| /************************************************************************** |
| * |
| * Copyright 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, 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 VMWARE 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. |
| * |
| **************************************************************************/ |
| |
| #include "shader.h" |
| |
| #include "vg_context.h" |
| #include "shaders_cache.h" |
| #include "paint.h" |
| #include "mask.h" |
| #include "image.h" |
| #include "renderer.h" |
| |
| #include "pipe/p_context.h" |
| #include "pipe/p_state.h" |
| #include "util/u_memory.h" |
| #include "util/u_math.h" |
| #include "util/u_format.h" |
| |
| #define MAX_CONSTANTS 28 |
| |
| struct shader { |
| struct vg_context *context; |
| |
| VGboolean color_transform; |
| VGboolean masking; |
| struct vg_paint *paint; |
| struct vg_image *image; |
| |
| struct matrix modelview; |
| struct matrix paint_matrix; |
| |
| VGboolean drawing_image; |
| VGImageMode image_mode; |
| |
| float constants[MAX_CONSTANTS]; |
| struct pipe_resource *cbuf; |
| struct pipe_shader_state fs_state; |
| void *fs; |
| }; |
| |
| struct shader * shader_create(struct vg_context *ctx) |
| { |
| struct shader *shader = 0; |
| |
| shader = CALLOC_STRUCT(shader); |
| shader->context = ctx; |
| |
| return shader; |
| } |
| |
| void shader_destroy(struct shader *shader) |
| { |
| FREE(shader); |
| } |
| |
| void shader_set_color_transform(struct shader *shader, VGboolean set) |
| { |
| shader->color_transform = set; |
| } |
| |
| void shader_set_masking(struct shader *shader, VGboolean set) |
| { |
| shader->masking = set; |
| } |
| |
| VGboolean shader_is_masking(struct shader *shader) |
| { |
| return shader->masking; |
| } |
| |
| void shader_set_paint(struct shader *shader, struct vg_paint *paint) |
| { |
| shader->paint = paint; |
| } |
| |
| struct vg_paint * shader_paint(struct shader *shader) |
| { |
| return shader->paint; |
| } |
| |
| static VGint setup_constant_buffer(struct shader *shader) |
| { |
| const struct vg_state *state = &shader->context->state.vg; |
| VGint param_bytes = paint_constant_buffer_size(shader->paint); |
| VGint i; |
| |
| param_bytes += sizeof(VGfloat) * 8; |
| assert(param_bytes <= sizeof(shader->constants)); |
| |
| if (state->color_transform) { |
| for (i = 0; i < 8; i++) { |
| VGfloat val = (i < 4) ? 127.0f : 1.0f; |
| shader->constants[i] = |
| CLAMP(state->color_transform_values[i], -val, val); |
| } |
| } |
| else { |
| memset(shader->constants, 0, sizeof(VGfloat) * 8); |
| } |
| |
| paint_fill_constant_buffer(shader->paint, |
| &shader->paint_matrix, shader->constants + 8); |
| |
| return param_bytes; |
| } |
| |
| static VGboolean blend_use_shader(struct shader *shader) |
| { |
| struct vg_context *ctx = shader->context; |
| VGboolean advanced_blending; |
| |
| switch (ctx->state.vg.blend_mode) { |
| case VG_BLEND_DST_OVER: |
| case VG_BLEND_MULTIPLY: |
| case VG_BLEND_SCREEN: |
| case VG_BLEND_DARKEN: |
| case VG_BLEND_LIGHTEN: |
| case VG_BLEND_ADDITIVE: |
| advanced_blending = VG_TRUE; |
| break; |
| case VG_BLEND_SRC_OVER: |
| if (util_format_has_alpha(ctx->draw_buffer->strb->format)) { |
| /* no blending is required if the paints and the image are opaque */ |
| advanced_blending = !paint_is_opaque(ctx->state.vg.fill_paint) || |
| !paint_is_opaque(ctx->state.vg.stroke_paint); |
| if (!advanced_blending && shader->drawing_image) { |
| advanced_blending = |
| util_format_has_alpha(shader->image->sampler_view->format); |
| } |
| break; |
| } |
| /* fall through */ |
| default: |
