[Mesa-dev] [PATCH 1/2] draw: use util_pstipple_create_fragment_shader
Brian Paul
brianp at vmware.com
Mon Feb 8 16:26:57 UTC 2016
On 02/08/2016 07:59 AM, Nicolai Hähnle wrote:
> Ping?
Looks good. For both:
Reviewed-by: Brian Paul <brianp at vmware.com>
>
> On 22.01.2016 11:56, Nicolai Hähnle wrote:
>> From: Nicolai Hähnle <nicolai.haehnle at amd.com>
>>
>> This reduces code duplication. It also adds support for drivers where the
>> fragment position is a system value.
>>
>> Suggested-by: Jose Fonseca <jfonseca at vmware.com>
>> ---
>> A basic polygon stippling test shows no regression on llvmpipe, but
>> that's
>> the extent of my testing.
>>
>> src/gallium/auxiliary/draw/draw_pipe_pstipple.c | 209
>> ++----------------------
>> 1 file changed, 12 insertions(+), 197 deletions(-)
>>
>> diff --git a/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
>> b/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
>> index cf52ca4..e468cc3 100644
>> --- a/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
>> +++ b/src/gallium/auxiliary/draw/draw_pipe_pstipple.c
>> @@ -43,10 +43,10 @@
>> #include "util/u_format.h"
>> #include "util/u_math.h"
>> #include "util/u_memory.h"
>> +#include "util/u_pstipple.h"
>> #include "util/u_sampler.h"
>>
>> #include "tgsi/tgsi_transform.h"
>> -#include "tgsi/tgsi_dump.h"
>>
>> #include "draw_context.h"
>> #include "draw_pipe.h"
>> @@ -114,178 +114,6 @@ struct pstip_stage
>> };
>>
>>
>> -
>> -/**
>> - * Subclass of tgsi_transform_context, used for transforming the
>> - * user's fragment shader to add the extra texture sample and
>> fragment kill
>> - * instructions.
>> - */
>> -struct pstip_transform_context {
>> - struct tgsi_transform_context base;
>> - uint tempsUsed; /**< bitmask */
>> - int wincoordInput;
>> - int maxInput;
>> - uint samplersUsed; /**< bitfield of samplers used */
>> - bool hasSview;
>> - int freeSampler; /** an available sampler for the pstipple */
>> - int texTemp; /**< temp registers */
>> - int numImmed;
>> -};
>> -
>> -
>> -/**
>> - * TGSI declaration transform callback.
>> - * Look for a free sampler, a free input attrib, and two free temp regs.
>> - */
>> -static void
>> -pstip_transform_decl(struct tgsi_transform_context *ctx,
>> - struct tgsi_full_declaration *decl)
>> -{
>> - struct pstip_transform_context *pctx = (struct
>> pstip_transform_context *) ctx;
>> -
>> - if (decl->Declaration.File == TGSI_FILE_SAMPLER) {
>> - uint i;
>> - for (i = decl->Range.First;
>> - i <= decl->Range.Last; i++) {
>> - pctx->samplersUsed |= 1 << i;
>> - }
>> - }
>> - else if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
>> - pctx->hasSview = true;
>> - }
>> - else if (decl->Declaration.File == TGSI_FILE_INPUT) {
>> - pctx->maxInput = MAX2(pctx->maxInput, (int) decl->Range.Last);
>> - if (decl->Semantic.Name == TGSI_SEMANTIC_POSITION)
>> - pctx->wincoordInput = (int) decl->Range.First;
>> - }
>> - else if (decl->Declaration.File == TGSI_FILE_TEMPORARY) {
>> - uint i;
>> - for (i = decl->Range.First;
>> - i <= decl->Range.Last; i++) {
>> - pctx->tempsUsed |= (1 << i);
>> - }
>> - }
>> -
>> - ctx->emit_declaration(ctx, decl);
>> -}
>> -
>> -
>> -/**
>> - * TGSI immediate declaration transform callback.
>> - * We're just counting the number of immediates here.
>> - */
>> -static void
>> -pstip_transform_immed(struct tgsi_transform_context *ctx,
>> - struct tgsi_full_immediate *immed)
>> -{
>> - struct pstip_transform_context *pctx = (struct
>> pstip_transform_context *) ctx;
>> - ctx->emit_immediate(ctx, immed); /* emit to output shader */
>> - pctx->numImmed++;
>> -}
>> -
>> -
>> -/**
>> - * Find the lowest zero bit in the given word, or -1 if bitfield is
>> all ones.
>> - */
>> -static int
>> -free_bit(uint bitfield)
>> -{
>> - return ffs(~bitfield) - 1;
>> -}
>> -
>> -
>> -/**
>> - * TGSI transform prolog callback.
