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path: root/source/blender/draw/engines/gpencil/gpencil_render.c
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Diffstat (limited to 'source/blender/draw/engines/gpencil/gpencil_render.c')
-rw-r--r--source/blender/draw/engines/gpencil/gpencil_render.c365
1 files changed, 120 insertions, 245 deletions
diff --git a/source/blender/draw/engines/gpencil/gpencil_render.c b/source/blender/draw/engines/gpencil/gpencil_render.c
index 8c126310ea2..083b04c0600 100644
--- a/source/blender/draw/engines/gpencil/gpencil_render.c
+++ b/source/blender/draw/engines/gpencil/gpencil_render.c
@@ -33,66 +33,22 @@
#include "gpencil_engine.h"
-/* Get pixel size for render
- * This function uses the same calculation used for viewport, because if use
- * camera pixelsize, the result is not correct.
- */
-static float get_render_pixelsize(float persmat[4][4], int winx, int winy)
-{
- float v1[3], v2[3];
- float len_px, len_sc;
-
- v1[0] = persmat[0][0];
- v1[1] = persmat[1][0];
- v1[2] = persmat[2][0];
-
- v2[0] = persmat[0][1];
- v2[1] = persmat[1][1];
- v2[2] = persmat[2][1];
-
- len_px = 2.0f / sqrtf(min_ff(len_squared_v3(v1), len_squared_v3(v2)));
- len_sc = (float)MAX2(winx, winy);
-
- return len_px / len_sc;
-}
-
/* init render data */
-void GPENCIL_render_init(GPENCIL_Data *ved, RenderEngine *engine, struct Depsgraph *depsgraph)
+void GPENCIL_render_init(GPENCIL_Data *vedata,
+ RenderEngine *engine,
+ struct RenderLayer *render_layer,
+ const Depsgraph *depsgraph,
+ const rcti *rect)
{
- GPENCIL_Data *vedata = (GPENCIL_Data *)ved;
- GPENCIL_StorageList *stl = vedata->stl;
GPENCIL_FramebufferList *fbl = vedata->fbl;
+ GPENCIL_TextureList *txl = vedata->txl;
Scene *scene = DEG_get_evaluated_scene(depsgraph);
const float *viewport_size = DRW_viewport_size_get();
const int size[2] = {(int)viewport_size[0], (int)viewport_size[1]};
- /* In render mode the default framebuffer is not generated
- * because there is no viewport. So we need to manually create one
- * NOTE : use 32 bit format for precision in render mode.
- */
- /* create multisample framebuffer for AA */
- if (U.gpencil_multisamples > 0) {
- int rect_w = (int)viewport_size[0];
- int rect_h = (int)viewport_size[1];
- gpencil_multisample_ensure(vedata, rect_w, rect_h);
- }
-
- vedata->render_depth_tx = DRW_texture_pool_query_2d(
- size[0], size[1], GPU_DEPTH_COMPONENT24, &draw_engine_gpencil_type);
- vedata->render_color_tx = DRW_texture_pool_query_2d(
- size[0], size[1], GPU_RGBA32F, &draw_engine_gpencil_type);
- GPU_framebuffer_ensure_config(&fbl->main,
- {GPU_ATTACHMENT_TEXTURE(vedata->render_depth_tx),
- GPU_ATTACHMENT_TEXTURE(vedata->render_color_tx)});
-
- /* Alloc transient data. */
- if (!stl->g_data) {
- stl->g_data = MEM_callocN(sizeof(*stl->g_data), __func__);
- }
-
/* Set the pers & view matrix. */
- float winmat[4][4], viewmat[4][4], viewinv[4][4], persmat[4][4];
+ float winmat[4][4], viewmat[4][4], viewinv[4][4];
struct Object *camera = DEG_get_evaluated_object(depsgraph, RE_GetCamera(engine->re));
float frame = BKE_scene_frame_get(scene);
@@ -105,85 +61,101 @@ void GPENCIL_render_init(GPENCIL_Data *ved, RenderEngine *engine, struct Depsgra
DRW_view_default_set(view);
DRW_view_set_active(view);
- DRW_view_persmat_get(NULL, persmat, false);
+ /* Create depth texture & color texture from render result. */
+ const char *viewname = RE_GetActiveRenderView(engine->re);