| advanced_blending = VG_FALSE; |
| break; |
| } |
| |
| return advanced_blending; |
| } |
| |
| static VGint blend_bind_samplers(struct shader *shader, |
| struct pipe_sampler_state **samplers, |
| struct pipe_sampler_view **sampler_views) |
| { |
| if (blend_use_shader(shader)) { |
| struct vg_context *ctx = shader->context; |
| |
| samplers[2] = &ctx->blend_sampler; |
| sampler_views[2] = vg_prepare_blend_surface(ctx); |
| |
| if (!samplers[0] || !sampler_views[0]) { |
| samplers[0] = samplers[2]; |
| sampler_views[0] = sampler_views[2]; |
| } |
| if (!samplers[1] || !sampler_views[1]) { |
| samplers[1] = samplers[0]; |
| sampler_views[1] = sampler_views[0]; |
| } |
| |
| return 1; |
| } |
| return 0; |
| } |
| |
| static VGint setup_samplers(struct shader *shader, |
| struct pipe_sampler_state **samplers, |
| struct pipe_sampler_view **sampler_views) |
| { |
| /* a little wonky: we use the num as a boolean that just says |
| * whether any sampler/textures have been set. the actual numbering |
| * for samplers is always the same: |
| * 0 - paint sampler/texture for gradient/pattern |
| * 1 - mask sampler/texture |
| * 2 - blend sampler/texture |
| * 3 - image sampler/texture |
| * */ |
| VGint num = 0; |
| |
| samplers[0] = NULL; |
| samplers[1] = NULL; |
| samplers[2] = NULL; |
| samplers[3] = NULL; |
| sampler_views[0] = NULL; |
| sampler_views[1] = NULL; |
| sampler_views[2] = NULL; |
| sampler_views[3] = NULL; |
| |
| num += paint_bind_samplers(shader->paint, samplers, sampler_views); |
| num += mask_bind_samplers(samplers, sampler_views); |
| num += blend_bind_samplers(shader, samplers, sampler_views); |
| if (shader->drawing_image && shader->image) |
| num += image_bind_samplers(shader->image, samplers, sampler_views); |
| |
| return (num) ? 4 : 0; |
| } |
| |
| static INLINE VGboolean is_format_bw(struct shader *shader) |
| { |
| #if 0 |
| struct vg_context *ctx = shader->context; |
| struct st_framebuffer *stfb = ctx->draw_buffer; |
| #endif |
| |
| if (shader->drawing_image && shader->image) { |
| if (shader->image->format == VG_BW_1) |
| return VG_TRUE; |
| } |
| |
| return VG_FALSE; |
| } |
| |
| static void setup_shader_program(struct shader *shader) |
| { |
| struct vg_context *ctx = shader->context; |
| VGint shader_id = 0; |
| VGBlendMode blend_mode = ctx->state.vg.blend_mode; |
| VGboolean black_white = is_format_bw(shader); |
| |
| /* 1st stage: fill */ |
| if (!shader->drawing_image || |
| (shader->image_mode == VG_DRAW_IMAGE_MULTIPLY || shader->image_mode == VG_DRAW_IMAGE_STENCIL)) { |
| switch(paint_type(shader->paint)) { |
| case VG_PAINT_TYPE_COLOR: |
| shader_id |= VEGA_SOLID_FILL_SHADER; |
| break; |
| case VG_PAINT_TYPE_LINEAR_GRADIENT: |
| shader_id |= VEGA_LINEAR_GRADIENT_SHADER; |
| break; |
| case VG_PAINT_TYPE_RADIAL_GRADIENT: |
| shader_id |= VEGA_RADIAL_GRADIENT_SHADER; |
| break; |
| case VG_PAINT_TYPE_PATTERN: |
| shader_id |= VEGA_PATTERN_SHADER; |
| break; |
| |
| default: |
| abort(); |
| } |
| |
| if (paint_is_degenerate(shader->paint)) |
| shader_id = VEGA_PAINT_DEGENERATE_SHADER; |
| } |
| |
| /* second stage image */ |
| if (shader->drawing_image) { |
| switch(shader->image_mode) { |
| case VG_DRAW_IMAGE_NORMAL: |
| shader_id |= VEGA_IMAGE_NORMAL_SHADER; |
| break; |
| case VG_DRAW_IMAGE_MULTIPLY: |
| shader_id |= VEGA_IMAGE_MULTIPLY_SHADER; |
| break; |
| case VG_DRAW_IMAGE_STENCIL: |
| shader_id |= VEGA_IMAGE_STENCIL_SHADER; |
| break; |
| default: |
| debug_printf("Unknown image mode!"); |
| } |
| } |
| |
| if (shader->color_transform) |
| shader_id |= VEGA_COLOR_TRANSFORM_SHADER; |
| |
