0,0 → 1,871 |
/************************************************************************** |
* |
* 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: |
* Brian Paul |
*/ |
|
#include "main/imports.h" |
#include "main/image.h" |
#include "main/bufferobj.h" |
#include "main/macros.h" |
#include "program/program.h" |
#include "program/prog_print.h" |
|
#include "st_context.h" |
#include "st_atom.h" |
#include "st_atom_constbuf.h" |
#include "st_program.h" |
#include "st_cb_bitmap.h" |
#include "st_texture.h" |
|
#include "pipe/p_context.h" |
#include "pipe/p_defines.h" |
#include "pipe/p_shader_tokens.h" |
#include "util/u_inlines.h" |
#include "util/u_draw_quad.h" |
#include "util/u_simple_shaders.h" |
#include "program/prog_instruction.h" |
#include "cso_cache/cso_context.h" |
|
|
#if FEATURE_drawpix |
|
/** |
* glBitmaps are drawn as textured quads. The user's bitmap pattern |
* is stored in a texture image. An alpha8 texture format is used. |
* The fragment shader samples a bit (texel) from the texture, then |
* discards the fragment if the bit is off. |
* |
* Note that we actually store the inverse image of the bitmap to |
* simplify the fragment program. An "on" bit gets stored as texel=0x0 |
* and an "off" bit is stored as texel=0xff. Then we kill the |
* fragment if the negated texel value is less than zero. |
*/ |
|
|
/** |
* The bitmap cache attempts to accumulate multiple glBitmap calls in a |
* buffer which is then rendered en mass upon a flush, state change, etc. |
* A wide, short buffer is used to target the common case of a series |
* of glBitmap calls being used to draw text. |
*/ |
static GLboolean UseBitmapCache = GL_TRUE; |
|
|
#define BITMAP_CACHE_WIDTH 512 |
#define BITMAP_CACHE_HEIGHT 32 |
|
struct bitmap_cache |
{ |
/** Window pos to render the cached image */ |
GLint xpos, ypos; |
/** Bounds of region used in window coords */ |
GLint xmin, ymin, xmax, ymax; |
|
GLfloat color[4]; |
|
/** Bitmap's Z position */ |
GLfloat zpos; |
|
struct pipe_resource *texture; |
struct pipe_transfer *trans; |
|
GLboolean empty; |
|
/** An I8 texture image: */ |
ubyte *buffer; |
}; |
|
|
/** Epsilon for Z comparisons */ |
#define Z_EPSILON 1e-06 |
|
|
/** |
* Make fragment program for glBitmap: |
* Sample the texture and kill the fragment if the bit is 0. |
* This program will be combined with the user's fragment program. |
*/ |
static struct st_fragment_program * |
make_bitmap_fragment_program(struct gl_context *ctx, GLuint samplerIndex) |
{ |
struct st_context *st = st_context(ctx); |
struct st_fragment_program *stfp; |
struct gl_program *p; |
GLuint ic = 0; |
|
p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); |
if (!p) |
return NULL; |
|
p->NumInstructions = 3; |
|
p->Instructions = _mesa_alloc_instructions(p->NumInstructions); |
if (!p->Instructions) { |
ctx->Driver.DeleteProgram(ctx, p); |
return NULL; |
} |
_mesa_init_instructions(p->Instructions, p->NumInstructions); |
|
/* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */ |
p->Instructions[ic].Opcode = OPCODE_TEX; |
p->Instructions[ic].DstReg.File = PROGRAM_TEMPORARY; |
p->Instructions[ic].DstReg.Index = 0; |
p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; |
p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; |
p->Instructions[ic].TexSrcUnit = samplerIndex; |
p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; |