+ RenderPass *rpass_z_src = RE_pass_find_by_name(render_layer, RE_PASSNAME_Z, viewname);
+ RenderPass *rpass_col_src = RE_pass_find_by_name(render_layer, RE_PASSNAME_COMBINED, viewname);
- /* calculate pixel size for render */
- stl->storage->render_pixsize = get_render_pixelsize(persmat, viewport_size[0], viewport_size[1]);
+ float *pix_z = (rpass_z_src) ? rpass_z_src->rect : NULL;
+ float *pix_col = (rpass_col_src) ? rpass_col_src->rect : NULL;
- /* INIT CACHE */
- GPENCIL_cache_init(vedata);
+ if (!pix_z || !pix_col) {
+ RE_engine_set_error_message(engine,
+ "Warning: To render grease pencil, enable Combined and Z passes.");
+ }
+
+ if (pix_z) {
+ /* Depth need to be remapped to [0..1] range. */
+ pix_z = MEM_dupallocN(pix_z);
+
+ int pix_ct = rpass_z_src->rectx * rpass_z_src->recty;
+
+ if (DRW_view_is_persp_get(view)) {
+ for (int i = 0; i < pix_ct; i++) {
+ pix_z[i] = (-winmat[3][2] / -pix_z[i]) - winmat[2][2];
+ pix_z[i] = clamp_f(pix_z[i] * 0.5f + 0.5f, 0.0f, 1.0f);
+ }
+ }
+ else {
+ /* Keep in mind, near and far distance are negatives. */
+ float near = DRW_view_near_distance_get(view);
+ float far = DRW_view_far_distance_get(view);
+ float range_inv = 1.0f / fabsf(far - near);
+ for (int i = 0; i < pix_ct; i++) {
+ pix_z[i] = (pix_z[i] + near) * range_inv;
+ pix_z[i] = clamp_f(pix_z[i], 0.0f, 1.0f);
+ }
+ }
+ }
+
+ const bool do_region = (scene->r.mode & R_BORDER) != 0;
+ const bool do_clear_z = !pix_z || do_region;
+ const bool do_clear_col = !pix_col || do_region;
+
+ /* FIXME(fclem): we have a precision loss in the depth buffer because of this reupload.
+ * Find where it comes from! */
+ txl->render_depth_tx = DRW_texture_create_2d(
+ size[0], size[1], GPU_DEPTH_COMPONENT24, 0, do_region ? NULL : pix_z);
+ txl->render_color_tx = DRW_texture_create_2d(
+ size[0], size[1], GPU_RGBA16F, 0, do_region ? NULL : pix_col);
+
+ GPU_framebuffer_ensure_config(&fbl->render_fb,
+ {
+ GPU_ATTACHMENT_TEXTURE(txl->render_depth_tx),
+ GPU_ATTACHMENT_TEXTURE(txl->render_color_tx),
+ });
+
+ if (do_clear_z || do_clear_col) {
+ /* To avoid unpredictable result, clear buffers that have not be initialized. */
+ GPU_framebuffer_bind(fbl->render_fb);
+ if (do_clear_col) {
+ float clear_col[4] = {0.0f, 0.0f, 0.0f, 0.0f};
+ GPU_framebuffer_clear_color(fbl->render_fb, clear_col);
+ }
+ if (do_clear_z) {
+ GPU_framebuffer_clear_depth(fbl->render_fb, 1.0f);
+ }
+ }
+
+ if (do_region) {
+ int x = rect->xmin;
+ int y = rect->ymin;
+ int w = BLI_rcti_size_x(rect);
+ int h = BLI_rcti_size_y(rect);
+ if (pix_col) {
+ GPU_texture_update_sub(txl->render_color_tx, GPU_DATA_FLOAT, pix_col, x, y, 0, w, h, 0);
+ }
+ if (pix_z) {
+ GPU_texture_update_sub(txl->render_depth_tx, GPU_DATA_FLOAT, pix_z, x, y, 0, w, h, 0);
+ }
+ }
+
+ MEM_SAFE_FREE(pix_z);
}
/* render all objects and select only grease pencil */
static void GPENCIL_render_cache(void *vedata,
struct Object *ob,
struct RenderEngine *UNUSED(engine),
- struct Depsgraph *UNUSED(depsgraph))
+ Depsgraph *UNUSED(depsgraph))
{
- if (ob && ob->type == OB_GPENCIL) {
+ if (ob && ELEM(ob->type, OB_GPENCIL, OB_LAMP)) {
if (DRW_object_visibility_in_active_context(ob) & OB_VISIBLE_SELF) {
GPENCIL_cache_populate(vedata, ob);
}
}
}
-/* TODO: Reuse Eevee code in shared module instead to duplicate here */
-static void GPENCIL_render_update_viewvecs(float invproj[4][4],
- const float winmat[4][4],
- float (*r_viewvecs)[4])
-{
- /* view vectors for the corners of the view frustum.
