_UNORM, + PIPE_FORMAT_R16G16B16A16_UNORM +}; + +static GLuint ushort_types_scale[4] = { + PIPE_FORMAT_R16_USCALED, + PIPE_FORMAT_R16G16_USCALED, + PIPE_FORMAT_R16G16B16_USCALED, + PIPE_FORMAT_R16G16B16A16_USCALED +}; + +static GLuint short_types_norm[4] = { + PIPE_FORMAT_R16_SNORM, + PIPE_FORMAT_R16G16_SNORM, + PIPE_FORMAT_R16G16B16_SNORM, + PIPE_FORMAT_R16G16B16A16_SNORM +}; + +static GLuint short_types_scale[4] = { + PIPE_FORMAT_R16_SSCALED, + PIPE_FORMAT_R16G16_SSCALED, + PIPE_FORMAT_R16G16B16_SSCALED, + PIPE_FORMAT_R16G16B16A16_SSCALED +}; + +static GLuint ubyte_types_norm[4] = { + PIPE_FORMAT_R8_UNORM, + PIPE_FORMAT_R8G8_UNORM, + PIPE_FORMAT_R8G8B8_UNORM, + PIPE_FORMAT_R8G8B8A8_UNORM +}; + +static GLuint ubyte_types_scale[4] = { + PIPE_FORMAT_R8_USCALED, + PIPE_FORMAT_R8G8_USCALED, + PIPE_FORMAT_R8G8B8_USCALED, + PIPE_FORMAT_R8G8B8A8_USCALED +}; + +static GLuint byte_types_norm[4] = { + PIPE_FORMAT_R8_SNORM, + PIPE_FORMAT_R8G8_SNORM, + PIPE_FORMAT_R8G8B8_SNORM, + PIPE_FORMAT_R8G8B8A8_SNORM +}; + +static GLuint byte_types_scale[4] = { + PIPE_FORMAT_R8_SSCALED, + PIPE_FORMAT_R8G8_SSCALED, + PIPE_FORMAT_R8G8B8_SSCALED, + PIPE_FORMAT_R8G8B8A8_SSCALED +}; + +static GLuint fixed_types[4] = { + PIPE_FORMAT_R32_FIXED, + PIPE_FORMAT_R32G32_FIXED, + PIPE_FORMAT_R32G32B32_FIXED, + PIPE_FORMAT_R32G32B32A32_FIXED +}; + + + +/** + * Return a PIPE_FORMAT_x for the given GL datatype and size. + */ +static GLuint +pipe_vertex_format(GLenum type, GLuint size, GLboolean normalized) +{ + assert((type >= GL_BYTE && type <= GL_DOUBLE) || + type == GL_FIXED); + assert(size >= 1); + assert(size <= 4); + + if (normalized) { + switch (type) { + case GL_DOUBLE: return double_types[size-1]; + case GL_FLOAT: return float_types[size-1]; + case GL_INT: return int_types_norm[size-1]; + case GL_SHORT: return short_types_norm[size-1]; + case GL_BYTE: return byte_types_norm[size-1]; + case GL_UNSIGNED_INT: return uint_types_norm[size-1]; + case GL_UNSIGNED_SHORT: return ushort_types_norm[size-1]; + case GL_UNSIGNED_BYTE: return ubyte_types_norm[size-1]; + case GL_FIXED: return fixed_types[size-1]; + default: assert(0); return 0; + } + } + else { + switch (type) { + case GL_DOUBLE: return double_types[size-1]; + case GL_FLOAT: return float_types[size-1]; + case GL_INT: return int_types_scale[size-1]; + case GL_SHORT: return short_types_scale[size-1]; + case GL_BYTE: return byte_types_scale[size-1]; + case GL_UNSIGNED_INT: return uint_types_scale[size-1]; + case GL_UNSIGNED_SHORT: return ushort_types_scale[size-1]; + case GL_UNSIGNED_BYTE: return ubyte_types_scale[size-1]; + case GL_FIXED: return fixed_types[size-1]; + default: assert(0); return 0; + } + } + return 0; /* silence compiler warning */ +} + + +/* + * If edge flags are needed, setup an bitvector of flags and call + * pipe->set_edgeflags(). + * XXX memleak: need to free the returned pointer at some point + */ +static void * +setup_edgeflags(GLcontext *ctx, GLenum primMode, GLint start, GLint count, + const struct gl_client_array *array) +{ + struct pipe_context *pipe = ctx->st->pipe; + + if ((primMode == GL_TRIANGLES || + primMode == GL_QUADS || + primMode == GL_POLYGON) && + (ctx->Polygon.FrontMode != GL_FILL || + ctx->Polygon.BackMode != GL_FILL)) { + /* need edge flags */ + GLint i; + unsigned *vec; + struct st_buffer_object *stobj = st_buffer_object(array->BufferObj); + ubyte *map; + + if (!stobj) + return NULL; + + vec = (unsigned *) calloc(sizeof(unsigned), (count + 31) / 32); + if (!vec) + return NULL; + + map = pipe_buffer_map(pipe->screen, stobj->buffer, PIPE_BUFFER_USAGE_CPU_READ); + map = ADD_POINTERS(map, array->Ptr); + + for (i = 0; i < count; i++) { + if (*((float *) map)) + vec[i/32] |= 1 << (i % 32); + + map += array->StrideB; + } + + pipe_buffer_unmap(pipe->screen, stobj->buffer); + + pipe->set_edgeflags(pipe, vec); + + return vec; + } + else { + /* edge flags not needed */ + pipe->set_edgeflags(pipe, NULL); + return NULL; + } +} + + +/** + * Examine the active arrays to determine if we have interleaved + * vertex arrays all living in one VBO, or all living in user space. + * \param userSpace returns whether the arrays are in user space. + */ +static GLboolean +is_interleaved_arrays(const struct st_vertex_program *vp, + const struct gl_client_array **arrays, + GLboolean *userSpace) +{ + GLuint attr; + const struct gl_buffer_object *firstBufObj = NULL; + GLint firstStride = -1; + GLuint num_client_arrays = 0; + const GLubyte *client_addr = NULL; + + for (attr = 0; attr < vp->num_inputs; attr++) { + const GLuint mesaAttr = vp->index_to_input[attr]; + const struct gl_buffer_object *bufObj = arrays[mesaAttr]->BufferObj; + const GLsizei stride = arrays[mesaAttr]->StrideB; /* in bytes */ + + if (firstStride < 0) { + firstStride = stride; + } + else if (firstStride != stride) { + return GL_FALSE; + } + + if (!bufObj || !bufObj->Name) { + num_client_arrays++; + /* Try to detect if the client-space arrays are + * "close" to each other. + */ + if (!client_addr) { + client_addr = arrays[mesaAttr]->Ptr; + } + else if (abs(arrays[mesaAttr]->Ptr - client_addr) > firstStride) { + /* arrays start too far apart */ + return GL_FALSE; + } + } + else if (!firstBufObj) { + firstBufObj = bufObj; + } + else if (bufObj != firstBufObj) { + return GL_FALSE; + } + } + + *userSpace = (num_client_arrays == vp->num_inputs); + /*printf("user space: %d\n", (int) *userSpace);*/ + + return GL_TRUE; +} + + +/** + * Once we know all the arrays are in user space, this function + * computes the memory range occupied by the arrays. + */ +static void +get_user_arrays_bounds(const struct st_vertex_program *vp, + const struct gl_client_array **arrays, + GLuint max_index, + const GLubyte **low, const GLubyte **high) +{ + const GLubyte *low_addr = NULL; + GLuint attr; + GLint stride; + + for (attr = 0; attr < vp->num_inputs; attr++) { + const GLuint mesaAttr = vp->index_to_input[attr]; + const GLubyte *start = arrays[mesaAttr]->Ptr; + stride = arrays[mesaAttr]->StrideB; + if (attr == 0) { + low_addr = start; + } + else { + low_addr = MIN2(low_addr, start); + } + } + + *low = low_addr; + *high = low_addr + (max_index + 1) * stride; +} + + +/** + * Set up for drawing interleaved arrays that all live in one VBO + * or all live in user space. + * \param vbuffer returns vertex buffer info + * \param velements returns vertex element