ic++; |
|
/* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */ |
p->Instructions[ic].Opcode = OPCODE_KIL; |
p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY; |
|
if (st->bitmap.tex_format == PIPE_FORMAT_L8_UNORM) |
p->Instructions[ic].SrcReg[0].Swizzle = SWIZZLE_XXXX; |
|
p->Instructions[ic].SrcReg[0].Index = 0; |
p->Instructions[ic].SrcReg[0].Negate = NEGATE_XYZW; |
ic++; |
|
/* END; */ |
p->Instructions[ic++].Opcode = OPCODE_END; |
|
assert(ic == p->NumInstructions); |
|
p->InputsRead = FRAG_BIT_TEX0; |
p->OutputsWritten = 0x0; |
p->SamplersUsed = (1 << samplerIndex); |
|
stfp = (struct st_fragment_program *) p; |
stfp->Base.UsesKill = GL_TRUE; |
|
return stfp; |
} |
|
|
static int |
find_free_bit(uint bitfield) |
{ |
int i; |
for (i = 0; i < 32; i++) { |
if ((bitfield & (1 << i)) == 0) { |
return i; |
} |
} |
return -1; |
} |
|
|
/** |
* Combine basic bitmap fragment program with the user-defined program. |
*/ |
static struct st_fragment_program * |
combined_bitmap_fragment_program(struct gl_context *ctx) |
{ |
struct st_context *st = st_context(ctx); |
struct st_fragment_program *stfp = st->fp; |
|
if (!stfp->bitmap_program) { |
/* |
* Generate new program which is the user-defined program prefixed |
* with the bitmap sampler/kill instructions. |
*/ |
struct st_fragment_program *bitmap_prog; |
uint sampler; |
|
sampler = find_free_bit(st->fp->Base.Base.SamplersUsed); |
bitmap_prog = make_bitmap_fragment_program(ctx, sampler); |
|
stfp->bitmap_program = (struct st_fragment_program *) |
_mesa_combine_programs(ctx, |
&bitmap_prog->Base.Base, &stfp->Base.Base); |
stfp->bitmap_program->bitmap_sampler = sampler; |
|
/* done with this after combining */ |
st_reference_fragprog(st, &bitmap_prog, NULL); |
|
#if 0 |
{ |
struct gl_program *p = &stfp->bitmap_program->Base.Base; |
printf("Combined bitmap program:\n"); |
_mesa_print_program(p); |
printf("InputsRead: 0x%x\n", p->InputsRead); |
printf("OutputsWritten: 0x%x\n", p->OutputsWritten); |
_mesa_print_parameter_list(p->Parameters); |
} |
#endif |
|
/* translate to TGSI tokens */ |
st_translate_fragment_program(st, stfp->bitmap_program); |
} |
|
return stfp->bitmap_program; |
} |
|
|
/** |
* Copy user-provide bitmap bits into texture buffer, expanding |
* bits into texels. |
* "On" bits will set texels to 0x0. |
* "Off" bits will not modify texels. |
* Note that the image is actually going to be upside down in |
* the texture. We deal with that with texcoords. |
*/ |
static void |
unpack_bitmap(struct st_context *st, |
GLint px, GLint py, GLsizei width, GLsizei height, |
const struct gl_pixelstore_attrib *unpack, |
const GLubyte *bitmap, |
ubyte *destBuffer, uint destStride) |
{ |
destBuffer += py * destStride + px; |
|
_mesa_expand_bitmap(width, height, unpack, bitmap, |
destBuffer, destStride, 0x0); |
} |
|
|
/** |
* Create a texture which represents a bitmap image. |
*/ |
static struct pipe_resource * |
make_bitmap_texture(struct gl_context *ctx, GLsizei width, GLsizei height, |
const struct gl_pixelstore_attrib *unpack, |
const GLubyte *bitmap) |
{ |
struct st_context *st = st_context(ctx); |
struct pipe_context *pipe = st->pipe; |
struct pipe_transfer *transfer; |
ubyte *dest; |
struct pipe_resource *pt; |
|
/* PBO source... */ |
bitmap = _mesa_map_pbo_source(ctx, unpack, bitmap); |
if (!bitmap) { |
return NULL; |
} |
|
/** |
