diff options
Diffstat (limited to 'src/mesa/state_tracker/st_cb_bitmap.c')
| -rw-r--r-- | src/mesa/state_tracker/st_cb_bitmap.c | 791 |
1 files changed, 791 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cb_bitmap.c b/src/mesa/state_tracker/st_cb_bitmap.c new file mode 100644 index 0000000000..a0c305d66f --- /dev/null +++ b/src/mesa/state_tracker/st_cb_bitmap.c @@ -0,0 +1,791 @@ +/************************************************************************** + * + * 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 "main/texformat.h" +#include "shader/program.h" +#include "shader/prog_parameter.h" +#include "shader/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_cb_program.h" +#include "st_mesa_to_tgsi.h" +#include "st_texture.h" +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "pipe/p_inlines.h" +#include "util/u_tile.h" +#include "util/u_draw_quad.h" +#include "util/u_simple_shaders.h" +#include "shader/prog_instruction.h" +#include "cso_cache/cso_context.h" + + + +/** + * 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]; + + struct pipe_texture *texture; + struct pipe_surface *surf; + + GLboolean empty; + + /** An I8 texture image: */ + ubyte *buffer; +}; + + + + +/** + * 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(GLcontext *ctx, GLuint samplerIndex) +{ + 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; + p->Instructions[ic].SrcReg[0].Index = 0; + p->Instructions[ic].SrcReg[0].NegateBase = 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; + st_translate_fragment_program(ctx->st, stfp, NULL); + + 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(GLcontext *ctx) +{ + struct st_context *st = ctx->st; + 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, NULL); + } + + /* Ideally we'd have updated the pipe constants during the normal + * st/atom mechanism. But we can't since this is specific to glBitmap. + */ + st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT); + + return stfp->bitmap_program; +} + + +/** + * Copy user-provide bitmap bits into texture buffer, expanding + * bits into texels. + * "On" bits will set texels to 0xff. + * "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) +{ + GLint row, col; + +#define SET_PIXEL(COL, ROW) \ + destBuffer[(py + (ROW)) * destStride + px + (COL)] = 0x0; + + for (row = 0; row < height; row++) { + const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack, + bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0); + + if (unpack->LsbFirst) { + /* Lsb first */ + GLubyte mask = 1U << (unpack->SkipPixels & 0x7); + for (col = 0; col < width; col++) { + + if (*src & mask) { + SET_PIXEL(col, row); + } + + if (mask == 128U) { + src++; + mask = 1U; + } + else { + mask = mask << 1; + } + } + + /* get ready for next row */ + if (mask != 1) + src++; + } + else { + /* Msb first */ + GLubyte mask = 128U >> (unpack->SkipPixels & 0x7); + for (col = 0; col < width; col++) { + + if (*src & mask) { + SET_PIXEL(col, row); + } + + if (mask == 1U) { + src++; + mask = 128U; + } + else { + mask = mask >> 1; + } + } + + /* get ready for next row */ + if (mask != 128) + src++; + } + + } /* row */ + +#undef SET_PIXEL +} + + +/** + * Create a texture which represents a bitmap image. + */ +static struct pipe_texture * +make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, + const GLubyte *bitmap) +{ + struct pipe_context *pipe = ctx->st->pipe; + struct pipe_screen *screen = pipe->screen; + struct pipe_surface *surface; + ubyte *dest; + struct pipe_texture *pt; + + /* PBO source... */ + bitmap = _mesa_map_bitmap_pbo(ctx, unpack, bitmap); + if (!bitmap) { + return NULL; + } + + /** + * Create texture to hold bitmap pattern. + */ + pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, ctx->st->bitmap.tex_format, + 0, width, height, 1, 0, + PIPE_TEXTURE_USAGE_SAMPLER); + if (!pt) { + _mesa_unmap_bitmap_pbo(ctx, unpack); + return NULL; + } + + surface = screen->get_tex_surface(screen, pt, 0, 0, 0, + PIPE_BUFFER_USAGE_CPU_WRITE); + + /* map texture surface */ + dest = screen->surface_map(screen, surface, PIPE_BUFFER_USAGE_CPU_WRITE); + + /* Put image into texture surface */ + memset(dest, 0xff, height * surface->stride); + unpack_bitmap(ctx->st, 0, 0, width, height, unpack, bitmap, + dest, surface->stride); + + _mesa_unmap_bitmap_pbo(ctx, unpack); + + /* Release surface */ + screen->surface_unmap(screen, surface); + pipe_surface_reference(&surface, NULL); + + return pt; +} + + +static void +setup_bitmap_vertex_data(struct st_context *st, + 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); + const GLfloat sLeft = (GLfloat)0.0, sRight = (GLfloat)1.0; + const 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); + GLuint i; + void *buf; + + if (!st->bitmap.vbuf) { + st->bitmap.vbuf = pipe_buffer_create(pipe, 32, PIPE_BUFFER_USAGE_VERTEX, + 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 */ + buf = pipe_buffer_map(pipe, st->bitmap.vbuf, PIPE_BUFFER_USAGE_CPU_WRITE); + memcpy(buf, st->bitmap.vertices, sizeof(st->bitmap.vertices)); + pipe_buffer_unmap(pipe, st->bitmap.vbuf); +} + + + +/** + * Render a glBitmap by drawing a textured quad + */ +static void +draw_bitmap_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z, + GLsizei width, GLsizei height, + struct pipe_texture *pt, + const GLfloat *color) +{ + struct st_context *st = ctx->st; + struct pipe_context *pipe = ctx->st->pipe; + struct cso_context *cso = ctx->st->cso_context; + struct st_fragment_program *stfp; + GLuint maxSize; + + stfp = combined_bitmap_fragment_program(ctx); + + /* 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_sampler_textures(cso); + cso_save_viewport(cso); + cso_save_fragment_shader(cso); + cso_save_vertex_shader(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.sampler; + cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers); } + + /* user textures, plus the bitmap texture */ + { + struct pipe_texture *textures[PIPE_MAX_SAMPLERS]; + uint num = MAX2(stfp->bitmap_sampler + 1, st->state.num_textures); + memcpy(textures, st->state.sampler_texture, sizeof(textures)); + textures[stfp->bitmap_sampler] = pt; + cso_set_sampler_textures(cso, num, textures); + } + + /* 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] = 1.0f; + vp.scale[3] = 1.0f; + vp.translate[0] = 0.5f * width; + vp.translate[1] = 0.5f * height; + vp.translate[2] = 0.0f; + vp.translate[3] = 0.0f; + cso_set_viewport(cso, &vp); + } + + /* draw textured quad */ + setup_bitmap_vertex_data(st, x, y, width, height, + ctx->Current.RasterPos[2], + color); + + util_draw_vertex_buffer(pipe, st->bitmap.vbuf, + PIPE_PRIM_TRIANGLE_FAN, + 4, /* verts */ + 3); /* attribs/vert */ + + + /* restore state */ + cso_restore_rasterizer(cso); + cso_restore_samplers(cso); + cso_restore_sampler_textures(cso); + cso_restore_viewport(cso); + cso_restore_fragment_shader(cso); + cso_restore_vertex_shader(cso); +} + + +static void +reset_cache(struct st_context *st) +{ + struct pipe_context *pipe = st->pipe; + struct pipe_screen *screen = pipe->screen; + 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->surf) + screen->tex_surface_release(screen, &cache->surf); + + 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, 0, + PIPE_TEXTURE_USAGE_SAMPLER); + + /* Map the texture surface. + * Subsequent glBitmap calls will write into the texture image. + */ + cache->surf = screen->get_tex_surface(screen, cache->texture, 0, 0, 0, + PIPE_BUFFER_USAGE_CPU_WRITE); + cache->buffer = screen->surface_map(screen, cache->surf, + PIPE_BUFFER_USAGE_CPU_WRITE); + + /* init image to all 0xff */ + memset(cache->buffer, 0xff, BITMAP_CACHE_WIDTH * 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_screen *screen = pipe->screen; + + 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 surface has been mapped until now. + * So unmap and release the texture surface before drawing. + */ + screen->surface_unmap(screen, cache->surf); + cache->buffer = NULL; + + screen->tex_surface_release(screen, &cache->surf); + + draw_bitmap_quad(st->ctx, + cache->xpos, + cache->ypos, + st->ctx->Current.RasterPos[2], + BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT, + cache->texture, + cache->color); + } + + /* release/free the texture */ + pipe_texture_reference(&cache->texture, NULL); + + reset_cache(st); + } +} + + +/** + * 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; + + 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)) { + /* 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->empty = GL_FALSE; + COPY_4FV(cache->color, st->ctx->Current.RasterColor); + } + + assert(px != -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; + + 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(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, + const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap ) +{ + struct st_context *st = ctx->st; + struct pipe_texture *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, + &st->bitmap.vert_shader); + } + + if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap)) + return; + + pt = make_bitmap_texture(ctx, width, height, unpack, bitmap); + if (pt) { + assert(pt->target == PIPE_TEXTURE_2D); + draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2], + width, height, pt, + st->ctx->Current.RasterColor); + /* release/free the texture */ + pipe_texture_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.sampler; + 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; + sampler->normalized_coords = 1; + + /* init baseline rasterizer state once */ + memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer)); + st->bitmap.rasterizer.gl_rasterization_rules = 1; + st->bitmap.rasterizer.bypass_vs = 1; + + /* find a usable texture format */ + if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM, PIPE_TEXTURE_2D, + PIPE_TEXTURE_USAGE_SAMPLER, 0)) { + st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM; + } + else { + /* XXX support more formats */ + assert(0); + } + + /* alloc bitmap cache object */ + st->bitmap.cache = 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 pipe_screen *screen = pipe->screen; + struct bitmap_cache *cache = st->bitmap.cache; + + screen->surface_unmap(screen, cache->surf); + screen->tex_surface_release(screen, &cache->surf); + + if (st->bitmap.vs) { + cso_delete_vertex_shader(st->cso_context, st->bitmap.vs); + st->bitmap.vs = NULL; + } + + if (st->bitmap.vbuf) { + pipe_buffer_destroy(pipe, st->bitmap.vbuf); + st->bitmap.vbuf = NULL; + } + + if (st->bitmap.cache) { + pipe_texture_release(&st->bitmap.cache->texture); + FREE(st->bitmap.cache); + st->bitmap.cache = NULL; + } +} |