info + */ +static void +setup_interleaved_attribs(GLcontext *ctx, + const struct st_vertex_program *vp, + const struct gl_client_array **arrays, + GLuint max_index, + GLboolean userSpace, + struct pipe_vertex_buffer *vbuffer, + struct pipe_vertex_element velements[]) +{ + struct pipe_context *pipe = ctx->st->pipe; + GLuint attr; + const GLubyte *offset0; + + for (attr = 0; attr < vp->num_inputs; attr++) { + const GLuint mesaAttr = vp->index_to_input[attr]; + struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj; + struct st_buffer_object *stobj = st_buffer_object(bufobj); + GLsizei stride = arrays[mesaAttr]->StrideB; + + /*printf("stobj %u = %p\n", attr, (void*)stobj);*/ + + if (attr == 0) { + if (userSpace) { + const GLubyte *low, *high; + get_user_arrays_bounds(vp, arrays, max_index, &low, &high); + /*printf("user buffer range: %p %p %d\n", low, high, high-low);*/ + vbuffer->buffer = + pipe_user_buffer_create(pipe->screen, (void *) low, high - low); + vbuffer->buffer_offset = 0; + offset0 = low; + } + else { + vbuffer->buffer = NULL; + pipe_buffer_reference(pipe->screen, &vbuffer->buffer, stobj->buffer); + vbuffer->buffer_offset = (unsigned) arrays[mesaAttr]->Ptr; + offset0 = arrays[mesaAttr]->Ptr; + } + vbuffer->pitch = stride; /* in bytes */ + vbuffer->max_index = max_index; + } + + velements[attr].src_offset = + (unsigned) (arrays[mesaAttr]->Ptr - offset0); + velements[attr].vertex_buffer_index = 0; + velements[attr].nr_components = arrays[mesaAttr]->Size; + velements[attr].src_format = + pipe_vertex_format(arrays[mesaAttr]->Type, + arrays[mesaAttr]->Size, + arrays[mesaAttr]->Normalized); + assert(velements[attr].src_format); + } +} + + +/** + * Set up a separate pipe_vertex_buffer and pipe_vertex_element for each + * vertex attribute. + * \param vbuffer returns vertex buffer info + * \param velements returns vertex element info + */ +static void +setup_non_interleaved_attribs(GLcontext *ctx, + const struct st_vertex_program *vp, + const struct gl_client_array **arrays, + GLuint max_index, + struct pipe_vertex_buffer vbuffer[], + struct pipe_vertex_element velements[]) +{ + struct pipe_context *pipe = ctx->st->pipe; + GLuint attr; + + for (attr = 0; attr < vp->num_inputs; attr++) { + const GLuint mesaAttr = vp->index_to_input[attr]; + struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj; + GLsizei stride = arrays[mesaAttr]->StrideB; + + if (bufobj && bufobj->Name) { + /* Attribute data is in a VBO. + * Recall that for VBOs, the gl_client_array->Ptr field is + * really an offset from the start of the VBO, not a pointer. + */ + struct st_buffer_object *stobj = st_buffer_object(bufobj); + assert(stobj->buffer); + /*printf("stobj %u = %p\n", attr, (void*) stobj);*/ + + vbuffer[attr].buffer = NULL; + pipe_buffer_reference(pipe->screen, &vbuffer[attr].buffer, stobj->buffer); + vbuffer[attr].buffer_offset = (unsigned) arrays[mesaAttr]->Ptr; + velements[attr].src_offset = 0; + } + else { + /* attribute data is in user-space memory, not a VBO */ + uint bytes; + /*printf("user-space array %d stride %d\n", attr, stride);*/ + + /* wrap user data */ + if (arrays[mesaAttr]->Ptr) { + /* user's vertex array */ + if (arrays[mesaAttr]->StrideB) { + bytes = arrays[mesaAttr]->StrideB * (max_index + 1); + } + else { + bytes = arrays[mesaAttr]->Size + * _mesa_sizeof_type(arrays[mesaAttr]->Type); + } + vbuffer[attr].buffer = pipe_user_buffer_create(pipe->screen, + (void *) arrays[mesaAttr]->Ptr, bytes); + } + else { + /* no array, use ctx->Current.Attrib[] value */ + bytes = sizeof(ctx->Current.Attrib[0]); + vbuffer[attr].buffer = pipe_user_buffer_create(pipe->screen, + (void *) ctx->Current.Attrib[mesaAttr], bytes); + stride = 0; + } + + vbuffer[attr].buffer_offset = 0; + velements[attr].src_offset = 0; + } + + assert(velements[attr].src_offset <= 2048); /* 11-bit field */ + + /* common-case setup */ + vbuffer[attr].pitch = stride; /* in bytes */ + vbuffer[attr].max_index = max_index; + velements[attr].vertex_buffer_index = attr; + velements[attr].nr_components = arrays[mesaAttr]->Size; + velements[attr].src_format + = pipe_vertex_format(arrays[mesaAttr]->Type, + arrays[mesaAttr]->Size, + arrays[mesaAttr]->Normalized); + assert(velements[attr].src_format); + } +} + + + +/** + * Prior to drawing, check that any uniforms referenced by the + * current shader have been set. If a uniform has not been set, + * issue a warning. + */ +static void +check_uniforms(GLcontext *ctx) +{ + const struct gl_shader_program *shProg = ctx->Shader.CurrentProgram; + if (shProg && shProg->LinkStatus) { + GLuint i; + for (i = 0; i < shProg->Uniforms->NumUniforms; i++) { + const struct gl_uniform *u = &shProg->Uniforms->Uniforms[i]; + if (!u->Initialized) { + _mesa_warning(ctx, + "Using shader with uninitialized uniform: %s", + u->Name); + } + } + } +} + + +/** + * This function gets plugged into the VBO module and is called when + * we have something to render. + * Basically, translate the information into the format expected by gallium. + */ +void +st_draw_vbo(GLcontext *ctx, + const struct gl_client_array **arrays, + const struct _mesa_prim *prims, + GLuint nr_prims, + const struct _mesa_index_buffer *ib, + GLuint min_index, + GLuint max_index) +{ + struct pipe_context *pipe = ctx->st->pipe; + const struct st_vertex_program *vp; + const struct pipe_shader_state *vs; + struct pipe_vertex_buffer vbuffer[PIPE_MAX_SHADER_INPUTS]; + GLuint attr; + struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS]; + unsigned num_vbuffers, num_velements; + GLboolean userSpace; + + /* sanity check for pointer arithmetic below */ + assert(sizeof(arrays[0]->Ptr[0]) == 1); + + st_validate_state(ctx->st); + + /* must get these after state validation! */ + vp = ctx->st->vp; + vs = &ctx->st->vp->state; + + if (MESA_VERBOSE & VERBOSE_GLSL) { + check_uniforms(ctx); + } + + /* + * Setup the vbuffer[] and velements[] arrays. + */ + if (is_interleaved_arrays(vp, arrays, &userSpace)) { + /*printf("Draw interleaved\n");*/ + setup_interleaved_attribs(ctx, vp, arrays, max_index, userSpace, + vbuffer, velements); + num_vbuffers = 1; + num_velements = vp->num_inputs; + if (num_velements == 0) + num_vbuffers = 0; + } + else { + /*printf("Draw non-interleaved\n");*/ + setup_non_interleaved_attribs(ctx, vp, arrays, max_index, + vbuffer, velements); + num_vbuffers = vp->num_inputs; + num_velements = vp->num_inputs; + } + +#if 0 + { + GLuint i; + for (i = 0; i < num_vbuffers; i++) { + printf("buffers[%d].pitch = %u\n", i, vbuffer[i].pitch); + printf("buffers[%d].max_index = %u\n", i, vbuffer[i].max_index); + printf("buffers[%d].buffer_offset = %u\n", i, vbuffer[i].buffer_offset); + printf("buffers[%d].buffer = %p\n", i, (void*) vbuffer[i].buffer); + } + for (i = 0; i < num_velements; i++) { + printf("vlements[%d].vbuffer_index = %u\n", i, velements[i].vertex_buffer_index); + printf("vlements[%d].src_offset = %u\n", i, velements[i].src_offset); + printf("vlements[%d].nr_comps = %u\n", i, velements[i].nr_components); + printf("vlements[%d].format = %s\n", i, pf_name(velements[i].src_format)); + } + } +#endif + + pipe->set_vertex_buffers(pipe, num_vbuffers, vbuffer); + pipe->set_vertex_elements(pipe, num_velements, velements); + + if (num_vbuffers == 0 || num_velements == 0) + return; + + /* do actual drawing */ + if (ib) { + /* indexed primitive */ + struct gl_buffer_object *bufobj = ib->obj; + struct pipe_buffer *indexBuf = NULL; + unsigned indexSize, indexOffset, i; + + switch (ib->type) { + case GL_UNSIGNED_INT: + indexSize = 4; + break; + case GL_UNSIGNED_SHORT: + indexSize = 2; + break; + case GL_UNSIGNED_BYTE: + indexSize = 1; + break; + default: + assert(0); + return; + } + + /* get/create the index buffer object */ + if (bufobj && bufobj->Name) { + /* elements/indexes are in a real VBO */ + struct st_buffer_object *stobj = st_buffer_object(bufobj); + pipe_buffer_reference(pipe->screen, &indexBuf, stobj->buffer); + indexOffset = (unsigned) ib->ptr / indexSize; + } + else { + /* element/indicies are in user space memory */ + indexBuf = pipe_user_buffer_create(pipe->screen, (void *) ib->ptr, + ib->count * indexSize); + indexOffset = 0; + } + + /* draw */ + if (nr_prims == 1 && pipe->draw_range_elements != NULL) { + i = 0; + + /* XXX: exercise temporary path to pass min/max directly + * through to driver & draw module. These interfaces still + * need a bit of work... + */ + setup_edgeflags(ctx, prims[i].mode, + prims[i].start + indexOffset, prims[i].count, + arrays[VERT_ATTRIB_EDGEFLAG]); + + pipe->draw_range_elements(pipe, indexBuf, indexSize, + min_index, + max_index, + prims[i].mode, + prims[i].start + indexOffset, prims[i].count); + } + else { + for (i = 0; i < nr_prims; i++) { + setup_edgeflags(ctx, prims[i].mode, + prims[i].start + indexOffset, prims[i].count, + arrays[VERT_ATTRIB_EDGEFLAG]); + + pipe->draw_elements(pipe, indexBuf, indexSize, + prims[i].mode, + prims[i].start + indexOffset, prims[i].count); + } + } + + pipe_buffer_reference(pipe->screen, &indexBuf, NULL); + } + else { + /* non-indexed */ + GLuint i; + for (i = 0; i < nr_prims; i++) { + setup_edgeflags(ctx, prims[i].mode, + prims[i].start, prims[i].count, + arrays[VERT_ATTRIB_EDGEFLAG]); + + pipe->draw_arrays(pipe, prims[i].mode, prims[i].start, prims[i].count); + } + } + + /* unreference buffers (frees wrapped user-space buffer objects) */ + for (attr = 0; attr < num_vbuffers; attr++) { + pipe_buffer_reference(pipe->screen, &vbuffer[attr].buffer, NULL); + assert(!vbuffer[attr].buffer); + } + pipe->set_vertex_buffers(pipe, num_vbuffers, vbuffer); +} + + +#if