* Create texture to hold bitmap pattern. |
*/ |
pt = st_texture_create(st, st->internal_target, st->bitmap.tex_format, |
0, width, height, 1, |
PIPE_BIND_SAMPLER_VIEW); |
if (!pt) { |
_mesa_unmap_pbo_source(ctx, unpack); |
return NULL; |
} |
|
transfer = pipe_get_transfer(st->pipe, pt, 0, 0, |
PIPE_TRANSFER_WRITE, |
0, 0, width, height); |
|
dest = pipe_transfer_map(pipe, transfer); |
|
/* Put image into texture transfer */ |
memset(dest, 0xff, height * transfer->stride); |
unpack_bitmap(st, 0, 0, width, height, unpack, bitmap, |
dest, transfer->stride); |
|
_mesa_unmap_pbo_source(ctx, unpack); |
|
/* Release transfer */ |
pipe_transfer_unmap(pipe, transfer); |
pipe->transfer_destroy(pipe, transfer); |
|
return pt; |
} |
|
static GLuint |
setup_bitmap_vertex_data(struct st_context *st, bool normalized, |
int x, int y, int width, int height, |
float z, const float color[4]) |
{ |
struct pipe_context *pipe = st->pipe; |
const struct gl_framebuffer *fb = st->ctx->DrawBuffer; |
const GLfloat fb_width = (GLfloat)fb->Width; |
const GLfloat fb_height = (GLfloat)fb->Height; |
const GLfloat x0 = (GLfloat)x; |
const GLfloat x1 = (GLfloat)(x + width); |
const GLfloat y0 = (GLfloat)y; |
const GLfloat y1 = (GLfloat)(y + height); |
GLfloat sLeft = (GLfloat)0.0, sRight = (GLfloat)1.0; |
GLfloat tTop = (GLfloat)0.0, tBot = (GLfloat)1.0 - tTop; |
const GLfloat clip_x0 = (GLfloat)(x0 / fb_width * 2.0 - 1.0); |
const GLfloat clip_y0 = (GLfloat)(y0 / fb_height * 2.0 - 1.0); |
const GLfloat clip_x1 = (GLfloat)(x1 / fb_width * 2.0 - 1.0); |
const GLfloat clip_y1 = (GLfloat)(y1 / fb_height * 2.0 - 1.0); |
const GLuint max_slots = 1; /* 4096 / sizeof(st->bitmap.vertices); */ |
GLuint i; |
|
if(!normalized) |
{ |
sRight = width; |
tBot = height; |
} |
|
/* XXX: Need to improve buffer_write to allow NO_WAIT (as well as |
* no_flush) updates to buffers where we know there is no conflict |
* with previous data. Currently using max_slots > 1 will cause |
* synchronous rendering if the driver flushes its command buffers |
* between one bitmap and the next. Our flush hook below isn't |
* sufficient to catch this as the driver doesn't tell us when it |
* flushes its own command buffers. Until this gets fixed, pay the |
* price of allocating a new buffer for each bitmap cache-flush to |
* avoid synchronous rendering. |
*/ |
if (st->bitmap.vbuf_slot >= max_slots) { |
pipe_resource_reference(&st->bitmap.vbuf, NULL); |
st->bitmap.vbuf_slot = 0; |
} |
|
if (!st->bitmap.vbuf) { |
st->bitmap.vbuf = pipe_buffer_create(pipe->screen, |
PIPE_BIND_VERTEX_BUFFER, |
max_slots * sizeof(st->bitmap.vertices)); |
} |
|
/* Positions are in clip coords since we need to do clipping in case |
* the bitmap quad goes beyond the window bounds. |
*/ |
st->bitmap.vertices[0][0][0] = clip_x0; |
st->bitmap.vertices[0][0][1] = clip_y0; |
st->bitmap.vertices[0][2][0] = sLeft; |
st->bitmap.vertices[0][2][1] = tTop; |
|
st->bitmap.vertices[1][0][0] = clip_x1; |
st->bitmap.vertices[1][0][1] = clip_y0; |
st->bitmap.vertices[1][2][0] = sRight; |
st->bitmap.vertices[1][2][1] = tTop; |
|
st->bitmap.vertices[2][0][0] = clip_x1; |
st->bitmap.vertices[2][0][1] = clip_y1; |
st->bitmap.vertices[2][2][0] = sRight; |
st->bitmap.vertices[2][2][1] = tBot; |
|
st->bitmap.vertices[3][0][0] = clip_x0; |
st->bitmap.vertices[3][0][1] = clip_y1; |
st->bitmap.vertices[3][2][0] = sLeft; |
st->bitmap.vertices[3][2][1] = tBot; |
