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Gizmo: use fonts for drawing 3D axis characters

This commit is contained in:
Campbell Barton 2018-11-05 10:44:30 +11:00
parent 1e56c8c47d
commit c192ce6717
Notes: blender-bot 2023-02-14 11:35:46 +01:00 
Referenced by issue #60414, Eevee mp4 texture
1 changed files with 61 additions and 2 deletions
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63
source/blender/editors/space_view3d/view3d_gizmo_navigate_type.c
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@ -60,6 +60,11 @@
#include "view3d_intern.h"
#define USE_AXIS_FONT
#ifdef USE_AXIS_FONT
# include "BLF_api.h"
#endif
#define DIAL_RESOLUTION 32
/* Sizes of axis spheres containing XYZ characters. */
@ -69,6 +74,7 @@
/* How far axis handles are away from the center. */
#define AXIS_HANDLE_OFFSET (1.0f - AXIS_HANDLE_SIZE_FG)
#ifndef USE_AXIS_FONT
/**
* \param viewmat_local_unit is typically the 'rv3d->viewmatob'
* copied into a 3x3 matrix and normalized.
@ -172,8 +178,12 @@ static void draw_xyz_wire(
}
immEnd();
}
#endif /* !USE_AXIS_FONT */
static void axis_geom_draw(const wmGizmo *gz, const float color[4], const bool UNUSED(select))
static void axis_geom_draw(
const wmGizmo *gz, const float color[4], const bool UNUSED(select),
/* Needed for screen-aligned font drawing. */
const float matrix_final[4][4])
{
GPU_line_width(gz->line_width);
@ -199,6 +209,33 @@ static void axis_geom_draw(const wmGizmo *gz, const float color[4], const bool U
static const float axis_highlight[4] = {1, 1, 1, 1};
static const float axis_black[4] = {0, 0, 0, 1};
static float axis_color[3][4];
#ifdef USE_AXIS_FONT
struct {
float matrix[4][4];
} font;
{
BLF_disable(blf_mono_font, BLF_ROTATION | BLF_SHADOW | BLF_MATRIX | BLF_ASPECT | BLF_WORD_WRAP);
BLF_color4fv(blf_mono_font, axis_black);
BLF_size(blf_mono_font, 11 * U.dpi_fac, 72);
/* Calculate the inverse of the (matrix_final * matrix_offset).
* This allows us to use the final location, while reversing the rotation so fonts
* show without any rotation. */
float m3[3][3];
float m3_offset[3][3];
copy_m3_m4(m3, matrix_final);
copy_m3_m4(m3_offset, gz->matrix_offset);
mul_m3_m3m3(m3, m3, m3_offset);
invert_m3(m3);
copy_m4_m3(font.matrix, m3);
}
#else
UNUSED_VARS(matrix_final);
#endif
GPU_matrix_push();
GPU_matrix_mul(gz->matrix_offset);
@ -292,15 +329,37 @@ static void axis_geom_draw(const wmGizmo *gz, const float color[4], const bool U
/* Axis XYZ Character. */
if (show_axis_char) {
#ifdef USE_AXIS_FONT
immUnbindProgram();
GPU_matrix_push();
GPU_matrix_translate_3fv(v_final);
GPU_matrix_mul(font.matrix);
const char axis_str[2] = {'X' + axis, 0};
float offset[2] = {0};
BLF_width_and_height(blf_mono_font, axis_str, 2, &offset[0], &offset[1]);
BLF_position(blf_mono_font, roundf(offset[0] * -0.5f), roundf(offset[1] * -0.5f), 0);
BLF_draw_ascii(blf_mono_font, axis_str, 2);
GPU_blend(true); /* XXX, blf disables */
GPU_matrix_pop();
immBindBuiltinProgram(GPU_SHADER_3D_UNIFORM_COLOR);
#else
GPU_line_width(1.0f);
float m3[3][3];
copy_m3_m4(m3, gz->matrix_offset);
immUniformColor4fv(axis_black);
draw_xyz_wire(pos_id, m3, v_final, 1.0, axis);
#endif
}
}
}
#ifdef USE_AXIS_FONT
BLF_disable(blf_mono_font, BLF_MATRIX);
#endif
GPU_matrix_pop();
immUnbindProgram();
}
@ -325,7 +384,7 @@ static void axis3d_draw_intern(
GPU_matrix_mul(matrix_final);
GPU_blend(true);
axis_geom_draw(gz, color, select);
axis_geom_draw(gz, color, select, matrix_final);
GPU_blend(false);
GPU_matrix_pop();
}