| if (blend_use_shader(shader)) { |
| if (shader->drawing_image && shader->image_mode == VG_DRAW_IMAGE_STENCIL) |
| shader_id |= VEGA_ALPHA_PER_CHANNEL_SHADER; |
| else |
| shader_id |= VEGA_ALPHA_NORMAL_SHADER; |
| |
| switch(blend_mode) { |
| case VG_BLEND_SRC: |
| shader_id |= VEGA_BLEND_SRC_SHADER; |
| break; |
| case VG_BLEND_SRC_OVER: |
| shader_id |= VEGA_BLEND_SRC_OVER_SHADER; |
| break; |
| case VG_BLEND_DST_OVER: |
| shader_id |= VEGA_BLEND_DST_OVER_SHADER; |
| break; |
| case VG_BLEND_SRC_IN: |
| shader_id |= VEGA_BLEND_SRC_IN_SHADER; |
| break; |
| case VG_BLEND_DST_IN: |
| shader_id |= VEGA_BLEND_DST_IN_SHADER; |
| break; |
| case VG_BLEND_MULTIPLY: |
| shader_id |= VEGA_BLEND_MULTIPLY_SHADER; |
| break; |
| case VG_BLEND_SCREEN: |
| shader_id |= VEGA_BLEND_SCREEN_SHADER; |
| break; |
| case VG_BLEND_DARKEN: |
| shader_id |= VEGA_BLEND_DARKEN_SHADER; |
| break; |
| case VG_BLEND_LIGHTEN: |
| shader_id |= VEGA_BLEND_LIGHTEN_SHADER; |
| break; |
| case VG_BLEND_ADDITIVE: |
| shader_id |= VEGA_BLEND_ADDITIVE_SHADER; |
| break; |
| default: |
| assert(0); |
| break; |
| } |
| } |
| else { |
| /* update alpha of the source */ |
| if (shader->drawing_image && shader->image_mode == VG_DRAW_IMAGE_STENCIL) |
| shader_id |= VEGA_ALPHA_PER_CHANNEL_SHADER; |
| } |
| |
| if (shader->masking) |
| shader_id |= VEGA_MASK_SHADER; |
| |
| if (black_white) |
| shader_id |= VEGA_BW_SHADER; |
| |
| shader->fs = shaders_cache_fill(ctx->sc, shader_id); |
| } |
| |
| |
| void shader_bind(struct shader *shader) |
| { |
| struct vg_context *ctx = shader->context; |
| struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS]; |
| struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS]; |
| VGint num_samplers, param_bytes; |
| |
| /* first resolve the real paint type */ |
| paint_resolve_type(shader->paint); |
| |
| num_samplers = setup_samplers(shader, samplers, sampler_views); |
| param_bytes = setup_constant_buffer(shader); |
| setup_shader_program(shader); |
| |
| renderer_validate_for_shader(ctx->renderer, |
| (const struct pipe_sampler_state **) samplers, |
| sampler_views, num_samplers, |
| &shader->modelview, |
| shader->fs, (const void *) shader->constants, param_bytes); |
| } |
| |
| void shader_set_image_mode(struct shader *shader, VGImageMode image_mode) |
| { |
| shader->image_mode = image_mode; |
| } |
| |
| VGImageMode shader_image_mode(struct shader *shader) |
| { |
| return shader->image_mode; |
| } |
| |
| void shader_set_drawing_image(struct shader *shader, VGboolean drawing_image) |
| { |
| shader->drawing_image = drawing_image; |
| } |
| |
| VGboolean shader_drawing_image(struct shader *shader) |
| { |
| return shader->drawing_image; |
| } |
| |
| void shader_set_image(struct shader *shader, struct vg_image *img) |
| { |
| shader->image = img; |
| } |
| |
| /** |
| * Set the transformation to map a vertex to the surface coordinates. |
| */ |
| void shader_set_surface_matrix(struct shader *shader, |
| const struct matrix *mat) |
| { |
| shader->modelview = *mat; |
| } |
| |
| /** |
| * Set the transformation to map a pixel to the paint coordinates. |
| */ |
| void shader_set_paint_matrix(struct shader *shader, const struct matrix *mat) |
| { |
| const struct st_framebuffer *stfb = shader->context->draw_buffer; |
| const VGfloat px_center_offset = 0.5f; |
| |
| memcpy(&shader->paint_matrix, mat, sizeof(*mat)); |
| |
| /* make it window-to-paint for the shaders */ |
| matrix_translate(&shader->paint_matrix, px_center_offset, |
| stfb->height - 1.0f + px_center_offset); |
| matrix_scale(&shader->paint_matrix, 1.0f, -1.0f); |
| } |