|
/* same for all verts: */ |
for (i = 0; i < 4; i++) { |
st->bitmap.vertices[i][0][2] = z; |
st->bitmap.vertices[i][0][3] = 1.0; |
st->bitmap.vertices[i][1][0] = color[0]; |
st->bitmap.vertices[i][1][1] = color[1]; |
st->bitmap.vertices[i][1][2] = color[2]; |
st->bitmap.vertices[i][1][3] = color[3]; |
st->bitmap.vertices[i][2][2] = 0.0; /*R*/ |
st->bitmap.vertices[i][2][3] = 1.0; /*Q*/ |
} |
|
/* put vertex data into vbuf */ |
pipe_buffer_write_nooverlap(st->pipe, |
st->bitmap.vbuf, |
st->bitmap.vbuf_slot * sizeof st->bitmap.vertices, |
sizeof st->bitmap.vertices, |
st->bitmap.vertices); |
|
return st->bitmap.vbuf_slot++ * sizeof st->bitmap.vertices; |
} |
|
|
|
/** |
* Render a glBitmap by drawing a textured quad |
*/ |
static void |
draw_bitmap_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z, |
GLsizei width, GLsizei height, |
struct pipe_sampler_view *sv, |
const GLfloat *color) |
{ |
struct st_context *st = st_context(ctx); |
struct pipe_context *pipe = st->pipe; |
struct cso_context *cso = st->cso_context; |
struct st_fragment_program *stfp; |
GLuint maxSize; |
GLuint offset; |
|
stfp = combined_bitmap_fragment_program(ctx); |
|
/* As an optimization, Mesa's fragment programs will sometimes get the |
* primary color from a statevar/constant rather than a varying variable. |
* when that's the case, we need to ensure that we use the 'color' |
* parameter and not the current attribute color (which may have changed |
* through glRasterPos and state validation. |
* So, we force the proper color here. Not elegant, but it works. |
*/ |
{ |
GLfloat colorSave[4]; |
COPY_4V(colorSave, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]); |
COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color); |
st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT); |
COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], colorSave); |
} |
|
|
/* limit checks */ |
/* XXX if the bitmap is larger than the max texture size, break |
* it up into chunks. |
*/ |
maxSize = 1 << (pipe->screen->get_param(pipe->screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); |
assert(width <= (GLsizei)maxSize); |
assert(height <= (GLsizei)maxSize); |
|
cso_save_rasterizer(cso); |
cso_save_samplers(cso); |
cso_save_fragment_sampler_views(cso); |
cso_save_viewport(cso); |
cso_save_fragment_shader(cso); |
cso_save_vertex_shader(cso); |
cso_save_vertex_elements(cso); |
|
/* rasterizer state: just scissor */ |
st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled; |
cso_set_rasterizer(cso, &st->bitmap.rasterizer); |
|
/* fragment shader state: TEX lookup program */ |
cso_set_fragment_shader_handle(cso, stfp->driver_shader); |
|
/* vertex shader state: position + texcoord pass-through */ |
cso_set_vertex_shader_handle(cso, st->bitmap.vs); |
|
/* user samplers, plus our bitmap sampler */ |
{ |
struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; |
uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_samplers); |
uint i; |
for (i = 0; i < st->state.num_samplers; i++) { |
samplers[i] = &st->state.samplers[i]; |
} |
samplers[stfp->bitmap_sampler] = &st->bitmap.samplers[sv->texture->target != PIPE_TEXTURE_RECT]; |
cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); |
} |
|
/* user textures, plus the bitmap texture */ |
{ |
struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; |
uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_textures); |
memcpy(sampler_views, st->state.sampler_views, sizeof(sampler_views)); |
sampler_views[stfp->bitmap_sampler] = sv; |
cso_set_fragment_sampler_views(cso, num, sampler_views); |
} |
|
/* viewport state: viewport matching window dims */ |
{ |
const struct gl_framebuffer *fb = st->ctx->DrawBuffer; |
const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); |
const GLfloat width = (GLfloat)fb->Width; |
const GLfloat height = (GLfloat)fb->Height; |
struct pipe_viewport_state vp; |
vp.scale[0] = 0.5f * width; |
vp.scale[1] = height * (invert ? -0.5f : 0.5f); |
vp.scale[2] = 0.5f; |
vp.scale[3] = 1.0f; |
vp.translate[0] = 0.5f * width; |
vp.translate[1] = 0.5f * height; |
vp.translate[2] = 0.5f; |
vp.translate[3] = 0.0f; |
cso_set_viewport(cso, &vp); |
} |
|
cso_set_vertex_elements(cso, 3, st->velems_util_draw); |
|
/* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ |
z = z * 2.0 - 1.0; |
|
/* draw textured quad */ |
offset = setup_bitmap_vertex_data(st, sv->texture->target != PIPE_TEXTURE_RECT, x, y, width, height, z, color); |
|
util_draw_vertex_buffer(pipe, st->bitmap.vbuf, offset, |
PIPE_PRIM_TRIANGLE_FAN, |
4, /* verts */ |
3); /* attribs/vert */ |
|
|
/* restore state */ |
cso_restore_rasterizer(cso); |
cso_restore_samplers(cso); |
cso_restore_fragment_sampler_views(cso); |
cso_restore_viewport(cso); |
cso_restore_fragment_shader(cso); |
cso_restore_vertex_shader(cso); |
cso_restore_vertex_elements(cso); |
} |
|
|
static void |
reset_cache(struct st_context *st) |
{ |
struct pipe_context *pipe = st->pipe; |
struct bitmap_cache *cache = st->bitmap.cache; |
|
/*memset(cache->buffer, 0xff, sizeof(cache->buffer));*/ |
cache->empty = GL_TRUE; |
|
cache->xmin = 1000000; |
cache->xmax = -1000000; |
cache->ymin = 1000000; |
cache->ymax = -1000000; |
|
if (cache->trans) { |
pipe->transfer_destroy(pipe, cache->trans); |
cache->trans = NULL; |
} |
|
assert(!cache->texture); |
|
/* allocate a new texture */ |
cache->texture = st_texture_create(st, PIPE_TEXTURE_2D, |
st->bitmap.tex_format, 0, |
BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, |
1, |
PIPE_BIND_SAMPLER_VIEW); |
} |
|
|
/** Print bitmap image to stdout (debug) */ |
static void |
print_cache(const struct bitmap_cache *cache) |
{ |
int i, j, k; |
|
for (i = 0; i < BITMAP_CACHE_HEIGHT; i++) { |
k = BITMAP_CACHE_WIDTH * (BITMAP_CACHE_HEIGHT - i - 1); |
for (j = 0; j < BITMAP_CACHE_WIDTH; j++) { |
if (cache->buffer[k]) |
printf("X"); |
else |
printf(" "); |
k++; |
} |
printf("\n"); |
} |
} |
|
|
static void |
create_cache_trans(struct st_context *st) |
{ |
struct pipe_context *pipe = st->pipe; |
struct bitmap_cache *cache = st->bitmap.cache; |
|
if (cache->trans) |
return; |
|
/* Map the texture transfer. |
* Subsequent glBitmap calls will write into the texture image. |
*/ |
cache->trans = pipe_get_transfer(st->pipe, cache->texture, 0, 0, |
PIPE_TRANSFER_WRITE, 0, 0, |
BITMAP_CACHE_WIDTH, |
BITMAP_CACHE_HEIGHT); |
cache->buffer = pipe_transfer_map(pipe, cache->trans); |
|
/* init image to all 0xff */ |
memset(cache->buffer, 0xff, cache->trans->stride * BITMAP_CACHE_HEIGHT); |
} |
|
|
/** |
* If there's anything in the bitmap cache, draw/flush it now. |
*/ |
void |
st_flush_bitmap_cache(struct st_context *st) |
{ |
if (!st->bitmap.cache->empty) { |
struct bitmap_cache *cache = st->bitmap.cache; |