>> - */
>> -static void
>> -pstip_transform_prolog(struct tgsi_transform_context *ctx)
>> -{
>> - struct pstip_transform_context *pctx = (struct
>> pstip_transform_context *) ctx;
>> - uint i;
>> - int wincoordInput;
>> -
>> - /* find free sampler */
>> - pctx->freeSampler = free_bit(pctx->samplersUsed);
>> - if (pctx->freeSampler >= PIPE_MAX_SAMPLERS)
>> - pctx->freeSampler = PIPE_MAX_SAMPLERS - 1;
>> -
>> - if (pctx->wincoordInput < 0)
>> - wincoordInput = pctx->maxInput + 1;
>> - else
>> - wincoordInput = pctx->wincoordInput;
>> -
>> - /* find one free temp reg */
>> - for (i = 0; i < 32; i++) {
>> - if ((pctx->tempsUsed & (1 << i)) == 0) {
>> - /* found a free temp */
>> - if (pctx->texTemp < 0)
>> - pctx->texTemp = i;
>> - else
>> - break;
>> - }
>> - }
>> - assert(pctx->texTemp >= 0);
>> -
>> - if (pctx->wincoordInput < 0) {
>> - /* declare new position input reg */
>> - tgsi_transform_input_decl(ctx, wincoordInput,
>> - TGSI_SEMANTIC_POSITION, 1,
>> - TGSI_INTERPOLATE_LINEAR);
>> - }
>> -
>> - /* declare new sampler */
>> - tgsi_transform_sampler_decl(ctx, pctx->freeSampler);
>> -
>> - /* if the src shader has SVIEW decl's for each SAMP decl, we
>> - * need to continue the trend and ensure there is a matching
>> - * SVIEW for the new SAMP we just created
>> - */
>> - if (pctx->hasSview) {
>> - tgsi_transform_sampler_view_decl(ctx,
>> - pctx->freeSampler,
>> - TGSI_TEXTURE_2D,
>> - TGSI_RETURN_TYPE_FLOAT);
>> - }
>> -
>> - /* declare new temp regs */
>> - tgsi_transform_temp_decl(ctx, pctx->texTemp);
>> -
>> - /* emit immediate = {1/32, 1/32, 1, 1}
>> - * The index/position of this immediate will be pctx->numImmed
>> - */
>> - tgsi_transform_immediate_decl(ctx, 1.0/32.0, 1.0/32.0, 1.0, 1.0);
>> -
>> - /*
>> - * Insert new MUL/TEX/KILL_IF instructions at start of program
>> - * Take gl_FragCoord, divide by 32 (stipple size), sample the
>> - * texture and kill fragment if needed.
>> - *
>> - * We'd like to use non-normalized texcoords to index into a RECT
>> - * texture, but we can only use GL_REPEAT wrap mode with normalized
>> - * texcoords. Darn.
>> - */
>> -
>> - /* MUL texTemp, INPUT[wincoord], 1/32; */
>> - tgsi_transform_op2_inst(ctx, TGSI_OPCODE_MUL,
>> - TGSI_FILE_TEMPORARY, pctx->texTemp,
>> - TGSI_WRITEMASK_XYZW,
>> - TGSI_FILE_INPUT, wincoordInput,
>> - TGSI_FILE_IMMEDIATE, pctx->numImmed);
>> -
>> - /* TEX texTemp, texTemp, sampler; */
>> - tgsi_transform_tex_2d_inst(ctx,
>> - TGSI_FILE_TEMPORARY, pctx->texTemp,
>> - TGSI_FILE_TEMPORARY, pctx->texTemp,
>> - pctx->freeSampler);
>> -
>> - /* KILL_IF -texTemp.wwww; # if -texTemp < 0, KILL fragment */
>> - tgsi_transform_kill_inst(ctx,
>> - TGSI_FILE_TEMPORARY, pctx->texTemp,
>> - TGSI_SWIZZLE_W, TRUE);
>> -}
>> -
>> -
>> -
>> /**
>> * Generate the frag shader we'll use for doing polygon stipple.
>> * This will be the user's shader prefixed with a TEX and KIL
>> instruction.
>> @@ -293,40 +121,27 @@ pstip_transform_prolog(struct
>> tgsi_transform_context *ctx)
>> static boolean
>> generate_pstip_fs(struct pstip_stage *pstip)
>> {
>> + struct pipe_context *pipe = pstip->pipe;
>> + struct pipe_screen *screen = pipe->screen;
>> const struct pipe_shader_state *orig_fs = &pstip->fs->state;
>> /*struct draw_context *draw = pstip->stage.draw;*/
>> struct pipe_shader_state pstip_fs;
>> - struct pstip_transform_context transform;
>> - const uint newLen = tgsi_num_tokens(orig_fs->tokens) +
>> NUM_NEW_TOKENS;
>> + enum tgsi_file_type wincoord_file;
>> +
>> + wincoord_file = screen->get_param(screen,
>> PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL) ?
>> + TGSI_FILE_SYSTEM_VALUE : TGSI_FILE_INPUT;
>>
>> pstip_fs = *orig_fs; /* copy to init */
>> - pstip_fs.tokens = tgsi_alloc_tokens(newLen);
>> + pstip_fs.tokens =
>> util_pstipple_create_fragment_shader(orig_fs->tokens,
>> +
>> &pstip->fs->sampler_unit,
>> + 0,
>> +
>> wincoord_file);
>> if (pstip_fs.tokens == NULL)
>> return FALSE;
>>
>> - memset(&transform, 0, sizeof(transform));
>> - transform.wincoordInput = -1;
>> - transform.maxInput = -1;
>> - transform.texTemp = -1;
>> - transform.base.prolog = pstip_transform_prolog;
>> - transform.base.transform_declaration = pstip_transform_decl;
>> - transform.base.transform_immediate = pstip_transform_immed;
>> -
>> - tgsi_transform_shader(orig_fs->tokens,
>> - (struct tgsi_token *) pstip_fs.tokens,
>> - newLen, &transform.base);
>> -
>> -#if 0 /* DEBUG */
>> - tgsi_dump(orig_fs->tokens, 0);
>> - tgsi_dump(pstip_fs.tokens, 0);
>> -#endif
>> -
>> - assert(pstip->fs);
>> -
>> - pstip->fs->sampler_unit = transform.freeSampler;
>> assert(pstip->fs->sampler_unit < PIPE_MAX_SAMPLERS);
>>
>> - pstip->fs->pstip_fs = pstip->driver_create_fs_state(pstip->pipe,
>> &pstip_fs);
>> + pstip->fs->pstip_fs = pstip->driver_create_fs_state(pipe, &pstip_fs);
>>
>> FREE((void *)pstip_fs.tokens);
>>
>>
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