- * Can be used to recreate the world space position easily */
- float view_vecs[4][4] = {
- {-1.0f, -1.0f, -1.0f, 1.0f},
- {1.0f, -1.0f, -1.0f, 1.0f},
- {-1.0f, 1.0f, -1.0f, 1.0f},
- {-1.0f, -1.0f, 1.0f, 1.0f},
- };
-
- /* convert the view vectors to view space */
- const bool is_persp = (winmat[3][3] == 0.0f);
- for (int i = 0; i < 4; i++) {
- mul_project_m4_v3(invproj, view_vecs[i]);
- /* normalized trick see:
- * http://www.derschmale.com/2014/01/26/reconstructing-positions-from-the-depth-buffer */
- if (is_persp) {
- /* Divide XY by Z. */
- mul_v2_fl(view_vecs[i], 1.0f / view_vecs[i][2]);
- }
- }
-
- /**
- * If ortho : view_vecs[0] is the near-bottom-left corner of the frustum and
- * view_vecs[1] is the vector going from the near-bottom-left corner to
- * the far-top-right corner.
- * If Persp : view_vecs[0].xy and view_vecs[1].xy are respectively the bottom-left corner
- * when Z = 1, and top-left corner if Z = 1.
- * view_vecs[0].z the near clip distance and view_vecs[1].z is the (signed)
- * distance from the near plane to the far clip plane.
- */
- copy_v4_v4(r_viewvecs[0], view_vecs[0]);
-
- /* we need to store the differences */
- r_viewvecs[1][0] = view_vecs[1][0] - view_vecs[0][0];
- r_viewvecs[1][1] = view_vecs[2][1] - view_vecs[0][1];
- r_viewvecs[1][2] = view_vecs[3][2] - view_vecs[0][2];
-}
-
-/* Update view_vecs */
-static void GPENCIL_render_update_vecs(GPENCIL_Data *vedata)
-{
- GPENCIL_StorageList *stl = vedata->stl;
-
- float invproj[4][4], winmat[4][4];
- DRW_view_winmat_get(NULL, winmat, false);
- DRW_view_winmat_get(NULL, invproj, true);
-
- /* this is separated to keep function equal to Eevee for future reuse of same code */
- GPENCIL_render_update_viewvecs(invproj, winmat, stl->storage->view_vecs);
-}
-
-/* read z-depth render result */
static void GPENCIL_render_result_z(struct RenderLayer *rl,
const char *viewname,
GPENCIL_Data *vedata,
@@ -191,45 +163,52 @@ static void GPENCIL_render_result_z(struct RenderLayer *rl,
{
const DRWContextState *draw_ctx = DRW_context_state_get();
ViewLayer *view_layer = draw_ctx->view_layer;
- GPENCIL_StorageList *stl = vedata->stl;
if ((view_layer->passflag & SCE_PASS_Z) != 0) {
RenderPass *rp = RE_pass_find_by_name(rl, RE_PASSNAME_Z, viewname);
- GPU_framebuffer_read_depth(vedata->fbl->main,
+ GPU_framebuffer_read_depth(vedata->fbl->render_fb,
rect->xmin,
rect->ymin,
BLI_rcti_size_x(rect),
BLI_rcti_size_y(rect),
rp->rect);
- bool is_persp = DRW_view_is_persp_get(NULL);
-
- GPENCIL_render_update_vecs(vedata);
-
float winmat[4][4];
DRW_view_winmat_get(NULL, winmat, false);
+ int pix_ct = BLI_rcti_size_x(rect) * BLI_rcti_size_y(rect);
+
/* Convert ogl depth [0..1] to view Z [near..far] */
- for (int i = 0; i < BLI_rcti_size_x(rect) * BLI_rcti_size_y(rect); i++) {
- if (rp->rect[i] == 1.0f) {
- rp->rect[i] = 1e10f; /* Background */
- }
- else {
- if (is_persp) {
+ if (DRW_view_is_persp_get(NULL)) {
+ for (int i = 0; i < pix_ct; i++) {
+ if (rp->rect[i] == 1.0f) {
+ rp->rect[i] = 1e10f; /* Background */
+ }
+ else {
rp->rect[i] = rp->rect[i] * 2.0f - 1.0f;
rp->rect[i] = winmat[3][2] / (rp->rect[i] + winmat[2][2]);
}
+ }
+ }
+ else {