|
if (st->ctx->DrawBuffer) { |
struct pipe_context *pipe = st->pipe; |
struct pipe_sampler_view *sv; |
|
assert(cache->xmin <= cache->xmax); |
|
/* printf("flush size %d x %d at %d, %d\n", |
cache->xmax - cache->xmin, |
cache->ymax - cache->ymin, |
cache->xpos, cache->ypos); |
*/ |
|
/* The texture transfer has been mapped until now. |
* So unmap and release the texture transfer before drawing. |
*/ |
if (cache->trans) { |
if (0) |
print_cache(cache); |
pipe_transfer_unmap(pipe, cache->trans); |
cache->buffer = NULL; |
|
pipe->transfer_destroy(pipe, cache->trans); |
cache->trans = NULL; |
} |
|
sv = st_create_texture_sampler_view(st->pipe, cache->texture); |
if (sv) { |
draw_bitmap_quad(st->ctx, |
cache->xpos, |
cache->ypos, |
cache->zpos, |
BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, |
sv, |
cache->color); |
|
pipe_sampler_view_reference(&sv, NULL); |
} |
} |
|
/* release/free the texture */ |
pipe_resource_reference(&cache->texture, NULL); |
|
reset_cache(st); |
} |
} |
|
/* Flush bitmap cache and release vertex buffer. |
*/ |
void |
st_flush_bitmap( struct st_context *st ) |
{ |
st_flush_bitmap_cache(st); |
|
/* Release vertex buffer to avoid synchronous rendering if we were |
* to map it in the next frame. |
*/ |
pipe_resource_reference(&st->bitmap.vbuf, NULL); |
st->bitmap.vbuf_slot = 0; |
} |
|
|
/** |
* Try to accumulate this glBitmap call in the bitmap cache. |
* \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc. |
*/ |
static GLboolean |
accum_bitmap(struct st_context *st, |
GLint x, GLint y, GLsizei width, GLsizei height, |
const struct gl_pixelstore_attrib *unpack, |
const GLubyte *bitmap ) |
{ |
struct bitmap_cache *cache = st->bitmap.cache; |
int px = -999, py = -999; |
const GLfloat z = st->ctx->Current.RasterPos[2]; |
|
if (width > BITMAP_CACHE_WIDTH || |
height > BITMAP_CACHE_HEIGHT) |
return GL_FALSE; /* too big to cache */ |
|
if (!cache->empty) { |
px = x - cache->xpos; /* pos in buffer */ |
py = y - cache->ypos; |
if (px < 0 || px + width > BITMAP_CACHE_WIDTH || |
py < 0 || py + height > BITMAP_CACHE_HEIGHT || |
!TEST_EQ_4V(st->ctx->Current.RasterColor, cache->color) || |
((fabs(z - cache->zpos) > Z_EPSILON))) { |
/* This bitmap would extend beyond cache bounds, or the bitmap |
* color is changing |
* so flush and continue. |
*/ |
st_flush_bitmap_cache(st); |
} |
} |
|
if (cache->empty) { |
/* Initialize. Center bitmap vertically in the buffer. */ |
px = 0; |
py = (BITMAP_CACHE_HEIGHT - height) / 2; |
cache->xpos = x; |
cache->ypos = y - py; |
cache->zpos = z; |
cache->empty = GL_FALSE; |
COPY_4FV(cache->color, st->ctx->Current.RasterColor); |
} |
|
assert(px != -999); |
assert(py != -999); |
|
if (x < cache->xmin) |
cache->xmin = x; |
if (y < cache->ymin) |
cache->ymin = y; |
if (x + width > cache->xmax) |
cache->xmax = x + width; |
if (y + height > cache->ymax) |
cache->ymax = y + height; |
|
/* create the transfer if needed */ |
create_cache_trans(st); |
|
unpack_bitmap(st, px, py, width, height, unpack, bitmap, |
cache->buffer, BITMAP_CACHE_WIDTH); |
|
return GL_TRUE; /* accumulated */ |
} |
|
|
|
/** |
* Called via ctx->Driver.Bitmap() |
*/ |
static void |
st_Bitmap(struct gl_context *ctx, GLint x, GLint y, GLsizei width, GLsizei height, |
const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) |
{ |
struct st_context *st = st_context(ctx); |