FEATURE_feedback || FEATURE_drawpix + +/** + * Set the (private) draw module's post-transformed vertex format when in + * GL_SELECT or GL_FEEDBACK mode or for glRasterPos. + */ +static void +set_feedback_vertex_format(GLcontext *ctx) +{ +#if 0 + struct st_context *st = ctx->st; + struct vertex_info vinfo; + GLuint i; + + memset(&vinfo, 0, sizeof(vinfo)); + + if (ctx->RenderMode == GL_SELECT) { + assert(ctx->RenderMode == GL_SELECT); + vinfo.num_attribs = 1; + vinfo.format[0] = FORMAT_4F; + vinfo.interp_mode[0] = INTERP_LINEAR; + } + else { + /* GL_FEEDBACK, or glRasterPos */ + /* emit all attribs (pos, color, texcoord) as GLfloat[4] */ + vinfo.num_attribs = st->state.vs->cso->state.num_outputs; + for (i = 0; i < vinfo.num_attribs; i++) { + vinfo.format[i] = FORMAT_4F; + vinfo.interp_mode[i] = INTERP_LINEAR; + } + } + + draw_set_vertex_info(st->draw, &vinfo); +#endif +} + + +/** + * Called by VBO to draw arrays when in selection or feedback mode and + * to implement glRasterPos. + * This is very much like the normal draw_vbo() function above. + * Look at code refactoring some day. + * Might move this into the failover module some day. + */ +void +st_feedback_draw_vbo(GLcontext *ctx, + const struct gl_client_array **arrays, + const struct _mesa_prim *prims, + GLuint nr_prims, + const struct _mesa_index_buffer *ib, + GLuint min_index, + GLuint max_index) +{ + struct st_context *st = ctx->st; + struct pipe_context *pipe = st->pipe; + struct draw_context *draw = st->draw; + const struct st_vertex_program *vp; + const struct pipe_shader_state *vs; + struct pipe_buffer *index_buffer_handle = 0; + struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS]; + struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS]; + GLuint attr, i; + ubyte *mapped_constants; + + assert(draw); + + st_validate_state(ctx->st); + + /* must get these after state validation! */ + vp = ctx->st->vp; + vs = &st->vp->state; + + if (!st->vp->draw_shader) { + st->vp->draw_shader = draw_create_vertex_shader(draw, vs); + } + + /* + * Set up the draw module's state. + * + * We'd like to do this less frequently, but the normal state-update + * code sends state updates to the pipe, not to our private draw module. + */ + assert(draw); + draw_set_viewport_state(draw, &st->state.viewport); + draw_set_clip_state(draw, &st->state.clip); + draw_set_rasterizer_state(draw, &st->state.rasterizer); + draw_bind_vertex_shader(draw, st->vp->draw_shader); + set_feedback_vertex_format(ctx); + + /* loop over TGSI shader inputs to determine vertex buffer + * and attribute info + */ + for (attr = 0; attr < vp->num_inputs; attr++) { + const GLuint mesaAttr = vp->index_to_input[attr]; + struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj; + void *map; + + if (bufobj && bufobj->Name) { + /* Attribute data is in a VBO. + * Recall that for VBOs, the gl_client_array->Ptr field is + * really an offset from the start of the VBO, not a pointer. + */ + struct st_buffer_object *stobj = st_buffer_object(bufobj); + assert(stobj->buffer); + + vbuffers[attr].buffer = NULL; + pipe_buffer_reference(pipe->screen, &vbuffers[attr].buffer, stobj->buffer); + vbuffers[attr].buffer_offset = (unsigned) arrays[0]->Ptr;/* in bytes */ + velements[attr].src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr; + } + else { + /* attribute data is in user-space memory, not a VBO */ + uint bytes = (arrays[mesaAttr]->Size + * _mesa_sizeof_type(arrays[mesaAttr]->Type) + * (max_index + 1)); + + /* wrap user data */ + vbuffers[attr].buffer + = pipe_user_buffer_create(pipe->screen, (void *) arrays[mesaAttr]->Ptr, + bytes); + vbuffers[attr].buffer_offset = 0; + velements[attr].src_offset = 0; + } + + /* common-case setup */ + vbuffers[attr].pitch = arrays[mesaAttr]->StrideB; /* in bytes */ + vbuffers[attr].max_index = max_index; + velements[attr].vertex_buffer_index = attr; + velements[attr].nr_components = arrays[mesaAttr]->Size; + velements[attr].src_format = pipe_vertex_format(arrays[mesaAttr]->Type, + arrays[mesaAttr]->Size, + arrays[mesaAttr]->Normalized); + assert(velements[attr].src_format); + + /* tell draw about this attribute */ +#if 0 + draw_set_vertex_buffer(draw, attr, &vbuffer[attr]); +#endif + + /* map the attrib buffer */ + map = pipe_buffer_map(pipe->screen, vbuffers[attr].buffer, + PIPE_BUFFER_USAGE_CPU_READ); + draw_set_mapped_vertex_buffer(draw, attr, map); + } + + draw_set_vertex_buffers(draw, vp->num_inputs, vbuffers); + draw_set_vertex_elements(draw, vp->num_inputs, velements); + + if (ib) { + unsigned indexSize; + struct gl_buffer_object *bufobj = ib->obj; + struct st_buffer_object *stobj = st_buffer_object(bufobj); + void *map; + + index_buffer_handle = stobj->buffer; + + switch (ib->type) { + case GL_UNSIGNED_INT: + indexSize = 4; + break; + case GL_UNSIGNED_SHORT: + indexSize = 2; + break; + default: + assert(0); + return; + } + + map = pipe_buffer_map(pipe->screen, index_buffer_handle, + PIPE_BUFFER_USAGE_CPU_READ); + draw_set_mapped_element_buffer(draw, indexSize, map); + } + else { + /* no index/element buffer */ + draw_set_mapped_element_buffer(draw, 0, NULL); + } + + + /* map constant buffers */ + mapped_constants = pipe_buffer_map(pipe->screen, + st->state.constants[PIPE_SHADER_VERTEX].buffer, + PIPE_BUFFER_USAGE_CPU_READ); + draw_set_mapped_constant_buffer(st->draw, mapped_constants, + st->state.constants[PIPE_SHADER_VERTEX].buffer->size); + + + /* draw here */ + for (i = 0; i < nr_prims; i++) { + draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count); + } + + + /* unmap constant buffers */ + pipe_buffer_unmap(pipe->screen, st->state.constants[PIPE_SHADER_VERTEX].buffer); + + /* + * unmap vertex/index buffers + */ + for (i = 0; i < PIPE_MAX_ATTRIBS; i++) { + if (draw->pt.vertex_buffer[i].buffer) { + pipe_buffer_unmap(pipe->screen, draw->pt.vertex_buffer[i].buffer); + pipe_buffer_reference(pipe->screen, &draw->pt.vertex_buffer[i].buffer, NULL); + draw_set_mapped_vertex_buffer(draw, i, NULL); + } + } + if (ib) { + pipe_buffer_unmap(pipe->screen, index_buffer_handle); + draw_set_mapped_element_buffer(draw, 0, NULL); + } +} + +#endif /* FEATURE_feedback || FEATURE_drawpix */ + + +void st_init_draw( struct st_context *st ) +{ + GLcontext *ctx = st->ctx; + + vbo_set_draw_func(ctx, st_draw_vbo); +} + + +void st_destroy_draw( struct st_context *st ) +{ +} + + |