+ /* Keep in mind, near and far distance are negatives. */
+ float near = DRW_view_near_distance_get(NULL);
+ float far = DRW_view_far_distance_get(NULL);
+ float range = fabsf(far - near);
+
+ for (int i = 0; i < pix_ct; i++) {
+ if (rp->rect[i] == 1.0f) {
+ rp->rect[i] = 1e10f; /* Background */
+ }
else {
- rp->rect[i] = -stl->storage->view_vecs[0][2] +
- rp->rect[i] * -stl->storage->view_vecs[1][2];
+ rp->rect[i] = -rp->rect[i] * range + near;
}
}
}
}
}
-/* read combined render result */
static void GPENCIL_render_result_combined(struct RenderLayer *rl,
const char *viewname,
GPENCIL_Data *vedata,
@@ -238,8 +217,8 @@ static void GPENCIL_render_result_combined(struct RenderLayer *rl,
RenderPass *rp = RE_pass_find_by_name(rl, RE_PASSNAME_COMBINED, viewname);
GPENCIL_FramebufferList *fbl = ((GPENCIL_Data *)vedata)->fbl;
- GPU_framebuffer_bind(fbl->main);
- GPU_framebuffer_read_color(vedata->fbl->main,
+ GPU_framebuffer_bind(fbl->render_fb);
+ GPU_framebuffer_read_color(vedata->fbl->render_fb,
rect->xmin,
rect->ymin,
BLI_rcti_size_x(rect),
@@ -249,135 +228,31 @@ static void GPENCIL_render_result_combined(struct RenderLayer *rl,
rp->rect);
}
-/* helper to blend pixels */
-static void blend_pixel(float top_color[4], float bottom_color[4], float dst_color[4])
-{
- float alpha = top_color[3];
-
- /* use blend: GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA */
- dst_color[0] = (top_color[0] * alpha) + (bottom_color[0] * (1.0f - alpha));
- dst_color[1] = (top_color[1] * alpha) + (bottom_color[1] * (1.0f - alpha));
- dst_color[2] = (top_color[2] * alpha) + (bottom_color[2] * (1.0f - alpha));
-}
-
-/* render grease pencil to image */
-void GPENCIL_render_to_image(void *vedata,
+void GPENCIL_render_to_image(void *ved,
RenderEngine *engine,
struct RenderLayer *render_layer,
const rcti *rect)
{
+ GPENCIL_Data *vedata = (GPENCIL_Data *)ved;
const char *viewname = RE_GetActiveRenderView(engine->re);
const DRWContextState *draw_ctx = DRW_context_state_get();
- int imgsize = BLI_rcti_size_x(rect) * BLI_rcti_size_y(rect);
-
- /* save previous render data */
- RenderPass *rpass_color_src = RE_pass_find_by_name(render_layer, RE_PASSNAME_COMBINED, viewname);
- RenderPass *rpass_depth_src = RE_pass_find_by_name(render_layer, RE_PASSNAME_Z, viewname);
- float *src_rect_color_data = NULL;
- float *src_rect_depth_data = NULL;
- if ((rpass_color_src) && (rpass_depth_src) && (rpass_color_src->rect) &&
- (rpass_depth_src->rect)) {
- src_rect_color_data = MEM_dupallocN(rpass_color_src->rect);
- src_rect_depth_data = MEM_dupallocN(rpass_depth_src->rect);
- }
- else {
- /* TODO: put this message in a better place */
- printf("Warning: To render grease pencil, enable Combined and Z passes.\n");
- }
+ Depsgraph *depsgraph = draw_ctx->depsgraph;
+ GPENCIL_render_init(vedata, engine, render_layer, depsgraph, rect);
GPENCIL_engine_init(vedata);
- GPENCIL_render_init(vedata, engine, draw_ctx->depsgraph);
- GPENCIL_StorageList *stl = ((GPENCIL_Data *)vedata)->stl;
- Object *camera = DEG_get_evaluated_object(draw_ctx->depsgraph, RE_GetCamera(engine->re));
- stl->storage->camera = camera; /* save current camera */
-
- GPENCIL_FramebufferList *fbl = ((GPENCIL_Data *)vedata)->fbl;