struct pipe_resource *pt; |
|
if (width == 0 || height == 0) |
return; |
|
st_validate_state(st); |
|
if (!st->bitmap.vs) { |
/* create pass-through vertex shader now */ |
const uint semantic_names[] = { TGSI_SEMANTIC_POSITION, |
TGSI_SEMANTIC_COLOR, |
TGSI_SEMANTIC_GENERIC }; |
const uint semantic_indexes[] = { 0, 0, 0 }; |
st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3, |
semantic_names, |
semantic_indexes); |
} |
|
if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) |
return; |
|
pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); |
if (pt) { |
struct pipe_sampler_view *sv = st_create_texture_sampler_view(st->pipe, pt); |
|
assert(pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT); |
|
if (sv) { |
draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], |
width, height, sv, |
st->ctx->Current.RasterColor); |
|
pipe_sampler_view_reference(&sv, NULL); |
} |
|
/* release/free the texture */ |
pipe_resource_reference(&pt, NULL); |
} |
} |
|
|
/** Per-context init */ |
void |
st_init_bitmap_functions(struct dd_function_table *functions) |
{ |
functions->Bitmap = st_Bitmap; |
} |
|
|
/** Per-context init */ |
void |
st_init_bitmap(struct st_context *st) |
{ |
struct pipe_sampler_state *sampler = &st->bitmap.samplers[0]; |
struct pipe_context *pipe = st->pipe; |
struct pipe_screen *screen = pipe->screen; |
|
/* init sampler state once */ |
memset(sampler, 0, sizeof(*sampler)); |
sampler->wrap_s = PIPE_TEX_WRAP_CLAMP; |
sampler->wrap_t = PIPE_TEX_WRAP_CLAMP; |
sampler->wrap_r = PIPE_TEX_WRAP_CLAMP; |
sampler->min_img_filter = PIPE_TEX_FILTER_NEAREST; |
sampler->min_mip_filter = PIPE_TEX_MIPFILTER_NONE; |
sampler->mag_img_filter = PIPE_TEX_FILTER_NEAREST; |
st->bitmap.samplers[1] = *sampler; |
st->bitmap.samplers[1].normalized_coords = 1; |
|
/* init baseline rasterizer state once */ |
memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); |
st->bitmap.rasterizer.gl_rasterization_rules = 1; |
|
/* find a usable texture format */ |
if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM, PIPE_TEXTURE_2D, 0, |
PIPE_BIND_SAMPLER_VIEW, 0)) { |
st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM; |
} |
else if (screen->is_format_supported(screen, PIPE_FORMAT_A8_UNORM, PIPE_TEXTURE_2D, 0, |
PIPE_BIND_SAMPLER_VIEW, 0)) { |
st->bitmap.tex_format = PIPE_FORMAT_A8_UNORM; |
} |
else if (screen->is_format_supported(screen, PIPE_FORMAT_L8_UNORM, PIPE_TEXTURE_2D, 0, |
PIPE_BIND_SAMPLER_VIEW, 0)) { |
st->bitmap.tex_format = PIPE_FORMAT_L8_UNORM; |
} |
else { |
/* XXX support more formats */ |
assert(0); |
} |
|
/* alloc bitmap cache object */ |
st->bitmap.cache = ST_CALLOC_STRUCT(bitmap_cache); |
|
reset_cache(st); |
} |
|
|
/** Per-context tear-down */ |
void |
st_destroy_bitmap(struct st_context *st) |
{ |
struct pipe_context *pipe = st->pipe; |
struct bitmap_cache *cache = st->bitmap.cache; |
|
|
|
if (st->bitmap.vs) { |
cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); |
st->bitmap.vs = NULL; |
} |
|
if (st->bitmap.vbuf) { |
pipe_resource_reference(&st->bitmap.vbuf, NULL); |
st->bitmap.vbuf = NULL; |
} |
|
if (cache) { |
if (cache->trans) { |
pipe_transfer_unmap(pipe, cache->trans); |
pipe->transfer_destroy(pipe, cache->trans); |
} |
pipe_resource_reference(&st->bitmap.cache->texture, NULL); |
free(st->bitmap.cache); |
st->bitmap.cache = NULL; |
} |
} |
|
#endif /* FEATURE_drawpix */ |