- if (fbl->main) {
- GPU_framebuffer_texture_attach(fbl->main, ((GPENCIL_Data *)vedata)->render_depth_tx, 0, 0);
- GPU_framebuffer_texture_attach(fbl->main, ((GPENCIL_Data *)vedata)->render_color_tx, 0, 0);
- /* clean first time the buffer */
- float clearcol[4] = {0.0f, 0.0f, 0.0f, 0.0f};
- GPU_framebuffer_bind(fbl->main);
- GPU_framebuffer_clear_color_depth(fbl->main, clearcol, 1.0f);
- }
-
- /* loop all objects and draw */
- DRW_render_object_iter(vedata, engine, draw_ctx->depsgraph, GPENCIL_render_cache);
+ vedata->stl->pd->camera = DEG_get_evaluated_object(depsgraph, RE_GetCamera(engine->re));
+ /* Loop over all objects and create draw structure. */
+ GPENCIL_cache_init(vedata);
+ DRW_render_object_iter(vedata, engine, depsgraph, GPENCIL_render_cache);
GPENCIL_cache_finish(vedata);
DRW_render_instance_buffer_finish();
+ /* Render the gpencil object and merge the result to the underlying render. */
GPENCIL_draw_scene(vedata);
- /* combined data */
GPENCIL_render_result_combined(render_layer, viewname, vedata, rect);
- /* z-depth data */
GPENCIL_render_result_z(render_layer, viewname, vedata, rect);
-
- /* detach textures */
- if (fbl->main) {
- GPU_framebuffer_texture_detach(fbl->main, ((GPENCIL_Data *)vedata)->render_depth_tx);
- GPU_framebuffer_texture_detach(fbl->main, ((GPENCIL_Data *)vedata)->render_color_tx);
- }
-
- /* merge previous render image with new GP image */
- if (src_rect_color_data) {
- RenderPass *rpass_color_gp = RE_pass_find_by_name(
- render_layer, RE_PASSNAME_COMBINED, viewname);
- RenderPass *rpass_depth_gp = RE_pass_find_by_name(render_layer, RE_PASSNAME_Z, viewname);
- float *gp_rect_color_data = rpass_color_gp->rect;
- float *gp_rect_depth_data = rpass_depth_gp->rect;
- float *gp_pixel_rgba;
- float *gp_pixel_depth;
- float *src_pixel_rgba;
- float *src_pixel_depth;
-
- for (int i = 0; i < imgsize; i++) {
- gp_pixel_rgba = &gp_rect_color_data[i * 4];
- gp_pixel_depth = &gp_rect_depth_data[i];
-
- src_pixel_rgba = &src_rect_color_data[i * 4];
- src_pixel_depth = &src_rect_depth_data[i];
-
- /* check grease pencil render transparency */
- if (gp_pixel_rgba[3] > 0.0f) {
- if (src_pixel_rgba[3] > 0.0f) {
- /* check z-depth */
- if (gp_pixel_depth[0] > src_pixel_depth[0]) {
- /* copy source z-depth */
- gp_pixel_depth[0] = src_pixel_depth[0];
- /* blend object on top */
- if (src_pixel_rgba[3] < 1.0f) {
- blend_pixel(src_pixel_rgba, gp_pixel_rgba, gp_pixel_rgba);
- }
- else {
- copy_v4_v4(gp_pixel_rgba, src_pixel_rgba);
- }
- }
- else {
- /* blend gp render */
- if (gp_pixel_rgba[3] < 1.0f) {
- /* premult alpha factor to remove double blend effects */
- mul_v3_fl(gp_pixel_rgba, 1.0f / gp_pixel_rgba[3]);
-
- blend_pixel(gp_pixel_rgba, src_pixel_rgba, gp_pixel_rgba);
-
- gp_pixel_rgba[3] = gp_pixel_rgba[3] > src_pixel_rgba[3] ? gp_pixel_rgba[3] :
- src_pixel_rgba[3];
- }
- }
- }
- }
- else {
- copy_v4_v4(gp_pixel_rgba, src_pixel_rgba);
- gp_pixel_depth[0] = src_pixel_depth[0];
- }
- }
-
- /* free memory */
- MEM_SAFE_FREE(src_rect_color_data);
- MEM_SAFE_FREE(src_rect_depth_data);
- }
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-23 04:18:36 +0300